JP2009094796A - Television receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a television receiver enabling a user to listen to a favorite music while viewing a TV program, and capable of preventing a BGM inserted in the TV program from being hard to be heard since the user's music overlaps the BGM. <P>SOLUTION: The television receiver includes configurations of (1) suppressing or muting the user's music during the period of the program's BGM (program's BGM priority), (2) passing only a speaking part of program voice with a bandpass filter, and synthesizing it with the user's music (user's music priority), (3) enabling the user to determine whether the programs' BGM or the user's music should be prioritized, and (4) delaying the program voice for a detection time of the program's BGM when a BGM detection part detects that the BGM is inserted from a sound signal of the program. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a television receiver capable of simultaneously listening to externally input music while viewing a television broadcast.

  Conventionally, a television receiver can watch a television broadcast program received by a tuner, and can switch video and audio signals input from an external input terminal to the television broadcast program and output them from display means and speaker means. It was possible.

  In addition, as disclosed in Patent Document 1, when television broadcasting ends, a proposal has been made to read and view a still image slide or BGM from a home server or a storage medium.

On the other hand, as disclosed in Patent Document 2 and Patent Document 3, a proposal has been made to detect a scene in which BGM is inserted into a television broadcast program, thereby detecting a highlight scene of the program.
JP 2002-218331 A JP 2004-140675 A JP 2006-14085 A

  However, in the above-described conventional television receiver, when the externally input audio (hereinafter referred to as user music) is simultaneously played while viewing the video and audio of the television broadcast program, There was a problem that BGM inserted in highlight scenes and user music overlapped, making it difficult to hear.

  Further, this problem cannot be solved by using any of Patent Document 1, Patent Document 2, and Patent Document 3.

  Therefore, an object of the present invention is to provide a television receiver that can solve the above-described problem by detecting that BGM is inserted from an audio signal in a program in a BGM detection unit.

  In order to solve the above-described problems, a first embodiment of the present invention is a television receiver that receives a television broadcast and can view program video and program audio. A voice synthesizing unit that synthesizes and outputs a signal and an external audio input signal; and detects BGM from the program audio signal, and controls the voice synthesizing unit to suppress the external audio input signal when BGM is detected And BGM detecting means.

  The second embodiment of the present invention relates to an external audio input means, a program audio signal, and an external audio input signal in a television receiver that receives a television broadcast and makes it possible to view program video and program audio. Voice synthesis means for outputting, and BGM detection means for detecting the BGM from the program voice signal and controlling the voice synthesis means so as to suppress the voice other than the speech of the program voice signal when the BGM is detected. Furthermore, it is characterized by having.

  In the third embodiment of the present invention, in a television receiver that receives a television broadcast and makes it possible to view program video and program audio, the external audio input means, the program audio signal, and the external audio input signal are combined. Audio synthesizing means for output, user I / F means for receiving priority selection between a program audio signal from the user and an external audio input signal, BGM is detected from the program audio signal, and the program audio signal is detected by the user I / F means When priority is selected and BGM is detected from the program audio signal, the external audio input signal is suppressed, otherwise external audio input signal priority is selected by the user I / F means, and from the program audio signal And BGM detecting means for controlling the voice synthesizing means so as to suppress voices other than the speech of the program audio signal when BGM is detected.

  The fourth embodiment of the present invention provides an external audio input means and a delay means for delaying a program audio signal for a desired time in a television receiver that receives a television broadcast and makes it possible to view program video and program audio. A voice synthesizing unit that synthesizes and outputs the delayed program audio signal and the external audio input signal, and detects BGM from the program audio signal, and suppresses the external audio input signal when BGM is detected. BGM detection means for controlling the voice synthesis means, and the delay time is a time required to detect BGM from the program audio signal.

  According to the present invention, it is reduced that it becomes difficult to listen to favorite music while watching a television broadcast program, and favorite music is synthesized as BGM in scenes other than the highlight of the program (mostly no BGM). And enjoy it.

Next, details of the present invention will be described in accordance with the description of the embodiment.
[First embodiment]
The first embodiment of the present invention is configured to suppress or mute user music during the program BGM period when the BGM detection unit detects that the BGM is inserted from the audio signal in the program (program BGM). priority).

  The first embodiment of the present invention will now be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration example of a television receiver according to the first embodiment of the present invention. This block includes a tuner unit 101, a demultiplexer unit 102, an audio decoder unit 103, a video decoder unit 104, an external input unit 105, a BGM detection unit 106, a voice synthesis unit 107, an amplifier unit 108, a speaker unit 109, and a display control unit 110. The display unit 111. However, a solid line indicates a data line and a broken line indicates a control line.

(Tuner part)
The television broadcast signal received from the antenna is input to the tuner unit 101, information on the channel to be received (frequency, transport stream ID) is obtained from the demultiplexer unit 102, the frequency is switched, and a desired TS (transport) Stream) signal.

(Demultiplexer part)
The TS signal is demultiplexed into an MPEG (Moving Picture Experts Group) -2 audio stream, video stream, and PSI (Program Specific Information) section in the demultiplexer unit 102, and the audio stream is sent to the audio decoder unit 103. The video stream is output to the video decoder unit 104. In the PSI section, SI (Service Information) necessary for obtaining information about the program is acquired and used for controlling the tuner means.

(Audio decoder part)
The audio decoder 103 is described in the ARIB (Radio Industry Association) standard “ARIB STD-B21 Chapter 6 6.2 Audio Decoding Processing and Output” for the audio stream input from the demultiplexer 102 described above. Audio decoding processing is performed and output to the BGM detection unit 106 and the speech synthesis unit 107.

(Video decoder part)
The video decoder unit 104 performs the video decoding process described in the ARIB standard document “ARIB STD-B21 Chapter 6 6.1 Video Decoding Process and Output” on the video stream input from the demultiplexer unit 102 described above. The decoded video signal is output to the display control unit 111 described later.

(External input section)
The external input unit 105 is an I / F unit for inputting user music such as an analog audio signal via an RCA connector and an optical digital audio signal via S / PDIF (Sony Philips Digital InterFace) from an external audio device. The input user music is output to the speech synthesizer 107 described later. The external input unit 105 may be a memory card I / F such as an SD (Secure Digital) memory card. In this case, a general-purpose compressed audio such as MP3 (MPEG-1 Audio Layer-3) in the SD memory card is used. Means for reading and decoding the file is provided in the external input unit.

(BGM detector)
The BGM detection unit 106 analyzes the program audio signal output from the audio decoder unit 103 described above, and detects whether or not BGM is inserted into the program.

  The BGM is detected based on whether or not a low frequency component of 400 Hz or less outside the human voice frequency band and a high frequency component of 400 KHz or more are included above the threshold. Further, as disclosed in Patent Document 2, detection may be performed from signal patterns specific to various musical instruments or signal patterns specific to music different from human voices.

(Speech synthesizer)
The voice synthesis unit 107 synthesizes the television program voice signal input from the audio decoder unit 103 described above and the user music input from the external input unit 105 described above, and outputs the synthesized music to the amplifier unit 108. Further, the volume control at the time of synthesis is performed according to the determination result of the BGM detection unit 106 described above.

  Here, the operation of the speech synthesizer will be described with reference to the block diagram of FIG. 2 and the flowchart of FIG. In the first embodiment of the present invention, when it is detected that BGM is inserted in a program (S1001), the volume control unit 1072 suppresses the volume of the user music (S1002) and gives priority to the program BGM. Control to do. Otherwise, if it is determined that no BGM is inserted in the program, the volume is not suppressed and the user music is output to the synthesizing unit 1071 as it is. The volume-adjusted user music and the program audio input from the audio decoder unit 103 are combined by the combining unit 1071 and output to the amplifier unit 108 (S1003).

(Amplifier part, speaker part)
The audio signal output from the above-described audio synthesis unit 107 is amplified by the amplifier unit 108 and output from the speaker unit 109.

(Display control unit, display unit)
The video signal decoded by the video decoder unit 104 described above is converted into a signal that can be displayed on the display unit 111 by the display control unit 110 and displayed on the display unit 111.

With the above configuration, users can listen to their favorite music at the same time while watching a television program, and when the BGM is inserted into the television program, the user music is automatically suppressed. Therefore, it becomes possible to avoid being difficult to hear.
[Second Embodiment]
In the second embodiment of the present invention, when the BGM detecting unit detects that BGM is inserted from the audio signal in the program, the program audio is heard only in the speech part and synthesized with the user music. (User music priority).

  Now, a second embodiment of the present invention will be described in detail with reference to the drawings. The overall configuration of the second embodiment of the present invention is the configuration of FIG. 1 as in the first embodiment of the present invention, and only the speech synthesizer 107 is different. Therefore, only the speech synthesis unit 107 will be described with reference to the block diagram of FIG. 3 and the flowchart of FIG.

  When the BGM detection unit 106 detects that the BGM is inserted from the audio signal in the program (S1101), the audio signal of the television broadcast decoded by the audio decoder unit 103 is not a line in the BGM suppression unit 1073. Is suppressed (S1102). Otherwise, if it is determined that no BGM is inserted, the process in the BGM suppression unit 1073 is passed through. The program audio signal output from the BGM suppression unit 1073 and the user music input from the external input unit 105 are combined by the combining unit 1074 and output to the amplifier unit 108 (S1103).

  However, the BGM suppression performed by the BGM suppression unit 1073 is performed by suppressing the high frequency component (4 kHz or higher) and the low frequency component (400 Hz or lower) of the program BGM using a bandpass filter.

By configuring as described above, the user can listen to the favorite music at the same time while watching the television program. When BGM is inserted in the television program, it is inserted in the television program. Since only BGM is automatically suppressed, it is possible to avoid difficulty in listening.
[Third embodiment]
In the third embodiment of the present invention, when the BGM detection unit detects that the BGM is inserted from the audio signal in the program, the user can select which of the program BGM and the user music has priority. is there.

  Now, a third embodiment of the present invention will be described in detail with reference to the drawings. The overall configuration of the third embodiment of the present invention is shown in FIG. This block includes a tuner unit 401, a demultiplexer unit 402, an audio decoder unit 403, a video decoder unit 404, an external input unit 405, a BGM detection unit 406, a user I / F unit 407, a voice synthesis unit 408, an amplifier unit 409, a speaker. The unit 410 includes a display control unit 411 and a display unit 412.

  Since the third embodiment of the present invention is the same as the first embodiment of the present invention except for the user I / F unit 407 and the speech synthesis unit 408, the description thereof is omitted.

  Now, the user I / F unit 407 and the speech synthesis unit 408 will be described with reference to the block diagram of FIG. 5 and the flowchart of FIG.

  The user I / F unit 407 is a user I / F for selecting whether the user gives priority to the program BGM or user music, and the BGM detection unit 406 controls the speech synthesis unit 408 based on this selection. .

  When the BGM detection unit 406 detects that BGM is inserted from the audio signal in the program (S1201), if the program BGM has priority, the volume adjustment unit 4082 suppresses the volume of the user music (S1203) In addition, the BGM detection unit 406 performs control. Otherwise, if the user music has priority, the BGM control unit 406 controls the audio signal of the television broadcast so that the BGM suppression unit 4083 suppresses audio other than speech (S1204). Otherwise, if it is determined in step S1201 that no BGM is inserted, the processing in the volume adjusting unit 4082 and the BGM suppressing unit 4083 is passed through. The program audio signal and the user music are synthesized by the synthesis unit 4081 and output to the amplifier unit 409 (S1205).

With the above configuration, the user can listen to his / her favorite music at the same time while watching a television program. If BGM is inserted in the television program, the user's music or television Since the BGM inserted in the John program is automatically suppressed, it is possible to avoid difficulty in listening.
[Fourth embodiment]
First, the gist of the fourth embodiment of the present invention will be described with reference to the conceptual diagrams of FIGS. 6 to 8 show the audio level on the vertical axis and the time on the horizontal axis. For example, in the case of the first embodiment of the present invention, the user is detected from the time when BGM insertion in the program is detected as shown in FIG. Control the music level to be given priority to the program BGM. If the time required for detecting the BGM insertion in this program is short, the user music and the program BGM do not overlap each other as shown in FIG. However, if it is desired to take a long program BGM detection time to prevent false detection, the user music and the program BGM overlap each other during the TOL period, as shown in FIG. .

  Therefore, the fourth embodiment of the present invention adds means for delaying the program audio data before synthesizing.

  The overall configuration of the fourth embodiment of the present invention is shown in FIG. This block includes a tuner unit 901, a demultiplexer unit 902, an audio decoder unit 903, a video decoder unit 904, an external input unit 905, a BGM detection unit 906, a delay unit 907, a voice synthesis unit 908, an amplifier unit 909, a speaker unit 910, It consists of a display control unit 911 and a display unit 912. In the fourth embodiment of the present invention, a delay unit 907 is added between the audio decoder unit 903 and the audio synthesis unit 908, and the decoded program audio data is delayed for a predetermined time. The predetermined time is set based on the time required for BGM insertion detection in the program performed by the BGM detection unit 906. It goes without saying that the BGM detection unit 906 performs BGM detection using a program audio signal that is not delayed.

  The fourth embodiment of the present invention is the same as the first embodiment of the present invention except for the delay unit 907, and the description thereof will be omitted.

  Further, the configuration in which the delay unit according to the fourth embodiment of the present invention is added is not only the first embodiment of the present invention (program BGM priority), but also the second embodiment of the present invention (user music priority), Needless to say, the present invention can also be applied to the third embodiment of the present invention (user preference is given to which is preferred).

The block diagram for demonstrating the whole structure concerning 1st embodiment of this invention The block diagram for demonstrating the structure of the speech synthesis part concerning 1st embodiment of this invention. The block diagram for demonstrating the structure of the speech synthesizer concerning 2nd embodiment of this invention. The block diagram for demonstrating the whole structure concerning 3rd embodiment of this invention. The block diagram for demonstrating the structure of the speech synthesizer concerning 3rd embodiment of this invention. Conceptual diagram for explaining a fourth embodiment of the present invention Conceptual diagram for explaining a fourth embodiment of the present invention Conceptual diagram for explaining a fourth embodiment of the present invention The block diagram for demonstrating the whole structure concerning 4th Embodiment of this invention. The flowchart for demonstrating the BGM detection process concerning 1st embodiment of this invention The flowchart for demonstrating the BGM detection process concerning 2nd embodiment of this invention The flowchart for demonstrating the BGM detection process concerning 3rd embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Tuner part 102 Demultiplexer part 103 Audio decoder part 104 Video decoder part 105 External input part 106 BGM detection part 107 Speech synthesis part 108 Amplifier part 109 Speaker part 110 Display control part 111 Display part 1071 Synthesis part 1072 Volume adjustment part 1073 BGM suppression Unit 1074 synthesis unit 401 tuner unit 402 demultiplexer unit 403 audio decoder unit 404 video decoder unit 405 external input unit 406 BGM detection unit 407 user I / F unit 408 voice synthesis unit 409 amplifier unit 410 speaker unit 411 display control unit 412 display unit 4081 Combining unit 4082 Volume adjusting unit 4083 BGM suppressing unit 901 Tuner unit 902 Demultiplexer unit 903 Audio decoder unit 904 Video decoder unit 905 External input 906 BGM detecting unit 907 delay section 908 the speech synthesis unit 909 amplifier unit 910 speaker 911 display control unit 912 display unit

Claims (4)

  In a television receiver that receives television broadcast and makes it possible to view program video and program audio, external audio input means, audio synthesis means for synthesizing and outputting the program audio signal and the external audio input signal, and program audio signal A television receiver further comprising: BGM detecting means for detecting the BGM from the audio signal and controlling the voice synthesizing means so as to suppress the external voice input signal when the BGM is detected.   In a television receiver that receives television broadcast and makes it possible to view program video and program audio, external audio input means, audio synthesis means for synthesizing and outputting the program audio signal and the external audio input signal, and program audio signal And BGM detecting means for controlling the voice synthesizing means so as to suppress the voice other than the speech of the program audio signal when BGM is detected. Machine.   In a television receiver that receives a television broadcast and can view program video and program audio, an external audio input means, a voice synthesis means for synthesizing and outputting a program audio signal and an external audio input signal, and a user User I / F means that receives priority selection between a program audio signal and an external audio input signal, BGM is detected from the program audio signal, program audio signal priority is selected by the user I / F means, and from the program audio signal If BGM is detected, the external audio input signal is suppressed. Otherwise, external audio input signal priority is selected by the user I / F means, and if BGM is detected from the program audio signal, the program audio is detected. A television receiver further comprising BGM detecting means for controlling the voice synthesizing means so as to suppress voice other than speech of the signal.   In a television receiver for receiving television broadcast and enabling viewing of program video and program audio, external audio input means, delay means for delaying a program audio signal for a fixed time, and the delayed program audio signal and external A voice synthesizing unit that synthesizes and outputs the audio input signal; and a BGM detecting unit that detects the BGM from the program audio signal and controls the voice synthesizing unit to suppress the external audio input signal when the BGM is detected. And the delay time is a time required to detect BGM from the program audio signal.

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