JP2003235008A - Image data processing apparatus and method, recording medium, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image data processing apparatus capable of performing consecutive reproduction in the case of dividing a MPEG-TS (transport stream) and recording the divisions. <P>SOLUTION: A private packet generation detection section 204 generates a private packet and attaches it to the head of the MPEG-TS. A CPU sets a division position at a border of MPEG-TS packets, defines the MPEG-TS until the packet at the division position to be the MPEG-TS before division and the MPEG-TS after that to be the MPEG-TS after division. The private packet generation detection section 204 generates the private packet and attaches it to the head of the MPEG-TS after division. Further, the private packet generation detection section 204 updates the private packet after the division. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image data processing device and method, a recording medium, and a program, and more particularly, when an MPEG-TS is divided and recorded.
The present invention relates to an image data processing device and method capable of continuous reproduction, a recording medium, and a program.

[0002]

2. Description of the Related Art In CS (Communication Satellite) digital broadcasting or BS (Broadcasting Satellite) digital broadcasting, video data and audio data are recorded in MPEG (Moving Picture Experts Group).
It is compressed by the method and transmitted as MPEG-TS (transport stream).

In MPEG-TS, video data, audio data, and other information are divided into transport stream packets (hereinafter referred to as TS packets) having a fixed length of 188 bytes (bytes) and transmitted.

FIG. 1 is a block diagram showing the configuration of a conventional hard disk recorder for recording and reproducing CS digital broadcasting or BS digital broadcasting. The television receiver 2 receives the MPEG-TS via the antenna 1,
Transfer to the hard disk recorder 3.

The hard disk recorder 3 receives the received M
It records on the hard disk which incorporates PEG-TS. In addition, the hard disk recorder 3 uses the recorded MPEG-
The TS is reproduced, decoded, output to the television receiver 2, and displayed.

[0006]

By the way, if the length of one file is limited, the MPEG-
It is necessary to divide the TS in the middle and record it as two or more files. Conventionally, such division has been performed at an arbitrary packet position as shown in FIG.

In MPEG-TS, about every 100 msec,
Packet ID of PMT (Program Map Table) packet
PAT (Program Associati) in which (PID) is recorded
on Table) packet is inserted, and the packet IDs of the video packet and the audio packet are recorded in the PMT. The PAT packet is also inserted about every 100 msec.

Therefore, when decoding MPEG-TS, the PMT packet ID is detected from the PAT, and the PM
The packet IDs of the video packet and the audio packet are detected from T. Then, based on the video packet ID and the audio packet, the video packet and the audio packet are extracted from the MPEG-TS and decoded.

As a result, in the case of the example of FIG. 2, since only the PMT packet after the PAT packet can be detected, the PAT of the divided MPEG-TS shown on the right side of the figure is detected.
The range up to the PMT packet after the packet cannot be decoded.

Further, decoding is performed by GOP (Group Of Pict).
Since it is performed in units of (ure), there is a problem that decoding cannot be performed until a sequence header arranged at the head of each GOP is detected.

As a result, there is a problem that the MPEG-TS divided and recorded on the hard disk cannot be continuously reproduced.

The present invention has been made in view of such a situation, and makes it possible to perform continuous reproduction when an MPEG-TS is divided and recorded.

[0013]

An image data processing apparatus according to the present invention comprises an input means for inputting image data, and a first adding means for adding an additional packet to the head of the image data input by the input means. The image data includes a dividing unit that divides the image data into first image data and second image data, and a second adding unit that adds an additional packet to the head of the second image data that is divided by the dividing unit. It is characterized by

It is possible to further include changing means for changing the content of the additional packet at the head of the first image data.

The additional packet may include address information necessary for accessing the beginning of the divided image data.

The image data may be MPEG-TS and the additional packet may be a private packet.

Recording means for recording the first image data and the second image data on a recording medium may be further included.

First detecting means for detecting a second packet including the ID of the first packet including the IDs of the video packet and the audio packet from the image data to which the additional packet is added by the first adding means, Second detecting means for detecting the first packet from the image data based on the second packet detected by the first detecting means;
From the image data based on the detection result of the third detection means for detecting the header located at the beginning of the compression unit of the image data from the image data based on the detection result of the second detection means, and the detection result of the third detection means. Fourth to detect a predetermined frame
Can be further included.

The first packet may be a packet containing PMT, the second packet may be a packet containing PAT, and the header may be a sequence header.

The dividing means may be configured such that the end portion of the first image data is composed of a part of pictures in one group of pictures.

The dividing means may be configured so that some pictures in one group of pictures are composed of one I picture, one P picture, and four B pictures.

It is possible to further include third adding means for adding an overlapping portion overlapping the end portion of the first image data to the head of the second image data.

Recording means for recording the first image data and the second image data on a recording medium, reproducing means for reproducing the image data recorded on the recording medium, and second recording data after the first image data. When reproducing the image data, it is possible to further include a removing unit that removes an overlapping portion added to the head of the second image data.

The image data processing method of the present invention comprises an input control step for controlling input of image data, and a first addition step for adding an additional packet to the head of the image data whose input is controlled by the processing of the input control step. And a dividing step of dividing the image data into first image data and second image data, and a second addition of adding an additional packet to the head of the second image data divided by the processing of the dividing step. And a step.

The program recorded on the recording medium of the present invention includes an input control step for controlling the input of image data, and an additional packet for adding an additional packet to the beginning of the image data whose input is controlled by the processing of the input control step. 1 addition step, a division step of dividing the image data into first image data and second image data, and an addition packet is added to the beginning of the second image data divided by the processing of the division step. And a second addition step.

The program of the present invention includes an input control step for controlling input of image data, a first addition step for adding an additional packet to the beginning of the image data whose input is controlled by the processing of the input control step, and an image. Data
The computer executes a dividing step of dividing the image data into first image data and second image data, and a second adding step of adding an additional packet to the head of the second image data divided by the processing of the dividing step. It is characterized by

An image data processing apparatus and method of the present invention,
In a recording medium and a program, image data is input, an additional packet is added to the beginning of the input image data, the image data is divided into first image data and second image data, and the image data is divided. An additional packet is added to the beginning of the second image data.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 is a block diagram showing a configuration example of a hard disk recorder 100 to which the present invention is applied.

The MPEG encoder 11 has an internal bus 13
Via a CPU (Central Processing Unit) 14,
RAM (Random Access Memory) 15, ROM (Read Only)
Memory) 16, HDD (Hard Disk Drive) 17, operation unit 18, MPEG decoder 20, and IEEE (Inst)
itute of Electrical and Electronic Engineers) 1
In addition to being mutually connected to the 394 transmission unit 21, a drive 31 is further connected if necessary. The MPEG encoder 11 is also connected to the IEEE1394 receiver 12.

The IEEE 1394 receiver 12 receives the video signal and the audio signal transmitted from the television receiver 2 shown in FIG. 1 or the like, and transmits them to the MPEG encoder 11. The MPEG encoder 11 receives the video signal and the audio signal and generates an MPEG-TS. In addition, the MPEG encoder 11 uses the IEEE 139
4 MPEG-TS or MPE received from the receiver 12
The MPEG-TS generated by the G encoder 11 is
Output as divided if necessary.

The CPU 14 records the MPEG-TS transmitted from the MPEG encoder 11 in the HDD 17 via the internal bus 13.

Further, the CPU 14 executes the OS and various application programs when the user's instruction is input to the operation unit 18. The RAM 15 stores programs executed by the CPU 14 and parameters that change appropriately during the execution. The ROM 16 is generally a CPU
Of the programs used by 14 and the parameters for calculation, basically fixed data is stored.

The internal bus 13 drives the drive 3 as required.
1, the control program stored in the magnetic disk 51, the optical disk 52, the magneto-optical disk 53, or the semiconductor memory 54 is read, and the read control program is supplied to the HDD 17 for recording.

The CPU 14 controls the M recorded in the HDD 17
The PEG-TS is reproduced and transmitted to the MPEG decoder 20. The MPEG decoder 20 receives the received MPEG-TS.
Is decoded and output as a video signal and an audio signal. In addition, the MPEG recorded on the HDD 17
-TS can also be output as it is (without decoding) from the IEEE 1394 transmitter 21.

FIG. 4 is a block diagram showing an example of the internal structure of the MPEG encoder 11 of FIG.

The MPEG encoder 11 includes a PAT generation detection unit 201, a PMT generation detection unit 202, a sequence header generation detection unit 203, a private packet generation detection unit 204, a video encoding unit 205, an audio encoding unit 206, a multiplexing unit 207, A selection unit 208, a picture detection unit 209, and a demultiplexing unit 210 are provided, and data can be exchanged inside the MPEG encoder 11.

The PAT generation detector 201 and the PMT generation detector 202 generate and detect PAT and PMT, respectively, based on the input video signal. The sequence header generation / detection unit 203 performs a process of generating a sequence header based on the video signal and a process of detecting the sequence header. The video encoding unit 205 encodes the video signal by the MPEG method.

The audio encoding unit 206 encodes the input audio signal by the MPEG method. The multiplexing unit 207 multiplexes PAT, PMT, MPEG video data, and MPEG audio data, and MP
Generate EG-TS.

The selection unit 208 receives the MPEG-TS or IEEE from the multiplexing unit 207 based on the user's instruction.
One of the MPEG-TS from the E1394 receiver 12 is selected. The demultiplexing unit 210 performs a process reverse to the multiplexing process performed by the multiplexing unit 207.

FIG. 5 is a block diagram showing an internal configuration example of the MPEG decoder 20 of FIG.

The MPEG decoder 20 includes a PAT detection unit 261, a PMT detection unit 262, a sequence header detection unit 263, a private packet detection unit 264, a private packet storage unit 265, a video decoding unit 266,
Audio decoding unit 267 and demultiplexing unit 268
Are provided, and data can be exchanged inside the MPEG decoder 20.

The PAT detection unit 261 receives the input MPE.
Detect PAT from G-TS. PMT detector 262
Detects the PMT from the MPEG-TS based on the input PAT.

The demultiplexer 268 uses the PMT to generate the MP
The EG-TS is demultiplexed, the video packet is supplied to the video decoding unit 266 and the sequence header detection unit 263, and the audio packet is supplied to the audio decoding unit 267.

The sequence header detection unit 263 uses the MPE.
Detect the sequence header from the G-TS. The video decoding unit 267 performs a decoding process in the MPEG system based on the sequence header from the sequence header detecting unit 263 and the video packet from the demultiplexing unit 268, and outputs a video signal. Further, the audio decoding unit 267 decodes the audio packet by the MPEG method and outputs the audio signal.

The MPE recorded in the HDD 17
The G-TS can also be output by the IEEE 1394 transmitter 21.

Next, the MPEG-TS recording process in the hard disk recorder 100 will be described with reference to FIGS. 6 and 7. This process is performed by the user using the operation unit 18
Is operated to instruct the hard disk recorder 100 to start the recording process.

In step S41, the MPEG encoder 11 receives the video signal and audio signal input from the television receiver 2 of FIG. The sequence header generation detection unit 203 generates a sequence header for each GOP based on the input video signal.
The GOP is composed of, for example, 15 pictures, and is IBBPBBPBBPBBPBB in the order of encoding.
The video encoding unit 205 converts the received video signal into M
Encode with the PEG method. Video encoding unit 20
5, the encoded MPEG video data, G
A sequence header is inserted in OP (Group Of Picture) units (about every 500 msec). Video encoding unit 205
Outputs the MPEG video data to the multiplexing unit 207 when the encoding is completed.

In step 42, the audio encoding unit 206 receives the audio signal and encodes it according to the MPEG system. Audio encoding unit 206
Outputs the MPEG audio data to the multiplexing unit 207 when the encoding is completed.

In step S43, the PAT generation / detection section 201 detects the PAT (P
(Including the packet ID of MT), and the multiplexing unit 207
Send to.

In step S44, the PMT generation / detection section 202 determines the PMT (M
(Including a packet ID in which PEG video data and MPEG audio data are stored) is generated and transmitted to the multiplexing unit 207.

In step S45, the multiplexing unit 207
The received MPEG video data, MPEG audio data, PAT and PMT are multiplexed to create a packetized MPEG-TS, which is sent to the selection unit 208. The created MPEG-TS contains PAT and PMT.
, Respectively, are inserted about every 100 msec. The selecting unit 208 receives the MPEG-TS from the multiplexing unit 207 or the IEEE 1394 receiving unit 12. In the case of this example, the selection unit 208 uses the MP from the multiplexing unit 207.
Select EG-TS.

In step S46, the private packet generation / detection unit 204 generates a private packet (FIG. 9 described later) and adds it to the beginning of the MPEG-TS. MPEG-T to be recorded in the private packet
S-capacity, divided MPEG-TS, the previous M
Pointer to PEG-TS and next MPEG-TS
A pointer to is recorded.

In step S47, the CPU 14
The MPEG-TS is recorded in the HDD 17.

In step S48, the CPU 14
It is determined whether the MPEG-TS is divided. As described above, the maximum size of one file is limited in the HDD 17. Therefore, MP that exceeds the maximum size
When recording the EG-TS, it is necessary to divide at the boundary of the MPEG-TS packet. If it is determined that the division is not necessary, the process proceeds to step S53.

If it is determined in step S48 that division is necessary, in step S49 the CP
U14 sets the division position at the boundary of the MPEG-TS packet, sets the MPEG-TS up to the packet at the division position as the MPEG-TS before the division (first MPEG-TS),
MPEG-TS after dividing the subsequent MPEG-TS
(Second MPEG-TS).

In step S50, the private packet generation detector 204 determines the private packet 17
2 is generated and added to the head of the divided MPEG-TS.

In step S51, the private packet generation detector 204 has the private packet 171 before being divided (added in the process of step S45).
(FIG. 8 described later) is updated (at the time of the processing of step S45, since the division has not been performed yet, the next MPE
A pointer to the G-TS is not added, but this is added because division was performed at this point).

In step S52, the CPU 14
The divided MPEG-TS is recorded in the HDD 17.

When it is determined in step S48 that the MPEG-TS is not divided, or after the processing of step S52, the CPU 14 determines in step S53 whether or not to end the recording processing. If it is determined that the processing is not to be ended, the processing returns to step S41 and the subsequent processing is repeated.

When it is determined in step S53 that the process is to be ended, the CPU 14 ends the recording process.

FIG. 8 is a diagram for explaining an MPEG-TS divided by the above-described processing of FIGS. 6 and 7.

In the process of step S46 in FIG. 6, the private packet 171 is added, and the private packet 171 stores information of "pointer to previous MPEG-TS and pointer to next MPEG-TS". It The MPEG-TS is divided at the boundary of the MPEG-TS packet in the process of step S49 of FIG.
It becomes G-TS161. Remaining divided MPEG-TS
The private packet 172 is added to the head of the 162 in step S50 of FIG. MPEG-TS16
When 2 is further divided, it is divided again at the boundary of the MPEG-TS packet to become MPEG-TS163. By repeating such processing, the MPEG-TS is divided until the division is no longer necessary. At the beginning of the divided MPEG-TS, the divided M
PEG-TS private packets 171, 172,
173 is added.

FIG. 9 is a diagram for explaining a private packet. The private information 170 includes MPs to be divided.
EG-TS data length (Data Length), previous MP
Pointer (pointer_to_previous) to EG-TS, and pointer (pointer_to_next) to next MPEG-TS
Information is included. In MPEG-TS, one TS packet is 188 bytes (including 4 bytes of header)
Therefore, when converting data exceeding 184 bytes excluding the header into TS packets, it is necessary to divide the data.
For example, the amount of private information 170 is 400 by
In the case of te, the private packet is composed of 3 TS packets.

That is, the private packet 170A is added to the first TS packet of the header 181A (4 bytes).
(184 bytes) is included, and the private packet 180 is included in the second TS packet of the header 181B (4 bytes).
B (184 bytes) is included, header 181C (4 bytes)
Private packet 1 is the third TS packet of
70C (32 bytes) is included. The private packet 170C contains 32 bytes of private information,
The remaining 152 bytes are unused. The packet ID of the private packet is PID = 01xFFF.
TS packets with PID = 01xFFF are general MPEG-
It is ignored by the TS playback device.

Next, with reference to FIG. 10, the MPEG-TS reproduction processing in the hard disk recorder 100 will be described. The MPEG-TS to be reproduced is an MPEG-TS that is divided and recorded in the HDD 17 in advance in the processing of FIGS. 6 and 7. It should be noted that this process is started when the user operates the operation unit 18 to instruct the hard disk recorder 100 to start the reproduction process.

In step S81, the CPU 14
The MPEG-TS recorded on the HDD 17 is reproduced.

In step S82, the private packet detector 264 of the MPEG decoder 20 determines whether the CPU
A private packet is detected from the MPEG-TS reproduced by 14. Private packet detector 2
64 transmits the detected private packet to the private packet storage unit 265.

In step S83, the private packet storage unit 265 stores the private packet detection unit 2
Receive private packets detected by 64,
Remember.

In step S84, the PAT detector 2
Reference numeral 61 denotes a received MPEG-TS (for example, MPEG-
PAT is detected from TS161) and PMT packet I is detected.
Read D.

In step S85, the PMT detector 2
62 receives PAT (packet ID of PMT), and based on this, MPEG-TS (MPEG-TS1 of FIG. 8).
61) to PMT (MPEG video data and MPE
The packet ID in which the G audio data is stored is detected and transmitted to the demultiplexing unit 268.

In step S86, the demultiplexing unit 26
8 is an MP based on a packet ID in which MPEG video data and MPEG audio data are stored.
Extract MPEG video packets and MPEG audio packets from EG-TS (MPEG-TS161). The extracted MPEG audio packet is transmitted to the audio decoding unit 267, and the MPEG video packet is transmitted to the sequence header detecting unit 263 and the video decoding unit 266.

In step S87, the sequence header detecting unit 263 detects the sequence header from the received MPEG video packet, and the video decoding unit 266.
Send to.

In step S88, the video decoding unit 266 receives the sequence header, decodes the MPEG video packet transmitted from the demultiplexing unit 268 using the MPEG header as a reference, and outputs the decoded MPEG video packet.

In step S89, the audio decoding unit 267 MPEs the received audio packet.
Decode by G method and output.

In step S90, the CPU 14
It is determined whether the reproduction is finished. When it is determined that the processing is not completed, the CPU 14 is determined in step S91.
From the private information stored in the private packet storage unit 265 to the HDD of the next MPEG-TS.
Select from 17 and set. After the processing of step S91, the processing returns to step S81, and the subsequent processing is repeated.

By the above processing, since the private packet is added to the MPEG-TS divided in the processing of FIGS. 6 and 7, it is possible to clarify the context of the divided MPEG-TS. Thereby, step S90
Even in the case where it is determined that the reproduction has not ended, the private information can be read from the private packet storage unit 265 and the next MPEG-TS can be selected. Therefore, the MP recorded separately
It is possible to continuously reproduce the EG-TS (reproduce without losing the middle).

Although the added private packet is not removed in the processing of FIGS. 6 and 7, it is a packet that is ignored in the normal demultiplexer as described above (TS packet of PID = 01xFFF). Therefore, private packets can sometimes be decoded without being removed.

FIG. 11 is a block diagram showing an internal configuration example of an MPEG encoder in another hard disk recorder to which the present invention is applied.

In this example, the MPEG encoder 1 of FIG.
1 is provided with an overlap generation unit 281. M
The other configuration of the PEG encoder 11 is the MPE of FIG.
It is similar to the G encoder 11. The overlap generation unit 281 generates and adds an overlap to the divided MPEG-TS.

FIG. 12 is a block diagram showing an internal configuration example of an MPEG decoder in a hard disk recorder including the MPEG encoder of FIG.

In this example, the MPEG encoder 2 of FIG.
0 is provided with a picture detection unit 291. MPEG
The other configuration of the encoder 20 is the same as that of the MPEG encoder 20 of FIG. The picture detection unit 291 uses the I
Detect pictures, P pictures, and B pictures.

Next, referring to FIGS. 13 and 14, FIG.
The MPEG-TS recording process in the hard disk recorder 130 having the MPEG encoder 11 of No. 1 and the MPEG decoder 20 of FIG. 12 will be described. In this example, in addition to the processing of FIGS. 6 and 7, overlap is added after the private packet. This makes it possible to eliminate skipped data even when only the divided MPEG-TS is played back alone. It should be noted that this process is started when the user operates the operation unit 18 to instruct the hard disk recorder 130 to start the recording process.

Since the processing of steps S101 to S108 is the same as the processing of steps S41 to S48 of FIG. 6, description thereof will be omitted.

If it is determined in step S108 that the division is necessary, the CPU 14 makes the MPEG-T.
S is transmitted to the PAT generation detection unit 201, and step S10
9, the PAT generation detection unit 201 uses the MPEG-T
The PAT detection process is executed, for example, about 1 second before the division target position of S. This is about 1 for PAT and PMT
Inserted every 00 msec, sequence header is about 500 ms
Since it is inserted every ec, it is necessary to start the detection of PAT from about 1 second before the division target position in order to detect at least PAT, PMT and the sequence header at the division position. If the PAT, PMT, and sequence header insertion intervals are different, the PAT detection time may be changed.

In step S110, the CPU 14
Determines whether the PAT generation detection unit 201 has detected a PAT. If it is determined that it has not been detected, the process returns to step S109, and the subsequent processes are repeated.

If PAT has been detected, step S
At 111, the PAT generation detection unit 201 reads the packet ID of the PMT from the PAT and transmits it to the PMT generation detection unit 202.

In step S112, the RAM 15
Starts the storage of MPEG-TS from the packet of the detected PAT (PAT of FIG. 15 described later).

In step S 113, the PMT generation detection unit 202 receives the P received from the PAT generation detection unit 201.
From MPEG-TS to P based on MT packet ID
Detect MT.

In step S114, the CPU 14
Determines whether the PMT generation detector 201 has detected a PMT. If it is determined that it has not been detected, the process returns to step S113, and the subsequent processes are repeated.

When it is determined in step S114 that the PMT is detected, in step S115
The PMT generation detection unit 202 reads the packet IDs of the video packet and the audio packet from the PMT, and sends them to the demultiplexing unit 210.

In step S116, the demultiplexing unit 2
10 extracts the video packet and the audio packet based on the packet ID of the video packet and the audio packet received from the PMT generation detection unit 202,
The video packet is transmitted to the sequence header generation / detection unit 203.

In step S117, the sequence header generation / detection unit 203 receives the video packet and detects the sequence header from it.

In step S118, the picture detection unit 209 sequentially detects one I picture, one P picture, and the following two B pictures from the video packet after the sequence header.

In step S119, the CPU 14
Determines whether the second B picture after the P picture is detected. If it is determined that it has not been detected, it waits until it is detected.

When the second B picture after the P picture is detected, in step S120, the CPU 14
Is the MPEG-TS up to the packet of the second B picture after the P picture is the MPEG-TS before division (first MPEG-TS), and the subsequent MPEG-TS is the MPEG-TS (after division). The second MPEG-TS).

In step S121, the RAM 15
Stores up to the packet of the second B picture after the P picture (the B picture described at the position of step S119 in FIG. 15 described later).

In step S122, the overlap generator 281 determines the MPE stored in the RAM 15.
The G-TS is read and the overlap is generated. The overlap generator 191 adds an overlap to the beginning of the divided MPEG-TS.

FIG. 15 is a diagram showing an example of an array of pictures at the time of division. In the case of this example, the pictures after the sequence header detection are arranged in the order of IBBPBBPB .... In the process of step S118, since the P picture is detected after the I picture is detected, the detected P picture becomes the fourth P picture. Next, since the B picture is detected, the detected B picture is the fifth B picture. At this time, the last packet of the second B picture after the P picture is the B picture shown in the sixth, so R
The overlap recorded in the AM 15 is from PAT to B picture as shown in FIG. Also,
The division position is after IBBPBB, as shown in FIG.

In step S123, the private packet generation detector 204 adds a private packet before the overlap (private packet 202 in FIG. 15).

In step S124, the CPU 14
Updates the private packet before division.

In step S125, the HDD 17
Records MPEG-TS.

After the processing of step S125, or when it is determined in step S108 that the division is not performed, the CPU 14 determines in step S126 whether or not to end the recording processing. When it is determined that the processing is not ended, the process returns to step S101 and the subsequent processing is repeated. If it is determined in step S126 to end, the process ends.

Next, referring to FIG. 16, the MPE of FIG.
G encoder 11 and MPEG decoder 20 of FIG.
In hard disk recorder 130 having
The G-TS reproduction process will be described. MPEG to play
-TS is the HDD in the processing of FIG. 13 and FIG.
The MPEG-TS is divided into 17 and recorded. In addition,
This process is started when the user operates the operation unit 18 to instruct the hard disk recorder 130 to start the reproduction process.

The processing of steps S141 to S147 is the same as the processing described in steps S81 to S87 of FIG.

In step S 148, the picture detection unit 291 determines that the MPEG transmitted from the demultiplexing unit 268.
Receive video packets, I picture, P picture, B
The pictures are sequentially detected. At this time, the detected picture is the same picture as the picture detected in step S118 of FIGS. 13 and 14, and an overlapping picture is detected. MP at the beginning of the division
Since there is no overlap in EG-TS, step S
When the private packet detected in the process of 142 does not include overlap information (when the overlap is 0), the process executes the same process as in FIG. 10.

In step S149, the CPU 14
Is determined by the picture detection unit 291 to be 2 after the P picture.
It is determined whether the th B picture has been detected. When it is determined that the B picture has been detected, that is,
If it is determined that the overlap has ended, the processing is
It proceeds to step S150. When it is determined that the B picture detection is not completed, the CPU 14 waits until the B picture detection is completed.

If a B picture is detected, step S
At 150, the picture detection unit 291 notifies the video decoding unit 266 of the detection of the B picture. The video decoding unit 266 starts decoding the video packet after detecting the B picture, and the decoded video signal is output.

In step S151, the audio decoding unit 267 receives the audio packet transmitted from the demultiplexing unit 268, decodes it, and then outputs it.

In step S152, the CPU 14
Determines whether or not the reproduction process has ended. If it is determined that the processing is not finished, in step S153, the CPU
14 selects the next MPEG-TS from the HDD 17 from the information stored in the private packet storage unit 265 and sets it. After the process of step S153, the process returns to step S141, and the subsequent processes are repeated.

FIG. 17 is a diagram for explaining the MPEG-TS divided by the processing of FIGS. 13 and 14.

In the process of step S106 of FIG. 13, the private packet 201 is added, and the private packet 201 has a "pointer to the previous MPEG-TS,
Information of "pointer to next MPEG-TS and overlap size" is stored. The MPEG-TS is divided by the last packet of the B picture in the process of step S120 of FIG. 14, and becomes MPEG-TS201. The overlap size at this time is 0. At the beginning of the remaining divided MPEG-TS, step S1 in FIG.
In step 22, overlap is added, and step S123 is performed.
Then, the private packet is added before the overlap. In the overlap, as described above, the first PAT from step S1 to the step 1
Up to the B picture detected by the processing of 19 are stored. When further dividing the remaining MPEG-TS, the PAT is detected again one second before the division target position, and B
It is divided by the last packet of the picture and MPEG-TS2
02. By repeating such processing, M
The PEG-TS is divided until the division is no longer necessary. A private packet and then an overlap are added to the head of the divided MPEG-TS.

In this way, the divided MPEG is generated by generating the private packet and the overlap.
-TS can be continuously reproduced in the input order. Further, since the private packet is recorded in the private packet storage unit 265, it is possible to read the MPEG-TS next to the MPEG-TS which has been reproduced from the HDD 17 and continuously reproduce it. Further, even when the divided MPEG-TS is played back independently, it is possible to eliminate the skipped data due to the overlap.

As described above, the hard disk recorder 1
In 00, by adding a private packet, the context of the divided MPEG-TS is clarified, and continuous reproduction is possible.

Also, private information can be added without adversely affecting a general decoder.

Further, by adding the overlap, even when the divided MPEG-TS is reproduced independently, it is possible to reproduce without loss of data.

The series of processes described above can be executed not only by hardware but also by software. When a series of processes is executed by software, a program that constitutes the software executes a variety of functions by installing a computer in which dedicated hardware is installed or various programs. It is installed from a recording medium into a general-purpose personal computer or the like capable of performing the above.

This recording medium, as shown in FIG.
A magnetic disk 51 (including a floppy disk) on which a program is recorded, which is distributed to provide a program to a user separately from a computer, and an optical disk 5.
2 (CD-ROM (Compact Disc-Read Only Memory),
Not only is it composed of a package medium such as a DVD (including a Digital Versatile Disc), a magneto-optical disc 53 (including an MD (Mini Disc)), a semiconductor memory 54, etc. H that the program provided is recorded
It is composed of the DD 17 and the like.

In this specification, the steps for writing a computer program are not limited to the processing performed in time series according to the order described, but are not necessarily performed in time series, but are performed in parallel or individually. It also includes the processing.

[0119]

As described above, according to the present invention, continuous reproduction is possible when image data composed of packets is divided and recorded and reproduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a conventional hard disk recorder.

2 is a diagram illustrating MPEG-TS divided and recorded by the hard disk recorder of FIG. 1 and video data to be reproduced.

FIG. 3 is a block diagram showing a configuration example of a hard disk recorder to which the present invention has been applied.

FIG. 4 is a block diagram showing an example of the internal configuration of the MPEG encoder of FIG.

5 is a block diagram illustrating an internal configuration example of the MPEG decoder of FIG.

6 is an MPE in the hard disk recorder of FIG.
It is a flow chart explaining G-TS recording processing.

7 is an MPE in the hard disk recorder of FIG.
It is a flow chart explaining G-TS recording processing.

8 is an MPEG-divided by the processing of FIG. 6 and FIG.
It is a figure explaining TS.

FIG. 9 is a diagram illustrating a private packet.

10 is an MP in the hard disk recorder of FIG.
It is a flow chart explaining EG-TS reproduction processing.

FIG. 11 is a block diagram showing an internal configuration example of an MPEG encoder in a hard disk recorder to which the present invention has been applied.

12 is a block diagram showing an internal configuration example of an MPEG decoder in a hard disk recorder including the MPEG encoder of FIG.

FIG. 13 is a flowchart illustrating an MPEG-TS recording process in the hard disk recorder including FIGS. 11 and 12.

FIG. 14 is a flowchart illustrating an MPEG-TS recording process in the hard disk recorder including FIGS. 11 and 12.

FIG. 15 is an MPEG-TS in the processing of FIGS. 13 and 14;
It is a figure explaining the arrangement | sequence of the picture at the time of dividing.

16 is a flowchart illustrating an MPEG-TS reproduction process in the hard disk recorder including FIGS. 11 and 12. FIG.

FIG. 17 is an MP divided by the processing of FIGS. 13 and 14;
It is a figure explaining EG-TS.

[Explanation of symbols]

11 MPEG encoder, 17 HDD, 20
MPEG decoder, 201 PAT generator, 202
PMT generation detection unit, 203 sequence header generation detection unit, 204 private packet generation detection unit,
205 video encoding unit, 206 audio encoding unit, 207 multiplexing unit, 209 picture detecting unit, 210 demultiplexing unit, 261 PAT detecting unit, 262 PMT detecting unit, 263 sequence header detecting unit, 264 private packet detecting unit,
265 private packet storage unit, 266 video decoding unit, 268 demultiplexing unit, 281 overlap generation unit, 291 picture detection unit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuki Aisaka             6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Soni             -Inside the corporation F-term (reference) 5C053 FA20 FA23 GB06 GB37 JA03                       JA24 LA06 LA07 LA14                 5C059 MA00 MA04 MA05 MA14 PP05                       PP06 PP07 RB02 RC24 SS11                       UA02 UA05                 5D044 AB05 AB07 BC01 CC05 DE12                       DE40 FG18 FG21 GK08 GK12

Claims (14)

[Claims] 1. An image data processing device for dividing and outputting image data composed of packet units, wherein an input means for inputting the image data, and an additional packet at the head of the image data input by the input means. A first adding means for adding, a dividing means for dividing the image data into first image data and second image data, and a head of the second image data divided by the dividing means, An image data processing device, comprising: a second adding unit that adds the additional packet. 2. The image data processing apparatus according to claim 1, further comprising a changing unit that changes the content of the additional packet at the head of the first image data. 3. The image data processing device according to claim 2, wherein the additional packet includes address information necessary to access a head of the divided image data. 4. The image data processing apparatus according to claim 1, wherein the image data is MPEG-TS, and the additional packet is a private packet. 5. The image data processing apparatus according to claim 1, further comprising recording means for recording the first image data and the second image data on a recording medium. 6. The I of a first packet including IDs of video packets and audio packets from the image data to which the additional packet is added by the first adding means.
A first detecting means for detecting a second packet including D, and a second detecting means for detecting the first packet from the image data based on the second packet detected by the first detecting means. Detecting means for detecting the header located at the beginning of the compression unit of the image data from the image data based on the detection result of the second detecting means, and the third detecting means. The image data processing apparatus according to claim 1, further comprising a fourth detection unit that detects a predetermined frame from the image data based on the detection result of. 7. The method according to claim 6, wherein the first packet is a packet including a PMT, the second packet is a packet including a PAT, and the header is a sequence header. The image data processing device described. 8. The image data processing apparatus according to claim 1, wherein the dividing unit configures a terminal portion of the first image data with a part of pictures in one group of pictures. . 9. The dividing means divides some pictures in the one group of pictures into one I picture,
9. The image data processing device according to claim 8, wherein the image data processing device comprises one P picture and four B pictures. 10. The method according to claim 8, further comprising a third addition unit that adds an overlapping portion that overlaps the end portion of the first image data to the head of the second image data. Image data processing device. 11. A recording means for recording the first image data and the second image data on a recording medium, a reproducing means for reproducing the image data recorded on the recording medium, and the first image. 11. The reproducing device according to claim 10, further comprising: a removing unit that removes the overlapping portion added to the head of the second image data when reproducing the second image data following the data. Image data processing device. 12. An image data processing method of an image data processing device for dividing and outputting image data composed of packet units, comprising: an input control step of controlling input of the image data; and a processing of the input control step. A first adding step of adding an additional packet to the beginning of the input-controlled image data; a dividing step of dividing the image data into first image data and second image data; A second adding step of adding the additional packet to the head of the second image data divided by the processing, the image data processing method. 13. A program for controlling an image data processing device that divides and outputs image data composed of packet units, the input control step controlling input of the image data, and the processing of the input control step. A first adding step of adding an additional packet to the beginning of the image data whose input is controlled by; a dividing step of dividing the image data into first image data and second image data; and the dividing step. And a second adding step of adding the additional packet to the head of the second image data divided by the processing of 1. The recording medium having a computer-readable program recorded thereon. 14. A computer for controlling an image data processing device for dividing and outputting image data composed of packets, and an input control step for controlling input of the image data, and an input by the processing of the input control step. A first adding step of adding an additional packet to the beginning of the image data for which the control is performed, a dividing step of dividing the image data into first image data and second image data, and processing of the dividing step And a second addition step of adding the additional packet to the head of the second image data divided by the program.