JP4713396B2 - Video / audio reproduction device and sound image moving method thereof - Google Patents

Description

  The present invention relates to a video / audio reproduction device (such as a television receiver) having a center speaker and left and right speakers, and in particular, outputs a center speaker audio component from left and right speakers to move a sound image, thereby making the sound image and image match. The present invention relates to an improved video / audio reproduction device.

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).
JP 2005-94072 A

  However, in the conventional technology, although the sound output mode is determined according to the genre, the position of the sound image formed by the sound of the speaker does not match the position of the image displayed on the display device depending on the genre, and the user feels uncomfortable There is. In particular, in the case of a voice-centric source such as news, it often happens that the sound image formed by the speaker sound does not match the announcer's face position.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a television receiver capable of enhancing the coincidence between the sound image formed by the sound of the speaker and the image displayed on the display device. An apparatus (video / audio reproduction apparatus) is provided.

In order to solve the above problems, the present invention has the following configuration.
The video / audio reproduction device of the present invention includes a display unit, a left front speaker and a right front speaker respectively provided on both sides of the display unit, and an upper side of the display unit on a substantially vertical axis of symmetry of the left and right front speakers. Alternatively, in a video / audio reproduction device including a center speaker provided on the lower side, a genre specifying table in which a registered genre combining a plurality of genres is defined and a priority order is defined for each genre, and the content registration Audio output mode table in which an audio output mode corresponding to a combination of a genre including a genre and the number of content channels is defined, and when a plurality of genres are set in the additional information of the input content, defined in the genre specifying table Based on the registered genre or priority order A genre specifying means for specifying the genre of the input content, and an audio output mode corresponding to a combination of the genre specified by the genre specifying means and the number of channels of the content based on the audio output mode table. A channel number conversion processing unit that converts the number of content channels into the number of output channels according to the audio output mode; and the left and right front speakers when the number of output channels is the number of channels for outputting a center speaker audio signal. you comprising the center image processing means for outputting an audio signal for the center speaker.
Also, the video and audio reproducing apparatus of the present invention, the number of output channels after the conversion in the channel number conversion process unit is characterized in that the 1ch or 3.1ch.
The video / audio reproduction device of the present invention is characterized in that the audio signal for the center speaker is added to the audio signal for the left and right front speakers and is output.
Further, the sound image moving method of the present invention includes a display unit, a left front speaker and a right front speaker provided on both sides of the display unit, and a substantially vertical symmetry axis of the left and right front speakers, in the sound image movement method of the video and audio reproduction apparatus and a center speaker provided in the upper or lower side, it stores the genre specified table defining priority for each genre as well as define the registration genre that combines multiple genres When the audio output mode table defining the audio output mode corresponding to the combination of the genre including the registered genre of the content and the number of channels of the content is stored, and a plurality of genres are set in the additional information of the input content , The registered genre or defined in the genre specifying table The genre of the input content is specified based on the priority, and the audio output mode corresponding to the combination of the specified genre of the content and the number of channels of the content is specified based on the audio output mode table. the center speaker sound to the front left and right speakers when is said to convert the number of channels the content to the output channel number corresponding to the audio output mode, the output channel count is the number of channels for outputting an audio signal for center speaker you and moving a sound image which outputs a signal formed by voice signal the center speaker to the center of the display unit.
Also, the sound image moving method of the present invention, the number of the output channel after the number of channel conversion is characterized in that it is a 1ch or 3.1ch.
The sound image moving method of the present invention is characterized in that the center speaker audio signal is added to the left and right front speaker audio signals and output.

  The video / audio reproduction device (such as a television receiver) according to the present invention outputs the center speaker audio component from the left and right speakers and moves the sound image to display the sound image formed by the sound of the speaker and the display device. Image matching can be enhanced. In addition, the DSP processing is less than in the case of using a filter that simulates the head-related transfer function, and power consumption can be suppressed.

  As a technique for moving a sound image, there is a conventional technique for creating a virtual speaker by moving a virtual speaker by providing a filter simulating a head-related transfer function, for example, a technique proposed in Japanese Patent Laid-Open No. 5-207597. However, if a filter that simulates the head-related transfer function is used, the head-related transfer function cannot be completely simulated, and there is a problem that sound quality deteriorates. The sound image moving method according to the present invention can be realized by distributing the sound signal of the center speaker, and has a feature that the sound quality is not deteriorated.

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

  FIG. 1 is a block diagram showing the configuration of an embodiment of a television receiver (video / audio player) according to the present invention, and FIG. 2 is a front view of the television receiver shown in FIG. 3 is an explanatory diagram for explaining the function of the channel number conversion processing unit shown in FIG. 1, FIG. 4 is a diagram showing an example of a genre specifying table stored in the memory shown in FIG. 1, and FIG. It is a figure which shows the example of the audio | voice output mode table memorize | 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 remote control light receiving unit 13, and amplifiers 14L, 14R, 14C and 14SW. A volume 15, a memory 17, and an operation unit 18. 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 as shown in FIG. The center speaker 11C is arranged on the substantially vertical symmetry axis 21 of the left and right front speakers 11L and 11R and below the display unit 8, and the subwoofer 11SW is arranged on the back side of the display unit 8, respectively.

  The tuner 3 selects a channel having a desired frequency from the broadcast signal received by the antenna 2 and performs demodulation processing. Note that broadcast signals received by the antenna 2 are terrestrial digital broadcast, BS digital broadcast, 110-degree CS digital broadcast, and the like, and signals demodulated by the tuner 3 are content video and audio signals and additional information related to the content. The information is output to the multiplexing restoration unit 4 as a multiplexed signal that is time-division 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 video signal, audio signal, and additional information of the program to be viewed based on the multiplexed signal input from the tuner 3 (or a network or a recording medium playback device), and separates the video signal. Are output to the video decoding unit 5, 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 means for processing the audio signal decoded by the audio decoding unit 6, and includes a channel number conversion processing unit 91 and a center sound image processing unit 92.

  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, 2 ch. Down-mix processing to convert 3.1ch audio signal to 1ch, 2ch audio signal to 1ch, 1ch, virtual surround processing to convert 5.1ch audio signal to 3.1ch or 2ch, 2ch A matrix decoding process for converting the audio signal to 5.1ch or 3.1ch, a stereo conversion process for converting the 1ch audio signal to 2ch, and the like are performed.

  The center sound image processing unit 92 has a function of changing the position of the sound image, and outputs the center speaker sound component from the left and right speakers 11L and 11R to move the sound image from the position of the center speaker 11C to the image side of the display unit 8. Speaker position change processing is performed.

  The remote controller light receiving unit 13 receives an operation signal (infrared rays) from the remote controller 20 and outputs the received operation signal to the system controller 10.

  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, and the genre and channel of the content Audio output mode tables in which audio output modes corresponding to the numbers are defined are stored.

  In the genre specification table, as shown in FIG. 4, 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.

  FIG. 5 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 sound image processing performed by the center sound image processing unit 92 are defined. However, in FIG. 5, the portion where the channel number conversion processing column is a horizontal line indicates that the conversion processing is not performed and the number of channels is left as it is, and the portion where the horizontal line in the center sound image processing column is This indicates that center sound image processing is not performed.

  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 stored in the memory 17 and the genre specification table, and refers to the audio output mode table based on the specified genre and the number of content channels. The audio output mode is determined, and the audio control unit 9 is 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. 6 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. 7 is a flowchart for explaining the 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 audio output mode determined in step B2 (step B3). If the number of output channels is 1ch, the audio controller 9 Is used to output an audio signal for one channel of the center speaker 11C (step B4). This audio output mode corresponds to a case where the genre of the content is a voice-centric source such as “Documentary” or “News” or a voice + music / sound effect-centric source such as “Movie” or “Drama”. 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.

  If the number of output channels is not 1ch in step B3, the system controller 10 determines that the number of output channels in the audio output mode determined in step B2 is 2ch, and the channel number conversion processing unit 91 of the audio control unit 9 A channel number conversion process for converting a 1ch audio signal into a 2ch audio signal is performed (step B5), and audio signals for 2ch of the left and right front speakers 11L and 11R are output (step B6). 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 B5, 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.

  Step B7 is a process of distributing and outputting the audio signal output for the center speaker in steps B4 and B6 to the center speaker 11C and the left and right front speakers 11L and 11R at a predetermined ratio. This processing is performed by the center sound image processing unit 92. By outputting the audio signal output for the center speaker also to the left and right front speakers 11L and 11R, the sound image formed by the center speaker 11C is closer to the image side of the display unit than when the center speaker 11C outputs only. Moving. This is because the sound image moves due to the sound effect of the left and right front speakers 11L and 11R. Furthermore, when applied to a television receiver as in the present embodiment, the sound image matches the position of the image that is producing sound when the viewer views the video displayed on the display unit 8 with the eyes. Psychological effects act so that a more consistent sound image can be obtained.

  8 and 9 conceptually show the sound signal distribution processing of the center sound image processing unit 92. Reference numerals 93 to 95 denote amplifying units, and 96 and 97 denote audio signal adding units. In addition, the same code | symbol as FIG. 1 has shown the same component.

  In FIG. 8, the audio signal C output for the center speaker in step B4 is output from the center speaker 11C to the volume 15 as it is, and is attenuated by −12 db by the amplifying units 93 and 94 (attenuated by 0.0631 times). ) The case where the audio signals are added to the audio signals L and R of the left and right front speakers by the adders 96 and 97 and output to the volume 15 as the audio signal L ′ for the left front speaker and the audio signal R ′ for the right front speaker is shown. ing. The subwoofer audio signal SW is output as it is. In the above description, the audio signal C output for the center speaker is attenuated by −12 db by the amplifiers 93 and 94 and added to the audio signals L and R of the left and right front speakers, but this is an example. If the sound signals are attenuated to -9 dB to -15 dB and added to the audio signals L and R of the left and right front speakers, the effect of the center sound image processing according to the present invention can be obtained.

  In FIG. 9, the audio signal C output for the center speaker in step B4 is attenuated by −0.6 db (attenuated 0.871 times) and output to the volume 15 as the center speaker audio signal C ′. The audio signal attenuated by −12 db (attenuated by 0.0631 times) is added to the audio signals L and R of the left and right front speakers, and the audio signal L ′ for the left front speaker and the audio signal R ′ for the right front speaker As shown in FIG.

  In the case of FIG. 9, since the audio signals attenuated by −0.6 db for the center speaker and −12 db for the left and right front speakers are allocated, the total output power can be made constant. In the case of FIG. 8, the total output power is not constant, but can be implemented with a simple configuration. In the case of FIG. 9, the audio signal C output for the center speaker is attenuated by −12 db by the amplifying units 93 and 94 and added to the audio signals L and R of the left and right front speakers. If it is attenuated to −9 dB to −15 dB and added to the audio signals L and R of the left and right front speakers, the effect of the center sound image processing according to the present invention can be obtained. In addition, the audio signal C output for the center speaker is attenuated by −0.6 db and output as the center speaker audio signal C ′. However, this is also an example, and −1.3 dB to −0. If it is attenuated to 3 dB and output as the center speaker audio signal C ′, the effect of the center sound image processing according to the present invention can be obtained.

  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 audio output mode determined in step C2 (step C3). If the number of output channels is 1ch, the audio controller 9 The channel number 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 audio signal for 1ch of 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”. 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 audio output mode determined in step C2 (step C6), and the number of output channels is 2ch. If so, the audio control unit 9 is used to output audio signals for 2ch of 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.

  When 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 audio output mode determined in step C2, and the channel number conversion processing unit of the audio control unit 9 91, channel number conversion processing is performed to convert a 2ch audio signal into a 3.1ch audio signal (step C8), and 3.1ch audio signals for the left and right front speakers 11L and 11R, the center speaker 11C, and the subwoofer 11SW are obtained. Output (step 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.

  Step C10 is a process of distributing and outputting the audio signal output for the center speaker in steps C5 and C9 to the center speaker 11C and the left and right front speakers 11L and 11R at a predetermined ratio. This processing is performed by the center sound image processing unit 92. This center sound image processing has the same operations and effects as described in step B7.

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 audio output mode determined in step D2 (step D3). If the number of output channels is 1ch, the audio controller 9 The channel number conversion processing unit 91 performs channel number conversion processing for converting a 5.1ch audio signal into a 1ch audio signal (step D4), and outputs an audio signal for 1ch of 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”. 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.

  If 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 audio output mode determined in step D2 (step D6), and the number of output channels is 2ch. In this case, 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. Audio signals for 2ch of the left and right front speakers 11L and 11R are 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 audio output mode determined in step D2, and the channel number conversion processing unit of the audio control unit 9 In step D9, a channel number conversion process is performed to convert a 5.1ch audio signal to a 3.1ch audio signal. 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.

  In the above description, the television receiver 1 according to the present embodiment is configured with 3.1 ch. However, a new 2 ch speaker may be added to the rear, and a 5.1 ch configuration may be used. In this case, if the number of output channels is not 2ch in step D6, the number of output channels may be 5.1ch, and the channel number conversion processing unit 91 of the audio control unit 9 may not perform any conversion processing ( Step D9). With such a configuration, the signal is also output to the 2ch speaker newly added at the rear, so that the surround feeling is further enhanced.

  In step D10, the system controller 10 outputs audio signals for 3.1ch of 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”.

  Step D11 is a process of distributing and outputting the audio signal output for the center speaker in steps D5 and D10 to the center speaker 11C and the left and right front speakers 11L and 11R at a predetermined ratio. This processing is performed by the center sound image processing unit 92. This center sound image processing has the same operations and effects as described in steps B7 and C10.

  In the above description, in the present embodiment, the audio output mode is determined from the genre of content and the number of channels in FIG. 5, but may be determined from only the genre or the number of channels. For example, in FIG. 5, when the genre is “music”, the number of output channels is converted to 2ch, and when the genre is “documentary” or “news”, it is converted to 1ch. In the case of a specific genre, the number of output channels can be determined corresponding to the genre. The center sound image processing ON / OFF processing can also be determined according to the genre. When determining the number of output channels from the number of content channels, for example, as shown in FIG. 12 as another example of the audio output mode table, the number of output channels is converted in accordance with the number of input channels. Can do. In the example shown in FIG. 12, the center speaker audio signal is converted into the number of output channels (1ch or 3.1ch) corresponding to the number of input channels so that center sound image processing can be performed. . In the example of FIG. 12, conversion is not performed when the number of content channels is 1ch, but conversion is performed to 3.1ch when the content is 2ch, and conversion to 3.1ch is performed when the content is 5.1ch.

  In the above description, the television receiver 1 according to the present embodiment is provided with the subwoofer 11SW so as to be compatible with 3.1ch. However, the subwoofer 11SW is not necessarily provided, and the subwoofer 11SW is not provided. In this case, the channel 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.

  In the above description, the center speaker 11C is arranged on the substantially vertical symmetry axis 21 of the left and right front speakers 11L and 11R and below the display unit 8. However, the center speaker 11C is an abbreviation of the left and right front speakers 11L and 11R. Even if it is arranged on the vertical symmetry axis 21 and on the upper side of the display unit 8, it can be similarly implemented.

  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.

  The present invention can be used not only for a television receiver but also for a video / audio reproduction device including a video display device and an audio output device.

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 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 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 conceptual diagram which shows the distribution process of the audio | voice signal of the center sound image process part in embodiment of the television receiver which concerns on this invention. It is a conceptual diagram which shows the other sort process of the audio | voice signal of the center sound image process part in embodiment of the television receiver which concerns on this invention. 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 figure which shows the other example of the audio | voice output mode table memorize | stored in the memory shown in FIG.

Explanation of symbols

1 ... TV receiver (video / audio playback device)
DESCRIPTION OF SYMBOLS 2 ... Antenna 3 ... Tuner 4 ... Demultiplexing part 5 ... Video decoding part 6 ... Audio decoding part 7 ... Content information decoding part 8 ... Display part 9 ... Audio controller 10 ... System controller 11L ... Left front speaker 11R ... Right front speaker 11C ... Center speaker 11SW ... Subwoofer 13 ... Remote control light receiver 14L, 14R, 14C, 14SW ... Amplifier 15 ... Volume 17 ... Memory (memory means)
DESCRIPTION OF SYMBOLS 18 ... Operation part 20 ... Remote control 21 ... Vertical symmetry axis 91 ... Channel number conversion process part 92 ... Center sound image process part 93, 94, 95 ... Amplification part 96, 97 ...・ Addition part

Claims (6)

A display unit, a left front speaker and a right front speaker respectively provided on both sides of the display unit, and a center speaker provided on the upper or lower side of the display unit on a substantially vertical axis of symmetry of the left and right front speakers. In a video and audio playback device comprising:
A genre specifying table in which a registered genre combining a plurality of genres is defined and a priority order is defined for each genre;
An audio output mode table in which audio output modes corresponding to a combination of a genre including the registered genre of content and the number of channels of the content are defined;
When a plurality of genres are set in the additional information of the input content, genre specifying means for specifying the genre of the input content based on the registered genre or the priority order defined in the genre specifying table;
An audio output mode corresponding to the combination of the genre specified by the genre specifying means and the number of channels of the content is specified based on the audio output mode table,
A channel number conversion processing unit that converts the number of channels of the content into the number of output channels according to the specified audio output mode ;
An audio / video reproduction apparatus comprising center sound image processing means for outputting the center speaker audio signal to the left and right front speakers when the number of output channels is the number of channels for outputting a center speaker audio signal. The video / audio reproduction device according to claim 1 , wherein the number of output channels after conversion by the channel number conversion processing unit is 1ch or 3.1ch. The audio / video reproduction apparatus according to claim 1, wherein the audio signal for the center speaker is added to the audio signal for the left and right front speakers and output. A display unit, a left front speaker and a right front speaker respectively provided on both sides of the display unit, and a center speaker provided on the upper or lower side of the display unit on a substantially vertical axis of symmetry of the left and right front speakers. In a sound image moving method of a video / audio reproduction device comprising:
Define a registered genre that combines multiple genres and store a genre specification table that defines priorities for each genre,
Storing an audio output mode table defining audio output modes corresponding to a combination of a genre including the registered genre of content and the number of channels of the content;
When a plurality of genres are set in the additional information of the input content, the genre of the input content is specified based on the registered genre or the priority order defined in the genre specifying table,
An audio output mode corresponding to a combination of the specified genre of the content and the number of channels of the content is specified based on the audio output mode table,
According to the specified audio output mode, the number of channels of the content is converted into the number of output channels,
And it outputs an audio signal for the center speaker to the left and right front speakers when the output channel count is the number of channels for outputting an audio signal for center speaker
Sound image wherein the moving the sound image formed by the audio signal for the center speaker to the center of the display unit. 5. The sound image moving method according to claim 4 , wherein the number of output channels after channel number conversion is 1ch or 3.1ch. 6. The sound image moving method according to claim 4, wherein the center speaker sound signal is added to the left and right front speaker sound signals and output.

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