JP2002262128A - Signal processing system and its method and video camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a signal processing system that can be simply and accurately synchronously with other devices without the need for connection to the other devices and properly edit image data. SOLUTION: Each camcorder generates a synchronizing signal for a vertical synchronizing signal and sampling an audio signal on the basis of a received GPS signal and the frame configuration of and sampling of a photographed video signal, an extracted audio signal, a video signal reproduced from a tape, and a reproduced audio signal are executed entirely on the basis of the synchronizing signal. A channel selector 200 merely selects a source to switch the video signal and the audio signal properly so as to permit ease of edit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal processing system and a signal processing method capable of simply and accurately synchronizing each device and thereby appropriately performing editing processing of image data and audio data. And a video camera used in such a signal processing system.

[0002]

2. Description of the Related Art When a program is generated in a television broadcast or the like, one video data is created by performing an editing process of switching video data output from a plurality of cameras in real time using a channel selector. There are many cases. In such a case, it is necessary to synchronize the video data output from the plurality of cameras. Specifically, it is necessary to match the timing of the vertical synchronization signal of the video signal output from each camera.
In a case where a plurality of devices are to be operated in synchronization with each other, a method of connecting each device with a signal line and performing communication of a synchronization signal to control the operation of each device is usually used. Is taken.

When it is difficult to obtain such a synchronized signal, measures have been taken such as providing a frame memory to allow a deviation in the timing of the vertical synchronization signal. For example, FIG.
5 (B), the video data after switching as shown in FIG. 5 (C) is sequentially stored in a buffer memory capable of storing one frame of data. Remember. Then, when switching is instructed by the channel selector, the video data stored in the buffer memory is read out according to the timing of the video data before switching, and the output video data is switched. As a result, as shown in FIG. 5D, output image data in which frames are appropriately switched is obtained.

[0004] This also applies to digital audio data. For example, when one piece of audio data is generated from audio data obtained by a plurality of microphones and subjected to AD conversion, it is important to match the sampling timing in each AD converter.

[0005]

However, it is very troublesome to connect each device with a signal line as described above. For example, when broadcasting a baseball game, a large baseball stadium is photographed using a plurality of cameras. In such a case, the cables connecting the cameras and the main broadcast device have an enormous length. Therefore, it is preferable that the number of cables connecting such devices be as small as possible. In addition, in the method of adjusting the timing using the frame buffer as described above, the generated video data is not exactly a real-time video, and also becomes a video that is temporally distorted at the boundary of the switching, and There is a problem of poor quality.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to make it possible to synchronize each device more easily and accurately without connecting the devices by wire, thereby enabling appropriate editing processing of image data and audio data. It is to provide a signal processing system and a signal processing method. Further, another object of the present invention is to make it possible to synchronize with another device more easily and accurately without connecting to another device by wire, and thereby to appropriately perform image data editing processing. It is an object of the present invention to provide a video camera that generates various image data.

[0007]

In order to solve the above-mentioned problems, a signal processing system according to the present invention comprises a plurality of AV signals each generating a desired AV signal having one or both of an audio signal and a video signal. A signal generating device, receiving means for receiving a predetermined radio wave defining a standard time, synchronizing signal generating means for generating a predetermined synchronizing signal based on the received standard radio wave, and a synchronizing signal based on the generated synchronizing signal. A for generating the desired AV signal defined in
A plurality of signal generation devices each having V signal generation means, and a signal processing device for editing a plurality of AV signals generated by the plurality of signal generation devices and generating a desired AV signal.

Preferably, each of the signal generating devices further includes an image pickup unit for photographing a desired image, and the AV signal generating unit synchronizes with the generated synchronization signal based on the photographed image. A video signal of a predetermined format is generated.
Preferably, each of the signal generation devices further includes an audio signal input unit to which a desired audio signal is input, and the AV signal generation unit converts the input audio signal to the generated synchronization signal. Sampling is performed at a predetermined sampling timing based on the signal to generate a predetermined digital audio signal.

Specifically, the receiving means receives a long-wave standard radio wave. More specifically, the signal processing device includes:
A plurality of AVs generated by the plurality of signal generation devices
The signals are sequentially switched to generate a desired AV signal.

In a signal processing method according to the present invention, a plurality of signal generators each receive a predetermined radio wave defining a standard time.
Each generates a predetermined synchronization signal based on the received standard radio wave, and in the plurality of signal generation devices, each defined based on the generated synchronization signal, one of an audio signal and a video signal or A desired AV signal having both of them is generated, and the plurality of AV signals generated by the plurality of signal generation devices are edited to obtain a desired AV signal.
Generate a signal.

Further, the video camera according to the present invention comprises: a receiving means for receiving a predetermined radio wave defining a standard time; a synchronizing signal generating means for generating a predetermined synchronizing signal based on the received standard radio wave; And video signal generating means for generating a video signal of a predetermined format synchronized with the generated synchronization signal based on the captured video.

Preferably, audio signal input means for inputting a desired audio signal, and the input audio signal are sampled at a predetermined sampling timing based on the generated synchronization signal, and a predetermined digital audio signal Audio signal generating means for generating the audio signal. Specifically, the receiving means receives a long-wave standard radio wave.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described.
This will be described with reference to FIGS. In the present embodiment, a desired AV program constituting one AV program is switched by appropriately switching AV signals output from two camcorders.
The present invention will be described by exemplifying a video editing system for generating a signal.

FIG. 1 is a diagram schematically showing a configuration of a video editing system 10 according to the present embodiment. As shown in FIG. 1, the video editing system 10 of the present embodiment has two camcorders 100-1 and 100-2 and a channel selector 200.

First, the configuration of the camcorders 100-1 and 100-2 will be described. Camcorder 100-1, 100-2
, Respectively, captures a desired image and captures desired audio data, records AV data on a digital video cassette tape, and communicates with the outside via a digital interface of the AV data. 2
The two camcorders 100-1 and 100-2 are camcorders having exactly the same configuration.
These will be described as 00.

Specifically, the camcorder 100 captures and captures desired images and audio data, records them on a cassette tape to be stored, or directly outputs them to the channel selector 200 via a digital interface. Also, it reproduces the AV data recorded on the cassette tape to be stored and displays it on a monitor provided,
The data is directly output to the channel selector 200 via a digital interface. Further, the AV data input via the digital interface is recorded on a cassette tape to be accommodated or displayed on a monitor provided.

In particular, in each of these processes, photographing or capturing of a desired image and audio data,
And the AV recorded on the cassette tape to be accommodated.
When reproducing data, the GPS (Global Position
ing System) A radio signal transmitted from a satellite is received, and based on this, a video signal whose frame is formed at a predetermined timing, that is, a video signal in which a vertical synchronization signal comes at a predetermined timing, or at a predetermined timing Generate a sampled audio signal.

A more detailed configuration of the camcorder 100 will be described with reference to FIG. FIG. 2 is a block diagram showing a configuration of the camcorder 100 according to the present invention. The camcorder 100 includes a photographing unit (PCT) 101, a microphone (MIC) 102, a GPS decoder 10
3. Synchronous signal generation unit (PLL) 104, video signal analog / digital conversion unit (A / D) 105, blocking / shuffling unit 106, DCT unit 107, encoding unit 108, framing unit 109, audio signal analog / digital Conversion unit (A / D) 110, interleave unit 111, multiplexing unit (MUX) 112, first switch 113, deshuffling unit 116, parity generation unit (PTG) 117, channel encoding unit 11
8, tape recorder 119, channel decoding section 120, time correction section (TBC) 121, error correction section (ECC) 122, shuffling section 123, second switch 124, separation section (DMUX) 125, frame decomposition section (DEFRAMING) ) 126, decoding section 127, inverse DCT section (IDCT) 128, deblocking / deshuffling section 129, video signal digital / analog conversion section (D / A) 130, deinterleave section 131, audio signal digital / analog conversion section (A / D) 132,
Third switch 133, packetizing section 134, parity adding section (PTG) 135, transmitting section (DRIVER) 136, receiving section 137, error detecting section 138, packet decomposing section (DE
PACKET) 139, a monitor (MON) 140, and a speaker (SP) 141.

The image capturing section 101 captures a desired video, generates an analog video signal corresponding to the captured image, and outputs the analog video signal to the video signal analog / digital conversion section 105. The microphone 102 captures a desired sound,
A corresponding analog audio signal is generated and output to audio signal analog / digital converter 110.

The GPS decoder 103 analyzes a GPS signal received by the antenna, detects a predetermined timing, and outputs a signal indicating the timing to the synchronization signal generator 104.
Output to The GPS receives radio waves transmitted from four or more GPS satellites out of 24 GPS satellites orbiting about 20,000 km from the ground and calculates the time required for each GPS satellite to reach the receiver. A system that knows the distance from and determines the position on the ground, and was developed by the United States of America. Originally, it was a system for navigation support of aircraft, ships, etc.,
At present, it is widely used for in-vehicle navigation systems.

A synchronizing signal generating section 104 generates a vertical synchronizing signal of an NTSC television signal and a synchronizing signal for sampling an audio signal in synchronization with the vertical synchronizing signal based on a signal indicating the timing inputted from the GPS decoder 103. PLL (Phase
Lock Loop) circuit. The generated vertical synchronizing signal is supplied to a video signal analog / digital converter 105.
The synchronization signal for sampling the audio signal is sent to the audio signal analog / digital converter 110 and the tape recorder 119.
Each is output.

Video signal analog / digital converter 1
05 samples and quantizes the analog video signal input from the photographing unit 101 at a predetermined timing based on the vertical synchronization signal input from the synchronization signal generation unit 104, and generates a digital component video signal in a valid operation period. , Blocking / shuffling unit 10
6 is output.

Blocking / shuffling unit 106
Performs blocking on the video signal input from the video signal analog / digital conversion unit 105 first. That is, 8 samples in the horizontal direction and 8 lines in the vertical direction are made into one DCT block, and
A total of six blocks of four T blocks and one DCT block of color difference signals are divided as unit pixel blocks.
Also, the blocking / shuffling unit 106
A shuffling process for averaging the data amount after T is performed. The shuffled video signal is DCT
Output to the unit 107.

The DCT unit 107 performs a discrete cosine transform on the blocked video signal input from the blocking / shuffling unit 106,
8 is output.

The coding unit 108 performs quantization on the DCT input from the DCT unit 107 and expressed by DCT coefficients in a predetermined quantization step, and further performs variable length coding by two-dimensional Huffman coding. Perform encoding. At this time, the rate that can be recorded on the tape is fixed,
The quantization step is controlled so that the data amount is constant for every 30 DCT blocks. The variable-length coded video signal is output to frame configuration section 109.

The frame forming section 109 includes an encoding section 108
ECC at the time of recording and playback
(Error Correction Code) is formed into a frame of one line of the product code configuration, and is output to the multiplexing unit 112.

The audio signal analog / digital conversion section 110 samples the audio signal input from the microphone 102 at a predetermined timing based on the synchronization signal input from the synchronization signal generation circuit 31, and further quantizes the audio signal into a digital signal. The signal is converted and output to interleaving section 111.

The interleaving section 111 converts the digital audio signal input from the audio signal analog / digital converting section 110 into a signal for each predetermined unit for performing the distributed processing, and outputs the signal to the multiplexing section 112.

The multiplexing section 112 includes a frame forming section 109
And a video signal and an audio signal input from the interleave unit 111 are time-division multiplexed, and the multiplexed video signal and audio signal (hereinafter, referred to as a video / audio signal) are switched to the first switch 113 and the third switch. To the switch 133.

The first switch 113 is a switch for selecting either a newly captured or captured signal or a signal transmitted via a digital interface as a video / audio signal to be recorded in the tape recorder 119. is there. First switch 113
The video / audio signal selected in is output to the AV data deshuffling unit 116.

The deshuffling unit 116 converts the video / audio signal selected by the first switch 113 into data for arranging video data that is spatially close to the screen and close to the tape. The permutation is performed, and the result is output to the parity generation unit 117.

The parity generation section 117 adds ECC to the video / audio signal input from the deshuffling section 116, and
18 is output.

The channel encoding unit 118 performs recording modulation on the video / audio signal added with the ECC input from the parity generation unit 117 for recording on a tape, and outputs it to the tape recorder 119.

The tape recorder 119 receives the modulated video / video input from the channel encoding unit 118.
The audio signal is recorded on the set tape-shaped recording medium. Further, the tape recorder 119 is set
a The video / audio data signal recorded on the tape-shaped recording medium is reproduced, and the channel decoding unit 12
Output to 0. At this time, the tape recorder 119 generates a signal based on the vertical synchronization signal input from the synchronization signal generation unit 104 and the synchronization signal for audio signal sampling.
For example, a video signal and an audio signal synchronized with the respective synchronization signals are reproduced by controlling the tracking of the tape.

The channel decoding unit 120 performs a serial-parallel conversion of the video / audio signal obtained by reproducing the tape input from the tape recorder 119, demodulates the recording modulation, and outputs it to the time correction unit 121.

The time correction section 121 corrects the time axis of the reproduced video / audio signal input from the channel decoding section 120 and outputs the corrected video / audio signal to the error correction section 122.

The error correction unit 122 includes a time correction unit 121
ECC is applied to the playback video / audio signal
Error correction processing based on the
23.

The shuffling unit 123 converts the reproduced video / audio signal input from the error correction unit 122
The original arrangement before the arrangement is replaced in the deshuffling unit 116 is returned to the second switch 124.

The second switch 124 is connected to the camcorder 10
A switch for selecting either a signal reproduced by the tape recorder 119 or a signal transmitted via a digital interface as a video / audio signal output from the monitor 140 and the speaker 141. The video / audio signal selected by the second switch 124 is output to the separation unit 125.

The separation unit 125 separates the multiplexed reproduced video / audio signal input from the second switch 124 into a video signal and an audio signal. Output to the deinterleave unit 131.

The frame decomposing unit 126 decomposes the video signal input from the demultiplexing unit 125 into word units, and outputs it to the decoding unit 127. Decoding section 127 performs decoding and inverse quantization of the variable-length code on the video signal input from frame decomposition section 126, restores the original DCT coefficient, and outputs the result to inverse DCT section 128.

The inverse DCT unit 128 performs inverse DCT on the video signal input from the decoding unit 127 to generate a video signal represented by the original spatial pixel value, and deblocks / deshuffles it. 129.

The deblocking / deshuffling unit 12
Reference numeral 9 denotes a video signal input from the inverse DCT unit 128,
It rearranges in the order of the screen data, generates a digital component video signal, and outputs it to the video signal digital / analog converter 130.

Video signal digital / analog converter 1
30 converts the digital component video signal input from the deblocking / deshuffling unit 129 into an analog signal, and outputs the generated analog component video signal from the monitor 140.

The deinterleaving section 131 is provided with a separating section 125.
The input video signal and the separated audio signal are processed in the opposite manner to the interleaving section 111 to generate an original digital audio signal, and output to the audio signal digital / analog conversion section 132.

The audio signal digital / analog converter 132 converts the digital audio signal input from the deinterleaver 131 into an analog audio signal, and outputs the analog audio signal from the speaker 141.

The third switch 133 is provided as a video / audio signal output from the camcorder 100 via the digital interface, a newly captured video / audio signal or a signal reproduced by the tape recorder 119. This is a switch for selecting either one. The video / audio signal selected by the third switch 133 is output to the packetizing unit 134.

The packetizing section 134 includes the third switch 1
The video / audio signal selected by 33 is packetized and output to the parity adding unit 135. The parity adding unit 135 adds parity to the packetized video / audio signal input from the packetizing unit 134 and outputs it to the transmitting unit 136. The sending unit 136 converts the video / audio signal to which the parity is input from the parity adding unit 135 into serial data, and outputs the serial data from the camcorder 100 via the digital interface.

Receiving section 137 receives the serial input video / audio signal from the digital interface, converts it into parallel data, performs channel decoding, and outputs it to error detecting section 138. Error detection unit 13
8 performs error detection for each packet from the video / audio signal input from the receiving unit 137 and outputs the error to the packet decomposing unit 139.

The packet disassembly unit 139 includes the error detection unit 1
The packet of the video / audio signal input from 38 is decomposed and applied to the first switch 113 and the second switch 124, respectively. As a result, the output video / audio signal is finally recorded on a cassette tape by the tape recorder 119 when selected by the first switch 113, for example, and the second switch 124
Is selected, the output is finally output from the monitor 140 and the speaker 141.

The monitor 140 has a video signal digital /
An image is displayed on a screen based on an analog video signal output from the analog conversion unit 130. Speaker 14
1 is an audio signal digital / analog converter 13
2, based on the analog audio signal output from
Output audio.

Next, the configuration of the channel selector 200 will be described. The channel selector 200 edits the video / audio signals input from the two camcorders 100-1 and 100-2 via the digital interface as appropriate to generate a program for one video / audio signal, Similarly, the data is transmitted to a desired destination via the digital interface.

The configuration of the channel selector 200 will be described in detail with reference to FIG. The channel selector 200 includes a reception unit (RECEIVER) 201, an error detection unit 20
2. Packet disassembly unit (DEPACKET) 203, distributor 204, selector 205, packetization unit (PACKET) 2
06, the parity addition unit (PTS) 207 and the transmission unit (D
RIVER) 208.

The receiving unit 201 is connected to two camcorders 100-1 and 100-2 via a digital interface.
, Receives video / audio signals sequentially input in a packet format, converts the video / audio signals into parallel data, performs channel decoding, and outputs the result to the error detection unit 202. The error detection unit 202 receives the video /
Performs error detection for each packet from the audio signal,
Output to the packet decomposing unit 203. Packet disassembly unit 20
3 decomposes the packet of the video / audio signal input from the error detection unit 202, and
04.

The distributor 204 converts the video / audio signal input from the packet
The video signal is divided into two-channel video / audio signals sent from the two camcorders 100-1 and 100-2, and output to the selector 205. The selector 205 edits the video / audio signal by selecting one of the two video / audio signals from the two-channel video / audio signal input from the distributor 204, and packetizes the edited video / audio signal. Output to the conversion unit 206.

The packetizing section 206 packetizes the video / audio signal selected by the selector 205 and outputs it to the parity adding section 207. Parity adding section 207
Adds parity to the packetized video / audio signal input from the packetizing unit 206, and
08. The sending unit 208 is provided for the parity adding unit 20.
The video / audio signal to which the parity is added input from 7 is converted into serial data and output from the camcorder 100 via the digital interface.

Next, the operation of the video editing system 10 having such a configuration will be described. Here, according to the present invention, a case where desired video / audio data is obtained by outputting desired video / audio data from two camcorders 100-1 and 100-2, respectively, and switching the output by channel selector 200 The operation of the video editing system 10 will now be described.

First, the camcorder 1 having the above-described configuration will be described.
In each of 00-1 and 100-2, the GPS signal received by the antenna is analyzed by the GPS decoder 103, and a predetermined vertical synchronization signal and audio signal sampling based on the GPS signal are performed by the synchronization signal generation unit 104. Generating a synchronization signal. Therefore, these synchronization signals are common, that is, synchronized timing signals in the respective camcorders 100-1 and 100-2.

Then, for example, one of the camcorders 1
0, when new video / audio data is to be captured, the analog video signal captured by the capturing unit 101 is converted into a vertical synchronization signal input from the synchronization signal generation unit 104 by the video signal analog / digital conversion unit 105. It converts to a digital component video signal with a frame configuration based on it. A blocking / shuffling unit 106 performs blocking and shuffling, a DCT unit 107 performs a discrete cosine transform, a coding unit 108 performs quantization and two-dimensional Huffman coding, and a frame forming unit 109 configures an ECC product code. Is converted to a frame configuration of one line.

The analog audio signal captured by the microphone 102 is an audio signal analog / audio signal.
The digital signal is sampled at a predetermined timing based on the synchronizing signal input from the synchronizing signal generation circuit 31 by the digital converter 110, is further quantized, and is converted into a digital signal. Then, the digital audio signal is converted into a signal for each predetermined unit by the interleaving section 111. Then, the video signal and the audio signal generated in this manner are multiplexed by the multiplexing unit 112, packetized by the packetizing unit 134, and parity-added by the parity adding unit 135.
And a parity is added thereto, and transmitted from the transmission unit 136 to the channel selector 200.

When any of the camcorders 10 reproduces a video / audio signal recorded on a tape and provides it for editing, the video / audio data signal recorded on the tape recorder 119 is reproduced. Based on the vertical synchronizing signal and the synchronizing signal for audio signal sampling input from the synchronizing signal generator 104, the video signal and the audio signal synchronized with the respective synchronizing signals are reproduced.

Next, the video / audio signal reproduced by the channel decoding unit 120 is subjected to serial-parallel conversion, demodulation of recording modulation is performed, the time correction is performed by the time correction unit 121, and the ECC is corrected by the error correction unit 122. Error correction processing based on the
At 23, the data shuffled is returned to the original position, and a transmission video / audio signal is generated. Then, the video / audio signal reproduced in this way is packetized by the packetizing section 134, and the parity adding section 13
5, the parity is added, and the transmission unit 136 transmits the parity to the channel selector 200.

Then, in the channel selector 200, the receiving section 201 makes each of the camcorders 100-1 and 100-2
Video / audio signals sequentially input from
Convert to parallel data and channel decode,
An error detection unit 202 detects an error on a packet basis, a packet decomposing unit 203 decomposes the packet, and a distributor 204 outputs the two camcorders 100-1 and 100-1.
It is divided into two-channel video / audio signals sent from 0-2.

When one of the two channel signals is selected by the selector 205, the video / audio signal is edited. At this time, for example, video data of the data of the two channels divided at this time is generated based on the vertical synchronizing signal of the same timing, so that the frame structure is completely as shown in FIGS. 4A and 4B. It is the same synchronized signal. As a result, even if the signal is simply switched by the selector 205, as shown in FIG. 4C, the switching can be performed appropriately without causing temporal distortion in the switching portion. Then, the edited video / audio signal is packetized by a packetizing unit 206, a parity is added by a parity adding unit 207, and transmitted by a transmitting unit 208.

As described above, in the video editing system 10 according to the present embodiment, a plurality of video / audio signals transmitted via the digital interface are not provided with a buffer for absorbing a phase difference. Editing can be performed appropriately only by switching with the channel selector.

Note that the present invention is not limited to the present embodiment, and various suitable modifications are possible. For example, in the camcorder 100 according to the above-described embodiment, a GPS signal is received, and synchronization can be achieved between distant camcorders using the GPS signal. But,
The reference signal is not limited to the GPS signal. For example, in various countries around the world, short-wave standard radio waves are emitted for various services to radio stations. Furthermore, in recent years, the output of long-wave standard radio waves has been enhanced in Japan, and is being used for time adjustment in so-called radio timepieces in fields other than the field of wireless communication. Such a standard radio wave may be received, and a synchronization signal may be generated based on the received standard radio wave.

In the present embodiment, the present invention has been described by exemplifying a consumer digital video cassette recorder and a system using the same. However, the present invention is applicable to any apparatus which processes data by sampling. Applicable. For example, the present invention can be applied to a digital audio device that records only an audio signal, a measuring device that monitors a time change, and the like.

[0068]

As described above, according to the present invention, it is possible to easily and accurately synchronize each device without connecting the device by wire, thereby appropriately editing the image data and the audio data. A signal processing system and a signal processing method capable of performing the above. In addition, a video for generating image data that can easily and accurately synchronize with another device without being connected to another device by wire, thereby enabling an image data to be appropriately edited. A camera can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a video editing system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a detailed configuration of a camcorder of the video editing system shown in FIG.

FIG. 3 is a block diagram showing a detailed configuration of a channel selector of the video editing system shown in FIG. 1;

FIG. 4 is a diagram for explaining a switching state of image data in the video editing system shown in FIG. 1;

FIG. 5 is a diagram for explaining a conventional image data switching method using a frame buffer.

[Explanation of symbols]

1: video editing system, 100: camcorder, 101
... Photographing unit (PCT), 102 ... Microphone (MI
C), 103: GPS decoder, 104: Synchronous signal generator (PLL), 105: Video signal analog / digital converter (A / D), 106: Blocking / shuffling unit, 107: DCT unit, 108: Coding unit , 10
9: framing unit, 110: audio signal analog /
Digital conversion unit (A / D), 111: interleave unit, 112: multiplex unit (MUX), 113: first switch, 116: deshuffling unit, 117: parity generation unit (PTG), 118: channel encoding unit 119, a tape recorder, 120, a channel decoding unit, 121, a time correction unit (TBC), 122,
Error correction unit (ECC), 123 ... shuffling unit,
124 ... second switch, 125 ... separator (DMU)
X), 126 ... frame disassembly unit (DEFRAMING), 127 ...
Decoding unit, 128 ... Inverse DCT unit (IDCT), 129 ...
Deblocking / deshuffling unit, 130 ... video signal digital / analog conversion unit (D / A), 131 ...
Deinterleave section, 132: audio signal digital / analog conversion section (A / D), 133: third switch, 134: packetization section, 135: parity addition section (PTG), 136 ... transmission section (DRIVER), 137 ... Receiving unit, 138 ... Error detecting unit, 139 ... Packet decomposing unit (DEPACKET), 140 ... Monitor (MON), 141 ... Speaker (SP), 200 ... Channel selector, 201 ...
Receiving unit (RECEIVER), 202: Error detecting unit, 203: Packet decomposing unit (DEPACKET), 204: Distributor, 205: Selector, 206: Packetizing unit (PACKE)
T), 207: parity addition unit (PTS), 208: transmission unit (DRIVER)

Claims (13)

[Claims] 1. A plurality of signal generators each generating a desired AV signal having one or both of an audio signal and a video signal, comprising: a receiving means for receiving a predetermined radio wave defining a standard time; A synchronization signal generating means for generating a predetermined synchronization signal based on the received standard radio wave, and an AV signal generation means for generating the desired AV signal defined based on the generated synchronization signal. A plurality of signal generation devices, and a plurality of AVs generated by the plurality of signal generation devices
A signal processing device for editing a signal to generate a desired AV signal. 2. The apparatus according to claim 1, wherein each of the signal generation devices further includes an imaging unit configured to capture a desired video, wherein the AV signal generation unit is configured to synchronize a predetermined synchronization with the generated synchronization signal based on the captured video. The signal processing system according to claim 1, wherein the signal processing system generates a video signal in a format. 3. Each of the signal generation devices further includes audio signal input means for receiving a desired audio signal, and the AV signal generation means converts the input audio signal into the generated synchronization signal. 2. The signal processing system according to claim 1, wherein sampling is performed at a predetermined sampling timing based on the signal, and a predetermined digital audio signal is generated. 4. The signal processing system according to claim 1, wherein said receiving means receives a long-wave standard radio wave. 5. The signal processing system according to claim 1, wherein the signal processing device generates a desired AV signal by sequentially switching a plurality of AV signals generated by the plurality of signal generation devices. 6. A plurality of signal generators each receiving a predetermined radio wave defining a standard time, and each of the plurality of signal generators generates a predetermined synchronization signal based on the received standard radio wave. In each of the plurality of signal generation devices, a desired AV having one or both of an audio signal and a video signal defined based on the generated synchronization signal is provided.
A plurality of AV signals generated by the plurality of signal generation devices;
A signal processing method for editing a signal to generate a desired AV signal. 7. In the plurality of signal generation devices,
A desired image is taken, and in each of the plurality of signal generation devices, based on the taken image, a video signal of a predetermined format synchronized with the generated synchronization signal is generated. 7. The signal processing method according to claim 6, wherein a plurality of generated video signals are edited to generate a desired video signal. 8. Each of the signal generators samples an input audio signal at a predetermined sampling timing based on the generated synchronization signal.
7. The signal processing method according to claim 6, wherein a predetermined digital audio signal is generated, and a plurality of digital audio signals generated by the plurality of signal generation devices are edited to generate a desired audio signal. 9. In the plurality of signal generation devices,
7. The signal processing method according to claim 6, wherein a long-wave standard time signal is received, and each of the plurality of signal generation devices generates a predetermined synchronization signal based on the received long-wave standard time signal. 10. The editing includes a process of generating a desired AV signal by sequentially switching a plurality of AV signals generated by the plurality of signal generation devices.
3. The signal processing method according to 1. 11. A receiving means for receiving a predetermined radio wave defining a standard time, a synchronizing signal generating means for generating a predetermined synchronizing signal based on the received standard radio wave, and an imaging means for photographing a desired image A video signal generating unit configured to generate a video signal of a predetermined format synchronized with the generated synchronization signal based on the captured video. 12. An audio signal input means for inputting a desired audio signal, and sampling the input audio signal at a predetermined sampling timing based on the generated synchronization signal to generate a predetermined digital audio signal. 12. The video camera according to claim 11, further comprising an audio signal generating unit that performs the operation. 13. The video camera according to claim 11, wherein said receiving means receives a long-wave standard radio wave.