Patent Publication Number: US-2010118212-A1

Title: Multimedia Playing Method and Multimedia Playing Device Thereof

Description:
CROSS REFERENCE TO RELATED PATENT APPLICATION 
     This patent application is based on Taiwan, R.O.C. patent application No. 97143852 filed on Nov. 13, 2008. 
     FIELD OF THE INVENTION 
     The present invention relates to a multimedia playing method and a multimedia playing device thereof, and more particularly, to a multimedia playing method capable of playing a multimedia signal stream according to user requirements and program information included in a received multimedia signal, and a multimedia playing device thereof. 
     BACKGROUND OF THE INVENTION 
     Generally speaking, a cable television (TV) or digital broadband TV system provider, that provides programs to households, transmits multimedia signals to subscribers using an audio mode provided by the channels. Therefore, when the cable TV or the digital broadband TV plays multimedia signals of different channels, audio playing quality is rather different according to different channels or types of programs. With respect to hardware, an equalizer inside a TV is directly altered to change a frequency response of an audio signal to further enhance or weaken a signal having a predetermined frequency and obtain expected audio playing quality. However, audio playing quality of different channels may vary. When the frequency response is changed via the equalizer, the signal having the predetermined frequency may be erroneously enhanced or weakened, and hence the audio playing quality may actually deteriorate and the expected audio playing quality is not achieved. 
     SUMMARY OF THE INVENTION 
     In order to solve the problem of the prior art, a TV program playing method capable of selecting a preferred audio mode according to TV program information to be played and a TV program playing system thereof are provided. 
     A multimedia playing method of adjusting an audio mode according to a TV program is provided. The multimedia playing method comprises steps of receiving a multimedia signal comprising a TV program, analyzing the multimedia signal to obtain program information related to the TV program, retrieving an audio mode from an audio mode database according to the program information, processing the multimedia signal according to the audio mode, and playing the processed multimedia signal. 
     A multimedia playing device capable of adjusting an audio mode according to a TV program is provided. The multimedia device comprises a receiver, an information analyzer, an audio mode database, an audio processing circuit, and a playing unit. The receiver receives a multimedia signal comprising a TV program. The information analyzer, coupled to the receiver, analyzes the multimedia signal to obtain program information related to the TV program. The audio mode database, coupled to the information analyzer, generates an audio mode according to the program information. The audio processing circuit, coupled to the receiver and the audio mode database, processes the multimedia signal according to the audio mode. The playing unit, coupled to the audio processing circuit, plays the processed multimedia signal. 
     The automatic audio adjusting mode according to the present invention provides a viewer with better flexibility in choosing an audio mode, such that the viewer is able to choose between a predetermined audio mode of the multimedia signal and a preferred audio mode that meets the view&#39;s needs in listening to the played multimedia signal as provided by the invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic diagram of a multimedia playing device in accordance with the present invention. 
         FIG. 2  is a flow chart of a multimedia playing method in accordance with the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       FIG. 1  shows a schematic diagram of a TV program playing system in accordance with the present invention. A TV program playing system  100  comprises a receiver  102 , an information analyzer  104 , an audio mode database  106 , a playing unit  108 , and an audio processing circuit  110 . In a preferred embodiment of the present invention, the receiver  102  is a multimedia signal stream receiver for receiving an input of a multimedia signal comprising a TV program. The playing unit  108  is a multimedia playing device for playing the multimedia signal processed by the audio processing circuit  110 . The audio processing circuit  110  is an equalizer in a preferred embodiment. The information analyzer  104 , coupled to the receiver  102 , analyzes the multimedia signal received by the receiver  102  to obtain program information related to the TV program. The audio mode database  106 , coupled to the information analyzer  104 , generates an audio mode according to the program information. The audio processing circuit  110 , coupled to the receiver  102  and the audio mode database  106 , processes the multimedia signal according to the audio mode generated from the audio mode database  106 . The playing unit  108 , coupled to the audio processing circuit  110 , plays the multimedia signal processed by the audio processing circuit  110 . The audio processing circuit  110  equalizes a frequency response corresponding to the audio mode and processes the multimedia signal according to the frequency response. 
     After the receiver  102  receives the multimedia signal, the information analyzer  104  analyzes the multimedia signal comprising various kinds of playing related channel information, such as a channel number, a channel name, service information, and an image characteristic corresponding to a multimedia signal stream. The characteristics obtained by the information analyzer  104  are provided to play the TV program included in the multimedia signal for reference. For example, when the channel of the TV program corresponding to the multimedia signal is a sports channel or a movie channel, characteristics related to the sports channel or the movie channel are found in the playing related information included in the multimedia signal. A frequency response of a sports program or a movie program is determined according to the characteristics to play the TV program included in the multimedia signal, so that audio quality perceived by a viewer is greatly improved. In the foregoing characteristics, the channel number, the channel name, the service information are intuitive characteristics for learning the type of the TV program. When the audio mode is determined according to the image characteristic, a channel identification trademark displayed in an image of TV program information is used for determining a corresponding channel. Generally, well-known TV program channels place the channel identification trademark at a predetermined position when a TV program is played. For example, a well-known sports channel called the Entertainment and Sports Programming Network (ESPN), or a well-known movie channel called the Home Box Office (HBO), places the channel identification trademark at a predetermined position of an image when a TV program is played. The image having the channel identification trademark is identified via an optical character recognition (OCR) technology according to the present invention. The channel identification trademark is compared with a predetermined trademark, and accordingly an appropriate audio mode is chosen to play the TV program according to a multimedia playing method of the present invention. 
     The audio mode database  106 , stored with a plurality of audio modes, retrieves an audio mode corresponding to the TV program analyzed by the information analyzer  104 . The retrieved audio mode is provided to the audio processing circuit  110  for processing the multimedia signal. The audio processing circuit  110  then processes the multimedia signal according to the audio mode generated from the audio mode database  106 . The audio processing circuit  110  equalizes a frequency response corresponding to the audio mode and processes the multimedia signal according to the frequency response. The playing unit  108  plays the TV program included in the multimedia signal according to the multimedia signal processed by the audio processing circuit  110 . 
     In a preferred embodiment of the present invention, a multimedia playing device  100  has an automatic audio adjusting mode. When the automatic audio adjusting mode is activated, the multimedia playing device  100  plays the TV program included in a processed multimedia signal according to the foregoing steps. When the automatic audio adjusting mode is deactivated, the foregoing steps are skipped, and the multimedia signal is directly played by a predetermined audio mode of the received multimedia signal. That is to say, a user determines whether to activate the automatic audio adjusting mode according to one&#39;s needs to listen to the processed multimedia signal, or to accept the predetermined audio of the multimedia signal. 
     For instance, when the automatic audio adjusting mode is activated and the TV program of the TV program information is a sports program, the audio processing circuit  110  generates audio with a more tense rhythm to replace the predetermined audio mode of the program. Optionally, when the TV program of the TV program information is a movie program, the audio processing circuit  110  generates audio more appropriate for the viewer to listen to according to the audio mode of the audio mode database  106 . The more appropriate audio replaces an original audio of the movie program. Conversely, when the automatic audio adjusting mode is deactivated, the audio processing circuit  110  directly finds the predetermined audio mode from the received multimedia signal and plays the multimedia signal according to the predetermined audio mode. 
       FIG. 2  shows a flow chart of a multimedia playing method according to the present invention. The multimedia playing method begins with Step  202 . In Step  204 , a multimedia signal comprising a TV program is received. In Step  206 , whether an automatic audio adjusting mode is activated by a user is checked. When the automatic audio adjusting mode is activated, Step  208  is executed. Otherwise, Step  216  is performed. In Step  208 , the multimedia signal is analyzed to obtain program information related to the TV program. In Step  210 , an audio mode is retrieved from an audio mode database according to the program information. In Step  212 , the multimedia signal is processed according to the audio mode. In Step  214 , the processed multimedia signal is played. In Step  216 , the multimedia signal is played according to a predetermined audio mode of the multimedia signal. 
     It is to be noted that, in a preferred embodiment of the present invention, Step  210  further comprises determining the audio mode retrieved from the audio mode database  106  according to an image characteristic included in the multimedia signal. 
     A multimedia playing device and a method thereof are provided according to the present invention. A type of a TV program that is part of a multimedia signal is classified by analyzing the received multimedia signal having various kinds of information, such as channel information or a channel identification trademark comprised in an image characteristic of program information. When an automatic audio adjusting mode is activated, the multimedia is played in accordance with an audio mode that is more appropriate for the type of the TV program. The audio mode is selected from an audio mode database according to the type of the TV program. The automatic audio adjusting mode according to the present invention provides better flexibility for a viewer in choosing an audio mode, such that the viewer is able to choose between a predetermined audio mode of the multimedia signal or a preferred audio mode that meets the view&#39;s needs in listening to the played multimedia signal. 
     While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not to be limited to the above embodiments. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.