JP4616155B2 - Television receiver - Google Patents

Description

  The present invention relates to a television receiver in which a plurality of audio output modes are set, and in particular, determines an audio output mode according to a genre added to content as additional information, and outputs audio in the determined audio output mode. The present invention relates to a television receiver.

  Conventionally, in television receivers that output video / audio contents such as programs broadcast from TV stations, multiple audio output modes are set, and the audio output mode is determined according to the genre added to the content as additional information And what outputs a sound in the determined sound output mode is known (for example, refer to patent documents 1).

However, in the related art, the audio output mode corresponding to the genre set for the content is determined. However, depending on the number of content channels, the audio output mode determined according to the genre is not an optimal listening environment. In some cases, there is a problem that an optimal listening environment cannot be realized depending on the number of genres and content channels.
JP 2005-94072 A

  The present invention has been made in view of such problems, and an object of the present invention is to be able to output sound in an audio output mode suitable for the genre and the number of content channels, depending on the number of content channels. It is in providing the television receiver which can implement | achieve the optimal listening environment, without it.

In order to solve the above problems, the present invention has the following configuration.
The television receiver of the present invention is a television receiver having a function of receiving additional information including content and the genre of the content and the number of channels, and the number of output channels corresponding to the genre and the number of channels. The output channel by referring to the audio output mode storage means based on the genre and the number of channels included in the additional information, and an output means comprising a plurality of speakers. When the number of output channels for specifying the number and the number of channels of the content and the number of output channels specified by the number of output channels are different, the number of channels of the content is converted into the number of output channels. ; and a number of output channel conversion unit, Characterized in that to the audio output using the speaker of the number of output channels identified by the serial output channel number specifying means.

Comprising said output means including left and right front speakers and a center speaker, wherein the sound output mode storage unit, the output channel count corresponding to the number of channels more than 2ch is said genre 1ch are at least stored If the number of output channels specified by the output channel number specifying means is 1ch, the left and right front speakers output audio even if the number of channels included in the additional information is 2ch or more. First, the center speaker is used to output sound .

Comprising said output means including left and right front speakers and a center speaker, wherein the sound output mode storage unit, the output channel count corresponding to the number of channels 1ch is said genre of 2ch are at least stored, When the number of output channels specified by the output channel number specifying means is 2ch, even if the number of channels included in the additional information is 1ch or more, no sound is output from the center speaker. Voice output is performed using left and right front speakers .

  Furthermore, the television receiver of the present invention is characterized in that power supply is stopped for the left and right front speakers or the center speaker amplifiers that do not output audio.

  Further, the television receiver of the present invention comprises 3ch output means comprising left and right front speakers and a center speaker, and the output channel number specifying means, when the number of content channels is 1ch, When the number of output channels to be specified includes at least one of 1ch, 2ch, and 3ch, the output channel number conversion means, when 1ch is specified as the number of output channels, When audio is output using only the center speaker without converting the number of channels, and 2ch is specified as the number of output channels, the channel number of the content is converted to 2ch and only the left and right front speakers are used. Audio output and 3ch is specified as the number of output channels. In this case, characterized in that to the audio output by using all of said output means converts the number of channels the content 3ch.

  Furthermore, the television receiver of the present invention comprises 3ch output means consisting of left and right front speakers and a center speaker, and the output channel number specifying means, when the number of content channels is 2ch, When the number of output channels to be specified includes at least one of 1ch, 2ch, and 3ch, the output channel number conversion means, when 1ch is specified as the number of output channels, When the number of channels is converted to 1ch and audio is output using only the center speaker, and 2ch is specified as the number of output channels, only the left and right front speakers are converted without converting the number of channels of the content. Audio output and 3ch is specified as the number of output channels. In this case, characterized in that to the audio output by using all of said output means converts the number of channels the content 3ch.

  Furthermore, the television receiving apparatus of the present invention comprises 3ch output means comprising left and right front speakers and a center speaker, and the output channel number specifying means is provided when the number of content channels is 5.1ch. Has at least one of 1ch, 2ch, and 3ch as options for the number of output channels to be specified, and the output channel number conversion means, when 1ch is specified as the number of output channels, If the number of content channels is converted to 1ch and audio is output using only the center speaker, and 2ch is specified as the number of output channels, the number of content channels is converted to 2ch and the left and right fronts are converted. Audio output using only speakers, 3ch specified as the number of output channels And a case where being characterized in that it is the audio output by using all of said output means converts the number of channels the content 3ch.

  Furthermore, in the television receiver of the present invention, the output means includes a 0.1ch subwoofer, and the output channel number specifying means selects 2.1ch and 3.1ch as options for the number of output channels to be specified. The output channel number converting means converts the number of content channels to 2.1ch and specifies the left and right front speakers and the subwoofer when 2.1ch is specified as the number of output channels. When 3.1ch is specified as the number of output channels, the number of content channels is converted to 3.1ch, and the left and right front speakers, the center speaker, and the subwoofer are It is characterized by using it to output sound.

  The television receiver of the present invention stores the number of output channels corresponding to the combination of the genre and the number of content channels, the number of output channels specified based on the number of genres and the number of content channels, the number of content channels, By changing the number of content channels to the number of output channels when the content is different, it is possible to output audio with the number of output channels suitable for the genre and the number of content channels, so it depends on the number of content channels. There is an effect that an optimal listening environment can be realized.

  Furthermore, when the number of output channels is 1 ch, the television receiver of the present invention is configured so that sound is output only from the center speaker and is not output from the left and right front speakers. If it is output from the left and right front speakers, the phase difference from the left and right front speakers depending on the viewing position makes the sound weaker or stronger depending on the frequency, making it difficult to hear. , It is possible to hear clearly wherever the viewing position is.

  Furthermore, when the number of output channels is 2ch, the television receiver of the present invention is configured so that audio is output from the left and right front speakers and is not output from the center speaker. In some cases, if a monaural component is output to the center speaker, the sound will be heard out of sync or overlap, making it difficult to hear, the center speaker height being different from the left and right front speakers, and the speaker characteristics being centered. If the speaker is different from the left and right front speakers, there is an effect that it is possible to enjoy realistic music without using the center speaker.

  Furthermore, the television receiver of the present invention has an effect that power consumption can be reduced by configuring the left and right front speakers or center speaker amplifiers that do not output sound to stop power supply. .

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of an embodiment of a television receiver according to the present invention, FIG. 2 is a front view of the television receiver shown in FIG. 1, and FIG. 4 is an explanatory diagram for explaining the function of the channel number conversion processing section shown in FIG. 4, FIG. 4 is a configuration diagram of the remote control light receiving section shown in FIG. 1, and FIG. 5 is a genre specification table stored in the memory shown in FIG. FIG. 6 and FIG. 7 are diagrams showing examples of audio output mode tables stored in the memory shown in FIG.

  Referring to FIG. 1, the television receiver 1 of this embodiment includes an antenna 2, a tuner 3, a multiplexing / restoring unit 4, a video decoding unit 5, an audio decoding unit 6, and a content information decoding unit 7. A display unit 8, an audio control unit 9, a system controller 10, left and right front speakers 11L and 11R, a center speaker 11C, a subwoofer 11SW, a noise detection unit 12, a remote control light receiving unit 13, and an amplifier 14L. , 14R, 14C, 14SW, a volume 15, a delay processing unit 16, a memory 17, and an operation unit 18. As shown in FIG. 2, the left and right front speakers 11L and 11R, the center speaker 11C, and the subwoofer 11SW are arranged on the left and right sides of the display unit 8, respectively. A center speaker 11 </ b> C is disposed below 8, and a subwoofer 11 </ b> SW is disposed on the back side of the display unit 8.

  The tuner 3 selects a broadcast signal received by the antenna 2 at a desired frequency and performs demodulation processing. The broadcast signal received by the antenna 2 is analog broadcast, BS analog broadcast, BS digital broadcast, or the like, and the signal demodulated by the tuner 3 includes the video signal and audio signal of the content, and additional information related to the content. It is output to the multiplexing restoration unit 4 as a multiplexed signal that has been divided and combined. The content is not limited to a program supplied by a broadcast signal from a broadcasting station, but includes a program obtained via a network such as the Internet, a program obtained from a recording medium such as a DVD (Digital Versatile Disc), In this case, a multiplexed signal in which the video signal and audio signal of the content and the additional information related to the content are time-division combined is output from the network and the recording medium playback device to the multiplexing restoration unit 4.

  The multiplexing restoration unit 4 separates the multiplexed signal input from the tuner 3 (or a network or a recording medium playback device) into a video signal, an audio signal, and additional information. The separated audio signal is output to the audio decoding unit 6, and the separated additional information is output to the content information decoding unit 7. The additional information is information such as a genre code multiplexed in the input signal and EPG (Electronic Programming Guide), and the genre of content (“movie”, “drama”, “music”, “documentary”, “ News "etc.).

  The video decoding unit 5 decodes the video signal input from the multiplexing / restoration unit 4, and the decoded video signal is displayed on the display unit 8. As the display unit 8, display means such as a liquid crystal display, a plasma display, or a CRT is used.

  The audio decoding unit 6 decodes the audio signal input from the multiplexing / restoration unit 4, and the decoded audio signal is processed by the audio control unit 9 and then the amplifiers 14 </ b> L, 14 </ b> R, 14 </ b> C through the volume 15. , 14SW, and audio is output from the left and right front speakers 11L, 11R, the center speaker 11C, and the subwoofer 11SW.

  The content information decoding unit 7 decodes the additional information input from the multiplexing restoration unit 4 and extracts a genre from the decoded additional information, and the extracted genre is output to the system controller 10 as content information. . When a plurality of genres are set for the same content, that is, when the same content includes a plurality of genres as additional information, the extracted plurality of genres are output to the system controller 10.

  The audio control unit 9 is a sound quality adjusting unit that processes the audio signal decoded by the audio decoding unit 6, and includes a channel number conversion processing unit 91, a sound field change processing unit 92, an enhancement processing unit 93, and an equalizer. And a processing unit 94.

  The channel number conversion processing unit 91 has a function of converting the number of channels of the audio signal decoded by the audio decoding unit 6. As the channel number conversion processing, for example, a 5.1 ch audio signal is converted to 3.1 ch or 1 ch. Down-mix processing to convert 2ch audio signal to 1ch, 3.1ch audio signal to 1ch respectively, virtual surround processing to convert 5.1ch audio signal to 3.1ch or 2ch, and 2ch audio signal to A matrix decoding process for converting to 3.1ch or 5.1ch is performed, and a stereo conversion process for converting a 1ch audio signal to 2ch is performed.

  The sound field change processing unit 92 has a function of changing the sound field, that is, the listening environment. For example, the sweet spot expanding process for expanding the sweet spot, and the speaker position changing process for moving the virtual speaker position outside the speaker. Is done.

  The enhancement processing unit 93 has a function of enhancing the audio output from the center speaker 11C more than the audio output from other speakers. For example, the center enhancement process for amplifying only the audio signal output from the center speaker 11C, the center speaker A balance adjustment process for amplifying the audio signal output from 11C and reducing the audio signal output from another speaker is performed.

  The equalizer processing unit 94 has a function of controlling the sound quality by increasing / decreasing the gain for each frequency band, performing a directivity correction process for correcting the frequency characteristics due to the directivity of the front speakers 11L and 11R, and amplifying the bass sound. Perform bass enhancement processing.

  The noise detection unit 12 includes a microphone that collects noise around the television receiver 1. When the noise level is equal to or higher than a predetermined value, the noise level is equal to or higher than a predetermined value. A noise signal notifying the presence is output to the system controller 10. Note that a remote control 20 is provided with a microphone to collect noise around the remote control 20, and when the noise level around the remote control 20 is equal to or higher than a predetermined value, the remote control light receiving unit 13 is connected from the remote control 20 to the system controller 10. A noise signal may be output via the signal.

  The remote control light receiving unit 13 receives an operation signal (infrared ray) from the remote controller 20, outputs the received operation signal to the system controller 10, detects the distance and direction of the remote controller 20, and detects the position of the detected remote controller 20. Output to the system controller 10. Referring to FIG. 4, the remote control light receiving unit 13 includes light receiving elements 131a, 131b, and 131c having different mounting directions, and the optical directivity of the reception sensitivity of each of the light receiving elements 131a, 131b, and 131c is denoted by reference numeral 132a in FIG. , 132b and 132c are set to cover different areas on the front side of the television receiver 1. Therefore, the position of the remote controller 20 relative to the television receiver 1 can be detected by determining the output levels of the light receiving elements 131a, 131b, and 131c.

  The delay processing unit 16 performs a delay process for delaying either the audio signal output from the left front speaker 11L or the audio signal output from the right front speaker 11R.

  The memory 17 stores the content information extracted by the content information decoding unit 7 and, when a plurality of genres are set for the content, a genre specifying table for specifying the genre of the content, the genre of the content, and the content The audio output mode table in which audio output modes are defined in accordance with various conditions of the number of channels, the position of the remote controller 20 detected by the remote control light receiving unit 13 and the noise level detected by the noise detection unit 12 is stored. Yes.

  As shown in FIG. 5, in the genre specification table, registered genres combining a plurality of genres are defined, and priorities are defined for each genre. In this embodiment, the combination of “movie” + “documentary” is defined as “registered genre A”, the combination of “movie” + “music” is defined as “registered genre B”, and “documentary” ”,“ Drama ”,“ Music ”,“ Movie ”,“ News ”are defined in this order.

  In the audio output mode table, as shown in FIGS. 6 and 7, audio output modes corresponding to various conditions are defined. FIG. 6 is an audio output mode table in which audio output modes corresponding to the genre of content and the number of channels are defined, and the channel number conversion processing performed by the channel number conversion processing unit 91 according to the combination of the genre and the number of channels. And center enhancement processing performed by the enhancement processing unit 93 is defined. FIG. 7 is an audio output mode table in which audio output modes are defined in accordance with the position and noise level of the remote controller 20 and information (time etc.) that can be grasped by the system controller 10. Sweet spot expansion processing and speaker position change processing performed by the sound field change processing unit 92 according to the level and time, center enhancement processing performed by the enhancement processing unit 93, directivity correction processing performed by the equalizer processing unit 94, and A bass enhancement process and a delay process performed by the delay processing unit 16 are defined.

  The operation unit 18 is input means for instructing execution of various operations in the television receiver 1, and inputs such as channel selection instructions, volume adjustment instructions, and the like, and a genre specifying table stored in the memory 17 and New registration, deletion, and change input of the audio output mode table are performed.

  The system controller 10 specifies the genre of the content based on the content information and the genre specification table stored in the memory 17, and specifies the specified genre, the number of content channels, the position of the remote controller 20, the noise level, Based on the time, the audio output mode table is referenced to determine the audio output mode, and the audio control unit 9 and the delay processing unit 16 are controlled according to the determined audio output mode.

Next, the genre specifying operation in the present embodiment will be described in detail with reference to FIG.
FIG. 8 is a flowchart for explaining the genre specifying operation performed by the system controller 10 shown in FIG.

  The system controller 10 ascertains the genre set in the content for video and audio output by referring to the content information stored in the memory 17 as the genre specifying operation of the content for video and audio output. It is determined whether or not the grasped genre is defined in the genre identification table stored in the memory 17 (step A1). If the genre is not defined in the genre identification table (when a plurality of genres are set). If all genres that are set are not defined), they are identified as other genres (step A2).

  If the genre is defined in the genre identification table in step A1 (if a plurality of genres are set, all or any of the set genres are defined), a plurality of genres are included in the content. Is determined (step A3), and if a plurality of genres are not set for the content, the genre set for the content is specified (step A4).

  If a plurality of genres are set in the content in step A3, it is determined whether or not a combination of a plurality of genres is defined as a registered genre in the genre specifying table (step A5), and a combination of a plurality of genres is determined. If it is defined as a registered genre in the genre specifying table, the corresponding registered genre is specified (step A6). If a combination of a plurality of genres is not defined as a registered genre in the genre specifying table, a plurality of genres are specified. The genre having the highest priority among the genres is specified (step A7).

Next, an audio output mode when the audio signal of the content in this embodiment is 1ch will be described in detail with reference to FIG.
FIG. 9 is a flowchart for explaining an audio output mode when the audio signal of the content in the television receiver 1 is 1ch.

  The system controller 10 specifies the genre of the content based on the content information stored in the memory 17 and the genre specification table (step B1), and the audio output mode table based on the specified genre and the number of content channels: 1ch. To determine the audio output mode (step B2).

  Next, the system controller 10 determines whether or not the number of output channels is 1ch in the determined audio output mode (step B3). If the number of output channels is 1ch, the audio controller 9 is used. A 1ch audio signal is output only from the center speaker 11C (step B4). This audio output mode corresponds to a case where the content genre is a voice-centric source such as “documentary” or “news”. When it is a 1ch audio signal and is a voice-centered source, if it is output from the left and right front speakers 11L, 11R, it is weakened or strengthened depending on the frequency due to the phase difference from the left and right front speakers 11L, 11R depending on the viewing position. However, by outputting from only the center speaker 11C, it is possible to clearly hear wherever the viewing position is. Further, when outputting from only the center speaker 11C, it is preferable that the amplifiers 14L, 14R, and 14SW of the unused channels do not use power.

  If the number of output channels is not 1ch in step B3, the system controller 10 determines whether or not the number of output channels is 2ch in the determined audio output mode (step B5), and the number of output channels is 2ch. The channel number conversion processing unit 91 of the audio control unit 9 performs channel number conversion processing for converting a 1ch audio signal into a 2ch audio signal (step B6), and converts the 2ch audio signal to the left and right front speakers 11L and 11R. (Step B7). This audio output mode corresponds to a case where the genre of the content is a music-centric source such as “music”. Further, when outputting from the left and right front speakers 11L and 11R, it is preferable that the amplifiers 14C and 14SW of the unused channels do not use power. Note that as the channel number conversion process in step B6, the 1ch audio signal may be assigned to the left and right as it is and converted to 2ch, or the 1ch audio signal may be converted to 2ch by the stereo conversion process.

  If the number of output channels is not 2ch in step B5, the system controller 10 determines that the number of output channels is 3.1ch in the determined audio output mode, and the channel number conversion processing unit 91 of the audio control unit 9 performs 1ch. The number of channels is converted into a 3.1ch audio signal (step B8), and the 3.1ch audio signal is output from the left and right front speakers 11L and 11R, the center speaker 11C, and the subwoofer 11SW (step B8). B9). This audio output mode corresponds to the case where the content genre is a source of voice + music / sound effect center such as “movie” and “drama”. In the channel number conversion process in step B8, first, the audio signal of 1ch is converted into 2ch by the stereo conversion process, and further converted into 3.1ch or 5.1ch by the matrix decoding process. When converted to 5.1ch, 3.1ch on the front side of the audio signal converted to 5.1ch may be used, and the audio signal converted to 5.1ch may be downmixed. It may be converted to 3.1ch by processing or virtual surround processing. Further, the subwoofer 11SW may not be provided, and in this case, the number is 3ch instead of 3.1ch.

Next, the audio output mode when the audio signal of the content in this embodiment is 2ch will be described in detail with reference to FIG.
FIG. 10 is a flowchart for explaining the audio output mode when the audio signal of the content in the television receiver 1 is 2ch.

  The system controller 10 identifies the genre of the content based on the content information stored in the memory 17 and the genre identification table (step C1), and the audio output mode table based on the identified genre and the number of content channels: 2ch. To determine the audio output mode (step C2).

  Next, the system controller 10 determines whether or not the number of output channels is 1ch in the determined audio output mode (step C3). If the number of output channels is 1ch, the number of channels of the audio control unit 9 is determined. The conversion processing unit 91 performs channel number conversion processing for converting the 2ch audio signal into the 1ch audio signal (step C4), and outputs the 1ch audio signal only from the center speaker 11C (step C5). This audio output mode corresponds to a case where the content genre is a voice-centric source such as “documentary” or “news”. Further, when outputting from only the center speaker 11C, it is preferable that the amplifiers 14L, 14R, and 14SW of the unused channels do not use power. Note that as the channel number conversion process in step C4, a 2ch audio signal is converted to 1ch by a downmix process.

  If the number of output channels is not 1ch in step C3, the system controller 10 determines whether or not the number of output channels is 2ch in the determined audio output mode (step C6), and the number of output channels is 2ch. The audio control unit 9 is used to output 2ch audio signals from the left and right front speakers 11L and 11R (step C7). This audio output mode corresponds to a case where the genre of the content is a music-centric source such as “music”. If the monaural component is output to the center speaker 11C together with the front speakers 11L and 11R in the case of a 2-channel audio signal and a music-centric source, the sound will be misaligned and overlapped, making it difficult to hear. If the height of the center speaker 11C is different from that of the left and right front speakers 11L and 11R as in the present embodiment, or if the speaker characteristics are different between the center speaker 11C and the left and right front speakers 11L and 11R, the center speaker. Those who do not use 11C can enjoy realistic music. Further, when outputting from the left and right front speakers 11L and 11R, it is preferable that the amplifiers 14C and 14SW of the unused channels do not use power. Furthermore, it may be converted into 2.1ch by separating the components from the subwoofer 11SW.

  If the number of output channels is not 2ch in step C6, the system controller 10 determines that the number of output channels is 3.1ch in the determined audio output mode, and the channel number conversion processing unit 91 of the audio control unit 9 performs 2ch. The number of channels is converted into a 3.1ch audio signal (step C8), and the 3.1ch audio signal is output from the left and right front speakers 11L, 11R, the center speaker 11C, and the subwoofer 11SW (step C8). C9). This audio output mode corresponds to the case where the content genre is a source of voice + music / sound effect center such as “movie” and “drama”. As the channel number conversion process in step C8, the audio signal converted into 5.1ch after converting the audio signal of 2ch into 3.1ch or 5.1ch by the matrix decoding process is converted into 5.1ch. The front side 3.1ch may be used, and the audio signal converted to 5.1ch may be converted to 3.1ch by downmix processing or virtual surround processing. Furthermore, after converting the audio signal of 2ch into 3ch, the component with the subwoofer 11SW may be divided and converted into 3.1ch. In addition, there is no need for a subwoofer. In this case, 3ch is used instead of 3.1ch.

Next, the audio output mode when the audio signal of the content in this embodiment is 5.1 ch will be described in detail with reference to FIG.
FIG. 11 is a flowchart for explaining an audio output mode when the audio signal of the content in the television receiver 1 is 5.1 ch.

  The system controller 10 identifies the genre of the content based on the content information stored in the memory 17 and the genre identification table (step D1), and outputs audio based on the identified genre and the number of content channels: 5.1ch. The audio output mode is determined with reference to the mode table (step D2).

  Next, the system controller 10 determines whether or not the number of output channels is 1ch in the determined audio output mode (step D3). If the number of output channels is 1ch, the number of channels of the audio control unit 9 is determined. The conversion processing unit 91 performs channel number conversion processing for converting the 5.1ch audio signal into the 1ch audio signal (step D4), and outputs the 1ch audio signal only from the center speaker 11C (step D5). This audio output mode corresponds to a case where the content genre is a voice-centric source such as “documentary” or “news”. Further, when outputting from only the center speaker 11C, it is preferable that the amplifiers 14L, 14R, and 14SW of the unused channels do not use power. Note that as the channel number conversion process in step D4, the 5.1h audio signal may be converted to 1ch by downmix processing, and the 5.1h audio signal is converted to 2ch or 3.1ch by virtual surround processing. After conversion to 1ch, it may be converted to 1ch by downmix processing.

  When the number of output channels is not 1ch in step D3, the system controller 10 determines whether or not the number of output channels is 2ch in the determined audio output mode (step D6), and the number of output channels is 2ch. The channel number conversion processing unit 91 of the audio control unit 9 performs channel number conversion processing for converting a 5.1ch audio signal into a 2ch audio signal (step D7), and the audio control unit 9 is used to convert 2ch audio. A signal is output from the left and right front speakers 11L and 11R (step D8). This audio output mode corresponds to a case where the genre of the content is a music-centric source such as “music”. Further, when outputting from the left and right front speakers 11L and 11R, it is preferable that the amplifiers 14C and 14SW of the unused channels do not use power. Note that as the channel number conversion process in step D7, it is preferable to convert the 5.1h audio signal into 2ch by downmix process or virtual surround process. Furthermore, it may be converted into 2.1ch by separating the components from the subwoofer 11SW.

  If the number of output channels is not 2ch in step D6, the system controller 10 determines that the number of output channels is 3.1ch in the determined audio output mode, and the channel number conversion processing unit 91 of the audio control unit 9 determines that the number of output channels is 5ch. A channel number conversion process is performed to convert a .1ch audio signal to a 3.1ch audio signal (step D9), and it is determined whether or not center enhancement processing is set in the determined audio output mode (step D10). Note that, as the channel number conversion processing in step D9, it is preferable to convert the 5.1h audio signal to 3.1ch by downmix processing or virtual surround processing. Further, the subwoofer 11SW is not necessary, and in this case, the number is 3ch instead of 3.1ch.

  If the center emphasis process is not set in step D10, the system controller 10 causes 3.1ch audio signals to be output from the left and right front speakers 11L and 11R, the center speaker 11C, and the subwoofer 11SW (step D11). This audio output mode corresponds to the case where the content genre is a source of voice + music / sound effect center such as “movie” and “drama”.

  When center enhancement processing is set in step D10, the system controller 10 performs center enhancement processing for enhancing the audio output from the center speaker 11C more than the audio output from other speakers using the enhancement processing unit 93. In step D12, 3.1ch audio signals are output from the left and right front speakers 11L and 11R, the center speaker 11C, and the subwoofer 11SW (step D11). This audio output mode corresponds to a case where the content genre is a voice + music / sound effect-centered source such as “movie”, “drama”, etc., but the voice weight is higher than that of the music / sound effect. As the center emphasis process in step D10, only the audio signal output from the center speaker 11C may be amplified, or the audio signal output from the center speaker 11C is amplified and output from another speaker. The audio signal may be reduced. Alternatively, the audio signal output from the other speaker may be reduced without changing the audio signal output from the center speaker 11C. The processing of D10 and D12 can be similarly performed when the audio signal of the content is 1ch or 2ch and the output is 3ch or 3.1ch. In the case of 1ch, it is inserted between B8 and B9, and in the case of 2ch, it is inserted between C8 and C9. Further, when the content audio signal is 2ch, as means for converting to 3ch or 3.1ch, in the setting of the center emphasis process, the output of the left front speaker 11L before the center emphasis process is L, and the right front speaker 11R is Is output by R, α is output from the left front speaker 11L, R / α is output from the right front speaker 11R, and {(R + L) (α -1)} / α. Α is 2? Α ??, and the larger α is, the larger the proportion of the center speaker 11C is.

Next, the audio output mode corresponding to the position of the remote controller 20 in the present embodiment will be described in detail with reference to FIGS.
FIG. 12 is a flowchart for explaining the audio output mode corresponding to the position of the remote controller 20 in the television receiver 1, and FIG. 13 is an explanatory diagram for explaining the position of the remote controller 20 shown in FIG. FIG. 14 is an explanatory diagram for explaining the directivity correction processing performed by the equalizer processing unit 94 shown in FIG.

  In the present embodiment, it is assumed that the position of the remote controller 20 is the trial listening position, and the audio output mode corresponding to the position of the remote controller 20 is determined. First, the system controller 10 determines the position of the remote controller 20 input from the remote controller light receiving unit 13 (step E1). In step E1, the remote controller 20 is “displaced from the center”, “is the displacement more than a predetermined angle β”, “is separated by a predetermined distance x”, or “is separated by a predetermined distance y (x <y) or more”. Do it? In the example illustrated in FIG. 13, this corresponds to the determination of whether the remote controller 20 at the position a is “displaced from the center” and “is apart from the predetermined distance x”. This corresponds to the determination of “Is the shift greater than or equal to the predetermined angle β”, and corresponds to the determination of whether the remote control 20 at the position c is separated by a predetermined distance y (x <y) or more. The remote controller 20 at the position c is not located on the center, but is assumed to be almost the center if it is within 5 ° from the center, for example. In the present embodiment, x <y, but x = y or x> y may be used.

  The system controller 10 determines whether it is deviated from the center (step E2). If it is determined that it is deviated from the center, the audio data is stored in the memory 17 by referring to the audio output mode table. The equalizer processing unit 94 of the control unit 9 performs directivity correction processing (step E3), and the delay processing unit 16 performs delay processing (step E4).

  The directivity correction process in step E3 is a process of increasing the gain of a high frequency, and is controlled so that the sound pressure level of each frequency becomes flat even when the sample is listened to at a position shifted from the center. That is, as shown in FIG. 14 (a), the loudspeaker characteristics tend to decrease the sound pressure level at higher frequencies as it deviates from the center, and the gain at higher frequencies is increased as shown in FIG. 14 (b). Thus, as shown in FIG. 14 (c), the sound pressure level of each frequency can be flattened even at a position (30 °) deviated from the center, and a high frequency according to the angle of the listening position deviated from the center. The amount of gain increase is controlled.

  The delay process in step E4 is a process of delaying either the audio signal output from the left front speaker 11L or the audio signal output from the right front speaker 11R, and the remote controller 20 is positioned as shown in FIG. In the case of a, the distance l between the remote controller 20 and the left front speaker 11L is longer than the distance r between the remote controller 20 and the right front speaker 11R. The audio signal output from the right front speaker 11R is delayed by a minute time, and the arrival times of the audio from the left front speaker 11L and the audio from the right front speaker 11R can be matched. Furthermore, the balance of L and R at the listening position may be made the same by adjusting the volume output from the left and right speakers.

  If the system controller 10 determines in step E2 that it is deviated from the center, it further determines whether the deviation is greater than or equal to a predetermined angle β (step E5), and determines that the deviation is greater than or equal to the predetermined angle β. In this case, the sweet spot expansion process is performed by the sound field change processing unit 92 of the audio control unit 9 by referring to the audio output mode table stored in the memory 17 (step E6). Enlargement of the sweet spot by the sweet spot enlargement process is effective when it is deviated from the center, but the sound is monaural near the center and has an adverse effect. Therefore, the deviation of the listening position is more than a predetermined angle β from the center. Only when it is determined that there is a sweet spot enlargement process. The directivity correction process in step E3 and the delay process in step E4 may be set to be turned off, for example, for a plurality of viewers. Similarly, the sweet spot enlargement process in step E6 may be set to be turned off, for example, for one viewer.

  When the system controller 10 determines that the deviation is from the center in step E2 and the deviation is determined to be greater than or equal to the predetermined angle β in step E5, the system controller 10 further determines whether “the distance is greater than or equal to the predetermined distance x”. (Step E7) When it is determined that the distance is greater than or equal to the predetermined distance x, the equalizer processing unit 94 of the audio control unit 9 performs bass enhancement processing (Step E8). As the sound is farther away from the speaker, the bass component becomes smaller than the others, so that the bass enhancement process is performed when it is determined that the listening position is more than the predetermined distance x.

  If the system controller 10 determines that it is not deviated from the center in step E2, it further determines whether it is separated by a predetermined distance y (step E9), and determines that it is separated by a predetermined distance y or more. The speaker position changing process is performed by the sound field changing process part 92 of the audio control part 9 (step E10), and the process reaches step E7. For example, the optimum angle for viewing an image in high-definition broadcasting is 33 ° and the sound is preferably 60 °. However, since the positions of the left and right front speakers 11L and 11R are adjacent to the display unit 8, the display is performed. When there is a certain distance from the section 8 and the center is almost the listening position, the speaker position changing process is performed. The speaker position changing process performs a process of expanding the position of the virtual speaker by signal processing such as a stereo enhancer.

  Next, the audio mode determination operation according to the volume in the present embodiment will be described in detail.

  When the volume is set to be smaller than a predetermined volume value by operating the operation unit 18 or the remote controller 20, the system controller 10 is conditioned on the condition that the volume is smaller than the predetermined volume value. The audio output mode is determined by referring to the audio output mode table.

  When the volume is smaller than a predetermined volume value set in advance, center enhancement processing is set as the audio output mode to be determined, and the system controller 10 performs center enhancement processing by the enhancement processing unit 93 of the audio control unit 9. By performing the above, the voice output from the center speaker 11C is emphasized more than the voice output from the other speakers, and it is easy to hear voices such as speech.

  Next, the voice mode determination operation according to the noise level in the present embodiment will be described in detail.

  If the noise level detected by the noise detection unit 12 is equal to or higher than a predetermined value, the system controller 10 refers to the audio output mode table on the condition that the noise level is equal to or higher than a predetermined value. By doing so, the audio output mode is determined.

  When the noise level is equal to or higher than a predetermined value, center enhancement processing is set as the audio output mode to be determined, and the system controller 10 performs center enhancement processing by the enhancement processing unit 93 of the audio control unit 9. By performing the above, the voice output from the center speaker 11C is emphasized more than the voice output from other speakers, and it is easy to listen to voices such as lines without being influenced by noise.

  Next, the voice mode determination operation according to the time in the present embodiment will be described in detail.

  The system controller 10 has a clock function. When the time is nighttime (for example, PM11: 0 to AM5: 00), the system controller 10 refers to the voice output mode table on condition that the time is nighttime. Determine the output mode.

  When the time is night, center enhancement processing is set as the audio output mode to be determined, and the system controller 10 performs the bass enhancement processing by the enhancement processing unit 93 of the audio control unit 9, thereby the center speaker. The sound output from 11C is emphasized more than the sound output from other speakers, and the noise to the neighborhood is reduced. In the center enhancement processing, the center component may be increased with respect to the L and R components, the L and R components may be decreased with respect to the center component, the center component is increased, and the L and R components are decreased. May be.

  In this embodiment, the center emphasis processing is performed by the emphasis processing unit 93 of the audio control unit 9 according to various conditions. However, the remote control 20 or the operation unit 18 is connected to the independent volume (or the center speaker 11C). (Balance adjustment) may be provided so that the viewer can perform center enhancement.

  In the above description, each condition has been described individually. However, when a plurality of conditions are overlapped, each audio output mode is applied. However, the sweet spot enlargement process and the speaker position change process performed by the sound field change processing unit 92 of the audio control unit 9 and the center enhancement process performed by the enhancement processing unit 93 of the audio control unit 9 have output channels of 3. The directivity correction processing performed by the equalizer processing unit 94 of the audio control unit 9 and the delay processing performed by the delay processing unit 16 are limited to the case where the output channel is 2ch or more. And

  Furthermore, in the television receiver 1 of the present embodiment, the subwoofer 11SW is provided and configured to be compatible with 3.1ch. However, the subwoofer 11SW is not necessarily provided, and in the case where the subwoofer 11SW is not provided, a channel is provided. The number conversion processing unit 91 may convert the number of channels to 3 ch instead of 3.1 ch. In this case, the output component of the subwoofer may be distributed to other speakers or may not be output. Similarly, 2.1ch output is 2ch output.

  As described above, according to the present embodiment, the number of output channels corresponding to the combination of the genre and the number of content channels is stored in the memory 17, and the system controller 10 is based on the number of genre and content channels. If the number of output channels specified in this way is different from the number of content channels, the surround processing unit 91 converts the number of content channels into the number of output channels, which is suitable for the genre and the number of content channels. Since audio can be output with the number of output channels, an optimum listening environment can be realized without being influenced by the number of content channels.

  Furthermore, according to the present embodiment, when the number of output channels is 1 ch, the voice is output from only the center speaker 11C, and the voice is not output from the left and right front speakers 11L and 11R. When the signal is output from the left and right front speakers 11L and 11R when the source is the central source, it becomes difficult to hear because the phase difference from the left and right front speakers 11L and 11R is weakened or strengthened depending on the viewing position. By outputting only from the center speaker 11C, there is an effect that it is possible to clearly hear wherever the viewing position is.

  Furthermore, according to the present embodiment, when the number of output channels is 2 ch, the audio is output from the left and right front speakers 11L and 11R, and the audio is not output from the center speaker 11C. If the monaural component is output to the center speaker 11C in the case of the source of the sound source, it becomes difficult to hear because the sound is shifted or overlapped, and the height of the center speaker 11C is different from the left and right front speakers 11L and 11R. If the center speaker 11C and the left and right front speakers 11L and 11R have different speaker characteristics, there is an effect that the person who does not use the center speaker 11C can enjoy realistic music.

  Furthermore, according to the present embodiment, power consumption can be reduced by configuring the amplifiers of the left and right front speakers 11L, 11R or the center speaker 11C that do not output sound to stop power supply. There is an effect.

  Note that the present invention is not limited to the above-described embodiments, and it is obvious that the embodiments can be appropriately changed within the scope of the technical idea of the present invention. In addition, the number, position, shape, and the like of the constituent members are not limited to the above-described embodiment, and can be set to a suitable number, position, shape, and the like in practicing the present invention. In each figure, the same numerals are given to the same component.

It is a block diagram which shows the structure of embodiment of the television receiver which concerns on this invention. It is a front view of the television receiver shown in FIG. It is explanatory drawing explaining the function of the channel number conversion process part shown in FIG. It is a block diagram of the remote control light-receiving part shown in FIG. It is a figure which shows the example of a genre specific table memorize | stored in the memory shown in FIG. It is a figure which shows the example of the audio | voice output mode table memorize | stored in the memory shown in FIG. It is a figure which shows the example of the audio | voice output mode table memorize | stored in the memory shown in FIG. It is a flowchart for demonstrating the genre specific operation | movement performed with the system controller shown in FIG. It is a flowchart for demonstrating the audio | voice output mode in case the audio signal of the content in 1 embodiment of the television receiver which concerns on this invention is 1ch. It is a flowchart for demonstrating audio | voice output mode in case the audio signal of the content in 2 embodiment of the television receiver which concerns on this invention is 2ch. It is a flowchart for demonstrating audio | voice output mode determination operation | movement in case embodiment of the television receiver which concerns on this invention is an audio | voice signal is 5.1ch. It is a flowchart for demonstrating the audio | voice output mode according to the position of the remote control in embodiment of the television receiver which concerns on this invention. It is explanatory drawing for demonstrating the position of the remote control shown in FIG. It is explanatory drawing for demonstrating the directivity correction process performed in the equalizer process part shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Television receiver 2 Antenna 3 Tuner 4 Multiplexing decompression | restoration part 5 Video decoding part 6 Audio | voice decoding part 7 Content information decoding part 8 Display part 9 Audio control part 10 System controller (output channel number specific means)
11L Left front speaker 11R Right front speaker 11C Center speaker 11SW Subwoofer 12 Noise detection unit 13 Remote control light receiving unit 14L, 14R, 14C, 14SW Amplifier 15 Volume 16 Delay processing unit 17 Memory (Audio output mode storage means)
18 Operation unit 20 Remote control 91 Channel number conversion processing unit (output channel number conversion means)
92 Sound field change processing unit 93 Enhancement processing unit 94 Equalizer processing unit 131a, 131b, 131c Light receiving element 132a, 132b, 132c Directivity

Claims (8)

A television receiver having a function of receiving additional information including the content genre and the number of channels together with the content,
Audio output mode storage means for storing the number of output channels corresponding to the genre and the number of channels;
Output means comprising a plurality of speakers;
Output channel number specifying means for specifying the number of output channels by referring to the audio output mode storage means based on the genre and the number of channels included in the additional information;
Output channel number converting means for converting the number of content channels into the number of output channels when the number of content channels and the number of output channels specified by the output channel number specifying means are different ;
A television receiver which outputs sound using the speakers of the number of output channels specified by the output channel number specifying means . Comprising said output means including left and right front speakers and a center speaker,
The audio output mode storage means stores at least the genre of which the number of output channels is 1ch corresponding to the number of channels of 2ch or more,
When the number of output channels specified by the output channel number specifying means is 1 ch, audio is not output from the left and right front speakers even if the number of channels included in the additional information is 2 ch or more. 2. The television receiver according to claim 1, wherein the center speaker is used to output sound. Comprising said output means including left and right front speakers and a center speaker,
The audio output mode storage means stores at least the genre of 2ch output channels corresponding to the number of channels of 1ch,
When the number of output channels specified by the output channel number specifying means is 2ch, even if the number of channels included in the additional information is 1ch or more, no sound is output from the center speaker. 3. The television receiver according to claim 1, wherein audio is output using left and right front speakers.   4. The television receiver according to claim 2, wherein power supply to the left and right front speakers or the center speaker amplifiers that are not output is stopped. Comprising 3ch of said output means comprising left and right front speakers and a center speaker;
The output channel number specifying means has at least one of 1ch, 2ch, and 3ch as options for the number of output channels to be specified when the number of channels of the content is 1ch.
When the number of output channels is specified as 1 ch, the output channel number conversion means outputs audio using only the center speaker without converting the number of channels of the content, and the number of output channels is 2 ch. When specified, the number of channels of the content is converted to 2ch, and audio is output using only the left and right front speakers. When 3ch is specified as the number of output channels, the number of channels of the content 5. The television receiver according to claim 1, wherein the audio signal is converted into 3 ch and audio is output using all of the output means. 6. Comprising 3ch of said output means comprising left and right front speakers and a center speaker;
The output channel number specifying means has at least one of 1ch, 2ch, and 3ch as options of the number of output channels to be specified when the number of channels of the content is 2ch,
When the number of output channels is specified as 1 ch, the output channel number converting means converts the number of content channels to 1 ch and outputs audio using only the center speaker, and the number of output channels is 2 ch. Is specified, audio is output using only the left and right front speakers without converting the number of content channels, and when 3ch is specified as the number of output channels, the number of content channels The television receiver according to claim 1, wherein the audio signal is converted into 3 ch and audio is output using all of the output means. Comprising 3ch of said output means comprising left and right front speakers and a center speaker;
The output channel number specifying means has at least one of 1ch, 2ch, and 3ch as options of the number of output channels to be specified when the number of channels of the content is 5.1ch,
When the number of output channels is specified as 1 ch, the output channel number converting means converts the number of content channels to 1 ch and outputs audio using only the center speaker, and the number of output channels is 2 ch. If the channel number of the content is converted to 2ch and audio is output using only the left and right front speakers, and the channel number of the content is specified as 3ch, 7. The television receiver according to claim 1, wherein the number is converted into 3ch and audio is output using all of the output means. The output means includes a 0.1ch subwoofer,
The output channel number specifying means has 2.1ch and 3.1ch as options of the number of output channels to be specified,
The output channel number converting means converts the number of content channels to 2.1ch when the number of output channels is specified as 2.1ch, and uses the left and right front speakers and the subwoofer to When 3.1 ch is specified as the number of output channels, the number of content channels is converted to 3.1 ch and audio is output using the left and right front speakers, the center speaker, and the subwoofer. A television receiver according to any one of claims 5 to 7.

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