JP2003052017A - Av data recorder and its method, disk recorded thereby, av data reproducer and its method for reproducing the same disk and av data recorder/reproducer and its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an AV data recorder/reproducer and its method capable of easily recording and reproducing a video in a real time through a 1394 interface. SOLUTION: Input time information related with one or more transport packets is stored in another transport packet. The pertinent transport packet and the other transport packet having the input time information related with the pertinent transport packet are both recorded. The pertinent transport packet and the other transport packet recorded in the recording medium are read. The other transport packet corresponding to one or more recorded transport packets is extracted. The input time of the transport packet is specified. The corresponding transport packet is outputted based on the input time information.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AV data recording / reproducing apparatus and method for recording / reproducing video and audio in real time via a digital interface using a recording medium such as an optical disk.

[0002]

2. Description of the Related Art As a method of compressing video at a low bit rate, the MPEG2 standard (ISO / IEC 13818) is used.
There are system streams specified in -1). The system stream includes a program stream (P
S), transport stream (TS), and PES
Three types of streams are specified.

On the other hand, optical discs such as DVD-RAM and MO have been attracting attention as a video recording medium replacing the magnetic tape. FIG. 4 shows a block diagram of a conventional real-time video recording / reproducing apparatus using a DVD-RAM disk. Here, a case of recording and reproducing a video signal via the 1394 interface will be described.

In FIG. 4, a transport stream including a video signal input from the 1394 interface section 1 is converted into a program stream by a TS / PS converting section, and a DVD-recording section 5 and a pickup 12 are used to convert the transport stream.
Write to RAM disk 30.

During reproduction, the pickup 12 and the reproduction section 6
Program stream read via the PS / TS
It is converted into a transport stream and is output to an external device via the output timing adjusting unit 21.

At the time of recording, the recording control unit 8 controls the recording unit 5. Further, the continuous data area detection unit 7 checks the usage status of the sector managed by the logical block management unit 10 according to the instruction of the recording control unit 8 and detects a physically continuous free area.

When deleting the recorded video signal file, the deletion control section 8 controls the recording section 5 and the reproduction section 6 to carry out the deletion process.

Further, FIG. 5 shows a recording format for recording an image on a DVD-RAM in real time. D
VD-RAM consists of 2 Kbyte sectors,
Each sector is treated as one logical block, an error correction code is added to each logical block, and the DVD-R
Record to AM. Further, a logical block that is physically continuous for 11 seconds or more at the maximum recording rate is secured as one continuous data area, and MP for 0.4 to 1 second is stored in this area.
Unit video packet (Video) consisting of EG stream
o OBJECT UNIT: Hereinafter referred to as "VOBU". ) Are recorded in order. One VOBU is composed of packs, which are lower layers of the MPEG program stream in units of 2 Kbytes. The pack includes a video pack (V_PCK) that stores compressed video data and an audio pack (A_PCK) that stores compressed audio data.
It is composed of two types. Also, in one VOBU,
All V_PCKs for the corresponding time are included. Further, one VOBU includes all A_PCKs including audio frames that are necessary for timing. That is, the video frame and the audio frame are completed in the VOBU.

The continuous data area detecting unit 7 of the AV data recording / reproducing apparatus re-detects the next continuous data area when the remaining one continuous data area is less than 3 seconds in terms of the maximum recording rate. Then, when one continuous data area becomes full, writing is performed in the next continuous data area.

Further, in FIG. 6, the recorded contents on the DVD-RAM are UDF (Universal Disk Format).
t) File system or ISO / IEC 133
46 (Volume and file structure of write- once and
rewritable media using non-sequential recording fo
FIG. 4 is a diagram showing a state managed by a file system. In FIG. 6, one continuously recorded MPEG program stream has a file VR_MOVIE. Recorded as VRO. In this file, the file name and the position of the file entry are FID (File Identifier).
It is managed by the Descriptor). Then, the file name is VR_ in the file identifier field.
MOVIE. It is set as VRO, and the position of the file entry is set in the ICB column as the head sector number of the file entry.

The UDF standard is ISO / IEC 13
This corresponds to the implementation contract of the 346 standard. Also, DVD-RA
M drive to 1394 interface and SBP-2
UDF by connecting to a PC via the (Serial Bus Protocol-2) protocol
Files written in a format that conforms to can be handled as one file from a personal computer.

Further, the file entry manages the continuous data areas a, b, c in which data is stored using the allocation descriptor. Specifically, when the recording control unit 8 finds a defective logical block during recording in the continuous data area a, the logical block is skipped and writing is continued from the beginning of the continuous data area b. next,
When the recording controller 8 detects that the recording area of the PC file collides with the recording area of the continuous data area b, the writing is continued from the beginning of the continuous data area c. As a result, the file VR_MOVIE. The VRO is composed of continuous data areas a, b and c.

FIG. 7 shows an example of the structure of the allocation descriptor. FIG. 7A shows a short allocation descriptor and FIG. 7B shows a format of the extended allocation descriptor. The extent length indicates the data size in bytes, and the extent position indicates the starting sector number of the data. The record length indicates the actually recorded data size in bytes. The information length indicates the data size before compression in bytes when the data is compressed. The usable area is an area that can be freely used.

As a description rule of the allocation descriptor, the start position of the data referred to by the allocation descriptors a, b and c in FIG. 6 coincides with the head of the sector, and the allocation descriptor a other than the last allocation descriptor c, The extent length of the data referred to by b must be an integral multiple of 1 sector. By using the record length of the extended allocation descriptor, it is possible to avoid the constraint that the effective data length is an integral multiple of one sector, and to arrange the effective data of the extent length or less.

The extended allocation descriptor is permitted in the UDF standard, but is not permitted in the UDF subset standard (UDF-Bridge) adopted by the DVD-ROM. The type of allocation descriptor is described in the file entry.

The data size of one VOBU is
If the video is a variable bit rate, it varies within the maximum recording rate. VO if the video is a constant bit rate
The data size of BU is almost constant.

When the recorded contents are reproduced, the DVD-RA
The reading of data from the phase change optical disk such as the M disk and the output of the read data are simultaneously performed. At this time, the data read speed is set to be higher than the data output speed, and control is performed so that the data to be reproduced does not run out. Therefore, if continuous data reading and continuous data output are continued, it is possible to secure extra data to be output by the speed difference between the data reading speed and the data output speed. Continuous reproduction can be realized by using such extraly secured data as output data while the data reading is interrupted by the jump of the pickup.

Specifically, the data read speed is 11M.
When the bps, the data output speed is 8 Mbps at the maximum, and the maximum movement time of the pickup is 3 seconds, 24 Mbits of extra data during movement of the pickup are required as extra output data. To secure such extra data,
Continuous reading for 8 seconds is required. That is, it is necessary to continuously read out 24 Mbits for a time obtained by dividing the data read speed of 11 Mbps and the data output speed of 8 Mbps.

Therefore, since 88 Mbits of output data, that is, 11 seconds of output data is read during 8 seconds of continuous reading, continuous data reproduction is guaranteed by securing a continuous data area of 11 seconds or more. It becomes possible to do.

There may be several defective logical blocks in the middle of the continuous data area. However, in this case, it is necessary to secure the continuous data area slightly larger than 11 seconds in anticipation of the read time required for reading the defective logical block required during reproduction.

[0021]

The AV equipment in the future is I
The EEE1394 digital interface tends to be standard equipment. However, as the video synchronous communication protocol on the IEEE 1394 interface, only the MPEG transport stream is specified.

Therefore, in the conventional AV data recording apparatus and AV data recording / reproducing apparatus, the video is transferred to IEEE1.
When transmitting and recording to a D-VHS or a set top box (STB) via a digital interface of 394, it is necessary to first convert the MPEG program stream into a PES stream and then to an MPEG transport stream, which is complicated. A conversion system was needed. The same was true in the opposite case.

In addition, when a transport stream having various details is recorded in a program stream format through a complicated conversion system and then the recorded content is output to another device in a transport stream format. In addition, it is technically difficult to completely match the transport stream input to the recording device with the transport stream output from the recording device.

In order to solve these problems, a method of adding a 4-byte time stamp in the transport packet unit can be considered. However, this method has a problem that the packet length becomes 192 bytes, and the packet does not comply with the transport stream of the MPEG2 system standard.

On the other hand, a method of recording the transport packet as it is can be considered. However, with this method, the output timing needs to be calculated based on the packet size of the receiving side when outputting to the outside, so it is necessary to know in advance the information about the buffer size of the receiving side expected by the transport packet. There was a problem.

In order to solve the above problems, the present invention provides
Video recording apparatus or video recording / reproducing apparatus capable of easily performing real-time recording and real-time reproduction of an image with a D-VHS or a set top box (STB) via an IEEE 1394 digital interface, and methods thereof. For the realization of.

Another object of the present invention is to realize a recording mode in which the recorded contents on a recording medium can be easily viewed as a data file conforming to the MPEG standard when a personal computer is connected.

A further object of the present invention is to record an input transport stream in a format that is easy to send, when it is sent from the middle of the transport stream to the outside.

As described above, the present invention guarantees real-time reproduction including reproduction from the middle using the synchronous transfer means of video and audio via the digital interface, and reproduces the file using the asynchronous transfer means when the personal computer is connected. It is also an object of the present invention to realize a recording method that can easily achieve both of guarantee (it becomes reproducible when a file conforms to the MPEG standard).

[0030]

In order to achieve the above object, an AV data recording apparatus according to the present invention relates to a packet input section for inputting a packet having a predetermined data structure and at least an input time of the input packet. An information generation unit that stores information about one or a plurality of packets including information in another packet having the same data structure,
The recording unit has one or a plurality of packets and a recording unit that records another packet having information about the packet, and the recording unit records one or a plurality of packets and another packet having information about the packet together. It is characterized by

In order to achieve the above object, the AV data recording apparatus according to the present invention has a packet input section for inputting a packet having a predetermined data structure, and input time information regarding one or a plurality of input packets. Is stored in another packet having the same data structure, one or a plurality of packets, and a recording unit that records another packet having input time information regarding the packet. , One or a plurality of packets and other packets having input time information regarding the packets are recorded together.

With this configuration, when performing real-time recording / reproduction of a packet including a video via the 1394 interface, it is not necessary to perform a special conversion process, so that it can be easily realized. Become. Further, during reproduction, continuous reproduction can be guaranteed by completely reproducing the packet transmission timing.

Further, in order to achieve the above object, the AV data recording apparatus according to the present invention is such that a transport packet input section and input time information relating to one or a plurality of input transport packets are transferred to another transport packet. A time information generation unit that stores the packet, one or a plurality of transport packets, and a recording unit that records another transport packet having input time information regarding the transport packet, and the recording unit is one or It is characterized in that a plurality of transport packets and another transport packet having input time information are recorded together.

With this configuration, when performing real-time recording / real-time reproduction of the transport stream including the video through the 1394 interface, it is not necessary to perform a special stream conversion process, so that it can be easily realized. Is possible. Further, during reproduction, it is possible to guarantee continuous reproduction by completely reproducing the transmission timing of transport packets. Furthermore, it is possible to efficiently realize that the file recorded when the personal computer is connected is viewed as a stream conforming to the MPEG standard.

Further, in the AV data recording apparatus according to the present invention, the time information generating section stores a predetermined number of input time information in another transport packet, and the recording section records a predetermined number of transport packets. It is preferable to record one or a plurality of corresponding transport packets immediately after or immediately before another transport packet having the input time information regarding the packet. This is because the seek operation when referring to the time information can be minimized. Also, the recording position of the transport packet that stores the time information can be simplified.

Further, in the AV data recording apparatus according to the present invention, the recording unit records the corresponding transport packet immediately after or immediately before another transport packet having the input time information regarding each transport packet. It is preferable. This is because each transport packet can be reproduced most efficiently at the time of reproduction. Also, the recording position of the transport packet that stores the time information can be simplified.

Further, in the AV data recording apparatus according to the present invention, when the input time information regarding a plurality of transport packets is stored in another transport packet in the time information generating section, the input time information is compressed. It is preferable to store it. This is because it is possible to secure a large recording area for the AV data itself and to improve the recording efficiency of the transport packet itself.

Further, in the AV data recording apparatus according to the present invention, when the time information generating unit stores the input time information regarding a plurality of transport packets in another transport packet, the input time information is variable in length. It is preferably stored as data. This is because, since the input time information is variable length data, the area in which the AV data cannot be recorded in the recording area of the transport packet can be minimized, and the recording efficiency of the transport packet itself is improved.

Further, in the AV data recording apparatus according to the present invention, when the time information generating section stores the input time information regarding a plurality of transport packets in another transport packet, the input time information is continuous. If they are equal to each other, it is preferable to store the continuous count as the input time information. This is because it is possible to reduce the area in which the AV data cannot be recorded in the recording area of the transport packet, and to further improve the recording efficiency of the transport packet itself.

Further, in the AV data recording apparatus according to the present invention, when the time information generating section stores the input time information regarding a plurality of transport packets in another transport packet, the difference between the two input times is obtained. It is preferable to store the value as the input time information. This is because it is possible to reduce the area in which the AV data cannot be recorded in the recording area of the transport packet, and to further improve the recording efficiency of the transport packet itself.

Also, in the AV data recording apparatus according to the present invention, when the time information generating unit stores the input time information regarding a plurality of transport packets in another transport packet, the difference between the two input times is obtained. It is preferable to store a value obtained by subtracting a predetermined numerical value from the value as the input time information. This is because it is possible to reduce the area in which the AV data cannot be recorded in the recording area of the transport packet, and to further improve the recording efficiency of the transport packet itself.

Further, in the AV data recording apparatus according to the present invention, in the case where the time information generating unit stores the input time information relating to a plurality of transport packets in another transport packet, the difference between the two input times. It is preferable that a value obtained by subtracting a predetermined numerical value from the value is stored as the input time information, and is stored in the transport packet together with the predetermined numerical value. This is because it is possible to reduce the area in which the AV data cannot be recorded in the recording area of the transport packet, and to further improve the recording efficiency of the transport packet itself.

Further, in the AV data recording apparatus according to the present invention, it is preferable that the time information generating unit sets the average value of the difference values in the other transport packets generated in the past to a predetermined numerical value.

Further, in the AV data recording apparatus according to the present invention, it is preferable that the time information generating unit sets the value corresponding to the bit rate of the input transport packet to a predetermined numerical value.

Further, in the AV data recording apparatus according to the present invention, in the time information generating section, the input time information for the transport packet including the head portion of the decoding unit of the specific elementary stream is stored in another transport packet. It is preferable to store it as the input time information located substantially at the beginning. When starting reproduction from any decoding unit in stream data such as video, the input time information is present immediately before, for example, so that it is not necessary to perform a search process of the input time information itself, and more efficient real time This is because reproduction can be performed.

Further, in the AV data recording apparatus according to the present invention, in the time information generation unit, the input time information for the transport packet including the head portion of the video decoding unit is positioned at the head of another transport packet. It is preferable to store it as input time information. When starting the reproduction from any decoding unit in the video, it is not necessary to perform a search process of the input time information itself, because the input time information will exist immediately before, for example.
This is because real-time reproduction can be performed more efficiently.

Further, in the AV data recording apparatus according to the present invention, in the time information generation unit, the input time information for the transport packet including the head portion of the sequence header of the video is located at the head of another transport packet. It is preferable to store it as input time information.
When starting playback from any sequence header in the video, it is not necessary to search for the input time information itself because the input time information will exist immediately before, for example, and real-time playback can be performed more efficiently. Because you can

Further, in the AV data recording apparatus according to the present invention, in the time information generating section, the input time information for the transport packet further including the program association table is located at the approximate beginning of other transport packets. It is preferable to store it as input time information. When starting playback from any program association table in the video, there is no need to perform a search process of the input time information itself, since the input time information will exist immediately before, for example.
This is because real-time reproduction can be performed more efficiently.

Further, in the AV data recording apparatus according to the present invention, in the time information generating section, the input time information for the transport packet further including the GOP header of the video is input at a position approximately at the beginning of another transport packet. It is preferable to store it as time information. No matter which GOP header in the video is to be played back, the input time information is present immediately before, so that it is not necessary to search for the input time information itself, and the real-time playback can be performed more efficiently. Because you can

Further, in the AV data recording apparatus according to the present invention, in the time information generation unit, the input time information for the transport packet including the head portion of the audio decoding unit is positioned at the head of another transport packet. It is preferable to store it as input time information. When starting playback from any audio frame in the audio stream, it is not necessary to search for the input time information itself, since the input time information will exist immediately before, for example, and real-time playback can be performed more efficiently. Because you can.

Further, in the AV data recording apparatus according to the present invention, in the time information generation unit, the input time information for the transport packet including the head portion of the decoding unit of the data broadcast stream is transferred to the head of another transport packet. It is preferable to store it as input time information located at. When starting the data reproduction from any data decoding unit in the video, since the input time information is present immediately before, for example, there is no need to perform a search process of the input time information itself, and the real time reproduction can be performed more efficiently. Because it can be done.

Further, in the AV data recording apparatus according to the present invention, it is preferable that the transport packet input section removes another transport packet having the input time information. This is to prevent the input time information from being redundantly recorded.

Further, in the AV data recording apparatus according to the present invention, it is preferable that the time information generating unit stores the input time information in the payload area of the null packet. This is because the storage location of the input time information becomes clear according to the standard.

Further, in the AV data recording apparatus according to the present invention, it is preferable that the time information generating unit stores the number of transport packets in which the input time information is not stored in another transport packet. This is because the transport packet in which the input time information is not stored can be skipped, and unnatural reproduction at the joint of AV data can be prevented.

Next, in order to achieve the above object, the AV data recording apparatus according to the present invention comprises a transport packet generator and input time information relating to one or a plurality of transport packets input from the transport packet generator. With a time information generation unit that stores the transport packet in another transport packet, one or more transport packets, and a recording unit that records another transport packet having input time information regarding the transport packet, The recording unit records one or a plurality of transport packets together with another transport packet having the input time information, and the time information generation unit records the input time of the two transport packets as the input time information. The value obtained by subtracting a predetermined value from the difference value is stored as input time information and Packet generating unit, and generates a transport packet at substantially equal intervals.

With such a configuration, when the real-time reproduction of the transport stream including the video is performed through the 1394 interface, it is not necessary to perform a special stream conversion process, and only the continuous reproduction can be guaranteed. Since the data amount of the input time information itself can be compressed to about ⅕, the area where AV data cannot be recorded can be further reduced, and the recording efficiency of AV data can be further improved.

In order to achieve the above object, the AV data reproducing apparatus according to the present invention has a reading unit for reading a packet having a predetermined data structure recorded on a recording medium, and a recording unit for recording the packet on the recording medium. The time information extraction for identifying the packet input time by extracting one other packet in which a predetermined number of pieces of information regarding one or a plurality of packets including at least information about the packet input time are collectively recorded. It is characterized in that it has a unit and an output unit for outputting a packet, and the output unit outputs the corresponding packet based on information about the packet.

Further, in order to achieve the above object, the AV data reproducing apparatus according to the present invention is recorded on the recording medium, and a reading section for reading out a packet having a predetermined data structure recorded on the recording medium. A time information extraction unit that extracts one other packet in which a predetermined number of pieces of input time information regarding one or more packets are collectively recorded and specifies the input time of the packet, and an output unit that outputs the packet And the output unit outputs the corresponding packet based on the input time information about the packet.

With such a configuration, when the packet including the video and the like is reproduced in real time through the 1394 interface, it is not necessary to perform a special conversion process, and the transmission timing of the original packet is completely reproduced. By doing so, continuous playback can be guaranteed.

Further, in order to achieve the above object, the AV data reproducing apparatus according to the present invention comprises a reading unit for reading a transport packet recorded in a recording medium, and one or a plurality of recorded transport packets. A predetermined number of input time information regarding packets are collectively recorded, and one other transport packet is extracted,
A time information extraction unit that specifies the input time of the transport packet and an output unit that outputs the transport packet. The output unit outputs the corresponding transport packet based on the input time information of the transport packet. Is characterized by.

With this configuration, when the real-time reproduction of the transport stream including the video is performed via the 1394 interface, it is not necessary to perform a special stream conversion process, and the transmission timing of the original transport stream can be controlled. By completely reproducing, continuous reproduction can be guaranteed.

Further, in the AV data reproducing apparatus according to the present invention, in the output section, based on the input time information, the transport packet positioned behind or in front of another transport packet containing the input time information is used. It is preferable to output the packet. This is to minimize the seek operation.

Further, in the AV data reproducing apparatus according to the present invention, it is preferable that the output section also outputs other transport packets which collectively record the input time information.

Further, in the AV data reproducing apparatus according to the present invention, it is preferable that the time information extracting section extracts the input time information regarding the plurality of compressed and stored transport packets. This is because real-time reproduction can be performed more easily.

Further, in the AV data reproducing apparatus according to the present invention, it is preferable that the time information extracting section extracts the input time information regarding the plurality of transport packets stored as the variable length data. This is because, since the input time information is variable-length data, the area in which the AV data cannot be recorded in the recording area of the transport packet can be minimized and real-time reproduction can be performed more easily.

Further, in the AV data reproducing apparatus according to the present invention, it is preferable that the time information extracting unit extracts the consecutive number of times stored as the input time information when the input time information is continuously equal. This is because the recording efficiency of the transport packet itself is further improved, so that real-time reproduction can be performed more easily.

Further, in the AV data reproducing apparatus according to the present invention, it is preferable that the time information extracting section extracts the difference value between the two input times stored as the input time information. This is because the recording efficiency of the transport packet itself is further improved, so that real-time reproduction can be performed more easily.

Further, in the AV data reproducing apparatus according to the present invention, it is preferable that the time information extracting section extracts a value obtained by subtracting a predetermined numerical value from a difference value between two input times stored as the input time information. This is because the recording efficiency of the transport packet itself is further improved, so that real-time reproduction can be performed more easily.

Further, in the AV data reproducing apparatus according to the present invention, the time information extracting unit stores the value obtained by subtracting a predetermined numerical value from the difference value between the two input times stored as the input time information, and the transport packet. It is preferable to extract the determined predetermined numerical value. This is because the recording efficiency of the transport packet itself is further improved, so that real-time reproduction can be performed more easily.

Further, in the AV data reproducing apparatus according to the present invention, it is preferable that the time information extracting unit sets the average value of the difference values in other transport packets generated in the past to a predetermined value.

Further, in the AV data reproducing apparatus according to the present invention, it is preferable that the time information extracting unit sets the value corresponding to the bit rate of the input transport packet to a predetermined numerical value.

Further, in the AV data reproducing apparatus according to the present invention, in the time information extracting unit, the decoding unit of the specific elementary stream stored as the input time information located at the almost head of another transport packet It is preferable to extract the input time information for the transport packet including the beginning part of the. When starting playback from any decoding unit in stream data such as video, the input time information is present immediately before, so there is no need to search the input time information itself, and more efficient real-time playback Because you can do it.

Further, in the AV data reproducing apparatus according to the present invention, the time information extracting section stores the head part of the video decoding unit stored as the input time information located at the head of another transport packet. It is preferable to extract the input time information for the transport packet that includes the input packet. No matter which decoding unit in the video is played back, the input time information is present immediately before, so there is no need to search for the input time information itself, and more efficient real-time playback is possible. Because you can.

Further, in the AV data reproducing apparatus according to the present invention, the time information extraction unit stores the beginning portion of the sequence header of the video stored as the input time information located at the approximate beginning of another transport packet. It is preferable to extract the input time information for the transport packet that includes the input packet. When starting playback from any sequence header in the video, since the input time information is present immediately before, there is no need to search for the input time information itself, and real-time playback can be performed more efficiently. Because you can.

Further, in the AV data reproducing apparatus according to the present invention, in the time information extracting section, a trans- mission including a program association table stored as the input time information located at the head of another transport packet. It is also preferable to extract the input time information for the port packet. Which program in the video
Even when the reproduction is started from the association table, since the input time information is present immediately before, it is not necessary to search the input time information itself,
This is because real-time reproduction can be performed more efficiently.

Further, in the AV data reproducing apparatus according to the present invention, in the time information generating unit, the transport including the GOP header of the video stored as the input time information located at the head of another transport packet is included. It is preferable to also extract the input time information for the packet.
When starting reproduction from any GOP header in the video, since the input time information is present immediately before, it is not necessary to search the input time information itself, and more efficient real-time reproduction can be performed. Because you can.

Further, in the AV data reproducing apparatus according to the present invention, the time information extracting section stores the head portion of the audio decoding unit stored as the input time information located at the head of another transport packet. It is preferable to extract the input time information for the transport packet that includes the input packet. No matter which decoding unit in the audio stream the playback is started from, the input time information is present immediately before, so there is no need to search the input time information itself, and more efficient real-time playback is possible. Because you can

Further, in the AV data reproducing apparatus according to the present invention, the head of the decoding unit of the data broadcast stream stored as the input time information located at the head of another transport packet in the time information extracting unit. It is preferable to extract the input time information for the transport packet including the portion. When starting data reproduction from any data decoding unit in the video, since the input time information is present immediately before, there is no need to perform a search process of the input time information itself, and more efficient real-time reproduction is performed. Because you can.

Next, in order to achieve the above object, the AV data reproducing apparatus according to the present invention comprises a reading section for reading out transport packets recorded in a recording medium, and one or more recording sections recorded in the recording medium. Input time information regarding the transport packet of a predetermined number, the time information extraction unit that extracts one other transport packet and the output unit that outputs the transport packet. The other transport packets extracted by the time information extraction unit are ignored and output.

With this configuration, in the case of locally reproducing the transport stream including the video, the transport including the video already recorded on the recording medium is not affected by the input time information of the transport packet. It becomes possible to sequentially reproduce the port stream.

In order to achieve the above object, the AV data reproducing apparatus according to the present invention comprises a reading section for reading out transport packets recorded on a recording medium, and one or more recording sections recorded on the recording medium. Record the number of transport packets that do not store the input time information for each transport packet of the other transport packet and extract one other transport packet to identify the number of transport packets that do not store the input time information It is characterized in that it has an extraction unit and an output unit that outputs transport packets, and that the output unit does not output transport packets for which input time information is not stored based on the number.

With this configuration, when a real-time reproduction of a transport stream including video is performed via the 1394 interface, it is possible to skip the transport packet in which the input time information is not stored. It becomes possible to perform real-time reproduction without causing unnaturalness at the joint.

In order to achieve the above object, the AV data recording / reproducing apparatus according to the present invention provides a packet input section for inputting a packet having a predetermined data structure and at least information on the input time of the input packet. An information generation unit that stores information about one or a plurality of packets including the packet in another packet having the same data structure; a recording unit that records one or a plurality of packets and another packet that has information about the packet; A reading unit that reads out a packet recorded in the recording medium and other packets, and another packet corresponding to the one or more packets recorded in the recording medium are extracted to specify the input time of the packet. The recording unit has a time information extraction unit and an output unit that outputs packets. The recording unit includes one or more packets and information about the packets. Together record other packets having, at the output, and outputs a packet corresponding based on the information about the packet.

In order to achieve the above object, the AV data recording / reproducing apparatus according to the present invention has a packet input section for inputting a packet having a predetermined data structure and an input time for one or a plurality of input packets. Information is recorded on a recording medium, a time information generation unit that stores information in another packet having the same data structure, one or a plurality of packets, and a recording unit that records another packet having input time information regarding the packet. The reading unit that reads out a packet having a predetermined data structure and other packets, and other packets corresponding to one or more packets recorded on the recording medium are extracted to identify the packet input time. And a time information extraction unit for outputting a packet, and an output unit for outputting a packet. Other packets having time information together recorded, at the output, and outputs a packet corresponding based on the input time information about the packet.

With this configuration, when performing real-time recording / reproduction of a packet including a video through the 1394 interface, it is not necessary to perform a special packet conversion process, so that it can be easily realized. Becomes In addition, by completely reproducing the packet transmission timing during reproduction, continuous reproduction can be guaranteed.

Next, in order to achieve the above object, the AV data recording / reproducing apparatus according to the present invention uses a transport packet input section and other input time information relating to one or a plurality of input transport packets. A time information generation unit to be stored in a transport packet, one or more transport packets, and a recording unit to record another transport packet having input time information regarding the transport packet, and a recording medium. A read unit that reads out transport packets and other transport packets and another transport packet corresponding to one or more recorded transport packets are extracted to specify the input time of the transport packet. Time information extraction unit and output unit that outputs transport packets The recording unit records one or a plurality of transport packets and another transport packet having the input time information together, and the output unit records the corresponding transport packet based on the input time information of the transport packet. It is characterized by outputting a port packet.

With such a configuration, when carrying out real-time recording / real-time reproduction of a transport stream including a video via the 1394 interface, it is not necessary to perform a special stream conversion process, so that it can be easily realized. Is possible. Moreover, during reproduction, continuous reproduction can be guaranteed by completely reproducing the transmission timing of the transport stream.
In addition, the file recorded when the personal computer is connected is MPEG
It can be efficiently realized to make it appear as a stream conforming to the standard.

Next, in order to achieve the above object, the AV data recording method according to the present invention includes a step of inputting a packet having a predetermined data structure, and at least one information including the input time of the input packet. Storing information about a plurality of packets in another packet having the same data structure; one or more packets;
Recording another packet having information about the packet, and in the recording step, one or more packets and another packet having information about the packet are both recorded.

In order to achieve the above object, the AV data recording method according to the present invention comprises a step of inputting a packet having a predetermined data structure, and input time information regarding one or a plurality of input packets. The method includes storing in another packet having the same data structure, one or a plurality of packets, and recording another packet having input time information regarding the packet. And the other packet having the input time information regarding the packet are recorded together.

With this configuration, when performing real-time recording / reproduction of a packet including a video through the 1394 interface, it is not necessary to perform a special conversion process, and therefore it can be easily realized. Become. Further, during reproduction, continuous reproduction can be guaranteed by completely reproducing the packet transmission timing.

Further, in order to achieve the above-mentioned object, the AV data recording method according to the present invention comprises a step of inputting a transport packet, and a step of inputting input time information concerning one or a plurality of input transport packets to another. A transport packet; storing one or more transport packets; and recording another transport packet having input time information about the transport packet. One transport packet and another transport packet having input time information are recorded together.

With this configuration, when performing real-time recording / real-time reproduction of the transport stream including the video through the 1394 interface, it is not necessary to perform special stream conversion processing, so that it can be easily realized. Is possible. Further, during reproduction, it is possible to guarantee continuous reproduction by completely reproducing the transmission timing of transport packets. Furthermore, it is possible to efficiently realize that the file recorded when the personal computer is connected is viewed as a stream conforming to the MPEG standard.

Next, in order to achieve the above object, the AV data reproducing method according to the present invention comprises a step of reading a packet having a predetermined data structure recorded in a recording medium,
The packet input time is extracted by extracting one other packet recorded in a predetermined number of pieces of information about one or a plurality of packets, which includes at least information about the packet input time, recorded on the recording medium. And a step of outputting the packet, and in the outputting step, the corresponding packet is output based on the information about the packet.

Further, in order to achieve the above object, the AV data reproducing method according to the present invention comprises a step of reading a packet having a predetermined data structure recorded on a recording medium,
A step of extracting one other packet recorded in a predetermined number of pieces of input time information regarding one or a plurality of packets recorded in the recording medium to specify the input time of the packet; It has a step of outputting, and in the step of outputting, the corresponding packet is output based on the input time information about the packet.

With this configuration, when real-time reproduction of a packet containing a video or the like is performed via the 1394 interface, it is not necessary to perform special conversion processing, and the original packet transmission timing is completely reproduced. By doing so, continuous playback can be guaranteed.

Further, in order to achieve the above object, the AV data reproducing method according to the present invention comprises a step of reading a transport packet recorded on a recording medium and one or a plurality of recorded transport packets. Of the other transport packet recording the input time information regarding the input time information regarding the input time information, and specifying the input time of the transport packet, and outputting the transport packet. It is characterized in that the corresponding transport packet is output based on the input time information of the port packet.

With such a configuration, when the real-time reproduction of the transport stream including the video is performed through the 1394 interface, it is not necessary to perform a special stream conversion process, and the transmission timing of the original transport stream can be controlled. By completely reproducing, continuous reproduction can be guaranteed.

Next, in order to achieve the above object, the AV data recording / reproducing method according to the present invention includes a step of inputting a packet having a predetermined data structure and at least information about the input time of the input packet. Or storing information about a plurality of packets in another packet having the same data structure, recording one or more packets and another packet having information about the packets, and recording the information on a recording medium. Existing packets and other packets, extracting other packets corresponding to the one or more packets recorded on the recording medium, specifying the packet input time, and outputting the packets. In the recording step, one or a plurality of packets and other packets having information about the packets are stored together. Recorded and, in a step of outputting, and outputs a packet corresponding based on the information about the packet.

Further, in order to achieve the above object, the AV data recording / reproducing method according to the present invention includes a step of inputting a packet having a predetermined data structure, and input time information regarding one or a plurality of input packets. , Storing in another packet having the same data structure, recording one or more packets, and another packet having input time information regarding the packet, and a predetermined data structure recorded in the recording medium. Reading out a packet having a packet and another packet, and extracting another packet corresponding to one or a plurality of packets recorded on the recording medium,
A step of specifying an input time of the packet and a step of outputting the packet, and in the recording step, a step of recording and outputting one or more packets together with another packet having input time information regarding the packet. In (1), the corresponding packet is output based on the input time information regarding the packet.

With this configuration, when performing real-time recording / reproduction of a packet including a video through the 1394 interface, it is not necessary to perform a special packet conversion process, and therefore it can be easily realized. Becomes In addition, by completely reproducing the packet transmission timing during reproduction, continuous reproduction can be guaranteed.

Further, in order to achieve the above object, the AV data recording / reproducing method according to the present invention includes a step of inputting a transport packet, and a step of inputting time information concerning one or a plurality of input transport packets. In one transport packet, recording one or more transport packets, and another transport packet having input time information regarding the transport packet, and transport packets recorded in the recording medium. And a step of reading another transport packet, a step of extracting another transport packet corresponding to one or a plurality of recorded transport packets, and specifying an input time of the transport packet, There is a process to output and record the port packet. In the step of recording one and a plurality of transport packets and another transport packet having the input time information together and outputting the same, the corresponding transport packet is output based on the input time information of the transport packet. It is characterized by doing.

With such a configuration, when carrying out real-time recording / real-time reproduction of the transport stream including the video through the 1394 interface, it is not necessary to perform a special stream conversion process, so that it can be easily realized. Is possible. Moreover, during reproduction, continuous reproduction can be guaranteed by completely reproducing the transmission timing of the transport stream.
In addition, the file recorded when the personal computer is connected is MPEG
It can be efficiently realized to make it appear as a stream conforming to the standard.

The same effect can be expected for a recording medium represented by a disc or a memory card recorded by the AV data recording apparatus and method or the AV data recording / reproducing apparatus and method described above.

[0104]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings. 1 is a block diagram of an AV data recording / reproducing apparatus according to a first embodiment of the present invention. At the time of recording, the transport stream including the video signal input from the 1394 interface unit 1 is written to the phase change optical disk 11 via the delay unit 13, the MUX (Multiplex) unit 3, the recording unit 5, and the pickup 12. The T_TSP generator is 1
The time when the transport packet arrives at the 394 interface unit 1 is expressed as 4-byte time information, and
Five pieces of time information are assembled into one transport packet (hereinafter, the packet is referred to as "T_TSP"). In the MUX unit 3, T_TSP is set to the corresponding 45
Combining so that it is positioned before each transport packet. During reproduction, the transport stream read via the pickup 12 and the reproduction unit 6 is output to an external device via the output timing adjustment unit 21.

The output timing adjusting unit 21 uses the T_TSP
Is detected, the transmission timing is adjusted so that the transmission interval of the subsequent 45 transport packets becomes equal to the time interval between the time information recorded in T_TSP and output. Also, T_TSP itself is not output to an external device.

Further, at the time of recording, the recording control section 8 controls the recording section 5. The recording control unit 8 also causes the continuous data area detection unit 7 to detect a physically continuous empty area. The continuous data area detection unit 7 is a logical block management unit 1.
The availability of each logical block (and sector) managed by 0 is checked to detect a free area.

The recording unit 5 starts recording the transport packet from the position of the logical block number designated by the recording control unit 8. At this time, in the recording unit 5, the transport packet arriving in 1 second is 32K.
The data is divided into byte units, an error correction code is added to 32 Kbyte units, and recorded on the phase change optical disk 11 as one logical block.

When recording of transport packets for one second is completed in the middle of one logical block, recording of transport packets arriving in the next one second is continuously performed without opening a gap. .

On the other hand, the continuous data area detecting section 7
Before the recording by the recording unit 6 is started, a continuous free logical block area of 11 seconds or more is detected in advance by the maximum recording rate calculation. Then, the logical block number of the logical block area is notified to the recording unit 5 each time writing in logical block units occurs, and the logical block management unit 10 is notified that the logical block is used up.

The continuous data area detection unit 7 searches the usage status of the logical blocks managed in the logical block management unit, and finds unused logical blocks at the maximum rate of 11
The area that continues for seconds is detected. The data reading speed of the reproducing unit, the maximum data output speed via the 1394 interface unit 1, and the maximum moving time of the pickup are assumed to be the same as in the conventional example.

The logical block management unit 63 includes a recording control unit 6
The used state for each logical block number is grasped by the used logical block number notified from 1 and managed.
That is, the usage status of each sector forming the logical block number is determined by UDF or ISO / IEC 1334.
By using the space bit descriptor area defined by the file structure of No. 6, whether used or unused is recorded and managed. Then, in the final stage of the recording process, the FID and the file entry are written in the file management area on the disc.

Next, FIG. 2 is a diagram showing a recording form in the AV data recording apparatus according to the first embodiment of the present invention. In FIG. 2, the MPEG transport stream is composed of a plurality of transport packets that are continuous without a gap. The transport packet contains a video transport packet (V
_TSP), audio transport packet (A_TSP) in which audio data is stored, and time stamp transport packet (T_TSP), and the length of each transport packet is 188 bytes.

FIG. 3 shows the data structure of various transport packets according to the first embodiment of the present invention. Also,
V_TSP is composed of transport packet header and video data, A_TSP is composed of transport packet header and audio data, and T_TSP
Is the transport packet header, section header,
And 45 time stamps.

V_TSP, A_TSP, and T_TS
The distinction between Ps is the PID in the transport packet header.
It is identified by (Packet ID). As shown in FIG. 3, V_TSP has PID = “0x0020”, A_TS.
P is PID = "0x0021", and T_TSP is PI
It is identified by D = “0x1FFE”. The relationship between the transport packet for one second and the continuous data area, logical block, and sector is the same as the relationship between the VOBU and the continuous data area, logical block, and sector in FIG.

FIG. 11 is a block diagram of the T_TSP generator 2. In FIG. 11, from the input transport packet to the program clock reference (hereinafter, “PC
R ”. 2) PCR is extracted by the extraction unit 40, and
PLL (Phase Loc) for 7MHz oscillator
k Loop) circuit.

Then, the input timing measuring / boundary detecting section 41 measures the input timing of the transport packet in the clock value format by using the 27 MHz clock, and the lower 4 bits of the clock value for each transport packet are measured. T with byte as timestamp value
It will be passed to the _TSP assembly section 42.

When 45 time stamp values are accumulated in the T_TSP assembling section 42, one T_TSP is created and output, and at the same time, the transport packet corresponding to the 45 time stamp values is stored in the memory 43. To T
Instruct to output immediately after _TSP.

Further, when the T_TSP is temporarily terminated by detecting the specific boundary of the transport packet in the input timing measuring / boundary detecting section 41, the T_TSP assembling section 42 is set to 4
It will give an instruction to terminate before 5 time stamps are accumulated.

According to the recording form shown in FIG. 2, the recorded contents are M
PEG2 system standard (ISO / IEC 13818-
The bitstream structure conforms to the transport stream specified in 1). From this, AV
When a data recording device and a personal computer are connected by a 1394 interface and a file recorded via the SBP-2 protocol is accessed from the personal computer, the file is compliant with the transport stream, so the video display and editing of the file are performed. It can be easily processed using general-purpose application software. However,
Here, when the video is displayed on the personal computer monitor using the application software, the recorded T_TSP needs to be skipped.

This means that the PID of T_TSP is changed to PMT.
It can also be realized by not registering with. This is because it is a general playback operation that PIDs that have not been registered in the PMT are ignored.

Further, it is possible to easily realize that after recording an arbitrary transport stream input to the 1394 interface in the synchronous transfer (Isochronous) mode, the same transport stream is output at the same timing as at the time of input. You can This is because the input transport stream can be recorded as it is with the time stamp information without being converted into the program stream, and can be output as it is.

Further, since the time stamp information is recorded, it is not necessary to perform the buffer simulation of the external device on the receiving side to calculate the transmission timing when outputting from the 1394 interface. For example, C in Japan
Between the S broadcast and the BS broadcast, the assumed buffer size on the receiving side and the included elementary stream (E
S) and the number of user-specific streams and the data rate are different, but even in this case, it is not necessary to separately perform the buffer simulation for each broadcasting system.

By storing the time stamp information in the transport packet, for example, as compared with the method of adding a 2-byte time stamp before the packet for each transport packet, a sector boundary of 2 Kbytes is created. Since it has a good affinity with, it is convenient when editing. The least common multiple of 190 bytes and 2048 bytes is 1
Although it is 90 Kbytes, the least common multiple of 188 bytes and 2048 bytes is 94 Kbytes, which is about half.

As described above, according to the first embodiment,
Since there is no need to perform special stream conversion processing when the 1394 interface is used, recording that guarantees continuous playback is performed, and a data file that conforms to MPEG is visible when connected to a PC, a synchronous transfer means for video through a digital interface is used. It is possible to easily and efficiently realize both the guarantee of real-time recording and real-time playback used and the playback guarantee of the file using the asynchronous transfer means when the personal computer is connected.

In the first embodiment, V_TS
The time stamp stored in P is described as 45, but the time stamp is not particularly limited to this, and may be 90 in 2 byte units or less than 60 in 3 byte units. . However, it goes without saying that the more the data is stored, the lower the redundancy in recording can be.

Further, in the first embodiment, V_TSPs are arranged for every 45, but the input time information for the transport packet including the head of GOP is included as the head input time information in T_TSP. It may be possible to arrange it just before the transport packet including the GOP. By doing so, it becomes possible to easily perform the reproduction skip in GOP units. Further, the input time information of the transport packet including the sequence header may be included as the first input time information in T_TSP.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings. FIG. 8 is a diagram showing a data structure of a transport packet T_TSP in the AV data recording / reproducing apparatus according to the second embodiment of the present invention. As shown in FIG. 8, according to the second embodiment, the time stamp value is compressed as compared with the first embodiment.
The difference is that the compressed value is stored in the form of variable length data size.

That is, the compressed time stamp value stores the data size with a fixed length of 5 bits, and then stores the time stamp value compressed by the two's complement representation of the data size. For example, if the compressed time stamp value is "-1", it is stored as 2-bit notation "11". If the compressed time stamp value is "1", it is stored as 2-bit notation "01". Further, if the compressed time stamp value is "2", it is stored as the 2-bit notation "010". In this way, the most significant bit is treated as the sign bit.

Then, the combined data in which the above-mentioned data size and the compressed time stamp value are paired is T_T.
It is repeatedly stored until the SP is full, and the number of stored combination data is also stored in T_TSP as the number M of time stamps.

The base time value indicating the relationship with the compressed time stamp value is also stored in T_TSP. Here, the base time value is composed of a combination of the data size of the base time value itself and the base time value. This base time value is a constant that can be set for each T_TSP used to increase the compression rate of the time stamp value.

FIG. 9 shows A according to the second embodiment of the present invention.
It is explanatory drawing which shows the calculation method of the time stamp compression value in a V data recording / reproducing apparatus. As shown in FIG. 9, T_
After the time stamp value # 1 in the TSP, the difference between the time stamp value and the immediately preceding time stamp value is calculated, the base time value is further subtracted, and then the calculated value is set as an integer value using a two's complement expression. It is stored in T_TSP using the minimum required number of bits. On the other hand, T_TSP
The time stamp value # 0 at the head of is stored in the T_TSP using the minimum time required bit number as the integer time stamp value as it is.

FIG. 10 is a diagram showing a data structure of a recording file in the AV data recording / reproducing apparatus according to the second embodiment of the present invention. As shown in FIG. 10, the recording file is composed of a plurality of MPEG sequence object units (hereinafter referred to as “SOBU”). Each SOBU is composed of T_TSP and a transport packet group (hereinafter referred to as “TSPG”).

In FIG. 10, the first TS in a SOBU
An example is shown in which the PG is composed of M transport packets, and the compressed time stamp for each packet is stored in the immediately preceding T_TSP. And
The head of this first TSPG is V_TSP, and the head of its effective data area (hereinafter referred to as "payload") is at the head of PES header and ISO / IEC 13818-2.
A sequence header defined by the (MPEG2 video) standard is included.

The other TSPG is composed of N transport packets. 1 in other TSPGs
The beginning of one TSPG is V_TSP, and the beginning of its payload is ISO / IEC 13818-2 (MPE
A group of pictures (hereinafter referred to as "GOP") defined by the G2 video standard is arranged.

Although not shown in FIG. 10, when the compressed time stamp value does not fit in one T_TSP, the T_TSP is temporarily terminated and stored in the next T_TSP as in the first embodiment. Will be done. Note that T_
Since the data length of the compressed time stamp is variable, the number M of time stamps stored in the TSP is different depending on the stored time stamp. Also, even if the time stamp value does not fill up within one T_TSP, it will be aborted midway,
You may move to the next T_TSP.

Note that, in FIGS. 8, 9 and 10, parts that are not related to the data structure are the same as those in the first embodiment.

In the second embodiment, FIGS. 8 and 9 are used.
The data structure of allows up to 255 time stamps to be stored in T_TSP. The largest number of cases that can be stored is when the compressed time stamp value is "0", and in this case, the time stamp # 1 and subsequent ones are only 5 bits required to indicate each data size. This is a case where the input intervals of the transport packets are equal and a clock value equivalent to the input interval is selected as the base time value. In this case, the total amount of T_TSP data is 0.39
It is possible to reduce it to%. Considering that it is 2.2% in the case of the first embodiment, the data amount of T_TSP can be compressed to about 1/5 at the maximum.

For example, when the output of the MPEG encoder is connected to the 1394 interface section 1 shown in FIG.
By controlling the transmission intervals of the transport packets generated by the EG encoder to be as uniform as possible, it is possible to increase the compression rate of T_TSP.

As the base time value, the immediately preceding T_
By selecting the average value of the difference values between the time stamps when TSP is generated, it can be expected that the compression rate of T_TSP is increased.

Further, when the average bit rate of the input stream is known in advance, the counter value corresponding to the time interval when the transport packets are evenly input is selected as the base time value, so that T_TSP It can be expected that the compression rate will increase.

Further, it is not always necessary to set the base time value, and there is no problem even if it is always set to "0 (zero)". In this case, although the compression rate of the time stamp decreases, compared with the case of the first embodiment,
Since the data size of the time stamp value is variable, the superiority of the ratio (redundancy) of T_TSP with respect to the whole remains unchanged.

In addition, ISO / IEC 13818-2
The transport packet including the sequence header defined by the MPEG2 compressed video defined by the (MPEG2 video) standard may always correspond to the time stamp # 0 of T_TSP. However, for that purpose, V_TSP including the sequence header is detected when the transport packet is received, T_TSP is once terminated if detected, and the time stamp value of the detected packet is used as the start time stamp value of the new T_TSP. Must be set. As a result, no matter which sequence header in the middle of the video the playback starts, T_T
Since the SP exists immediately before, there is no need to search for T_TSP from a maximum of 255 transport packets and scan the time stamp value in T_TSP.

In addition, ISO / IEC 13818-2
A transport packet including a program association table (hereinafter referred to as "PAT") defined by the (MPEG2 video) standard is always T_TS.
It may correspond to the time stamp # 0 of P.
However, for that purpose, it is necessary to detect the PAT at the time of receiving the transport packet, terminate the T_TSP once if detected, and set the time stamp value of the detected packet as the time stamp value at the beginning of a new T_TSP. is there. As a result, even when the transport packet is started to be transmitted from the PAT in the middle of the video, T_TSP exists immediately before, so that the transport timing can be known among many (255, for example) transport packets. There is no need to perform the process of finding T_TSP from.

Further, the recording / reproducing apparatus according to the present embodiment is
The transport stream is input from the outside, but when the transport stream is generated inside the recording / reproducing apparatus (for example, when analog video input is MPE
In the case of G2 compression), as a transport packet forming the TSPG at the beginning of the SOBU, first a transport packet including PAT, and second, a transport including a program map table (hereinafter referred to as “PMT”). A port packet, thirdly, a transport packet including a PES header, a sequence header, and a PCR (program clock reference) may be arranged. MOBU shown in FIG. 16 shows an example in the case where such an arrangement is performed. As a result, no matter which sequence header in the middle of the video the transmission is started from, T_TSP is present three times before, so it is often used to know the transmission timing (for example, 255).
It is not necessary to search for T_TSP from each transport packet and skip further to the corresponding time stamp value in T_TSP.

Furthermore, ISO / IEC 13818-2
The transport packet including the GOP header defined by the (MPEG2 video) standard may be always associated with the time stamp # 0 of T_TSP. However,
To do so, when receiving a transport packet, GOP
It is necessary to detect the header, terminate the T_TSP once if detected, and set the time stamp value of the detected packet as the time stamp value at the beginning of a new T_TSP. As a result, even when the reproduction is started from the GOP header in the middle of the video, the T_TSP exists immediately before, so the T_TSP is searched from the previous transport packet in order to know the transmission timing, and the T_TSP Therefore, it is not necessary to further skip the corresponding time stamp value. When the reproduction is started from the head of the GOP, the corresponding PAT, PMT, and sequence header must be known and output prior to the GOP.

Further, when the input transport stream is mainly an audio stream and when a transport stream consisting of only audio is generated by the highest recording device, the time stamp # 0 of T_TSP is set for each fixed number of audio frames. In addition, the transport packet including the beginning of the voice frame or the PAT / PMT before the transport packet may be supported. However, in order to do so, the voice frame is detected when the transport packet is received,
When all the time stamps corresponding to a fixed number of voice frames are stored in T_TSP, it is necessary to terminate T_TSP once and set the time stamp value at the beginning of a new T_TSP from the next voice frame. As a result, no matter which audio frame in the middle of the audio stream the reproduction is started from, the T_TSP exists immediately before. Therefore, in order to know the transmission timing, the process of searching the previous transport packet for the T_TSP is performed. There is no need to do it. The fixed number of audio frames is set as an audio frame for about 1 second, for example.

FIG. 17 shows a configuration example in such a case. In FIG. 17, AOBU is composed of a fixed number of audio frames for about 1 second. At the beginning of AOBU,
Record T_TSP. In addition, each AOBSU has a PAT
Record _TSP and PMT_TSP at the beginning. Furthermore, each AOBSU will store four voice frames. Since AOBSU records a fixed number of audio frames of 100 msec or less, PAT / PM
The transmission interval of T is also 100 msec or less. Note that T_
The TSP may be recorded in the middle of AOBU.

Furthermore, the BS digital broadcasting standard (ARIB STD-
When a data stream conforming to the data broadcast defined in B24) is included, the time stamp # 0 of T_TSP may always correspond to the transport packet including the head of the decoding unit of the data stream. However, for that purpose, the beginning of the decoding unit of the data stream is detected when the transport packet is received, the T_TSP is terminated once if detected, and the time stamp value of the detected packet is set to the new time stamp of the beginning of the new T_TSP. Must be set as a value. by this,
When starting data reproduction from any decoding unit in the middle of the video, the T_TSP exists immediately before, so the T_TSP is searched for in the previous transport packet and the T_TS
It is not necessary to perform the process of further skipping to the corresponding time stamp value in P.

In the second embodiment, TSP is used.
The PES header starts from the beginning of the payload of the transport packet forming G, and the video sequence header and GOP header start from the beginning of the PES header, but it may start in the middle of the payload.

In the second embodiment, the SOB
Although the transport packet forming the first TSPG of U includes the sequence header, a predetermined number (for example, one) of transport packets may exist immediately before that. For example, a case may be considered in which a transport packet having a specific PID is always inserted at the beginning of the SOBU to include information regarding each SOBU in the transport packet.

In the second embodiment, when the time stamp values that are continuously compressed are equal,
Although it is assumed that the same value is stored consecutively, it is possible to further compress the information amount by storing the number of consecutive times itself. For example, if the 5-bit data length is' 111
When 10 'is coded, the number of consecutive times may be continuously associated with a fixed length representation of 3 bits. That is, it is assumed that the compressed values of the time stamp immediately before the data length becomes '11110' are continuous. As a result, the redundancy is further reduced to about 1/4 (8/3
It becomes possible to suppress to 5). However, in this case, since the number of time stamps that can be stored in T_TSP is approximately four times, it is necessary to increase the field for setting the number of time stamps from 8 bits to 11 bits. It is also possible to allocate a larger number of bits to the number of consecutive times, but be careful not to make the memory size required for the delay unit 13 excessive, and
It goes without saying that it is necessary to consider that the influence of the loss of T_TSP becomes large.

In the second embodiment, the PID of T_TSP is assumed to be '0x1FFE', but it is desirable that the PID is a value that is not generally used as much as possible.
Transport stream input from the outside is the same PI
This is because, when D is used, the same PID is assigned to different elementary streams.
Other values include '0x001D' and '0x1777'
Etc. are considered to be appropriate.

In the second embodiment, T_TSP
There may be a case where a stream input from the outside uses the same PID value as the PID used for. In order to make it easier to distinguish during playback, T_TSP has an internal T_TSP.
An ID for identifying the TSP (eg, ascii character of'T_TSP ') is set at a predetermined position (eg, immediately after the section header, that is, the 9th byte from the beginning).
You may insert it in. However, if processing is performed according to the number of time stamps in T_TSP, there is no confusion in principle.

Further, in the second embodiment, the PID of T_TSP is assumed to be '0x1FFE', but M
It may be a null packet whose PID is determined to be “0x1FFF” in the PEG standard. FIG. 12 shows an example of the data structure of the null packet.

In this case, according to the MPEG standard, any value may be set in the payload part of the null packet, so that the time stamp is stored in the payload part to be used in the input transport stream. It will not collide with the PID of the elementary stream. This is because the elementary stream is not stored in the null packet.

Needless to say, the recorded data can be displayed as an image without connecting an external device to the 1394 interface by providing an MPEG decoder or a display device inside the AV data recording / reproducing device.

(Third Embodiment) The third embodiment of the present invention will be described below with reference to the drawings. In the third embodiment, a case will be described in which moving image streams recorded in advance by the method described in the first or second embodiment are connected.

First, FIG. 13 is an illustration of a data structure of a recorded moving picture stream in the AV data recording / reproducing apparatus according to the third embodiment of the present invention. In FIG. 13, V is V_TSP and A is A_T for simplification of display.
SP, P is P_TSP (padding), T is T_T
SP (time stamp) and G represent G_TSP (gap information), respectively.

As shown in FIG. 13, moving picture stream # 1
The video stream # 2 and the video stream # 2 are recorded with the connection part interposed therebetween. The connection part starts with G_TSP (gap transport packet), and then DIT (Discontinuity) defined in the DVB standard.
Two transport packets including the information table (both PID is “0x001E”) (actually, the DIT is stored only in the second of the two. The first indicates that it is discontinuous. Value is only stored) and P_TSP (Padding Transport Packet). Note that G_TSP and P_TSP
Has its own data structure, and details will be described later.

One G_TSP and two DITs are always recorded, and the maximum data size of the connection portion is 94 Kbytes (94 × 1024 bytes, which is the lowest common multiple of the sector size 2048 and the packet size 188), and the minimum is 3 × 188 bytes. In addition, sectors # (N-1), #N, # (N + 1),
# (N + 2) indicates a physically continuous sector.

FIG. 14 is a view showing an example of the data structure of G_TSP. The data structure of the transport packet header and the section header is the same as that of FIG. 8 except for PID (0x1FFD) and the like. After the section header, the identifier ('GTSP') and the number of transport packets in the connection part are set. When connecting two video streams, no time stamp is added to the transport packets in the connection part, so the number of transport packets in the connection part is equal to the number of transport packets without corresponding time stamps.

FIG. 15 is a view showing an example of the data structure of P_TSP. Since it is a packet used for padding, no particularly important value is stored, and it differs from the transport packet header (PID is' 0x1FFC '), section header, identifier (' PTS
14 is similar to that of FIG.

When connecting the moving picture streams, it is necessary to secure the continuity of the transport packets from the moving picture streams # 1 to # 2 and fill the data in each logical sector with the transport packets. Therefore, a maximum data size of 94 Kbytes is required for the connection part.
That is, it is necessary to newly record the data corresponding to the connection portion at the time of connection. Furthermore, the connection portion and the portions before and after it are re-recorded so that they are recorded in physically consecutive sectors.

When playing the connected video stream, G_
With reference to the number of packets of the connection portion stored in the TSP, out of the transport packets corresponding to the number of packets, the packets other than the transport packets (two) including DIT are not transmitted. The two DITs are sent immediately after the previous video stream.

As a result, unnecessary packets are not transmitted when the moving picture streams # 1 and # 2 are connected, so that the connectivity between the streams is improved. That is, FIG.
When a digital television connected to the 1394 interface of the above decodes a video stream, there is no data to be displayed next after the connection point, and the video frame is not updated, and the video frame immediately freezes. Can be prevented.

By setting the PID of G_TSP to a value different from P_TSP, the continuity counter of all G_TSPs even if there are a plurality of connected parts.
Since the value of is always "0 (zero)", recording becomes easy. If PID is the same as P_TSP, it becomes necessary to consider the continuity of values.

Further, since it is not necessary to set the time stamp when connecting the moving picture stream, the editing process at the time of connection can be simplified. This is because when setting the time stamp, it is necessary to set the transmission timing for each packet.

In the fifth embodiment, the connection portion is recorded on consecutive logical sectors, but only the logical sector # (N + 1) shown in FIG. 13 is logically physically separated. Even if it is recorded on the sector, since the logical sector # (N + 1) is skipped by looking at the number of transport packets of the connection part in the G_TSP at the time of reproduction, the seek operation of the connection part is skipped. It is possible to prevent the occurrence.

By assuming such an operation,
It is also possible to reduce the data size of the continuous data area around the connection part, which is required when connecting two streams. This is because it is not necessary to secure the data size of the portion excluding both ends of the connection portion as the data size of the continuous data area in advance.

In the fifth embodiment, P_TSP is also recorded in the logical sector # (N + 1) in the connection portion. However, looking at the number of transport packets required in the connection portion in G_TSP, Logical sector # (N
+2) to find the byte position of T_TSP, and G_T
By reading SP, DIT, DIT, and T_TSP in this order, it is possible not to record the data on the logical sector # (N + 1).

Further, in the fifth embodiment, the number of packets of the connection part is recorded in G_TSP of the connection part, but it may be recorded as management data for the transport stream.

Further, in the fifth embodiment, the data size of the packet is 188 bytes, but it may be 192 bytes with a 4-byte time stamp added.

Further, in the present embodiment, the digital interface is a transmission line conforming to the 1394 standard, but MP
Any EG data may be used as long as it has a synchronous transfer and / or an asynchronous transfer.

In the present embodiment, the storage medium is the phase change optical disk, but the present invention is not limited to this, and for example DVD-RAM, MO, DV.
D-R, DVD-RW, DVD + RW, CD-R, CD
Any recording medium having a disk shape such as an optical disk such as RW or a hard disk may be used. Further, it may be a semiconductor memory.

Similarly, although the read / write head is a pickup in this embodiment, it is a pickup and a magnetic head in the case of MO and a magnetic head in the case of a hard disk.

In the embodiment of the present invention, 13
Although it is premised on the case of inputting and outputting through the 94 interface, it may be a recording / reproducing apparatus having a camera unit, a compressing unit, and an expanding unit in the main body such as a camcorder.

In the embodiment of the present invention, the transport stream may be in a format compliant with the digital broadcasting standard using MPEG, or may be a format compliant with digital data broadcasting using MPEG. Is also good. By doing so, compatibility with the set top box (STB) for digital broadcasting can be enhanced, and the functions of the STB such as the data broadcasting receiving function can be utilized.

In the present embodiment, T_TSP
Has been described as being arranged immediately before the corresponding transport packet, but may be arranged immediately after the corresponding transport packet. Further, it may be arranged at a position away from the corresponding transport packet, but it goes without saying that in this case, it is necessary to add the position information of the corresponding transport packet.

In this embodiment, the time stamp uses the data structure of the section defined by the ISO / IEC 13818-1 (MPEG2 system) standard. However, the time stamp of the PES stream defined by the standard is used. It is also possible to use the data structure, the data structure of the user data in the PES header, or the data structure of the user data in the adaptation field.

In the present embodiment, all input transport packets are recorded, but P
It is possible to remove T_TSP at the time of input by detecting the ID or the like. By doing this, T
It is possible to prevent _TSP from being erroneously and redundantly added.

Further, in the present embodiment, T_TSP is not output when the recording file is output, but it may be intentionally output. By doing this,
Isochronous transmission can be used to implement a copy of the transport stream containing timing information. That is, accurate timing information can be transmitted even if the receiving side does not have a function of independently adding a time stamp. For example, it is effective when the receiving side is a personal computer that does not have dedicated hardware.

In this embodiment, T_TSP is
Although it is supposed to be added after the MPEG stream is assembled, T_TSP may be inserted when the MPEG stream is assembled. That is, the MPEG encoder connected to the 1394 interface shown in FIG.
The MPEG stream may be input to the recording / reproducing apparatus after inserting the SP. However, in this case, T_TS
It goes without saying that it is necessary to skip the process of adding P. In this case, T_TSP is inserted in a form that satisfies the buffer simulation for T_TSP when assembling the MPEG stream.

[0183]

As described above, according to the AV data recording / reproducing apparatus of the present invention, the video is transmitted to the D-VHS or the set top box (STB) via the IEEE 1394 digital interface, or the D-VHS or the set-top box (STB) is transmitted. It is possible to easily realize a video recording / reproducing apparatus which is easy to input from a set top box (STB) and which records so that continuous reproduction or continuous recording is possible, and at the same time, an MPEG system stream recorded when a personal computer is connected. However, it is possible to easily realize an AV data recording / reproducing device that can be easily viewed as data conforming to the MPEG standard.

That is, A having various functions (continuous reproduction, digital transmission, file operation) for recorded video
It is possible to easily realize the V data recording device.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an AV data recording / reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a recording mode in the AV data recording / reproducing apparatus according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a data structure of a transport packet according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a configuration diagram record content of a conventional AV data recording / reproducing apparatus.

FIG. 5 is a diagram showing a recording form in a conventional AV data recording / reproducing apparatus.

FIG. 6 is a diagram showing a data structure of a recording file in a conventional AV data recording device.

[Figure 7] Configuration diagram of allocation descriptors

FIG. 8 is a diagram showing a data structure of a transport packet according to the second embodiment of the present invention.

FIG. 9 is an explanatory diagram of a method of calculating a compressed time stamp value according to the second embodiment of the present invention.

FIG. 10 is a diagram showing a data structure of a recording file according to the second embodiment of the present invention.

FIG. 11 is a T_TSP according to the first embodiment of the present invention.
Configuration diagram of generator

FIG. 12 is a diagram showing a data structure of a null packet according to the second embodiment of the present invention.

FIG. 13 is a diagram showing a data structure of a moving image stream in the AV data recording / reproducing apparatus according to the third embodiment of the present invention.

FIG. 14 is a G_TSP according to the third embodiment of the present invention.
Figure showing the data structure of

FIG. 15 is a P_TSP according to the third embodiment of the present invention.
Figure showing the data structure of

FIG. 16 is a diagram showing a recording mode in the AV data recording / reproducing apparatus according to the second embodiment of the present invention.

FIG. 17 is a diagram showing a recording mode in the AV data recording / reproducing apparatus according to the second embodiment of the present invention.

[Explanation of symbols]

1 1394 interface section 2 T_TSP generator 3 MUX section 4 Output timing adjustment section 5 recording section 6 reproduction section 7 Continuous data area detector 8 Recording control unit 9 Playback control section 10 Logical block management unit 11 Phase change optical disk 12 pickups 13 Delay section 20 TS / PS converter 21 PS / TS conversion and conversion timing adjustment unit 30 DVD-RAM disc 40 PCR extractor 41 Input timing measurement / boundary detection section 42 T_TSP Assembly Department 43 memory 100, 200 recording / reproducing apparatus

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G11B 20/12 103 G11B 27/00 D 27/00 H04N 5/85 Z 27/034 5/92 H H04N 5 / 765 5/91 L 5/85 G11B 27/02 KF term (reference) 5C052 AA02 AA03 AB08 AB09 CC01 CC11 DD04 5C053 FA20 FA23 GA11 GB06 GB08 GB38 JA22 5D044 AB05 AB07 BC04 CC06 DE02 DE03 DE12 DE23 DE54 EF05 GK08 GK12HL11 HL11 5D110 AA17 AA27 AA29 BB29 CA09 CA42 CC03 DA11 DA17 DB02 EA07

Claims (65)

[Claims] 1. A packet input unit for inputting a packet having a predetermined data structure, and at least one piece of information concerning the packet having at least the input time of the inputted packet having the same data structure. An information generation unit to be stored in another packet, one or a plurality of the packets, and a recording unit to record the other packet having information about the packet, wherein the recording unit is one or a plurality of An AV data recording device, wherein the packet and the other packet having information about the packet are recorded together. 2. A packet input unit for inputting a packet having a predetermined data structure, and time information for storing input time information relating to one or a plurality of the inputted packets in another packet having the same data structure. A generation unit, one or a plurality of the packets, and a recording unit that records the other packet having input time information regarding the packet, wherein the recording unit includes one or a plurality of the packets, and An AV data recording device, characterized in that the other packet having input time information regarding the packet is recorded together. 3. A transport packet input section, a time information generation section for storing input time information relating to one or more input transport packets in another transport packet, and one or more of the above. A transport packet, and a recording unit for recording the other transport packet having the input time information regarding the transport packet, wherein the recording unit includes one or a plurality of the transport packets and the input An AV data recording apparatus, characterized in that the other transport packet having time information is recorded together. 4. The time information generation unit stores a predetermined number of the input time information in the other transport packet, and the recording unit stores the input time for a predetermined number of the transport packets. The AV data recording apparatus according to claim 3, wherein one or more corresponding transport packets are recorded immediately after the other transport packet having information. 5. The time information generation unit stores a predetermined number of the input time information in the other transport packet, and the recording unit stores the input time for a predetermined number of the transport packets. The AV data recording apparatus according to claim 3, wherein one or more corresponding transport packets are recorded immediately before the other transport packet having information. 6. The AV according to claim 3, wherein the recording unit records the corresponding transport packet immediately after the other transport packet having the input time information regarding each of the transport packets.
Data recording device. 7. The AV according to claim 3, wherein the recording unit records the corresponding transport packet immediately before the other transport packet having the input time information regarding each of the transport packets.
Data recording device. 8. The input time information regarding a plurality of transport packets in the time information generation unit,
4. The AV data recording device according to claim 3, wherein the input time information is compressed and stored when it is stored in another transport packet. 9. The input time information regarding a plurality of transport packets in the time information generation unit,
The AV data recording apparatus according to claim 3, wherein the input time information is stored as variable length data when the input time information is stored in another transport packet. 10. When the input time information regarding a plurality of transport packets is stored in another transport packet in the time information generation unit, when the input time information is continuously equal, 4. The A according to claim 3, wherein a continuous count is stored as the input time information.
V data recording device. 11. When the time information generation unit stores the input time information relating to a plurality of transport packets in another transport packet, 2
The AV data recording apparatus according to claim 3, wherein a difference value between two input times is stored as the input time information. 12. The time information generation unit stores 2 when the input time information regarding a plurality of transport packets is stored in another transport packet.
4. The AV data recording device according to claim 3, wherein a value obtained by subtracting a predetermined numerical value from a difference value between two input times is stored as the input time information. 13. The time information generating unit stores 2 when the input time information regarding a plurality of transport packets is stored in another transport packet.
4. The AV data recording apparatus according to claim 3, wherein a value obtained by subtracting a predetermined numerical value from a difference value between two input times is stored as the input time information and is stored in the transport packet together with the predetermined numerical value. 14. The time information generation unit sets the average value of the difference values in the other transport packets generated in the past as the predetermined numerical value.
The described AV data recording device. 15. The AV according to claim 12 or 13, wherein a value corresponding to a bit rate of an input transport packet is set as the predetermined numerical value in the time information generating unit.
Data recording device. 16. The input time information for a transport packet including a head part of a decoding unit of a specific elementary stream, in the time information generating section,
4. The AV data recording device according to claim 3, wherein the AV data recording device stores it as the input time information located substantially at the beginning of another transport packet. 17. The time information generation unit stores the input time information for a transport packet including a head portion of a video decoding unit as the input time information located at a substantially head of another transport packet. The AV data recording device according to claim 3. 18. The time information generating unit stores the input time information for a transport packet including a head portion of a video sequence header as the input time information located at a substantially head of another transport packet. The AV data recording device according to claim 3. 19. The time information generation unit further stores the input time information for a transport packet including a program association table as the input time information located at the substantially head of another transport packet. Item 19. The AV data recording device according to item 18. 20. The time information generation unit further stores the input time information for a transport packet including a video GOP header as the input time information located at a substantially first position in another transport packet. 18. The AV data recording device according to item 18. 21. The time information generation unit stores the input time information for a transport packet including a head portion of a voice decoding unit as the input time information located at a substantially head of another transport packet. The AV data recording device according to claim 3. 22. In the time information generation unit, the input time information for a transport packet including a head portion of a decoding unit of a data broadcast stream is used as the input time information located at a substantially head of another transport packet. The AV data recording apparatus according to claim 3, which stores the AV data. 23. The AV data recording apparatus according to claim 3, wherein the transport packet input section removes the other transport packet having the input time information. 24. The AV data recording device according to claim 3, wherein the input time information is stored in a payload area of a null packet in the time information generating section. 25. The AV data recording apparatus according to claim 3, wherein, in the time information generation unit, the number of transport packets in which the input time information is not stored is stored in the other transport packet. 26. A transport packet generation unit, and a time information generation unit that stores the input time information relating to one or more of the transport packets input from the transport packet generation unit in another transport packet. One or a plurality of the transport packets, and a recording unit for recording the other transport packet having the input time information regarding the transport packet, wherein the recording unit has one or a plurality of the transport packets. A port packet and the other transport packet having the input time information are recorded together, and the time information generation unit determines a predetermined value from the difference value of the input times of the two transport packets as the input time information. A value obtained by subtracting a numerical value is stored as the input time information, and Packet generation unit, AV data recording apparatus and generates a transport packet at substantially equal intervals. 27. A reading unit for reading a packet having a predetermined data structure recorded on a recording medium, and one or a plurality of data recorded on the recording medium, the information including at least information regarding an input time of the packet. A time information extraction unit that extracts one other packet that is collectively recorded for a predetermined number of pieces of information related to the packet and that specifies the input time of the packet; and an output unit that outputs the packet, An AV data reproducing apparatus, wherein the output unit outputs the corresponding packet based on information about the packet. 28. A reading unit for reading a packet having a predetermined data structure recorded on a recording medium, and a predetermined number of input time information relating to one or a plurality of packets recorded on the recording medium. A time information extraction unit that extracts one other packet that is recorded and specifies the input time of the packet, and an output unit that outputs the packet, wherein the output unit inputs the input time of the packet. An AV data reproducing apparatus, which outputs the corresponding packet based on information. 29. A reading unit for reading a transport packet recorded on a recording medium, and a predetermined number of input time information regarding one or a plurality of the transport packets recorded on the recording medium. A time information extraction unit that extracts one other recorded transport packet and specifies the input time of the transport packet; and an output unit that outputs the transport packet, wherein: An AV data reproducing device, which outputs the corresponding transport packet based on the input time information of the transport packet. 30. The output unit outputs the transport packet positioned after the other transport packet including the input time information, based on the input time information. AV data reproducing device. 31. The output packet, wherein the transport packet located before the other transport packet including the input time information is output based on the input time information. AV data reproducing device. 32. The AV data reproducing apparatus according to claim 29, wherein the other transport packet in which the input time information is collectively recorded is also output in the output unit. 33. The AV data reproducing apparatus according to claim 29, wherein the time information extraction unit extracts the input time information regarding a plurality of compressed and stored transport packets. 34. The AV data reproducing apparatus according to claim 29, wherein the time information extraction unit extracts the input time information regarding a plurality of transport packets stored as variable length data. 35. The AV data reproducing apparatus according to claim 29, wherein the time information extraction unit extracts the number of consecutive times stored as the input time information when the input time information is continuously equal. 36. The AV data reproducing apparatus according to claim 29, wherein the time information extraction unit extracts a difference value between two input times stored as the input time information. 37. The AV data reproducing apparatus according to claim 29, wherein the time information extracting unit extracts a value obtained by subtracting a predetermined numerical value from a difference value between two input times stored as the input time information. 38. The time information extracting unit subtracts a predetermined numerical value from a difference value between two input times stored as the input time information, and the predetermined numerical value stored in the transport packet. Claim 2 to extract
9. The AV data reproducing device according to item 9. 39. The average value of the difference values in the other transport packets generated in the past in the time information extraction unit is set to the predetermined numerical value.
The described AV data reproducing device. 40. The AV according to claim 37 or 38, wherein the time information extraction unit sets a value corresponding to a bit rate of an input transport packet as the predetermined numerical value.
Data playback device. 41. A transport packet including a head portion of a decoding unit of a specific elementary stream, which is stored as the input time information located at the head of another transport packet in the time information extraction unit. 30. Extracting the input time information for
The described AV data reproducing device. 42. The input time for a transport packet including a head portion of a video decoding unit, which is stored as the input time information located at a substantially head of another transport packet in the time information extraction unit. 30. The AV data reproducing device according to claim 29, which extracts information. 43. The input time for a transport packet including a head portion of a sequence header of video stored in the time information extraction unit as the input time information located substantially at the head of another transport packet. 30. The AV data reproducing device according to claim 29, which extracts information. 44. The input time information for a transport packet including a program association table, which is stored as the input time information located at substantially the beginning of another transport packet, in the time information extraction unit. 44. The AV data reproducing device according to claim 43, which extracts. 45. The time information generation unit also extracts the input time information for a transport packet including a GOP header of a video, which is stored as the input time information located at the substantially beginning of another transport packet. The AV data reproducing device according to claim 43. 46. The input time for a transport packet including a head portion of a voice decoding unit, which is stored as the input time information located at substantially the head of another transport packet in the time information extraction unit. 30. The AV data reproducing device according to claim 29, which extracts information. 47. The transport information for a transport packet including a leading portion of a decoding unit of a data broadcast stream, which is stored as the input time information located at a substantially leading portion in another transport packet in the time information extracting unit. 30. The AV according to claim 29, wherein input time information is extracted.
Data playback device. 48. A reading unit for reading out transport packets recorded in a recording medium, and a predetermined number of input time information relating to one or a plurality of the transport packets recorded in the recording medium are collectively recorded. The other transport packet extracted by the time information extraction unit, the time information extraction unit extracting one other transport packet being output, and the output unit outputting the transport packet. An AV data reproducing device characterized in that it ignores a port packet and outputs it. 49. A reading unit for reading a transport packet recorded in a recording medium, and the transport in which input time information regarding one or a plurality of the transport packets recorded in the recording medium is not stored. Record the number of packets 1
A number extraction unit that extracts one of the other transport packets to identify the number of the transport packets in which the input time information is not stored; and an output unit that outputs the transport packets, the output unit In the AV data reproducing apparatus, the transport packet in which the input time information is not stored is not output based on the number. 50. A packet input section for inputting a packet having a predetermined data structure, and at least one piece of information about the packet having information on the input time of the input packet has the same data structure. An information generation unit to be stored in another packet, one or a plurality of the packets, a recording unit to record the other packet having information about the packet, the packet and the other recorded in a recording medium A reading unit for reading a packet; a time information extracting unit for extracting the other packet corresponding to the one or more packets recorded on the recording medium to specify an input time of the packet; An output unit for outputting a packet, wherein in the recording unit, one or a plurality of the packets,
An AV data recording / reproducing apparatus, characterized in that the other packet having information on the packet is recorded together, and the corresponding packet is output at the output unit based on the information on the packet. 51. A packet input unit for inputting a packet having a predetermined data structure, and time information for storing input time information regarding one or a plurality of the inputted packets in another packet having the same data structure. A generation unit, a recording unit that records one or more of the packets, the other packet having input time information about the packet, the packet having a predetermined data structure recorded in a recording medium, and the other packets. A reading unit for reading the packet, a time information extracting unit for extracting the other packet corresponding to the one or more packets recorded on the recording medium, and specifying the input time of the packet, An output unit that outputs the packet, wherein in the recording unit, one or a plurality of the packets,
An AV data recording / reproducing apparatus, wherein the other packet having input time information regarding the packet is recorded together, and the output unit outputs the corresponding packet based on the input time information regarding the packet. 52. A transport packet input unit, a time information generation unit that stores input time information about the input one or more transport packets in another transport packet, and one or more of the above. A recording unit for recording the transport packet and the other transport packet having the input time information relating to the transport packet; and reading the transport packet and the other transport packet recorded on a recording medium. A reading unit; a time information extraction unit that extracts the other transport packet corresponding to the recorded one or more transport packets and identifies the input time of the transport packet; The recording unit has an output unit for outputting a packet. In this case, one or a plurality of the transport packets and the other transport packet having the input time information are recorded together, and the output unit responds based on the input time information of the transport packet. An AV data recording / reproducing apparatus, which outputs the transport packet. 53. A step of inputting a packet having a predetermined data structure, and at least one piece of information about the one or more packets including the input time of the input packet having the same data structure. Storing in a packet, one or a plurality of the packets, and a step of recording the other packet having information about the packet, in the recording step, one or a plurality of the packets, An AV data recording method, characterized in that the other packet having information about the packet is recorded together. 54. A step of inputting a packet having a predetermined data structure, and a step of storing the input time information regarding the inputted one or a plurality of said packets in another packet having the same data structure. Or a plurality of the packets, and a step of recording the other packet having input time information regarding the packet, in the recording step, one or a plurality of the packets and input time information regarding the packet A method for recording AV data, characterized in that the other packet having the above is recorded together. 55. A step of inputting a transport packet, a step of storing input time information regarding the input one or a plurality of the transport packets in another transport packet, and one or a plurality of the transport packets. A port packet and a step of recording the other transport packet having the input time information regarding the transport packet, wherein in the step of recording, one or a plurality of the transport packets and the input time An AV data recording method, characterized in that the other transport packet having information is recorded together. 56. A step of reading a packet having a predetermined data structure recorded on a recording medium, and one or a plurality of packets recorded on the recording medium, the packet including at least information on an input time of the packet. A predetermined number of pieces of information related to the information regarding one packet are extracted together, the input time of the packet is specified, and the step of outputting the packet is included. An AV data reproducing method, wherein the corresponding packet is output based on information about the packet. 57. Reading a packet having a predetermined data structure recorded on a recording medium, and collecting a predetermined number of input time information regarding one or a plurality of packets recorded on the recording medium. Extracting one other recorded packet and identifying the input time of the packet; and outputting the packet, wherein in the outputting step, based on the input time information about the packet An AV data reproducing method characterized by outputting the corresponding packet. 58. A step of reading a transport packet recorded on a recording medium, and one other transport packet recording input time information regarding one or a plurality of the recorded transport packets. And specifying the input time of the transport packet, and outputting the transport packet. In the outputting step, corresponding to the input time information of the transport packet. An AV data reproducing method, characterized in that the transport packet is output. 59. A step of inputting a packet having a predetermined data structure, and a step of inputting at least information about one or a plurality of the packets including information about an input time of the input packet, Storing in a packet, recording one or more of the packets, and the other packet having information about the packet, and reading the packet and the other packet recorded in a recording medium A step of extracting the other packet corresponding to the one or a plurality of the packets recorded in the recording medium to specify an input time of the packet, and a step of outputting the packet, In the recording step, one or a plurality of the packets and the other packet having information about the packet are recorded. An AV data recording / reproducing method, characterized in that, in the step of recording together, in the step of outputting, the corresponding packet is output based on information about the packet. 60. A step of inputting a packet having a predetermined data structure, and a step of storing the input time information regarding one or a plurality of the inputted packets in another packet having the same data structure. Or recording a plurality of the packets and the other packet having input time information regarding the packet; and reading the packet and the other packet having a predetermined data structure recorded in a recording medium. A step of extracting the other packet corresponding to the one or a plurality of the packets recorded in the recording medium to specify an input time of the packet, and a step of outputting the packet, In the recording step, one or a plurality of the packets and the other packet having input time information regarding the packet are shared. The AV data recording / reproducing method characterized in that the corresponding packet is output based on the input time information regarding the packet in the step of outputting. 61. A step of inputting a transport packet, a step of storing input time information regarding the input one or a plurality of the transport packets in another transport packet, and one or a plurality of the transport packets. Recording a port packet and the other transport packet having the input time information relating to the transport packet; and reading the transport packet and the other transport packet recorded on a recording medium. A step of extracting the other transport packet corresponding to the recorded one or more transport packets and specifying an input time of the transport packet; and a step of outputting the transport packet. In the recording step, one or In the step of recording a plurality of the transport packets and the other transport packet having the input time information together, and outputting the transport packet, the corresponding transport packet based on the input time information of the transport packet. An AV data recording / reproducing method characterized by outputting a packet. 62. A recording medium recorded by the AV data recording device according to any one of claims 1 to 3. 63. A recording medium recorded by the AV data recording / reproducing apparatus according to any one of claims 50 to 52. 64. A recording medium recorded by the AV data recording method according to any one of claims 53 to 55. 65. A recording medium recorded by the AV data recording / reproducing method according to any one of claims 59 to 61.