JPH1118066A - Video data transmitting method and video data reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the latitude of program constitution by describing the information of only the program of video data in a skip scanning system on a network information table showing a channel under transmission, multiplexing and transmitting a packet composed of that network information table and the video data of respective programs. SOLUTION: A multiplexing part 24 multiplexes video data 23 in the reproducing system of a sequential scanning system and video data 22 with the reproducing system of the skip scanning system as the video data of plural programs, and a transmitting part 25 transmits these multiplexed video data. At the same time, skip scan program information 26 is transmitted, while containing a program allocation table showing the packet for the transmission of programs and the network information table showing the channel for the transmission of the program of the skip scanning system. Therefore, both the video data 22 and 23 of the skip scanning system and the sequential scanning system can be transmitted so as to be properly reproduced on the side of reproduction, and the degrees of freedom can be improved for the constitution of programs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video data transmitting method and a video data reproducing apparatus for identifying and reproducing data of different reproducing systems in a video receiving system.

[0002]

2. Description of the Related Art In recent years, MPEG (Moving Picture E
Video data playback apparatuses conforming to the standards of the Xperts Group) are known from the latest MPEG textbooks, practical MPEG textbooks (ASCII publisher), and the like.

There are two types of moving image scanning methods: a progressive scanning method (non-interlace) and an interlaced scanning method (interlace).

In the progressive scanning method, all the scanning lines are sequentially scanned from the top for each frame to display an image, and the interlaced scanning is a method of scanning every other scanning line. In this interlaced scanning, when a certain frame is scanned by an odd line, in the next frame, an even line is scanned.

Conventionally, interlaced scanning has been the mainstream in television broadcasting. Recently, however, attention has been paid to progressive scanning, which has little flicker on the screen and has good affinity with CG (computer graphics). It has become. Therefore, in the future, it is expected that the demand for an image reproducing apparatus capable of reproducing both the interlaced scanning method and the progressive scanning method will increase.

[0006] In addition, there is a strong demand from the market to broadcast high-resolution video year by year, and in order to meet the need, video data with a high transfer rate is transmitted, and the high transfer rate is transmitted on the receiving side. Video data reproducing apparatuses having a high ability to decode the video data have been actively developed.

FIG. 21 is a diagram showing a configuration of data to be transmitted in the video data transmission method of the first conventional example. As shown in FIG. 21, video data of program numbers 1 and 3 and their service information NIT (network information table) and PM are stored in a band centered on a reception frequency of 12.568 GHz.
T (program allocation table) is multiplexed in packet units.
The data structure of these packets and the standards for their multiplexing are defined in detail in MPEG. Therefore,
Here, only the particularly relevant parts will be described.

[0008] 11 is a program number 1 (channel 1)
Is a video data packet of the interlaced scanning method. By defining the first packet identifier PID as 0x91,
This packet can be recognized as a packet of the video data of program number 1.

Reference numeral 15 denotes a program number 3 (channel 3)
Is a video data packet of the interlaced scanning method. By defining the first packet identifier PID as 0x93,
This packet can be recognized as a packet of the video data of program number 3.

Reference numeral 16 denotes a packet of a network information table (NIT). The frequency at which the video data of the program numbers 1 and 3 is transmitted is defined in the NIT. This example shows that video data of program numbers 1 and 3 are multiplexed in the band of 12.568 GHz.

Reference numeral 14 denotes a PMT (program allocation table) packet. This example shows that the packet having the packet identifier of the video data of program number 1 is included in the packet of 0x91 and the packet identifier of the video data of program number 3 is included in the packet of 0x93.

FIGS. 22 and 23 are block diagrams of a first conventional video data apparatus. 22 and 23,
100 is a transmitting side, and 200 is a receiving side (video data reproducing device). Reference numeral 24 denotes interlaced scanning video data 22
Multiplexing unit for multiplexing with the interlaced scan program information 26, 2
5 is the skipped video data 22 multiplexed by the multiplexing unit 24
Is a transmission unit that transmits information including Reference numeral 1 denotes a receiving unit that receives interlaced scanning video data 22 and the like multiplexed and transmitted from the transmitting side 100 for program broadcasting,
The video data of program number 1 and the video data of program number 3, NIT and PMT shown in FIG. 21 are received. Reference numeral 2 denotes an interlaced scanning image separation unit which separates information received by the receiving unit 1 including at least the interlaced scanning image data.

Reference numeral 4 denotes an interlaced scanning video channel selection unit which receives a program selection operation by a viewer and receives the selected program.
And an instruction to the interlaced scanning image separation unit 2.
Examples of the interlaced scanning video channel selection unit 4 include a remote control for selecting a television program, a channel button of a television, and a selection with a mouse of a personal computer, which are widely used.

Reference numeral 8 denotes an interlaced scanning video decoding unit which decodes the interlaced scanning video data separated by the interlaced scanning video separating unit 2 and outputs it to the interlaced scanning video display unit 9 as a video signal. A normal video data reproducing apparatus requires various other components (for example, a luminance adjustment circuit) in addition to the above components. However, since these components are not directly related to the present invention, they are omitted for simplicity of description. doing.

Next, a description will be given of the video data transmission method of the first conventional example and the operation of the conventional video data reproducing apparatus.

First, on the transmitting side 100, interlaced scanning video data of program number 1, interlaced scanning video data of program number 3, and NI as service information.
The multiplexing unit 24 multiplexes T and PMT as packets each having a predetermined bit length, as shown in FIG.

On the other hand, the receiving side (video data reproducing device) 20
At 0, video data is reproduced in the following procedure. (1) When the interlaced scanning video tuner 4 receives a program selection operation by the operator, the interrogator selects the receiving program to the receiver 1. (2) The receiving unit 1 receives a signal of any of the reception frequencies. The same content of N is applied to the transmission signal of any reception frequency.
Since the IT is multiplexed and transmitted, the receiving unit 1 recognizes from the content described in the NIT which signal of the reception frequency the video data of the designated program number is transmitted, and receives the reception frequency. Make a selection.

[0018] In the Perfect TV, where the main broadcast has recently started, the NIT including the packet is always transmitted, and the receiving side checks the information of the NIT to select a program. Therefore, a program in which program information is not registered in the NIT cannot be reproduced on the receiving side even if video data of the program is transmitted. (3) The interlaced scanning video separating section 2 separates the video data from the information received by the receiving section 1 based on the instruction of the interlaced scanning video selecting section 4. Specifically, if it is specified to reproduce the data of the program number 1, the value of the packet identifier 0x91 of the video data of the program number 1 is obtained from the value of the PMT, and the packet identifier 0x91 is obtained.
, And this packet can be transmitted to the subsequent stage. If it is specified to reproduce the data of the program number 3, the value of the packet identifier 0x93 of the video data of the program number 3 is obtained from the value of the PMT, and the packet of the packet identifier 0x93 is extracted. Tell to the next stage. (4) The interlaced scanning video decoding unit 8 decodes the video data separated by the interlaced scanning video separating unit 2 by the interlaced scanning method and outputs it as a video signal, and the interlaced scanning video display unit 9 performs the interlaced scanning decoding. An image corresponding to the input signal is displayed on a screen by using the signal output from the unit 8 as an input. (5) Now, assuming that the video data of the progressive scanning is multiplexed and transmitted, and the decoding is performed by the interlaced video decoding unit 8, the interlaced video decoding unit 8
Since the progressive scan video data cannot be correctly decoded, an abnormal video is output, which gives an uncomfortable feeling to the operator.

Next, a second conventional video data transmission method and video data reproducing apparatus will be described.

FIG. 24 is a configuration diagram of transmission data in the video data transmission method of the second conventional example. 24, the same reference numerals as those in FIG. 21 denote the same or corresponding parts. The difference from FIG. 21 is that the interlaced scan video data 11 and 1
5 in that video data obtained by encoding a video signal of N frames / second (N: a positive integer) is used.

FIGS. 25 and 26 are block diagrams of a second conventional video data apparatus. 25 and 26,
22 and 23 indicate the same or corresponding parts.
The difference from FIGS. 22 and 23 is that, instead of the interlaced scan video data 22, first video data 32 obtained by encoding an N frame / second video signal is multiplexed and transmitted, and the interlaced scan video decoder 8 is used. Has the ability to decode video data obtained by encoding a video signal of N frames / sec or less instead of
Is that the video decoding unit 48 of FIG.

Currently, the widely used MPEG MP @ ML
In the standard, video data obtained by encoding a video signal of 30 frames / sec or less may be decoded. That is, the sending side 1
At 00, the video signal of 30 frames / sec or less is multiplexed, and the first video decoding unit 48 of the video data reproducing device on the receiving side 200 normally decodes the video data obtained by encoding the video signal of 30 frames / sec or less. Must be decrypted.
In other words, if the transmitting side 100 receives 30 frames /
When a video signal exceeding 2 seconds is sent, the first video decoding unit 48 does not correctly decode video data obtained by encoding the video signal.

Now, for example, when video data obtained by encoding a video signal of 60 frames / sec is multiplexed and transmitted, and the video data reproducing apparatus receives this and decodes the video data, the video data is Because the playback capability of the video decoding unit of the device exceeds 30 frames per second,
An incorrect video cannot be decoded and an abnormal video is output, giving the operator discomfort or the like.

[0024]

However, in the conventional video data transmitting method, as described above, only one of the interlaced video data and the progressive scanning video data is multiplexed and transmitted to the transmission signal. Therefore, there is a problem that the degree of freedom of the television broadcast program configuration is limited.

Further, the conventional video data reproducing apparatus has only the interlaced scanning decoding section for decoding the interlaced scanning video data as in the above-described first example of the prior art. However, there is a problem in that a program of a scanning method different from the above cannot be reproduced correctly, giving an uncomfortable feeling to the operator.

Further, the conventional video data reproducing apparatus correctly reproduces a video when decoding a video signal having a transfer rate exceeding the reproducing capability of its own video decoding unit as in the second conventional example described above. There was a problem that it was not possible to give an uncomfortable feeling to the operator.

The present invention has been made in consideration of such a problem in the conventional video data reproduction, and enables the receiving side to correctly reproduce both the video data of the interlaced scanning system and the video data of the progressive scanning system. To provide a video data transmission method capable of transmitting video data obtained by encoding video signals having a high transfer rate, thereby improving the degree of freedom of program configuration. It is the purpose.

The present invention is also directed to a method for receiving a signal transmitted by a video data transmission method in which both video data of an interlaced scanning system and video data of a progressive scanning system are transmitted. In addition to video data, it is also possible to correctly reproduce and display progressive scan video data, or to receive video data transmitted by a video data transmission method that also transmits encoded high transfer rate video signals. It is another object of the present invention to provide a video data reproducing apparatus capable of correctly reproducing and displaying video data obtained by encoding a video signal having a high transfer rate.

[0029]

According to the first aspect of the present invention, video data of a program whose reproduction method is a progressive scanning method and video data of a program whose reproduction method is an interlaced scanning method are divided into packet units. The information of only the program of the video data of the interlaced scanning method is described in the network information table indicating which channel the program is transmitted, and the packet of the network information table and the packet of the video data of each program are multiplexed. This is a video data transmission method of converting and transmitting.

According to a second aspect of the present invention, in addition to the above structure, the sequential video audio data accompanying the progressive scan video data and the interlaced video audio data accompanying the interlaced scan video data are separately transmitted. This is a video data transmission method in which the video data is divided into packets, and the video audio data packets are multiplexed and transmitted.

According to a third aspect of the present invention, the first video data obtained by encoding a video signal of N frames / sec (N: positive number) and the video signal of M frames / sec (M> N) are encoded. The second video data is divided into packet units, respectively.
Information of only the program of the first video data is described in a network information table indicating on which channel the program is transmitted, and a packet of the network information table program and a packet of video data of each program are multiplexed. This is a video data transmission method for transmitting video data.

According to a fourth aspect of the present invention, in addition to the above-described structure, the first audio data accompanying the first video data and the second audio data accompanying the second video data are divided into packet units. This is a video data transmission method in which packets of the video audio data are also multiplexed and transmitted.

According to a fifth aspect of the present invention, at least a program of a channel is described by describing information of only a program of video data of a progressive scanning system, video data of an interlaced scanning system, and video data of an interlaced scanning system. A receiving unit that receives data including a network information table indicating whether or not the program is transmitted, and separates the network information table from the received data, and when a program selected by the operator exists in the separated network information table, An interlaced scanning video separating unit for separating interlaced scanning video data from received data, an interlaced scanning video decoding unit for decoding the separated video data, and receiving data when an operator selects progressive scanning video data. A progressive scanning video separation unit that separates video data of progressive scanning from A video data reproducing apparatus having a sequential scanning video decoder for.

According to a sixth aspect of the present invention, in addition to the above configuration, the received data further includes audio data accompanying the progressive scan video data and the interlaced scan video data. The separation unit separates the interlaced scanning audio data from the received data when separating the interlaced scanning video data, and the progressive scanning video separation unit sequentially scans the received data when separating the progressive scanning video signal. Scanning audio data for separating the separated interlaced scanning audio data, and a progressive scanning audio decoding unit for decoding the separated progressive scanning audio data. It is a data reproducing device.

According to a seventh aspect of the present invention, at least first video data obtained by encoding a video signal of N frames / sec (N: positive number) and a video signal of M frames / sec (M> N) are encoded. A receiving unit that receives data including a network information table indicating on which channel the program is transmitted by describing information of only the program of the second video data and the first video data, A first video separation unit that separates a network information table from the received data and separates the first video data from the received data when a program selected by the operator exists in the separated network information table; A first video decoding unit that decodes the separated first video data, and a second video component that separates the second video data from the received data when the operator selects the second video data. And parts, which is a video data reproducing apparatus and a second video decoding unit for decoding the second video data that separated.

According to an eighth aspect of the present invention, in addition to the above configuration, the received data further includes audio data associated with the first video data and the second video data, respectively.
The first video separation unit separates the first audio data from the received data when separating the first video data, and the second video separation unit separates the second audio data from the received data. Separating the second audio data from the received data,
This is a video data reproducing device including a first audio decoding unit that decodes the separated first audio data and a second audio decoding unit that decodes the separated second audio data.

[0037]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing an embodiment. (Embodiment 1) FIG. 1 is a configuration diagram showing a video data transmission method according to Embodiment 1 of the present invention, and FIG. 2 is a configuration of a video data reproducing apparatus corresponding to the video data transmission method of FIG. FIG. 1 and 2, FIG.
2, the same reference numerals as those in FIG. 23 denote the same or corresponding parts.

The difference from the conventional example shown in FIGS. 22 and 23 is that the transmitting side 100 in FIG. 1 multiplexes not only the interlaced video data 22 but also the progressively scanned video data 23 and transmits them. And the video data reproducing apparatus (reception side) 200 shown in FIG.
And a progressive scanning video separating section 3 for separating progressive scanning video data based on an instruction from the progressive scanning video selecting section 5 and decoding the separated progressive scanning video data. The difference is that a decoding unit 7 and a progressive scanning video display unit 10 for displaying progressive scanning video are added.

FIG. 3 is a data configuration diagram showing a configuration of transmission data in the video data transmission method according to the first embodiment. The difference from the transmission data configuration in the conventional video data transmission method shown in FIG. 21 is that the progressive scan video data 12 is multiplexed instead of the interlaced scan video data 15 and the program of the progressive scan video data 12 is used. Is not included in the NIT network information table 13.

The operation of the video data transmitting method and the video data reproducing apparatus according to the first embodiment configured as described above will be described below.

FIG. 4 is a flowchart showing a procedure on the transmitting side in the video data transmitting method according to the first embodiment, and FIG. 5 is a flowchart showing a procedure on the receiving side similarly.

First, for the sake of simplicity, the program is limited to two programs: interlaced scanning program 1 and progressive scanning program 3, and it is assumed that these two programs are multiplexed in one frequency band. .

The following procedure is performed on the transmitting side. (1) Creating a packet of video data of program number 1 (step 1).

That is, 0x91 as the packet identifier PID
Is added to the beginning of the packet, and then interlaced video data is added to create a packet of a fixed size. That is, if the data exceeds a certain size, it is divided into a plurality of packets, and if the data is less than a certain size, blank data (usually 0) is inserted to make it a certain size.

Here, the PID is set to 0x91, but may be anything as long as it can be distinguished from other packets. (2) Creating a packet of video data of program number 3 (step 2).

That is, 0x93 as the packet identifier PID
Is added to the beginning of the packet, and thereafter, video data of the sequential scanning method is added to create a packet of a fixed size.

Here, the PID is set to 0x93, but may be anything as long as it can be distinguished from other packets. (3) PMT packet creation (step 3).

That is, 0x02 is set as the packet identifier PID.
Is assigned to the beginning of the packet, 0X91 is assigned to the PID of the interlaced scan video data of program number 1, and 0X93 is assigned to the PID of the progressive scan video data of program number 3.

For simplicity, the packet identifier PID of the PMT is set to 0x02. However, in the MPEG standard, this PID is defined in a PAT (program association table). (4) NIT packet creation (step 4).

That is, 0x10 is set as the packet identifier PID.
Is inserted at the beginning of the packet, and the program information (for example, the reception frequency 1
2.568GHz). It should be noted that information relating to the sequential scanning of the program number 3 is not inserted into this packet. (5) Multiplex and transmit (step 5).

That is, the above-mentioned packets are sized, multiplexed and transmitted. Usually adds error correction,
Although transmission is performed by performing QPSK modulation or QAM modulation, the details are omitted because they are not the focus of the present invention.

On the receiving side, the following procedure is performed. (6) The receiving unit 1 receives the multiplexed data transmitted from the transmitting side (Step 6). (7) Extract PMT (step 7).

That is, the interlaced scanning video separation unit 2 and the progressive scanning video separation unit 3 extract a PMT packet using the packet identifier 0x02 as a key. (8) By decoding the data of the PMT, the PID of the video data of the program number 1 is detected as 0x91, the PID of the video data of the program number 3 is detected as 0x93, and furthermore, NI is detected.
By decoding the data of T, the program information of program number 1 is registered in the program information storage unit 6 (step 8).

Here, the operator specifies the program number and obtains the PID value by decoding the PMT data. However, the operator may directly specify the PID value. (9) The operator selects the program of the video data of the progressive scanning method with the program number 3 (step 9). (10) The interlaced scanning video separation unit 2 searches for a program number registered in the program information storage unit 6, and if there is a program number that matches the program number selected by the operator, it corresponds to this program number. It is designed to extract packets of video data to be transmitted.

In this case, the operator has selected the program of the video data of the sequential scanning system of the program number 3, but since the program of the program number 3 is not registered in the program information storage section 6, Video data will not be extracted. Therefore, the interlaced-scan video decoder 8 does not send the video data of the progressive scanning method that cannot be correctly reproduced to the interlaced-scan video decoder 8, does not output an abnormal video, and finally the operator is dissatisfied. There is nothing (step 10). (11) The progressive scan video separating section 3 uses the information of the PID of the packet of the progressive scan video data of the program number 3 of 0x93 as a key and sequentially scans the PID of 0x93, regardless of the information in the program information storage section 6. The video data packet of the system is extracted and sent to the progressive scanning video decoding unit 7 (step 1).
1). (12) The progressive scan video decoding section 7 correctly decodes the progressive scan video data, and the progressive scan video display section 10 outputs a normal progressive scan video on the screen (step 12).

As described above, in the video data transmission method according to the first embodiment, video data composed of a plurality of programs is divided into packet units, and a plurality of packets of the video data and a packet containing information related to the program are divided into packets. In the multiplexed video data transmission method, video data 12 whose reproduction method is a progressive scanning method and video data 11 whose reproduction method is an interlaced scanning method are transmitted as video data of the plurality of programs. , A program allocation table 14 indicating which packet the program is transmitting
And the network information table 13 indicating on which channel the program of the interlaced scanning method is transmitted, so that both the image data of the interlaced scanning method and the image data of the progressive scanning method are used. It can be transmitted so that it can be played correctly on the receiving side,
The degree of freedom in the composition of the program can be improved.

In the video data reproducing apparatus according to the first embodiment, at least the progressively scanned video data 12,
A receiving unit 1 for receiving interlaced scan video data 11 and a network information table 13 indicating on which channel the interlaced scan video data is transmitted;
An interlaced scan video separation unit 2 for extracting interlaced video data and a network information table selected by the operator from the information input from the reception unit 1, and a sequential scan selected by the operator from the information input from the reception unit 1. And a program information storage unit 6 for storing a network information table separated and extracted by the interlaced scanning video separating unit 2 and an operator to select a program of interlaced scanning video data. If the program of the video data selected by the operator is registered in the information stored in the program information storage unit 6, the video data should be extracted to the interlaced scanning video separation unit 2. An interlaced scanning video tuner 4 for instructing video data, and accepting selection of progressive scanning video data by an operator, A progressive scan video selecting section 5 for instructing the scan video separating section 3 on video data to be extracted; and an interlaced scan video which decodes the interlaced scan video data separated and extracted by the interlaced scan video separating section 2 and outputs it as a video signal. Since the decoding unit 8 and the progressive scanning video decoding unit 7 that decodes the progressive scanning video data separated and extracted by the progressive scanning video separating unit 3 and outputs the decoded video signal as a video signal, the video data A video data reproducing apparatus capable of correctly reproducing and displaying both video data of the scanning method can be realized. (Embodiment 2) FIG. 6 is a configuration diagram showing a video data transmission method according to Embodiment 2 of the present invention, and FIG. 7 is a configuration of a video data reproducing apparatus corresponding to the video data transmission method of FIG. FIG. 6 and 7, FIG.
5, the same reference numerals as those in FIG. 26 denote the same or corresponding parts.

The difference from the conventional example shown in FIGS. 25 and 26 is that the transmitting side in FIG.
A point where not only the first video data 32 obtained by encoding the video signal of frame / second but also the second video data 33 obtained by encoding the video signal of M frame / second (M> N) are multiplexed and transmitted. , And the video data reproducing apparatus of FIG. 7 (receiving side)
200, a second video selection unit 45 is newly added, and based on an instruction from the second video selection unit 45, the second video data obtained by encoding the M frame / second video signal is separated. A second video separation unit 43 is added, and the separated M
A second video decoding unit 47 for decoding video data of frames / second, and a second video decoding unit 47 for displaying video signals of M frames / second.
Is that the video display unit 50 of FIG.

FIG. 8 is a data configuration diagram showing a configuration of transmission data in the video data transmission method according to the second embodiment. The difference from the transmission data configuration in the conventional video data transmission method shown in FIG. 24 is that the M frame / second video data 18 is multiplexed instead of the N frame / second video data 19, and the M frame / second Is that the information on the program of the video data is not included in the NIT network information table 13.

The operation of the video data transmitting method and the video data reproducing apparatus according to the second embodiment configured as described above will be described below.

FIG. 9 is a flowchart showing a procedure on the transmitting side in the video data transmitting method according to the second embodiment, and FIG. 10 is a flowchart showing a procedure on the receiving side similarly.

First, for simplicity, N = 30 and M = 6
0, that is, the program is a program 1 of video data of 30 frames / second and a program 3 of video data of 60 frames / second.
And the first video decoding unit 48 of the video data reproducing apparatus 200 has a capability of correctly decoding a video data signal of 30 frames / second, and the second video decoding unit 47 Assume that it has the ability to correctly decode a frame / second video data signal.

Since the processing in the second embodiment is very similar to the processing flow described in the first embodiment, only the parts unique to the second embodiment will be mainly described.

First, the transmitting side does not insert the information of the program number 3 into the NIT. Therefore, the first video separation unit 42 on the receiving side does not separate the 60 frame / second video data of the program number 3 that is not registered in the NIT. Therefore, the first video decoding unit 48 does not decode a video signal having a transfer rate exceeding the reproduction capability of the video decoding unit of the first video decoding unit 48, so that a problem such as a failure to correctly reproduce a video does not occur.

Further, the second video separating section 43 separates the video data of the program number 3 irrespective of the NIT information, and the second video decoding section 47 decodes the video data of 60 frames / sec. The second video display unit 50 displays normal video data.

As described above, in the video data transmitting method according to the second embodiment, video data composed of a plurality of programs is divided into packet units, and a plurality of packets of the video data and a packet containing information related to the program are divided into packets. In the video data transmission method of multiplexing and transmitting, as the video data of the plurality of programs, first video data 17 obtained by encoding a video signal of N frames / second (N: a positive number);
The second encoding of a video signal of M frames / sec (M> N)
And a program allocation table 14 indicating which packet the program is transmitting and a network information table 13 indicating which channel the program of the first video data is transmitted on. As a result, video data obtained by encoding a video signal having a high transfer rate can be transmitted so that it can be correctly reproduced on the receiving side, and the degree of freedom in program configuration can be improved.

In the video data reproducing apparatus according to the second embodiment, at least N frames / sec (N: positive number)
The first video data 17 obtained by encoding the video signal of the first, the second video data 18 obtained by encoding the video signal of M frames / sec (M> N), and the first video data are transmitted by any channel. Receiving unit 1 for receiving a network information table 13 indicating whether the network information table 13 is present, first video data 17 selected by an operator from information input from the receiving unit 1, and a first video separating unit for extracting the network information table 13 42,
Second video separation unit 4 for extracting second video data 18 selected by the operator from the information input from reception unit 1
3 and a program information storage unit 6 for storing the network information table 13 separated and extracted by the first video separation unit 42.
And the operator selects the program of the first video data 17. If the video data is stored in the program information storage unit 6, the program of the video data selected by the operator is registered. If there is, the first video separating unit 42 instructs the first video separating unit 42 to specify video data to be extracted.
A second video selection unit 45 that accepts selection of the second video data by the operator, and instructs the second video separation unit 43 on the video data to be extracted;
The first video decoding unit 48 that decodes the first video data 17 separated and extracted by the video separation unit 42 and outputs it as a video signal, and the second video separation unit 43
The second video decoder 47 decodes the extracted second video data 18 and outputs it as a video signal, so that video data encoded with a video signal of a high transfer rate can be correctly reproduced. In addition, it is possible to realize a video data reproducing device capable of displaying. (Embodiment 3) FIG. 11 is a block diagram showing a video data transmission method according to Embodiment 3 of the present invention, and FIG.
FIG. 12 is a diagram showing a configuration of a video data reproducing device corresponding to the video data transmission method of FIG. 11. 11 and 12, the same reference numerals as those in FIGS. 1 and 2 denote the same or corresponding parts.

The difference from the first embodiment shown in FIGS. 1 and 2 is that the transmission side 100 shown in FIG.
2. The point that the progressive scan audio data 61 accompanying the progressive scan video data is also multiplexed and transmitted, and the interlaced scan audio decoder 63 that decodes the interlaced scan audio data at the receiving side 200 in FIG. An interlaced scanning audio output unit 65 that outputs the decoded audio data,
The difference is that a progressive scanning audio decoding unit 64 for decoding the progressive scanning audio data and a progressive scanning audio output unit 66 for outputting the decoded audio data are added.

In this description, two types of audio data for interlaced scanning and audio data for progressive scanning are considered for the audio decoding unit and the audio output unit.
It may be composed of different types of audio decoding units and audio output units.

FIG. 13 is a data configuration diagram showing a configuration of transmission data in the video data transmission method according to the third embodiment. 13, the same reference numerals as those in FIG. 3 denote the same or corresponding parts. The difference from the first embodiment shown in FIG. 3 is that the interlaced scanning audio data 51 accompanying the interlaced scanning video data and the sequential inspection audio data 52 attached to the progressive scanning video data are added. The point is that 0x92 is registered as the PID of the audio data of the program number 1 and 0x94 as the PID of the audio data of the program number 3.

In this description, two types of audio data are considered: audio data associated with interlaced video data and audio data associated with progressively scanned video data.
If the interlaced video data and the audio data accompanying the progressively scanned video data are the same, the PID is 0x9.
It suffices if there is either a packet of 2 or a packet with PID of 0x94. For example, PID is 0x92 as audio data
Is created, and 0x92 is registered as the PID of the audio data of the program numbers 1 and 3 of the PMT. In this case, the interlaced scanning video separating section 2 or the progressive scanning video separating section 3 corresponds to the audio separating section described in claim 9, and the interlaced scanning audio decoding section 63 or the progressive scanning audio decoding section 64 is an audio decoding section. , But may be provided as separate units.

FIG. 14 is a flowchart showing a procedure on the transmitting side in the video data transmitting method according to the third embodiment, and FIG. 15 is a flowchart showing a procedure on the receiving side similarly. Embodiment 1 shown in FIGS. 4 and 5
Is different from the flowchart in that the transmitting side adds not only the video data packet but also the audio data packet, and registers the PID of the audio data packet in the PMT. The point is that processing for decoding audio data is added.

As described above, in the video data transmission method according to the third embodiment, the video data composed of a plurality of programs and the audio data accompanying the video data are each divided into packet units, and the video data and the audio data are divided. And a video data transmission method for multiplexing and transmitting a packet including information on a program, wherein the video data of the plurality of programs are video data 12 whose video reproduction method is a progressive scanning method, and The accompanying video data 52 for sequential video, the video data 11 whose reproduction method is the interlaced scanning system, and the audio data 51 for interlaced video accompanying this video data are transmitted, and which packet the program is transmitting is determined. Shown program allocation table 5
3 and the network information table 13 indicating on which channel the interlaced scanning program is transmitted, the interlaced scanning video data and accompanying audio data, and the progressive scanning video data are transmitted. All of the accompanying audio data can be transmitted so that it can be correctly reproduced on the receiving side, and the degree of freedom in the structure of the program can be improved.

In the video data reproducing apparatus according to the third embodiment, the receiving section 1 includes at least audio data, video data of progressive scanning, video data of interlaced scanning,
The network information table 13 indicating which channel the interlaced scanning video data is transmitted on is received. The interlaced scanning video separation unit 2 separates the audio data from the interlaced scanning video data 11 and the network information table 13. The progressive scanning video separating section 3 is configured to separate the audio data from the progressive scanning video data 12, and further includes an interlaced scanning audio decoding section 63 that decodes the audio data from the interlaced scanning video separating section 2. With the configuration including the progressive scanning audio decoding unit 64 for decoding the audio data from the progressive scanning video separation unit 3, in addition to the video data, the audio data accompanying the video data can be correctly reproduced. A video data reproducing device can be realized. (Embodiment 4) FIG. 16 is a block diagram showing a video data transmission method according to Embodiment 4 of the present invention, and FIG.
FIG. 17 is a diagram showing a configuration of a video data reproducing apparatus corresponding to the video data transmission method of FIG. 16 and 17, the same reference numerals as those in FIGS. 6 and 7 denote the same or corresponding parts.

The difference from the second embodiment shown in FIGS. 6 and 7 is that the transmitting side 100 shown in FIG. 16 has the first video data 22 coded with the video signal of N frames / sec. 1 and the second audio data 71 accompanying the second video data 23 obtained by encoding the M frame / second video signal are also multiplexed and transmitted. , A first audio decoding unit 67 for decoding the first audio data, a first audio output unit 69 for outputting the decoded audio data, a second audio decoding unit 68 for decoding the second audio data, The point is that a second audio output unit 70 for outputting the decoded audio data is added.

FIG. 18 is a data configuration diagram showing a configuration of transmission data in the video data transmission method according to the fourth embodiment. 18, the same reference numerals as those in FIG. 8 denote the same or corresponding parts. The difference from the second embodiment shown in FIG. 8 is that the first audio data 5 attached to the first video data
1. Second audio data 52 accompanying the second video data
0x92 as the PID of the audio data of program number 1 and the PI of the audio data of program number 3 in the PMT.
This is the point where 0x94 is registered as D.

FIG. 19 is a flowchart showing a procedure on the transmitting side in the video data transmitting method according to the fourth embodiment, and FIG. 20 is a flowchart showing a procedure on the receiving side similarly.

Embodiment 2 shown in FIGS. 9 and 10
Is different from the flowchart in that the transmitting side adds not only the video data packet but also the audio data packet and registers the PID of the audio data packet in the PMT.
The difference is that a process for decoding audio data accompanying video data is added on the receiving side.

As described above, in the video data transmitting method according to the fourth embodiment, the video data composed of a plurality of programs and the audio data accompanying the video data are each divided into packets, and the video data and the audio data are divided. And a packet including information about a program, and transmitting the multiplexed packet. In the video data transmission method, a video signal of N frames / second (N: a positive number) is encoded as video data of the plurality of programs. Video data 17, first audio data 51 accompanying the video data, second video data 18 obtained by encoding a video signal of M frames / sec (M> N), and the video data A packet that transmits the second audio data 52 and includes information about the program includes a program allocation table 53 indicating which packet the program transmits. And the network information table 13 indicating on which channel the program of the first video data is transmitted, the video data of N frames / second (N: a positive number) and the accompanying audio data, In addition, all video data and accompanying audio data of M frames / sec (M> N) can be transmitted so that they can be correctly reproduced on the receiving side, and the degree of freedom in program configuration can be improved.

In the video data reproducing apparatus according to the fourth embodiment, the receiving unit 1 transmits at least any of the audio data, the first video data, the second video data, and the first video data on any channel. Receiving the network information table 13 indicating whether or not the
Is configured to separate audio data, first video data, and a network information table, and the second video separation unit 43 is configured to separate audio data and second video data. Since the first audio decoding section 67 for decoding the audio data from the section 42 and the second audio decoding section 68 for decoding the audio data from the second video separation section 43 are provided, In addition, it is possible to realize a video data reproducing apparatus capable of correctly reproducing audio data accompanying these video data.

[0081]

As is apparent from the above description, the present invention transmits both video data of the interlaced scanning system and video data of the progressive scanning system so that they can be correctly reproduced on the receiving side. The video data transmission method or the video data transmission method that also transmits video data obtained by encoding a video signal with a high transfer rate has an advantage that the degree of freedom in program configuration can be improved.

The present invention is also directed to a method for receiving a signal transmitted by a video data transmission method in which both video data of an interlaced scanning system and video data of a progressive scanning system are transmitted, and A video data reproducing device that can correctly reproduce and display progressive scan video data in addition to video data, or a video data transmission method that transmits an encoded high transfer rate video signal. And a video data reproducing apparatus capable of correctly reproducing and displaying video data obtained by encoding a video signal having a high transfer rate.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a video data transmission method according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a video data reproducing apparatus corresponding to the video data transmission method according to the first embodiment of FIG. 1;

FIG. 3 is a diagram showing a configuration of transmission data in the video data transmission method according to the first embodiment.

FIG. 4 is a flowchart for explaining the operation of the video data transmission method according to the first embodiment.

FIG. 5 is a flowchart for explaining the operation of the video data reproducing device according to the first embodiment.

FIG. 6 is a diagram showing a configuration of a video data transmission method according to a second embodiment of the present invention.

FIG. 7 is a diagram showing a configuration of a video data reproducing apparatus corresponding to the video data transmission method according to the second embodiment of FIG. 6;

FIG. 8 is a diagram showing a configuration of transmission data in a video data transmission method according to the second embodiment.

FIG. 9 is a flowchart for explaining the operation of the video data transmission method according to the second embodiment.

FIG. 10 is a flowchart for explaining the operation of the video data reproducing apparatus according to the second embodiment.

FIG. 11 is a diagram showing a configuration of a video data transmission method according to a third embodiment of the present invention.

FIG. 12 is a diagram showing a configuration of a video data reproducing apparatus corresponding to the video data transmission method according to the third embodiment of FIG. 11;

FIG. 13 is a diagram showing a configuration of transmission data in a video data transmission method according to the third embodiment.

FIG. 14 is a flowchart for explaining the operation of the video data transmission method according to the third embodiment.

FIG. 15 is a flowchart for explaining the operation of the video data reproducing device according to the third embodiment.

FIG. 16 is a diagram showing a configuration of a video data transmission method according to a fourth embodiment of the present invention.

FIG. 17 is a diagram showing a configuration of a video data reproducing apparatus corresponding to the video data transmission method according to the fourth embodiment of FIG. 16;

FIG. 18 is a diagram showing a configuration of transmission data in a video data transmission method according to the fourth embodiment.

FIG. 19 is a flowchart for explaining the operation of the video data transmission method according to the fourth embodiment.

FIG. 20 is a flowchart for explaining the operation of the video data reproducing device according to the fourth embodiment.

FIG. 21 is a diagram illustrating a configuration of transmission data in a video data transmission method according to a first conventional example.

FIG. 22 is a diagram showing a configuration of a video data transmission method according to a first conventional example.

FIG. 23 is a diagram showing a configuration of a video data reproducing apparatus corresponding to the video data transmission method according to the first conventional example.

FIG. 24 is a diagram showing a configuration of transmission data in a video data transmission method according to a second conventional example.

FIG. 25 is a diagram showing a configuration of a video data transmission method according to a second conventional example.

FIG. 26 is a diagram showing a configuration of a video data reproducing apparatus corresponding to the video data transmission method according to the second conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Receiving part 2 Interlaced scanning video separation part 3 Sequential scanning video separation part 4 Interlaced scanning video tuning part 5 Progressive scanning video tuning part 6 Program information storage part 7 Sequential scanning video decoding part 8 Skip scanning video decoding part 9 Jump scanning video display part Reference Signs List 10 progressive scan video display section 13 NIT (network information table) 14 PMT (program allocation table) 16 NIT (network information table) 22 interlaced scan video data 23 progressive scan video data 24 multiplexing section 25 transmitting section 26 interlaced scan program information 32 1 video data 33 second video data 36 first video data program information 42 first video separation unit 43 second video separation unit 47 second video decoding unit 48 first video decoding unit 61 for sequential scanning Audio data 62 Interlaced scanning audio data 63 Interlaced scanning audio decoding unit 64 Sequential scanning audio Issue unit 71 second sound data 72 first audio data 100 transmitting side 200 receiving side

Claims (9)

[Claims] 1. The video data of a program whose playback system is a progressive scanning system and the video data of a program whose playback system is an interlaced scanning system are each divided into packet units, and only the program of the video data of the interlaced scanning system is divided. Video, characterized in that information is described in a network information table indicating on which channel the program is transmitted, and packets of the network information table and video data packets of each program are multiplexed and transmitted. Data transmission method. 2. The method according to claim 1, further comprising dividing the sequential video audio data accompanying the video data according to the progressive scanning method and the interlaced video audio data accompanying the video data using the interlaced scanning method into packet units. 2. The video data transmission method according to claim 1, wherein packets of video audio data are also multiplexed and transmitted. 3. First video data obtained by encoding a video signal of N frames / sec (N: positive number) and M frames / sec (M
> N), the second video data obtained by encoding the video signal is divided into packet units, and information on only the program of the first video data is indicated by a network indicating on which channel the program is transmitted. A video data transmission method described in an information table, wherein a packet of the network information table program and a packet of video data of each program are multiplexed and transmitted. 4. Further, the first audio data associated with the first video data and the second audio data associated with the second video data are respectively divided into packet units, and 4. The video data transmission method according to claim 3, wherein packets are multiplexed and transmitted. 5. At least by which channel a program is transmitted by describing information of only a program of video data of a progressive scanning system, video data of an interlaced scanning system, and video data of the interlaced scanning system. And a receiving unit that receives data including a network information table indicating the network information table. The receiving unit separates the network information table from the received data. If a program selected by an operator is present in the separated network information table, The interlaced scan video separating unit that separates the interlaced scan video data from the data, the interlaced scan video decoding unit that decodes the separated video data, and if the operator selects the progressive scan video data, A progressive scanning video separating section for separating the progressive scanning video data from received data; And a progressive scanning video decoding unit for decoding the decoded video signal. 6. The interlaced scanning video separation section further comprises: the interlaced scanning video separation section, wherein the interlaced scanning video separation section includes the interlaced scanning video separation section. When separating the video data of, the audio data for interlaced scanning is separated from the received data, the progressive scanning video separation unit,
When separating the video signal of the progressive scanning, to separate the audio data for progressive scanning from the received data,
6. The apparatus according to claim 5, further comprising: an interlaced scanning audio decoder for decoding the separated interlaced scanning audio data; and a progressive scanning audio decoder for decoding the separated progressive scanning audio data. Video data playback device. 7. At least first video data obtained by coding a video signal of N frames / second (N: a positive number), and second video data obtained by coding a video signal of M frames / second (M> N). A receiving unit that receives data including a network information table indicating on which channel the program is transmitted by describing data and information of only the program of the first video data; and Separating a network information table and, if a program selected by an operator is present in the separated network information table, separating the first video data from the received data;
And a first video decoding unit that decodes the separated first video data, and, if the operator selects the second video data, the second video data from the received data. And a second video decoding unit that decodes the separated second video data. 8. The reception data includes audio data accompanying the first video data and the second video data, respectively, and the first video separation unit includes the first video data and the second video data. When separating video data, the first audio data is separated from the received data, and the second video separation unit is configured to separate the second audio data from the received data when separating the second video data. A first audio decoding unit for decoding the separated first audio data, and a second audio decoding unit for decoding the separated second audio data 8. The video data reproducing apparatus according to claim 7, wherein: 9. The received data includes audio data common to each of the video data, and an audio separating unit that separates the audio data from the received data,
8. The video data reproducing apparatus according to claim 5, further comprising an audio decoding unit for decoding the separated audio data.