JP2001298715A - Stream recorder, stream editor, stream reproducing device and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stream recorder and a stream editor that can maximize an idle capacity when a TS packet other than a prescribed packet identifier is eliminated from a transport stream recorded on a recording medium. SOLUTION: A packet separation means 102 separates packets by each PID from a received transport stream TS. Time information addition means 106-108 receive the separated packet stream to add each received time to the stream and outputs the resulting packet stream to buffer means 109-111. A system control means 105 controls the data stored in the buffer means to be recorded in a recording medium 114 in the unit of sectors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stream recording apparatus for recording a digital stream supplied by digital broadcasting or a digital interface on a recording medium, a stream editing apparatus for editing a stream recorded on the recording medium, and recording. The present invention relates to a stream reproducing apparatus for reproducing a stream recorded on a medium.

[0002]

2. Description of the Related Art In recent years, digital broadcasting using satellites, terrestrial waves and the like has been started. Generally, in digital broadcasting, compression-encoded video, audio data, additional data, and management data are multiplexed for a plurality of channels and transmitted. Video and audio are generally MPEG1 format or MP
It is compression-coded by the EG2 method or the like. For multiplexing, generally, an MPEG2 transport stream (Tr
transport stream (hereinafter abbreviated as TS). In addition, a standard for transmitting such a TS between a set-top box and another device using a digital interface such as IEEE 1394 is defined.

FIGS. 9A and 9B show a general structure of a TS. TS is a packet of 188 bytes (TS packet)
It is composed of Each TS packet can be divided into a header portion and a data portion. The header of the TS packet includes a packet identifier and Program Cl
ock Reference (PCR). The packet identifier indicates the type of data stored in the data section. Video data,
One type of data, such as audio data, program specification information data, and additional data, is included. Also P
CR is reference time information.

As shown in FIG. 9A, video data,
The code string of the audio data and the additional data is called an elementary stream. The elementary stream is packetized in a predetermined unit, and is packetized.
It becomes an Elementary Stream (PES) packet. The PES packet is composed of a PES packet header and PES packet data that is a part of the elementary stream. The PES packet is packetized in a predetermined unit, and becomes a TS packet by adding a TS packet header. The PES packet header contains the decoding time (D
TS), display time (PTS), and the like.

As shown in FIG. 9B, the program specification information is called a PSI section. The PSI section includes a PSI section header and a PSI table. The PSI section is packetized in a predetermined unit, and becomes a TS packet by adding a TS packet header.

The TS can reproduce synchronized video, audio and the like by decoding it in the order of arrival while referring to header information and management data. JP-A-8-235832 discloses a device for recording a TS on a disk. This publication proposes a method in which a continuous TS packet is divided and recorded in sector units.

[0007]

In the above conventional method,
The packet sequence of the input TS is continuously recorded in each sector on the disk. Here, it is assumed that after recording the TS on the disc, only the TS packet having a predetermined packet identifier is left and other TS packets are deleted. For example, this case corresponds to a case where after recording the AV data of a certain program and the data broadcast accompanying the program, the AV data is deleted while leaving only the data broadcast. In such a case, if there is at least one TS packet having a predetermined packet identifier in one sector, the sector must be left without being deleted. Therefore, the free space hardly increases. As described above, the conventional method has a problem.

The present invention solves the above-mentioned problems, and a stream recording apparatus capable of maximizing the free space when a TS packet other than a predetermined packet identifier is deleted from a TS recorded on a recording medium. And a stream editing device.

[0009]

In order to achieve the above object, a stream recording apparatus according to the present invention comprises: a packet separating means for separating an input transport stream (TS) into packets having the same packet identifier; Buffer means for temporarily storing a packet sequence for each packet identifier output from the packet separating means for each packet sequence; extracting data from the buffer means; and recording data having the same packet identifier for each predetermined unit of the recording medium And a system control means for performing control as described above.

[0010] Alternatively, the stream recording apparatus of the present invention separates an input transport stream (TS) into a first packet having a predetermined packet identifier and a second packet not having the predetermined packet identifier. Packet separating means, first buffer means for temporarily storing the first packet output from the packet separating means, and second buffer for temporarily storing the second packet output from the packet separating means. Buffer means, and system control means for taking out data from the first and second buffer means and controlling the data taken out from the first and second buffer means to be recorded in different areas on a recording medium. Configuration.

[0011] Alternatively, the stream editing apparatus according to the present invention provides a transport stream (TS) recorded on a recording medium.
A data reproducing unit that reads out a packet, a packet extracting unit that receives a TS output from the reproducing unit, extracts a packet having a predetermined packet identifier from the TS, and outputs the extracted packet, and the packet that is output from the packet extracting unit. And data recording means for recording the data on the recording medium.

[0012] Alternatively, the stream editing apparatus of the present invention provides a transport stream (TS) recorded on a recording medium.
A data reproducing means for reading out the data, a TS output from the reproducing means, a data extracting means for extracting a predetermined unit of data including a packet having a predetermined packet identifier from the TS, and outputting the data, Data recording means for recording data output from the extracting means on the recording medium.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 shows a packet separating means 10.
2. Reference time generation means 103, PMT / PAT decoder 104, system control means 105, time information addition means 1
06, 107, 108, buffer means 109, 110,
111, the selector 112, the signal processing unit 113, the configuration of the stream recording apparatus 101 from the recording medium 114,
FIG. 3 is a block diagram showing a tuner unit 151 connected to an input stage of the stream recording device 101.

The broadcast wave input to the tuner 151 via an antenna or the like is subjected to processing such as demodulation of the transmission carrier selected by the tuner 151, and is output as a transport stream (hereinafter TS). Here, for simplicity of description, it is assumed that the TS includes only one program stream. Here, the program corresponds to, for example, a program.

The packet separating means 102 performs three major operations. The first is P from the header of the TS packet.
This is the extraction of CR. The PCR is not added to the header of every TS packet, but if it is added, the PCR is extracted. The extracted PCR is output to the reference time generation means 103.

The reference time generation means 103 generates a reference time using the PCR received from the packet separation means 102. In MPEG2-TS, PCR is 27MH
It is indicated by a value in which one clock of z is the minimum unit. Therefore, the reference time generation means 103 generates a 27 MHz clock using the PLL using the value of the PCR.
The reference time can be generated by counting the clock. The generated reference time is output to the time information adding means 106, 107, 108.

The second operation of the packet separating means 102 is to determine a program association table (PA) from the program specification information TS packet included in the TS.
T) and the program map table (PMT)
That is to output it to the PAT / PMT decoder 104. In the PAT / PMT decoder 104, the packet identifier (P) of the data included in the TS input from the tuner 151 is determined from the input PAT and PMT.
ID). Here, the TS contains video data,
It is assumed that three types of data, audio data and additional data, are included. Therefore, the PAT / PMT decoder 104 extracts PIDs of video data, audio data, and additional data, and extracts them from the system control unit 105.
Output to

The system control means 105 outputs PIDs of video data, audio data and additional data to the packet separating means 102.

The third operation of the packet separating means 102 is to separate the TS input from the tuner section. This is the PID of the video data, audio data, and additional data input from the system control means 105.
This is performed using The packet separation method will be described with reference to FIG.

FIG. 2A shows the state of the TS input to the packet separating means 102. In FIG. 2A, the horizontal axis is time. The time here is the time generated by the reference time generation means 103. FIG.
In (a), one square box indicates one TS packet. 201 is a program specification information TS packet, 202 is a video TS packet, and 203 is an audio TS packet. The same pattern for other TS packets indicates the same type of TS packet.

In the packet separating means 102, FIG.
The video TS packet is separated from the TS. Therefore, every time the header of a TS packet is found, the PID of the TS packet is checked, and the PID is the PID of the video TS packet.
If so, the TS packet is transferred to the time information adding means A10.
6 is output. Similarly, it outputs an audio TS packet to time information adding means B107 and an additional data TS packet to time information adding means C108. FIGS. 2B to 2D show the states of the packets output from the packet separating means 102 in this manner.

The time information adding means A to C add the reception time of the TS packet to the input TS packet sequence while referring to the time information received from the reference time generation means 103, and add the buffer means A to C. Output to C. FIG. 3 shows the state of the packet sequence output by the time information adding means A to C.

The system control means 105 monitors the buffer amounts of the buffer means A to C, and controls the buffer means to output the data to the selector means 112 when a predetermined amount or more of data is accumulated. For example, when recording is performed on the recording medium 114 in units of sectors, data of one or more sectors may be output to the selector unit 112 if accumulated. In the system control means 105, buffer means A to C
Performs output control such that no overflow and underflow occur.

In the selector means 112, the buffer means A
To C is output to the signal processing means 113. Then, the signal processing unit 113 records the data on the recording medium 114 in sector units. At this time, data having a larger data amount than other types of data (generally, video data has a larger data amount than audio data and additional data) may be recorded in consecutive sectors. I don't know. Whether data is recorded in consecutive sectors is determined by the ratio of the data amount of each data and the control method of the buffer means A to C of the system control means 105.

As described above, the stream recording apparatus of the present invention separates the input TS for each data specified by the PID, and records each data on the recording medium for each predetermined unit (for example, sector). .

Therefore, by using the stream recording apparatus of the present invention, the same recording unit (for example, sector)
Only data having the same PID is recorded therein. Therefore, when only data having a predetermined PID is deleted after recording, a free area can be effectively generated.

In the first embodiment, a case has been described where the TS includes video data, audio data, and additional data. However, this may include other data.

In this embodiment, the case where recording is performed on the recording medium in units of sectors has been described. However, this is not the case with other units such as ECC units, cluster units, track units,
It may be a zone unit or the like.

In this embodiment, the case where the TS received from the tuner unit is recorded and edited has been described. However, this may be another input format, for example, an input from a digital interface.

The recording medium in the present embodiment may be any recording medium such as a magnetic disk, a magnetic tape, an optical disk, and a semiconductor memory.

(Embodiment 2) Embodiment 2 of the present invention will be described with reference to FIG. However, in the present embodiment, the time information adding means C108 and the buffer means C111 are not used. The broadcast wave input to the tuner unit 151 via an antenna or the like is subjected to processing such as demodulation for the transmission carrier selected by the tuner unit 151, and is output as a TS.

The packet separating means 102 first extracts a PCR from the header of the TS packet. Extracted P
The CR is output to the reference time generation unit 103.
The reference time generation means 103 generates a reference time using PCR, and the reference time is determined by the time information addition means 106, 1
07 is output.

The packet separating means 102 obtains a program specification information from the information of the TS packet included in the TS.
The AT and the PMT are obtained and output to the PAT / PMT decoder 104. PAT / PMT decoder 1
In step 04, a packet identifier (PID) of data included in the TS is extracted from the input PAT and PMT.
Here, video data, audio data,
It is assumed that three types of additional data are included. Then, the extracted PID is output to the system control means 105.

The PID of data to be recorded in another area is input to the system control means 105 from the user via 116. Here, it is assumed that the PID of the additional data is specified. The system control means 105 sends video data, audio data,
The PID of the additional data is output. The video data and the audio data are output to the time information adding means A106, and the additional data is output to the time information adding means B107.

The packet separating means 102 receives the command from the system control means 105 and separates the TS input from the tuner. The packet separation method will be described with reference to FIG. FIG. 4A shows the packet separating means 102.
2 shows the state of the TS input to the. In FIG. 4A, the horizontal axis is time. The time here is the time generated by the reference time generation means 103. In FIG. 4A, one square box indicates one TS packet.

In the packet separating means 102, FIG.
Is separated from the additional data TS packet. Therefore, each time the header of a TS packet is found, the PID of the TS packet is checked. If the PID is the PID of the additional data TS packet, the TS packet is output to the time information adding means B107. If it is not an additional data TS packet, that is, if it is a video data TS packet or an audio data TS packet, it outputs to the time information adding means A106. Thus, the state of the packet output from the packet separating means 102 is shown in FIGS.
It is shown in (c). Here, FIG. 4B shows a TS packet sequence output to the time information adding unit A106, and FIG. 4C shows a TS packet sequence output to the time information adding unit B107.

The time information adding means A and B add the reception time of the TS packet to the input TS packet sequence while referring to the time information received from the reference time generating means 103, and Output to B. FIG. 4 shows a state of a packet sequence output by the time information adding means A.
FIG. 4D shows the state of the packet sequence output by the time information adding means B.

The system control means 105 monitors the buffer amounts of the buffer means A and B, and controls the buffer means to output the data to the selector means 112 when a predetermined amount or more of data is accumulated. For example, assuming that recording is performed on the recording medium 114 in sector units, if data of one or more sectors has been stored, the data may be output to the selector means 112. In the system control means 105, buffer means A,
Output control is performed so that B does not cause overflow and underflow.

The selector means 112 outputs data input from one of the buffer means A and B,
The signal processing means 113 records data on the recording medium 114 in sector units. In this case, the output from the buffer unit A109 and the output from the buffer unit B110 may be recorded continuously or in different areas. In the former case, the recording position on the recording medium is as shown in FIG. In FIG. 5A, a solid line and a broken line indicate recording tracks. In the latter case, the recording position on the recording medium is as shown in FIG. In FIG. 5B, a solid line and a broken line indicate a set (recording area) of recording tracks.

As described above, the stream recording apparatus of the present invention extracts a TS packet having a designated PID from an input TS. Then, the TS packet sequence having the designated PID and the TS packet sequence having no designated PID are separately recorded. Here, the unit of separation may be a sector unit or may be recorded in another area.

Therefore, by using the stream recording device of the present invention, a TS packet sequence having a predetermined PID is recorded in a different sector or area from other TS packet sequences, and after recording, a predetermined PID is recorded. When only the data having the predetermined PID is deleted, or when the data other than the data having the predetermined PID is deleted, the empty area can be effectively generated.

In the second embodiment, a case has been described in which the TS includes video data, audio data, and additional data. However, this may include other data.

In this embodiment, a case has been described in which recording is performed on a recording medium in sector units or area units. However, the recording may be performed in other units such as ECC units, cluster units, track units, zone units, and the like. good.

In this embodiment, a case has been described where the PID of the additional data is specified as the PID specified by system control means 105 via 116.
This may be another PID.

In this embodiment, the case where the TS received from the tuner unit is recorded and edited has been described, but this may be another input format, for example, an input from a digital interface.

The recording medium in the present embodiment may be any recording medium such as a magnetic disk, a magnetic tape, an optical disk, and a semiconductor memory.

(Embodiment 3) Embodiment 3 of the present invention will be described with reference to FIG. FIG.
2. PMT / PAT decoder 604, system control means 605, buffer means 609, data recording means 613,
FIG. 14 is a block diagram of a stream editing device including a recording medium 614 and a data reproducing unit 615. Now, it is assumed that the TS is recorded in the recording medium 614 as it is in a logically continuous form. However, it is assumed that time information and the like have already been added.

The system control means 605 includes the recording medium 61
4 to reproduce the TS recorded therein. The reproduced TS is input to the data reproducing unit 615. In the data reproducing unit 615, signal processing for returning from the recording method on the recording medium to digital data is performed, and the TS is input to the packet extracting unit 602.

A packet identifier (PID) of data to be recorded in another area is input to the system control unit 605 via the user 616. Here, it is assumed that the PID of the additional data is specified.

The packet extracting means 602 derives the PA from the program specification information TS packet information contained in the TS.
It acquires T and PMT and outputs it to the PAT / PMT decoder 604. PAT / PMT decoder 60
In step 4, the PID of the data included in the TS is extracted from the input PAT and PMT. Here, it is assumed that the TS includes three types of data: video data, audio data, and additional data. And the extracted PID
Is output to the system control unit 605. The system control means 605 instructs the packet extracting means 602 to output the PID of the additional data and to extract only the additional data packet.

The packet extracting means 602 receives a command from the system control means 605 and extracts a packet having a specified PID from the input TS. A method for extracting a packet will be described with reference to FIG. FIG. 4A shows a state of a TS input to the packet extracting means 602. In FIG. 4A, the horizontal axis is time, and one square box indicates one TS packet. In the description of the third embodiment, it is assumed that the time information located at the head of the packet is not shown in FIGS. 4A and 4B.

In the packet extracting means 602, FIG.
Is separated from the additional data TS packet. Therefore, every time the header of a TS packet is found, the PID of the TS packet is checked. If the PID is the PID of the additional data TS packet, the TS packet is stored in the buffer unit 6.
09 is output. Thus, the packet extracting means 6
FIG. 4 (c) shows the state of the packet output from 02.

The packet shown in FIG. 4C is input to the buffer means 609. The state of the packet sequence at this time is shown in FIG.

The system control means 605 monitors the buffer amount of the buffer means 609, and if data of a predetermined amount or more has been stored and reproduction from the recording medium 614 has not been performed, the data recording means 6
13 to output data. The data recording unit 613 performs signal processing for recording on the input packet sequence, and then records the packet sequence on the recording medium 614. Here, the packet sequence output from the buffer unit 609 may be recorded in a free area other than the area where the original TS is recorded on the recording medium, or when the original TS is unnecessary, the original TS may be recorded. The information may also be recorded in the area where the TS is recorded.

As described above, the stream editing apparatus according to the present invention uses the P specified by the TS recorded on the recording medium.
The TS packet having the ID is extracted. And the specified P
A TS packet sequence having an ID is recorded on a recording medium.

Therefore, by using the stream editing apparatus of the present invention, when it is desired to delete data other than the packet sequence having a predetermined PID from the TS, the original TS
It is not necessary to leave the sector in which the packet of the predetermined PID is recorded. That is, all the original TSs are deleted,
What is necessary is just to leave a newly generated packet sequence having a predetermined PID. Therefore, an empty area can be effectively generated.

Although the case has been described with Embodiment 3 where the TS includes video data, audio data, and additional data, the TS may include other data.

In this embodiment, a case has been described in which the PID of the additional data is specified as the PID specified by the system control means 605 via 609.
This may be another PID. Also specify the PID
Need not be one.

In the present embodiment, if the PID of the data contained in the original TS is known in advance, the PAT / PMT decoder 604 becomes unnecessary, so that
It does not have to be used.

In this embodiment, a case has been described where the TS is reproduced from the recording medium 614 and a packet sequence having a predetermined PID is recorded again on the same recording medium. However, this may be a different recording medium. .

The recording medium in the present embodiment may be any recording medium such as a magnetic disk, a magnetic tape, an optical disk, and a semiconductor memory.

(Embodiment 4) Embodiment 4 of the present invention will be described with reference to FIG. FIG.
2. PMT / PAT decoder 704, system control means 705, buffer means 709, data recording means 713,
FIG. 14 is a block diagram of a stream editing device including a recording medium 714 and a data reproducing unit 715. Now, it is assumed that the TS is recorded in the recording medium 714 as it is in a logically continuous form. However, it is assumed that time information and the like have already been added to the TS at the time of recording.

The system control means 705 includes the recording medium 71
4 to reproduce the TS recorded therein. The reproduced TS is input to the data reproducing unit 715. In the data reproducing unit 715, signal processing for returning from a recording method on the recording medium to digital data is performed, and the TS is input to the sector extracting unit 702. Further, a packet identifier (PID) of data to be recorded in another area is input to the system control unit 705 via the user 716. Here, it is assumed that the PID of the audio data is specified.

The sector extracting means 702 extracts the PAT from the program specification information TS packet information contained in the TS.
And PMT, and obtains the PAT / PMT decoder 7
04 is output. PAT / PMT decoder 704
Then, the PID of the data included in the TS is extracted from the input PAT and PMT. Here, it is assumed that the TS includes three types of data: video data, audio data, and additional data. And the extracted PID
Is output to the system control unit 705.

The system control means 705 instructs the sector extracting means 702 to output the PID of the audio data and to extract only the sector including the audio data packet.

The sector extracting means 702 receives a command from the system control means 705 and extracts a sector having a specified PID from the input TS. The extraction method will be described with reference to FIG. FIG. 8A shows the sector extracting means 7.
2 shows a state of a TS input to the input unit 02. FIG. 8 (a)
, One square box indicates one TS packet. It is also assumed that the time information located at the head of the packet is not shown. Further, it is assumed that four packets are recorded in one sector. Here, 841, 84
2, 843 and 844 indicate a group of packets recorded in the sector.

The sector extracting means 702 separates the sector including the audio data TS packet from the TS shown in FIG. Therefore, every time the header of a TS packet is found, the PID of the TS packet is checked. If the PID is the PID of the audio data TS packet, sector data including the TS packet is output to the buffer unit 709. Here, the audio data TS packet is included in the sectors 842 and 844. Therefore, the sector data output from the sector extracting means 702 is as shown in FIG.
become that way. Then, the packet in FIG. 8B is input to the buffer unit 709.

The system control means 705 monitors the buffer amount of the buffer means 709, and if data of a predetermined amount or more has been accumulated and reproduction from the recording medium 714 is not being performed, the buffer means 709 sends the data to the data recording means. 7
13 to output data. The data recording unit 713 performs recording signal processing on the input sector data, and then records the data on the recording medium 714. Here, the data output from the buffer unit 709 may be recorded in a free area on the recording medium other than the area where the original TS is recorded, or when the original TS is unnecessary, the original TS may be recorded. May also be recorded in the area where is recorded.

As described above, the stream editing apparatus of the present invention extracts sector data including a TS packet having a specified PID from a TS recorded on a recording medium. Then, the extracted data is recorded on a recording medium.

Therefore, by using the stream editing apparatus of the present invention, when data other than the sector including the packet having the predetermined PID is to be erased from the TS, the sector data to be left is continuously recorded. be able to. Therefore, when the TS data is erased, a continuous empty area can be secured, and the empty area can be effectively generated.

In the fourth embodiment, the case where video data, audio data, and additional data are included in the TS has been described. However, this may include other data.

In the present embodiment, the case has been described where the PID of the audio data is specified as the PID specified by the system control means 705 via 709, but this may be another PID. The number of PIDs to be specified may not be one.

In this embodiment, if the PID of the data included in the original TS is known in advance, the PAT / PMT decoder 704 becomes unnecessary, and
It does not have to be used.

Further, in the present embodiment, the case has been described where the TS is reproduced from the recording medium 714 and the packet sequence having the predetermined PID is recorded again on the same recording medium, but this may be a different recording medium. .

In this embodiment, a case has been described in which data including a packet having a predetermined PID is extracted and recorded in sector units.
It may be a CC unit, a cluster unit, a track unit, a zone unit, or the like.

The recording medium in the present embodiment may be any recording medium such as a magnetic disk, a magnetic tape, an optical disk, and a semiconductor memory.

(Embodiment 5) Embodiment 5 of the present invention will be described with reference to FIG. FIG. 10 shows packet synthesizing means 1002, reference time generating means 1003, system control means 1005, time information checking means 1006, 1007, 1
008, buffer means 1009, 1010, 1011,
FIG. 13 is a block diagram showing a configuration of a stream reproducing apparatus from a selector 1012, a signal processor 1013, and a recording medium 1014.

Here, it is assumed that data is recorded on the recording medium 1014 by the stream recording device of the first embodiment. That is, it is assumed that a TS packet group of video data, audio data, and additional data is recorded for each predetermined unit. It is also assumed that time information is added to each TS packet.

The data read from the recording medium 1014 is subjected to demodulation, ECC and other processing by the signal processing means 1013 and then input to the selector means 1012. In the selector means 1012, the input data is
Output to the buffer means 1009, 1010, 1011 for each ID. Here, for example, the video TS packet is output to the buffer A1009, the audio TS packet is output to the buffer B1010, and the additional data TS packet is output to the buffer C1011. Here, the determination of the output destination buffer in the selector unit 1012 may be made by inspecting the PID in the TS packet, or it may be determined in advance which area of the recording medium has which PID data. If information is available, it may be determined using that information. In the latter case, the order of reproduction from the recording medium 1014 is determined by the system control unit 1005.

Buffer means 1009, 1010, 101
1 is input to the time checking unit 100.
6, 1007 and 1008 respectively.
For example, the time checking unit A1006 is the reference time generating unit 1
From 003, a reference time is obtained. Here, reference time generation means 1
003 is for generating a reference time for reading a TS packet. When the time information attached to the TS packet read from the buffer means A1009 matches the reference time obtained from the reference time generation means 1003, the time inspection means A1006 removes the time information and outputs only the TS packet to the packet synthesis means 1002. I do. The operations of the time information checking means B1007 and the time information checking means C1008 are the same as those of the time information checking means A1006. Thus, the video TS packet from the time information checking means A 1006, the audio TS packet from the time information checking means B 1007, the additional data TS packet from the time information checking means C 1008,
2 is output.

Here, the recording medium 1014 has the format shown in FIG.
Assuming that the transport stream (TS) of (a) is recorded by the stream recording apparatus of the first embodiment, the TS packets input to the packet combining means 1002 and their timings are shown in FIGS. )become that way. 2B shows the timing of a video TS packet input from the time information checking means A1006, FIG. 2C shows the timing of an audio TS packet input from the time information checking means B1007, and FIG. This is the timing of the additional data TS packet input from the inspection unit C1008.

The packet synthesizing means 1002 synthesizes the TS packets input from the time information inspecting means 1006, 1007, 1008 in the order of input to generate and output a TS. By this combination, a TS as shown in FIG. 2A is generated.

The T output from the packet combining means 1002
S may be decoded by a TS decoder (not shown), for example, or may be output to a set-top box or the like via a digital interface or the like.

As described above, the stream reproducing apparatus of the present invention reproduces the TS packet recorded for each PID for each predetermined unit of the recording medium, and, based on the time information attached to the TS packet, The transport stream (TS) is generated by rearranging the packets in the order of the packets.

Therefore, by using the stream reproducing apparatus of the present invention, it is possible to use the stream recording apparatus or the like according to the first embodiment of the present invention to change the original order of the TS packets in the TS and record them. Even if there is, at the time of reproduction, it is possible to generate a TS that returns to the original TS packet order. Thus, if this TS is input to a decoder or the like, it can be correctly decoded.

In the fifth embodiment, the case has been described where the TS includes video data, audio data, and additional data. However, this may include other data.

In the present embodiment, the case where reproduction is performed from the recording medium recorded by the stream recording device of the first embodiment has been described. However, this is the case where reproduction is performed from the recording medium recorded by the stream recording device of the second embodiment. The same applies to the case where

Further, the recording medium in the present embodiment may be any recording medium such as a magnetic disk, a magnetic tape, an optical disk, a semiconductor memory, and the like.

[0090]

As described above, according to the first embodiment, the stream recording apparatus of the present invention separates an input TS for each data specified by a packet identifier (PID), and separates each data. Recording is performed on a recording medium for each predetermined unit (for example, sector).

Therefore, by using the stream recording apparatus of the present invention, the same recording unit (for example, sector)
Only data having the same PID is recorded therein. Therefore, when only data having a predetermined PID is deleted after recording, a free area can be effectively generated.

Further, according to the second embodiment, the stream recording device of the present invention extracts a TS packet having a designated PID from an input TS. Then, the TS packet sequence having the designated PID and the TS packet sequence having no designated PID are separately recorded. Here, the unit of separation may be a sector unit or may be recorded in another area.

Therefore, by using the stream recording apparatus of the present invention, a TS packet sequence having a predetermined PID is recorded in a different sector or area from other TS packet sequences, and after recording, a predetermined PID is recorded. When only the data having the predetermined PID is deleted, or when the data other than the data having the predetermined PID is deleted, the empty area can be effectively generated.

According to the third embodiment, the stream editing apparatus of the present invention extracts a TS packet having a specified PID from a TS recorded on a recording medium.
Then, the TS packet sequence having the designated PID is recorded on the recording medium.

Therefore, by using the stream editing apparatus of the present invention, when it is desired to delete data other than the packet sequence having a predetermined PID from the TS, the original TS
It is not necessary to leave the sector in which the packet of the predetermined PID is recorded. That is, all the original TSs are deleted,
What is necessary is just to leave a newly generated packet sequence having a predetermined PID. Therefore, an empty area can be effectively generated.

Further, according to the fourth embodiment, the stream editing apparatus of the present invention extracts sector data including a TS packet having a specified PID from a TS recorded on a recording medium. Then, the extracted data is recorded on a recording medium.

Therefore, by using the stream editing apparatus of the present invention, when data other than the sector including the packet having the predetermined PID is to be erased from the TS, the sector data to be left is continuously recorded. be able to. Therefore, when the TS data is erased, a continuous empty area can be secured, and the empty area can be effectively generated.

Further, according to the fifth embodiment, the stream reproducing apparatus of the present invention is recorded by the stream recording apparatus according to the first or second embodiment of the present invention for each predetermined unit of the recording medium for each PID. The TS packet is reproduced, and the transport stream (T
S) is generated.

Therefore, by using the stream reproducing apparatus of the present invention, the original order in the TS packet in the TS is changed and recorded using the stream recording apparatus according to the first or second embodiment of the present invention. Even if
At the time of reproduction, it is possible to generate a TS that returns to the original TS packet order. Thus, if this TS is input to a decoder or the like, it can be correctly decoded.

[Brief description of the drawings]

FIG. 1 is a block diagram for explaining an embodiment of the present invention;

FIG. 2 is a schematic diagram for explaining an embodiment of the present invention.

FIG. 3 is a schematic diagram for explaining an embodiment of the present invention.

FIG. 4 is a schematic diagram for explaining an embodiment of the present invention.

FIG. 5 is a schematic view for explaining an embodiment of the present invention.

FIG. 6 is a block diagram for explaining an embodiment of the present invention;

FIG. 7 is a block diagram illustrating an embodiment of the present invention.

FIG. 8 is a schematic diagram for explaining an embodiment of the present invention.

FIG. 9 is a schematic diagram for explaining a conventional example.

FIG. 10 is a block diagram illustrating an embodiment of the present invention.

[Explanation of symbols]

 102 packet separation means 103 reference time generation means 104 PAT / PMT decoder 105 system control means 106, 107, 108 time information addition means 109, 110, 111 buffer means 112 selector means 113 signal processing means 114 recording medium

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/91 H04N 5/93 C 5/765 G11B 27/02 K 5/937 F-term (Reference) 5C053 FA14 FA20 FA23 GB06 GB11 GB21 GB38 HA33 JA03 JA12 JA16 JA22 KA04 LA07 5C063 AA20 AB03 AB07 AB11 AC01 AC05 CA23 DA07 DA13 DA20 5D044 AB05 AB07 BC01 BC06 CC04 DE12 DE38 DE49 DE96 EF03 EF05 FG18 HL14 5D110 AA13 AA37A19 A19A19A19A19A19A19A19A19A19A19A18 CC03 CC04 CK02 CK24

Claims (18)

[Claims] 1. A packet separation unit for separating an input transport stream (TS) into packets having the same packet identifier, and a packet sequence for each packet identifier output from the packet separation unit is temporarily stored for each packet sequence. A stream recording apparatus, comprising: buffer means for accumulating data; and system control means for taking out data from the buffer means and controlling to record data having the same packet identifier for each predetermined unit of a recording medium. 2. The stream recording apparatus according to claim 1, wherein the predetermined unit is one sector, one cluster, one ECC unit, one track or one zone. 3. The stream recording apparatus according to claim 1, wherein the recording medium is an optical disk or a magnetic disk. 4. A packet separating means for separating an input transport stream (TS) into a first packet having a predetermined packet identifier and a second packet not having the predetermined packet identifier. First buffer means for temporarily storing the first packet output from the packet separation means; second buffer means for temporarily storing the second packet output from the packet separation means; And retrieve data from the second buffer means,
A stream recording apparatus, comprising: system control means for controlling data fetched from the first and second buffer means to be recorded in different areas on a recording medium. 5. The stream recording apparatus according to claim 4, wherein the area on the recording medium is in units of one sector, one cluster, one ECC, one track, or one zone. 6. The stream recording apparatus according to claim 4, wherein said recording medium is an optical disk or a magnetic disk. 7. A data reproducing unit for reading a transport stream (TS) recorded on a recording medium, and a TS output from the reproducing unit as an input,
Stream editing comprising: packet extraction means for extracting and outputting a packet having a predetermined packet identifier from a packet; and data recording means for recording the packet output from the packet extraction means on the recording medium. apparatus. 8. A data reproducing means for reading a transport stream (TS) recorded on a recording medium, and a TS output from the reproducing means as an input.
Packet extracting means for extracting and outputting a packet having a predetermined packet identifier from the packet, and recording the packet output from the packet extracting means in an area on the recording medium different from the area where the TS is recorded. A stream editing device comprising: a data recording unit. 9. A data reproducing unit for reading a transport stream (TS) recorded on a first recording medium, and a TS output from the reproducing unit as an input,
A packet extracting unit that extracts and outputs a packet having a predetermined packet identifier from a packet, and a data recording unit that records the packet output from the packet extracting unit on a second recording medium. Stream editing device. 10. A data reproducing means for reading a transport stream (TS) recorded on a recording medium, and a TS output from the reproducing means as an input.
A data extracting means for extracting and outputting a predetermined unit of data including a packet having a predetermined packet identifier from the data, and a data recording means for recording the data output from the data extracting means on the recording medium. A stream editing device characterized by the above-mentioned. 11. A data reproducing unit for reading a transport stream (TS) recorded on a recording medium, and a TS output from the reproducing unit as an input.
A data extraction unit for extracting and outputting a predetermined unit of data including a packet having a predetermined packet identifier from an area; and an area on the recording medium where the TS is recorded on the recording medium. Recording means for recording in an area different from the stream editing apparatus. 12. A data reproducing means for reading a transport stream (TS) recorded on a first recording medium, and a TS output from said reproducing means as an input.
A data extraction unit for extracting and outputting data of a predetermined unit including a packet having a predetermined packet identifier from a data storage unit, and a recording unit for recording the data output from the data extraction unit on a second recording medium A stream editing device characterized by the above-mentioned. 13. The stream editing apparatus according to claim 10, wherein the predetermined unit is one sector, one cluster, one ECC unit, one track or one zone. 14. A reproducing means for reproducing the packet from a recording medium on which a packet is recorded for each packet identifier for each predetermined unit, a selector means for separating the packet reproduced by the reproducing means for each packet identifier, Buffer means for temporarily storing a packet sequence for each packet identifier output by the selector means for each packet sequence; reference time generating means for generating a reference time; reading a packet from the buffer means; and a time associated with the packet A stream reproducing apparatus comprising: a time information inspecting unit that outputs the packet when information matches the reference time; and a packet combining unit that combines the packets output from the time information inspecting unit in the output order. 15. The stream reproducing apparatus according to claim 14, wherein the predetermined unit is one sector, one cluster, one ECC unit, one track or one zone. 16. The stream reproducing apparatus according to claim 14, wherein the recording medium is a recording medium recorded by the stream recording apparatus according to claim 1 or 4. 17. A recording medium characterized by recording only packets having the same packet identifier in a transport stream (TS) in a predetermined unit. 18. The recording medium according to claim 17, wherein said predetermined unit is one sector, one cluster, one ECC unit, one track or one zone.