JPH1079917A - Data reproduction and recording device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enable one apparatus to reproduce and record data of two types of media having different compression formats such as MPEG2-PS and MPEG2-TS. An apparatus equipped with a decoder for reproducing a medium recording compressed video and audio data compliant with standards such as MPEG2-PS, and a medium capable of recording compressed video and audio data compliant with standards such as MPEG2-TS. A data format conversion unit for recording the media contents and converting data to reproduce the media contents, a recording unit for recording on the media, and a media content reading unit are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for reproducing and recording digital data as video and audio information such as a movie, and more particularly, to an MPEG2 (Moving Picture Experts Group Phas).
The present invention relates to a data reproducing and recording device capable of reproducing or recording various media in a compressed video / audio data format such as e2).

[0002]

2. Description of the Related Art In recent years, video and audio data compression techniques have been applied to CD-ROMs in the field of home appliances and computers for digitalization of audio and video from the field of communication in which video and audio signals are transmitted using communication lines. It extends to digital storage media such as DVDs. In particular, with the standardization of MPEG2, which is a high-efficiency video and audio data compression technology, in the field of communications, a new digital broadcasting service combining this MPEG2 and communication satellites has been launched in the United States, and soon in Japan. In the field of home appliances and computers, MPs that compress data such as karaoke and movies
Storage media for recording EG2 data (for example, CD-ROM or D
VD, etc.), players and peripherals for playing it, and receivers for the digital broadcasting service (IRD: Integrate
d Reciever Decoder) and program contents (video and audio data)
Research and development of digital VTRs and the like that record video are being promoted.

The MPEG2 standard is an MPEG2-PS (Program Stream) format in which one program (movie, program, etc.) is multiplexed into basic packets and transmitted in a time-division manner. MPEG2-TS (Transpor
t Stream) format. MPEG2-PS mainly records one movie or program on a storage medium such as a DVD.
Used in playback systems. In addition, MPEG2-TS is mainly used for broadcasting systems and ATMs (Asynchronous
ous Transfer Mode), and is also used in its receiver (IRD) and digital VTR systems. Currently, MPEG2-P
2. Description of the Related Art Dedicated devices such as a player for playing media recording video and audio data such as a movie in the S format and a digital VTR for recording and playing broadcast programs transmitted in the MPEG2-TS format are being developed.

[0004]

However, conventionally, MPEG
In order to play back video and audio data compressed in different stream formats such as 2-PS format and MPEG2-TS format, a dedicated device equipped with decoding means (decoder) corresponding to each compression standard is required. Was. For example, in order to play a medium (for example, DVD) in which video and audio data is recorded in the MPEG2-PS format, a decoder for MPEG2-PS is required on the playback side, and a medium recorded in the MPEG2-TS format (eg, ,
In order to play back D-VHS magnetic tape, a decoder for MPEG2-TS is required. Therefore, in order to reproduce each media, it is necessary to prepare a dedicated player including the decoder.

[0005] The medium includes a read-only medium mainly used for reproducing movies and various programs such as a CD-ROM and a DVD, a magnetic tape, a hard disk (HD), and the like.
There are rewritable media used for recording and reproducing programs and various data, such as a magneto-optical disk (MO).

[0006] Therefore, since it is necessary to record and reproduce media suitable for each use with a dedicated player, the user needs to arrange individual players, which causes a problem that the system lacks versatility. In addition, in order to exchange data between media with different stream formats such as MPEG2-PS and MPEG2-TS, it is necessary not only to connect individual players, but also to convert data. However, a device provided with such means has not yet been proposed.

An object of the present invention is to provide a versatile data reproducing and recording apparatus which can record and reproduce data of media having different compression formats such as MPEG2-PS and MPEG2-TS. It is in.

[0008]

According to the present invention, in order to solve the above-mentioned problems, the following means are provided in a data reproducing and recording apparatus.

First, a playback-only medium 1 (DVD) in which a movie or the like is recorded in the MPEG2-PS format is played back.
Is recorded on a rewritable medium 2 (magnetic tape) that records the data in the MPEG2-TS format according to a predetermined format, and constitutes a data reproducing and recording apparatus that reproduces only data conforming to the recording format of the medium 2. For this purpose, (1) a read-only medium 1 (DVD) in which data obtained by encoding video and audio information in the MPEG2-PS format is recorded, and (2) a data for reading the data of the medium 1 for each recording unit (sector unit). Reading means, (3) interpreting header information (pack header or packet header) included in the data to reproduce the data read using the reading means (2), and converting the data into a video packet, an audio signal; -Data interpreting means for separating packets and other system information (reproduction output time, etc.) into various types; (4) Video separated using data interpreting means (3) (E) data decoding means for decoding an audio packet or an audio packet; (5) data individually decoded using the data decoding means (4);
Data output means for outputting to an output device (for example, a video monitor or a speaker);
A rewritable medium 2 (magnetic tape) for recording data encoded by TS; (7) a format (fixed-length TS packet) in which data in sector units read by using the reading means (1) can be recorded on the medium 2 (8) a data conversion unit for converting the data converted by using the data conversion unit (7) into the medium 2;
(9) reading means for reading the data of the medium 2 for each recording unit; (10) a format in which the data read by the reading means (9) can be reproduced by the data interpreting means (3) (the format of the medium 1) Data conversion means for converting data in units of sectors.

In the reproduction of the medium 1 (1), the data of the medium 1 is read for each recording unit by using the reading means (2), and the data is interpreted by the data interpreting means (3) to read the video, audio, etc. , And decodes the individual data packet using data decoding means (4), and outputs the data to an output device using data output means (5). In order to record the contents of the medium 1 on the medium 2 (6), the data of the medium 1 is read for each recording unit using the reading means (2), and the data is read using the data converting means (7). The format is converted to a format (fixed length TS packet unit) that can be recorded on the medium 2. Then, the data is recorded on the medium 2 using the recording means (8).

In the reproduction of the medium 2 (6), the data of the medium 2 is read by using the reading means (9), and the data is read by using the data converting means (3) by using the data converting means (10). Convert to a format that can be played. The data interpreting means (3) interprets the converted data and separates the data into individual data packets such as video and audio data, and decodes the individual data packets using the data decoding means (4). Then, the data is output to the output device using the data output means (5).

Next, in order to constitute a data reproducing apparatus for reproducing the medium 2, (11) reading means for reading data of the medium 2, (12) reading means (11)
Data determination means for determining whether or not data read out using MPEG2-TS is data conforming to the MPEG2-TS format, (13) MPEG2-
If the data conforms to the TS format, interpret the header information of the TS packet and determine the format (MPEG2 PES packet)
And edit the data into video packets, audio
Data interpretation means for separating packets and other system information (reproduction output time and the like) into various types;
4) If the data is other than the data conforming to the MPEG2-TS format,
The header information contained in the data is interpreted and edited into a predetermined format (MPEG2 PES packet).
Data conversion / interpretation means for separating packets, audio packets, and other system information (reproduction output time, etc.) into various types, (15) data interpretation means (13)
Alternatively, data decoding means for decoding video packets and audio packets separated by using data conversion / interpretation means (14), (16) data decoding means (1)
Data output means for outputting data individually decoded using 5) to an output device (for example, a video monitor or a speaker) is provided.

In the reproduction of the medium 2 (6), after reading the data of the medium 2 by using the reading means (9), the data is read by the data judging means (12).
It is determined whether the data conforms to the TS format. as a result,
If the data is data conforming to the MPEG2-TS format, the data interpreting means (13) interprets the header information of the data and edits it into a predetermined format (MPEG2 PES packet),
The data is converted into video packets, audio packets,
Other system information (reproduction output time, etc.) is separated for each type. If the data does not conform to the MPEG2-TS format, the data conversion / interpretation means (14) interprets the header information included in the data and converts the header information into a predetermined format (PPEG of MPEG2).
ES packet) and convert the data to a video packet,
Separate audio packets and other system information (such as playback output time) into various types. After that, each individual data is decoded using the data decoding means (15), and the data is output to the output device using the data output means (16).

[0014]

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

FIG. 1 is a block diagram showing a first embodiment of a digital data reproducing and recording apparatus according to the present invention. In this embodiment, a read-only medium 10 (for example, a DVD, hereinafter referred to as a type 1 medium) in which compressed video and audio data conforming to the MPEG2-PS format is recorded in sector units, and an MPEG2-TS format Example of handling media using two different compression formats, such as rewritable media 20 (for example, digital VHS magnetic tape, hereinafter referred to as type 2 media) that records compliant compressed video and audio data in TS packet units Will be described.

As shown in FIG. 1, the digital data reproducing and recording apparatus 100 includes a type 1 data reading section 101, a data format conversion section 102, a type 2 data recording section 103, a type 2 data reading section 104, A type 1 data interpretation unit 105, a demultiplexing unit 106, a compressed video / audio data decompression unit 107, an audio output unit 108, a video output unit 109, a control unit 110, and an operation input unit 111 are provided.

The data read unit 101 for type 1 uses an MPEG
This is a means for reading the contents (data) of the type 1 medium 10 conforming to the 2-PS format for each sector (one pack).

The data format conversion unit 102 stores the type 1 medium 1 read by the type 1 data read unit 101.
In order to record data of each sector unit of 0 on the medium 20 conforming to MPEG2-TS, the data is processed and converted into a format recordable on the medium 20. Details regarding the conversion method will be described later.

The type 2 data recording section 103 is means for recording the data output from the data format conversion section 102 on the type 2 medium 20.

The type 2 data reading section 104 is means for reading data recorded on the type 2 medium 20.

The type 1 data interpreting unit 105 is a means for interpreting the contents of data read from the type 1 medium 10, editing the data into packets, and outputting the packets.

The demultiplexing unit 106 analyzes the contents of the packet output from the type 1 data interpreting unit 105 and converts each packet into PES of compressed video data and compressed audio data.
(Packetized Elementary Stream) This is a means for separating packets.

The compressed video / audio data decompression unit 107 is a means (MPEG2 decoder) for decoding the separated compressed video data and compressed audio data and decompressing them into the original video / audio signal.

The audio output unit 108 outputs the audio data expanded by the compressed video / audio data expansion unit 107 to the reproduction device 30.
This is a means for converting and outputting a signal form suitable for an interface of a television (for example, a television or a speaker).

The video output unit 109 outputs the video data expanded by the compressed video / audio data expansion unit 107 to the playback device 30.
This is a means for converting and outputting a signal form suitable for an interface (for example, a television or a monitor).

The control section 110 is a means for totally controlling the operation of each section in the digital data reproducing and recording apparatus 100.

The operation input unit 111 is an operation means such as an operation button or a pointing device (touch panel) for inputting an external instruction to the reproducing and recording apparatus 100.

The feature of this embodiment is that, by providing the data format conversion unit 102 in the reproducing and recording apparatus 100, when reproducing the type 1 media 10 and type 2 media 20 having different compression formats, The point is that each part of the data interpretation unit 105 for one, the separation unit 106, the compressed video / audio data decompression unit 107, the audio output unit 108, and the video output unit 109 can be shared.

Next, a specific operation when the digital data reproducing and recording apparatus 100 reproduces and records the type 1 medium 10 and the type 2 medium 20 will be described.

First, a procedure for reproducing data of the type 1 medium 10 in which a movie or the like is recorded in the MPEG2-PS format will be described.

First, referring to FIG. 2, the configuration of the recording data of the type 1 medium 10 will be described. MPEG2-PS
One MPEG2 program stream 200 compressed according to the standard is composed of one or more packs 210 and an end code 22.
0 is included. One pack 210 is provided with the type 1 medium 1 by the type 1 data reading unit 101.
0 data read unit (1 sector, 2 for DVD)
048 bytes). End code 220
Is data indicating the end of the program.

Each pack 210 has a pack header 23
0, a system header 240, and a PES packet 250.

The pack header 230 includes a start code 231 indicating the head of the pack, an ID 232 used to identify whether the pack is the MPEG1 format (value 00) or the MPEG2-PS (value 01), and the digital data. The SCR (System Clock Reference), which is information for setting and calibrating a synchronization signal serving as a time reference in the type 1 data interpretation unit 105, separation unit 106, and compressed video / audio data decompression unit 107 in the playback / recording apparatus 100, = System time reference value) 233 and data including four multiplexing rates 234 which are information indicating the bit rates of compressed video data and compressed audio data multiplexed in packet units. It becomes bytes.

The system header 240 describes the outline of the entire stream (parameter information such as the number of audio channels and the number of video channels), is added to the first pack 210, and is optional for the second and subsequent packs 210.

The PES packet 250 has a start code 252
, A stream ID 253, a packet length 254, and a packet header 251 including time information 255 of reproduction output, and packet data 256. In the case of a DVD, the length is 2034 bytes. Start code 2
52 indicates the head of the PES packet 250.
The stream ID 253 is for identifying whether the data in the PES packet 250 is audio data or video data, or a specific message or command. The packet length 254 indicates the data length of the packet data 256 following this field. The reproduction output time information 255 includes PTS (Presentation Time Stamp = reproduction output time management information) and DTS (Decoding Time Stamp = decoding time management information) used when reproducing the packet data 256 following this field. Time information. Packet data 256
Is actual data of compressed audio information and compressed video information.

Next, referring to FIG. 3, the reproduction processing 3 of the type 1 medium 10 on which the recording data of the above-described configuration is recorded.
00 will be described.

First, in step 310, type 1
Media for type 1 by the data reading unit 101
The data is read and read in packs 210 in order from. Then, in step 320, it is determined whether or not the read data is the end code 220, and if the data is the end code 220, the reproduction process ends. Otherwise, in step 330, the type 1 data interpreting section 105 refers to the start code 231 and multiplex rate 234 in the pack header 230, the start code 252 and the packet length 254 in the packet header 251, and the like. Then, the pack 210 is divided into packets 250. Then, in step 340, the separation unit 106
By referring to the stream ID 253 in the packet header 251 of each PES packet 250 divided by the above, it is identified whether the packet data 256 in the PES packet 250 is video data or audio data, and separated into each. I do. Then, in step 350, each packet data 2 separated by the compressed video / audio data decompression unit 107 while synchronizing the video data and the audio data with reference to the reproduction output time information 255 in the packet header 251.
56 to the original video signal and audio signal,
08 and the video output unit 109 convert the video signal and the audio signal into a signal form suitable for the interface of the reproducing apparatus 30 and output the converted signal form.

Next, the procedure for recording the recording data of the type 1 medium 10 conforming to the MPEG2-PS format on the type 2 medium 20 conforming to the MPEG2-TS format will be described.

First, with reference to FIG. 4, the configuration of the recording data of the type 2 medium 20 conforming to the MPEG2-TS format will be described. The MPEG2 transport stream 400 compressed according to the MPEG2-TS includes one or more fixed-length TS packets 410 of 188 bytes. This is usually shorter than the PES packet 250,
The packet is divided into TS packets 410. this
The TS packet 410 includes a TS header 420 and the data area 43.
It consists of 0. The TS header 420 is a header that stores information on the TS packet 410, and includes at least a synchronization byte 421, a PID (Packet Identification = packet identification information) 422, and an adaptation field control 423.

The synchronization byte 421 is data for detecting the head of the TS packet 410 by means (MPEG2-TS decoder) 107 for decoding data in the MPEG2-TS format. PID
422 is an attribute of the individual stream of the TS packet 410 (for example, PID of video data, PID of audio data, etc.)
Is an identifier indicating The adaptation field control 423 indicates the presence / absence of an adaptation field 450 and the presence / absence of a payload 440 described later in the TS packet 410.

The data area 430 includes the data area 43
0, when only the payload 440 exists, when only the adaptation field 450 exists, when the adaptation field 450 and the payload 440 exist.
There are three types of configurations in the case where exists. The configuration of the data area 430 of the TS packet 410 is determined by the value of the adaptation field control 423.

Here, the payload 440 is the PES
This is information that stores data obtained by dividing the packet 250. The adaptation field 450 is information in which additional information and invalid data bytes relating to the individual stream can be optionally entered. The adaptation field 450 includes at least an adaptation field length 451 and a PCR (Program Clock R).
eference = program time reference value) 452. Adaptation field length 451
Indicates the length of the adaptation field,
Reference numeral 452 denotes information for setting and correcting a synchronization signal serving as a time reference when decoding the compressed video / audio data (similar to the SCR 233).

Next, the MPEG2-PS format data recorded on the type 1 medium 10 is recorded (copied) on the type 2 medium 20 to be recorded in such a data configuration conforming to the MPEG2-TS format. The method is described.

As a recording method, first, the data of the MPEG2-PS format of the type 1 medium 10 is completely converted to the type 2 medium.
The method (1) of converting the data of the medium 20 for MPEG2 into data of the MPEG2-TS format, and the method (2) of recording the data of the MPEG2-PS format of the medium 10 for type 1 in a data format other than the MPEG2-TS format are given. be able to. In the case of method (1),
In order to completely convert the digital data into the recording format of the type 2 medium 20, the digital data can be reproduced and reproduced by a reproducing apparatus of the type 2 medium 2 other than the recording apparatus 100. Conversion method is MPEG2-PS format pack 21
By interpreting the contents of the pack header 230 in 0, the pack is divided into PES packets 250. Then, the PES packet is divided into 184 bytes,
It can be realized by creating and attaching 4 bytes of the TS header 420 to it.

In this embodiment, the recording procedure in the case of the method (2) will be described in detail below.

Referring to FIG. 5, type 1 medium 10
A procedure for converting the data of the type 2 into a format for recording on the type 2 medium 20 and a procedure for recording the data will be described. First, the data of the type 1 medium 10 is read in units of packs 210 by the type 1 data reading unit 101. Then, the data format conversion unit 102 causes the TS packet 410
The pack 210 is divided into a fixed length of 184 bytes similar to the data area 430 of FIG. A 4-byte fixed-length header 510 is added to the divided data 500 to generate a 188-byte fixed-length packet 520. Here, header 510
Is at least the synchronization byte 530 and the recording format ID 54
0 is included. The synchronization byte 530 is data for detecting the head of the packet 520, like the synchronization byte 421 in the TS packet 410. The recording format ID 540 is an MPEG-2 identifier such as a unique identifier indicating that the data 500 has been recorded by the digital data reproducing and recording apparatus 100 or a unique identifier indicating that the recording source is the type 1 medium 10. This is an identifier indicating that it does not conform to the TS format. This recording format ID 54
0 uses a flag that is not used in the TS header 420 in the TS packet 410, or sets a value specific to the used flag, or information specific to the adaptation field 450 instead of the header 510. Can be set.

The divided packet 520 is recorded on the type 2 medium 20 by the type 2 data recording section 103.

Next, a processing procedure 600 for reproducing the type 2 medium 20 recorded according to the recording procedure described above will be described with reference to FIG.

First, in step 610, type 2
The packet 520 is sequentially read and read by the data reading unit 104 for use. Then, in step 620, the data format conversion unit 102
With reference to the recording format ID 540 of the header 510 in the storage medium 20, whether the digital data is recorded by the reproduction and recording apparatus 100 or the recording source is the type 1 medium 10
Is determined. As a result, if the data is not data recorded by the digital data reproducing / recording apparatus 100, or if the recording source is not the type 1 medium 10, error processing such as displaying a screen indicating "cannot be reproduced" is performed in step 625. To end the process. Otherwise, in step 630, one or more data 500 are put together into one pack 210.
Edit to

Thereafter, in step 330, the pack header 230 and the packet header are transmitted by the type 1 data interpreting unit 105 in the same manner as the reproduction of the type 1 medium 10.
The pack 210 is divided into packets 250 with reference to the contents of the header 251. Then, in step 340, the packet data 256 in the packet 250 is video information or audio information with reference to the stream ID 253 in the packet header 251 of each packet 250 divided by the demultiplexing unit 106. Identify them and separate them. In step 350, each packet data 256 separated by the compressed video / audio data decompression unit 107 is decompressed into the original video signal and audio signal, and the audio output unit 108 and the video output unit 109 convert the video signal and the audio signal. The signal is converted into a signal form suitable for the interface of the reproducing apparatus 30 and output.

As described above, the digital data reproducing / recording apparatus 100 includes the data format conversion unit 102 to convert the data of the type 1 medium 10 into a format suitable for the type 2 medium 20 having a different format. It can be converted and recorded. In the reproduction of the type 2 medium 20, the type 1 data interpretation unit 105 and the demultiplexing unit 10 used for reproduction of the type 1 medium 10 are also used.
6, compressed video / audio data decompression unit 107, audio output unit 10
8. Since the video output unit 109 can be shared, the scale of the apparatus can be reduced.

Next, referring to FIG. 7, the data recorded using the digital data reproducing and recording apparatus 100 and the MPC are recorded using another apparatus (apparatus for the type 2 medium 20).
Type 2 that stores data recorded according to EG2-TS
A data reproducing apparatus 700 capable of reproducing the storage medium 20 will be described.

The data reproducing apparatus 700 includes a type 2 data reading section 701, a data determination processing section 702, a type 2 data interpreting section 703, a demultiplexing section 704, a compressed video / audio data expanding section 705, an audio output section 706, Video output unit 707, data conversion / interpretation unit 708, control unit 709,
An operation input unit 710 is provided.

The type 2 data reading section 701 is means for reading the data of the type 2 medium 20 for each TS packet 410 unit.

The data determination processing section 702 determines whether the data read by the type 2 data reading section 701 is data conforming to MPEG2-TS (for example, data recorded by using the above-described reproducing and recording apparatus 100). Or data recorded on the type 1 medium 10).

The data interpreting unit 703 for type 2 determines that the data is
If the data conforms to EG2-TS, the separation unit 704
This is a means for interpreting the contents of the TS header 420 and editing one or more TS packets 410 into a PES packet 250 in order to handle it.

The demultiplexing unit 704 refers to the packet header 251 in the PES packet 250 output from the type 2 data interpreting unit 703 and separates each into compressed video data and compressed audio data. .

The compressed video / audio data decompression unit 705 is means (MPEG2 decoder) for decoding the separated compressed video / audio data and decompressing it into the original video / audio signal.

The audio output unit 706 and the video output unit 707
This is a means for converting the audio data and video data expanded by the compressed video and audio data expansion section 107 into a signal format suitable for an interface of the playback device 30 (for example, monitor, speaker, television, etc.) and outputting the converted signal.

The data conversion / interpretation unit 708 determines that the data has been judged by the data judgment processing unit
If the data does not conform to the TS, the data is edited by the demultiplexing unit 704 to handle the data. The editing method will be described later.

The control unit 709 controls the data reproducing device 70
0 is a means for comprehensively controlling the operation of each unit.

The operation input section 710 is means for inputting an external instruction to the data reproducing apparatus 700, such as an operation button or a pointing device (touch panel).

The feature of this data reproducing apparatus 700 is that a data judgment processing section 702 and a data conversion / interpretation section 708 are provided. Hereinafter, these details will be described.

First, the operation of the data judgment processing unit 702 will be described with reference to FIG. In step 810,
The data in the type 2 medium 20 is read out and read in units of TS packets 410 by the type 2 data reading unit 701, and in step 820, the data is read by referring to the recording format ID 440 of the header 420 in the data. -Judge whether the data conforms to TS. As a result, if the data does not conform to the MPEG2-TS, in step 830, the header 51
0, the pack 210 is restored, and
At 40, the pack 210 is transferred to a PES packet 250.
Convert to

On the other hand, if the data conforms to the MPEG2-TS, in step 850, the type 2 data interpreting unit 703 interprets the contents of the TS header 420, and the data area of one or more TS packets 410. Edit 430 into a PES packet 250. After that, each packet 250 output in step 840 and step 850 is
In step 4, audio data and video data are separated and reproduced.

Also, as shown in FIG.
, The type 2 data reading unit 701
After reading the data in the medium 20 for each TS packet 410, in step 920, the data is output as data conforming to MPEG2-TS to the data interpreting unit 703 for type 2, and the PES packet 250 is generated.
At this time, if the data is successfully generated, the reproduction process is continuously performed. If it cannot be generated normally, step 940
In step 8, the data is output to the data conversion / interpretation unit 708 and converted into data other than the MPEG2-TS format.
It is also conceivable to perform the reproduction process by performing steps 30 to 840.

As described above, the data reproducing apparatus 700
Then, the data determination processing unit 702 and the data conversion / interpretation unit 7
08, the data conforming to the MPEG2-TS and other data (that is, the reproduction and recording device 100
And the recording source is the type 1 medium 10), and the type 2 medium 20 recorded with the recorded data can be reproduced by one reproducing apparatus.

Here, the digital data reproducing and recording apparatus 100 of the above-described embodiment may include a reproducing apparatus 30 such as a monitor or a speaker. Also, type 2
Data recording unit 103 and type 2 data reading unit 1
04 may be shared by another type 2 media playback and recording device. In this case, the reproduction and recording device 100 and the reproduction device 30 are connected to perform recording and reproduction. Further, the data format conversion unit 102 is provided in another type 2 medium reproduction / recording device (including a method of temporarily adding the function of the data format conversion unit 102), and the reproduction / recording device 100 and the reproduction / reproduction. A form for connecting to the device is also conceivable.

Further, as in the embodiment shown in FIG. 10, a digital data reproducing / recording apparatus 1000 of an embodiment in which the digital data reproducing / recording apparatus 100 and the data reproducing apparatus 700 are integrated into one is also conceivable. In this case, the data determination processing unit 702 and the data interpretation unit for type 2 703 are incorporated in the reproducing and recording apparatus 100. Then, as in the data determination processing 800, the type 2 data reading unit 104
Is determined by the data determination unit 702,
Type 2 data for conventional type 2 media
The processing is shifted to the data interpretation unit 703. If the data is the data in which the content of the type 1 medium is recorded, the processing is shifted to the data format conversion unit 102, and thereafter, the same processing as the type 2 medium reproduction processing 600 is performed.

As described above, according to this embodiment, by providing the data format converter 102 in the digital data reproducing and recording apparatus 100, the type 1 medium 1
0 for the type 2 media 2 with different formats
It can be converted into a format that can be recorded as 0 and recorded.
Further, data recorded according to the procedure can be reproduced via the data format conversion unit 102.

In the data reproducing apparatus 700, the data judgment processing section 702 and the data conversion / interpretation section 708 are provided, so that the data recorded in conformity with the format for the type 2 medium 20 and the data recorded in the system 100 are recorded. The type 2 media 20 in which mixed data is mixed can be reproduced.

Further, the digital data reproducing and recording apparatus 1
000, the data determination processing unit 702 and the data conversion / interpretation unit 708 are provided in the reproducing and recording apparatus 100, so that the type 1 medium 10 and the type 2 medium 2
0 can be reproduced by one device.

[0073]

According to the present invention, a playback and recording apparatus having a function for playing back compressed video and audio data conforming to the MPEG2-PS format recorded on a type 1 medium is compliant with the MPEG2-TS format. By providing a data format conversion unit for converting data to a type 2 medium for recording data on a type 2 medium for recording compressed video and audio data, and a data recording unit for recording on a type 2 medium, Media data can be recorded on a type 2 medium.

Further, the provision of the type 2 medium reading section allows the type 2 medium to be reproduced via the data format conversion section. In this case, the type 1 data interpreting unit, demultiplexing unit, compressed video / audio data decompressing unit, audio output unit, and video output unit used for reproducing type 1 media can be shared, thereby reducing the size of the device. Can be.

Also, the MP recorded on the type 2 medium
In a playback device having a function for playing back compressed video and audio data conforming to the EG2-TS format, by providing a data determination processing unit and a data conversion / interpretation unit, the data conforming to the MPEG2-TS format and the data Other data (the data recorded by the reproducing and recording device or the recording source is of type
Type 2 recorded in a mixture of
Media can be played back by one playback device.

Further, MPEG recorded on a type 1 medium
Equipped with a function for playing back compressed video and audio data conforming to the 2-PS format, and converting the data to record the data on a type 2 medium that records compressed video and audio data conforming to the MPEG2-TS format A reproduction and recording device provided with a data format conversion unit and a data recording unit for recording on a type 2 medium is provided with an MPEG2-
By providing a data determination processing unit and a data interpreting unit for type 2 in a reproducing apparatus having a function for reproducing compressed video and audio data conforming to the TS format, both functions can be realized by one apparatus. It becomes possible.

As described above, it is possible to provide a versatile, small-scale apparatus capable of recording and reproducing data between two types of media having different compression formats such as MPEG2-PS and MPEG2-TS. it can.

[Brief description of the drawings]

FIG. 1 is a block diagram of a digital data reproducing and recording apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a recording data configuration of a type 1 medium.

FIG. 3 is a flowchart illustrating a process of reproducing a type 1 medium.

FIG. 4 is a configuration diagram of recording data of a type 2 medium.

FIG. 5 is a flowchart of a process of performing recording on a type 2 medium.

FIG. 6 is a flowchart illustrating a process of reproducing a type 2 medium.

FIG. 7 is a block diagram of a data reproducing apparatus according to another embodiment of the present invention.

FIG. 8 is a flowchart illustrating a process of determining a recording format when reproducing a type 2 medium.

FIG. 9 is a flowchart illustrating a process of determining a recording format during reproduction of a type 2 medium.

FIG. 10 is a block diagram of a digital data reproducing and recording apparatus according to still another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Type 1 media, 20 ... Type 2 media, 30 ... Playback apparatus, 100 ... Digital data recording and playback apparatus, 101 ... Type 1 data readout unit, 102
... Data format conversion unit, 103 ... Type 2 data recording unit, 104 ... Type 2 data reading unit, 105 ... Type 1 data interpretation unit, 106 ... Separation unit, 107 ... Compressed video / audio data decompression unit, 108 ... Audio output unit, 109 ...
Video output unit, 110: control unit, 111: operation input unit.

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hidefumi Goto 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Hitachi Multimedia Systems Development Division

Claims (8)

[Claims] 1. A first reading means for reading compressed video / audio data recorded on a first recording medium for recording compressed video / audio information of a first compression format for each recording unit, and said read recording Interpret the compressed video and audio data for each unit,
First data interpreting means for editing the data in units of expansion, first separating means for separating the data edited in units of expansion into compressed video data, compressed audio data, and various types of information; A data reproducing and recording apparatus for digital data on a first recording medium, comprising: a first decompression means for decompressing the separated compressed video data and compressed audio data to decompress the original video data and audio data. Means for converting the compressed video / audio information of the first recording medium read for each unit into a format recordable on a second recording medium for recording the compressed video / audio information of the second compression format;
Means for recording the converted data on a second recording medium. 2. The recording apparatus according to claim 1, wherein when the compressed video / audio information of the first recording medium read out for each recording unit is recorded on the second recording medium, the data of the recording unit is added to data other than the second compression format. A data reproducing and recording apparatus, comprising: means for attaching an identifier indicating recording in a format. 3. The recording medium according to claim 1, wherein when the compressed video / audio information of the first recording medium read for each recording unit is recorded on the second recording medium, the data of the recording unit is added to the first recording medium. A data reproducing and recording apparatus, comprising: means for attaching an identifier indicating that the content of the data has been recorded. 4. A means according to claim 1, wherein said means for reading compressed video / audio information recorded on said second recording medium for each recording unit in order to reproduce said second recording medium; Means for converting the format of the audio data into recording units in the first recording medium. 5. The apparatus according to claim 4, further comprising means for identifying whether or not the read data is recorded in a format other than the second compression format when reproducing the second recording medium. Characteristic data reproduction and recording device. 6. The apparatus according to claim 4, further comprising means for identifying whether or not the read data is the content of the first recording medium when reproducing the second recording medium. Data reproducing and recording device. 7. A compressed video / audio recorded on a second recording medium for reproducing a second recording medium for recording the compressed video / audio information of the second compression format and the compressed video / audio information of another compression format. Second reading means for reading data for each recording unit, and means for determining whether the compressed video and audio data read for each recording unit is data in the second compression format or information in another compression format And a second data interpreting means for interpreting the contents of the compressed video / audio data of each recording unit when the data is in a second compression format and editing the data into a unit for expanding the data. When the compressed video / audio data of each unit is data of a compression format other than the second compression format, data conversion / interpretation means for interpreting the content, converting and editing the data into the above-mentioned expansion unit, and , In extension unit Second separating means for separating the collected data into compressed video data, compressed audio data, and various types of information; and combining the separated separated compressed video data and compressed audio data into original video data and audio data. And a second decompression means for decompressing the data on a second recording medium. 8. A first read for reading compressed video and audio data recorded on a recording medium for recording on a first recording medium for recording compressed video and audio information in a first compression format for each recording unit. Means, first data interpretation means for interpreting the compressed video and audio data for each recording unit, and editing the data in units of decompression, and converting the data edited for the decompression unit into compressed video data, compressed audio data, A first separating means for separating each type of information and a first decompressing means for decoding separately separated compressed video data and compressed audio data and decompressing them into original video data and audio data; In the data reproducing and recording apparatus of one recording medium, the compressed video and audio information of the first recording medium read for each recording unit is recorded on a second recording medium for recording the compressed video and audio information of a second compression format. it can Means for converting to a format,
Means for recording the converted data on a second recording medium;
Second reading means for reading out the compressed video and audio data recorded on the recording medium for each recording unit, and wherein the compressed video and audio data read for each recording unit is data of a second compression format or other compression format. Means for judging whether the data is of a data format, and, when the compressed video / audio data of each recording unit is data of a second compression format, interpreting the contents thereof,
A second data interpreting means for editing the data into units for decompression, and, when the compressed video / audio data for each recording unit is data in a compression format other than the second compression format, interpreting the contents thereof; A data conversion means for converting and editing the data into the expansion unit and editing the data.