JPH08317341A - Data transmitting method - Google Patents

Abstract

PURPOSE: To provide a data transmitter with which different pieces of NVOD data can be continuously generated while having respectively different time intervals. CONSTITUTION: An MO changer 12 reproduces compile data AVD1 -AVD3 from MO disks 101 -103 . A selection/distribution circuit 14, FIFO memories 161 and 163 and decoder circuits 181 and 183 further generate NVOD data MVA1 and MVA2 of a second film successively to NVOD data MVA of a first film and output them to communication channels CH1 and CH3. The selection/distribution circuit 14, FIFO memories 162 and 164 and decoder circuits 181 and 18, generate the NVOD data MVA and output them to the communication channels CH1 and CH3 and together with its end, the transmission of NVOD data is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
Continuous near video on demand (NVOD; each having a predetermined time difference from video data (AV data))
The present invention relates to a data transmission method for generating and transmitting AV data of the Near Video On Demand) system.

[0002]

2. Description of the Related Art At present, one audio / video data (AV data) is equally divided into a predetermined number and distributed to viewers via different communication channels with a time difference corresponding to the length of the divided AV data. Near Video On Demand (NVOD) method has been proposed. NVOD system A
As V data (NVOD data), for example, compile data obtained by converting (compiling) original AV data such as a movie into an array suitable for generating NVOD data is recorded in a recording medium in advance, and the compile data is recorded from this recording medium. Is reproduced, the array of the reproduced compiled data is buffered, and further converted into NVOD data corresponding to each communication channel.

[0003]

The AV data and the compile data described above can be randomly accessed from a magneto-optical disk (MO disk) or the like, instead of a video tape, from the viewpoint of convenience of generating the compile data and reading speed. It is recorded on a recording medium. However, currently, the compilation data that can be recorded on one MO disc is about 120 minutes, and when the MO disc is used, NVOD data such as movies exceeding the recording capacity (120 minutes) of one MO disc is used. Is generally difficult to generate.

In such a case, a method of separately recording the compile data generated from the AV data recorded on a plurality of MO discs on a plurality of MO discs can be considered. However, when the compile data generated by the same method as the conventional method is simply recorded on a plurality of MO disks, the AV data originally recorded on different MO disks are mixed in the compile data recorded on the same MO disk. become. Therefore, the compiled data recorded on the MO disc by such a method cannot be used except when NVOD data such as a movie of a specific combination is continuously distributed, which impairs the flexibility of operation of the NVOD system. It will happen.

Further, since it is necessary to read all the compiled data of a plurality of movies or the like from the same MO disk at every NVOD data time interval, the compiled data read speed at the time of generating NVOD data becomes very high. There is a problem that a general MO disk device may not be used.

The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to easily generate continuous NVOD data from the compiled data recorded on a plurality of MO disks, which makes it possible to generate a long time. Another object is to provide a data transmission method capable of distributing NVOD data such as a plurality of movies.

Further, according to the present invention, even when the compile data is generated from the AV data recorded on the plurality of MO discs to generate the plurality of MO discs, the same M is generated.
It is an object of the present invention to provide a data transmission method in which it is not necessary to mix AV data originally recorded in different MO discs with compile data recorded in an O disc.

Further, according to the present invention, when the NVOD data is generated, it is not necessary to read all the compiled data of a plurality of movies or the like from the same MO disk at high speed, and a general MO disk device is used for a long time. Another object is to provide a data transmission method capable of continuously generating NVOD data of a plurality of movies and the like. It is another object of the present invention to provide a data transmission method capable of continuously generating a different number of NVOD data having different time intervals when generating NVOD data.

[0009]

In order to achieve the above object, a data transmission method according to the present invention uses a first audio / video data and a second audio / video data each having a predetermined number. Audio / video data having a first time difference having a time interval and audio having a second time difference
A data transmission method of generating video data and continuously transmitting audio / video data having these time differences to corresponding predetermined channels, wherein the first time difference is calculated from the first audio / video data. Generate audio / video data and send it to each of the predetermined channels, generate audio / video data having the second time difference from the second audio / video data, and send the audio / video data to one of the predetermined channels. Each time the transmission of the audio / video data having the first time difference is completed, the boundary of the time interval is first generated after the transmission of the audio / video data having the first time difference is completed. Voice with a second time difference
The video data is transmitted to the predetermined channel after the transmission of the audio / video data having the first time difference is completed.

Preferably, the number of audio / video data having the second time difference is smaller than the number of audio / video data having the first time difference, and the number of audio / video data is set to any one of the predetermined channels. After the transmission of the audio / video data having the first time difference is completed and before the other audio / video data having the first time difference is completed, the audio / video data having the second time difference is obtained. If the boundary of the time interval is not generated, the audio / video data having the first time difference to the predetermined channel and the transmission of the audio / video data having the first time difference have been completed, and the audio / video data having the first time difference. The transmission of audio / video data having a time difference of 2 is stopped.

[0011] Preferably, there are more predetermined channels than the number of audio / video data having the first time difference, and audio having the first time difference is used by using a part of these predetermined channels. When the video data is transmitted and the number of audio / video data having the second time difference is larger than the number of audio / video data having the first time difference, any one of the predetermined channels After the transmission of the audio / video data having the first time difference is completed, the audio / video having the second time difference until the end of the other audio / video data having the first time difference. When multiple boundaries of the time interval of the data are generated,
The audio / video data having the second time difference in which the boundaries of the time intervals are generated after the second time in the period are respectively the audio / video data having the first time difference and the audio having the second time difference. -Transmit to the predetermined channel that is not used for transmitting video data.

[0012]

The data transmission method according to the present invention is, for example, a CA
In a TV broadcasting station or the like, a predetermined number of pieces of data are respectively recorded from the first and second audio / video data (AV data) such as a movie.
The audio / video data (NV) having the first and second time differences used for the near video on demand (NVOD) service has audio / video with a predetermined time difference.
OD data), and these NVOD data are continuously transmitted to a corresponding predetermined channel to be distributed to a viewer. The first and second AV data are respectively generated as NVOD data. The first and second NVOD data are generated from the first and second data (compiled data) converted into an array suitable for performing.

First, of the generated NVOD data, the first
Of the NVOD data are sent to the corresponding channels. When the time has elapsed, the sending of the first NVOD data to any of the above channels is terminated until then. First
After the end of the transmission of the NVOD data of the first NVOD data, the second NVOD data in which the boundary of the time interval is first generated is set to the first NOD.
The VOD data is sent to the channel for which transmission has been completed, and the first and second NVOD data are continuously sent to the same channel.

[0014]

First Embodiment A first embodiment of the present invention will be described below.
FIG. 1 illustrates a process of generating a processing unit Di _j included in compile data from AV data, which is suitable for generating NVOD data having a time interval obtained by equally dividing audio / video data (AV data) into m, It is a figure which illustrates about the case of n = 4, (A) shows original AV data,
(B) shows the order in which the processing units Di _j are recorded on the recording medium.

When the AV data of the time length L compressed and encoded by MPEG or the like is divided into m equal parts, and the processing unit Di _j of the compile data suitable for generating the NVOD data shifted by L / m is generated. , As shown in FIG. 1 (A), the original AV data is separated by m at time intervals L / m.
The processing is performed by equally dividing it into n equal periods and dividing into periods of time length L / m · n (m and n are integers). In this way, the AV data is divided into m equal parts and then into n equal parts, which is N to generate NVOD data from the compiled data.
This is because the data capacity that can be processed at one time is limited by the capacity of the FIFO used in the VOD system.

[0016] When recording compile data on the recording medium, for example, as shown in a period S1~S4 of FIG. 1 (B), a predetermined i-th unit of processing Di ₁ -DI _n recording medium in the recording Record in the area at intervals. In this way, by repeating recording m times, the processing unit Di
All of _j are finally recorded on the recording medium as shown in the period S4 of FIG. 1 (B).

FIG. 2 is a diagram exemplifying a process of generating NVOD data from the processing unit Di _j generated by the process shown in FIG. 1 in the case of m, n = 4.
(A) shows the processing unit Di _j , and (B) to (E) show the generated NVOD data.

When the processing unit Di _j recorded on the recording medium as shown in FIG. 1 is read to generate NVOD data, as shown in FIG. 2A, a period S1 corresponding to the time interval L / m is obtained. ~ Processing unit D in each period S4
_Read all i _j . Read processing unit Di
_The array of _j is converted as shown in FIGS. 2B to 2E, and NVOD data corresponding to each corresponding channel is generated.

When AV data is simply recorded on an MO disc, it is necessary to access regions of the MO disc that are separated from each other every time the data is read. But,
As described above, by storing the compiled data in which the array of AV data is changed in advance in the MO disc, the data can be read out by accessing the continuous area of the MO disc. The device can be used to configure an NVOD system. If the FIFO capacity of the NVOD system for generating the NVOD data shown in FIG. 1 is sufficiently large, the compile data is further divided into NVOD data time intervals and processed as a processing unit (Di _j ) corresponding to the cycle. do not have to.

[0020]

[Second Embodiment] A second embodiment of the present invention will be described below.
FIG. 3 is a diagram showing the configuration of the NVOD data transmission device 1 according to the present invention in the second embodiment.

As shown in FIG. 3, the NVOD data transmission device is
The device 1 includes an MO changer 12, a selection / distribution circuit (S /
D) 14, FIFO memory 16₁~ 16_r(R is an integer
Number), decoder circuit (DEC) 18₁~ 18_rAnd control
The MO changer 12 is composed of a control circuit 20.
O disk device (MOD₁~ MOD_k) 120₁~ 12
0 _k(K is an integer) and provides a NVOD service.
MO at a bull television (CATV) broadcasting station etc.
Disc (MO1 to MOk) 10₁-10_kTo each
Recorded compilation data AVD₁~ AVD_kPlay
Compiled data AVD reproduced₁~ AVD_kThat
From each, NVOD data TRD₁~ TRD_rGenerate
It continuously transmits to the communication channels CH1 to CHr.
It

Each of the MO disks 10 ₁ to 10 _k is compression-encoded by MPEG or the like.
According to the method shown in FIG. 1, from each divided portion of AV data such as a movie having a length (data amount) exceeding the recording time (storage capacity) of one MO disc, or from AV data of a plurality of movies. Generated compile data AVD ₁ ~
AVD _k is recorded. The control circuit 20, control signals _{C12, C14, C16 1 ~C16 r} , C18 1 ~C1
The operation of each component of the NVOD data transmission device 1 is controlled via 8 _r .

Under the control of the control circuit 20, the MO changer 12 selects the MO disks 10 ₁ to 10 _{k on} which the compile data AVD _{1 to} AVD _k used to generate the NVOD data to be distributed to the viewer are recorded, and the MO changer 12 is selected. The disk devices 120 _{1 to} 120 _k are reproducibly mounted. MO disk device 120 _{1 to} 120 _k
Are the compile data AVD _{1 to} A shown in the first embodiment from the loaded MO disks 10 ₁ to 10 _k .
VD _{k corresponds} to the time interval (L / m shown in FIG. 1) of the NVOD data TRD _{1 to} TRD _r (FIG. 2).
All are reproduced for each of the periods S1 to S4) shown in (4) and output to the selection / distribution circuit 14.

The selection / distribution circuit 14 complies with the compile data AVD _{1 to} AVD input from the MO changer 12.
_{Of k} , communication channels CH1 to CH at each of the above time intervals
A data stream S14 including all parts to be sent to r is generated. The operation of the selection / distribution circuit 14 will be described later with reference to FIGS. 5 and 6.

The FIFO memories 16 _{1 to} 16 _r divide the above-mentioned time interval into n pieces for the portions to be sent to the corresponding communication channels CH 1 to CHr from the data streams input from the selection / distribution circuit 14, respectively. In each of the predetermined cycles (L / m · n shown in FIG. 1), the NVOD data S16 _{1 to} S16 _r are taken out and buffered to generate the NVOD data in the decoder circuits 18 ₁ to 18 _r . Output to. In addition, FI
The operation of the FO memories 16 _{1 to} 16 _r will be described later with reference to FIGS. 7 and 8.

The decoder circuits 18 ₁ to 18 _r are NVOD.
The data S16 _{1 to} S16 _r are decompressed and decoded, NVOD data TRD _{1 to} TRD _r are generated, and communication channels CH1 to CH1 are generated.
Output to CHr. Among the components of the NVOD data transmission device 1, the MO changer 12 corresponds to the audio / video data generating means according to the present invention, and the selection / distribution circuit 14 corresponds to the data stream generating means according to the present invention. The FIFO memories 16 _{1 to} 16 _r correspond to the audio / video data generating means having the time difference according to the present invention, and the decoder circuits 18 ₁ to 18 _r correspond to the data transmitting means according to the present invention.

Hereinafter, referring to FIGS. 4 to 8, the NVO will be described.
The operation of the D data transmission device 1 will be described. For the sake of brevity and clarity, N when k = 1 and r = 4
In the VOD data transmission device 1 (FIG. 3), a movie of 240 minutes (length of two MO disks) is divided into two in the first half and the second half.
NVOD data having a time interval of 30 minutes, respectively, by reproducing MO discs (MO1, MO2) 10 ₁ and 10 ₂ on which compilation data AVD ₁ and AVD ₂ respectively generated from two pieces of divided 120 minutes of AV data are recorded. A case of generating TRD _{1 to} TRD ₄ will be described as an example.

FIG. 4 shows the MO disk 10 ₂ shown in FIG.
Compiled data AVD ₂ and processing units D5 _{1 to} D8 included in the compiled data AVD ₂
FIG. ₄ is a diagram showing FIG. ₄ , in which (A) is compile data AVD.
₂ shows a, (B) ~ (E) shows the processing unit D5 ₁ ~ D8 included in the NVOD data when generating NVOD data from only compiled data AVD ₂ recorded on the MO disc 10 _2. FIG. 5 shows compiled data AV read by the MO disks 10 ₁ and 10 ₂ shown in FIG. 3 in the periods S1 to S8 shown in FIGS. 2 and 4, respectively.
D ₁ , AVD ₂ and processing units D _{1 1} included therein
~ D8 ₄ shows the shows the (A) shows a processing unit D1 ₁ to D4 ₄ included in the compiled data AVD _1, (B) the contents of D5 ₁ ~ D8 ₄ included in the compiled data AVD _2, (C ) shows the corresponding time interval S1~S8 and compiling data AVD _1, AVD _2.

FIG. 6 shows the periods S1 to S1 shown in FIG.
In S8, the data generated by the selection / distribution circuit 14 is
FIG. 3A is a diagram showing the contents of a data stream S14,
To (H) are data streams in the periods S1 to S8, respectively.
The contents of the stream S14 are shown. FIG. 7 is shown in FIG.
In each of the periods S1 to S4, the FIFO memory 16 ₁
~ 16_FourNVOD data S16 generated by₁~ S
16_FourIt is a figure showing the contents of (A)-(D),
NVOD data S16 in the respective periods S1 to S8₁
~ S16_FourIndicates the contents of.

FIG. 8 shows the periods S5 to S5 shown in FIG.
In S8, the FIFO memory 16 ₁~ 16_FourRaw by
NVOD data S16 created₁~ S16_FourShows the contents of
(A) to (D) are periods S1 to S1, respectively.
NVOD data in S8 S16₁~ S16_FourContent of
Is shown. In addition, in each figure below, a triangle with a name
The mark indicates the start position (playback start position) of the data with that name.
Show.

The MO disc 10 ₁ has the first half 12 of the movie.
Compiled from 0 minute of the AV data were generated as shown in FIG. 1 data AVD ₁ and (processing unit D1 ₁ to D4 ₄₎ is recorded, MO disk device 120 _1, the MO disk 10 _1, 2 ( The compile data AVD ₁ is read as shown in A). As shown in FIG.
MO The disk 10 _2, and compiling data AVD ₂ (processing unit D5 ₁ ~ D8 ₄₎ produced in the same manner as the method described from the AV data of the second half 120-minute movie 1 is recorded, MO disk drive 120 ₂ is MO disk 1
Compile data AVD ₂ is read from 0 ₂ . In addition,
Compiled data AV recorded on the MO disc 10 _2.
When NVOD data is generated from D ₂ only, the process shown in FIG.
NVOD data similar to that shown in FIGS. 2B to 2E, as shown in FIGS. 2B to 2E, will be generated.

As shown in FIGS. 5A and 5B, the MO disks 10 ₁ and 10 ₂ have NVOD data TR, respectively.
Period corresponding to the time interval D ₁ ~TRD ₄ S1~S8
(Corresponding to period S1 to period S4 shown in FIGS. 2 and 4)
Each time, all of the compile data AVD ₁ and AVD ₂ are read and output to the selection / distribution circuit 14. The selection / distribution circuit 14, as shown in FIGS.
In each of the periods S1 to S8, the communication channel CH1 to
Compile data AVD ₁ , AVD sent to CH4
_A data stream S14 including the _second part is generated, and FI
Output to the FO memories 16 _{1 to} 16 ₄ .

Each of the FIFO memories 16 _{1 to} 16 ₄ has a data stream S as shown in FIGS. 7 and 8.
14 to NVs to be transmitted to the corresponding communication channels CH1 to CH4 at time intervals S1 to S8, respectively.
Processing units D1 ₁ to compile data AVD ₁ and AVD ₂ to be included in OD data TRD _{1 to} TRD ₄
D8 ₄ is taken out and NVOD data S16 _{1 to} S16 ₄
Is generated and output to the decoder circuits 18 ₁ to 18 ₄ . Each of the decoder circuits 18 ₁ to 18 ₄ has an NVOD.
Data S16 ₁ ~S16 ₄ and extension decoding, the communication channel CH1~CH as NVOD data TRD ₁ ~TRD ₄
4 It sends to each.

As described above, according to the NVOD data transmitting apparatus 1 according to the present invention in the second embodiment, NV data can be extracted from the compiled data recorded on a plurality of MO disks.
OD data can be generated. Further, according to the NVOD data sending device 1, the compile data recorded on the same MO disc does not include AV data originally recorded on different MO discs. NVOD data can be continuously distributed from AV data such as an arbitrary combination of movies, and the NVOD system can be flexibly operated. Further, since the compile data recorded on a plurality of MO disks is read from each MO disk, it is possible to configure using a general MO disk device.

As described above, the compile data is
It does not have to be generated from AV data obtained by dividing the same movie or the like, and may be generated from each AV data of a plurality of movies or the like. In addition, in the second embodiment, the NVOD data transmission device 1 is set to k = 2 and m = 4.
The operation has been described above, but the NVOD data transmission device 1 can take an arbitrary configuration within the range of k ≧ 2 and m ≧ 2. Further, the number of NVOD data that can be continuously distributed by the NVOD data transmission device 1 is not limited to two, and k
In the configuration of ≧ 3, the NVOD data transmission device 1 is appropriately
Is operated, it is possible to continuously deliver an arbitrary number of NVOD data.

[0036]

Third Embodiment A third embodiment of the present invention will be described below.
FIG. 9 is a diagram showing the configuration of the NVOD data transmission device 3 according to the present invention in the third embodiment. In addition, NVOD
Of the components of the data transmission device 3, the NVO shown in FIG.
The same components as those of the D data transmission device 1 are designated by the same reference numerals. FIG. 10 shows the NVO shown in FIG.
3 is a diagram showing a configuration of FIFO circuits 32 _{1 to} 32 _k of the D data transmission device 3. FIG.

As shown in FIG. 9, the NVOD data transmission device is
The device 3 is the NV shown in the second embodiment having the same function.
It is a modification of the OD data transmission device 1, and is an MO change.
12 and distribution circuit (D) 30₁~ 30_k, FIFO times
Road 32₁~ 32_k, Selection circuit 34₁~ 34_r,decoder
Circuit 18₁~ 18_rAnd a control circuit 36,
FIFO circuit 32₁~ 32_kAs shown in FIG.
Selection circuit 34₁~ 34_kFIFO memo corresponding to
Re 320_s1~ 320_sr(1 ≦ s ≦ k).
That is, the NVOD data transmission device 3 is
Distributes the function of the selection / distribution circuit 14 of the transmission device 1 (FIG. 3)
Circuit 30₁~ 30_kAnd selection circuit 34 ₁~ 34_rMinutes
It is configured to be realized.

The control circuit 36 controls the control signals C12 and C30.
_{1 ~C30 k, C32 1 ~C32 r} , C18 1 ~C18
The operation of each component of the NVOD data transmission device 3 is controlled via _r . The distribution circuits 30 ₁ to 30 _k use the compiled data AVD _{1 to} AV reproduced by the MO changer 12.
Each D _k is output to the FIFO circuits 32 _{1 to} 32 _k as distribution data S30 _{1 to} S30 _k .

FIFO circuit 32₁~ 32_kEach F
IFO memory 320_s1~ 320_srIs the distribution circuit 30₁~
30_kDistribution data S30 input from each₁~ S
30 _kFrom NVOD data TRD₁, TRD₂time of
Interval FIFO memory 320 ₁~ 320_rMemory time, etc.
A predetermined cycle divided in accordance with (L / m
n) Corresponding communication channels CH1 to C in each
The part to be sent to Hr is taken out, buffered, and
Buffering data S32₁~ S32_kAs selection circuit
34₁~ 34_rOutput to.

The selection circuits 34 _{1 to} 34 _r process units D _{1 1 to} D 8 of the compiled data AVD _{1 to} AVD _k included in the buffering data S 32 _{1 to} S 32 _k, respectively.
Communication channel C corresponding to each of the above predetermined cycles out of _four
Decoder circuits 18 ₁ to 18 ₁ are selected by selecting the ones to be output to H _{1 to} CHr to generate NVOD data S 34 _{1 to} S 34 _r.
Output to 8 _r .

Hereinafter, referring again to FIG. 5 to FIG.
The operation of the data transmission device 3 will be described. For simplification and clarity of explanation, k = 2 and r = as in the second embodiment.
In the NVOD data transmission device 3 when the number is 4, 2
A MO disc (MO1, MO2) that records compile data AVD ₁ and AVD ₂ respectively generated from two 120-minute AV data obtained by dividing a movie of 40 minutes (length of two MO discs) into the first half and the second half. ) 10 ₁ , 1
NV playing 0 ₂ each with a time interval of 30 minutes
A case of generating the OD data TRD _{1 to} TRD ₄ will be described as an example.

The MO changer 12 is used for the MO disc 1 in the same manner as in the NVOD data transmission device 1 (FIG. 3).
0 _1, compile data AVD ₁ from 10 _2, AVD ₂
Of all, as shown in FIG. 5, respectively period corresponds to the time interval NVOD data TRD ₁ ~TRD ₄ S1~
The data is read every S8, and the distribution circuits 30 ₁ and 30 ₂ distribute this to the FIFO circuits 32 ₁ and 32 ₂ .

FIFO memory 32 of FIFO circuit 32 ₁
0 _{1-320 4,} NVOD data TRD _1, TRD ₂
Corresponding to the time interval (periods S1 to S in FIG. 5).
Compiled data AVD
Processing units included in _{1 D1 1 ~D1 4, D2 1} ~D
2 ₄ , D3 _{1 to} D3 ₄ , and D4 _{1 to} D4 ₄ are buffered, and buffered data S320 _{11 to} S3, respectively.
20 ₁₄ is sequentially output to the selection circuits 34 _{1 to} 34 ₄ .

FIFO memory 32 of FIFO circuit 32 ₂
0 _{1-320 4,} similar to the FIFO circuit 32 ₁ of the FIFO memory 320 _{1-320 4,} NVOD data TRD
₁ , processing unit D5 ₁ included in compiled data AVD ₂ for each period corresponding to the time interval of TRD _{2
~D5 4, D6 1 ~D6 4,} D7 1 ~D7 4, D8 1 ~
D8 ₄ is buffered, and the selection circuit 3 is sequentially provided as buffering data S320 _{21 to} S320 _24.
4 and outputs it to the _{1-34 4.}

Selection circuit 34₁Are periods S1 to S8 (Fig.
5) In each, the FIFO circuit 32₁, 32₂Or
Buffering data S320₁₁~ S320₁₄, S
320 _{twenty one}~ S320_{twenty four}To select the decoder circuit 18₁To
Output to. Selection circuit 34₂Is the period S1 to S8
In each case, the FIFO circuit 32₁, 32₂From the
Buffering data S320₁₄, S320_{twenty one}~ S320
_{twenty four}, S320₁₁~ S320₁₃Select the decoder circuit 1
8₁Output to.

The selection circuit 34 ₃ receives the buffering data S320 ₁₃ , S320 ₁₄ , S320 _21- from the FIFO circuits 32 ₁ , 32 ₂ in the respective periods S1-S8.
S320 ₂₄ , S320 ₁₁ , and S320 ₁₂ are selected and output to the decoder circuit 18 ₁ . The selection circuit 34 ₄ receives the FIFO circuits 32 ₁ ,
Buffering data S320 _{12 to} S32 from 32 ₂
0 ₁₄ , S320 _{21 to} S320 ₂₄ , S320 ₁₁ are selected,
It outputs to the decoder circuit 18 ₁ .

By the operation of the selection circuits 34 _{1 to} 34 ₄ described here, the buffering data S320 ₁₁ to S320 ₁₄ , S320 ₂₁ to from the FIFO circuits 32 _{1 to} 32 _k.
S320 ₂₄ (S32 ₁ , S32 ₂ ) is the same as in FIG. 7 and FIG.
The NVOD data S34 ₁ rearranged in the sequence shown in
~ S34 ₄ is input to the decoder circuits 18 ₁ to 18 ₄ . Decoder circuit 18 _1-18
4, respectively expands and decodes the NVOD data S34 ₁ ~S34 _4, and sends the communication channel CH1~CH4 respectively as NVOD data TRD ₁ ~TRD _4.

As described above, the NVOD according to the present invention
According to the data transmission device 3, the NVOD data transmission device 1
A function equivalent to that shown in FIG. 3 can be realized. Also,
In the NVOD data transmission device 3, the compile data recorded on the same MO disc does not include AV data originally recorded on different MO discs.
It has the same advantages as the OD data transmission device 1.

Furthermore, since the hardware amount of the NVOD data transmission device 3 needs to be increased in FIFO, etc.
The number is larger than that of the D data transmission device 1. However, NVOD
In the data transmission device 3, the compiled data AVD
_{Since the} processing units D1 _{1 to} D8 ₄ included in _{1 to} AVD _k are buffered in parallel in each cycle, when the k and r are the same, the NVOD data transmission device 1 requires a higher speed operation for each component. Not done. Therefore, the NVOD data transmission devices 1 and 3 can be selected according to the configuration of the NVOD system or the usage of the NVOD data transmission device. The NVOD data transmission device 3 can be modified in the same manner as the NVOD data transmission device 1.

[0050]

[Fourth Embodiment] A fourth embodiment of the present invention will be described below.
FIG. 11 is an NVO according to the present invention shown in FIGS. 3 and 9.
The D data transmission devices 1 and 3 first transmit NVOD data for four channels having a time interval of 30 minutes, and then 60
It is a figure which shows the operation | movement which transmits the NVOD data of 2 channels which have a time interval of a minute, Comprising: (A)-(D), NVOD data transmission apparatuses 1 and 3 are the communication channel C, respectively.
The NVOD data sent to H1 to CH4 is shown.

NVOD shown in the second and third embodiments
There may be cases where it is desired to send NVOD data having different time intervals using the data sending devices 1 and 3 (FIGS. 3 and 9). Hereinafter, the operation of the NVOD data transmission devices 1 and 3 in such a case will be described with reference to the NVOD data transmission device 1
With k = 3 and r = 4, the NVOD data MVA having a time interval of 30 minutes is generated from the compiled data generated from the AV data of the first movie for 120 minutes, and 2
An example will be described in which NVOD data MVB ₁ and MVB ₂ having a time interval of 60 minutes are generated from the compiled data generated from the AV data of the 40-minute second movie.

The MO discs 10 ₁ to 10 ₃ record the compile data of the first movie, the compile data of the first half of the second movie, and the compile data of the third movie, and the MO discs of the MO changer 12 are recorded. Device 1
20 _{1 to} 120 ₃ read these compile data and output them as compile data AVD _{1 to} AVD ₃ to the selection / distribution circuit 14.

Selection / distribution circuit 14, FIFO memory 16
₁~ 16_FourAnd decoder circuit 18 ₁~ 18_FourFigure 1
As shown in 1 (A) to (D), the NVOD of the first movie
Data MVA is generated, and communication channels CH1 to CH1 are generated, respectively.
Output to CH4. Selection / distribution circuit 14, FIF
O memory 16₁, 16₃And decoder circuit 18 ₁, 1
8₃Is the first image as shown in FIGS. 11 (A) and 11 (C).
After the NVOD data MVA of the image, the second image
Image NVOD data MVA₁, MVA₂Continuously generate
Output to communication channels CH1 and CH3 respectively
I do. FIFO memory 16₂, 16_FourAnd decoder times
Road 18₂, 18_FourAs shown in FIGS. 11 (B) and 11 (D).
Then, the generation of the NVOD data MVA of the first movie is completed.
At that point, the transmission of NVOD data is stopped.

That is, the selection / distribution circuit 14, the FIFO memories 16 _{1 to} 16 ₈ and the decoder circuits 18 ₁ to 18 ₈
Is the case where the number of NVOD data MVB ₁ and MVB ₂ is smaller than the number of NVOD data MVA, and the channel CH
When the boundary between the time intervals of the NVOD data MVB ₁ and MVB ₂ is not generated in the period after the transmission of the NVOD data MVA to the channel 2 is completed and before the transmission of the NVOD data MVA to the channel CH3 is completed, These NV
Stop sending OD data to channel CH3.

The operation of the NVOD data transmission device 1 described above can be similarly realized in the NVOD data transmission device 3. In this way, the NVOD data transmission devices 1 and 3
Is operated, NVOD data having different time intervals can be generated and continuously transmitted to the communication channel.

It should be noted that the NVOD data transmission devices 1 and 3 are
= 3, r = 4
It is possible to reveal. Also, during the time shown in FIG.
Intervals are examples, NVOD data MVA, MVB ₁, M
VB₂The time interval of is arbitrary. Also, for example, NVO
If the time interval of D data MVA is 7 minutes, the time
NVOD data MVB with an interval of 12 minutes₁, MVB₂
Cannot be sent continuously to the communication channel, but the NVOD
N such as inserting 5 minutes of no broadcast time after data MVA
By operating the VOD data transmission devices 1 and 3, these N
The timing of VOD data can be adjusted.

[0057]

[Fifth Embodiment] A fifth embodiment of the present invention will be described below.
FIG. 12 is an NVO according to the present invention shown in FIGS. 3 and 9.
The D data transmission devices 1 and 3 first transmit NVOD data for four channels having a time interval of 30 minutes, and then 15
It is a figure which shows the operation | movement which transmits the NVOD data of 8 channels which have a time interval of a minute, Comprising: (A)-(H) WHEREIN: NVOD data transmission apparatuses 1 and 3 have communication channel C, respectively.
The NVOD data sent to H1 to CH8 is shown.

NVOD shown in the second and third embodiments
It may be desired to send different numbers of NVOD data with different time intervals using the data sending devices 1, 3 (FIGS. 3 and 9). In the following, the operation of the NVOD data transmission devices 1 and 3 in such a case is set to the configuration of the NVOD data transmission device 1 is k = 3 and r = 8, and is compiled from the AV data of the first movie for 120 minutes. Four NVOD data MVA having a time interval of 30 minutes are generated from the data, and eight NVOD data MVB ₁ , MVB having a time interval of 15 minutes from the compiled data generated from the AV data of the second movie of 240 minutes. A case of generating ₂ will be described as an example.

On the MO disks 10 ₁ to 10 ₃ , the compile data of the first movie, the compile data of the first half of the second movie and the compile data of the second half of the second movie are recorded. The MO disk devices 120 _{1 to} 120 ₃ read these compile data and output them as compile data AVD _{1 to} AVD ₃ to the selection / distribution circuit 14.

Selection / distribution circuit 14, FIFO memory 16
₁~ 16₈And decoder circuit 18 ₁~ 18_FourFigure 1
As shown in 1 (A) to (D), the NVOD of the first movie
Data MVA is generated, and communication channels CH1 to CH1 are generated, respectively.
Output to CH4. Selection / distribution circuit 14, FIF
O memory 16₁~ 16₈And decoder circuit 18 ₁~ 1
8₈Is the first image as shown in FIGS.
After the NVOD data MVA of the image, the second image
Image NVOD data MVA₁, MVA₂Continuously generate
Output to communication channels CH1 to CH8 respectively
I do.

That is, the selection / distribution circuit 14 and the FIFO memory
Mori 16₁~ 16₈And decoder circuit 18₁~ 18₈
Is more than the number of NVOD data MVA (4).
There are eight communication channels, and one of these communication channels
NVOD data MVA using the parts (CH1 to CH4)
Done, NVOD data MVB₁, MVB₂Number of (8)
Is greater than the number of NVOD data MVA,
NVOD data to any of the communication channels CH1 to CH4
Communication channel CH1 after the transmission of the data MVA is completed.
~ Sending NVOD data MVA to any other of CH4
NVOD data MVB in the period until the output ends₁,
MVB₂If multiple time interval boundaries are generated,
The second time interval boundary was generated in the period N
VOD data MVB₁, MVB₂Each is NVOD
Data MVA, MVB₁, MVB ₂For any output
Any of communication channels CH4 to CH8 that are not used
Send to.

The operation of the NVOD data transmission device 1 described above can be similarly realized in the NVOD data transmission device 3. In this way, the NVOD data transmission devices 1 and 3
Is operated, it is possible to generate a different number of NVOD data having different time intervals and continuously send the NVOD data to the communication channel.

It should be noted that the NVOD data transmission devices 1 and 3 are set to k
= 3 and r = 8, the same operation is performed.
It is possible to reveal. Also, during the time shown in FIG.
Intervals are examples, NVOD data MVA, MVB ₁, M
VB₂The time interval of is arbitrary. Also, for example, NVO
If the time interval of D data MVA is 7 minutes, the time
NVOD data MVB with an interval of 12 minutes₁, MVB₂
Cannot be sent continuously to the communication channel, but the NVOD
N such as inserting 5 minutes of no broadcast time after data MVA
By operating the VOD data transmission devices 1 and 3, these N
The timing of VOD data can be adjusted.

[0064]

As described above, according to the data transmission method of the present invention, it is possible to easily generate continuous NVOD data from the compiled data recorded on a plurality of MO disks, so that the NVOD data can be stored for a long time. Or N of multiple movies
VOD data can be distributed. Further, according to the data transmission method of the present invention, a plurality of M data are generated by generating compile data from AV data recorded on a plurality of MO discs.
Even if it is created on an O disc, the MO data originally recorded on the same MO disc will have different MO
It is not necessary to mix AV data recorded on the disc.

Further, according to the data transmission method of the present invention, when the NVOD data is generated, it is not necessary to read all of the compilation data of a plurality of movies or the like from the same MO disk at high speed, and a general MO disc can be used. It is possible to continuously generate NVOD data for a long time or a plurality of movies using the disk device. Further, according to the data transmission method of the present invention, when generating NVOD data, it is possible to continuously generate different numbers of NVOD data having different time intervals.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a process of generating a processing unit Di _j of compile data from AV data, which is suitable for generating NVOD data having a time interval obtained by equally dividing AV data of a movie or the like, when m and n = 4. FIG.
(A) shows the original AV data, and (B) shows the processing unit Di.
_j indicates the order of recording on the recording medium.

FIG. 2 shows a process of generating NVOD data from a processing unit Di _j generated by the process shown in FIG.
It is a figure which illustrates about the case of m and n = 4, (A)
Indicates a processing unit Di _j , and (B) to (E) indicate generated NVOD data.

FIG. 3 is a diagram showing a configuration of an NVOD data transmission device according to the present invention in a second embodiment.

[4] A diagram showing a processing unit D5 ₁ ~ D8 ₄ included in the compiled data AVD ₂ and compiling data AVD ₂ recorded on the MO disc (10 ₂₎ shown in FIG. 3, (A) is shows the compiled data _{AVD 2, (B) ~ (} E) , the processing unit D5 ₁ to D included in the NVOD data when generating NVOD data from only compiled data AVD ₂ recorded on the MO disc
8 is shown.

5 shows compilation data AVD ₁ and AVD ₂ read in the periods S1 to S8 shown in FIGS. 2 and 4 and processing units D1 _{1 to} D8 ₄ included therein, respectively, in the MO disk shown in FIG. a) shows a processing unit D1 ₁ to D4 ₄ included in the compiled data AVD _1, (B) is contained in compiling data AVD ₂ D5
The contents of _{1 to} D8 ₄ are shown, and (C) shows time intervals S1 to S8.
And the correspondence between the compile data AVD ₁ and AVD ₂ .

6 is a diagram showing the contents of a data stream S14 generated by the selection / distribution circuit shown in FIG. 3 in the respective periods S1 to S8 shown in FIG. 5 (C).
(H) shows the contents of the data stream S14 in the periods S1 to S8, respectively.

7 is an NV generated by the FIFO memory shown in FIG. 3 in each period S1 to S4 shown in FIG. 5 (C).
A diagram showing the contents of the OD data _{S16 1 ~S16 4, (A)} ~ (D) shows the contents of the NVOD data S16 ₁ ~S16 ₄ in the period S1~S8 respectively.

FIG. 8 is a diagram showing the periods S5 to S8 shown in FIG.
4A to 4D are diagrams showing the contents of NVOD data S16 _{1 to} S16 ₄ generated by the FIFO memory shown in FIG. 3, and FIGS. 4A to 4D are NVOD data S16 _{1 to} S16 in periods S1 to S8, respectively. The contents of ₄ are shown.

FIG. 9 is a diagram showing a configuration of an NVOD data transmission device according to the present invention in a third embodiment.

10 is a diagram showing a configuration of the FIFO circuit shown in FIG.

11 is an NVO according to the present invention shown in FIGS. 3 and 9. FIG.
The D data transmission device has a time interval of 30 minutes 4
It is a figure which shows the operation | movement which transmits NVOD data for channels, and next, transmits NVOD data of 2 channels which have a time interval of 60 minutes, and (A)-(D), NVOD data transmission apparatus each communicates. Channels CH1 to CH4
Shows the NVOD data sent to.

FIG. 12 is an NVO according to the present invention shown in FIGS. 3 and 9.
The D data transmission device has a time interval of 30 minutes 4
It is a figure which shows the operation | movement which transmits NVOD data for channels, and next, transmits NVOD data for 8 channels which have a time interval of 15 minutes, (A)-(H) WHEREIN: Each NVOD data transmission apparatus communicates. Channels CH1 to CH8
Shows the NVOD data sent to.

[Explanation of symbols]

1, 3 ... NVOD data transmission device, 10 ₁ to 10 _k ... M
O disk, 12 ... MO changer, 120 _1-12
0 _k ... MO disk device, 14 ... Selection / distribution circuit, 16
_{1 to} 16 _r ... FIFO memory, 18 ₁ to 18 _r ... decoder circuit, 30 ₁ to 30 _k ... distribution circuit, 32 _{1 to} 32 _k ...
FIFO circuit, 320 _{s1 to} 320 _sr ... FIFO memory,
34 _{1 to} 34 _r ... Selection circuit, 20, 36 ... Control circuit

Claims (3)

[Claims] 1. Audio / video data having a first time difference having a predetermined number of predetermined time intervals and second time difference from the first audio / video data and the second audio / video data, respectively. A data transmission method for generating audio / video data and continuously transmitting audio / video data having such a time difference to corresponding predetermined channels, wherein the first audio / video data is converted to the first audio / video data. Audio / video data having a time difference is generated and transmitted to each of the predetermined channels, audio / video data having the second time difference is generated from the second audio / video data, and any one of the predetermined channels is generated. Each time the transmission of the audio / video data having the first time difference to the end is completed, after the transmission of the audio / video data having the first time difference is completed, The boundary of the time interval is generated in the second
The data sending method of sending the audio / video data having the time difference of 1 to the predetermined channel where the sending of the audio / video data having the first time difference is completed. 2. A case where the number of audio / video data having the second time difference is smaller than the number of audio / video data having the first time difference, and the number of the audio / video data having the first time difference is set to one of the predetermined channels. After the transmission of the audio / video data having the time difference of 1 is completed and before the other audio / video data having the first time difference is completed, the audio / video data having the second time difference is recorded. If no time interval boundary is generated, the audio / video data having the first time difference and the second audio / video data having the first time difference have been transmitted to the predetermined channel. The data transmission method according to claim 1, wherein transmission of audio / video data having a time difference is stopped. 3. There are more said predetermined channels than the number of audio / video data having said first time difference, and audio / video having said first time difference using a part of these predetermined channels. When data is transmitted, and the number of audio / video data having the second time difference is larger than the number of audio / video data having the first time difference, the data is transmitted to any one of the predetermined channels. After the transmission of the audio / video data having the first time difference is completed, the other first
When a plurality of boundaries of the time intervals of the audio / video data having the second time difference are generated in the period until the audio / video data having the time difference of ‘ Each of the audio / video data having the second time difference in which the boundary of the interval is generated is used for transmitting the audio / video data having the first time difference and the audio / video data having the second time difference. The data transmission method according to claim 1, wherein the data is transmitted to the predetermined channel that does not exist.