JP2003111023A - Data recorder, data recording method, program and medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a conventional data recorder has caused a user to feel a workload accompanying conversion between the MPEG-TS form and the MPEG-PS form. SOLUTION: A video audio recorder is provided with; an encode section 8 for generating data of a program stream (PS) form on the basis of data of a TS form received externally; and a recording medium input output section 3 that records (a) received data of a transport stream (TS) form onto a recording medium 4, records (b) generated data of a PS form onto the recording medium 4, and records (c) recorded data of the PS form onto the recording medium 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording device for recording a digital TV broadcast program or the like,
The present invention relates to a data recording method, program, and medium.

[0002]

2. Description of the Related Art In recent years, the application of image / audio compression technology has been applied to CD-ROMs, hard disks, DVDs (CD-ROMs, hard disks, and DVDs) of home appliances and computers that are oriented toward the digitization of audio and video from the communication field of transmitting image and audio signals using communication lines. Dig
It is widely used for digital home appliances storage media such as ital Versatile Disc). In particular, MPEG2 (Mov
ing Picture Experts Group
Against the backdrop of standardization of Phase2), this M
A new digital broadcasting service combining PEG2 and communication satellites has started.

Further, in the field of home appliances and computers, in addition to VTRs that have recorded analog signals up to now, MPEG2 that digitally compresses movies, music programs, karaoke, etc.
DVD players for reproducing data are also widely used.
In a DVD player, an optical disc called a DVD is a recording medium for video signals and audio signals. For a device such as a DVD player that only reproduces a DVD,
Video standards are defined.

According to the MPEG2 standard, MPEG-TS (T
MPEG-PS (Program) that records a program based on the transport stream format and one movie, music, or drama program on the storage medium.
There are two types of Stream format. MPEG-TS
Is a broadcasting system or ATM that mainly distributes multiple programs.
(Asynchronous Transfer Mo
de), and the receivers and systems such as digital VTRs also use them. On the other hand, MPEG-PS
Is recorded on a storage medium such as a DVD-ROM,
It is used in personal computers equipped with players and DVD-ROM drives.

Here, in order to record and reproduce the MPEG-TS format broadcast program received by the above-mentioned digital broadcasting service, the receiver is provided with an MPEG-TS compatible decoder (decoder), and a television or the like is provided through the decoder. In general, a reproducing method for outputting to a reproducing apparatus and a recording method for connecting a digital VTR to a receiver and outputting a broadcast program to the digital VTR have been devised.

The VTR was capable of both recording and reproducing data. Until now, DVD players have only been able to reproduce data. It is desirable for the user to be able to record video and audio on a DVD by himself. An apparatus called a DVD video recorder such as a DVD-RAM or a DVD-R can write data on a disk medium, and its market has been established as a randomly accessible recording medium that replaces the conventional VHS standard video tape. Came.

The data received in the MPEG-TS format is
An apparatus for recording in the MPEG-PS format which can be reproduced on a DVD is, for example, a digital disk (DVD recorder) described in JP-A-11-45512 or JP-A-2000-13.
An image / audio recording apparatus described in 8896 has been devised. According to these, in the MPEG-PS format and DV
If the recording is performed so that the recording format is compatible with the D player, the D can be easily reproduced on an ordinary DVD player.
It is possible to provide an apparatus capable of providing a recording medium according to the VD video standard.

As described above, DVD video recorders and the like, which allow the user to perform recording in conformity with the DVD video standard, have begun to rapidly spread. In addition, digital satellite broadcasting has started, and MPEG-TS format data has been converted to MPEG-PS.
If the function of converting to the format is installed, it is possible to configure a DVD video recorder that is converted to a format that can be reproduced by a DVD player and recorded.

More specifically, the above-mentioned JP-A-11-45.
In the DVD recorder described in No. 512, MPEG-TS format data of a broadcast program received by a digital broadcasting service is converted into MPEG-PS format and recorded, and the recorded MPEG-PS format data is transferred to an external device. When it becomes necessary to do so, a method of re-converting the MPEG-PS format data to be transferred into the MPEG-TS format each time has been considered.

[0010]

However, such mutual conversion between the MPEG-TS format and the MPEG-PS format often takes time.

This is due to the difference in the compression format and the like used in each system, but when transferring or dubbing to such other equipment, the MPEG-TS format and the MPEG-PS format are used. The present inventor considers that it is desirable to make the user not aware of the mutual conversion between and.

In consideration of the above-mentioned conventional problems, the present invention takes, for example, the MPEG-TS format and the MPEG-PS.
An object of the present invention is to provide a data recording device, a data recording method, a program, and a medium in which a user's feeling of burden due to mutual conversion between formats is further reduced.

[0013]

[Means for Solving the Problems] The first invention (Claim 1)
Corresponds to the first recording means for recording the first stream data input from the outside as the data of the transport stream format on the predetermined first recording medium, and the input first stream data. Second stream data generating means for generating second stream data as program stream format data based on the above, and second recording means for recording the generated second stream data in the first recording medium. And a data recording device including.

For example, television broadcasting data in TS format such as BS digital broadcasting can be converted into PS format which can be easily reproduced by a DVD player while reproducing and recording the received information without damaging the received information. Therefore, data that can be easily reproduced by a PS format DVD player or the like can be generated at the same time when the television broadcast data is received and reproduced.

The second aspect of the present invention (corresponding to claim 2) is the first recording for recording the first stream data inputted from the outside as the data of the transport stream format on the predetermined first recording medium. Means and said recorded first
Second stream data generating means for generating second stream data as program stream format data based on the stream data; and the second generated stream data.
A data recording apparatus comprising: a second recording unit for recording stream data on the first recording medium.

[0016] For example, the TS format television broadcast data such as BS digital broadcast is reproduced without damaging the received information, and after the completion of recording, the time during which recording or non-reproduction is performed is checked by a DVD player or the like. It can be converted to a PS format that is easy to play. Therefore, PS format DVD
It is possible to generate data that can be easily reproduced by a player or the like. If recording or playback can be started, if it has a function to interrupt the conversion work currently being executed, it can be resumed after being interrupted once, so there is an effect that conversion can be done at any time without spending a lot of time on conversion. To be

The third aspect of the present invention (corresponding to claim 3) is the first recording for recording the first stream data input from the outside as the data of the transport stream format on the predetermined first recording medium. Means and said recorded first
Second stream data generating means for generating second stream data as program stream format data based on the stream data; and the second generated stream data.
A data recording apparatus comprising: a second recording unit for recording stream data on a predetermined second recording medium.

For example, when it is desired to reproduce TS format television broadcast data such as BS digital broadcast without damaging the received information and to make PS format stream data after recording is completed and to record it on the second recording medium. Convert.
Therefore, only the TS format stream data need be recorded on the first recording medium. This is effective when the recording capacity of the first recording medium is limited and cannot be increased.

According to a fourth aspect of the present invention (corresponding to claim 4), the generation of the second stream data is performed by using data before overlapping the on-screen display (OSD) data. The data recording apparatus according to any one of the present inventions.

For example, when reproducing a received television broadcast, reception channel information and audio information (stereo broadcast, multi-channel broadcast, multi-language broadcast, etc.)
Etc. may be displayed as an OSD display in an overlapping manner on the playback screen. However, if these OSD displays are not superimposed and recorded on an image or the like when recorded on a recording medium in the PS format, it will look good when reproduced later. Also, when the compression recording format is changed between the TS format and the PS format, it may be inconvenient to record the original TS format information as it is. For example, when receiving multilingual broadcasting, when converting to Japanese only in PS format,
It does not make sense even if the indication of multiple languages is recorded when the relevant part of the PS format is played back. Therefore, unnecessary display information can be deleted by generating a PS format stream from the image data before the OSD display is overlaid.

In a fifth aspect of the present invention (corresponding to claim 5), the second stream data is generated by a compression method in which the compression method of the first stream data is not defined by the DVD video standard or the DVD video recording standard. In the case of the method, any one of the first to third books, which is performed by decoding the first stream data once and then encoding it with a compression method defined by the DVD video standard or the DVD video recording standard. It is a data recording device of the invention.

For example, it is assumed that the DVD video standard or the DVD video recording standard is supported. In that case, the structure of the data such as the recorded audio signal needs to be encoded by the compression method defined by the DVD video standard or the like. However, digital TV
When the compression method of the audio input in broadcasting etc. is different from this, the received audio must be decoded once, and then compressed and encoded in a method conforming to the above standards. For example, the audio compression method used in BS digital broadcasting is MPEG2-AAC (Advanced Audio).
o Coding, abbreviated as AAC system), and is recorded by the Dolby Digital system (common name is used and abbreviated as AC3 system) in the DVD video standard and the like. Therefore, the TS format stream data received by a method not used in the DVD standard or the like can be recorded on the recording medium by a compression method that can be further reproduced by the DVD in the PS format.

According to a sixth aspect of the present invention (corresponding to claim 6), the second stream data is generated by sampling the first stream data which is not defined by the DVD video standard, the DVD audio standard or the DVD video recording standard. In the case of data sampled at a frequency, after the first stream data is once decoded, the frequency is converted to a sampling frequency defined by the DVD video standard, the DVD audio standard, or the DVD video recording standard. The data recording apparatus according to any one of the first to third aspects of the present invention, which is performed by encoding.

For example, it is assumed that the DVD video standard, the DVD video recording standard, and the DVD audio standard are supported. In that case, the structure of the data such as the recorded audio signal needs to be encoded with the data of the sampling frequency defined by the DVD video standard (in the case of compressed data, after decoding it). Of the sampling frequency when converted to linear PCM). However, if the sampling frequency of the audio input in digital TV broadcasting or the like is different from this, it is necessary to decode the received audio once and then resample and encode the audio in a method conforming to the above standards. For example, the sampling frequency used in BS digital broadcasting includes 32 KHz and 48 KHz, but only 48 KHz in the DVD video standard and the DVD video recording standard. Even the DVD audio standard cannot handle 32 KHz. Therefore, the TS format stream data received by a method not used in the DVD standard or the like can be recorded on the recording medium with the PS format data sampled at the sampling frequency that can be reproduced by the DVD.

According to a seventh aspect of the present invention (corresponding to claim 7), in the generation of the second stream data, the first stream data is a pixel which is not defined by (1) DVD video standard or DVD video recording standard. If there is a number, or (2) the DVD video standard or the DV
If the number of pixels is determined by the D-video recording standard, but the number of pixels different from that of the first stream data is to be used for encoding, the first stream data is decoded once and then the DVD-video standard or The data recording apparatus according to any one of the first to third aspects of the present invention, which is performed by converting the number of pixels to a number defined by the DVD video recording standard and then encoding.

For example, it is assumed that the DVD video standard or the DVD video recording standard is supported. In that case, the structure of the data such as the recorded image signal needs to be encoded with the data of the number of pixels defined by the DVD video standard or the like. However, if the number of pixels of an image input in digital TV broadcasting or the like is different from this, it is necessary to decode the image once, then convert it into a pixel conforming to the above standard, and encode it. For example, the number of HD format pixels used in BS digital broadcasting is 1920 (horizontal) × 1080 (vertical), and is 720 (horizontal) × 480 (vertical) in the normal DVD video standard and DVD video recording standard. .

Even if the number of pixels of the image data input by TS is 720 (horizontal) × 480 (vertical) NTSC system, in order to make this into the PS format of the PAL system DVD video standard. , 720 (horizontal) x 576
It is necessary to convert to the number of (vertical) pixels. Therefore DVD
If the number of pixels that is not used in the standard is received, or if you want to record with a number of pixels that is different from the number of pixels that are received, set the stream data of the received TS format to the number of pixels that can be played back on DVD in PS format. After conversion, it has the effect that it can be re-encoded and recorded on a recording medium.

In an eighth aspect of the present invention (corresponding to claim 8), the second stream data is generated by using an encoding based on the DVD video standard, and has predetermined additional information defined by the DVD video standard. The data recording apparatus according to any one of the first to third aspects of the present invention, which is additionally recorded.

In a ninth aspect of the present invention (corresponding to claim 9), the second stream data is generated by using an encoding based on the DVD video recording standard, and the DV data is generated.
The data recording apparatus according to any one of the first to third aspects of the present invention, in which predetermined additional information defined by the D video recording standard is added and recorded.

For example, assume that the DVD video recording standard is supported. In that case, in order to reproduce the recorded data, it is necessary that the data is recorded in a file structure defined by the DVD video recording standard. For example, when it is desired to reproduce PS format stream data recorded on a recording medium according to time information,
It is necessary to create and write a time map in which address information corresponding to each time stamp defined in the DVD video recording standard is collected. Therefore, it is necessary to encode in PS format and generate and write time map information. Therefore, additional information such as time map information unique to the DVD video recording standard is created at the same time as encoding and recorded on a recording medium, so that when the recording medium is reproduced by a DVD video recorder or the like, reproduction of a designated time point can be appropriately performed, It has the function of being able to edit.

In a tenth aspect of the present invention (corresponding to claim 10), the second stream data is generated by using an encoding based on the DVD audio standard, and has predetermined additional information defined by the DVD audio standard. The data recording apparatus according to any one of the first to third aspects of the present invention, which is additionally recorded.

For example, assume that the DVD audio standard is supported. In that case, in order to reproduce the recorded data, it is necessary to record the data in a file structure defined by the DVD audio standard. For example, it is necessary to add information so that PS format stream data recorded on a recording medium can be accessed in units of titles or tracks. That is, when it is desired to divide a title corresponding to an album such as a CD and tracks corresponding to a plurality of songs in one album and perform designated playback according to the navigation information composed of the title and tracks, the navigation defined by the DVD audio standard is performed. You have to create and fill in the information. Therefore, it is necessary to encode the PS format and generate and write navigation information. Therefore, additional information such as navigation information consisting of titles and tracks unique to the DVD audio standard is created at the same time as encoding and recorded on a recording medium, so that when the recording medium is played back by a DVD audio player or the like, it is possible to appropriately specify a track for playback. It has the effect of being able to.

The eleventh invention (corresponding to claim 11) is
The data recording device according to any one of the first to third aspects of the present invention, wherein the second stream data is generated by using an encode having a compression ratio calculated in consideration of the capacity of the second recording medium. Is.

For example, it is assumed that the DVD video standard is supported. When recording, make a reservation recording etc. first
Consider the case where the program broadcast time for receiving the stream data is known in advance, and the recordable capacity of the recording medium for recording the second stream data is known in advance. Further, when the recording medium for recording the second stream data is a detachable DVD disc, there is a demand to store one reserved program in one disc.
In such a case, one movie program may be recorded with the highest image quality and the full recording capacity of the disc. Therefore, there is an effect that the compression ratio of the image data or audio data of the recorded program is calculated from the recordable capacity of the recording medium and one program can be recorded at a bit rate (low compression rate) as high as possible.

The twelfth aspect of the present invention (corresponding to claim 12) is
The first recording medium is the data recording device according to the first or second aspect of the present invention, which is a hard disk that cannot be freely attached and detached and can be rewritten many times.

For example, the digital TV broadcast has a function of recording the first stream data in the TS format.
The TS format stream data recorded on the recording medium is
Data may be sent to another video device or the like via the communication function, and the other video device may decode and reproduce the TS format stream data. As described above, in the case of transmitting / receiving the stream data of the TS format via the communication function, the recording medium itself may not be removable and may be a fixed one such as a hard disk. Alternatively, if the data should not be tampered with, it may be more convenient if it is fixed.

Furthermore, not only the TS format but also the PS format stream data may be recorded on the recording medium.
In some cases, the PS format stream data is once recorded in a hard disk, and is transmitted to another writing device via the communication function so that the partner device writes the PS format stream data. . Even in such a case, the recording medium need not be removable.
Therefore, when the recording medium operates not only by itself but also by another device through a communication function, the recording medium is of a fixed type such as a hard disk, and can be stored in a batch management that is hard to be tampered with.

The thirteenth invention (corresponding to claim 13) is
The first recording medium is the data recording device according to the first or second aspect of the present invention, which is an optical disc or a semiconductor card that can be freely attached and detached and can be rewritten many times.

For example, a digital TV broadcast is received and TS
It has a function of converting the first stream data of the format into a data stream of the second PS format and recording the converted second stream data on a removable recording medium.
If the removable recording medium is a medium such as a DVD-RAM and recording is performed according to the DVD video recording standard, it is possible to generate a DVD video recording standard disc that can be easily reproduced by another DVD video recorder. Have.

Furthermore, not only the PS format but also the TS format stream data may be recorded on the recording medium.
If the received TS format stream data contains copyright information indicating that copying is not possible, the data cannot be transmitted via a communication function or the like, so the recording medium on which the stream data is recorded should be inserted as it is. There are some cases. As described above, it has an effect of being able to deal with the case where the copyright information is strict in the TS format.

The fourteenth invention (corresponding to claim 14) is
The first recording medium is a hard disk that cannot be freely detached and rewritable any number of times, and the second recording medium is (1) freely detachable and (2) any number of times. A third embodiment of the data recording device of the present invention is a rewritable or once-writable optical disk or semiconductor card.

For example, the first stream data in the TS format is once constructed by a hard disk or the like and recorded. Then, after performing editing work or the like from the first stream data in the TS format, cutting unnecessary portions, etc., a removable second recording medium is connected so that the data can be written while being converted. Rewritable and rewritable DVD-RAM and DVD-RW format data
The present invention can be applied not only to a recording medium such as that described above, but also to a recording medium such as a DVD-R that can be written only once. If a recording medium that can be written only once is cheaper than a recording medium that can be rewritten many times, it has an effect that it can be used for storage using this recording medium.

The fifteenth invention (corresponding to claim 15) is
3. The data recording apparatus according to claim 1, further comprising a third recording unit for recording the recorded second stream data on a predetermined second recording medium.

For example, the TS format first stream data is once converted and the PS format second stream data is recorded on the same first recording medium. After editing the PS format second stream data, cutting unnecessary parts, etc., a removable second recording medium can be connected and written out. The stream data to be reproduced can be put in the second recording medium, and only the data to be used for editing or the data which is erased once seen can be put in the first recording medium. Therefore, it is possible to obtain the effect that the recording medium can be selectively used according to the intended use.

The sixteenth invention (corresponding to claim 16) is
The first stream data has copyright information including information on copy recording, and the second stream data has
Looking at the information regarding the copy recording, (1) the first stream data is recorded and decoded when the copy recording is possible, and (2) the first stream data is decoded when the number of times of the copy recording is not limited. The data recording apparatus according to the first aspect of the present invention, which is generated by encoding the first stream data and is recorded on the first recording medium.

The seventeenth invention (corresponding to claim 17) is
The first stream data has copyright information including information on copy recording, and the second stream data has
Looking at the information relating to the copy recording, (1) if the copy recording is possible, recording the first stream data, decoding the recorded first stream data,
(2) In the data recording apparatus according to the second aspect of the present invention, which is generated by encoding the decoded first stream data and recorded on the first recording medium when the number of times of copy recording is not limited. is there.

The eighteenth invention (corresponding to claim 18) is
The first stream data has copyright information including information on copy recording, and the second stream data has
Looking at the information relating to the copy recording, (1) if the copy recording is possible, recording the first stream data, decoding the recorded first stream data,
(2) In the data recording apparatus according to the third aspect of the present invention, which is generated by encoding the decoded first stream data and recorded on the second recording medium when the number of times of copy recording is not limited. is there.

The nineteenth invention (corresponding to claim 19) is
Recording first stream data externally input as transport stream format data on a predetermined first recording medium; and a second stream as program stream format data based on the input first stream data. A data recording method comprising: a step of generating data; and a step of recording the generated second stream data on the first recording medium.

The twentieth invention of the present invention (corresponding to claim 20) is
Recording first stream data input from the outside as transport stream format data on a predetermined first recording medium; and a second stream as program stream format data based on the recorded first stream data. A data recording method comprising: a step of generating data; and a step of recording the generated second stream data on the first recording medium.

The twenty-first invention (corresponding to claim 21)
Recording the first stream data input from the outside as transport stream format data on a predetermined first recording medium, and recording the first stream data as program stream format data based on the recorded first stream data. Generating a second stream data, and generating the second stream data by a predetermined second stream data.
And a step of recording on a recording medium.

Twenty-second invention (corresponding to claim 22)
Recording the first stream data externally input as transport stream format data in a predetermined first recording medium in the data recording method according to the nineteenth aspect of the present invention; All or part of a step of generating second stream data as program stream format data based on the stream data and a step of recording the generated second stream data in the first recording medium are executed by a computer. It is a program to let you.

The twenty third invention (corresponding to claim 23)
Recording the first stream data input from the outside as transport stream format data in a predetermined first recording medium in the data recording method according to the twentieth aspect of the present invention; All or part of a step of generating second stream data as program stream format data based on the stream data and a step of recording the generated second stream data in the first recording medium are executed by a computer. It is a program to let you.

24th invention (corresponding to claim 24)
Is a step of recording the first stream data input from the outside as data of a transport stream format in a predetermined first recording medium in the data recording method according to the twenty-first aspect of the invention; Second data as program stream format based on one stream data
It is a program for causing a computer to execute all or part of the step of generating stream data and the step of recording the generated second stream data in a predetermined second recording medium.

The twenty-fifth invention (corresponding to claim 25)
Recording the first stream data externally input as transport stream format data in a predetermined first recording medium in the data recording method according to the nineteenth aspect of the present invention; All or part of a step of generating second stream data as program stream format data based on the stream data and a step of recording the generated second stream data in the first recording medium are executed by a computer. It is a medium carrying a program for causing it to be processed by a computer.

The twenty-sixth invention (corresponding to claim 26)
Recording the first stream data input from the outside as transport stream format data in a predetermined first recording medium in the data recording method according to the twentieth aspect of the present invention; All or part of a step of generating second stream data as program stream format data based on the stream data and a step of recording the generated second stream data in the first recording medium are executed by a computer. It is a medium carrying a program for causing it to be processed by a computer.

The twenty-seventh invention (corresponding to claim 27)
Is a step of recording the first stream data input from the outside as data of a transport stream format in a predetermined first recording medium in the data recording method according to the twenty-first aspect of the invention; Second data as program stream format based on one stream data
A medium carrying a program for causing a computer to execute all or part of the step of generating stream data and the step of recording the generated second stream data in a predetermined second recording medium, It is a medium that can be processed by a computer.

[0057]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) First, referring mainly to FIG. 1 which is a block diagram showing a configuration of an image / audio recording apparatus according to Embodiment 1 of the present invention, an image / audio recording apparatus (DVD) of this embodiment will be described. The configuration of the video recorder) will be described.

The video / audio recording apparatus of this embodiment is provided with an encoder 8 for generating program stream (PS) format data based on TS format data input from the outside, and (a) input. Recording of transport stream (TS) format data on the recording medium 4,
A recording medium input / output unit 3 for (b) recording the generated PS format data on the recording medium 4 and (c) recording the recorded PS format data on the recording medium 5. There is.

The recording medium input / output unit 3 of the present embodiment
Corresponds to the means including the first to third recording means of the present invention, and the encoding section 8 corresponds to the second stream data generating means of the present invention. The recording medium 4 corresponds to the first recording medium of the present invention, and the recording medium 5 corresponds to the second recording medium of the present invention.

Next, the operation of the video / audio recording apparatus of the present embodiment will be described. It should be noted that an embodiment of the data recording method of the present invention will be described while the operation of the image / audio recording apparatus of the present embodiment is described (the same applies to the following embodiments).

The DVD video recorder of this embodiment is I
This is a device for converting MPEG-TS format stream data transmitted by the EEE 1394 bus into MPEG-PS format data and writing or reproducing the data on a DVD disc. First, from the set top box (hereinafter abbreviated as STB) connected by an IEEE 1394 bus or the like, which is a high-speed serial bus, to the input unit 1, T
Stream data of S format is input. This STB
Has a function of receiving digital stream data from communication satellites such as BS and CS.

The packet data sent from the IEEE 1394 is a 192-byte packet in which a 4-byte time stamp is added to the original TS packet. The input unit 1 removes the time stamp of the received TS packet and generates a new 188-byte packet. This one
Packets that are 88-byte TS format streams are
It is composed of a 4-byte fixed length TS header and a data area. The TS header contains a synchronization byte indicating the beginning of the packet and a packet identifier (PID: PacketIden).
information) is included. Various data shown in FIG. 2 are stored in the data area in units of TS packets. In the example of FIG. 2, when two programs per channel are time-division multiplexed and broadcast,
-It shows various data transmitted as a TS.

The program data in FIG. 2 is image and audio data of each program which is time-division multiplexed and broadcast. See also PSI
(Program Specific Information
data) is data necessary for program selection, and PA
T (Program Association Tab)
le), PMT (Program M) corresponding to each program
ap Table), NIT (Network Inf)
information table). Unique PIDs are assigned to these program data and PSI data as shown in FIG. 2, and they are time-division multiplexed in TS packet units. Therefore, the data type stored in the data area in the TS packet can be identified by looking at the PID of the TS packet.

The demultiplexing unit 2 refers to the PID of the TS packet sent from the program distributor, and PID = “0”
Only the TS packet of is separated and the PAT of the channel selected by this device is accepted. In this PAT,
The PMT PID corresponding to the program number "1" desired to be received is acquired. Then, the PID in each TS packet is referred to, only the TS packet designated by the PID is separated, the PMT corresponding to this program number “1” is received, and the image data and audio corresponding to the program number “1” are received. Get the data.
Then, the separation unit 2 separates the image elementary stream data and the audio elementary stream data for the program desired by the viewer from other parts based on these PIDs.

From the demultiplexing unit 2, the multiplexed MPEG-
From the TS format, TS format stream data including compressed image data, compressed audio data, and the like for a specific program is recorded on the recording medium 4 from the recording medium input / output unit 3. The recording medium 4 can be composed of a rewritable hard disk, an optical disk such as a DVD-RAM, or a semiconductor medium.

The stream data of the TS format recorded on the recording medium 4 is sent to other video equipment or the like via a communication function (not shown) of the video / audio recording apparatus, and the other video equipment. Alternatively, TS format stream data may be decoded and reproduced. As described above, in the case of transmitting / receiving the stream data of the TS format via the communication function, the recording medium 4 itself may not be removable and may be a fixed one such as a hard disk. Alternatively, if the data should not be tampered with, it may be more convenient if it is fixed.

On the other hand, in some cases, the removable recording medium 4 is convenient. If the received TS format stream data contains copyright information indicating that copying is not possible, the data cannot be transmitted via a communication function or the like, so the recording medium on which the stream data is recorded should be inserted as it is. There are some cases. In this way, it is possible to deal with the case where the copyright information is strict in the TS format.

From the demultiplexing unit 2, the multiplexed MPEG-
TS format stream data including compressed image data and compressed audio data for a specific program from the TS format is output to the decoding section 6 via the recording medium input / output section 3. Alternatively, the TS format stream data once recorded on the recording medium 4 is output to the decoding unit 6 via the recording medium input / output unit 3.

The decoding unit 6 has a portion for decompressing the compressed data and converts it into a signal format that can be output from the AV output unit 7. Time information called a program clock reference (abbreviated as PCR) is added to the stream data in TS format. The decoding unit 6 adjusts, for example, a reference clock for image reproduction from this PCR, and executes reproduction without interruption. Also for audio A
Data compressed with AC etc. is decompressed and PCM (Pul
se Code Modulation). The AV output unit 7 converts the digital image and sound data output from the decoding unit 6 into an analog signal using a DA converter or the like, and outputs the analog data.

When reproducing the stream data of the TS format such as the received television broadcast when outputting the image, for example, the receiving channel information and the audio information (stereo broadcasting, multi-channel broadcasting, multilingual broadcasting, etc.) are used. In some cases, such as () is displayed as an OSD display in an overlapping manner on the playback screen. Raw image data having no OSD display information superimposed on the data transferred from the decoding unit 6 to the encoding unit 8 is preferable.

It is better that these OSD displays are not superposed and recorded on an image or the like when recorded on the recording medium in the PS format re-encoded in the PS format by the encoding unit 8.
It looks good when played back later. Also TS format and P
When the compression recording format is changed in the S format, it may be inconvenient to record the original TS format information as it is. For example, if you are receiving a multilingual broadcast and converted to Japanese only in PS format,
It does not make sense even if a multilingual display is recorded when the relevant part of the format is played back. Therefore, by generating a PS format stream from the image data before the OSD display is superimposed, unnecessary display information is not encoded.

In the encoding unit 8, the decoding unit 6
At the same time that the stream data of the format is reproduced, the stream data of the PS format is generated. The generated PS format stream data is recorded on the recording medium 4 from the recording medium input / output unit 3. The PS format stream data recorded on the recording medium 4 is recorded in a format conforming to the DVD video standard, the DVD video recording standard, etc., in order to consider reproduction by a DVD player or the like.

It should be noted that the recording medium input / output unit 3 includes a recording medium 4
Has a buffer memory necessary for high-speed recording, and has access speed performance for accessing each recording position, recording speed performance for recording each stream,
Also, a high-speed input / output function of double speed or higher, which has a sufficiently high transfer rate performance for inputting / outputting with other devices, is mounted. Therefore, the recording medium input / output unit 3 uses the MPEG-T
The recording of the S format stream data and the recording of the MPEG-PS format stream data generated by the encoding unit 8 can be performed simultaneously (of course, not only the simultaneous recording of two streams but also the recording of one stream). And it is possible to play or record two or more streams simultaneously, such as playing one stream).

It is assumed that the DVD video standard or the DVD video recording standard is supported. In that case, the structure of the data such as the audio signal recorded on the recording medium 4 needs to be encoded by the compression method defined by the DVD video standard or the like. However, if the compression method of the audio input in digital TV broadcasting or the like is different from this, it is necessary to decode the received audio once and then compress and encode it in a method that conforms to the above standards. For example, the audio compression method used in BS digital broadcasting is the AAC method, and the DVD video standard, etc.
It is recorded by the AC3 system or the like. Therefore, as shown in FIG.
A received by a method not used in the DVD video standard, etc.
The stream data in the TS format of the AC system is once decoded by the audio decoding unit 11 in the decoding unit 6, and PCM
The audio data is encoded by the audio encoding unit 13 in the encoding unit 8 to convert it into a format that can be recorded on the recording medium 4 by converting it to a PS format and reproducing it on a DVD.

Further, the conversion from the TS format to the PS format will be described. Video and audio recorder is DVD
Video standard or DVD video recording standard, D
It is assumed that the VD audio standard is supported. In that case, the structure of the data such as the audio signal recorded on the recording medium 4 needs to be encoded with the data of the sampling frequency defined by the DVD video standard (in the case of compressed data, , Sampling frequency when it is converted to linear PCM after decoding it). However, if the sampling frequency of the audio input in digital TV broadcasting or the like is different from this, it is necessary to decode the received audio once and then resample and encode the audio in a method conforming to the above standards. For example, the sampling frequencies used in BS digital broadcasting include 32 KHz and 48 KHz,
The DVD video standard and the DVD video recording standard are only 48 KHz. Even the DVD audio standard cannot handle 32 KHz. Therefore, the TS format stream data received by a method not used in the DVD standard or the like can be recorded on the recording medium with the PS format data sampled at the sampling frequency that can be reproduced by the DVD. This sampling conversion unit 13
Is configured in the encoding unit 8, and if the sampling frequency of the input audio differs from that of each DVD standard, this is sample-converted and encoded.

The same applies not only to audio but also to images. For example, it is assumed that the video / audio recording apparatus described above is compatible with the DVD video standard or the DVD video recording standard. In that case, the structure of the data such as the image signal recorded on the recording medium 4 needs to be encoded by the data of the number of pixels defined by the DVD video standard or the like. However, if the number of pixels of an image input in digital TV broadcasting or the like is different from this, it is necessary to decode the image once, then convert it into a pixel conforming to the above standard, and encode it. For example, the number of HD format pixels used in BS digital broadcasting is 1920
(Horizontal) × 1080 (vertical), which is 720 in the normal DVD video standard or DVD video recording standard.
(Horizontal) × 480 (vertical).

Even if the number of pixels of the image data input by TS is 720 (horizontal) × 480 (vertical) NTSC system, in order to make this into the PS format of the PAL system DVD video standard, It is necessary to convert into the number of pixels of 720 (horizontal) × 576 (vertical). Therefore, if the number of pixels that is not used in the DVD standard is received, or if you want to record with a number of pixels that is different from the number of pixels that have been received, the received TS format stream data can be further reproduced in DVD in PS format. After being converted into a number, it is re-encoded and recorded on the recording medium 4.

Further, the support for the DVD video standard will be described. In that case, in order to reproduce the data recorded on the recording medium 4 of the above-mentioned audiovisual recording apparatus, a DVD is used.
It must be recorded in the file structure specified by the video standard. For example, when it is desired to fast-forward the PS format stream data recorded on the recording medium 4, address information indicating preceding and following video reproduction units must be written for navigation prescribed in the DVD video standard. Therefore, it is necessary to encode in PS format, generate navigation information, and embed it in a required position. Therefore, the additional information such as the navigation information unique to the DVD video standard is created at the same time as the encoding and recorded on the recording medium 4, so that the recording medium 4 can be recorded in the DV format.
During playback on a D player or the like, fast-forward playback can be appropriately performed.

FIG. 4 shows the MPEG-PS format which is presentation data defined by the DVD video standard. A PS format stream is converted into VOB (Vid
Call it eoObject). The VOB is divided into cells, which are playback control units from navigation. Ce
ll is VOBU (Video Object Uni) which is the minimum access unit of presentation data.
t). VOBU is an NV_PCK (Naviga) that contains navigation information for playback.
section pack) and V for video data
_PCK (Video Pack) and A_PCK (Audio Pack) for audio data are included. Reference numeral 21 in FIG. 4 indicates a PS format stream,
23 and 24 are NV_PCK, 25 is V_PCK, 2
6 indicates A_PCK. Also from 22 NV_PCK,
1 VOBU is located just before the NV_PCK of 23. The size of the pack in the DVD video standard is the size of one sector which is a unit for reading data from a DVD disc, that is, 2048 bytes. 1Pack consists of 1 packet excluding NV_PCK. NV_PCK is PCI (Pres
entation Control Information
Ion) packet and DSI (Data Search)
Information) packet.

FIG. 5 shows the contents of DSI in which address information for reproduction control is stored in NV_PCK.
Will be described with reference to. FIG. 5 shows a DSI packet 31 which is address information prepared for special reproduction. V_PCK after NV_PCK is normally DV
The compressed image data of the I picture in the D video standard is written at the beginning. That is, if the address information in which the next NV_PCK is stored is known, the location in which the I picture is stored can be specified. Therefore, it is composed of a jump destination VOBU address corresponding to variable speed fast forward and rewind.

From the NV_PCK 23 in FIG. 4, the NV_PCK 22 immediately before is described in the previous VOBU address 37, and the NV_PCK 24 after 1 is described in the next VOBU address 36. Similarly, when one VOBU is designed as a reproduction unit of 0.5 seconds, VOBU addresses before and after 0.5 seconds, 1 second, etc. are described. In this way, fast-forwarding can be realized by playing back the points indicated by this address one after another in fast-forwarding reproduction or the like.
Further, the reference picture # 1 end address 32 in FIG.
V_PC in which the final data of the first encoded reference picture (first I picture) after the I packet is described
The address of K is described. Further, the reference picture # 2 end address 33 describes the address of V_PCK in which the final data of the second coded reference picture (I picture or P picture) after the DSI packet is described. Therefore, by referring to the desired NV_PCK address information and the DSI packet of the NV_PCK, the data recording position of the I picture can be identified.

Therefore, when recording on the recording medium 4 according to the DVD video standard, the encoding section 8 needs to record while adding the NV_PCK information. It's not just about creating video and audio streams.

Further, the correspondence to the DVD video recording standard will be described. In that case, in order to reproduce the data recorded on the recording medium 4 of the above-mentioned video / audio recording device, it is necessary to record the data with a file structure defined by the DVD video recording standard. For example, when the PS format stream data recorded on the recording medium 4 is to be specified and reproduced in accordance with the time information, a time map is created and written, in which address information corresponding to each time stamp defined in the DVD video recording standard is created. I have to go. Therefore, the encoding unit 8
It is necessary to encode in S format and generate and write time map information. Therefore, additional information such as time map information unique to the DVD video recording standard is created at the same time as encoding and recorded on a recording medium, so that when the recording medium is reproduced by a DVD video recorder or the like, reproduction of a designated time point can be appropriately performed, You can edit.

The DVD video recording standard is premised on a system for performing real-time recording.
According to the video recording standard, NV_PCK is not used, but the playback time of all VOBUs, size information, and size information of the first I picture are managed and used for stream access. As shown in FIG. 6, VOBI (VOBI
information 41, the pointer information indicating the address of the VOBU, the reproduction time TIME of one VOBU 42, the size information SIZE, and the size I-SIZE of the leading I picture are described. This serves as mapping information of where the stream data 51 is located.
Fast-forward reproduction can be realized by sequentially sending only the data necessary for decoding the head I picture of the VOBU to be displayed to the decoding unit 6 using these pieces of information. At the time of real-time recording, these pieces of information can be added by holding these pieces of information in a memory that can be referred to by the encoding unit 8 and writing them to the recording medium 4 after the end of recording. About 0.5 second is adopted as one unit of this VOBU. However, a smaller value may be taken if the capacity of the encoder or decoder is increased.

Therefore, when recording on the recording medium 4 according to the DVD video recording standard, the encoding section 8
It is necessary to temporarily store the reproduction information of all VOBU units in a memory or the like and record the video or audio data at the time of completion of recording. It's not just about creating video and audio streams.

Further, the support for the DVD audio standard will be described. In that case, in order to reproduce the data recorded on the recording medium 4 of the above-mentioned audiovisual recording apparatus, the DV is recorded.
It must be recorded in the file structure defined by the D audio standard. For example, the PS recorded on the recording medium 4
It is necessary to add information so that the format stream data can be accessed in units of titles or tracks. That is, when it is desired to divide a title corresponding to an album such as a CD and tracks corresponding to a plurality of songs in one album and perform designated playback according to the navigation information composed of the title and tracks, the navigation defined by the DVD audio standard is performed. You have to create and fill in the information. Therefore, while encoding in PS format,
It is necessary to generate and write navigation information. Therefore, additional information such as navigation information consisting of titles and tracks unique to the DVD audio standard is created at the same time as encoding and recorded on a recording medium, so that when the recording medium is played back by a DVD audio player or the like, it is possible to appropriately specify a track for playback. Can be done.

The navigation in the DVD audio standard basically inherits the method of the DVD video standard. However, there is a plurality of title groups corresponding to one conventional CD based on the concept of one disc as an album and continuous reproduction. And one title can have up to 99 tracks. A DVD audio disc can be played by designating a designated song by the user designating a title number and a track number. The DVD audio standard has no moving image in principle. Still images are the basics. Therefore, it is assumed that only audio voice is re-encoded. At that time, it is necessary to create a song image, set the title and track, and record the encoded audio data. Therefore, the encoding unit 8
When recording on the recording medium 4 in the D audio standard, it is necessary to record the position information corresponding to the title or track from the audio stream data at the time of completion of recording the audio data. It doesn't just generate streams for audio.

In the above video / audio recording apparatus, when the first stream data is decoded and the second stream data is generated and recorded on the recording medium 4 such as a DVD, the recordable capacity of the recording medium 4 is set. In view of this, the compression ratio of the recordable image data or audio data is calculated and encoded from the recordable capacity.

It is assumed that the video / audio recording apparatus described above is compatible with the DVD video standard and the like. For example, consider a case where the program broadcast time for receiving the first stream data is known in advance by reservation recording or the like, and the recordable capacity of the recording medium for recording the second stream data is known in advance. Further, when the recording medium 4 for recording the second stream data is a detachable DVD disc, in order to meet the demand to store one reserved program in one disc, one movie program is provided with the highest image quality. Then, you can use the full recording capacity of the disc for recording. Therefore, the compression ratio of the image data or audio data of the recorded program is calculated from the recordable capacity of the recording medium 4, and one program is recorded at a bit rate (low compression rate) as high as possible.

In the above-mentioned image and sound recording device, the recording medium 4
If you configure a hard disk that can be rewritten many times but cannot be removed, not only in TS format,
PS format stream data may be recorded. In some cases, the PS format stream data is once recorded in a hard disk, and is transmitted to another writing device via the communication function so that the partner device writes the PS format stream data. . Even in such a case, the recording medium need not be removable. Therefore, when the recording medium operates not only by itself but also by another device through the communication function, the recording medium can be configured as a fixed type such as a hard disk, and can be stored in a collective management that is difficult to be tampered with.

In the video / audio recording apparatus described above, the recording medium 4
DVD-RA that can be rewritable and removable
If it is configured by an optical disk such as M or a semiconductor card, it receives digital TV broadcast, converts the first stream data in TS format into a data stream in second PS format, and attaches / detaches the converted second stream data. A removable recording medium 4 is a DVD-RAM for recording on a removable recording medium.
If such media are recorded according to the DVD video recording standard, it can be reproduced by a device capable of reproducing a DVD video recording standard disc such as another DVD video recorder.

In the video / audio recording apparatus described above, the recording medium 4
A function of writing the second stream data re-recorded in the program stream to a removable recording medium connected to the recording medium input / output unit 3 may be added. Once T
The first stream data of S format is converted and the second stream data of PS format is recorded on the same first recording medium 4. If the second recording medium 5 which is removable can be connected and written out after performing an editing operation from the second stream data of the PS format and cutting unnecessary portions, it is a storage or other device. The stream data to be reproduced by the first recording medium 4 is put in the second recording medium 5, and only the data that is used for editing or data that is erased once viewed is recorded in the first recording medium 4.
You can put it in. Therefore, the recording medium can be used properly according to the intended use.

The copyright processing procedure of the image / audio recording apparatus will be described with reference to the flowchart of FIG. After receiving the data in the TS format, TS separation for extracting predetermined program data is performed (S1). Next, the copyright information of the content data is checked (S2), and it is determined whether the copy recording can be performed many times, the copy recording can be performed only once, or the copy recording cannot be performed at all. Even if the data in TS format is impossible to duplicate and record,
Recording on the recording medium 4 is impossible (S7), and only AV output from the decoding unit 6 is permitted.

On the other hand, looking at the copyright information, if the copy recording is possible, the decoding unit 6 decodes while recording the TS format stream data on the recording medium 4 (S3).
Then, it is checked whether re-recording is possible in PS format (S4).
If it is possible to copy and record only once, as long as TS format data is left on the recording medium 4, PS format stream data cannot be recorded on the recording medium 4. In this case, a display for prohibiting recording in the PS format is displayed (S8),
Encoding operation in PS format is not performed. If it is possible to copy and record the copyright information as many times as possible, the PS format is encoded (S5). Then, PS format stream data is recorded on the recording medium 4 (S6).

Although not shown in this flow chart, when the copy information can be recorded only once in the copyright information judgment (S4), the stream data of the TS format is not left on the recording medium 4 and the stream of the PS format is recorded. It is possible to record only the data.

FIG. 10 shows a case where PS format encoding is performed by using the present video / audio recording apparatus to create stream data conforming to the DVD video standard and a case corresponding to stream data conforming to the DVD video recording standard. This will be described using a flow chart. Which standard is to be used for recording on the recording medium 4 is set in advance. First, as encoding condition settings, the compression degree of images and audio, the image reproduction method (NTSC or PAL
Or), the number of image pixels, the audio compression method (AC3, linear PCM, etc.), the number of audio channels (monaural or stereo, or dual monaural if compliant with the DVD video recording standard), etc. are set (S61). ). Then, stream data of image data and audio data is generated (S62). If it is the DVD video standard recording, it is judged whether it is the DVD video standard recording (S63).
K information is generated (S64), NV_PCK, V_PCK, and A_PCK that comply with the DVD video standard are generated (S65), and recorded on the recording medium 4.

In case of conforming to the DVD video recording standard, VOBI time map information is generated (S6
6), all time information etc. of each VOB is placed in a memory for temporary storage, V_PCK and A_PCK are generated and all are recorded in the recording medium 4, and then VOBI information is recorded in the recording medium 4 (S67). .

Further, the DVD video recording standard differs from the DVD video standard in various points. In particular, the audio signal format is different as described below.

In the DVD video standard, image signals and audio signals are recorded as a video stream and an audio stream, respectively. According to the DVD video standard, a multiplexing method (also called a multiplexing mode) of audio signals recorded in an audio stream is called an audio attribute of the audio stream. The audio attribute includes, for example, monaural (1 channel), stereo (2 channels), dual monaural (2 channels) such as bilingual broadcasting, and 5.1 channel surround (6 channels).

In the DVD video standard, the audio attribute of one audio stream is limited to one type within one program title. Therefore, according to the DVD video standard, the audio attribute should not be changed in the middle of one title. For example, switching from stereo to dual mono
Don't do it for the same audio stream.

According to the DVD video recording standard, D
Unlike the VD video standard, one audio stream may have a plurality of audio attributes in one title. This is because, in the data format defined by the DVD video recording standard, for example, information about when and how the audio signal multiplexing system changes in the audio stream (hereinafter referred to as audio signal multiplexing system information). Is recorded in real time (recorded as audio attribute information). As a result, D
According to the VD video recording standard, the multiplexing method of audio signals can be changed in real time in the middle of a title based on the multiplexing method information. Here, the audio signal multiplexing system is
For example, monaural (1 channel), stereo (2 channels), dual monaural dual monaural (2 channels), and 5.1 channel surround (6 channels) are included.

When recording an analog broadcast such as a terrestrial wave, an image and a sound may be converted from analog to digital and input to the encoding unit 8. The input digital interface to the encoding unit 8 may be shared with the system from the decoding unit 6.

First, the tuner receives radio waves of TV broadcasting through an antenna or a cable and converts them into intermediate frequency signals. Furthermore, TV broadcasting is generally audio multiplex broadcasting, and includes, for example, monaural, stereo, or bilingual broadcasting. An intermediate frequency signal is input from the tuner, and a multiplexed audio signal is detected from the intermediate frequency signal. The multiplex system (also called multiplex mode) is discriminated from the detected multiplex audio signals. Specifically, the control signal is detected from the multiplexed audio signal,
The multiplexing method is determined from the control signal. Here, the multiplexing system includes monaural, stereo, dual monaural dual monaural, multi-lingual with three or more channels, and multi-channel audio for stereophonic sound (front, surround,
And other sound effects, etc.), there is a system of special multi-channel sound such as karaoke sound.

Generally, the audio signals of a plurality of channels multiplexed in the multiplexed audio signal are respectively demodulated, and the audio signals of the respective channels are extracted as mutually independent extracted audio signals. Here, the types of extracted audio signals include monaural audio signals and left channels (Lch) in stereo broadcasting.
There are an audio signal and a light channel (Rch) audio signal, and a main audio signal and a sub audio signal in dual monaural broadcasting. Therefore, these extracted voices are analog /
Digital (AD) conversion and conversion to digital signal with linear PCM. As a result, the audio signal input to the encoding unit 8 is a digital signal in all channels.

Further, the number of voice channels can be increased by newly synthesizing not only the input voice but also the input voice. The synthesized voice signal (synthesized voice signal) is input to the encoder 8 together with the extracted voice signal. The synthesized voice signal includes, for example, a surround effect voice signal, a reverberation voice signal, a subwoofer voice signal, a center effect voice signal, and the like.

For the surround effect sound signal and the reverberation sound signal, the Lch sound signal and the Rch sound signal of the stereo sound are added or subtracted, delayed by a predetermined delay amount from the original stereo sound, and a predetermined gain is set. Can be synthesized.
In addition, the phase difference and the volume difference between the Lch audio signal and the Rch audio signal may be used for synthesis. When a stereo sound signal added with the surround effect sound signal or the reverberation sound signal is reproduced, if the delay amount and the gain are both large, the reproduced sound reverberates for a long time. Conversely, when the delay amount is small, the reverberation sound of the reproduced voice can be reduced. As a result, it is possible to give the reproduced sound a great sense of openness like an outdoor concert.

The subwoofer audio signal is obtained by passing a stereo audio signal or the like through a low-pass filter, separating and amplifying the low frequency components thereof, and making it an audio signal of a channel different from the original stereo audio signal. The subwoofer audio signal can be reproduced by a speaker having good reproduction characteristics for low frequency bands, separately from the original stereo audio signal.

As the center effect audio signal, a stereo audio signal or the like is passed through a bandpass filter to separate and amplify frequency components from about 100 Hertz to about several thousand Hertz.
This is an audio signal of a channel different from the original stereo audio signal. The center effect audio signal is, for example, an audio signal different from the background sound by separating the frequency component corresponding to the dialogue of the actor from the audio signal of a movie or TV drama. In that case, the actor's dialogue can be reproduced by a speaker different from the background sound.

All of the above synthetic audio signals are virtual multi-channel audio signals, and are actually synthesized from stereo audio signals having only two channels. In this way, the synthesized audio signal virtually synthesizes the audio signals of the predetermined number of channels from the audio signals of the predetermined number of channels. With these, a multi-channel audio signal is generated from a 2-channel audio signal, and the AC3.
If 1-channel encoding is performed, multi-channel reproduction can be realized at the time of reproduction on a DVD player or the like.

When a broadcast program is received, the stereo broadcast may change to a bilingual broadcast or a monaural broadcast while the program is being recorded. When recording in conformity with the DVD video standard, since the audio attribute in the middle of the program title cannot be changed, the main audio signal should be selected when the multiplexing method of the multiplexed audio signal is switched from stereo to dual monaural. , Set and respond in advance.

When recording of one title is started, if the multiplexing system of the multiplexed audio signal is determined to be stereo from the multiplexing system information, the Lch audio signal and the Rch audio signal are selected from the input audio signal. After that, when it is determined from the multiplex system information that the multiplex system has switched from stereo to dual monaural in the same title, Lc of the input audio signal
Select the h audio signal and the copy of the Lch audio signal. That is, a duplicate of the Lch audio signal is generated as a stereo Rch audio signal. Thus, the output audio signal can be substantially switched from the stereo audio signal to the dual monaural main audio signal while the multiplexing system of one title is set to stereo.

The same applies when the user sets the selection of the sub audio signal. That is, when it is determined from the multiplex system information that the multiplex system has switched from stereo to dual monaural within the same title, Rch of the input audio signal
The audio signal and the copy of the Rch audio signal are selected. In this way, the output audio signal can be substantially switched from the stereo audio signal to the dual monaural sub audio signal while the multiplexing system of one title is set to stereo. Further, even when the multiplexing system of the multiple audio signals is switched from stereo to monaural, the output audio signal can be substantially switched from stereo to monaural while the multiplexing system of one title is set to stereo.

On the other hand, in the case of recording in conformity with the DVD video recording standard, the number of audio channels can be changed on the way by broadcasting. Even if the multiplexing method of the multiplexed audio signal is switched from stereo to dual monaural, the number of encoded channels and audio attributes are changed to handle this, so there is no trouble as in conforming to the DVD video standard.

(Embodiment 2) Next, the configuration of the image and sound recording apparatus of this embodiment will be described.

The configuration of the image / audio recording apparatus of the second embodiment is the same as the configuration of the image / audio recording apparatus of the first embodiment described above, but the encoding unit 8 of the present embodiment includes the recording medium 4 The PS format data is generated based on the TS format data that has been recorded once.

Next, the operation of the image and sound recording apparatus according to the present embodiment will be described with reference mainly to FIG. 8 which is a flowchart showing the operation procedure of the image and sound recording apparatus according to the second embodiment of the present invention.

In the video / audio recording apparatus according to the second embodiment, the recording medium input / output unit 3 having an input / output function with the recording medium 4 is used.
And the first stream data of TS format supplied from the outside, and the recording medium input / output unit 3 to the recording medium 4
After recording the first stream data on the recording medium 4 and recording the first stream data on the recording medium 4, the recording medium input / output unit 3
A decoding unit 6 for reading and decoding the first stream data from the recording medium 4 via the recording medium 4 and an encoding unit 8 for encoding the decoded image and audio data to generate the second stream data in the PS format. When,
The second data stream encoded by the encoding unit is recorded on the recording medium 4.

[0119] TS format television broadcast data such as BS digital broadcasting is reproduced without damaging the received information, and after recording TS format stream data is completed, the time during which recording or reproduction is not performed by the present apparatus can be seen. Thus, it can be converted into a PS format that can be easily reproduced by a DVD player or the like. Therefore, it is possible to generate data that can be easily reproduced by a PS format DVD player or the like. If recording or reproduction is started, the conversion work currently being executed can be interrupted and then resumed, so that conversion can be performed at any time without spending a lot of time on conversion.

The copyright processing procedure of the video / audio recording apparatus of the second embodiment will be described with reference to the flowchart of FIG. After receiving the data in the TS format, TS separation for extracting predetermined program data is performed (S21). Next, the copyright information of the content data is checked (S22), and it is determined whether the copy recording is possible as many times as possible, the copy recording is possible only once, or the copy recording is not possible at all. If duplication recording is not possible at all, even TS format data cannot be recorded on the recording medium 4 (S29), and only AV output from the decoding unit 6 is permitted.

On the other hand, looking at the copyright information, if copy recording is possible, stream data of TS format is recorded on the recording medium 4 (S23). Then, it is checked whether re-recording is possible in PS format (S24). If it is possible to copy and record only once, as long as TS format data is left on the recording medium 4,
The PS format stream data cannot be recorded on the recording medium 4. In this case, a display for prohibiting recording in the PS format is displayed (S30), and the encoding operation in the PS format is not performed. If it is possible to copy and record the copyright information as many times as possible, the TS format stream data is reproduced and decoded (S26), and the PS format is encoded (S27). Then, the PS format stream data is recorded on the recording medium 4 (S28).

The PS format encoding is performed by using the present video / audio recording apparatus to create the stream data conforming to the DVD video standard and the case corresponding to the stream data conforming to the DVD video recording standard. The description is omitted because it is the same as the case of form 1.

(Third Embodiment) Next, the configuration of the image / audio recording apparatus of the present embodiment will be described.

The configuration of the video / audio recording apparatus of the third embodiment is similar to that of the video / audio recording apparatus of the first and second embodiments described above, but the encoding unit 8 of the present embodiment is a recording medium. 4, the PS format data is generated based on the TS format data once recorded on the recording medium 4, and the recording medium input / output unit 3 of the present embodiment records the generated PS format data on the recording medium 5.
Is directly recorded without recording on the recording medium 4.

The recording medium input / output unit 3 of the present embodiment
Corresponds to means including the first and second recording means of the present invention.

Next, the operation of the image and sound recording apparatus of the present embodiment will be described with reference mainly to FIG. 9 which is a flowchart showing the operation procedure of the image and sound recording apparatus according to the third embodiment of the present invention.

In the video / audio recording apparatus according to the third embodiment, the recording medium input / output unit 3 having an input / output function with respect to a plurality of recording media and the TS format first stream data supplied from the outside are received, The first stream data is recorded on the first recording medium 4 from the recording medium input / output unit 3, and the first stream data is recorded on the first recording medium 4 and the second format stream data is recorded on the second recording medium 5. When it is desired to convert to and record the first stream data from the first recording medium 4 via the recording medium input / output unit 3, a decoding unit 6 for decoding and decoding the decoded image and audio data. An encoding unit 8 that performs encoding to generate the second stream data of a format, and a second data stream encoded by the encoding unit is recorded on the second recording medium 5. It is.

TS format television broadcasting data such as BS digital broadcasting is reproduced without damaging the received information, and after recording is completed, PS format stream data is created.
The conversion is performed when it is desired to record on the second recording medium 5. Therefore, only the TS format stream data need be recorded in the first recording medium 4. This is effective when the recording capacity of the first recording medium 4 is limited and cannot be increased.

The copyright processing procedure of the video / audio recording apparatus of the third embodiment will be described with reference to the flowchart of FIG. After receiving the data in TS format, TS separation for extracting predetermined program data is performed (S41). Next, the copyright information of the content data is checked (S42), and it is determined whether the copy recording is possible as many times as possible, the copy recording is possible only once, or the copy recording is not possible at all. If duplication and recording is not possible at all, even TS format data cannot be recorded on the recording medium 4 (S48), and only AV output from the decoding unit 6 is permitted.

On the other hand, looking at the copyright information, if copy recording is possible, stream data of TS format is recorded on the recording medium 4 (S43). A removable recording medium 5 such as a DVD-R or a DVD-RAM is inserted, and the recording medium 5
When it is desired to record in PS format, it is checked whether re-recording in PS format is possible (S44). If it is possible to copy and record only once, as long as TS format data remains on the recording medium 4, PS format stream data cannot be recorded on the recording medium 5. In this case, a display for prohibiting recording in the PS format is displayed (S49), and the encoding operation in the PS format is not performed. If it is possible to copy and record the copyright information as many times as possible, the TS format stream data is reproduced and decoded (S45), and the PS format is encoded (S46). Then, the stream data in the PS format is recorded on the recording medium 4 (S47).

The PS audio encoding device is used to encode PS format to create stream data conforming to the DVD video standard, and a case corresponding to stream data conforming to the DVD video recording standard. The description is omitted because it is the same as the case of form 1.

Further, in the video / audio recording apparatus, the first recording medium 4 is composed of a hard disk that can be rewritten many times but cannot be removed, and the second recording medium 5 is
If it is composed of a removable optical disk such as a DVD-RAM or a semiconductor card that can be rewritten many times, or a removable optical disk or a semiconductor card such as a DVD-R that can be written only once, the first TS format Stream data of the hard disk or the like is recorded, and editing work is performed from the first stream data of TS format, and unnecessary portions are cut, and then the removable second recording medium 5 is connected. Then, if the configuration is such that the PS format stream data can be written while being converted, the PS format stream data can be written not only in a removable and rewritable recording medium such as a DVD-RAM or a DVD-RW but also in a once-writable DVD-R.
It is also applicable to a recording medium such as. If a recording medium that can be written only once is cheaper than a recording medium that can be rewritten many times, it has an effect that it can be used for storage using this recording medium.

In the above embodiment, the removable recording medium is DVD-RAM or DVD-R. However, the removable recording medium may be a magnetic recording medium, a magneto-optical recording medium (MO), which is removable from the recording device and the reproducing device.
It may be a semiconductor memory or a magnetic tape.

In the above, the first to third embodiments have been described in detail.

Based on the input first stream data, first recording means for recording the first stream data externally input as the transport stream format data on a predetermined first recording medium. Second stream data generating means for generating second stream data as program stream format data,
The present invention includes a data recording device including a second recording unit for recording the generated second stream data on the first recording medium.

Also, based on the recorded first stream data, there is provided a first recording means for recording the first stream data input from the outside as data in the transport stream format on a predetermined first recording medium. Second stream data generating means for generating second stream data as program stream format data,
The present invention includes a data recording device including a second recording unit for recording the generated second stream data on the first recording medium.

Based on the recorded first stream data, first recording means for recording the first stream data input from the outside as the data of the transport stream format on a predetermined first recording medium. Second stream data generating means for generating second stream data as program stream format data,
The present invention includes a data recording device including a second recording unit for recording the generated second stream data on a predetermined second recording medium.

The invention is a program for causing a computer to execute the functions of all or some of the means (or devices, elements, circuits, units, etc.) of the above-described program recording / reproducing apparatus of the present invention, It is a program that operates in cooperation with a computer. Of course, the computer of the present invention is not limited to pure hardware such as a CPU, but may include firmware, OS, and peripheral devices.

Further, the present invention is a program for causing a computer to execute all or some of the steps (or steps, operations, actions, etc.) of the program recording / playback method of the present invention described above. It is a program that works in cooperation with.

Note that some means (or devices, elements, circuits, sections, etc.) of the present invention, and some steps (or steps, operations, actions, etc.) of the present invention may be performed by a plurality of these means or It is meant to refer to some means or steps in a step, or to some functions or some operations in one means or step.

Further, some devices (or elements, circuits, units, etc.) of the present invention mean some devices of the plurality of devices, or some means of one device. (Or, an element, a circuit, a part, etc.) or a part of the functions of one means.

Further, a computer-readable recording medium in which the program of the present invention is recorded is also included in the present invention. Further, one usage form of the program of the present invention may be a mode in which the program is recorded in a computer-readable recording medium and operates in cooperation with the computer. Further, one usage form of the program of the present invention may be a mode in which the program is transmitted through a transmission medium, read by a computer, and operates in cooperation with the computer. The recording medium includes a ROM and the like, and the transmission medium includes a transmission medium such as the Internet and light, radio waves, sound waves and the like.

The structure of the present invention may be realized by software or hardware.

The invention is a medium carrying a program for causing a computer to execute all or some of the functions of all or part of the program recording / reproducing apparatus of the present invention described above, and is readable by the computer. The read program is a medium that cooperates with the computer to execute the functions.

Further, the present invention is a medium carrying a program for causing a computer to execute all or some of the steps of all or some of the steps of the program recording / playback method of the present invention described above, and is read by the computer. The readable and readable program is a medium that performs the operations in cooperation with the computer.

Therefore, according to the present invention, for example, TS format stream data is received and recorded on a recording medium while TS format stream data is decoded, and PS format stream data is decoded from the decoded image and audio data. It is possible to provide an audiovisual recording apparatus that records a data stream in which data is encoded on a recording medium. Such an image / audio recording device can output to an external device in the MPEG-TS format and can record in the MPEG-PS format, so that it can be reproduced by a DVD player or the like.
It is possible to directly generate a VD disc or the like.

When recording both the MPEG-TS format and the MPEG-PS format, for example, dubbing or data transfer to another device is executed at high speed without the user being aware of the conversion time of the data format. Can be done (because it is not necessary to perform the encoding operation at the same time).

When the recording medium is equipped with a recording medium that can be used as a temporary storage such as a hard disk and a removable recording medium such as a DVD, the hard disk must always be recorded in the MPEG-PS format. There is no need, and it can be configured to create detachable MPEG-PS format data when needed.

[0149]

As is apparent from the above description,
The present invention is applicable, for example, to the MPEG-TS format and the MPEG-
It has an advantage that it is possible to further reduce the user's burden due to mutual conversion with the PS format.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an image / audio recording device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a data structure of an MPEG-TS format.

FIG. 3 is a block diagram showing a configuration for performing audio conversion using the image / audio recording device according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a stream structure according to the DVD video standard.

FIG. 5 is a DS of NV_PCK in the DVD video standard.
Explanatory drawing showing structure of I packet

FIG. 6 is an explanatory diagram showing a stream structure in the DVD video recording standard.

FIG. 7 is a flowchart showing an operation procedure of the image / audio recording method according to the first embodiment of the invention.

FIG. 8 is a flowchart showing an operation procedure of an image / audio recording method according to a second embodiment of the present invention.

FIG. 9 is a flowchart showing an operation procedure of a video / audio recording method according to a third embodiment of the present invention.

FIG. 10 is a flowchart showing an operation procedure in the case of supporting the DVD video standard and the DVD video recording standard in the video / audio recording method according to the first embodiment of the invention.

[Explanation of symbols]

1 Input section 2 Separation section 3 Recording medium input / output unit 4 recording media 5 recording media 6 Decoding section 7 AV output section 8 Encoding section 9 Multiplex method information file 10 Voice signal synthesizer 11 Format converter

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04N 5/92 F term (reference) 5C053 FA25 GA11 GA14 GB01 GB38 JA03 JA05 KA04 LA06 5C059 KK41 MA00 RB02 RC32 SS02 SS13 SS20 SS30 UA02 UA05 5D044 AB05 AB07 BC01 BC04 CC04 DE43 DE44 DE50 EF05 GK08 GK10 GK12 HL08

Claims (27)

[Claims] 1. A first recording unit for recording first stream data input from the outside as data in a transport stream format on a predetermined first recording medium, and the input first stream data. Second stream data generating means for generating second stream data as program stream format data based on the second stream data, and second recording means for recording the generated second stream data in the first recording medium. And a data recording device. 2. A first recording device for recording first stream data input from the outside as transport stream format data on a predetermined first recording medium, and the first stream data recorded on the first recording medium. Second stream data generating means for generating second stream data as program stream format data based on the second stream data, and second recording means for recording the generated second stream data in the first recording medium. And a data recording device. 3. A first recording means for recording first stream data input from the outside as data in a transport stream format on a predetermined first recording medium, and the recorded first stream data. Second stream data generating means for generating second stream data as program stream format data based on the second stream data, and second recording for recording the generated second stream data in a predetermined second recording medium. And a data recording device having means. 4. The data recording device according to claim 1, wherein the generation of the second stream data is performed by using data before overlapping the on-screen display (OSD) data. 5. The first stream data is generated when the compression method of the first stream data is a compression method not defined by the DVD video standard or the DVD video recording standard. 4. The data recording device according to claim 1, wherein the data recording device is performed by once decoding and then encoding by a compression method defined by the DVD video standard or the DVD video recording standard. 6. The second stream data is generated when the first stream data is data sampled at a sampling frequency not defined by the DVD video standard, the DVD audio standard or the DVD video recording standard. After decoding the first stream data once, the DVD video standard, the D
4. The data recording device according to claim 1, wherein the data recording device is performed by performing a frequency conversion to a sampling frequency defined by a VD audio standard or the DVD video recording standard and then performing encoding. 7. The generation of the second stream data is performed when the first stream data has (1) a pixel number that is not defined by the DVD video standard or the DVD video recording standard, or (2) the DVD video. If the number of pixels is defined by the standard or the DVD video recording standard, but the number of pixels different from that of the first stream data is used for encoding,
4. The data according to any one of claims 1 to 3, which is performed by decoding the first stream data once and then converting the number of pixels to the number of pixels defined by the DVD video standard or the DVD video recording standard. Recording device. 8. The second stream data according to claim 1, wherein the second stream data is generated by using an encoding based on the DVD video standard, and is recorded by adding predetermined additional information defined by the DVD video standard. The data recording device according to any one of claims. 9. The method according to claim 1, wherein the second stream data is generated by using an encoding based on the DVD video recording standard, and is recorded by adding predetermined additional information defined by the DVD video recording standard. 3. The data recording device according to any one of 3. 10. The second stream data is a DVD.
4. The data recording device according to claim 1, wherein the data recording device is generated by using an encoding based on an audio standard, and is recorded by adding predetermined additional information defined by the DVD audio standard. 11. The generation of the second stream data comprises:
4. The encoding is performed using an encoding having a compression ratio calculated in consideration of the capacity of the second recording medium.
The data recording device according to any one of 1. 12. The data recording device according to claim 1, wherein the first recording medium is a hard disk that cannot be freely attached and detached and can be rewritten many times. 13. The data recording device according to claim 1, wherein the first recording medium is an optical disc or a semiconductor card that can be freely attached and detached and can be rewritten many times. 14. The first recording medium is a hard disk that cannot be freely attached / detached and can be rewritten many times, and the second recording medium is (1) freely attachable / detachable and 2) An optical disk or semiconductor card that can be rewritten many times or can be written only once.
The described data recording device. 15. The data recording apparatus according to claim 1, further comprising a third recording unit for recording the recorded second stream data on a predetermined second recording medium. 16. The first stream data has copyright information including information on copy recording, and the second stream data is (1) When copy recording is possible by seeing information on the copy recording. To the first
Record and decode stream data,
(2) The data recording apparatus according to claim 1, wherein the decoded first stream data is generated by being encoded and recorded on the first recording medium when the number of times of copying and recording is not limited. 17. The case where the first stream data has copyright information including information on copy recording, and the second stream data is (1) When copy recording is possible by seeing the information on copy recording. To the first
Stream data is recorded, the recorded first stream data is decoded, and (2) when the number of times of the above-mentioned copy recording is not limited, the decoded first stream data is encoded and generated, and The data recording apparatus according to claim 2, wherein the data is recorded on the first recording medium. 18. The case where the first stream data has copyright information including information on copy recording, and the second stream data is (1) copy recordable by seeing the information on copy recording. To the first
Stream data is recorded, the recorded first stream data is decoded, and (2) when the number of times of the above-mentioned copy recording is not limited, the decoded first stream data is encoded and generated, and The data recording device according to claim 3, wherein the data is recorded on the second recording medium. 19. A step of recording first stream data externally input as transport stream format data on a predetermined first recording medium, and a program stream format data based on the input first stream data. A data recording method comprising: a step of generating second stream data as data; and a step of recording the generated second stream data in the first recording medium. 20. A step of recording first stream data input from the outside as data of a transport stream format on a predetermined first recording medium, and a program stream format of based on the recorded first stream data. A data recording method comprising: a step of generating second stream data as data; and a step of recording the generated second stream data in the first recording medium. 21. A step of recording first stream data input from the outside as data of a transport stream format in a predetermined first recording medium, and a program stream format based on the recorded first stream data. A data recording method comprising: a step of generating second stream data as data; and a step of recording the generated second stream data on a predetermined second recording medium. 22. The data recording method according to claim 19,
Recording first stream data externally input as transport stream format data on a predetermined first recording medium; and a second stream as program stream format data based on the input first stream data. A program for causing a computer to execute all or part of the step of generating data and the step of recording the generated second stream data in the first recording medium. 23. The data recording method according to claim 20,
Recording first stream data input from the outside as transport stream format data on a predetermined first recording medium; and a second stream as program stream format data based on the recorded first stream data. A program for causing a computer to execute all or part of the step of generating data and the step of recording the generated second stream data in the first recording medium. 24. The data recording method according to claim 21,
Recording first stream data input from the outside as transport stream format data on a predetermined first recording medium; and a second stream as program stream format data based on the recorded first stream data. A program for causing a computer to execute all or part of the step of generating data and the step of recording the generated second stream data in a predetermined second recording medium. 25. The data recording method according to claim 19,
Recording first stream data externally input as transport stream format data on a predetermined first recording medium; and a second stream as program stream format data based on the input first stream data. A medium carrying a program for causing a computer to execute all or a part of the step of generating data and the step of recording the generated second stream data in the first recording medium, the method comprising: A processable medium. 26. The data recording method according to claim 20,
Recording first stream data input from the outside as transport stream format data on a predetermined first recording medium; and a second stream as program stream format data based on the recorded first stream data. A medium carrying a program for causing a computer to execute all or part of the step of generating data and the step of recording the generated second stream data in the first recording medium, A processable medium. 27. A data recording method according to claim 21,
Recording first stream data input from the outside as transport stream format data on a predetermined first recording medium; and a second stream as program stream format data based on the recorded first stream data. A medium carrying a program for causing a computer to execute all or part of the step of generating data and the step of recording the generated second stream data in a predetermined second recording medium, the computer comprising: Media that can be processed by.