Source: http://www.google.com/patents/US20070127726?dq=6,219,045
Timestamp: 2017-03-25 10:59:23
Document Index: 620646757

Matched Legal Cases: ['Application No. 60', 'arts 500', 'art 1100', 'art 1300', 'art 1000', 'art 1800', 'art 2110', 'art 2110', 'art 3000', 'art 3400', 'art 3500', 'art 3700', 'art 3800', 'art 3900']

Patent US20070127726 - Multiple radio signal processing and storing method and apparatus - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsWe have disclosed an enhanced radio system that provides for the capture and playback of one or more radio stations. The user may tune to a station, or scan through stations, rewind to hear what was missed, and fast-forward through undesired content. The system allows a user to rate content, and to be...http://www.google.com/patents/US20070127726?utm_source=gb-gplus-sharePatent US20070127726 - Multiple radio signal processing and storing method and apparatusAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS20070127726 A1Publication typeApplicationApplication numberUS 11/609,512Publication dateJun 7, 2007Filing dateDec 12, 2006Priority dateFeb 20, 2001Also published asCA2438998A1, CA2438998C, CA2742644A1, CA2742644C, CA2836213A1, EP1364469A2, US7171174, US7343141, US8788075, US8965313, US20040116088, US20050020223, US20090023406, US20150133046, US20150288472, WO2002067447A2, WO2002067447A3, WO2002067447B1Publication number11609512, 609512, US 2007/0127726 A1, US 2007/127726 A1, US 20070127726 A1, US 20070127726A1, US 2007127726 A1, US 2007127726A1, US-A1-20070127726, US-A1-2007127726, US2007/0127726A1, US2007/127726A1, US20070127726 A1, US20070127726A1, US2007127726 A1, US2007127726A1InventorsMichael Ellis, Caron EllisOriginal AssigneeEllis Michael D, Ellis Caron SExport CitationBiBTeX, EndNote, RefManPatent Citations (62), Referenced by (23), Classifications (54), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetMultiple radio signal processing and storing method and apparatus
US 20070127726 A1Abstract
We have disclosed an enhanced radio system that provides for the capture and playback of one or more radio stations. The user may tune to a station, or scan through stations, rewind to hear what was missed, and fast-forward through undesired content. The system allows a user to rate content, and to be notified when that content is being played on any station. The system may make radio station recommendations. The system allows the user to respond easily to radio content, download audio content, and send radio content to another user. The system may provide other radio related and radio content related information. The system may provide a karaoke mode. The system may also allow the user to integrate a telephone with the radio. The system may report usage information to a collection facility. Images(43) Claims(24)
CROSS REFERENCE TO RELATED APPLICATION [0001] This application is a continuation of U.S. application Ser. No. 10/645,928 filed Aug. 20, 2003, now Patent No. ______, which is a continuation of the U.S. national stage designation of International Application PCT/US02/05039 filed Feb. 20, 2002, and claims the benefit of U.S. Provisional Patent Application No. 60/270,463, filed Feb. 20, 2001, which are hereby incorporated by reference herein in their entirety.
FIELD OF INVENTION [0002] Our invention relates to radio systems and methods. In particular this invention relates to enhanced radio reception and processing features, utilizing multiple radio receivers, digital storage of radio content, independent control of radio reception and playback, listener profiles, and two-way communication features. BACKGROUND OF THE INVENTION [0003] Radio is a very popular entertainment source today. It is used in many locations—in the home, in the automobile, at the office, and on the go. Sources available today include broadcast (AM and FM), Internet, and satellite. However, radio functions have been fairly constant for years. [0004] New technologies have become available in recent years. These include less expensive tuners, less expensive memory, and better quality analog to digital conversion. These technologies make possible an enhanced radio system. [0005] Some improvements have been made in television systems recently. Personal video recorders, such as those manufactured by TiVo, allow a user to easily record a television program, and also provide VCR-like controls for television programs. For example, see U.S. Pat. No. 6,259,441 (2001) to Ahmad et al., “Display pause with elastic playback,” U.S. Pat. No. 6,327,418 (2001) to Barton, “Method and apparatus implementing random access and time-based functions on a continuous stream of formatted digital data,” and U.S. Pat. No. 6,233,389 (2001) to Barton et al., “Multimedia time warping system”. However, these types of improvements have been optimized for the needs of the television viewer. For instance, this prior art focuses on improving the viewing of specific television programs. [0006] Radio listeners typically have different needs than television viewers. For example, television viewing typically happens in a fixed environment in a home, while radio listening often happens in varied, often mobile, environments. People may listen to the radio in a shower. People often listen to radio in a car, or carry a radio on their person as they pursue other activities. A television viewer may sit and watch a program through its completion. A radio listener more often listens casually while pursuing other activities, and may often switch between stations based on hearing a short duration item, such as a song, commercial, or traffic/weather report. Program schedules are quire important to television viewers, but are rarely used by radio listeners. [0007] A system is needed that allows a radio listener to better control the audio content she hears. For example, a listener may need a way to easily back up and hear something again. This might include, for example, repeating a piece of information from a weather report or a traffic report, a phone number or other item in an advertisement, a favorite song, or information about a radio contest. [0008] A radio listener may also need a way to pause the radio content while doing something else. For example, a listener in a car may wish to pause a song while concentrating on traffic or talking to someone else in the car. After resuming the song, the listener may listen to the remainder of the song and then may subsequently wish to fast-forward through commercials to catch up to the real-time broadcast. [0009] U.S. Pat. No. 5,345,430 (1994) to Moe, “Recovery recorder system, particularly commercial radio/TV broadcast recovery recorder system,” discloses continuously recording the last few minutes of a program being monitored to a short-term memory, and transferring it, on operator command, to a long-term storage media. U.S. Pat. No. 5,448,534 (1995) to Okada, “Radio with recording and reproducing function,” discloses detecting a desired program and starting a recording device to record the program. However, this prior art requires a user to select a specific radio station or program to record. [0010] Because digitized audio content requires much less memory than digitized video content, it is less expensive to store a significant amount of radio content. A radio tuner is also less costly than a television tuner, so a system that monitors multiple radio stations at once is quite feasible. Because a radio listener is quite likely to be interested in the programming on multiple radio stations at the same time, a system with multiple tuners and significant but inexpensive memory is also quite useful. [0011] For example, a system is needed that would allow a user to switch between multiple favorite radio stations and rewind to the start of an interesting piece of content that may have been missed, such as a favorite song or a traffic report. Because detailed radio content schedules are not typically published in advance, it would also be useful to have a system that allows a user to identify items of interest, that informs the user when an item of interest is being broadcast on another station, and that allows the user to switch to that station and rewind back to the start of the item. [0012] Since radio listeners frequently sing along with favorite tunes in locations such as the shower and the car, a user may wish to sing along with a radio in a karaoke mode. [0013] A system is also needed to recommend a set of radio stations to a user. This would be particularly useful for traveling users, or users new to an area. Such a system might allow a radio listener in a rental car or hotel to automatically search a database of radio stations and find one or more that matches his tastes. A driver on a long trip may need a system that automatically monitors available radio stations and compares the content with his likes. [0014] Traveling listeners may also need a system to inform them of venues and events in an unfamiliar local area. For example, a listener may be interested in finding out about concerts, celebrity appearances, radio station events, concert venues, music stores, and the like. [0015] Radio listeners often listen in multiple environments—in different rooms of the house, in the car, in the office, and using a portable system. These listeners need a system that allows them to use the advanced radio features in all of these environments. They need a way to transfer information, such as radio presets, favorite songs, and favorite artists, from one environment to another. They need a way to update the functionality of the radio without having to purchase a new system. They need a system that allows downloading of favorite songs into a radio. [0016] Radio listeners also need an Internet environment to coordinate their enhanced radio listening activities. These activities might include finding out about music, shopping for music related products, and finding out about radio stations. They may also need a system that allows them to manage the information used in an enhanced radio system, such as favorite stations, artists, and songs. [0017] A radio listener may also need a way to more easily respond to radio content. For example, a listener may wish to respond to an ad, enter a radio contest, call in to a radio talk show, or make a song request. The user may need a system that allows a telephone to be used with the radio system. [0018] A radio listener also needs a way to more easily communicate with other radio listeners. A listener may wish to send information heard on the radio to another person. This information may include an invitation to or information about a concert or other event, a link to a radio station or radio show, a song heard on the radio, or other radio-related information. [0019] In addition to radio listeners, radio service providers may also benefit from our invention. Radio service providers need a system that allows them to monitor the habits of their listeners' demographic profile such as which commercials they repeat, which artists they favor, etc., as well as what enhanced radio features their users may access. SUMMARY [0020] These and other advantages are provided by our enhanced radio system. A main aspect of our invention is simultaneously storing the content from multiple radio receivers. Another aspect of our invention is allowing the multiple receivers to be tuned to radio stations based on stations chosen as favorites by the listener, based on recently played stations, and based on scanning for new stations. Another aspect of our invention is allowing a listener to quickly select output from the stored content of any of the receivers. A further aspect is allowing a listener to pause, resume, or skip backwards or forwards in time within any of the stored content, including allowing a listener to hear radio content broadcast prior to switching to a station. Another aspect of our invention is allowing a listener to record radio content, or download other audio content, and quickly access it later. Yet another aspect of our invention relates to providing a karaoke feature, with the removal of vocal tracks and the display of lyrics for broadcast songs. [0021] Other aspects of our invention relate to the collection and use of user preferences. A listener may be allowed to rate specific content or groups of content. The system may recognize and notify the listener of preferred content when it is broadcast on a station that the listener is not currently listening to. The system may recognize and automatically skip over disliked content when it is played on a station the user is listening to. The system may recommend radio stations to a listener. The system may recommend local events and facilities to a listener. [0022] Still further aspects of our invention relate to communications. Our invention may interact with a mobile or stationary telephone, using the radio's sound system, and may automatically pause or mute the radio during calls. Our invention may allow a listener to send and receive messages with another listener, including recorded radio content. Our invention may allow a listener to easily respond to radio content, such as contests, requests, call-in shows, pledge drives, etc. A listener can purchase CDs, concert tickets, and other products and services. Our invention may include an Internet website, with additional radio features. And our invention may provide monitoring of listener usage and habits to provide a ratings service. [0023] Other aspects of our invention relate to portability and configurability. Our enhanced radio system may be used at home, at the office, in the shower, on the go, in the car, on the boat, or in any other environment. It may be used in multiple environments. And user preferences and profiles may follow the listener in any of these environments, from radio to radio. [0024] This system can tune in one or more radio sources, such as broadcast radio, satellite radio, Internet radio, short-wave radio, and radio scanners. The system may employ multiple receivers (e.g., antennas, tuners, etc.), so that the system can monitor multiple radio stations at the same time. If any of the input signals is analog, it is digitized, and then the digital radio signal is stored in memory. [0025] Our invention also includes a controller, such as a microprocessor with program memory, to control the functions of the receivers, digitizers, and other parts of the system. A user can control the functions of the controller using an input device such as a remote control, a voice control, a front panel control, etc. There may also be a display to provide visual feedback to the user. [0026] Digital audio signals are retrieved from the memory on command from the user, converted to analog signals, and sent to an output device, which may include an amplifier, speakers, and the like. [0027] Our enhanced radio system may be operated in a home or office, in a shower, in a car, truck or boat, or as a portable system carried or worn by the user. The system may also be configurable so that it can operate in multiple environments by, for example, allowing the user to use different input controls and different audio output devices. [0028] Our invention may provide a number of features beyond what are provided by standard radios today. For example, the system may allow the user to stop, rewind, fast-forward, and resume playing the radio, while continuing to record the radio input. For example, the user may rewind to replay a segment of interest, and then fast-forward to continue playing the broadcast audio. [0029] The system may allow the user to skip-back or forward a preset interval, such as 30 seconds. This may allow, for example, the user to skip over commercials in recorded audio. [0030] The system may provide different speed playing. When playing at reduced or increased speeds, it may provide frequency compensation so that the sound is recognizable. [0031] Our invention may allow the user to record a portion of the radio input in memory for later playback. Recording may be based on impulse/command, based on a published schedule of radio content, based on a specific time/station, or on other criteria. Recordings may also be stored or transferred to an external analog or digital storage device. [0032] The system may provide preset stations. Stored radio programs may be available as preset stations separate from the stations from which they were recorded. [0033] This invention may allow identification of specific pieces of audio content, such as songs and commercials. The system may allow the user to indicate (e.g., by pressing a button or other control) that a piece of content has begun or ended. The system may also recognize the start or end of content based on silence, changes in audio characteristics, or other cues in the audio. For example, the system may measure the frequency and power content of the audio signal, and recognize new content based on changes in harmonic content, rhythmic content, etc. [0034] The system may recognize a piece of content that has previously been identified. The user may be allowed, for example, to name a piece of content, and to identify the type of content (song, commercial, talk, etc.) The system may create a unique signature of the audio signal of a particular piece of content, and use that signature to recognize that content on future occasions. Signatures may be created separately in an external system and downloaded from the external system into the enhanced radio system. Also, information sent either in-band with the audio or in a separate channel (e.g., over the Internet) may identify the content currently being broadcast. The system may include a separate receiver to receive the separate information signal. [0035] The system may allow the user to rate a piece of content. For example, the user may be able to specify a like or dislike for a particular song or commercial, or to indicate a level of interest. The user may also to be able to rate a specific musical artist, station, radio show, and other sets of content. The system may be configured to skip over undesirable content. [0036] Our invention may include multiple radio inputs. The radio signals from each input may be simultaneously digitized and recorded. For example, the user may be allowed five favorite stations in a system with six tuners. In this way the system may always be recording the favorite stations and the most recently tuned station in addition to whatever station the user is currently listening to. The user may tune to any of the favorite stations at any time, and be able to rewind to content that may have been otherwise missed. For example, the user could tune to a station in the middle of a song and immediately rewind to the beginning of the song, as the audio from the song has previously been digitized and stored to memory. Similarly, the user could rewind to hear a traffic or weather report that was missed, clues and phone number for a radio contest, details in an ad of interest, or any other content of interest. Our invention may also provide a scan feature, briefly playing audio from the available radio stations in sequence, allowing the user to stop when something of interest is heard, and allowing the user to skip-back to the start of the item of interest. [0037] The system may provide an alert when content of interest is being played on a different station. For example, when a favorite song or artist is played on a station other than the current station, the system may notify the user, who could tune to that station and rewind to the beginning of the song. The system may provide a single button to tune to the station with the most recent content of interest notification. Alternatively, the system may automatically change to the station with the content of interest, and may automatically rewind to the start of the content. [0038] The system may compare information about the user's likes and dislikes with information about radio stations to create recommendations. The user may enter information about her likes and dislikes, or this information may be obtained automatically by monitoring the content she listens to. For example, a recommendation may be provided in any of the following ways: there may be a list of stations that the user can choose from; the system may automatically set one or more presets based on the recommendations; or the system may automatically tune to the recommended stations. [0039] Our invention may obtain information about stations in a number of ways. For example, the information may be sent in-band with the radio signal or delivered concurrently but over a separate communications channel. Information may be downloaded into the system from a database of station characteristics using, for example, a wireless Internet connection. Such a database may include, for example, stations, format, geographical reach, program schedules, etc. The system may monitor the content of the prospective station and compare its content with the signatures of the content the user has rated. [0040] Radio recommendations might be especially useful to a traveling user who is not familiar with local stations. For example, these features may be built into a portable enhanced radio system. A rental car radio may be equipped with an enhanced radio system including these features. A user may insert a smart card or other device into the radio to indicate preferences, and the system may automatically determine the best matching local stations. Such a system may, for example, set the presets, automatically tune, record, or otherwise make the recommended content available to the user. The system may include a global positioning system (GPS) unit to determine the user's current location as an index into a database of radio stations, and then scan the database for stations matching the user's criteria. The system may alternatively scan radio stations using a tuner other than the one the user is currently listening to, and compare the content on each station with signatures indicating the user's preferences. [0041] The system may provide automatic notification of local concerts, performing artist appearances, signings, radio station events, weather, and other events of interest. This information may be of interest to all types of users, including those users who are traveling in an unfamiliar region. Similarly, the system may provide information about local music venues, stores, and other facilities and businesses. [0042] Our invention may include a communications device, such as a radio frequency transceiver, modem, portable memory device, or networking equipment. This device may be used to allow the system to download a user's profile, download radio station data, and synchronize information between a user's different enhanced radio systems in different locations. The device may be used to update the software in the enhanced radio system, to download songs into the enhanced radio system, and to report usage information to a ratings service. The system may, for example, use the user's telephone or mobile phone as a link to access remote data. [0043] The user may have multiple enhanced radio systems, to be used in different environments. All of the user's various enhanced radio systems may be synchronized. For example, likes, dislikes, and presets may be exchanged between the systems. Synchronization may be Internet based, for example, by allowing the user to upload data from an enhanced radio system to a web site, and to download data from the web site to another enhanced radio system. [0044] The user may access an enhanced radio web site using a web browser. The web site may provide features such as a shopping for CDs and other products, concert information and ticket buying, trivia questions, contests, music information databases, etc. The web site may provide a computer desktop radio feature, allowing the user to listen to radio on a personal computer while connected to the Internet. The Internet website may also have advertisements, which may be based on user preferences, either as determined by the web site, or as uploaded from an enhanced radio system. [0045] The web site may also include access to radio station databases and schedules, which may be downloaded to an enhanced radio system. Data may be loaded into a mobile phone or personal digital assistant, which may be used to load information into an enhanced radio system in, for example, a rental car. Data may include such information as station names and frequencies, formats, play lists, signatures, schedules, geographical reach, etc. [0046] A two-way communication feature may be included as part of an enhanced radio system and may provide a number of advantages. For example, the user may be able to respond directly to radio advertisements without having to telephone, or the system may auto-dial a mobile telephone to a phone number included in the advertisement. Similarly, the user may respond to contests and call-in shows, and make requests, either directly using the two-way communication feature, or the system may auto-dial the radio station to support these features. The auto-dialed phone number may be hand-entered by the user, part of the radio station database, or included in information sent as part of or separately from the radio signal. In addition, the user may buy CDs, buy concert tickets, participate in live chats, and other features. The user may select these features using a voice command or other types of controls. [0047] The system may also incorporate telephone functions. The system may connect with a mobile telephone or a wired telephone service. The system may provide telephone audio using the enhanced radio's voice input and audio output. The system may automatically pause or mute the radio audio while a call is in progress. [0048] The system may allow one enhanced radio user to send an instant message or other electronic message to another enhanced radio user. The message may, for example, be text, voice, or a combination. The message may include all or part of content from a radio station, such as a song. The message may be otherwise related to radio content, for example including a link allowing the recipient to easily tune to a specific station or show. It may include, for example, a signature of a specific song. The message may be, for example, an invitation to a concert or other event. [0049] The system may also provide a karaoke mode. In this mode, it may remove the vocal component from the audio signal as it is being played. It may also display lyrics of a song as it is being played. [0050] Information may be loaded into an enhanced radio system by any number of methods. For example, information may be received (and sent) over a wireless link, such as a wireless telephone or paging link. Information may be loaded via prerecorded media, such as a compact disk or digital versatile disk. Information may be loaded from a smart card, PC Card, or other portable memory device. Information may be received and sent via a telephone link. Information may be exchanged over the Internet. Information may be entered by hand. BRIEF DESCRIPTION OF THE DRAWINGS [0051] Further features of our invention, its nature and various advantages will become more apparent upon consideration of the following detailed description, taken in conjunction with the accompanying drawings, in which like reference characters refer to like parts throughout, and in which: [0052] FIG. 1 is an illustrative block diagram of one embodiment of the enhanced radio system of the present invention; [0053] FIG. 2 is an illustrative block diagram of the controller of FIG. 1; [0054] FIG. 3A is an illustrative block diagram of radio sources of FIG. 1; [0055] FIG. 3B and FIG. 3C are further illustrative block diagrams of alternative embodiments of a portion of FIG. 1; [0056] FIG. 4 is an illustrative block diagram of the communications device of FIG. 1; [0057] FIG. 5A and FIG. 5B are illustrative flow charts of one embodiment of the enhanced radio method of the present invention; [0058] FIGS. 6A through 6D are illustrations of various embodiments of the enhanced radio system of the present invention; [0059] FIG. 7 is an illustrative flow chart showing configuration steps of the enhanced radio method of the present invention; [0060] FIG. 8 is an illustrative flow chart showing additional configuration steps of the enhanced radio method of the present invention; [0061] FIG. 9 is an illustrative flow chart showing audio control steps of the enhanced radio method of the present invention; [0062] FIG. 10A and FIG. 10B are illustrative flow charts showing steps relating to recording of radio content using the present invention; [0063] FIG. 11 is an illustrative flow chart showing steps related to allowing audio content to be downloaded into the enhanced radio system of the present invention; [0064] FIG. 12 shows an illustrative display screen that may be used for recording radio content in the enhanced radio system of the present invention; [0065] FIG. 13 is an illustrative flow chart showing steps related to selecting favorite radio stations in the present invention; [0066] FIG. 14 and FIG. 15 are illustrative flow charts showing steps related to identifying an item of radio content in the enhanced radio system of the present invention; [0067] FIG. 16 is an illustrative data structure that may be used in the identification of an item of radio content in the enhanced radio system of the present invention; [0068] FIGS. 17A through 17C are illustrative graphs of data that may be used to identify items of radio content in the enhanced radio system of the present invention; [0069] FIG. 18 and FIG. 19 are illustrative flow charts showing steps related to grouping items of radio content in the enhanced radio system of the present invention; [0070] FIG. 20 is an illustrative display screen that may be used in the rating of groups of radio content in the enhanced radio system of the present invention; [0071] FIG. 21 through FIG. 24 are illustrative flow charts showing steps related to recommending radio stations in the enhanced radio system of the present invention; [0072] FIG. 25 and FIG. 26 are illustrative data structures that may be use in the enhanced radio system of the present invention; [0073] FIG. 27 is an illustrative display screen that may be used in the recommending of radio stations in the enhanced radio system of the present invention; [0074] FIG. 28A and FIG. 28B are illustrative flow charts showing steps related to recommending local events and facilities in the enhanced radio system of the present invention; [0075] FIG. 29A and FIG. 29B are illustrative display screens that may be used in the recommending of local events in the enhanced radio system of the present invention; [0076] FIG. 30 is an illustrative flow chart showing steps related to communication features in the enhanced radio system of the present invention; [0077] FIG. 31 is an illustrative display screen that may be used in an enhanced radio web site in the enhanced radio system of the present invention; [0078] FIG. 32A and FIG. 32B are illustrative block diagrams showing how a portable device may be used with a computer and the enhanced radio system of the present invention for downloading data; [0079] FIGS. 33A through 33C are illustrative display screens that may be used in a radio response feature in the enhanced radio system of the present invention; [0080] FIG. 34 is an illustrative flow chart showing steps related to providing a radio response feature in the enhanced radio system of the present invention; [0081] FIG. 35 is an illustrative flow chart showing steps related to providing a user message feature in the enhanced radio system of the present invention; [0082] FIGS. 36A through 36F show illustrative display screens that may be used in providing a user message feature in the enhanced radio system of the present invention; [0083] FIG. 37 is an illustrative flow chart showing steps for reporting radio usage data in the enhanced radio system of the present invention; [0084] FIG. 38 is an illustrative flow chart showing steps for providing a karaoke mode in the enhanced radio system of the present invention; [0085] FIG. 39 is an illustrative flow chart showing steps for integrating radio and telephone functions in the enhanced radio system of the present invention; [0086] FIG. 40 is an illustrative flow chart showing steps for providing a scan feature in the enhanced radio system of the present invention; [0087] FIG. 41 is an illustrative memory map for one embodiment of the enhanced radio system of the present invention; and [0088] FIG. 42 is an overview of the features of our invention. DETAILED DESCRIPTION [0089] Our invention is such an enhanced radio system. As described above, it provides many functions not available in radios today. An overview of out invention is shown in FIG. 42. [0090] Radio listener 4202 may have access to many new features. Multiple radio stations 4204 from one or more radio sources may be available. Multiple receivers 4206 may simultaneously receive the multiple radio stations 4204, and store them digitally into buffers 4208 in computer digital storage device 4209, storing the most recent several minutes of each. One of the buffers may be used to provide an audio output 4210 for the listener 4202. The listener may choose a subset of the available radio stations 4204 and assign them to presets 4216, and the system will continuously monitor those favorite stations, storing recent content from each into buffers 4206. The system may continuously monitor the most recently listened station or stations 4215, storing recent content from each into buffers 4206. And the system may allow the listener to scan through all available stations, while tuning ahead to each before it is played for the listener, and storing its content into the one of the buffers 4206. The listener can use audio controls 4212 on the audio from any station as it is played. The listener may pause and resume play. The listener can skip back to earlier content, even content that was broadcast prior to when the user started listening to the station. And the listener can skip forward over content that is not of interest. [0091] The listener may record songs 4218 and other content from the radio and replay them later, or download songs from other sources. The listener can rate songs 4248. At a later time, the system may use the listener ratings to act on songs and other content that are broadcast. If a song that the listener likes 4246 is broadcast on a station that the user is not listening, the system may notify the user or automatically switch to the song, and the listener can hear the song from the beginning. If a song that the listener does not like 4247 is broadcast, the system may automatically skip over it. The system may provide a karaoke mode 4240, allowing the listener to sing along with a song. [0092] The system may interface with a telephone 4244. The telephone 4244 may use the radio's speakers and microphone. The radio broadcast may be automatically muted or paused when a call is in progress. The listener can send messages 4242 to other listeners and receive messages from other listeners, and the messages 4242 may include text, voice, and content recorded from the radio. The listener can respond to radio content, such as contests 4224, commercials, call-in shows, pledge drives, and other radio content. When traveling 4220, the system may recommend radio station, local events, and local facilities. The listener may be able to access features of this invention on the Internet 4226, including setting preferences, and downloading a listener profile. [0093] The enhanced radio system may be accessed in any location where the listener wishes to listen to radio. This may include at home 4228, at the office 4230, in the shower 4232, on the go 4234, in the car 4236, or in the boat 4238. Listener preferences and profiles may follow the listener wherever he goes. Listener actions may be reported to a radio rating service 4222, to collect information on what radio content and features are most popular. [0094] Turning to FIG. 1, an embodiment 10 of our enhanced radio system (ERS) invention is shown. One or more radio sources 100 may be supported. These sources may be broadcast radio, satellite radio, Internet radio, or other such sources. A radio receiver 110 is provided to receive the input signals from each source. This may be, for example, an antenna and a tuner. It may also be equipment to receive audio data from the Internet, and may include a telephone, wireless, or cable modem, a computer, and software. Multiple radio receivers may be provided for a single radio source. For example, the system may include one antenna and several tuners. [0095] One or more digitizers 115 may be provided for each analog input. These digitizers convert the received analog audio signal into a stream of digital data that can be stored in a memory device 120. A digitizer is not required for digital audio sources, such as Internet and digital satellite radio. Multiple radio receivers may share a single digitizer. The output of the digitizer 115, or the output of digital radio receivers 110, may be stored in memory 120. Memory 120 may be any suitable memory device, such as random access memory, static memory, disk drive, or other suitable electronic, magnetic, optical or other storage device. [0096] The functions of the radio receivers 110 and digitizers 115 may be controlled by a controller 145. The controller 145 may have memory to store software and a processor to run software. The controller 145 may receive user commands from user controls 140 and display information for the user on optional display device 150. In embodiments in which the radio receiver 110 has a processor, such as to receive Internet radio, controller 145, user controls 140, and display device 150 may be included with radio receiver 110. [0097] The user may also direct controller 145, using user controls 140, to send digital audio data from memory 120 to digital-to-analog converter 125, and to send audio signals from digital-to-analog converter 125 to audio output 130. Audio output 130 may include, for example, amplifiers, speakers, headphones, and the like. User controls 140 may include buttons, knobs, a remote control, a voice input device, or any combination of these and other types of inputs. [0098] The system may also include optional communications device 155. This may include, for example, a modem (e.g., wireless, telephone, cable, digital subscriber line (DSL), etc.), a wireless transceiver such as a paging transceiver, computer networking equipment (e.g., a router, a hub, an Ethernet transceiver, etc.), a portable memory device (e.g., a flash memory card, a smart card, a personal digital assistant (PDA), etc.), or other communications devices. Controller 145 may send and receive information from one or more external systems using communications device 155, and store this information in local memory, such as memory within controller 145. [0099] The system may include optional global positioning system device 160. This device may determine the geographic location of the enhanced radio system using the global positioning system satellites, and send that information to controller 145. [0100] FIG. 2 shows an illustrative block diagram of controller 145 of FIG. 1. This subsystem may include processor 210, which may, for example be a microprocessor or other type of processing unit. Controller 145 may include local memory 220. Memory 220 may be used for storing software 225, which may run in processor 210. Memory 220 may also be used to store data 227, which may also be used by processor 210. Controller 145 may also include additional control circuitry 230, which may be used, for example, for communication with other subsystems in enhanced radio system 10 (FIG. 1) (ERS), and to process data sent to and received from the other subsystems. [0101] FIG. 3A shows another illustrative block diagram of an ERS and multiple radio sources. This figure shows that a single system may have multiple radio sources 100 (FIG. 1) of multiple types. For example, the system may include FM radio antenna 310, AM radio antenna 312, satellite radio antenna 314, cable radio signal input 316, and Internet radio input 318. These types of radio sources are merely illustrative. An enhanced radio embodiment may include any combination of these and other types of radio sources. [0102] FIG. 3B shows an illustrative block diagram of an embodiment 320 performing the function of a portion of an ERS of FIG. 1. In particular, an example of radio source 100 is embodied in analog radio signal input 325. Radio receiver 110 and digitizer 115 are embodied in tuner 330, demodulator 332, decoder 334, and demuliplexor 336. In this embodiment, digital radio content may be received in analog radio signal input 325. Tuner 330 may tune the carrier frequency for the digital radio content. Demodulator 332 may demodulate the signal from the format modulated when broadcast. Decoder 334 may decode the particular digital encoding scheme (e.g., MPEG-2) used to carry the digital data within the signal. Demultiplexor 336 may extract the digital radio data for a particular radio station from several digital radio stations that may be multiplexed within the single carrier signal. The digital data may then be stored into memory 120. [0103] FIG. 3C shows an illustrative block diagram of another embodiment 340 performing the function of a portion of an ERS of FIG. 1. In this embodiment, radio source 100 is embodied in Internet 345, and radio receiver 110 and digitizer 115 are embodied in modem 350 and computer 355. Computer 355 may retrieve radio data from Internet 345 using modem 350. Modem 350 may be, for example, a wireless, telephone, DSL, or cable modem. Modem 350 may also be used as communications device 155. Computer 355 may store radio data in memory 120. User controls 140 may be embodied in mouse 360 and keyboard 365. Display device 150 may be embodied in monitor 370. Digital-to-analog converter 125 may be embodied in sound card 380, and audio output 130 may be embodied in speakers 385. [0104] FIG. 4 shows illustrative block diagram of communications device 155 of FIG. 1. Communications device 155 may be used by an ERS for receiving data from and sending data to external systems. Communications device 155 may include modem 410, which may be, for example, a telephone, wireless, cable, or DSL modem. Communications device 155 may include wireless transceiver 420, which may be, for example, a paging transceiver. Communications device 155 may include computer networking equipment 430, which may include, for example, appropriate Ethernet hubs, routers, Ethernet transceivers, wireless Ethernet transceivers, and the like. Computer networking equipment 430 may connect enhanced radio system to an in-home network, for example, which may in turn be used for accessing an external network, such as the Internet. Communications device 155 may include portable memory device 440, which may, for example, be a flash memory card, a smart card, a PDA, etc. Portable memory device 440 may be used for transferring data between an ERS and an eternal system. [0105] In other embodiments (not shown), communications device 155 may be included as part of radio receiver 110 of FIG. 1. For example, in an enhanced radio system that accesses Internet radio, the same communications device may be used to acquire the radio data and to communicate data to and from an external system. [0106] FIG. 5A and FIG. 5B show illustrative flow charts 500 and 550, respectively, of a process used by an ERS (FIG. 1) to acquire and play radio signals. In step 510 of FIG. 5A, an ERS may receive radio input, for example using radio receiver 100. In step 520, the radio input may be stored in memory 120. If it is determined that the signal is analog in step 511, the signal may be digitized in step 525 prior to storing it. In step 530, a user may be allowed to control the storing of radio data, using, for example, user controls 140. In step 535, older stored radio data may be overwritten. For example, the radio data may be stored in a circular buffer, and the newest data may continuously overwrite the oldest data as the newest data is written. The size of the circular buffer may be fixed, it may be variable based on available memory, or it may be controlled by the user. The size of the circular buffer may be changed over time. [0107] In step 560 of FIG. 5B, an ERS may convert the stored radio data to an analog signal, using digital-to-analog converter 125. The analog audio signal may be output in step 570 to audio output 130. The user may be allowed to control the outputting in step 580, using user controls 140. [0108] Steps 510 through 535 of FIG. 5A may occur in parallel to and independently from steps 560 through 580 of FIG. 5B. In other words, referring to FIG. 1, while a radio signal is being stored in memory 120, a different radio signal may be extracted from memory 120, digitized and output. The different radio signal may have been stored at an earlier time, and may have been acquired from a different radio source, and/or using a different radio receiver. Controller 145 directs radio receiver(s) 110 to receive specific sources, and directs digital-to-analog converter 125 to output a different specific set of data, based on input received from user controls 140. [0109] FIGS. 6A, 6B, 6C and 6D show four specific embodiments of an ERS. FIG. 6A shows an enhanced radio embodiment 600 configured to be used in an automobile. Enhanced radio unit/front panel 610 may be mounted in the automobile dashboard 605 and connected to the automobile antenna 606 and sound system 608 (e.g., amplifiers and speakers). Front panel 610 may include a variety of buttons and other controls, such as volume controls 612, tuning controls 614, AUDIO button 616, SOURCE button 618, SCAN button 620, SEARCH button 622, and PRESET/NUMBER buttons 624. Front panel 610 may also include REWIND button 626 for rewinding radio content, PAUSE button 628 for pausing radio play, FAST-FORWARD button 630 for fast-forwarding through radio content, SKIP-BACK button 632 for skipping back to earlier radio content, PLAY button 634 for resuming radio play, SKIP-FORWARD button 636 for skipping forward to later radio content, LIKE button 638 for indicating preferred radio content, DISLIKE button 640 for indicating radio content that is not preferred, and RECORD button 642 for recording radio content. Front panel 610 may include display 644 and voice input 648. Any of these controls may also be available on a remote control (not shown). Front panel 610 may also include connector 646 for communications device 155 (FIG. 1). Connector 646 may be, for example, a connector for a mobile telephone, or a PC Card slot for a memory card. [0110] FIG. 6B shows an enhanced radio embodiment 650 configured to be used portably. It includes a main unit 652, which may include controls 654 and mounting means 656. Controls 654 may be substantially similar to controls shown in FIG. 6A. Mount may be configured, for example, to attach to a user's clothing. Embodiment 650 may also include speakers (e.g., headphones) 658, antenna (not shown), and connection 659 (e.g., wireless or wired) for sending audio signals from main device 652 to speakers 658. It may also include connector 662 for connecting to communications device 155 (FIG. 1). Connector 662 may be, for example, a telephone connector or an Ethernet connector, or a PC Card slot for a memory card. Embodiment 650 may alternatively contain communications device 155, which may be, for example, an infrared transceiver or a radio frequency transceiver. [0111] FIG. 6C shows an enhanced radio embodiment 670 configured to be used in an environment such as a home or office. Embodiment 670 may include main unit 672, which may include front panel 674. Remote control 676 may also be used. Main unit 672 may be connected to speakers 678, recording device 680, antenna 684, or other components of a home entertainment system. Subsystems such as amplifiers and speakers may be incorporated into the enhanced radio system main device, or they may be external to it, allowing a user to connect to existing equipment. Embodiment 670 may also include connector 682 for connecting to communications device 155 (FIG. 1). Connector 662 may be, for example, a telephone connector or an Ethernet connector, or a PC Card slot for a memory card. Embodiment 670 may alternatively contain communications device 155, which may be, for example, an infrared transceiver or a radio frequency transceiver. [0112] FIG. 6D shows an enhanced radio embodiment 690 configured to be used in a shower 692. Embodiment 690 may be design to be resistant to the heat and moisture found in a shower. It may include keypad 694, display 698 and communications device 696. Other components may be sealed inside of the unit. For example, embodiment 690 may include a clock 699. [0113] FIG. 7 shows process 700 for configuring the enhanced radio system for different environments. In step 710, the system may be configured to be used in a stationary environment, such as a home or office. This may include allowing the system to be connected to a user's home entertainment system. It may include higher quality sound components than might be used in a more mobile environment. It may also include a design that is suited for placement on a shelf, in a rack, in a home entertainment console, or the like. In step 715, the system may be configured to be used in a shower. This may include designing the system to be resistant to heat and moisture. In step 720, the system may be configured to be used in an automobile. This may include configuring the system to be mounted in a car's dashboard and to be connected to a car audio system. It may also include configuring the controls for the convenience of a driver, such as having buttons that are easy for a driver to see and activate, or including a voice control. In step 730, the system may be configured to be portable. This may include using light components and designing for durability. It may also include a mounting system that can be worn, and the ability to connect to headphones or other portable speaker systems. [0114] In step 740, the user may configure the system to be used in multiple environments, so that, for example, a single enhanced radio system may be used both portably or in the car, or in the car or at home. The steps in this process may be performed in any order, and all steps are optional. [0115] FIG. 8 shows more details of step 740 of FIG. 7. In step 810, the user may be given the ability to change the output device. For example, the user may be able to easily disconnect the headphones and connect a main device to a car audio system, to convert a system from a portable environment to the car environment. In step 820, the user may be given the ability to change the user input device. For example, the user may be able to use a front panel in one environment and a remote control in another. In step 830, different mounts may be provided. For example, the system may be mounted both in an automobile dashboard and on the user's clothing. In step 840, the user may be allowed to change the communications device. This may include, for example, connecting to a mobile telephone modem in an automobile and connecting to an in-home network at home. In step 850, the user may be given the ability to connect to different radio sources. For example, the user may connect the system to a car antenna when the system is mounted in a car, and may connect the system to a home network and a cable radio system when using the system at home. The steps in this process may be performed in any order, and all steps are optional. [0116] The enhanced radio system may also be implemented as components in a modular personal network system, as disclosed in concurrently filed U.S. Patent Application “Modular Personal Network,” by Michael D. Ellis and Caron S. Ellis, which is hereby incorporated by reference in its entirety. In that invention, multiple personal devices may be connected via a wireless network. Devices may be added or removed to change the functions of the system. For example, a radio receiver and digitizer may be one individual network component. The controller and memory may be another individual network component. Other individual network components may also include user controls, display device, and digital-to-analog converter/audio output. In such embodiments, the user may change individual network components to use the invention in different environments. For example, the user controls for a portable enhanced radio system may be worn on the person, while the user controls for a car enhanced radio system may be mounted in the car. Similarly, the audio output for the personal enhanced radio system may be portable headphones, while in the car the car's audio system may be used. In such embodiments, software, audio, and other data may be downloaded into the system from a base station or personal computer. [0117] An ERS may allow a user to control the outputting of the radio signal. FIG. 9 shows process 900 for providing user control of the radio output, and is illustratively discussed in conjunction with the block diagram of FIG. 1 and the embodiment of FIG. 6A. The steps in this process may be performed in any order, and all steps are optional. In step 910, the user may be allowed to pause the radio output, for example by pressing PAUSE button 628. The system may temporarily cease sending an audio signal to audio output 130. In substep 912, the system may continue to store the incoming radio signal to memory 120. This may allow the user to listen to that radio content at a later time. [0118] In step 920, the user may be allowed to play or resume the radio output, for example by pressing PLAY button 634. The system may resume sending an audio signal to audio output 130, and may resume from the same point at which the user earlier paused. In substep 922, the system may continue to store the incoming radio signal to memory 120. This may allow the user to “catch up” to the current radio content at a later time. [0119] In step 930, the user may be allowed to skip-back to earlier radio content, for example by pressing SKIP-BACK button 632. This feature may allow the user to skip-back to the start of a song, traffic report, weather report, or other radio content of interest, to listen again to a phone number or clue for a radio contest, to hear public radio pledge information again, or to repeat any other content of interest. The system may immediately begin sending audio signal to audio output 130 corresponding to audio that was stored at a time earlier than the audio signal currently being sent to audio output 130. The amount of time to skip-back may be user-specified, as in substep 932. For example, the user may be able to choose between skipping back 5, 10, or 30 seconds. The amount of time to skip-back may be predetermined by the enhanced radio system, as in substep 934. For example, the enhanced radio system may always skip-back 10 seconds. The amount of time to skip-back may be content-specific, as in substep 936. For example, the enhanced radio system may always skip-back 15 seconds during commercials and 30 seconds during songs. Or, the enhanced radio system may always skip-back to the start of the currently playing content. The choice of which substep to perform may be user selected or factory defined. [0120] In step 940, the user may be allowed to skip-forward to later stored radio content, for example by pressing SKIP-FORWARD button 636. This feature may allow the user to skip to the end of a commercial, public radio pledge drive solicitation, or other radio content not of interest. The system may immediately begin sending audio signal to audio output 130 corresponding to audio that was stored at a time later than the audio signal currently being sent to audio output 130. The amount of time to skip-forward may be user-specified, as in substep 942. For example, the user may be able to choose between skipping forward 5, 10, or 30 seconds. The amount of time to skip-forward may be predetermined by the enhanced radio system, as in substep 944. For example, the enhanced radio system may always skip-forward 30 seconds. The amount of time to skip-forward may be content-specific, as in substep 946. For example, the enhanced radio system may always skip-forward 15 seconds during commercials and 30 seconds during songs. Or, the enhanced radio system may always skip-forward to the end of the currently playing content. The choice of which substep to perform may be user selected or factory defined. [0121] In step 950, the user may be allowed to rewind the radio content, for example by pressing REWIND button 626. This feature may allow the user to listen to a song or other radio content of interest again. The system may immediately begin sending audio signal samples in reverse order to audio output 130 corresponding to audio that was stored at a time earlier than the audio signal currently being sent to audio output 130. The user may be allowed to rewind at multiple speeds, as in substep 952. For example, if the user presses REWIND button 626 a second time, the system may change to a faster rewind speed, cycling through the available rewind speeds as the user repeatedly presses REWIND button 626. The audio signal samples may be chosen further apart and/or the audio signal samples may be shorter in duration if the user chooses a faster rewind speed. The system may provide frequency compensation in substep 954, so that the audio signal samples are recognizable by the user even if played at a different speed than they were recorded at. The system may stop rewinding when the user presses REWIND button 626 again after accessing all available rewind speeds. Alternatively, the system may stop rewinding when the user presses PLAY button 634 or PAUSE button 628. [0122] In step 960, the user may be allowed to fast-forward the radio content, for example by pressing FAST-FORWARD button 630. This feature may allow the user to quickly get through a commercial or other radio content not of interest. The system may immediately begin sending audio signal samples at a higher rate in forward order to audio output 130 corresponding to audio that was stored at a time later than the audio signal currently being sent to audio output 130. The user may be allowed to fast-forward at multiple speeds, as in substep 962. For example, if the user presses FAST-FORWARD button 630 a second time, the system may change to a faster fast-forward speed, cycling through the available fast-forward speeds as the user repeatedly presses FAST-FORWARD button 630. The audio signal samples may be chosen further apart and/or the audio signal samples may be shorter in duration if the user chooses a faster fast-forward speed. The system may provide frequency compensation in substep 964, so that the audio signal samples are recognizable by the user even if played at a different speed than they were recorded at. The system may stop fast-forwarding when the user presses FAST-FORWARD button 630 again after accessing all available fast-forward speeds. Alternatively, the system may stop fast-forwarding when the user presses PLAY button 634 or PAUSE button 628. [0123] In step 970, the user may be allowed to slow-play the radio content, for example by pressing PLAY button 634 while the system is playing radio content at normal speed. This feature may allow the user to listen more closely to radio content of interest, or to more precisely find a point of interest in the content. The system may immediately begin sending audio signal samples at a slower rate in forward order to audio output 130 corresponding to audio that was stored at a time later than the audio signal currently being sent to audio output 130. The user may be allowed to slow-play at multiple speeds, as in substep 972. For example, if the user presses PLAY button 634 again while already slow-playing, the system may change to a slower slow-play speed, cycling through the available slow-play speeds as the user repeatedly presses PLAY button 634. The audio signal samples may be chosen closer together and/or the audio signal samples may be longer in duration if the user chooses a slower slow-play speed. The system may provide frequency compensation in substep 974, so that the audio signal samples are recognizable by the user even if played at a different speed than they were recorded at. The system may stop slow-playing when the user presses PLAY button 634 again after accessing all available slow-play speeds. Alternatively, the system may stop slow-playing when the user presses PAUSE button 628. The system may also allow the user to slow-play in the reverse direction, for example, as one or more additional rewind speeds. [0124] While the system is rewinding, fast-forwarding, or slow-playing, the system may continue to store new radio content to memory 120. This may allow the user to “catch up” to the current radio content at a later time. [0125] The system may allow the user to record a portion of the radio input in memory 120 (FIG. 1) for later playback. FIG. 10A shows process 1000 for recording radio content for the user, and is illustratively discussed in conjunction with the embodiment of FIG. 6A. The steps in this process may be performed in any suitable order, and steps may be omitted if desired. In step 1010, the user may be allowed to specify the content to be recorded. In step 1020, the system may record the content in memory 120. For example, the content may be copied from the circular buffer into a separate area of memory 120. This may involve copying more than one block of memory, if the content of interest spans the start and end of the buffer in memory, or if the circular buffer is implemented with multiple blocks of memory. [0126] In step 1030, the user may be allowed to select the recorded content as a “preset” station. If an ERS includes a “preset station” feature, allowing a set number of radio stations to be quickly tuned, e.g., at the touch of a single PRESET button 624, the system may allow the recorded content to be saved as one of the presets. In other words, the content may later be replayed at the touch of a single PRESET button 624. [0127] Even if recorded content is not saved as a preset, the system may allow the user to replay the recorded content at a later time in step 1040. For example, the system may present a list of previously recorded radio content items. If the user selects an item from the list and presses PLAY button 634, the system may begin playing the content item as if it were currently being broadcast. Controls such as pause, skip-back, skip-forward, etc., may be allowed while the content item is being played. Upon reaching the end of the recorded content item, the system may stop, may automatically begin playing the content item from the beginning, may return to the most recent radio station, or another appropriate action. [0128] In step 1050, the user may be allowed to store the content item to an external recording device. This may include, for example, recording device 680 shown in embodiment 670 of FIG. 6C. The external recording device may be, for example, a cassette recorder, a CD recorder, or other device capable of storing analog or digital audio. This feature may allow the user to maximize use of the limited memory 120, while saving a more permanent copy of the desired radio content. [0129] FIG. 10B shows more details of step 1010, allowing the user to specify the content to be recorded. The steps in this process may be performed in any order, and all steps are optional. In step 1012, the user may be allowed to specify the start and end of the content to be recorded. For example, the user may rewind to the start of the content of interest using REWIND button 626 or SKIP-BACK button 632, and then press RECORD button 642 to indicate the start of the content to be recorded. The user may then use the PLAY button, 634, FAST-FORWARD button 630 or SKIP-FORWARD button 636 to find the end of the content of interest, and then press RECORD button 642 again to indicate the end of the content to be recorded. [0130] In step 1014, the user may be allowed to indicate any point during a radio item of interest, for example by pressing RECORD button 642. The system may automatically determine the start and end of the content of interest using audio cues. Audio cues may be algorithmically determined points in the audio content, based on, for example, silence in the audio, changed frequency content of the audio, changed power content of the audio, and changed rhythmic content of the audio, combined with the length of the audio segment. Refer to discussion of FIG. 15 below for more details on audio cues. Cues may have already occurred and may be extracted from radio data stored in memory 120. Cues may also occur at some time after the user indicates the item to be recorded. The system may also use a combination of steps 1012 and 1014, allowing the user to specify one end point of the content to be recorded and determining the other automatically. [0131] In step 1016, the user may be allowed to specify a radio station, and start time, and an end time. Instead of an end time, the user may be allowed to specify duration. For example, if an ERS includes a computer monitor 370, keyboard 365, and mouse 360, as shown in embodiment 340 of FIG. 3C, the system may present a list of radio stations on monitor 370, allow the user to select a station with mouse 360, and then allow the user to type the start and end time using keyboard 365. [0132] In step 1018, the user may be allowed to select an item from a schedule of radio programming to be recorded. For example, the system may display a list of stations on monitor 370 and allow the user to select one with mouse 360. The system may then display a list of programs scheduled on the selected station, and allow the user to select one of the programs for recording. [0133] In FIG. 11, flow chart 1100 shows an illustrative process for downloading audio content into an ERS, and is illustratively discussed in conjunction with the block diagram of FIG. 1 and the embodiment of FIG. 6A. This process may allow the user to incorporate some favorite songs into the system and play them instead of a radio station at any time, using the resources of the enhanced radio system. The user does not need to purchase a separate recorded music player. In step 1110, the user may be allowed to download audio content, such as a song, using communications device 155. In step 1120, the audio content may be stored into memory 120. In step 1130, the system may allow the user to assign the downloaded audio content to one of PRESET buttons 624. In step 1140, the system may allow the user to replay the downloaded content. If desired, any of these steps may be omitted or performed in an alternate order. [0134] FIG. 12 shows illustrative screen 1200 that may be displayed on monitor 370 (FIG. 3) to allow the user to select an item to be recorded. Selection 1210 may allow the user to instruct the system to record the current song, as disclosed with regard to steps 1110 and 1120 of FIG. 11 above. Selection 1220 may allow the user to instruct the system to record content based on station, start time, and end time, as disclosed with regard to step 1130 of FIG. 11 above. Selection 1230 may allow the user to instruct the system to record a specific radio program scheduled to air on a specific radio station at a specific time, as disclosed with regard to step 1140 of FIG. 11 above. [0135] In FIG. 13 we present flow chart 1300, showing an illustrative process used by an ERS to support a preset station feature, illustratively discussed in conjunction with the block diagram of FIG. 1 and the embodiment of FIG. 6A. The steps in this process may be performed in any suitable order, and any steps may be omitted if desired. In step 1310, the system may allow a user to select one or more radio stations as favorites. The user may, for example, press and hold one of five PRESET buttons 624 to set the currently playing radio station as one of five favorites. In substep 1312, the user may be allowed to select recorded radio content as a favorite, as discussed previously in conjunction with flow chart 1000 of FIG. 10. In substep 1314, the system may treat one or more recently tuned stations as a favorite station. For example, the system may keep track of the most recently tuned one or two stations. [0136] In step 1320, the user may be allowed to quickly tune to a favorite radio station. If a radio station was selected as a preset station in step 1310 above, the user may allowed to quickly select that station by pressing the same PRESET button 624 that was used to select it as a favorite. If a user has selected recorded content, such as a song, as one of the favorites, then the user may be allowed to quickly access that content by pressing the corresponding one of PRESET buttons 624. The system may also have a button (not shown) to quickly access a recently tuned radio station. [0137] In step 1330, an ERS may continuously store content from the favorite stations in memory 120. This may be, for example, in a circular buffer, as in substep 1332. The system may also use other data structures, such as linked lists of stored audio segments. An ERS may have one tuner allocated to each of the favorite stations, to continuously record the most recent content on that station, even while the user is listening to another station. For example, the system may include one tuner dedicated to the station that the user is currently listening to, one tuner dedicated to the most recently tuned station, and one tuner dedicated to each of six preset stations. Each of these tuners may be independently tuned to a different source and station. The input from each of these tuners may simultaneously be digitized and stored into independent areas of memory. The amount of audio data stored for each station may be the same, or it may be individually configured for each station. For example, the system may record the most recent five minutes of audio from each of six favorites, plus the most recent ten minutes of audio from the previously tuned channel, plus the most recent twenty minutes of audio from the radio station the user is currently listening to. [0138] When the user selects a different radio station and that station is one of the user's favorites or a station the user has listened to recently, the system may have in memory 120 several minutes of content prior to when the user selected the new station. In step 1340, an ERS may allow the user to listen to content broadcast prior to the time the user selected the station. For example, the user may press one of PRESET buttons 624 to switch to a favorite station, recognize the middle of a favorite song, and use SKIP-BACK button 632 or REWIND button 626 to begin playing at the beginning of the song. The system will continue to record the input from the newly selected station into memory 120, and may also continue recording the input from the previous station. [0139] The system may also keep track of user radio preferences, and may have the ability to recognize specific content items, such as songs, that the user may like. In step 1350, the system may monitor favorite stations (e.g., preset stations and recently tuned stations) for content of interest, i.e., content that matches the user's preferences. This may include step 1352 in which the user is allowed to specify content preferences. For example, a user may specify specific songs, artists, radio shows, types of content (e.g., traffic or weather reports), categories of music, or other content, and specify a level of like or dislike for that content. For example, the user may press LIKE button 638 or DISLIKE button 640 while a song is playing to indicate a preference for or against the song. In an embodiment with a personal computer, the system may present a screen such as screen 2000 of FIG. 20, discussed below, to enable the user to specify content preferences. User preferences may be loaded using communications device 155. The system may also determine user preferences automatically by monitoring what content the user listens to. [0140] In substep 1354, the system may recognize content of interest on one of the monitored radio stations. This may be based on a number of factors including a schedule of events for the monitored station, identification information sent with the radio content, or matching a stored “audio signature” against the incoming content. An audio signature may be created, for example, by sampling the power level of 16 different frequencies at several different offsets from the start of the song. A method of creating and recognizing audio segments using an audio signature is disclosed in U.S. Pat. No. 5,612,729 (1997) to Ellis et al., “Method and system for producing a signature characterizing an audio broadcast signal,” which is hereby incorporated by reference herein in its entirety. [0141] At fixed intervals, e.g., thirty times per second, the system may calculate a 16-bit signature value representative of the audio at that point in time. Each of the 16 bits may represent whether the power level of a specific frequency band is increasing or decreasing at that point in time. The system may also generate a 16-bit mask value at each of the same times, with each bit in the mask value determining whether the corresponding bit in the signature word is considered reliable. [0142] To create a signature for a song, the system may take a number of signature/mask pairs at various offsets from the start of the song. One of the signature words may be considered the “keyword,” and may be selected based on providing the most likely correct match. The system may store the offset of the keyword from the start of the audio segment. Additional signature/mask pairs may be stored, along with their offsets relative to the keyword. Keywords and other signature words may be selected based on run length (how long the signature word is constant), how quickly the signature values change at the end of the run, number of mask bits set, similarity to other signatures, avoiding the start and end of the segment, and other factors. [0143] To recognize incoming audio, the system may compare signature words from the incoming digitized audio against the keyword for all segments of interest. When a keyword match is found, the system may then compare the other signature words from the song of interest with the signature words in memory corresponding to the incoming audio signal, at the appropriate signature offsets from the matching keyword. If an acceptable level of matching of the complete signature is found, then a match is reported. [0144] Assuming that the signature words are distributed fairly evenly throughout the song, the song cannot be recognized until after most of the song has been broadcast. However, because the audio for the past several minutes is stored in memory 120, the user will be able to listen to the song from the beginning after switching to it. [0145] This method of using audio signatures to recognize incoming content is merely illustrative. Other methods may be used for audio signature creation and matching. [0146] After the system recognizes an item of interest, the user may be notified in step 1360. The notification may include the name or other information about the content, or it may just indicate that something of interest has been found. For example, an audio notification may be sent to audio output 130. Alternatively or in addition, a message may be displayed on display device 150. The notification may also indicate that the user may quickly switch to the content of interest, for example by pressing a button, as in step 1362. After the user switches to the new station, the system may allow the user to skip-back to the start of the content of interest, as in step 1364, for example using SKIP-BACK button 632. Alternatively, the system may automatically skip-back to the start of the content of interest when the user selects it, as in step 1366. [0147] After the system recognizes an item of interest, it may automatically switch the audio output to the station that broadcast the content in step 1370. In step 1372, the user may be allowed to skip-back to the start of the content of interest, for example using SKIP-BACK button 632. Alternatively, in substep 1374, the system may automatically skip-back to the start of the content of interest after automatically switching to the station that broadcast it. [0148] The system may support identification of specific pieces of audio content, such as songs and commercials. FIG. 14 is a flow chart of process 1400 for identifying and tracking items of audio content. The steps in this process may be performed in any order, and all steps are optional. In step 1410 an item of audio content is first identified. This identification may be based on user indication or on cues in the audio, as discussed in more detail with respect to FIG. 15 below. In step 1420, the item of audio content may be stored, as described in conjunction with FIG. 10 above. [0149] In step 1430, the user may be allowed to enter information about the audio item. For example, this may include the type of content (song, commercial, weather report, etc.), the name of the item, the artist (for example, if the item is a song), and the advertiser (for example, if the item is a commercial). In step 1440, the system may acquire information about the item from an external source. The information acquired from an external source may be more extensive than that entered by the user, as it may be loaded from a database of detailed information about songs or other content. The information about the content may be acquired from the radio signal along with the content itself in substep 1442 (or from a separate radio signal using a separate radio receiver), it may be downloaded using a communications device 155 (FIG. 1) such as a modem in substep 1444, or it may be read from a removable portable memory device 440 (FIG. 4) in substep 1446. Whether entered by the user or acquired from an external source, the information about the content may be stored in memory 120 (FIG. 1) and associated with the stored content. [0150] The information about the content item acquired from an external source may include a unique identifier, in step 1450. For example, every song that might be played might be assigned a unique number as an identifier. The identifier may be broadcast with the song. The system can then look up that identifier in a database of song information to retrieve other information about the song. [0151] In step 1460, a unique audio signature may be associated with the content. The audio signature may be generated locally by the enhanced radio system in substep 1462, or the audio signature may be acquired from an external source in substep 1464. The audio signature may be stored with the other information about the item of content. In step 1470, the system may recognize the item of content when it is broadcast. The item may be recognized when it is broadcast on the station that the user is listening to, or it may be recognized when it is broadcast on another station that the system is monitoring. The item of content may be recognized using the previously stored audio signature, in substep 1474. Alternatively, in step 1472, the item of content may be recognized based on identification information broadcast with the item of content on the radio station or received via communications device 155 (FIG. 1). This identification information may, for example, be the previously stored unique identifier associated with the content. [0152] In step 1480, the system may allow the user to rate an item of content. For example, the user may specify that he likes or dislikes a particular song or commercial. The system may also allow the user to specify levels of interest, such as a strong like or weak preference. In step 1490, when the system recognizes an item of content that the user does not like, it may automatically skip over that content. For example, if the user is listening to a radio station a significant amount of time prior to the radio data that is being stored for the same station, the system may skip the disliked content and immediately begin playing the content stored immediately following the disliked content. Alternatively, the system may switch to a radio station with more preferred content when disliked content is recognized. In steps 1492 and 1494, the system may notify the user or automatically switch when preferred content is recognized on a station the user is not currently listening to, as discussed above with regard to FIG. 13. [0153] FIG. 15 shows more details of step 1410 of FIG. 14, identifying an item of radio content, and is illustratively discussed in conjunction with the block diagram of FIG. 3 and the embodiment of FIG. 6A. The steps in this process may be performed in any order, and all steps are optional. At 1510, the item may be identified based on a user indication. In substep 1512, the user may be allowed to indicate the start of the item, for example by pressing LIKE button 642 when listening to the start of the item. In substep 1514, the user may be allowed to indicate the end of the item, for example by pressing LIKE button 642 a second time when listening to the end of the item. The user may also be allowed to select the item from a radio schedule in substep 1516. The schedule may, for example, be displayed on monitor 370, and the user may click on a desired item in the schedule, using mouse 360. [0154] In step 1520, the system may identify an item at least partially based on its duration. In substep 1522, identification based on duration may be combined with other cues. For example, a user may indicate a single point in time during the item, and the system may identify an item based on duration incorporating the indicated point. The system may use typical durations of items based on type of content in substep 1524. For example, the system may identify commercials that are 30 or 60 seconds long. The system may identify songs that are between three and six minutes long. The system may assign probabilities to different durations or ranges of durations, and pick a duration based on other cues and the highest probability duration. [0155] In step 1530, the system may identify an item based on cues in the audio. Cues may indicate a specific short event in the audio, such as silence, in substep 1532. In some cases a brief silence may be indicative of a transition between two different content items. Alternatively, an audio cue may be determined by monitoring a characteristic of the audio for changes that may indicate different content. [0156] For example, in substep 1534 the system may monitor frequency content of the audio. The frequency content may be determined, for example, by performing a Fourier transform on the input audio waveform. When transitioning from one item of content to another, such as two songs or a song and a commercial, the frequency content may exhibit significant changes that may not typically occur within a single item. One song may be in one musical key and the following song may be in a different musical key, or a song may be followed by a commercial that is mostly speaking. [0157] In substep 1536, the system may monitor the power content of the audio. The power level, such as the peak power level or the average power level, may change from one item of content to another. For example, the average power level may be increased during a commercial. [0158] In substep 1538, the system may monitor the rhythmic content of the audio. The rhythmic content may be determined using a Fourier transform, similar to the frequency content. One song may have a strong rhythmic content that varies from the rhythmic content of a following song. Or, a spoken commercial may not have a strong identifiable rhythmic content. [0159] The different methods of identifying an item of audio content may be combined in various ways. For example, the system may identify several possible transition points between two songs, may pick the most likely based on common durations, and then may allow the user to fine tune the identification of the start and end point. [0160] FIG. 16 shows an illustrative data structure 1600 that may be used to store information about a content item. Field 1605 may store the duration (e.g., in seconds) of the item. The duration may also be measured in units of data storage required for the item, such as bytes. The record may also store a compression factor if necessary to determine how to decompress the audio data. Field 1610 may store a pointer to the stored audio content. This may be a pointer to the block of memory holding the audio data, a pointer the first block of data if the audio data is stored in multiple blocks, a list of addresses of multiple memory blocks used to store the audio data, a file name of audio data stored on a disk drive, or other such pointer. [0161] Field 1615 may store the name of the item. This may be, for example, the name of a song, the name of a product advertised, the name of a radio show or news/information segment, or a name assigned by the user. Field 1620 may store the name of the artist, for example if the item is a song. Field 1625 may store the type of content, such as whether the item is a song, commercial, news show, etc. Field 1630 may store the advertiser, if the content is a commercial. [0162] Field 1635 may store a unique identifier for the item of content. Field 1640 may store an audio signature for the item. It may alternatively store a pointer to the signature, which may be stored in a separate part of memory 120 (FIG. 1) or other memory. Field 1645 may store a user rating for the item. For example, it may indicate whether the user likes or dislikes the item, and may indicate a level of user preference. Field 1650 may store a link to a web site related to the item. Field 1655 may store a parental rating for the item, such as a content advisory. Field 1660 may store the name or identifier of one or more groups that the item may be a member of, such as music of particular type. These fields are merely illustrative, and need not be present in all embodiments. Data structure 1600 may also include other fields if desired. [0163] FIGS. 17A through 17C illustrate data related to the audio signal that may be used to identify an item and differentiate it from another adjacent item. Graph 1700 of FIG. 17A shows power 1705 vs. time 1710 for an incoming audio signal. This graph shows an initial portion 1712 of the audio with one power characteristic, a second portion 1714 of the audio with a second audio characteristic, and a third portion 1716 of the audio with a third characteristic. In this example, second portion 1714 corresponds to a period of silence, and third portion 1716 has a higher peak and average power than first portion 1712. [0164] Graph 1720 of FIG. 17B shows power 1725 vs. frequency (time) 1730 for a sample from an audio signal. The time scale of this graph highlights the rhythmic content of the audio. From this graph it can be seen that the audio signal has a significant rhythmic content at about two beats per second. Aspects of the rhythmic content of the incoming audio may remain constant through a song, and may change when another song begins. An incoming period with no music may not have a strong rhythmic content. [0165] Graph 1740 of FIG. 17C shows power 1745 vs. frequency 1750 for a sample from an audio signal. This graph is based on a shorter sample period and a faster frequency range than graph 1720. The range of frequencies sampled corresponds to the range of frequencies found in voice and music audible to human hearing. This graph shows the power present in the range of frequency bands for the audio sample. Aspects of frequency content of a song may be fairly constant during the song, and may subsequently change when another song or a commercial begins. [0166] In FIG. 18, flow chart 1800 shows an illustrative process for supporting groups of items of audio content. All steps in this process are optional, and may be performed in any suitable order. In step 1810, items of audio content may be grouped. Groups may be created by the user, programmer, or advertiser, based on a number of criteria. In step 1820, a user may be allowed to rate a group. The user may specify a like or dislike, or a level of like or dislike, for a specific group of content. The system may also monitor the content listened to by the user, and automatically determine the groups liked and disliked by the user. In step 1830, the system may automatically recognize an item in the group when it has been broadcast. For example, the system may recognize a specific item as described above, using an audio signature, unique identifier, information broadcast with the item in the radio signal, program schedule, or other means. The system may then determine the groups in which the recognized item is a member. Alternatively, the system may directly recognize the group itself, for example based on a published schedule or on information broadcast with the radio signal. In step 1840, the system may automatically skip over an item that recognized to be a member of a group that the user dislikes, when it occurs on a radio station currently being listened to by the user. For example, a parent may define a group in a child's ERS based on an unacceptable parental advisory level, and the system may be configured to skip over all content in that group. In step 1850, the system may notify the user when it recognizes an item that is a member of a group liked by the user when it occurs on a station not being listened to by the user but that is being monitored by the system. If desired, this notification may occur even when the user is performing an activity other than listening to the radio, for example when the ERS is turned off, or when the user is listening to an audio tape or compact disk. In step 1860, the system may automatically switch to the radio station broadcasting an item of interest when it is recognized on a station not being listened to by the user but that is being monitored by the system, if that item is a member of a group liked by the user. Additionally, the system may automatically skip-back to the start of the recognized item so that the user can hear it in its entirety. If desired, the automatic switching may occur even when the user is performing an activity other than listening to the radio, for example when the ERS is turned off, or when the user is listening to an audio tape or compact disk. [0167] FIG. 19 shows more detail of step 1810, the grouping of items of audio content, and is illustratively discussed in conjunction with the block diagram of FIG. 3 and the embodiment of FIG. 6A. All steps in this process are optional, and may be performed in any suitable order. In step 1905, groups may be created based on user-specified criteria. For example, the user may enter criteria using keyboard 365, mouse 360, and monitor 370. In another embodiment, the user may specify criteria using buttons on front panel 610 and display 644. Criteria may be specified using voice input 648. Criteria may also be specified by allowing the user to indicate a specific item and creating a group based on a characteristic of the item. [0168] In step 1910, a group may be based on type of content, such as grouping all commercials, all songs, etc. In step 1915, a group may be based on a category of content, such as bluegrass music, alternative rock, or other music genre. In step 1920, a group may be based on a specific performing artist, and may contain all songs performed by that artist. In step 1925, a group may be based a particular radio station, and may contain all content broadcast by that station. In step 1930, a group may be based on a specific radio show, and may contain all content broadcast in that show. In step 1935, a group may be based on a particular parental advisory level. [0169] In step 1940, a programmer may be allowed to specify a grouping. For example, a programmer may decide to highlight and group a set of songs that may appeal to a subset of their listeners. In step 1945, an advertiser may be allowed to specify a grouping. For example, an advertiser may decide to group an ad with several songs that may appeal to a targeted subset of listeners. [0170] In step 1950, other criteria may be used to specify a grouping. In step 1955, groups may be created based on multiple criteria. This may include excluding items that match a criteria, unions of items that meet specific criteria, and intersections of items that meet multiple criteria. [0171] FIG. 20 shows illustrative screen 2000 which may be displayed on monitor 370 (FIG. 3) to allow a user to configure a group. Pull-down list 2010 may allow the user to select a specific group, such as a genre of music. In this example, the user has selected alternative rock. Pull-down list 2020 may allow the user to enter a rating for the group. In this case, the user has specified that he or she hates alternative rock music. The system may allow the user to enter a preference for or against the group, as well level of interest. For example, the user may be allowed to specify a strong or weak like or dislike, or ambivalence toward the group. [0172] Selections 2030 and 2040 may allow the user to specify what the system should do when it recognizes an item from the group. Specifically, selection 2030 allows the user to specify whether the system should automatically skip items in a group that the user does not like. Selection 2040 allows the user to specify whether the system should notify the user or automatically switch stations when it recognizes an item that the user likes. [0173] FIG. 21 shows illustrative process 2100 for providing radio station recommendations to a user. All steps in this process are optional, and may be performed in any suitable order. For example, a user may be traveling in an unfamiliar region, and may be listening to the enhanced radio system in a personal or rental car. The user may wish to quickly and easily find stations that match her preferences. [0174] In step 2110 of process 2100, the system may acquire information about the user's preferences. This step is explained in more detail in FIG. 22. In step 2120, the system may acquire information about available radio stations. This step is explained in more detail below, in conjunction with FIG. 23. In step 2130, the system may select one or more recommended stations from the set of available stations, based on the user preferences. This may be done, for example, correlating the play list from each station to the list of songs, artists, and genres selected as likes and dislikes by the user, and choosing the closest match or matches. For example, a score can be created for each station by adding a value for each match to a like and subtracting a value for each match to a dislike, with each value weighted by the level of like or dislike specified by the user. A higher value may be added for a music genre match, a lower value for an artist match, and a still lower value may be added for a song match. In step 2140, the system may present one or more of the recommended radio stations to the user. This step is explained in more detail below, in conjunction with FIG. 24. [0175] FIG. 22 shows more detail of step 2110 of FIG. 21, acquiring user information. All steps in this sub-process are optional, and may be performed in any suitable order. In step 2210, the user may be allowed to enter user information. For example, a screen such as screen 2000 of FIG. 20 may be used by the user to specify likes and dislikes. In step 2220, the system may determine user information automatically by monitoring the content the user listens to. For example, the system may add points to a specific song, artist, genre, or other type of item or grouping, based on the user listening to an entire item. The system may assign additional points if the user rewinds or skips back to the start of an item to hear it in its entirety or to hear it again. The system may subtract points if the user skips over an item. In step 2230, the system may download user information. For example, the user may have entered preferences in a web site, and the system may access that web site using communications device 155 (FIG. 1) to obtain that information. The system may also download user information from another enhanced radio system that the user may have previously used. The system may alternatively load the user information from a portable memory device 440 (FIG. 4), such as a flash memory card, a smart card, a PDA, or the like. The user may have loaded the information into the portable memory device 440 from another enhanced radio system. Portable memory device 440 may be used to hold a user profile, and may be loaded into multiple enhanced radio systems as they are used by the user, so that the user' preferences may be available in each location. [0176] FIG. 23 shows more detail of step 2130, acquiring information about available radio stations, and is illustratively discussed in conjunction with the block diagram of FIG. 1. All steps in this sub-process are optional, and may be performed in any suitable order. In step 2310, the system may acquire information about available radio stations from information sent with the radio station the user is listening to. For example, information about the radio station may be embedded in the radio signal, and the system may extract that information and store it. The signal may also include information about other stations that the user is not listening to, but which may be available. The system may collect this information over time as it is sent to create a list of all available radio stations. [0177] In step 2320, the system may acquire information about available radio stations using a radio receiver not currently being used to play the station the user is listening to. For example, the system may continuously scan the radio spectrum to find each receivable station. When a station is found, the system may read any information that may be embedded in the signal identifying the name of the station, the play list, the genres of music played, etc. Alternatively, the system may stay tuned to each station it finds for a period of time and check for any signatures that may match content the user's likes or dislikes. [0178] In step 2330, the system may download a database of radio stations. The system may use communications device 155 (e.g., as shown in the block diagram of FIG. 4, modem 410, wireless transceiver 420, networking equipment 430, or portable memory 440). The system may download the database from a central server, a web site, another enhanced radio system, or other repository. The database may include, for example, a record for each radio station in the country. For each radio station, it may include the broadcast frequency, call letters, station format, list of artists and songs played (i.e., a play list), a schedule of programming, the geographical region served by the station, and any other relevant information. [0179] In step 2340, the system may use global positioning system monitor 160 to determine the user's location. The location may also be determined by other means, such as by allowing a user to enter it, or by monitoring the radio stations that can be received and comparing them against the geographical region field in the radio station database. [0180] In step 2350, the system may use the current location to filter the database of radio stations. For example, if the database includes a geographical region field for each station, the system may compare the current location with this field and exclude radio stations that do not serve the current location. If the enhanced radio system is used in a car, the system may also monitor the current route, or future routes that may be planned by the user, to determine if a radio station will be accessible for a significant period of time. [0181] FIG. 24 shows more detail of step 2140, presenting the recommended radio stations to the user. All steps in this sub-process are optional, and may be performed in any suitable order. In step 2410, the system may display a list of recommended radio stations. For example, the list may be displayed on monitor 370 (FIG. 3) or display 644 (FIG. 6A). The user may be allowed to scroll or page through the list if it does not fit on a single display screen. In step 2420, the user may be allowed to select from the displayed list of radio stations, for example using mouse 360 (FIG. 3), keyboard 365 (FIG. 3), a button on front panel 610 (FIG. 6A), voice input 648 (FIG. 6A), or remote control 676 (FIG. 6C). When the user selects an item from the list, the system may immediately switch to that station, may display more information about the radio station, may assign the radio station to one of the enhanced radio presets, or may take other suitable action. [0182] In step 2430, the system may automatically set one or more presets based on the set of recommended radio stations. For example, the system may set all available presets based on the stations which best match the user's preferences. The system may assign the single best station to a single preset. Or the system may allow the user to specify how many presets to assign automatically. [0183] In step 2440, the system may automatically begin playing audio from one of the recommended radio stations. In step 2450, the system may automatically record content from one of the recommended stations. That may include continuously monitoring the station and storing its digitalized audio to a circular buffer. [0184] FIG. 25 shows illustrative data structure 2500 for storing user preferences. It may include field 2510 for storing information about music formats the user likes. It may include field 2520 for storing information about music formats the user does not like. It may include field 2530 for storing information about talk formats the user likes. It may include field 2540 for storing information about talk formats the user does not like. It may include field 2550 for storing information about performing artists the user likes. It may include field 2560 for storing information about performing artists the user does not like. It may also include one or more fields 2570 for storing information about how the user's preferences change over time, for example if the user likes listening to different types of content on different days of the week or at different times of the day. All fields shown are optional, and other information relating to the user's preferences may be stored. If desired, the enhanced radio system may store the preferences for multiple users. [0185] FIG. 26 shows illustrative data structure 2600 for storing information about a radio station, for example in a radio station database. Field 2610 may store the station call letters or other identifying name. Field 2620 may store the format of the radio station, for example as a text string, or as a selection from a table of known formats. Field 2630 may store a list of performing artists typically played by the station. Field 2640 may include a schedule of programs airing on the radio station. Field 2650 may include information about the geographical region served by the radio station. Field 2660 may store the broadcast frequency, or other information necessary for receiving the station. Field 2670 may include the telephone number of the radio station. All fields shown are optional, and other fields may be included in the radio station database as desired. [0186] FIG. 27 shows illustrative display screen 2700 which may be used to present recommended radio stations to a user. Recommended station list 2790 may be presented to user. If more stations are recommended than will fit onto a single screen, the system may allow the user to scroll or page to view additional selections. Each selection may include information such as broadcast frequency 2710, call letters 2720, and station format 2730. Each selection may also include on-screen buttons 2740 that may be selected by the user to immediately start listening to the station, buttons 2750 to view a schedule of programming on the station, and buttons 2760 to view a play list for the station. Other items may be shown on screen 2700 as well. This screen may be displayed in different formats depending on the characteristics of display device 150 and user controls 140 of FIG. 1. [0187] FIG. 28A shows illustrative process 2800 for recommending local events to a user, and is illustratively discussed in conjunction with FIG. 1. The steps of this process may be performed in any suitable order, and any steps may be omitted if desired. In step 2805, the system may acquire user information, such as user preferences. Flow chart 2110 of FIG. 22, discussed above, shows an illustrative process for acquiring user preferences. In step 2810, the system may acquire geographic position information, for example using global positioning system monitor 160, or by monitoring which radio stations are available and comparing them with a database of radio stations and geographical regions served by them. In step 2815, the system may acquire information about local events. Events may include concerts, celebrity appearances, signings, radio station events, contests, etc. Event information may be acquired using communications device 155. In step 2820, the system may select one or more recommended events. Events may be selected by comparing information about each event with user information, and selecting events that most closely match user preferences. In step 2825, the system may present one or more recommended events to the user, for example on display device 150. [0188] FIG. 28B shows illustrative process 2850 for recommending local facilities to a user, and is illustratively discussed in conjunction with FIG. 1. The steps of this process may be performed in any suitable order, and any steps may be omitted if desired. In step 2855, the system may acquire user information, such as user preferences. Flow chart 2110 of FIG. 22, discussed above, shows an illustrative process for acquiring user preferences. In step 2860, the system may acquire geographic position information, for example using global positioning system monitor 160, or by monitoring which radio stations are available and comparing them with a database of radio stations and geographical regions served by them. In step 2865, the system may acquire information about local facilities. Facilities may include concert venues, tourist attractions, radio stations, stores, hotels, restaurants, other local businesses, etc. Facility information may be acquired using communications device 155. In step 2870, the system may select one or more recommended facilities. Facilities may be selected by comparing information about each facility with user information, and selecting facilities that most closely match user preferences. In step 2875, the system may present one or more recommended facilities to the user, for example on display device 150. [0189] FIGS. 29A and 29B show illustrative display screens 2900 and 2920 for recommending local events to a user listening to an enhanced radio system in an automobile, and are discussed illustratively in conjunction with FIG. 6A. Screen 2900 may be shown on display 644 when the user indicates a desire to find local events. The user may be prompted to press a button, such as SEARCH button 622, to begin the search. In display screen 2920, the first search result may be displayed. The Joe Jackson concert 2922 may be recommended because the user has a preference for that performing artist. The system may also display prompt 2924 to press FAST-FORWARD button 630 to advance to the next search result, and display prompt 2926 to press LIKE button 638 to view information about the event. Displayed information may include date and time, location, price, where to buy tickets, a phone number to obtain additional information, directions to the concert venue, or other appropriate information. The system may also display a prompt allowing the user to buy one or more tickets interactively. Local facility information may be similarly shown on display 644. [0190] FIG. 30 shows flow chart 3000 of a process to provide communication features in an enhanced radio system, and is discussed illustratively in conjunction with FIG. 1. Any steps from this process may be performed in any suitable order if desired. The system may use communications device 155 to provide these features. In step 3005, the system may download information about radio stations, such as a radio station database. In step 3010, the system may download a user profile, which may include user preferences and other user information. In step 3015, the system may synchronize data between two enhanced radio systems, for example by copying user preferences, station presets, and other information from one system to the other. In step 3020, the system may access an enhanced radio web site to perform functions such as retrieve data, upload data, or present a web page to the user. In step 3025, the system may download information about local events and local facilities. In step 3030, the system may allow a user to respond to radio content, such as automatically telephoning a radio station or advertiser. In step 3035, the system may allow the user to send a message to another enhanced radio user. In step 3040, the system may receive a message from another enhanced radio user and present the message to the user. In step 3045, the system may download a software update. In step 3050, the system may allow a user to download a song or other audio content to store in memory 120 and play back later. In step 3055, the system may report usage data to a central facility. [0191] FIG. 31 shows illustrative enhanced radio web page 3100. A user may be able to access web page 3100 using a web browser running on computer 355, and it may be displayed on monitor 370 of FIG. 3. Web page 3100 may include link 3105 to view concert information and purchase concert tickets. Link 3110 may allow a user to view information about concert venues. Link 3115 may allow the user to purchase CDs or other music products. Link 3120 may allow the user purchase other products. Link 3125 may allow the user to enter a contest. Link 3130 may allow the user to play a music trivia game. Link 3135 may allow the user to view profiles of performing artists. Link 3140 may allow the user to access a music information database. Link 3145 may allow the user to define his profile, including songs, artists, genres, and radio stations that he likes and doesn't like. Link 3150 may allow the user to access a desktop radio feature, to listen to music on the computer. Link 3155 may allow the user to access a database of radio stations. Link 3160 may allow the user to view schedules of programs on radio stations. Link 3165 may allow the user to synchronize user information and other data with an enhanced radio system. Advertisement 3170 may be targeted based on user preferences and history. These links are merely illustrative. Other links may be provided if desired. Other web page designs are also possible. [0192] FIGS. 32A and 32B are block diagrams showing how an enhanced radio system may synchronize data with another enhanced radio system or with an enhanced radio web site. In FIG. 32A, personal computer 3210 may be connected to portable memory device 440 of FIG. 4. The memory device may be a flash memory car, a smart card, a mobile telephone, a PDA, or other such device. Personal computer 3210 may connect to memory device 440 via any appropriate connection, such as serial port, infrared, universal serial bus (USB), PC Card bus, or any other suitable connection. Information, such as a user profile, station presets, a radio database, radio station schedules, event information, facility information, music information (e.g., audio signatures, information about songs, artists, genres, etc.), or other such information, may be transferred over the connection from personal computer 3210 to portable memory device 440. [0193] As shown in FIG. 32B, portable memory device 440 may subsequently connect to an ERS. The connection may be any appropriate connection, such as PC Card bus, serial port, USB, or infrared. The information previously loaded from personal computer 3210 into memory device 440 may be loaded into an ERS. [0194] If desired, information may be loaded from an ERS to personal computer 3210 using portable memory device 440. If desired, information may be loaded from one ERS to another ERS using portable memory device 440. [0195] FIGS. 33A through 33C show illustrative screens that may be shown on display device 150 (FIG. 1) as part of a two-way response feature. Such a feature may assist a user in responding to radio content, such as a commercial, a contest, a call-in show, a concert promotion, or the like. This feature may use a mobile telephone connected to an ERS, or other communications device 155 (FIG. 1). In screen 3310 of FIG. 33A, the user may be provided a telephone number 3312 to respond to radio content. The user may also be prompted 3314 to press a button to initiate a direct connection. In the case that the user presses the prompted button, the system may automatically dial the telephone (e.g., the mobile phone in the user's car), and make the voice connection through voice input 648 and car speakers 608 of FIG. 6A. The radio content may be paused or muted while the connection is in progress. [0196] In screen 3320 of FIG. 33B, the user may be prompted 3324 to press a button to purchase concert tickets, which may have been promoted on the radio. If the user presses the specified button, the system may transmit the request for tickets to a ticket vending service, and display the response on display device 150. [0197] Screen 3330 of FIG. 33C shows a prompt 3334 for the user to speak a specific command to enter a contest that may have been promoted on the radio. If the user speaks the specified command, the contest entry may be transmitted to the contest facility, and a confirmation may be shown on display device 150. [0198] Flow chart 3400 of FIG. 34 shows a process for providing a radio response feature in an enhanced radio system. If desired, any of the steps of this process may be omitted or performed in any suitable order. In step 3410, the system may acquire connection information, e.g., information on how to create a communications connection with an external service. The information may include, for example, a phone number, a web address, or other information needed to create a connection with the external service. In substep 3412, the information may be found in a radio station database. In substep 3414, the information may be acquired from the radio signal. The information may be acquired from a source other than the radio signal, such as communications device 155 (FIG. 1). Alternatively, the information may be hand entered by the user. [0199] In step 3415, the user may be allowed to enter information to allow remote purchasing including payment information, shipping addresses, contact information, and any other information that may be requested or required. This information may be entered offline, for example at a web site or on a personal computer, and loaded into the enhanced radio system. Alternatively, the purchasing information may be entered directly into the enhanced radio system. [0200] In step 3420, the system may initiate a connection with the external service. This may include auto-dialing a telephone in substep 3422, providing a telephone number to the user (e.g., on display device 150 (FIG. 1)) in substep 3426, creating a voice connection (e.g., using voice input 648 and speakers 608 of FIG. 6A) in substep 3424, or creating a data connection in substep 3428. Any of a number of features may be provided over the connection. [0201] In step 3430, the system may allow the user to respond to radio content. In substep 3432, the system may allow the user to respond to a commercial. For example, an offer may be mentioned in the audio of the commercial, and listeners may be invited to call in. The phone number for the advertiser may be broadcast as part of the radio signal and received by the enhanced radio system. The system may auto-dial the advertiser and allow the user to respond to the offer. [0202] In substep 3434, the system may allow the user to respond to a public radio pledge drive. For example, the user may wish to become a listener-member, to make a pledge, or to respond in another way to a pledge drive solicitation. [0203] In substep 3436, the system may allow the user to respond to a contest. For example, a contest may be mentioned on the radio, and listeners may be invited to call in. The phone number to enter the contest may be broadcast as part of the radio signal and received by the enhanced radio system. The system may auto-dial the radio station and allow the user to enter the contest. [0204] In substep 3438, the system may allow the user to participate in a call-in show. For example, listeners may be invited to call in to a radio show. The radio station phone number may be retrieved from a radio station database. The system may display the phone number for the radio station on display device 150 (FIG. 1). Similarly, the system may allow the user to make a song request to a radio station in step 3440 by auto-dialing the radio station or displaying the radio station phone number for the user. [0205] In substep 3445, the system may allow the user to make a request. For example, the user may indicate a desire to make a song request using user controls 140 (FIG. 1). The system may automatically dial the telephone number for the radio station and make an audio connection between the user and the radio station. [0206] In step 3450, the user may be allowed to purchase music. This may include buying recorded music in substep 3452 or buying concert tickets in substep 3454. The system may acquire a web address from the radio signal or radio station database, and create a data connection with a web site offering the music for sale. The system may translate input commands from user controls 140 into web commands (e.g., HTTP (Hypertext Transfer Protocol) messages) that may be sent to the web server. Confirmation may be displayed on display device 150. [0207] In step 3460, the user may be allowed to participate in a live chat. The system may create a voice link by auto-dialing a radio station, and allow the user to participate in the chat using voice input 648 and speakers 608 (FIG. 6A). [0208] While any voice response feature is active, the system may automatically mute or lower the volume of the radio signal. Alternatively, the system may automatically pause the incoming radio signal for the duration of the voice interaction. [0209] FIG. 35 shows flow chart 3500 of an illustrative process for allowing the user to send a message to a user of another enhanced radio system. Any suitable subset of these steps may be performed in any suitable order. In step 3505, the user may be allowed to send an instant message to another user, which the other user may receive and listen to or view immediately. In step 3510, the user may be allowed to send an electronic mail message to another user, which the other user may receive and listen to or view at a later time. In step 3515, the system may create a voice connection between the two users. In any of these cases, the system may allow the user to specify an electronic address or name for the other user. The system may also allow the user to maintain a list of other users to make sending messages simpler. [0210] In step 3520, the user may be allowed to include media with the message. This may include text entered by the user, a music clip, a voice message recorded by the user, or any combination of these and other types of media. In step 3525, the system may allow the media to be content recorded from a radio station by the enhanced radio system. In step 3530, the system may allow the user to include a link to a song or other content. The link may be a name, a unique identifier, an audio signature, or other types of links or combinations of such links. In step 3535, the system may allow the user to include a link to a radio station, such as a broadcast frequency or set of call letters. In step 3540, the system may allow the user to include a link to a radio show, which may include a link to the station airing the show and the name or broadcast time of the show. When the other user receives a link to a song, station, show, or other item, the other user's enhanced radio system may allow him or her to easily access that item based on the information sent in the message. In step 3545, the system may allow the user to include a concert invitation. The invitation may include information about the concert automatically filled in by the system. The system may allow the user to purchase a concert ticket or other item for the other user and send a confirmation to the other user. In step 3550, the system may allow the user to attach any other information related to music or radio. This may include, for example, a web site, the user's rating for a song, information from a database about a song, artist, or radio station, or other suitable information. [0211] FIGS. 36A though 36F show illustrative display screens for allowing a user to send a message to another user, and are illustratively discussed in conjunction with the embodiment of FIG. 6A. These display screens may be shown on display 644. Display screen 3600 of FIG. 36A may be shown when the user chooses to send a message. It may include option 3602 to send an instant message, option 3604 to send an electronic mail message, and option 3606 to create a voice connection. The user may select an option, for example, by pressing the indicated button on front panel 610 or remote control 676 (FIG. 6C), or by speaking a command using voice input 648. [0212] Once the user selects an option from screen 3600, for example option 3604 for an electronic mail message, the system may show display screen 3610 of FIG. 36B. This screen may include option 3612 for including a song clip with the message. It may include option 3614 for including a song link with the message. It may also include indicator 3616 instructing the user to press FAST-FORWARD button 630 to advance to the next screen. [0213] Display screen 3620 of FIG. 36C may include option 3622 for including a link to the current radio station. It may include option 3624 for including a link to the current radio show. And it may include indicators 3626 and 3628 instructing the user to press REWIND button 626 to return to the previous screen or FAST-FORWARD button 630 to advance to the next screen. [0214] Display screen 3630 of FIG. 36D may show option 3632 for including concert information with the message. It may include option 3634 for including a song web site with the message. Display screen 3640 of FIG. 36E may include option 3642 for recording a voice segment to include with the message. [0215] Display screen 3650 of FIG. 36F may include option 3652 allowing the user to review the message that has just been created. It may also include option 3654 to allow the user to send the message to the other user. [0216] The display screens and options shown in these figures are merely illustrative. Other display screens and options may be shown. [0217] FIG. 37 shows flow chart 3700 of an illustrative process to collect and report enhanced radio usage data. The steps of this process may be performed in any suitable order, and any steps may be omitted if desired. In step 3710, the system may collect information on radio stations that the user listens to. The information may include information on days and times that stations were listened to. It may also include information on particular songs, commercials, shows, and other content that the user may have actually heard, as well as indications of content the user may have skipped over. [0218] In step 3720, the system may collect information on enhanced radio features accessed by the user. For example, the system may log each feature used, and the day and time the feature was selected. [0219] In step 3730, the system may combine and filter the information to reduce the total amount of data. The information may be combined and summarized, and information may be filtered out based on the end purpose for the data. Personal data may be removed for privacy reasons. In step 3740, the information may be sent to a central facility for analysis, using communications device 155 (FIG. 1). [0220] FIG. 38 shows illustrative flow chart 3800 of a process to provide a karaoke feature, and is discussed illustratively in conjunction with the block diagram of FIG. 1. The steps of this process may be performed in any suitable order, and any steps may be omitted if desired. In step 3810, the system may receive the vocal portion of the audio from a radio station separately from the rest of the audio signal. Alternatively, the radio station may transmit information indicating the frequencies used for the vocal portion of the audio. In step 3820, the system may receive the lyrics for a song. The lyrics may be received as part of the radio signal along with the audio signal for the song. Alternatively, the system may acquire the lyrics separately using communications device 155. In step 3830, the system may indicate the availability of the karaoke feature to the user when the incoming radio signal supports it, for example on display device 150. In step 3840, the system may allow the user to select karaoke mode, for example with user controls 140. In step 3850, the system may remove the vocal portion of the audio. It may simply ignore the portion of the incoming signal with the vocal, or it may perform a filter on the signal to remove the vocal frequencies. Preferably, the vocal should be removed as the audio is read from memory 120. This will allow the vocal (and lyrics) to be stored in memory, and accessed later. For example, the user may alternately listen to the audio both with and without lyrics. In step 3860, the lyrics may be displayed, for example on display 644 (FIG. 6A) or monitor 370 (FIG. 3). [0221] FIG. 39 shows flow chart 3900 of an illustrative process for providing an integrated telephone feature, and is discussed illustratively in conjunction with the block diagram of FIG. 6A. The steps of this process may be performed in any suitable order, and any steps may be omitted if desired. In step 3910, the system may allow a telephone service to be connected to the enhanced radio system. For example, a mobile telephone may be connected to the system. Alternatively, the system may be connected to a wired telephone line. [0222] In step 3920, the system may allow voice dialing. The user may be allowed to create a list of common telephone numbers. The user may be allowed to dial using a voice command using voice input 648. The user may also be allowed to dial using buttons on front panel 610, remote control 676 (FIG. 6C), or other user controls. [0223] In step 3930, the system may accept telephone input from voice input 648. In step 3940, the system may send telephone output to audio output 130 (FIG. 1). The system may also perform signal canceling based on the telephone output to prevent audio feedback or echoes. In step 3950, the system may automatically lower the volume of the radio signal or mute the radio signal while a telephone call is in progress. In step 3960, the system may automatically pause the radio signal for the duration of the telephone call. [0224] Other telephone features may also be supported. For example, in step 3970, the system may allow a telephone call to be recorded into memory 120 (FIG. 1). In step 3980, the system may provide a voice mail feature, using a recorded message from memory 120, and recording the incoming call into memory 120. [0225] FIG. 40 shows a flow chart of an illustrative process for providing an enhanced radio scan feature, and is illustratively discussed in conjunction with the embodiment of FIG. 6A. Any steps of this process may be omitted if desired. In step 4010, the user may be allowed to initiate scan mode. For example, the user may press SCAN button 620 on front panel 610 or remote control 676 (FIG. 6C). In step 4020, the system may begin recording one or more stations scheduled to be selected soon. For example, the system may assign five receivers to the scan feature. One receiver may be assigned to the currently selected station, and the other four receivers may be assigned to the four stations to be selected next. The system may use these four receivers to scan for stations in advance of when they will be played for the user. [0226] In step 4030, the system may switch to the next radio station. This includes substep 4032 of playing audio from the next station. That may involved simply switching from the buffer being used to provide audio to the audio output device to the buffer being used to collect data from the second receiver. In step 4040, a receiver may be reassigned from an old station to an upcoming station. For example, the receiver being used to receive the most recent station may be used to scan and find the next available station. Alternatively, if the system is configured to record audio from the most recently listened radio station, the system may use the receiver that was being used for the second-most recent station. [0227] In step 4050, the user may be given the opportunity to stop the scan, for example by pressing SCAN button 620 a second time. If the user does not stop the scan, the system may pause a short period of time (e.g., a second or two), and repeat step 4030, scanning to the next station. If the user does stop the scan, the system will not scan to the next station. The user may be given the opportunity to listen to audio that was broadcast prior to when the audio for the final station began playing, in step 4060. In step 4070, the system may reassign the receivers and buffers used to provide the scan feature to be used for other purposes. If desired, the system may wait a period of time in case the user decides to resume scanning. [0228] If desired, the user may be allowed to scan in either direction (i.e., through higher radio frequencies or lower radio frequencies). The user may also be allowed to scan across multiple radio sources (e.g., both Internet and radio frequency broadcasts). [0229] FIG. 41 shows illustrative memory map 4100 of data stored in memory 120 (FIG. 1). Radio input buffers 4105 may be used to store the most recent radio inputs received from one or more radio stations. This area of memory may be assigned dynamically, with different radio stations having buffers of different sizes. A new area of memory may be allocated when a radio receiver is tuned to a new station, and the area may be increased or decreased in size as the user selects or deselects the station or performs other functions. [0230] Memory region 4110 may be used for stored songs and other content recorded from the radio or downloaded using communications device 155 (FIG. 1). Memory region 4115 may store information about songs and other audio segments, such as names, identifiers, audio signatures, etc. Memory region 4120 may be used to store information about different groups of content, such as artists or genres of music. Memory region 4125 may store information about radio stations. Memory region 4130 may store radio station presets. Memory region 4135 may store other user preferences. Memory region 4140 may store automatically collected usage information, such as stations the user has listened to and features the user has accessed. Memory region 4145 may store a user's contact list for a messaging or telephone feature. Memory region 4150 may be used to store software updates for the system. This memory map is merely illustrative. Other organizations of memory are possible. [0231] Some of the memory may be volatile (subject to loss if the power is lost) and some may be nonvolatile (maintained when the power is lost). It may be desirable to store some information, such as radio input buffers, in volatile memory, and to store other information, such as user preferences, in nonvolatile memory. If desired, all memory may be nonvolatile. [0232] Although our present invention has been described in considerable detail with reference to certain preferred versions thereof, other embodiments are possible. Therefore, the spirit and scope of the invention should not be limited to the description of the preferred embodiments contained herein. 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H04H60/80, H04B1/20, H04H60/58, H04M2250/74, H04H60/65, H04H60/37, H04M1/6083, H04H60/47, H04H2201/40, H04H60/74, H04H60/91, H04H60/33, H04H60/17, H04M1/72522, H04H60/51, H04H20/34, H04H60/43, H04H60/40, H04H60/63, H04H60/72, H04H60/27, H04H60/85European ClassificationH04H60/33, H04H60/80, H04H60/27Legal EventsDateCodeEventDescriptionAug 15, 2011ASAssignmentOwner name: 3D RADIO, LLC, COLORADOFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ELLIS, MICHAEL D.;ELLIS, CARON S.;SIGNING DATES FROM 20110721 TO 20110725;REEL/FRAME:026751/0228Apr 21, 2015CCCertificate of correctionRotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services