Abstract:
A system and method for automatically adjusting characteristics of a television receiver, such as the video and audio settings, based on characteristics of the program being viewed. The system accesses a pre-defined list of program topics and themes stored in a television database. For each topic and theme, settings for picture quality such as contrast, color and brightness and settings for audio such as audio processor type, bass, and treble are stored. When the system is able to match the currently viewed program with one from the database the audio and video settings are automatically adjusted for that program. If the viewer switches to another program or if one program ends and another begins then the acquisition and adjustment process is repeated. The system can be disabled by the viewer if desired.

Description:
FIELD OF THE INVENTION 
     This invention relates to program guide data for television systems in general and, in particular, autopilot audio and video attribute setting capabilities for various types of television programs. 
     BACKGROUND 
     An Electronic Program Guide (EPG) is an interactive, on screen analog to TV listings found in local newspapers or other print media. An EPG provides 20 information about each program within the time frames covered by the EPG which typically ranges from the next hour up to seven days. The information contained in an EPG includes programming characteristics such as channel number, program title, start time, end time, elapsed time, time remaining, rating (if available), topic, theme, and a brief description of the program&#39;s content. EPGs are usually arranged in a two dimensional table or grid format with time on one axis and channel numbers on the other axis. Unlike non interactive guides that reside on a dedicated channel and merely scroll through the current programming on the other channels for the next 2 to 3 hours, EPGs allow viewers to select any channel at any time up to seven days forward. Further EPG features include the ability to highlight individual cells of the grid containing program information. Once highlighted the viewer can perform functions pertaining to that selected program. For instance, the viewer could instantly switch to that program if it is currently being aired. Viewers could also program one touch video cassette recording (VCR) or the like if the television is properly configured and connected to a recording device. 
     Such EPGs are known in the art and are described, for instance, in U.S. Pat. Nos. 5,353,121, 5,479,268, and 5,479,266 issued to Young et al. and assigned to StarSight Telecast, Inc. These patents are directed to television scheduling systems or EPGs in which a television display can be activated by a viewer that shows the current channel offerings in a table format. The cells of the table which form the columns and rows are irregular in length (row dimension) because not every program spans the same amount of time while the columns are regular in height. Typically, programs are broken down into ½ hour increments and a single program can last in excess of two hours. This is illustrated in FIG. 1 of U.S. Pat. No. 5,353,121 in which “Perfect Strangers” spans from 11:00 AM to 11:30 AM while in the row below “Sesame Street” spans the length of the grid covering in excess of 1 ½ hours. 
     Television programming extends over a broad spectrum of shows and events. Each show or event has distinct characteristics, or attributes, which are enjoyed most by viewers when various characteristics, or attributes, of the television receiver, e.g., audio and video settings, are matched to the characteristics of the program. The particular program characteristics that are of interest may be indicated by the topic and theme of the program. For instance, musical events are best viewed with audio and video settings which are different from sporting events. Clearly, the settings used for a fast moving, action packed ice hockey game would be different than those used for a symphony orchestra. Further, different sports each require different settings. Golf and football, while both sporting events, each have characteristics distinct from one another that require different audio and video settings to enhance the viewer&#39;s enjoyment of the broadcast. Similarly, different types of movies require different audio and video settings. Dramatic movies and comedic movies require different audio and video settings to maximize their appeal to viewers. 
     The current state of television art allows for automatic picture and sound adjustment. However, it requires viewers to manually select the topic and theme of the program using a menu driven remote control system. Then, the television automatically sets the optimal audio and video settings for the current program. 
     Thus, a system which can automatically determine program characteristics such as theme and topic information and use the program characteristics to update current receiver characteristics such as audio and video settings without viewer involvement is desired. 
     SUMMARY OF THE INVENTION 
     The present invention comprises a system and method for determining characteristics such as topic and theme information for a currently televised program and matching that data to a pre-defined table of optimal receiver characteristics, such as audio and video settings, that are stored in a memory unit. The television automatically changes the current audio and video settings to those defined in the pre-defined list which match that program&#39;s topic and theme. 
     The system requires no interaction with viewers. However, if viewers are unhappy with the pre-determined settings, the feature, termed “auto pilot” can be disabled allowing viewers to manually set the receiver characteristics such as audio and video settings to their own liking. 
    
    
     BRIEF DESCRIPTION OF THE DRAWING 
     The foregoing and further features of the invention are illustrated in the accompanying drawings in which: 
     FIG. 1 is a flow diagram of the major block components of the system; 
     FIG. 2 is an example of database information that the system of FIG. 1 utilizes showing the differing settings for various types of programming; and 
     FIG. 3 illustrates a television receiver suitable for use with the invention. 
    
    
     DETAILED DESCRIPTION 
     The auto pilot feature which comprises the present invention operates in television systems such as that shown in FIG. 3 having electronic program guides (EPGs). Electronic program guides are available from a number of sources such as StarSight™ and Thomson DSS™. These sources store program information data which viewers can access to determine what is and what will be showing on the various channels. The present invention uses a computer processor within the television to tap into this EPG data and look for information pertaining to characteristics of the program such as the topic and theme of the program. If this information is available, the system will gather it and compare it against a pre-defined table in the television&#39;s memory. If a match occurs the television will automatically change the audio and video settings to match those in the table based on the program data thereby yielding the optimal viewing conditions. 
     FIG. 1 illustrates a flow diagram of the major block components of the system. First, the television is tuned  10  to a program. Next, it is determined whether the auto pilot feature  12  is switched on or disabled by the viewer. If the auto pilot feature is disabled by the viewer then the picture quality and audio settings remain unchanged  14 . Otherwise, the television looks up  16  the program currently being shown in the EPG database to determine whether that program&#39;s attributes, i.e. topic and theme, appear in the database. If the topic and theme data is not present  18  in the database then the picture quality and audio settings remain unchanged. If, however, the topic and theme are present in the EPG database then those attributes are matched  20  to a pre-defined table in television memory. The pre-defined table contains picture quality and audio setting information for each possible topic and theme combination. The television will automatically adjust  22  the necessary audio and video settings to match those in the pre-defined table for this type of program. The system will remain dormant  24  until another program is tuned at which time the entire process repeats. 
     FIG. 2 is an example of a pre-defined table of database information that the system of FIG. 1 utilizes showing the differing settings for various types of programming. The table has eight (8) columns of available information. The first no two columns denote the topic and theme of a program. The next three columns denote the optimum video settings for contrast, color, and brightness for the topic and theme of the first two columns. The last three columns optimize the audio settings for the topic and theme. These settings include the audio processor (Stadium Surround™, stereo, Dolby Prologic™) and the bass and treble levels. 
     By way of example, assume that a television like the one shown in FIG. 3 has just been tuned to a new program, say an ice hockey game, and that the auto pilot feature is enabled. The levels for the six audio and video settings are at zero from the last program. The television looks up the new program in the EPG database and determines that the program now being viewed is indeed an ice hockey game. Further, an ice hockey game has been pre-defined in memory to have optimal audio and video settings. These settings are then retrieved automatically and the contrast is adjusted to 2, the color level remains at 0, and the brightness set to 4 while the audio processor is set to Stadium Surround™, the bass is adjusted to +2, and the treble remains at 0. If the viewer is dissatisfied with any of these settings then any setting can be subsequently manually adjusted. 
     Next, suppose the viewer has changed the channel again to tune a comic movie. Auto pilot scans the EPG database for the topic and theme of the new program and determines it to be a comedic movie. Auto pilot next retrieves the audio and video settings for a comedic movie. The contrast is adjusted from 2 to +3, color is unchanged, brightness goes from 4 to +1, Stadium Surround™ becomes Dolby ProLogic™, bass is decreased from +2 to +1, and treble is incremented from 0 to +1. The overall effect is designed to provide the optimal viewing and listening settings for each program. The foregoing process is accomplished without the need for viewer interaction. However, should viewers wish to further refine the picture and audio settings they may do so without affecting the auto pilot operation by adjusting picture and audio settings the conventional way. 
     FIG. 3 illustrates a television receiver capable of implementing the invention as described above. Referring to FIG. 3, a television receiver includes an RF input terminal  100  which receives radio frequency (RF) signals and applies them to a tuner assembly  102 . Tuner assembly  102  selects and amplifies a particular RF signal under control of a tuner controller  104  which provides a tuning voltage via a wire  103 , and bandswitching signals via signal fines represented by the broad double ended arrow  103 , to tuner assembly  102 . 
     Tuner assembly  102  converts the received RF signal to an intermediate frequency (IF) signal and provides an IF output signal to video (VIF) and sound (SIF) amplifier and detector unit  130 . VIF/SIF amplifier and detector unit  130  amplifies the IF signal applied to its input terminal and detects the video and audio information contained therein. The detected video information is applied as one input of a video processor unit  155 . The detected audio signal is applied to an audio processor  135  for processing and amplification before being applied to a speaker assembly  136 . 
     Tuner controller  104  generates the tuning voltage and bandswitching signals in response to control signals applied from a system control microcomputer (μC)  110 . The terms “microcomputer”, “controller”, and “microprocessor”, as used herein, are equivalent. It is also recognized that the control function of microcomputer  110  may be performed by an integrated circuit especially manufactured for that specific purpose (i.e., a “custom chip”), and the term “controller”, as used herein, is also intended to include such a device. Microcomputer  110  receives user initiated commands from an infrared (IR) receiver  122  and from a “local” keyboard  120  mounted on the television receiver itself. IR receiver  122  receives IR transmissions from remote control transmitter  125 . Microcomputer  110  includes a central processing unit (CPU)  112 , a program memory (ROM)  114 , and stores channel related data in a random access memory (RAM)  116 . RAM  116  may be either internal to, or external to, microprocessor  110 , and may be either the volatile or non volatile type. The term “RAM” is also intended to include electrically erasable programmable read only memory (EEPROM)  117 . One skilled in the art will recognize that if volatile memory is utilized, that it may be desirable to use a suitable form of standby power (such as from STANDBY POWER SUPPLY  180 ) to preserve its contents when the receiver is turned off. 
     Microcomputer  110  also includes a timer  118  for providing timing signals as needed. Microcomputer (or controller)  110  generates a control signal for causing tuner control unit  104  to control tuner  102  to select a particular RF signal, in response to user entered control signals from local keyboard  120  and from infrared (IR) receiver  122 . IR receiver  122  is powered from Standby Power Supply  180  to be able to receive a command to turn on the receiver. 
     Tuner  102  produces a signal at an intermediate frequency (IF) and applies it to a processing unit  130  comprising a video IF (VIF) amplifying stage, an AFT circuit, a video detector, and a sound IF (SIF) amplifying stage. Processing unit  130  produces a first baseband composite video signal (TV), and a sound carrier signal. The sound carrier signal is applied to an audio signal processing unit  135  which includes an audio detector and may include a stereo decoder. Audio signal processor unit  135  produces a first baseband audio signal and applies it to a speaker unit  136 . Second baseband composite video signals and second baseband audio signals may be applied to VIDEO IN and AUDIO IN terminals from an external source. 
     The first and second baseband video signals (TV) are coupled to a video processor unit  155  (having a selection circuit not shown). Electrically erasable programmable read only memory (EEPROM)  117  is coupled to controller  110 , and serves as a non volatile storage element for storing autoprogramming channel data, and user entered channel data. 
     The processed video signal at the output of video signal processor unit  155 , is applied to a Kine Driver Amplifier  156  for amplification and then applied to the guns of a color picture tube assembly  158  for controlling the deflection of its electron beam. 
     The television receiver may also include closed caption circuitry as follows. A Data Slicer  145  receives closed caption data at a first input from VIF/SIF amplifier and detector unit  130 , and at a second input from the VIDEO IN terminal via a Video Switch  137  which selects the proper source of closed caption data under control of controller  110 . Data Slicer  145  supplies closed caption data to Closed Caption OSD Processor  140  via lines  142  and  143 . Data Slicer  145  supplies closed caption status data (Newdata, Field 1 ) to controller  110 . Under control of controller  110 , via control line  141 , Closed Caption OSD Processor  140  generates character signals, and applies them to an input of video signal processor  155 , for inclusion in the processed video signal. Alternatively, Closed Caption OSD Processor  140  and Data Slicer  145  may be included in controller  110 . 
     System control microcomputer (μC)  110  controls and operates the autopilot feature. Microcomputer  110  receives user initiated commands from infrared (IR) receiver  122 . IR receiver  122  receives IR transmissions from remote control transmitter  125 . Microcomputer  110 , as applied to the present invention, has several functions. First, it determines whether auto pilot unit  126  is enabled. Next, it searches the EPG database to determine whether the current program topic and theme data appear in the EPG database. If topic and theme data is found then microcomputer  110  searches for the same topic and theme combination in the predefined table stored in ROM  114  and extracts the associated predetermined audio and video setting data for that type of program. The last step in the auto pilot process is to have the microcomputer  110  adjust the picture quality settings to those extracted from ROM  114  for the topic and theme of the program. 
     While the invention has been described with reference to the preferred embodiment thereof, it will be appreciated by those of ordinary skill in the art that various modifications can be made to the structure and function of individual parts of the system without departing from the spirit and scope of the invention as a whole.