JP4122450B2 - Client / server system - Google Patents

Description

  The present invention relates to a client / server system.

  Conventionally, an audio apparatus capable of outputting multi-channel audio information is known. In such an audio device, for example, a center speaker, left and right front speakers, and left and right rear speakers are generally connected to the audio device body by connection cords. Met. However, in particular, since the left and right rear speakers are installed at a position distant from the audio device main body, the connection cord for connecting the left and right rear speakers crosses the room where the audio device is installed, and the connection cord is in the way. There was a problem that the beauty of the room was damaged.

Therefore, an audio device has been proposed in which the audio device main body and the left and right rear speakers can communicate wirelessly. Specifically, for example, an audio device that wirelessly transmits “rear left” and “rear right” audio information from the main body of the audio device to the left and right rear speakers using a highly confidential modulation method (for example, Patent Documents). 1) was proposed. In addition, for example, an audio system (for example, see Patent Document 2) that wirelessly transmits high-quality audio information without being interfered by crosstalk or other radio waves has been proposed.
Utility Model Registration No. 3072057 JP-A-11-178088

Incidentally, in recent years, a client / server system is known in which AV (Audio and Visual) information including audio information and video information is acquired from an external device on the server device side, and the AV information is output on the client terminal device side. In such a client / server system, AV information is wirelessly transmitted from the server device to the client terminal device.
For example, when the external device is a DVD (Digital Versatile Disc) player or a digital broadcast tuner, the audio information is multi-channel audio information. At this time, if the audio information of “rear left” and “rear right” is output from the left and right rear speakers connected to the client terminal device with the connection cord, for example, the connection code is the same as the conventional audio device. There is a problem that the aesthetics in the room is impaired. Therefore, the client terminal device is assumed to be, for example, the audio device main body described in Patent Document 1 or the audio system main body described in Patent Document 2, and “Rear Left” and “Rear Right” are transferred from the client terminal device to the left and right rear speakers. In this case, in addition to the existing wireless transmission path for transmitting AV information from the server device to the client terminal device, the left and right rear speakers are connected to the rear left and right speakers. ”And“ rear right ”audio information is required to be transmitted, and the wireless transmission path becomes complicated.

  An object of the present invention is to provide a multi-channel audio information compatible client / server system that has a simple wireless transmission path and appearance.

  In order to solve the above-mentioned problem, the invention described in claim 1 is a server apparatus having a first communication means for transmitting AV information including compressed multi-channel audio information and video information, and the server apparatus. In a client / server system comprising: a client terminal device having a second communication unit that is connected via a wireless network and receives AV information transmitted by the first communication unit, the client terminal device includes: Restoring means for restoring AV information received by the second communication means, and uncompressed audio information of one or more first channels among the multi-channel audio information of the AV information restored by the restoring means, First output control means for outputting to the first audio output means, and multi-channel of AV information restored by the restoration means A first channel in which uncompressed audio information of one or more second channels different from the first channel is output to the first audio output unit by the first output control unit. Transmission control means for transmitting to the first communication means via the second communication means while synchronizing with the non-compressed audio information of the server, wherein the server device uses the transmission control means to Second output control means for causing the second sound output means to output the uncompressed sound information of the second channel transmitted via the communication means and received by the first communication means. Features.

  According to a second aspect of the present invention, there is provided a server device having first communication means for transmitting compressed multi-channel audio information, and the server device connected to the server device via a wireless network, and transmitted by the first communication means. And a client terminal system having a second communication means for receiving the received multi-channel audio information, wherein the client terminal apparatus receives the multi-channel audio information received by the second communication means. Restoring means for restoring, and first output control means for causing the first audio output means to output uncompressed audio information of one or more first channels among the multi-channel audio information restored by the restoring means. And one or more second channels of the multi-channel audio information restored by the restoration means. Through the second communication means while synchronizing the uncompressed voice information of the first channel with the first channel uncompressed voice information output to the first voice output means by the first output control means. Transmission control means for transmitting to the first communication means, wherein the server device is transmitted by the transmission control means via the second communication means and received by the first communication means. And second output control means for causing the second sound output means to output uncompressed sound information of the second channel.

According to the first aspect of the present invention, a server device having a first communication means for transmitting AV information including compressed multi-channel audio information and video information is connected to the server device via a wireless network. And a client terminal apparatus having a second communication means for receiving the AV information transmitted by the first communication means, and the second communication means by the restoration means provided in the client terminal apparatus. The received AV information can be restored, and the first output control means provided in the client terminal apparatus can select one or more first channels of the multi-channel audio information of the AV information restored by the restoration means. Uncompressed audio information can be output to the first audio output means, and provided in the client terminal device Of the multi-channel audio information of the AV information restored by the restoration means by the transmission control means, uncompressed voice information of one or more second channels different from the first channel is obtained by the first output control means. The first communication means can be transmitted to the first communication means via the second communication means while synchronizing with the uncompressed voice information of the first channel output to the first audio output means. The output control means causes the second audio output means to output the uncompressed audio information of the second channel transmitted by the transmission control means via the second communication means and received by the first communication means. be able to.
Therefore, it is possible to transmit the uncompressed audio information of the second channel from the client terminal device to the server device using the existing wireless transmission path for transmitting AV information from the server device to the client terminal device. In addition, since the second audio output means for outputting the uncompressed audio information of the second channel is connected, there is no problem that the connection cord becomes an obstacle. That is, a multi-channel audio information compatible client / server system with a simple wireless transmission path and appearance can be provided.
In addition, since it is uncompressed audio information that is transmitted from the client terminal device to the server device, it is not necessary to newly provide means for compressing information in the existing client terminal device, which is convenient. .
Furthermore, since it is audio information that is transmitted from the client terminal device to the server device, even if it is uncompressed, the transmission delay that occurs during transmission is small enough to be ignored from the viewpoint of human viewing characteristics. Thus, it is possible to provide a multi-channel audio information compatible client / server system with good listening comfort.

According to the second aspect of the present invention, the server apparatus having the first communication means for transmitting the compressed multi-channel audio information is connected to the server apparatus via the wireless network, and transmitted by the first communication means. Multi-channel audio received by the second communication means by the restoring means provided in the client terminal device in a client / server system comprising: a client terminal device having second communication means for receiving the received multi-channel audio information The first output control means included in the client terminal device can restore the information, and the uncompressed audio information of one or more first channels among the multi-channel audio information restored by the restoration means 1 audio output means, and the transmission provided in the client terminal device The first output control means outputs the uncompressed audio information of one or more second channels among the multi-channel audio information restored by the restoration means to the first audio output means by the control means. It is possible to transmit to the first communication means via the second communication means while synchronizing with the uncompressed audio information of one channel, and the second output control means provided in the server device performs the transmission by the transmission control means. The non-compressed audio information of the second channel transmitted through the second communication means and received by the first communication means can be output to the second audio output means.
Therefore, it is possible to transmit uncompressed audio information of the second channel from the client terminal device to the server device using an existing wireless transmission path for transmitting multichannel audio information from the server device to the client terminal device, Since the second audio output means for outputting the uncompressed audio information of the second channel is connected to the server device, there is no problem that the connection cord becomes an obstacle. That is, a multi-channel audio information compatible client / server system with a simple wireless transmission path and appearance can be provided.
In addition, since it is uncompressed audio information that is transmitted from the client terminal device to the server device, it is not necessary to newly provide means for compressing information in the existing client terminal device, which is convenient. .
Furthermore, since it is audio information that is transmitted from the client terminal device to the server device, even if it is uncompressed, the transmission delay that occurs during transmission is small enough to be ignored from the viewpoint of human viewing characteristics. Thus, it is possible to provide a multi-channel audio information compatible client / server system with good listening comfort.

  Hereinafter, the best mode of a client / server system according to the present invention will be described in detail with reference to the drawings. The scope of the invention is not limited to the illustrated example.

<Configuration of client / server system>
First, the configuration of the client / server system S will be described with reference to FIGS.
The client / server system S is installed in a room R as shown in FIG.
Specifically, for example, the server device 1 of the client / server system S and the external device 2 connected to the server device 1 are installed in the center of the rear surface of the viewer A in the room R. The rear left speaker 31 connected to 1 is installed on the rear left side of the viewer A, and the rear right speaker 32 connected to the server apparatus 1 is installed on the rear right side of the viewer A. For example, the client terminal device 5 of the client / server system S, the center speaker 61 and the video display unit 7 connected to the client terminal device 5 are installed at the front center of the viewer A, and the client terminal device The front left speaker 62 connected to 5 is installed on the front left side of the viewer A, and the front right speaker 63 connected to the client terminal device 5 is installed on the front right side of the viewer A.

  For example, as shown in FIG. 2, the server device 1 and the client terminal device 5 included in the client / server system S are connected via a wireless network N.

  The wireless network N is, for example, a network such as a wireless local area network (LAN) conforming to the IEEE (Institute of Electrical and Electronic Engineers) 802.11 standard.

[Configuration of server device]
For example, as illustrated in FIG. 2, the server device 1 includes an encoder 11, a baseband unit 12, a control unit 14, and the like. Each unit is connected by a bus B1.
The server device 1 also includes an RF (Radio Frequency) unit 13 connected to the baseband unit 12.
In addition, the server device 1 is connected to the external device 2 and the second audio output unit 3.

Specifically, the external device 2 is connected to the encoder 11 of the server device 1, for example.
The external device 2 is, for example, a television set, a video recorder, a PVR (Personal Video Recorder), a BS (Broadcasting Satellite) broadcast or a CS (Communication Satellite) broadcast tuner, an STB (Set Top Box), a DVD (Digital Versatile Disk). Any suitable device capable of outputting AV information (uncompressed AV information) including audio information (uncompressed audio information) and video information (uncompressed audio information) to the server device 1 such as a player or an audio device. Is optional.
Here, the audio information output from the external device 2 is, for example, a multi-channel including audio information of 5 channels (“center”, “front left”, “front right”, “rear left”, and “rear right”). Audio information (hereinafter referred to as “MC audio information”).
In the present embodiment, the first channel refers to, for example, three channels of “center”, “front left”, and “front right”, and the second channel includes, for example, “rear left” and “rear right”. "2 channels".

Specifically, the second audio output unit 3 is connected to, for example, the baseband unit 12 of the server device 1. For example, as illustrated in FIG. 2, a rear left speaker 31, a rear right speaker 32, and the like. , Etc.
Specifically, in the second audio output unit 3, for example, as a second audio output unit, a CPU 141 (described later) that executes the second output control program 1431 outputs uncompressed audio information of the second channel. Used when doing.
For example, the rear left speaker 31 outputs sound based on “rear left” uncompressed sound information output from the baseband unit 12.
For example, the rear right speaker 32 outputs sound based on “rear right” uncompressed sound information output from the baseband unit 12.

The encoder 11 synchronizes the uncompressed AV information output from the external device 2 in accordance with an instruction from the control unit 14, for example, while synchronizing with a predetermined file format (for example, MPEG-2 (Moving Picture Experts Group phase 2) format). Etc.) and output to the baseband unit 12.
Specifically, the compressed AV information includes compressed MC audio information, compressed video information, synchronization information, and the like.

The baseband unit 12 is a circuit that performs encoding or decoding on predetermined information according to the standard of the wireless network N, for example, in accordance with an instruction from the control unit 14.
Specifically, the baseband unit 12 generates, for example, a baseband signal of compressed AV information by encoding the compressed AV information output from the encoder 11 and outputs the baseband signal to the RF unit 13.
In addition, the baseband unit 12 decodes, for example, a baseband signal of uncompressed audio information of the second channel output from the RF unit 13 and outputs the decoded baseband signal to the second audio output unit 3.

The RF unit 13 includes, for example, an antenna 131, a power amplifier (not shown), a mixer (not shown), a filter (not shown), a modulator (not shown), a demodulator (not shown), and the like. have.
Specifically, for example, the RF unit 13 modulates a baseband signal of compressed AV information output from the baseband unit 12 by a modulator (not shown), and a mixer (not shown) or a filter (not shown). Is converted to a transmission wave of compressed AV information via a power amplifier and amplified by a power amplifier (not shown). Then, the transmission wave of the amplified compressed AV information is transmitted by the antenna 131 to the antenna 511 (described later) of the client terminal device 5.
Further, the RF unit 13 amplifies a transmission wave of uncompressed audio information of the second channel transmitted from the antenna 511 (described later) of the client terminal device 5 and received by the antenna 131 by a power amplifier (not illustrated), for example. Then, a modulated wave is extracted through a filter (not shown) or a mixer (not shown), and demodulated by a demodulator (not shown), thereby generating a baseband signal of uncompressed audio information of the second channel. get. Then, the baseband signal of the acquired uncompressed audio information of the second channel is output to the baseband unit 12.

  Here, the first communication means includes a baseband unit 12, an RF unit 13, and an antenna 131.

  For example, as shown in FIG. 2, the control unit 14 includes a CPU (Central Processing Unit) 141, a RAM (Random Access Memory) 142, a storage unit 143, and the like.

  The CPU 141 performs various control operations according to various processing programs for the server device 1 stored in the storage unit 143.

  The RAM 142 includes a program storage area for expanding a processing program executed by the CPU 141, a data storage area for storing input data, a processing result generated when the processing program is executed, and the like.

The storage unit 143 is a system program that can be executed by the server device 1, various processing programs that can be executed by the system program, data that is used when these various processing programs are executed, and data that is a result of processing processed by the CPU 141. Memorize etc. Note that the program is stored in the storage unit 143 in the form of a computer readable program code.
Specifically, the storage unit 143 stores, for example, a second output control program 1431 as shown in FIG.

The second output control program 1431 is executed by a CPU 541 (described later) that executes the transmission control program 5432 of the client terminal device 5, a baseband unit 52 (described later), an RF unit 51 (described later), and an antenna 511 (described later). ), The CPU 141 realizes a function of causing the second audio output unit 3 to output the uncompressed audio information of the second channel received via the antenna 131, the RF unit 13, and the baseband unit 12. .
Specifically, the CPU 141 issues an instruction to the baseband unit 12 and causes the second audio output unit 3 to output the uncompressed audio information of the second channel.
The CPU 191 functions as a second output control unit by executing the second output control program 1431.

[Configuration of client terminal]
For example, as shown in FIG. 2, the client terminal device 5 includes a baseband unit 52, a decoder 53, a control unit 54, and the like. Each unit is connected by a bus B5.
In addition, the client terminal device 5 includes an RF unit 51 connected to the baseband unit 52.
In addition, the client terminal device 5 is connected to the first audio output unit 6 and the video display unit 7.

Specifically, the first audio output unit 6 is connected to, for example, the decoder 53 of the client terminal device 5. For example, as shown in FIG. 2, the center speaker 61, the front left speaker 62, and the front And a right speaker 63.
Specifically, in the first audio output unit 6, for example, as a first audio output unit, a CPU 541 (described later) that has executed the first output control program 5431 outputs uncompressed audio information of the first channel. Used when doing.
For example, the center speaker 61 outputs audio based on the uncompressed audio information of “center” output from the decoder 53.
For example, the front left speaker 62 outputs sound based on the “front left” uncompressed sound information output from the decoder 53.
For example, the front right speaker 63 outputs audio based on the “front right” uncompressed audio information output from the decoder 53.

Specifically, the video display unit 7 is connected to, for example, the decoder 53 of the client terminal device 5 and includes an LCD (Liquid Crystal Display) panel or the like.
Specifically, the video display unit 7 is used when, for example, a CPU 541 (described later) that has executed the first output control program 5431 outputs uncompressed video information.

The RF unit 51 includes, for example, an antenna 511, a power amplifier (not shown), a mixer (not shown), a filter (not shown), a modulator (not shown), a demodulator (not shown), and the like. have.
Specifically, the RF unit 51, for example, amplifies a transmission wave of compressed AV information transmitted from the antenna 131 of the server device 1 and received by the antenna 511 by a power amplifier (not illustrated), and filters (not illustrated). ) Or a mixer (not shown), and a demodulator (not shown) demodulates the signal to obtain a baseband signal of compressed AV information. Then, the baseband signal of the acquired compressed AV information is output to the baseband unit 52.
Further, the RF unit 51 modulates, for example, a baseband signal of uncompressed audio information of the second channel output from the baseband unit 52 by a modulator (not shown), and a mixer (not shown) or filter (not shown). (Not shown) is converted into a transmission wave of uncompressed audio information of the second channel and amplified by a power amplifier (not shown). Then, the transmission wave of the uncompressed audio information of the amplified second channel is transmitted to the antenna 131 of the server apparatus 1 through the antenna 511.

The baseband unit 52 is a circuit that performs encoding or decoding on predetermined information according to the standard of the wireless network N, for example, in accordance with an instruction from the control unit 54.
Specifically, for example, the baseband unit 52 decodes the baseband signal of the compressed AV information output from the RF unit 51 and outputs the decoded baseband signal to the decoder 53.
Further, the baseband unit 52 generates a baseband signal of the uncompressed audio information of the second channel by encoding the uncompressed audio information of the second channel output from the decoder 53, for example, To the unit 51.

  Here, the second communication means includes an antenna 511, an RF unit 51, and a baseband unit 52.

The decoder 53 synchronizes the compressed AV information received by the antenna 511, the RF unit 51, and the baseband unit 52 and output from the baseband unit 52 as a restoration unit, for example, in accordance with an instruction from the control unit 54. Restore to uncompressed AV information. Then, the uncompressed MC audio information, the uncompressed video information, the synchronization information, and the like are separated and extracted from the uncompressed AV information.
Specifically, the decoder 53 outputs the synchronization information to the control unit 54.
In addition, the decoder 53 converts the uncompressed audio information of the first channel in the uncompressed MC audio information into the first audio output unit in accordance with an instruction from a CPU 541 (described later) that has executed the first output control program 5431. 6 is output.
In addition, the decoder 53 outputs uncompressed audio information of the second channel in the uncompressed MC audio information to the baseband unit 52 in accordance with an instruction from a CPU 541 (described later) that has executed the transmission control program 5432.
Further, the decoder 53 outputs uncompressed video information to the video display unit 7 in accordance with an instruction from a CPU 541 (described later) that has executed the first output control program 5431.

  For example, as shown in FIG. 2, the control unit 54 includes a CPU 541, a RAM 542, a storage unit 543, and the like.

  The CPU 541 performs various control operations according to various processing programs for the client terminal device 5 stored in the storage unit 543.

  The RAM 542 includes a program storage area for expanding a processing program executed by the CPU 541, a data storage area for storing input data, a processing result generated when the processing program is executed, and the like.

The storage unit 543 stores a system program that can be executed by the client terminal device 5, various processing programs that can be executed by the system program, data that is used when these various processing programs are executed, and processing results that are arithmetically processed by the CPU 541. Store data etc. The program is stored in the storage unit 543 in the form of a computer readable program code.
Specifically, the storage unit 543 stores, for example, a first output control program 5431, a transmission control program 5432, and the like as illustrated in FIG.

The first output control program 5431 separates and extracts the uncompressed MC audio information of the first channel from the decompressed uncompressed AV information out of the uncompressed MC audio information of the uncompressed AV information restored by the decoder 53. The CPU 541 realizes the function of causing the first audio output unit 6 to output in accordance with the synchronized information.
Further, the first output control program 5431 synchronizes the uncompressed video information of the uncompressed AV information restored by the decoder 53 with the uncompressed audio information of the first channel that is output to the first audio output unit 6. However, the CPU 541 realizes the function of causing the video display unit 7 to output.
Specifically, the CPU 541 instructs the decoder 53 to output the uncompressed audio information of the first channel to the first audio output unit 6 and output the uncompressed video information to the video display unit 7.
The CPU 541 functions as a first output control unit by executing the first output control program 5431.

The transmission control program 5432 uses the uncompressed MC audio information of the uncompressed AV information restored by the decoder 53 as the first uncompressed audio information of the second channel by the CPU 541 executing the first output control program 5431. The function of transmitting to the antenna 131 of the server device 1 via the baseband unit 52, the RF unit 51, and the antenna 511 while synchronizing with the uncompressed audio information of the first channel output to the audio output unit 6 The CPU 541 is realized.
Specifically, the CPU 541 instructs the baseband unit 52 to transmit uncompressed audio information of the second channel to the antenna 131.
The CPU 541 functions as a transmission control unit by executing the transmission control program 5432.

<AV information output processing>
Next, processing relating to output of AV information by the client / server system S will be described with reference to the flowchart of FIG.
In FIG. 3, processing related to the output of one AV information among the AV information sequentially input from the external device 2 will be described.

  First, when non-compressed AV information is input from the external device 2 to the encoder 11 of the server device 1 (step S11), the CPU 141 of the server device 1 issues an instruction to the encoder 11 to input the input uncompressed AV information. Are compressed into compressed AV information (step S12).

  Next, the CPU 141 instructs the baseband unit 12 to transmit the compressed AV information compressed in step S12 to the antenna 511 of the client terminal device 5 via the RF unit 13 and the antenna 131 (step S13). .

  When the antenna 511, the RF unit 51, and the baseband unit 52 of the client terminal device 5 receive the compressed AV information transmitted in step S13 (step S14), the CPU 541 of the client terminal device 5 issues an instruction to the decoder 53. Then, the received compressed AV information is restored to uncompressed AV information (step S15), and uncompressed MC audio information, uncompressed video information, and synchronization information are separated and extracted from the uncompressed AV information (step S16).

  Next, the CPU 541 executes the first output control program 5431, issues an instruction to the decoder 53, and outputs the first channel (“center”, “center” of the uncompressed MC audio information separated and extracted in step S16. The uncompressed audio information of “front left” and “front right”) is output to the first audio output unit 6 according to the synchronization information separated and extracted in step S16 (step S17).

  Simultaneously with the processing in step S17, the CPU 541 executes the first output control program 5431, issues an instruction to the decoder 53, and outputs the uncompressed video information separated and extracted in step S16 in step S17. While synchronizing with the uncompressed audio information of one channel, it is output to the video display unit 7 (step S18).

  Simultaneously with the processing in step S17, the CPU 541 executes the transmission control program 5432, issues an instruction to the baseband unit 52, and outputs the second channel (“” in the uncompressed MC audio information separated and extracted in step S16. The uncompressed audio information of “Rear Left” and “Rear Right”) is synchronized with the uncompressed audio information of the first channel output in Step S17, and the server device 1 via the RF unit 51 and the antenna 511. It transmits to the antenna 131 (step S19).

  When the antenna 131, the RF unit 13 and the baseband unit 12 of the server device 1 receive the uncompressed audio information of the second channel transmitted in step S19 (step S20), the CPU 141 of the server device 1 The output control program 1431 is executed, an instruction is given to the baseband unit 12, and the received uncompressed audio information of the second channel is output to the second audio output unit 3 (step S21). Exit.

According to the client / server system S of the present invention described above, the server apparatus having the baseband unit 12, the RF unit 13, and the antenna 131 for transmitting the compressed AV information including the compressed MC audio information and the compressed video information. 1 and the server apparatus 1 through a wireless network N, and includes an antenna 511, an RF unit 51, and a baseband unit 52 that receive compressed AV information transmitted by the baseband unit 12, the RF unit 13, and the antenna 131. A client terminal device 5, and a decoder 53 included in the client terminal device 5 can restore the compressed AV information received by the antenna 511, the RF unit 51, and the baseband unit 52 to uncompressed AV information, and The first output control program 5431 provided in the terminal device 5 was executed Of the uncompressed MC audio information of the uncompressed AV information restored by the decoder 53 by the PU 541, the first channel ("center", "front right" and "front left") uncompressed audio information Of the uncompressed MC audio information of the uncompressed AV information restored by the decoder 53 by the CPU 541 that has executed the transmission control program 5432 included in the client terminal device 5. The first non-compressed audio information of the second channel (“Rear Left” and “Rear Right”) different from the channel is output to the first audio output unit 6 by the CPU 541 that has executed the first output control program 5431. The baseband unit 52, the RF unit 51, and the antenna 511 are used to synchronize with the uncompressed audio information of the other channels. Can be transmitted to the antenna 131 of the apparatus 1, and is transmitted by the CPU 541 that executes the transmission control program 5432 of the client terminal apparatus 5 by the CPU 141 that executes the second output control program 1431 included in the server apparatus 1. The uncompressed audio information of the second channel received by the RF unit 13 and the baseband unit 12 can be output to the second audio output unit 3.
Therefore, the uncompressed audio information of the second channel can be transmitted from the client terminal device 5 to the server device 1 using the existing wireless transmission path for transmitting the compressed AV information from the server device 1 to the client terminal device 5. Furthermore, since the second audio output unit 3 for outputting the non-compressed information of the second channel is connected to the server device 1, there is no problem that the connection cord becomes an obstacle. That is, the client / server system S compatible with MC audio information with a simple wireless transmission path and appearance can be provided.
Further, since uncompressed audio information is transmitted from the client terminal device 5 to the server device 1, it is not necessary to newly provide an encoder for compressing information in the existing client terminal device. Is good.
Furthermore, since it is audio information that is transmitted from the client terminal device 5 to the server device 1, even if it is not compressed, the transmission delay that occurs during transmission is so small that it can be ignored from the viewpoint of human viewing characteristics. Due to the delay, it is possible to obtain the MC voice information compatible client / server system S with good listening comfort.

The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist thereof.
Of the five channels "Center", "Front Left", "Front Right", "Rear Left" and "Rear Right", the three channels "Center", "Front Left" and "Front Right" are the first channels. The two channels “Rear Left” and “Rear Right” are the second channels, but the first channel is optional as long as it is one or more of the five channels, and the second channel Also, it is arbitrary as long as it is one or more of the five channels. That is, the first channel and the second channel may be the same, a part of them may overlap, or they may be completely different.
The channels constituting the MC audio information are not limited to five channels, but are arbitrary.
The speaker included in the first audio output unit 6 connected to the client terminal device 5 can be appropriately changed according to the first channel, and the second audio output unit 3 connected to the server device 1 includes The speaker can be appropriately changed according to the second channel.

  The information output from the external device 2 connected to the server device 1 only needs to include at least MC audio information (uncompressed MC audio information), and the external device 2 outputs only the MC audio information. For example, a CD (Compact Disc) player may be used.

1 is a diagram showing an overall configuration of a client / server system according to the present invention. It is a block diagram which shows the functional structure of the client server system concerning this invention. It is a flowchart for demonstrating the process regarding the output of AV information by a client server system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Server apparatus 3 2nd audio | voice output part (2nd audio | voice output means)
12 Baseband section (first communication means)
13 RF unit (first communication means)
131 Antenna (first communication means)
141 CPU (second output control means)
1431 Second output control program (second output control means)
5 Client terminal device 6 1st audio | voice output part (1st audio | voice output means)
51 RF unit (second communication means)
52 Baseband part (second communication means)
53 Decoder (restoration means)
511 antenna (second communication means)
541 CPU (first output control means, transmission control means)
5431 First output control program (first output control means)
5432 Transmission control program (transmission control means)
N Wireless network S Client / server system

Claims (2)

A server device having first communication means for transmitting AV information including compressed multi-channel audio information and video information, and connected to the server device via a wireless network and transmitted by the first communication means. In a client / server system comprising: a client terminal device having second communication means for receiving received AV information;
The client terminal device
Restoring means for restoring AV information received by the second communication means;
A first output control unit that causes the first audio output unit to output uncompressed audio information of one or more first channels among the multi-channel audio information of the AV information restored by the restoration unit;
Of the multi-channel audio information of the AV information restored by the restoration means, uncompressed audio information of one or more second channels different from the first channel is converted into the first output control means by the first output control means. Transmission control means for transmitting to the first communication means via the second communication means while synchronizing with the uncompressed audio information of the first channel output to the audio output means of
With
The server device
A second audio output means that outputs the uncompressed audio information of the second channel transmitted by the transmission control means via the second communication means and received by the first communication means to the second audio output means; Output control means;
A client-server system comprising: A server device having first communication means for transmitting compressed multi-channel audio information, and the server device connected to the server device via a wireless network and receiving multi-channel audio information transmitted by the first communication means. In a client / server system comprising a client terminal device having a second communication means,
The client terminal device
Restoring means for restoring the multi-channel audio information received by the second communication means;
First output control means for causing the first sound output means to output uncompressed sound information of one or more first channels among the multi-channel sound information restored by the restoration means;
Of the multi-channel audio information restored by the restoration means, uncompressed audio information of one or more second channels is output to the first audio output means by the first output control means. Transmission control means for transmitting to the first communication means via the second communication means while synchronizing with the uncompressed audio information of the channel of
With
The server device
A second audio output means that outputs the uncompressed audio information of the second channel transmitted by the transmission control means via the second communication means and received by the first communication means to the second audio output means; Output control means;
A client-server system comprising:

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