JPH09121338A - Av data transmitter, av data receiver and broadcasting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify equipment configuration and processing and to facilitate the transmission of commercial message program in a data transmitter to be used for NVOD. SOLUTION: Partial AV data dividing AV data to be distributed every prescribed reproducing time are repeatedly distributed to respective channels when the data is transmitted. Then, the data are received while successively selecting those channels on the reception side so that the entire AV data can be viewed. Since it is enough for respective channels just to process one part of those AV data, equipment configuration and processing procedure can be simplified for both the transmitter and the receiver. Thus, the commercial message program can be reproduced together with a main program in the reception while being sent through the dedicated channel, the independency of commercial message program is improved and handling is facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AV data transmitting apparatus suitable for use in, for example, a video-on-demand system capable of delivering video data in response to a request generated at an arbitrary time, AV data receiving device,
Also, it relates to a broadcasting system.

[0002]

2. Description of the Related Art Practical application of a video-on-demand (VOD) system that provides a program in response to a request from a receiver is desired. However, a VOD system that individually responds to a request that occurs at an arbitrary time requires a data transmission device that performs a very large-scale and complicated process. Therefore, there has been proposed a near video on demand (NVOD) system capable of simplifying the configuration of the data transmission device while realizing the same function as the VOD system. The NVOD systems proposed so far have transmitted a certain program to a plurality of channels at predetermined time intervals,
It is a system for providing a program by selecting a channel from the beginning of the program from the next time zone in response to a request generated in a certain time zone.

[0003]

However, such N
The VOD system also has various problems, and there has been a demand to further reduce the device scale and simplify the processing. For example, in a data transmission device used in such an NVOD system, a recording device for recording program data must be provided for each channel.
There is a problem that the recording device becomes large-scale. Also, 1
It is possible to output the program data recorded in one recording device in parallel to a plurality of channels, but for that purpose, it is necessary to use a high-performance recording device capable of high-speed access, and the data transmission device becomes expensive. There was a problem of becoming.

Further, when actually implementing the NVOD system, it is possible to add a commercial program and distribute the main program, but there is a problem that it is difficult to insert the commercial program. For example, in a data transmitting apparatus in which data of a main program is recorded in each of a plurality of channels, a commercial program to be transmitted must be recorded or transmitted for each channel, resulting in a large amount of processing. Further, when sequentially transmitting different commercial programs, the recording format and the reproduction order are complicated.

Further, in the data receiving apparatus used for such an NVOD system, it is necessary to search the channel of which the program starts from the beginning in the next time zone from the data of the program transmitted by the plural channels. , The process was complicated. Further, in the NVOD system, the receiver may have some waiting time before starting to watch a desired program, but the waiting time is calculated based on the result of the search, and it is desired to more easily calculate the waiting time. There was a request.

Therefore, it is an object of the present invention to provide an AV data transmitting apparatus for use in an NVOD system which can simplify the apparatus configuration and processing and can easily transmit a commercial program. Another object of the present invention is to provide an AV data receiving device for use in an NVOD system that can simplify the device configuration and processing.
Another object of the present invention is such a simple structure,
Another object of the present invention is to provide a broadcasting system suitable for an NVOD system that can be appropriately inserted into commercial programs and is easy for viewers to use.

[0007]

In order to solve the above-mentioned problems, partial AV data obtained by dividing the AV data to be distributed for each predetermined reproduction time is repeatedly distributed to each channel when distributing the AV data. I decided to do it. Then, the entire AV data can be viewed by the receiving side while sequentially selecting and receiving the channel. As a result, in each channel, only a part of the AV data needs to be processed, so that the device configuration and the processing procedure of both the transmitting device and the receiving device are greatly simplified. Further, by treating the commercial program in the same manner as the divided partial AV data of the main program, it is possible to send only the commercial program through another channel while reproducing it together with the main program at the time of reception.

Therefore, the AV data transmitting apparatus of the present invention transmits the first AV data, which is the main program to be broadcast,
Part A with a predetermined playback time from the beginning of the AV data
AV data dividing means for sequentially dividing into V data, AV data storing means for storing each divided partial AV data, and each of the stored partial AV data to a plurality of corresponding channels simultaneously, AV data output means for repeatedly outputting, and A output from the plurality of channels
And a transmission means for transmitting the V data as data of one program. The term “simultaneously” refers to a state in which the plurality of partial AV data are simultaneously output reproducibly from the beginning of each of a plurality of channels. Also, one partial AV data is repeatedly output to one channel.

[0009] Preferably, the AV data storage means has a second A of a reproduction time equal to the reproduction time of each partial AV data.
At least one V data is further stored, and the AV data output means, together with the first AV data, simultaneously outputs the second AV data to a predetermined channel together with each partial AV data of the first AV data. Output, each of the AV data output from a plurality of channels corresponding to each of the partial AV data and a channel for the second AV data is transmitted as one program data. To do. The number of the second AV data may be one or two or more with the predetermined reproduction time as a unit, and the number of output channels thereof may be one or two or more. For example, three types of second AV data may be combined as appropriate and output to two channels.

Specifically, the second AV data is a program such as a commercial program or a publicity program that is not directly related to the program to be broadcast mainly in a relatively short time. The AV data is configured by collecting a time corresponding to the reproduction time of the.

The AV data receiving apparatus of the present invention is a receiving apparatus for receiving the AV data transmitted by the AV data transmitting apparatus of the present invention as described above, and is operated by a receiver such as a remote controller. And a reproduction request signal input means for inputting a signal requesting selection / reproduction of a desired program, and a plurality of channels as data of the one program corresponding to the program selected by the input signal. Receiving means for receiving the respective AV data transmitted by the above, and at least partial AV data of at least the series of AV data of the plurality of received AV data before the division.
It has an AV data selecting means for sequentially selecting in the order of the V data for each of the predetermined reproduction times, and an AV data reproducing means for reproducing and outputting the selected AV data. In addition,
The reproduced and output AV data is displayed on a display device or the like so as to be visible to the recipient.

[0012] Preferably, the AV data selecting means first selects the second AV data from the received plurality of AV data, and selects the first partial AV of the first AV data.
When the data becomes reproducible from the beginning, the part A
The V data is selected, and thereafter, the partial AV data are sequentially selected at the predetermined reproduction time.

[0013] Preferably, the AV data reproducing means selects the program and inputs a signal for requesting reproduction to the reproduction request signal input means, that is, after the receiver requests viewing of the program, The waiting time until the reproduction of the first partial AV data of the AV data from the beginning to the reproduction is started is output to the display device.

Specifically, the AV data selecting means is
The AV data to be selected is sequentially switched based on the channel switching signal recorded in any of the plurality of AV data transmitted as the data of one program.

Further, specifically, the AV data receiving apparatus of the present invention further comprises a time measuring means capable of measuring the predetermined reproduction time of the transmitted AV data, and the AV data selecting means is the time measuring means. The AV data to be sequentially selected is switched at each of the predetermined reproduction times clocked by.

In the broadcasting system of the present invention, the data of an arbitrary program is transmitted by the AV data transmitting apparatus of the present invention described above, and the transmitted program data is desired by the AV data receiving apparatus of the present invention described above. The program data is received so that any program can be viewed almost immediately upon request.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a broadcasting system according to the present invention, which comprises a program data transmitting apparatus according to the present invention and a program data receiving apparatus according to the present invention, will be described. The broadcasting system of the present embodiment is a broadcasting system used in an NVOD system capable of almost instantly reproducing a desired program in response to a request from a receiver for viewing the desired program.

Program Data Transmission Device First, the configuration and operation of the program data transmission device of the present embodiment will be described with reference to FIGS. FIG.
It is a block diagram which shows the structure of the program data transmission apparatus 10 of this Embodiment. The program data transmitter 10 is a VTR1.
1, image encoder 12, distributor 13, n data storage units 14 _{-1 to} 14 _-n , n transmission encoders 15 _-1 to
15 _-n, and has n of the transmission unit 16 _-1 ~ 16 _-n.

First, the structure of each part will be described. VT
R11 is the program data transmission device 1 for transmitting the program data to be distributed.
It is a reproducing device for taking in 0. The program data distributed by the program data transmitting apparatus 10 is normally accumulated and stored in a state recorded on a VTR tape. Therefore, for the program data to be distributed, the VTR tape in which the program data is recorded in advance is reproduced by the VTR 11, the program data is read into the program data transmitting device 10, and preparation for distribution is made. VTR11 is V for that
It is a TR device. The program data reproduced by the VTR 11 is output to the image encoder 12. If the data distributed from the program data transmitting apparatus 10 as one program is composed of the main distribution target program data and other program data such as a commercial program, those source program data are recorded. The VTR tapes are sequentially reproduced on the VTR 11.

The image encoder 12 encodes and compresses the image data of the program data input from the VTR 11.
In the present embodiment, MPEG2 (Moving Picture)
It is compressed by the moving picture coding method by coding Experts Group). The compressed program data of the image data is sequentially output to the distributor 13.

The distributor 13 switches the program data input from the image encoder 12 at predetermined reproduction times and sequentially inputs the program data to the n data storage units 14 _-i (i = 1 to n). This distribution method is predetermined by the control unit (not shown) of the program data transmitting apparatus 10 in the following manner. First, the program data transmitting apparatus 10 delivers 1
The number of channels that can be used for data of one program is divided into a channel used for distribution of main program data and a channel used for distribution of commercial programs and the like. Then, the reproduction time of the main program is divided by the number of channels used for distributing the program to obtain the reproduction time of the program data stored in each data storage unit 14 _-i . The distributor 13 stores the program data input from the image encoder 12 at the first data storage unit 14 ₋₁ and the second data storage unit 14 at each reproduction time.
_-2 , ... are sequentially distributed.

If the reproduction time is not divisible, or if it is desired to distribute the reproduction time, it is possible to distribute the program data at a desired reproduction time longer than the required reproduction time, and to distribute the last program data. It is also possible to add dummy data (black data, commercial programs, public relations programs, etc.) after the, to make the time uniform. Also,
Since commercial programs and the like are usually created in advance in accordance with the reproduction time, which is the unit of distribution of the main program, there is no particular need to distribute them, and the data storage unit 14 _-i corresponding to the reserved channel can be used. Remember.

The first data storage unit 14 _-1 to the n-th data storage unit 14 _-n are n handled as data of one program.
It is provided corresponding to each channel, and stores the program data distributed and input by the distributor 13. In the present embodiment, the data storage unit 14- _i is composed of a hard magnetic disk device. In addition, the data storage unit 14
_The program data stored in _-i are repeatedly reproduced at the same timing, and the data storage unit 14 _-i (i = 1 to n)
Corresponding to the transmission encoder 15 _-i (i
= 1 to n), respectively. As described above, each data storage unit 14 _-i (i = 1 to n) stores, for example, program data for about 10 minutes, which is obtained by dividing one program data by the number of channels. Therefore, each data storage unit 14 _-i (i = 1 to n) does not need to be a particularly large-capacity storage device. In addition, each data storage unit 14 _-i (i = 1 to 1
In n), it is sufficient that the stored compressed program data is read out and output almost within the reproduction time thereof, and high speed access is not particularly required.

The first transmission encoder 15 _-1 to the n-th transmission encoder 15 _-n each have n data storage units 14.
_{-1 to} 14 _-n are provided corresponding to the data storage unit 14
_The program data input from _-i (i = 1 to n) is converted into a signal for transmission, and the signal is output to the transmission unit 16 _-i (i = 1 to n). Specifically, the transmission data is encoded for transmission,
Modulates for transmission.

The first transmitter 16 _-1 to the nth transmitter 16 _-n
Are respectively provided corresponding to _n transmission encoders 15 _-1 to 15 _-n , and transmission encoders 15 _-i (i = 1 to n)
Each of the transmission signals input from is transmitted at a predetermined frequency.

Next, the operation of the program data transmitting apparatus 10 will be described. First, the VTR tape recorded with the main program to be distributed by the NVOD system is
Play with R11. In the present embodiment, FIG.
It is assumed that the data of the program A with a reproduction time of 60 minutes having the configuration shown in (A) is distributed. The program data reproduced by the VTR 11 is encoded by the MPEG2 in the image encoder 12, compressed, and input to the distributor 13. The distributor 13 divides the data of the program A into data of a predetermined reproduction time and divides the data into the data storage units 14 _-i (i = 1 to 1).
Sequentially store in n). Figure 2 shows data of A shown (A), the divided into six data A1~A6 reproduction time every 10 minutes, each first data storage unit 14 _-1 to sixth data storage unit 14 _- Remembered in ₆ .

Next, the commercial program distributed with the program A is read. In the present embodiment, FIG.
It is assumed that commercial programs B and C as shown in (B) and FIG. 2 (C) are distributed together with the program A. In addition,
These commercial programs B and C are configured by connecting short commercial programs for a time corresponding to the reproduction time (10 minutes) of each data A1 to A6 obtained by dividing the program A. In the present embodiment, , 20 30-second commercial programs B1 to B20 and C1 to C20, respectively. These commercial programs are also recorded on the data storage unit 14 _-i (i = 1 to n) via the distributor 13 after being reproduced by the VTR 11 on the VTR tape on which they are recorded and compressed by the image encoder 12. To be done. The commercial program B is stored in the seventh data storage unit 14 _-7 , and the commercial program C is stored in the eighth data storage unit 14 _-8 .

First to eighth data storage units 14 _{-1 to} 14 _-8
The data stored in each of the first to eighth transmission encoders 15 _-1 are simultaneously read based on a control signal from a control unit of the program data transmission device 10 (not shown).
It is input to _15-8 and converted into a signal for transmission. Then, it is transmitted as data of channel 1 to channel 8 via the transmission units 16 _{-1 to} 16 _-n . Thereafter, the control unit outputs this control signal at a predetermined time interval corresponding to the reproduction time of each data, and the first to eighth data storage units 14 are outputted.
Repeating each data is read in _-1 to 14 _-8.
Then, the above process is repeated, and the same data is repeatedly output for each channel. The predetermined time interval is a time (10 minutes in the present embodiment) corresponding to the reproduction time of each data.

As a result, the program data transmitter 10 outputs the data as shown in FIG. 3 from each channel, and these data are collectively and selectably delivered as the data of one program. Then, the program data receiving device 20 according to the present invention, which will be described later, receives the distribution data, sequentially selects and reproduces the data of each channel, and thereby can almost immediately respond to the request generated at any time.
A D system is provided.

As described above, in the program data transmitting apparatus of the present embodiment, the NVOD system provides the data by storing a part of the data of the program provided on each channel and repeatedly outputting the data. it can.
Therefore, the storage capacity of the storage device per channel can be significantly reduced, and the device configuration can be simplified. Also, since it is not necessary to multiplex and read / write data using a storage device that can be accessed at high speed,
There is no need to perform complicated processing. Further, since only the commercial program needs to be output on another channel, the process of replacing the commercial program is easy and can be handled independently of the main program data.

Program Data Receiving Device Next, the configuration and operation of the program data receiving device of the present embodiment will be described with reference to FIGS. 4 and 5. FIG.
FIG. 3 is a block diagram showing the configuration of the program data receiving device 20. The program data receiving device 20 includes n receiving units 21 _-1.
Through 21 _-n, selector 22, the communication code decoder 23, memory unit 24, the image decoder 25, a timer 26 and a control unit 27
Having. A display device 30 and an operating unit 31 are connected to the program data receiving device 20, and a viewer operates the program data receiving device 20 with the operating unit 31 to display the program data displayed on the display device 30. View.

First, the structure of each part will be described. First
The receiving unit 21 _-1 to the n-th receiving unit 21 _-n are receiving units for receiving multi-channel broadcasting in which data of one program is broadcast via a plurality of preset channels. The signal transmitted at a predetermined frequency is received and output to the selector 22. The frequency of the signal received by each receiving unit 21 _-i (i = 1 to n) is controlled by the control unit 2 so that the frequency of the signal is a signal of a plurality of channels of the program selected by the viewer using the operation unit 31.
It is determined by the signal input from 7.

The selector 22 includes the first receiver 21 _-1 to the n-th receiver.
One of the signals output from the receiving section 21 _-1 is selected and output to the communication code decoder 23. Which receiver 2
The control unit 2 determines whether the signal from 1- _i (i = 1 to n) is selected.
Although it is determined by the control signal from 7, the signal from the predetermined receiving unit 21 _-i which is set in advance is selected,
After that, the signals from the remaining receiving units 21 _-i are sequentially selected in a predetermined order in synchronization with the switching signal generated at a predetermined time interval.

The communication code decoder 23 decodes the received signal input from the selector 22, restores it to compressed AV data, and outputs it to the storage unit 24.

The storage unit 24 is a buffer for temporarily storing the program data input from the communication code decoder 23. Data is sequentially input to the storage unit 24 in accordance with the data transmission speed, and the image decoder 25 sequentially reads the data in accordance with the decoding speed for sequentially reproducing the program in real time. The storage unit 24 is a buffer for absorbing a temporary difference between the data input speed and the output speed.

The image decoder 25 sequentially reads the program data stored in the storage section 24 and decodes the image data. In the program data transmitting apparatus 10 described above, the image data is compressed and transmitted by MPEG2, and therefore the image decoder 25 decompresses the image data compressed by MPEG2 and restores the original image data. The program data obtained by decoding the image data is output from the program data receiving device 20 and input to the display device 30.

The timer 26 measures the absolute time, detects the preset switching time of each channel, and inputs a signal indicating that the time has come to the control unit 27.

The control unit 27 controls the program data receiving device 20.
It controls each part that constitutes it and performs the desired operation as described above.
Let Specifically, for example, when the recipient operates the operation unit 31,
The desired program is received based on the input program selection signal.
The receiving unit 21 _-iFor each (i = 1 to n)
Set the reception conditions such as the reception frequency. Also, the control unit 2
Reference numeral 7 controls the signal selecting operation in the selector 22.
The reproduction of the program was requested by the operation unit 31 at an arbitrary time.
First, the control unit 27 first selects from among the signals of n channels,
The selector 22 is used to select a predetermined channel.
The selection signal is output to. Next, input from timer 26
The main program signal in synchronization with the program switching signal.
The received channels are sequentially selected. Other, control unit
27 is a communication code decoder 23, a storage unit 24, and
It controls the operation of the image decoder 25.

Next, the operation of the program data receiving apparatus 20 will be described. In the present embodiment, it is assumed that the program data is transmitted by the program data transmission device 10 described above. Specifically, as shown in FIG. 5, one 60-minute main program A is transmitted by 6 channels for each 10-minute program data, and two 10-minute commercial programs B and C are transmitted. It is assumed that the data is transmitted by two channels and the data as one program is transmitted by a total of eight channels. Then, the transmission conditions and the like of these programs are set in advance in the program data receiving device 20.
It is set in a storage unit (not shown). Also,
Based on the setting conditions, the timer 26 synchronizes with the repetition time of each program data, that is, 0 minutes, 10 minutes,
A signal indicating repetition of program data is output at intervals of 20 minutes, ..., And 10 minutes.

In this state, first, an arbitrary time t1
When the viewer inputs a signal requesting viewing of a desired program via the operation unit 31, the control unit 27 causes the receiving unit to receive the preset transmission signal corresponding to the program. 21- _i (i = 1 to n) is instructed to receive the signal. As a result, the number of receiving units 21 corresponding to the number of signal transmission channels of the requested program start receiving each of the transmission signals. That is, the signals of channel 1 to channel 8 are received by the first receiving unit 21 _-1 to the eighth receiving unit 21 _-8 .

Then, the channel 7 to which the first commercial program B is transmitted is selected by the selector 22 and converted into program data reproducible by the communication code decoder 23 to the image decoder 25 and then displayed on the display device 30. Output to. As a result, when the viewer requests to view the program, the commercial will start to be displayed on the display device 30. At this time, based on the time signal from the timer 26, the remaining time of the commercial, in other words, the program A
The display device 30 displays the waiting time until the start of the playback of the above, overlapping the commercial.

Next, at time t2, when a signal indicating repetition of program data is input from the timer 26 to the control unit 27, the control unit 27 sends the first program data A1 of the main program A to the selector 22. To select the signal of the selected channel. As a result, the selector 22 selects the signal received by the first receiver 21 _-1 . The selected signal is converted into reproducible AV data by the communication code decoder 23 to the image decoder 25 and output to the display device 30. This allows the viewer to start viewing the requested desired program (that is, the main program A). The time t2 is within 10 minutes from the time t1. That is, the maximum time for playing the commercial program is 10 minutes.

Similarly, every time a signal indicating the repetition of program data is input from the timer 26 to the control unit 27,
The control unit 27 instructs the selector 22 to sequentially select the program data A1, A2, A3 next to the main program A.
As a result, the selector 22 causes the second to sixth receivers 21 _-2 to _21- .
At _21-6 , the received signals are sequentially selected. The selected signals are sequentially reproduced on the display device 30.

When the reproduction of the main program A is completed, the channel 22 to which the second commercial program C is finally transmitted is selected by the selector 22 and reproduced. If the viewer does not finish the viewing, the channel 7 is selected again, and the once reproduced channel is repeatedly selected and reproduced.

As described above, in the program data receiving apparatus 20 of the present embodiment, in response to the request, the channel of the commercial program (channel 7 in the example of FIG. 5) is first selected and the predetermined signal is selected based on the switching signal. In order (channel 1
It is sufficient to switch the channels (in the order of channel 6). That is, a simple channel switching method can respond to a request generated at any time almost immediately. Therefore, the control device can be simplified.
Further, since the remaining waiting time can be displayed in the waiting time, it is easy for the viewer to wait even in the NVOD system that requires a certain waiting time. You can prevent it from happening.

Modifications The AV data transmitting apparatus of the present invention is not limited to this embodiment, and various modifications can be made. For example, in the present embodiment, the VTR 11 reproduces the VTR tape on which the program data to be distributed is recorded and reads the program data into the program data transmitting apparatus 10. However, the program data may be reproduced from another recording medium, or the program data may be directly supplied from, for example, a large-capacity video library. Further, the program data may be supplied via a communication line or the like.

The method of encoding image data in the image encoder 12 is not limited to MPEG2, and any method may be used. Further, when compressed program data is supplied to the program data transmission device 10, the image encoder 12 may be substantially omitted.

Further, the program data transmitter 1 shown in FIG.
0, the first transmitter 16 _-1 to the nth transmitter 16 _-n
The data transmission in is done by a completely independent system. However, these n pieces of transmission data may be multiplexed and transmitted, and the signal form in actual transmission may be arbitrary. Also, the configuration of the receiving unit 21 of the program data receiving apparatus 20 may be arbitrarily changed according to the transmission signal.

The channel configuration of the broadcast program used in the program data transmitting apparatus 10 and the program data receiving apparatus 20 of this embodiment is not limited to the configurations shown in FIGS. 2, 3 and 5. For example, a main program may be transmitted as multi-channel data of one program without including commercial programs. In that case, immediately after the viewer requests the program, a predetermined message is output, or a predetermined image recorded in the program data receiving device 20 is output in advance, and the main program starts from the beginning. You may wait until it becomes possible to reproduce. In that case, the method of displaying the remaining waiting time described in the present embodiment becomes more effective.

Further, although the commercial program is not included in the multi-channels transmitted as the data of one program, only the commercial program may be transmitted by another transmission channel. Then, the program data receiving apparatus 20 receives both the data of the main program selected by the viewer and the channel of the commercial program appropriately selected according to a predetermined rule, and the same method and order as those of the present embodiment. You may make it reproduce | regenerate. By doing so, a desired commercial program can be transmitted irrespective of the requested program data, the commercial program can be easily replaced, and the independence of the commercial program is further enhanced.

In the program data receiving apparatus 20 of the present invention, the commercial program C of channel 8 is selected and played after the main program A is played. For example, the first half of program A, that is, channel 1 is selected. ~ The programs A1 to A3 of channel 3 may be selected and reproduced after being reproduced. By doing so, the commercial program C can be reproduced without fail, and a broadcasting format closer to the current television broadcasting can be obtained.

[0052]

According to the AV data transmitting apparatus of the present invention,
Since it is possible to reduce the data storage capacity required for each channel when using it for the NVOD system,
It was possible to reduce the complicated processing and simplify the device configuration. In addition, commercial programs can be handled independently of the main programs, which facilitates their transmission. Further, according to the AV data receiving apparatus of the present invention, by regularly switching the channels, it is possible to respond to a request generated at an arbitrary time almost immediately, so that the apparatus configuration and processing can be simplified. Furthermore, a data receiving device that can easily display the remaining waiting time and is easy for the viewer to view was provided. Further, according to the broadcasting system of the present invention, such an AV data transmitting apparatus and an AV data receiving apparatus can simplify the configuration and can appropriately insert a commercial program or the like, which makes it easy for the viewer to view. It was As a result, a suitable broadcasting system could be provided for the NVOD system.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a program data transmission device according to an embodiment of the present invention.

FIG. 2 is a diagram showing data of a program to be broadcast,
(A) is a diagram showing data of a main broadcasting program,
(B) is a diagram showing data of the first commercial program,
(C) is a figure which shows the data of a 2nd commercial program.

FIG. 3 is a diagram showing a state in which data of the program shown in FIG. 2 is broadcast from a plurality of channels, and (A) to (H) are diagrams showing program data transmitted to channels 1 to 8 respectively. Is.

FIG. 4 is a block diagram showing a configuration of a program data receiving apparatus according to an embodiment of the present invention.

FIG. 5 is a diagram showing a state in which the program data receiving apparatus shown in FIG. 4 appropriately receives and switches the program data transmitted on channels 1 to 8;

[Explanation of symbols]

10 ... Program data transmitter 11 ... VTR 12 ... Image encoder 13 ... Distributor 14 ... Data storage unit 15 ... Transmission encoder 16 ... Transmitter 20 ... Program data receiver 21 ... Receiving unit 22 ... Selector 23 ... Communication code decoder 24 ... Storage unit 25 ... Image decoder 26 ... Timer 27 ... Control unit 30 ... Display device 31 ... Operation unit

Claims (9)

[Claims] 1. An AV data dividing means for dividing first AV data containing at least video data into a plurality of partial AV data each having a predetermined reproduction time, and AV data for storing each of the divided partial AV data. Storage means, AV data output means for repeatedly outputting the stored partial AV data to a plurality of corresponding channels simultaneously, and AV data output from the plurality of channels into one program data An AV data transmitting apparatus having a transmitting means for transmitting as. 2. The AV data storage means is provided for each of the parts A.
At least one second AV data having a reproduction time equal to the reproduction time of the V data is further stored, and the AV data output means simultaneously outputs the second AV data to at least one channel together with the partial AV data. Output repeatedly, and the transmitting means transmits each AV data output from a plurality of channels corresponding to the respective partial AV data and a channel corresponding to the second AV data as data of one program. The AV data transmitting apparatus according to claim 1. 3. The AV data transmitting apparatus according to claim 2, wherein the second AV data is AV data of independent short-time programs including commercial programs. 4. A series of AV data is divided into a plurality of partial AV data for each predetermined reproduction time, and the plurality of partial AV data is divided.
In a broadcasting system in which data is repeatedly output simultaneously through respective corresponding channels, and AV data including at least the output AV data is transmitted as data of one program, AV data for receiving the data of the program A receiving device, which is a reproduction request signal input unit to which a signal requesting selection and reproduction of a desired program is input, and which corresponds to the program selected by the input signal,
Receiving means for receiving each AV data transmitted via a plurality of channels as data of the one program, and partial AV data of at least the series of AV data of the plurality of received AV data before the division. A is sequentially selected at the predetermined reproduction time in the order of each AV data.
An AV data receiving device having V data selecting means and AV data reproducing means for reproducing the selected AV data. 5. The AV data transmitted as the data of the one program is the first AV which is the series of AV data.
A second composed of the plurality of partial AV data for the data and independent short-term programs including commercial programs
The AV data selecting means first selects the second AV data from the plurality of received AV data, and outputs the first AV data.
The first partial AV data of the first AV data is selected from the time when the first partial AV data of the first AV data becomes reproducible from the beginning, and thereafter, each partial AV data of the first AV data is selected at each predetermined reproduction time. The AV data receiving apparatus according to claim 4, wherein the AV data before division is sequentially selected in the order of the AV data. 6. The AV data reproducing means receives the first signal of the AV data selected by the AV data selecting means after a signal requesting selection and reproduction of the program is inputted to the reproduction request signal input means. The AV data receiving apparatus according to claim 4 or 5, wherein the period from the beginning of the partial AV data to the time when it becomes reproducible, and the remaining time of the period is output. 7. The AV data selecting means, based on a channel switching signal recorded in any of a plurality of AV data transmitted as data of the one program,
7. The AV data receiving device according to claim 4, wherein the AV data is sequentially selected. 8. The timepiece means is further capable of measuring the predetermined reproduction time of the transmitted AV data, and the AV data selecting means is provided with each of the predetermined reproduction times measured by the timekeeping means. 7. The AV data receiving device according to claim 4, wherein the AV data is sequentially selected. 9. The first AV data, which is a main program to be broadcast, is divided into a plurality of partial AV data with a predetermined reproduction time, and repeatedly output to a plurality of corresponding channels at the same time. A second A composed of independent programs each having the same playback time as that of commercial programs
V data is repeatedly output to one or more predetermined channels simultaneously with the partial AV data, and the first AV data and the second AV data can be collectively selected.
A transmitting device for transmitting the data as one program, and receiving the collectively transmitted data of the desired program based on an input selected reproduction signal of the desired program, and repeatedly transmitting the first data. Each part A of AV data
The second AV data is reproduced and output until the V data becomes reproducible from the beginning, and each partial AV data is reproduced from the beginning when each partial AV data of the first AV data becomes reproducible. A broadcasting system that has a receiving device that sequentially reproduces data in the order of the original AV data at each of the predetermined reproduction times, and distributes arbitrary AV data so that it can be viewed almost immediately upon request.