Patent Publication Number: US-2009239573-A1

Title: Electronic equipment with shuffle operation

Description:
TECHNICAL FIELD OF THE INVENTION 
     The present invention relates generally to electronic equipment, and more particularly to electronic equipment with shuffle operation such as media playback in shuffle mode. 
     DESCRIPTION OF THE RELATED ART 
     The shuffle feature is a well known function of media playback equipment wherein the order in which media objects (e.g., audio tracks) on a prerecorded media are played back randomized. The shuffle feature can add variety and unpredictability to a listening experience. 
     Playlists are also a well known feature of media playback equipment. Playlists define a group of media objects (e.g., songs, videos, still pictures, etc.) set forth in some predetermined order. Media playback equipment refer to a selected playlist to determine the particular media objects which are to be played and the order in which they are to be played. Playlists can be created by a user, generated automatically, downloaded by the user, etc., or various combinations thereof. The playlists may include only a subset of all the media objects stored in the media playback equipment (commonly referred to as the “media library”), or may include all of the media objects within the library. In the absence of a preselected playlist, media playback equipment typically reverts to a default playlist including all of the media objects within the library in the order in which the media objects are stored in memory of the media playback equipment. 
     Playlists are useful in that they provide users with more control over the particular media objects which are played during a session, as well as the particular order in which the media objects are played. Sometimes it is content of the playlist that a user is particularly interested in (e.g., all classic rock songs within a media library), with less importance on the particular order in which the media objects within the playlist are played. At other times, a user may be more interested in maintaining the order of playback of the media objects within a given playlist. For example, a user may prefer to listen to the songs from a “story album” such as Pink Floyd&#39;s “The Wall” in their original order. 
     Depending on the user&#39;s mood, feelings, etc., there will be times when a user desires that the media playback equipment play back the items in a playlist in the order in which they are listed. On the other hand, there will be times when a user may desire “shuffle” mode in which the items in the playlist are played back in randomized order. Still further, there may be times when a user desires that some media objects within the playlist be shuffled, but not all. 
     Conventional media playback equipment allows a user to select shuffle mode by either turning a shuffle feature on or off. This is typically done via a graphical user interface with which the user, by pressing appropriate buttons, etc., either activates or deactivates the shuffle feature. However, navigating through the appropriate user interface screens to turn the shuffle feature on or off can be bothersome and time consuming. Moreover, navigating through the user interface screens during playback itself can be disruptive to the listening and/or viewing experience of the user, thereby detracting from the overall entertainment experience. Thus, most users choose to either turn the shuffle feature on or off at the beginning of a playback session, and the feature remains on or off for the duration of the session. This too can detract from the overall entertainment experience. 
     Still further, users typically are not able to control the extent to which the items in a playlist are shuffled or randomized when the shuffle feature is active. For example, at times a user may desire to shuffle the order of only those songs in a playlist that are in close proximity to a current song being played. At other times, the user may wish to shuffle the order of all the songs in a playlist. Conventional media playback equipment does not provide such flexibility. 
     SUMMARY 
     In view of the aforementioned shortcomings associated with conventional media playback equipment, there is a strong need in the art for electronic equipment with media playback that do not suffer from such drawbacks. More particularly, there is a strong need in the art for electronic equipment that allows a user to engage a shuffle feature without bothersome and time consuming navigation. Moreover, there is a strong need in the art for electronic equipment that enables a user to engage a shuffle feature easily even during listening and/or viewing without detracting from the user&#39;s entertainment experience. Still further, there is a strong need in the art for electronic equipment that provides a user some degree of control as to the extent which the items in a playlist are shuffled or randomized. 
     According to the present invention, an electronic equipment is provided. The electronic equipment includes access to a playlist, the content of which identifies a plurality of media objects, and a media player section configured to play the plurality of media objects identified in the playlist in an order. In addition, the electronic equipment includes a shuffler section for altering at least one of the order in which the plurality of media objects in the playlist are played by the media player, or the content of the playlist, in response to a shuffle command. The electronic equipment further includes a motion sensor that detects motion of the electronic equipment, the motion sensor producing an output based on detected motion from which the shuffle command is derived. 
     In accordance with one particular aspect, the shuffler section alters the order in which the media objects identified in the playlist are played by the media player section in response to the shuffle command. 
     According to another aspect, the shuffler section alters the order which the media objects are played primarily in a local area of a media object within the playlist which is being played at a time when the shuffle command is issued. 
     According to yet another aspect, the shuffler section alters the order using a pseudo-random generator. 
     In accordance with still another aspect, the shuffler section alters the order primarily throughout the entire playlist. 
     In another aspect, the shuffler section alters the order using a pseudo-random generator. 
     Another aspect of the invention relates to the shuffler section altering the order by causing the media player to jump to a media object within the playlist other than the media object which is being played at a time when the shuffle command signal is issued. 
     According to another aspect, the shuffler section alters the content of the playlist in response to the shuffle command signal. 
     With yet another aspect, the electronic apparatus includes a library of media objects, the plurality of media objects identified in the playlist represent a subset of the media objects within the library, and the shuffler section alters the content of the playlist by at least one of adding additional media objects from the library to the playlist, or substituting additional media objects from the library for all or part of the plurality of media objects already identified in the playlist. 
     In accordance with still another aspect, the shuffle command signal is operational to identify different degrees of motion detected by the motion sensor, the different degrees being operative to cause the shuffler section to perform corresponding different degrees of altering. 
     According to another aspect, the different degrees of motion detected by the motion sensor pertain to the electronic equipment being shaken for a relatively short time versus a relatively long time. 
     According to yet another aspect, the different degrees of motion detected by the motion sensor pertain to the electronic equipment being shaken relatively softly versus relatively aggressively. 
     In accordance with still another aspect, in response to the shuffle command signal identifying a first degree of motion the shuffler section alters the order which the media objects are played primarily in a local area of a media object within the playlist which is being played at a time when the shuffle command is issued, and in response to the shuffle command signal identifying a second degree of motion the shuffler section alters the order primarily throughout the entire playlist. 
     In yet another aspect of the invention, in response to the shuffle command signal identifying a first degree of motion the shuffler section alters the content of the playlist to a relatively small extent, and in response to the shuffle command signal identifying a second degree of motion the shuffler section alters the content of the playlist to a relatively large extent. 
     According to still another aspect, the media objects comprise at least audio files. 
     According to yet another aspect, the media objects comprise at least video files. 
     In accordance with still another aspect, the media objects comprise at least image files. 
     According to another aspect, the electronic equipment is a mobile phone. 
     According to still another aspect, the electronic equipment is a portable personal entertainment device. 
     According to yet another aspect, the motion sensor is located remote from a main housing of the electronic equipment. 
     In accordance with another aspect, the playlist is located remote from the electronic equipment. 
     According to still another aspect, the plurality of media objects are located remote from the electronic equipment. 
     In yet another aspect of the invention, a method of reproducing media objects in an electronic equipment is provided. The method includes the steps of providing a playlist, the content of which identifies a plurality of media objects; playing the plurality of media objects identified in the playlist in an order; detecting motion of the electronic equipment; and altering at least one of the order in which the plurality of media objects in the playlist are played by the media player, or the content of the playlist, in response to detecting the motion. 
     In still another aspect of the invention, a program stored on a machine readable medium is provided. The program, when executed by a machine, provides for reproducing media objects in an electronic equipment by providing a playlist, the content of which identifies a plurality of media objects; playing the plurality of media objects identified in the playlist in an order; detecting motion of the electronic equipment; and altering at least one of the order in which the plurality of media objects in the playlist are played by the media player, or the content of the playlist, in response to detecting the motion. 
     According to another aspect of the invention, an electronic equipment is provided that includes an assemblage of objects represented in electronic form, and a shuffler section for altering at least one of the order or content of the assemblage of objects, in response to a shuffle command. In addition, the electronic equipment includes a motion sensor that detects motion of the electronic equipment, the motion sensor producing an output based on detected motion from which the shuffle command is derived. 
     According to still another aspect, the assemblage of objects includes a list of objects, and the shuffler section alters the order of the objects in the list in response to the shuffle command. 
     In accordance with still another aspect, the assemblage of objects includes a list of objects, and the shuffler section alters which objects are in the list in response to the shuffle command. 
     In accordance with still another aspect, the assemblage of objects represent a current theme setting for a user interface included in the electronic equipment, and the shuffler section alters which objects make up the current theme setting in response to the shuffle command. 
     According to another aspect, wherein the assemblage of objects includes at least one of colors, fonts, icons or sounds. 
     According to still another aspect, the assemblage of objects are represented as game items on a display included in the electronic equipment. 
     According to another aspect, the game items are playing cards. 
     In accordance with another aspect, the electronic equipment is a mobile phone. 
     According to yet another aspect, the electronic equipment is a media player, and the assemblage of objects represent criteria by which the media player forms a playlist. 
     According to another aspect, the electronic equipment is a media player, and the assemblage of objects represent individual playlists which make up an overall playlist. 
     To the accomplishment of the foregoing and related ends, the invention, then, comprises the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative embodiments of the invention. These embodiments are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Other objects, advantages and novel features of the invention will become apparent from the following detailed description of the invention when considered in conjunction with the drawings. 
     It should be emphasized that the term “comprises/comprising” when used in this specification is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic view of a mobile phone representing an exemplary electronic equipment in accordance with an embodiment of the present invention; 
         FIG. 2  is a schematic block diagram of the relevant portions of the mobile phone of  FIG. 1  in accordance with an embodiment of the present invention; 
         FIGS. 3A ,  3 B,  3 C and  3 D illustrate exemplary graphical user interface screen displays on the mobile phone of  FIG. 1  in accordance with an embodiment of the present invention; 
         FIGS. 4(   a ),  4 ( b ) and  4 ( c ) represent graphically an exemplary media library, a playlist prior to shuffle, and the playlist after shuffle in accordance with an embodiment of the present invention; 
         FIGS. 5(   a ) and  5 ( b ) represent graphically an exemplary playlist prior to shuffle, and the playlist after shuffle in accordance with another embodiment of the present invention; 
         FIGS. 6(   a ) and  6 ( b ) represent graphically an exemplary playlist prior to shuffle, and the playlist after shuffle in accordance with another embodiment of the present invention; 
         FIGS. 7(   a ) and  7 ( b ) represent graphically an exemplary playlist prior to shuffle, and the playlist after shuffle in accordance with still another embodiment of the present invention; 
         FIG. 8  is a schematic block diagram of a motion signal processor in accordance with an embodiment of the present invention; 
         FIG. 9  is a schematic block diagram of a motion signal processor in accordance with another embodiment of the present invention; 
         FIG. 10  is a flowchart representing the relevant operation of the electronic apparatus of  FIG. 1  in accordance with an embodiment of the present invention; and 
         FIG. 11  is a schematic view of a mobile phone representing an exemplary electronic equipment in accordance with another embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     The present invention will now be described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. 
     The term “electronic equipment” as referred to herein includes personal portable electronics, including, but not limited to, media players of various formats such as digital music players (e.g., CD, MP3, AC-3, .wma, etc.), video players (e.g., DVD, MPEG, .wmv, etc.), picture players (e.g., JPEG, etc.). Electronic equipment includes traditional media players such as CD and DVD players, as well as the increasingly popular “flash memory” and “hard drive” type media players, referring to the type of memory used to store various media files. Electronic equipment includes dedicated media players as well as multi-functional devices that include media players. Such multi-functional devices include portable radio communication equipment. The term “portable radio communication equipment”, also referred to herein as a “mobile radio terminal”, includes all equipment such as mobile phones, pagers, communicators, e.g., electronic organizers, personal digital assistants (PDAs), smartphones or the like. In the present application, the invention is described primarily in the context of a mobile phone. However, it will be appreciated that the invention is not intended to be limited to a mobile phone and can be any type of electronic equipment. Moreover, although the invention is described primarily in the context of shuffling media objects in a media player, it will be appreciated that the invention more generally has application in the shuffling of any types of lists or collections as will also be discussed herein. 
     Referring initially to  FIG. 1 , an electronic equipment  10  is shown in accordance with the present invention. In the exemplary embodiment described herein, the electronic equipment is a mobile phone  10 . The mobile phone  10  is shown as having a “brick” or “block” design type housing, but it will be appreciated that other type housings such as clamshell or slide-type housings may be utilized without departing from the scope of the invention. 
     The mobile phone  10  includes a display  14  and keypad  16 . As is conventional, the display  14  displays information to a user such as operating state, time, phone numbers, contact information, various navigational menus, etc., which enable the user to utilize the various features of the mobile phone  10 . Similarly, the keypad  16  may be conventional in that it provides for a variety of user input operations. For example, the keypad  16  typically includes alphanumeric keys for allowing entry of alphanumeric information such as telephone numbers, phone lists, contact information, notes, etc. In addition, the keypad  16  typically includes special function keys such as a “call send” key  18  for initiating or answering a call, and a “call end” key  20  for ending, or “hanging up” a call. Special function keys may also include menu navigation keys  22   a ,  22   b  and  22   c , for example, for navigating through a menu displayed on the display  14  to select different phone functions, profiles, settings, etc., as is conventional. Other keys included in the keypad  16  may include a volume key  24 , on/off power key  26 , as well as various other keys such as a web browser launch key, camera key, etc. 
     In the particular embodiment of  FIG. 1 , the mobile phone  10  includes the display  14  and separate keypad  16 . In an alternative embodiment, the display  14  may comprise a touchscreen which itself includes one or more keys. In yet another embodiment, the display  14  may comprise a touchscreen that includes all or substantially all of the keys used to operate the phone  10  so as to include a very limited keypad  16  or no keypad  16  at all. As will be appreciated, the particular form and function of the keys included in the keypad  16  or touchscreen/display  14  are not germane to the invention in its broadest sense. 
     As will be described in more detail below, the mobile phone  10  is a multi-functional device that is capable of carrying out various functions in addition to traditional mobile phone functions. For example, the mobile phone  10  in accordance with the present invention also functions as a media player. More specifically, the mobile phone  10  is capable of playing different types of media objects such as audio files (e.g., MP3, .wma, AC-3), video files (e.g., MPEG, .wmv, etc.), still images (e.g., .pdf, JPEG, .bmp, etc.). The media objects are typically stored in non-volatile memory within the mobile phone  10 . The mobile phone  10  reproduces audio files through a speaker  28  or an accessory such as stereo headphones  30  which may be plugged into the mobile phone  10  via an appropriate connector. The mobile phone  10  is capable of reproducing video or other image files on the display  14 , for example. 
     For reasons that will be explained more fully below, the mobile phone  10  overcomes the aforementioned shortcomings associated with existing electronic equipment that offer media playback. The mobile phone  10  may include conventional shuffle mode operation which, when activated, randomizes the order in which media objects such as song files, video files, etc. are played back. In addition, however, the mobile phone  10  includes what may be referred to as “Shake &#39;n Shuffle™” technology. The technology overcomes the limitations of conventional shuffle mode operation in conventional electronic equipment. In particular, the mobile phone  10  includes a motion sensor. When a user desires to shuffle the order of playback of the media objects, the user simply shakes the mobile phone  10 . The motion sensor detects the motion of the mobile phone  10 , and automatically shuffles the order of playback of the media objects. 
     The “Shake &#39;n Shuffle™” technology allows a user to engage a shuffle feature without bothersome and time consuming navigation through the display  14 , for example. Moreover, the “Shake &#39;n Shuffle™” technology enables a user to engage a shuffle feature easily even during playback without detracting from the user&#39;s entertainment experience. In addition, the user is provided with some degree of control as to the extent to which the media objects are shuffled or randomized. For example, by shaking the mobile phone  10  for a relatively short time the user can command a limited amount of shuffle. By shaking the mobile phone  10  for a relatively long time, the user can command a more extensive amount of shuffle. Alternatively, the user can control the extent of shuffle by shaking the mobile phone relatively softly versus aggressively. 
       FIG. 2  represents a functional block diagram of the mobile phone  10 . The construction of the mobile phone  10  is generally conventional with the exception of media player with shuffle mode operation as described herein. Preferably, the media player with shuffle mode operation is implemented primarily via-application software within the mobile phone  10 . However, it will be apparent to those having ordinary skill in the art that such operation can be carried out via primarily software, hardware, firmware, or combinations thereof, without departing from the scope of the invention. 
     The mobile phone  10  includes a primary control circuit  40  that is configured to carry out overall control of the functions and operations of the mobile phone  10 . The control circuit  40  may include a CPU, microcontroller, or microprocessor, etc., collectively referred to herein simply as a CPU  42 . The CPU  42  executes code stored in memory within the control circuit  40  (not shown) and/or in a separate memory  44  in order to carry out conventional operation of the mobile phone functions  45  within the mobile phone  10 . In addition, however, the CPU  42  executes code stored in the memory  44  in accordance with the present invention in order to perform a media player function  46  and shuffler function  48 . As is explained in more detail below with respect to  FIGS. 3-10 , the media player function  46  is used within the mobile phone  10  to play various media objects such as audio files, video files, picture/image files, etc. The shuffler function  48  is used in conjunction with the otherwise conventional media player function  46  to provide for shuffling of the media objects during playback as a result of the user shaking the mobile phone  10 . 
     The memory  44  may include one or more playlists  50  created by the user or otherwise provided within the mobile phone  10 . A playlist  50  identifies a list of media objects that the mobile phone  10  is to reproduce during playback. The media objects appear in the playlist in the order in which the media objects are intended to be reproduced normally (i.e., in the absence of a shuffle operation). The user may generate the playlists, or the user may download the playlist. Alternatively, the mobile phone may generate the playlist (e.g., based on a user input such as genre, artist, year of release, etc.), etc. In yet another alternative, playlist(s) may reside on remote storage, e.g., on a remote server accessible by the mobile phone  10  via a wireless internet connection. The particular manner in which the playlists are generated is not germane to the present invention, as will be appreciated. 
     The mobile phone  10  further includes a media library  52  in accordance with the preferred embodiment. The media library  52  represents a storage medium that stores various media objects in the form of audio files, video files, picture/image files, etc. The storage medium preferably is a non-volatile memory such as a large capacity flash memory or micro-hard drive, each of which are well known in personal media players. In a more limited context, the media library  52  may be represented by a relatively small capacity compact disk (CD), mini-disk, flash card, etc., each of which may be inserted into the electronic equipment for reproduction of the media objects thereon. Alternatively, media object(s) also may reside on remote storage. For example, the media objects may reside on a remote server also accessible by the mobile phone  10  via a wireless internet connection. The playlist(s)  50  each identify a list of media objects that are stored in the media library  52  and/or are accessible on remote storage. Typically a playlist will include only a subset of the media objects in the media library  52  or remote storage, although a playlist could include all of the media objects in the media library  52  or remote storage. 
     In accordance with conventional media player operation, the user will select a playlist  50  from among those in the memory  44  via a user interface typically in combination with the display  14 . Alternatively, the user may request that the media player function  46  create a playlist  50  automatically (e.g., based on genre, artist, year of release, etc.). As yet another alternative, the media player function  46  will revert to a default playlist  50  in the absence of a specified selection by the user. Such a default playlist  50  may result from the order in which media objects are stored in the media library  52 . For example, the media player function may revert to a default playlist where it plays the media objects stored in the media library  52  beginning at a starting address and sequentially therethrough to an ending address. 
     A user may initiate the media player function  46  via one or more keys on the mobile phone  10 . Upon initiating playback, the media player function  46  looks to the selected (or default) playlist  50  and identifies the first media object in the list. Thereafter, the media player function  46  proceeds to reproduce the media object via the speaker  28 /headset  30  and/or display  14 . More particularly, the media player function  46  accesses the media object from the media library  52 , and converts the digital data to an audio and/or video signal presented to the speaker  28 /headset  30  and/or display  14 . Upon completing the reproduction of the first media object in the playlist  50 , the media player function then proceeds to reproduce the next media object in the playlist  50  in the same manner. This process continues until the media player function  46  reproduces the last media object in the playlist  50 . 
     If the user requests conventional shuffle mode operation during playback of a playlist  50 , the media player function  46  randomizes the order in which the media objects in the playlist  50  are reproduced. Typically this is done with the use of a pseudo-random generator within the media player function  46 . The output of the pseudo-random generator serves to identify the next media object to be reproduced from the playlist, thus resulting in a randomized output. As noted above, however, conventional shuffle mode operation can be bothersome and time consuming in that it requires the user to navigate through the appropriate user interface screens to turn the shuffle feature on or off. Moreover, navigating through the user interface screens during playback itself can be disruptive to the listening and/or viewing experience of the user, thereby detracting from the overall entertainment experience. Thus, most users choose to either turn the shuffle feature on or off at the beginning of a playback session, and the feature remains on or off for the duration of the session. This too can detract from the overall entertainment experience. 
     Accordingly, the mobile phone  10  of the present invention further includes a motion sensor  54  as previously mentioned. The motion sensor  54  may be any type of motion sensor for detecting motion of the mobile phone  10  and producing a corresponding output. For example, the motion sensor  54  may be an accelerometer (e.g., single-axis or multiple-axis) which senses the acceleration of the mobile phone  10 . Alternatively, the motion sensor  54  may be a simple mechanical device such as a mercury switch or pendulum type apparatus for sensing movement of the mobile phone  10 . As will be appreciated, the particular type of motion sensor  54  is not germane to the invention. 
     The motion sensor  54  preferably resides within the housing of the mobile phone  10  along with the other circuitry represented in  FIG. 2 . However, it is not necessary that the motion sensor  54  reside within the housing. For example, the motion sensor  54  may be located outside the phone  10 , e.g., attached to the headset  30  making up part of the overall mobile phone  10  or other electronic equipment. The motion sensor  54  preferably is made up of a simple, low-cost component such as an accelerometer or a mechanical motion switch. On the other hand, the motion sensor may be more complex and rely on features of a built-in GPS system, ultrasonic/infrared radiators, etc., without departing from the scope of the invention. 
     The motion sensor  54  produces an output indicative of motion of the mobile phone  10 . This output is provided to a motion signal processing section  56  that processes and conditions the signal prior to being input to the control circuit  40 . Specifically, the motion signal processing section  56  provides a shuffle command signal to the control circuit  40  via line  58 . The motion signal processing section  56  filters the output of the motion sensor  54  or otherwise conditions the output using known techniques such that the shuffle command signal is provided to the control circuit  40  only in instances where the user decidedly shakes the mobile phone  40  (e.g., back and forth. In other words, it is undesirable for a shuffle command to be provided to the control circuit  40  as a result of brief or casual movement of the mobile phone  10  (e.g., as a result of being dropped, carried by a user while walking or jogging, etc.). Therefore, the motion signal processing section  56  preferably requires that the output from the motion sensor  54  be maintained for at least a predetermined time and/or amplitude prior to issuing a shuffle command signal as will be appreciated. 
     A person having ordinary skill in the art of computer programming and specifically in applications programming for mobile phones and media players will consider it obvious in view of the description provided herein how to program a mobile phone  10  to operate and carry out the functions described herein. Accordingly, details as to the specific programming code have been left out for sake of brevity. Also, while the media player function  46  and shuffler function  48  are carried out via the CPU  42  and application software in the memory  44  in accordance with the preferred embodiment of the invention, such functions could also be carried out via dedicated hardware, firmware, software, or combinations thereof, without departing from the scope of the invention. 
     Continuing to refer to  FIG. 2 , the mobile phone  10  includes an antenna  60  coupled to a radio circuit  62 . The radio circuit  62  includes a radio frequency transmitter and receiver for transmitting and receiving signals via the antenna  60  as is conventional. The mobile phone  10  further includes a sound processing circuit  64  for processing the audio signal transmitted by/received from the radio circuit  62 . In addition, the sound processing circuit  64  serves to process the audio signal provided by the control circuit  40  during playback of media objects. Coupled to the sound processing circuit  64  are the aforementioned speaker  28 , and a microphone  68  which enable a user to listen and speak via the mobile phone  10  as is conventional. In addition, a headphone jack  70  coupled to the sound processing circuit  64  is provided. This allows the headset  30  to be connected to the mobile phone  10 . Thus, when functioning as a media player the mobile phone  10  may direct audio to the speaker  28  and/or the headset  30  via the sound signal processing circuit  64 . The radio circuit  62  and sound processing circuit  64  are each coupled to the control circuit  40  so as to carry out overall operation. 
     The mobile phone  10  also includes the aforementioned; display  14  and keypad  16  coupled to the control circuit  40 . In the case where all or part of the display  14  comprises a touchscreen, such operation may be represented by the touchscreen  14   a  in  FIG. 2 . The mobile phone  10  further includes an I/O interface  72 . The I/O interface  72  may be in the form of any one of many typical mobile phone I/O interfaces, such as a multi-element connector at the base of the mobile phone  10 . As is typical, the I/O interface  72  may be used to couple the mobile phone  10  to a battery charger to charge a power supply unit  74  within the mobile phone  10 . In addition, or in the alternative, the I/O interface  72  may serve to connect the mobile phone  10  to a wired personal hands-free adaptor (not shown) or Bluetooth adaptor (also not shown) for use with a Bluetooth-based hands-free adaptor. Further, the I/O interface  72  may serve to connect the mobile phone  10  to a personal computer or other device via a data cable, etc. As another alternative, the I/O interface  72  may serve to connect the mobile phone  10  to a docking station including an audio amplifier, speakers and/or video display to allow for enhanced viewing/listening of the media objects as part of the media player function. 
     Turning now to  FIGS. 3A-3D , exemplary screen displays are shown illustrating a manner in which a user may initiate the Shake &#39;n Shuffle™ features of the present invention. Using the navigation keys  22   a ,  22   b  and  22   c  on the keypad  16 , for example, the user may call up a main menu on the display  14  as shown in  FIG. 3A . By manipulating the navigation keys, the user may select “Media” leading to the sub-menu shown in  FIG. 3B . Again, by manipulating the navigation keys the user may then select “Media Settings” resulting in the sub-menu shown in  FIG. 3C . By selecting “Playback” in the menu of  FIG. 3C , the user may thereby initiate the features of the present invention. Specifically, the user may select in the menu of  FIG. 3D  whether the Shake &#39;n Shuffle™ shuffler function processing is “On” or “Off”. By selecting either “On” or “Off”, the user controls how the mobile phone  10  functions with respect to media playback as will now be described in detail with respect to  FIGS. 4-7  and  10 . 
     Referring to  FIGS. 4(   a ) and  4 ( b ), an exemplary playlist  50  is shown prior to and subsequent to, respectively, a shuffle command via the motion sensor  54  and motion signal processing section  56 .  FIG. 4(   c ) illustrates and exemplary media library  52 . As is shown in  FIG. 4(   c ), the media library  52  may include a wide variety of media objects in the form of audio files (e.g., Song A thru Song XFT), video files (e.g., Video A thru Video LO), picture/image files (e.g., PIC A thru PIC SMRT). The playlist  50 , as shown in  FIG. 4(   a ), includes a subset of the songs within the media library  52 . In this particular example, the playlist  50  includes, in order, Song A thru Song O. It will be appreciated that in another embodiment, the playlist  50  may include audio files, video files, picture/image files, etc., or any combination thereof, without departing from the scope of the invention. 
       FIG. 4(   a ) illustrates Song E as being highlighted. Such highlight convention is intended to indicate the current media object being played by the media player function  46  within the playlist  50 . Thus,  FIG. 4(   a ) is meant to illustrate Song E being reproduced immediately prior to a shuffle command. 
     Next, assume a user of the mobile phone  10  proceeds to shake the mobile phone  10  with his or her hand, such as with a dice shaking motion. The motion sensor  54  detects such motion and the motion signal processing section  56  processes the output of the motion sensor  54  to output a shuffle command signal to the control circuit  40 . As will be described in more detail below with respect to  FIGS. 8 and 9 , the motion signal processing section  56  may be capable of outputting a shuffle command signal indicative of different degrees to which the mobile phone  10  has been shaken by the user. The different degrees may be used to define the type of shuffle, the extent of shuffle, etc. The different degrees may be used indirectly in the randomization, e.g., by defining the type or extent handled by an otherwise conventional pseudo-random generator. Still further, the different degrees may be used directly in the randomization, e.g., by providing a seed value to the otherwise conventional pseudo-random generator. The present invention in its broadest sense covers any and all use of different degrees. 
     In the example of  FIG. 4(   b ), it is assumed that the user has shaken the mobile phone  10  to a lesser degree rather than a greater degree. In accordance with the present invention, the shuffler function  48  responds by shuffling the contents of the playlist only in a localized manner with respect to Song E which had currently been playing. In other words, the shuffler function  48  alters the order of the playlist only with respect to those songs that are in near proximity of Song E. Thus,  FIG. 4(   b ) illustrates how the shuffler function  48  alters the order of an arbitrary number of songs (e.g., five in the example of  FIG. 4(   b )) in near proximity to Song E. As a result, Songs F thru J are shuffled, whereas Songs K thru O remain in their original order. In the exemplary embodiment, the media player function  46  begins with the next song in the playlist following the shuffle, e.g., Song J. The actual randomizing of the songs can be done using conventional shuffle techniques such as a pseudo-random generator, as will be appreciated. In this case, however, the randomizing is limited to only those songs that are local to the song being currently played. 
     Also, it will be appreciated that although the playlist  50  is shown herein after a shuffle command as containing the songs in altered order, this is merely meant to represent the altered order in which the objects in the media list will be played. Depending on the type of media player function  46  and shuffler function  48 , the shuffler function  48  may literally alter the order of the listing of the objects in the playlist  50 . More typically, however, the objects in the playlist  50  will remain in their original order as represented in  FIG. 4(   a ). The shuffler function  48  will alter the order of the objects in the manner represented in  FIG. 4(   b ) by randomizing the location of a pointer which is calculated to point to the next media object in the playlist, as will be appreciated. The present invention is not intended to be limited to any particular form of randomizing, and does not require that the order of the contents of a playlist itself literally be altered. Rather, the present invention is concerned with the randomizing or shuffling of the order in which the contents are reproduced relative to the original playlist. 
       FIGS. 5(   a ) and  5 ( b ) illustrate another example of the shuffling of the playlist  50  in response to a shuffle command signal.  FIG. 5(   a ) illustrates a playlist identical to the playlist of  FIG. 4(   a ). Again, it is shown that the song being played immediately prior to the shuffle is Song E. In this example, however, assume a user shakes the mobile phone  10  to a greater degree rather than a lesser degree. The motion signal; processing section  56  issues a shuffle command signal on line  58  to the control circuit  40  indicative of the greater degree of shaking. In response, the shuffler function  48  proceeds to shuffle the order of the songs throughout the playlist  50  as represented in  FIG. 5(   b ) (or in some other predefined manner different from when the mobile phone  10  is shaken to a lesser degree). Thus, the media player function  46  following the shuffle proceeds to play Song J, followed by Songs L, G, H, F, O, . . . , etc. Again, the shuffler function  48  may use conventional shuffle techniques, such as a pseudo-random generator, to randomize the order of the media objects in the playlist  50 . 
     It is noted that the order of Songs A thru E in the playlist  50  of  FIG. 5(   b ) is also altered, despite these songs having already been played at the time of the shuffle command. Moreover, Songs A thru E remain above the currently played Song J following the shuffle command. Songs A thru E in such case would preferably remain above the currently played Song J in the playlist because even in shuffle mode users typically prefer to hear songs in a playlist that they have not yet heard before hearing songs repeated. On the other hand, should the user request that the playlist be repeated upon the playing of the last song in the playlist  50 , Songs A thru E are now shuffled to alter the original order in which they were heard. 
     Consequently, it will be appreciated that the particular form of shuffling which is implemented is not necessarily limited in the invention in it&#39;s broadest sense. 
       FIGS. 6(   a ) and  6 ( b ) illustrate another example of the type of shuffling which may be implemented by the shuffler function  48  in response to a shuffle command signal from the motion signal processing section  56 .  FIG. 6(   a ) represents a playlist  50  prior to a shuffle command similar to  FIGS. 4(   a ) and  5 ( a ). Again it is assumed that the song being played immediately prior to the shuffle command is Song E as shown in  FIG. 6(   a ). Shaking of the mobile phone  10  by the user is detected by the motion sensor  54 , resulting in a shuffle command signal being issued to the control circuit  40 . In response, the shuffler function  40  causes the order of the songs reproduced to be “shuffled” in the sense that the current song being played is changed randomly to another song further down in the list. Thus, as is represented in  FIG. 6(   b ), the current song being played changes from Song E to Song K as a result of the shuffle operation. In an alternative embodiment, the shuffler function  48  may be programmed to change randomly from the current song to a song within X number of songs of the current song prior to the shuffle in the case of a first degree of shake, and to a song within Y number of songs of the current song prior to the shuffle in the case of a second degree of shake, greater than the first degree, where Y is greater than X. 
       FIGS. 7(   a ) and  7 ( b ) represent yet another example of the type of shuffling which may be carried out in accordance with the present invention. In this example, rather than simply alter the order in which the media objects are played from the playlist  50 , the shuffler function  48  alters the content of the playlist  50 . For example,  FIG. 7(   b ) illustrates how in response to a shuffle command signal from the motion signal processing section  56 , the shuffler function  48  alters the content of the playlist following current song E. The shuffler function  48  may be programmed to alter the content simply by drawing from the contents of the media library  52 . The actual objects chosen from the media library  52  can be determined randomly or according to some predefined pattern as will be appreciated. 
       FIG. 7(   b ) illustrates a case where the contents of the playlist  50  are completely replaced following shaking of the mobile phone  10  by the user. This may represent the response in the case where the mobile phone  10  is shaken to one extent (e.g., vigorous shaking). In a case where the mobile phone  10  is shaken to another extent (e.g., less vigorous shaking), the shuffler function  48  may be programmed to alter the content of the playlist to a lesser extent (e.g., in only a localized region near the current song as in the example of  FIGS. 4(   a ) and  4 ( b )). 
     It will be appreciated that the various features of the different embodiments discussed herein can be mixed and matched and further represent examples of the present invention. For instance, the shuffle command signal in another embodiment in relation to  FIG. 7(   b ) could also be designed to shuffle Songs A thru E prior to the current song in the playlist  50 . For example, these songs also could be randomized as were Songs A thru E in the embodiment of  FIG. 5(   b ) for the same reasons discussed above. Alternatively, Songs A thru E could be altered in the sense of replaced with other songs just as in the case of Songs F thru O in the example of  FIG. 7(   b ). 
     Referring now to  FIGS. 8 and 9 , two different examples of the motion signal processing section  56  are shown for providing a shuffle command signal representing different degrees of shaking by the user. In the embodiment of  FIG. 8 , the output from the motion sensor  54  is provided to a low pass filter  80  which filters the signal to remove any noise or spurious signals resulting from brief, unintended movement of the mobile phone  10 , or casual movement of the mobile phone  10 . The filtered output is input to a threshold detector  82 . The threshold detector  82  is designed to output a shuffle command signal having a first pulsewidth in the event the output of the LPF  80  represents shaking by the user of less than or equal to a predefined time (e.g., 2 seconds). Moreover, the threshold detector  82  is designed to output a shuffle command signal having a second pulsewidth, greater than the first, in the event the output of the LPF  80  represents shaking by the user of more than a predefined time. In this manner, the shuffle command signal is indicative of the degree to which the mobile phone  10  is shaken (e.g., shaken equal to or less than 2 seconds vs. shaken more than 2 seconds). 
     While the example of  FIG. 8  determines degree based on time shaken, other criteria may be used. For example,  FIG. 9  illustrates how a magnitude detector  84  may be substituted in place of the threshold detector  82 . Specifically, the magnitude detector  84  is designed to output a shuffle command signal having a first pulsewidth in the event the output of the LPF  80  has a magnitude which is less than or equal to a predefined value X. The magnitude detector  84  is further designed to output a shuffle command signal having a second pulsewidth, greater than the first, in the event the output of the LPF  80  has a magnitude that is greater than a predetermined value X. The value of X is selected such that a value equal to or below X is indicative of moderate shaking of the mobile phone  10  by the user, whereas a value greater than X is indicative of more aggressive or vigorous shaking of the mobile phone  10  by the user. Other criteria may include, for example, degrees based on the particular axis upon which the mobile phone  10  is shaken in the case of a multiple axis motion sensor  54 . 
     Referring now to  FIG. 10 , a flowchart is shown that illustrates the operation of the mobile phone  10  with respect to the Shake &#39;n Shuffle™ in accordance with the present invention. Operation begins in Step  100  where the mobile phone  10  has been turned on, e.g., via the power on/off key  28  ( FIG. 1 ). Next, in Step  102  the control circuit  40  determines if the mobile phone  10  is in media player mode. The mobile phone  10  may have been placed in the media player mode as a result of user selection via the navigation keys and display, or any other predesignated manner as will be appreciated. If the mobile phone  10  has not been placed in the media player mode, the mobile phone  10  will continue to loop through Step  102  as shown in  FIG. 10 . 
     If the mobile phone  10  is in the media player mode as determined in Step  102 , the mobile phone  10  proceeds to Step  104 . In Step  104 , the control circuit  40  determines if the mobile phone  10  has been placed in the shake-based shuffle mode as described herein. The mobile phone  10  may have been placed in the shake-based shuffle mode in the manner described above in relation to  FIGS. 3A  thru  3 D, or any other manner as will be appreciated. In the event the shake-based shuffle mode has not been selected as determined in Step  104 , the mobile phone  10  proceeds to Step  106  in which normal playback is carried out without the features of the invention. 
     On the other hand, if the user selects shake-based shuffle operation in accordance with the present invention as determined in Step  104 , the mobile phone  10  proceeds to Step  108 . In Step  108 , the control circuit  40  determines if the user has selected a playlist among the playlists  50  in memory  44 . The user may select the playlist  50  in any known manner, including via the navigation keys and display  14  as is typical. If the user has selected a playlist as determined in Step  108 , the mobile phone  10  proceeds to Step  110 . If the user has not selected a playlist as determined in Step  108 , the mobile phone  10  proceeds to Step  112  where the control circuit  40  reverts to a default playlist as described herein. Thereafter, the mobile phone  10  proceeds to Step  110  as shown. 
     In Step  110 , the control circuit  40  determines if the user has selected the play function of the media player, whereby the media player function  46  is to begin playing the media objects in the playlist  50  from Step  108  or Step  112 . The user may select the play function using any conventional technique, typically by pressing a corresponding key on the mobile phone  10 . If the user has not selected the play function in Step  110 , the control circuit  40  will simply loop around Step  110  as shown. On the other hand, upon the user selecting the play function, the mobile phone  10  proceeds from Step  110  to Step  114 . 
     In Step  114 , the control circuit  40  causes the media player function  46  to begin playing the current selection in the playlist  50 . If it is the first time the user selected the play function in relation to the selected playlist  50 , the current selection following Step  110  will typically be the first media object included in the playlist  50 . On the other hand, if the user was previously using the media player function  46  and chose to pause or stop play, the current selection in Step  114  would typically be the media object that was currently being reproduced when the user chose to pause or stop play. For sake of explanation, the current selection in Step  114  following Step  110  is assumed to be the first media object included in the playlist  50 . 
     Following Step  114 , the mobile phone  10  proceeds to Step  116  in which the control circuit  40  determines if a shuffle command has been received via the motion signal processing circuit  56 . As described above, such a shuffle command signal would be a result of the user shaking the mobile phone  10  and the motion sensor  54  detecting such shaking. In the event a shuffle command has not been received as determined in Step  116 , the mobile phone  10  proceeds to step  118  where the control circuit  40  determines if the media player function  46  has completed playing the current selection. If the current selection has not been completed, the mobile phone  10  continues to loop from Step  118  back to Step  114  where the media player function  46  continues to play the current selection, to Step  116  where the control circuit  40  determines if a shuffle command signal has been received, and back to Step  118 , assuming a shuffle command signal has not been received. 
     If in Step  118  the control circuit  40  determines that the media player function  46  has completed playing of the current selection, the mobile phone  10  proceeds to Step  120 . It is in Step  120  that the control circuit  40  determines whether the media player function  46  has reached the end of the playlist  50 . If yes, the play operation is complete and the mobile phone proceeds to Step  122  where the play function is automatically stopped. Alternatively, if the user has selected for the playlist to be repeated as is common, the above-described operation beginning with Step  114  can be repeated starting with the first media object in the playlist. 
     On the other hand, if the media player function  46  has not reached the end of the playlist  50  as determined in Step  120 , the mobile phone  10  proceeds to Step  124 . The control circuit  40  in Step  124  causes the media player function  46  to begin to play the next media object in the playlist  50  as the new current selection. Thereafter, the mobile phone  10  returns to Step  114  and the above-described process is repeated. 
     Referring back to Step  116 , in the event the control circuit  40  does detect a shuffle command signal during the playback of the current selection, the mobile phone  10  proceeds to Step  126  as shown. In Step  126 , the control circuit  40  determines if the shuffle command signal represents a first degree of shuffle. Such determination may be based on the pulsewidth of the shuffle command signal as in the embodiments of  FIG. 8  or  9 , or by some other manner as will be appreciated. If the shuffle command signal represents a first degree of shuffle as determined in Step  126 , the mobile phone  10  continues to Step  128  in which the particular type of shuffle associated with the first degree is carried out by the shuffler function  48 . If the shuffle command signal does not represent a first degree of shuffle as determined in Step  126 , it can be assumed in this herein described two-degree embodiment that the shuffle command signal represents the second degree of shuffle. Thus, the mobile phone proceeds to Step  130  and the particular type of shuffle associated with the second degree is carried out by the shuffler function  48 . Following both Steps  128  and  130 , the mobile phone  10  proceeds to Step  124  and the above-described procedure is continued. In this case, however, the order of playback and/or content of the playlist  50  will have been altered as exemplified above. 
     The particular types of shuffle carried out in accordance with a first degree and a second degree as described above can be any type. The above description provides examples of different types, but the present invention is not intended to be limited to only those examples described herein. Further, although the examples described herein include first and second degrees of shake and control based thereon, the present invention includes any number of degrees. All that is needed is to provide an appropriate motion signal processing circuit  56  as will be readily appreciated by those having ordinary skill in the art based on the disclosure herein. Still further, it will be appreciated that the present invention does not require the detection of different degrees of shake in it&#39;s broadest sense. The inventive concepts apply fundamentally to the simple detection of shaking, based upon which the order and/or content of playback from a playlist may be altered. 
     In view of the above description, it will be appreciated that the present invention provides for electronic equipment with media playback that do not suffer from the drawbacks of conventional media playback devices. More particularly, the present invention provides for electronic equipment that allows a user to engage a shuffle feature without bothersome and time consuming navigation. A user may engage a shuffle feature simply by shaking the electronic equipment, even during listening and/or viewing without detracting from the user&#39;s entertainment experience. Moreover, the user is provided with a degree of control as to the extent to which the items in a playlist are shuffled or randomized. 
     It should be appreciated that the term “playlist” as referred to herein represents a list of media objects intended for playback. The order in which the media objects appear in the list is indicative of the order in which the media objects are to be played. The playlist may be an actual entity (typically a digital file) within an electronic equipment. Alternatively, and particularly in the case of a default playlist in an electronic equipment, the playlist may be represented circumstantially based on the manner in which the media objects are normally reproduced. For example, the playlist may represent the media objects and the order the electronic equipment would reproduce the media objects during conventional operation. More specifically, an electronic equipment may simply began playing media objects one after another starting at a beginning address of a recording medium and the media object stored thereat (e.g., the first track of a CD) and proceeding sequentially through the media objects in the order they are stored in the recording medium (e.g., tracks  2 ,  3 ,  4 , etc. of a CD). As another alternative, a playlist may be represented by a table of contents of a storage medium stored as part of data management information in the electronic equipment. A “playlist”, in the context of the present invention, refers to the media objects that would normally be reproduced by the electronic equipment, and the order in which the media objects would normally be played, if a shuffle feature was not activated. Altering of the playlist refers to the order in which the shuffled media objects would be played, which is different from the order in which the media objects would be played if the shuffle feature was not activated. 
     Although the result of a shuffle operation within a playlist is represented herein predominantly graphically by a change in the displayed order and/or content of the playlist, those having ordinary skill in the art will appreciate that a playlist itself need not necessarily be altered. For example, the electronic equipment may be designed to use a pointer to point to the address of a particular media object within the playlist to be played. In normal sequential playback, the pointer simply points to the address of the next media object in the sequence of the playlist. In shuffle mode, on the other hand, a random or pseudo-random generator is used to cause the pointer to move randomly to a next media object in the playlist to be played. The present invention is intended to cover any and all such types of shuffle operation. The change in the displayed order of the playlist as illustrated herein is simply intended to facilitate ease of understanding. 
     Furthermore, the principals of the invention are applicable to shuffle operation within any type of electronic equipment, and are not necessarily limited to shuffle operation in media playback. For example,  FIG. 11  illustrates a mobile phone  10  similar to the example in  FIG. 1 ; however, the phone  10  does not necessarily include media player function and lists of media objects. Instead, the mobile phone  10  is shown more generally as including list/object related functions  46 ′, lists  50 ′ and/or an object library  52 ′. The particular functions and how the functions relate to the objects or lists of objects can be in relation to virtually any user related function. 
     For example, instead of the objects in a list being media files as discussed above, the objects could be the different possible theme settings (e.g., colors, fonts, icons, sounds, backgrounds, etc.) relating to the user interface (e.g., display  14 , speaker  28 , etc.) of the phone  10 . The user shakes the mobile phone  10  in the same manner described above, but in this example the shuffler function randomizes the theme settings of the phone to generate a new selection of colors, fonts, icons, etc., which are provided to the user as the theme of the device. Thus, simply by shaking the phone  10  the user is presented with a randomly generated theme, thereby adding to the user&#39;s entertainment experience. 
     In the case where the electronic equipment is a game, the shuffle operation can be used as a part of the game. For example, the mobile phone  10  may include a card game function among the list/object related functions  46 ′. Rather than the user pressing a “deal” button as is conventional in electronic card, the user shakes the mobile phone  10 . The motion sensor  54  senses the motion, and the motion signal processing  56  prompts the shuffler function to randomly alter the cards (representing an assemblage of objects) displayed on the display device  14 . The shuffle operation is not limited to card games, but any type of game where the user may desire to alter the order or content of what is presented on the display  14 . The randomization itself in all of the above-described examples can be carried out simply via a pseudo-random generator within the control circuit  40 , and particularly the shuffler function  48 , as will be appreciated. 
     Furthermore, there may be instances where a shuffle operation based on casual movement of the user may be desirable. For example, a user who is out jogging or walking may desire a more continuous form of randomization in association with the movement of the electronic equipment as a result of walking or jogging. In such case, the motion sensor  54  and motion signal processing  56  can be readily adapted to provide a shuffle command signal with each significant motion of a user during walking or jogging. Alternatively, the motion sensor  54  and motion signal processing  56  may be configured to include an adjustable timer so that the user may choose how frequently a shuffle command signal may be valid. 
     Still further, while the objects with respect to media players are described above primarily as media objects in the form of audio files, video files, image files, etc., the objects of the shuffle operation may be other media related objects. For example, a playlist  50  may be made up of objects whereby the objects themselves represent individual playlists. By shaking the mobile phone  10 , the shuffle command signal causes an altering of the order of the individual playlists within the playlist  50 , and/or causes an altering of the individual playlists that make up the playlist  50 . 
     In still another example, shaking of the mobile phone  10  may be used to randomize the rules of a smart playlist. For example, shaking can be used to randomize criteria that form an automated “smart” playlist such as genre and recency. Thus, for example, shaking can result in a shuffle command signal that alters the criteria associated with a smart playlist so that a user ends up hearing a list of all rock music not listened to recently. As a result of a further shake, the user may get a smart playlist made up of most favorite songs from a given year, etc. 
     Although the invention has been shown and described with respect to certain preferred embodiments, it is obvious that equivalents and modifications will occur to others skilled in the art upon the reading and understanding of the specification. The present invention includes all such equivalents and modifications, and is limited only by the scope of the following claims.