JP2015180102A - Device for recording and reproducing digital data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for moving data from a first medium where digital broadcast limited by copyright is recorded, to a second medium at high speed.SOLUTION: A device includes: first recording means for recording digital data in a first medium with a first encoding system used in digital television broadcast; second recording means for converting the digital television broadcast into a second encoding system required for recording the broadcast in a second recording medium and recording it in the first medium; and means for transferring the data recorded by the second recording means to the second medium when the data is moved from the first recording medium to the second medium. When the digital television broadcast is limited by copyright, one of data recorded by the first encoding system and data recorded by the second encoding system can be viewed.

Description

The present invention relates to a video / audio recording / reproducing apparatus for recording and reproducing video / audio data on a recording medium.

MPEG video compression technology, in which video / audio data is digitized and compressed and encoded and recorded on a recording medium or transferred via a communication path, has come to be used in a wide variety of devices. For example, a DVD using MPEG-2 Video (ISO / IEC13818-2)
A recording / reproducing apparatus is a known consumer product. Also, with regard to television broadcasting, instead of the conventional analog broadcasting, MPEG-2 Video packet-multiplexed HD (
High Definition) digital broadcasting has begun. Recording devices that record this digital broadcast on a hard disk (HDD) or DVD have been commercialized.

Generally, these devices have a function of moving data recorded in the HDD to a DVD.
In the current digital broadcasting, MPEG-2 Systems (ISO / IEC13818-
Multiplexing by fixed-length packets called a transport stream (TS) in the (1 Systems) standard is performed, and when recording to the HDD, the TS-multiplexed data is recorded in the HDD. On the other hand, DVD-R, DVD-RW, DVD-RAM
DVD-VideoFormat and DVD Video R, which are standards for recording on DVD
In the encoding format, MPEG-2 is used as a basic multiplexing method.
It is obliged to comply with the PS format in Systems. HDD
When moving the data in the DVD to the DVD, it was necessary to convert from TS to PS. Also, in HD broadcasting, for example, the broadcast is broadcast at a high resolution of 1920 × vertical 1080, but for DVD recording, it has been necessary to convert to a conventionally used resolution of 704 × 480. Since these conversion processes require processing time, there is a problem that even if the access speed of the HDD and DVD is sufficiently high, the speed at which the data recorded on the HDD is moved to the DVD cannot be increased. As means for solving these problems, for example, in Patent Document 1, a TS stream having high resolution and a stream converted from TS to PS resolution conversion and multiplexing method are recorded on an HDD and recorded on a DVD. In this case, a technique for moving at high speed by recording PS data on a DVD is disclosed.

JP 2003-111023 A

However, in the above-mentioned Patent Document 1, when handling content that is restricted by copyright, it is not permitted to record TS and PS simultaneously on the video / audio recording / reproducing apparatus.
High-speed movement from D to DVD could not be performed.

The present invention provides a technique for moving data at high speed from a first medium on which a digital broadcast restricted by copyright is recorded to a second medium.

In the present invention, in order to solve the above-mentioned problem, a first recording means for recording digital data on a first medium by a first encoding method used in digital television broadcasting, A second recording means for converting to a second encoding method necessary for recording on the recording medium and recording on the first medium, and data recorded by the second recording means on the first recording medium Means for transferring to the second medium when moving from the recording medium to the second medium, and when the digital television broadcast is restricted by copyright, recording is performed using the first encoding method. One of the recorded data and the data recorded by the second encoding method can be viewed.

According to the present invention, it is possible to move from the first medium to the second medium at high speed even in digital broadcasting that is restricted by copyright.

1 is a schematic diagram of a first embodiment of a video / audio recording / reproducing apparatus system according to the present invention. FIG. 6A and 6B are diagrams for explaining recorded contents in an HDD according to the present invention.

  Hereinafter, the present invention will be described in detail with reference to examples.

FIG. 1 is a schematic diagram of a first embodiment of a video / audio recording / reproducing apparatus according to the present invention. In the present embodiment, a function of receiving an HD digital broadcast as an example of the present invention, recording it on an HDD serving as a first medium, and moving it to a DVD-RAM serving as a second medium will be described.

First, an operation when receiving an HD digital broadcast and recording it on the HDD will be described. An HD digital broadcast wave is input to the input terminal 10 from a ground wave antenna or a satellite parabona antenna (not shown). From this broadcast wave, the Tuner 11 selects the data of the desired channel by the user, demodulates it, and uses TS-Demu as a digital signal.
x12. TS-Demux 12 analyzes the input data as a TS multiplexed packet sequence, and extracts video data and audio data of a desired channel and management information necessary for channel viewing. The extracted video data and audio data are sent to the MPEG decoder 13, where the video data and the audio data are respectively decoded and output from the terminals 16 and 17 as a digital video signal and a digital audio signal, respectively. The output video signal and audio signal are output as video and audio on a display device (not shown), and the user can view the program.

On the other hand, when the selected program is recorded on the HDD, it is sent from the TS-Demux 12 to the Rec / Play Control 29 as a TS stream. Rec / Play C
In the control 29, desired video data and audio data are transferred to the TS at the time of recording.
The data is shaped as a file format that can be accessed on the HDD while keeping the data information. The file sent to the ATA-IF 21 is recorded in the HDD drive 22 via the ATA command.

Also, the video and audio decoded by the MPEG decoder 13 are recorded on the HDD drive through another data path. This path is described below. MPEG Dec
The digital video signal decoded and output by the order 13 is subjected to resolution conversion for each frame in an HD / SD Down Converter 18 that performs resolution conversion from high resolution to low resolution. The video signal and audio signal after resolution conversion are MP
In the EG Encoder 19, it is encoded again as a bit stream of MPEG2 Video and Audio. Each stream of Video and Audio is packetized and multiplexed as PS data in PS-Mux 20.
Further, the management information extracted from TS-Demux 12 is also packetized as PS data and output as data. These data are sent to the ATA-IF21,
It is recorded on the HDD in a time-sharing manner with the TS data described above. This PS data is later recorded on DVD-
When copying to the RAM, the data format is such that resolution conversion and multiplexing format conversion do not occur. Similarly, the management information is previously converted into a data format to be conformed when recording in the DVD-RAM. By treating TS data and PS data as files compliant with a format such as UDF (Universal Disc Format), both are simultaneously recorded and managed on the HDD as separate files. When the recording of the program ends, TS for the same program content
There will be a file containing data and a file containing PS data.

FIG. 2 shows an outline of file contents recorded in the HDD. With respect to the received program, the video data and audio data are stored in the TS format as the files for each program as 101, 102, 103, and the management information 100 stores the respective recording time, program information, and the like. On the other hand, PS data recorded for transfer to a DVD medium are 201, 202, 2
As shown in 03, each is stored so as to correspond to the original TS data, and the recorded contents are managed in 200 PS data management information. In this example,
Although TS and PS data are stored as separate files for each program, all programs may be processed as one file in each TS data and PS data as a separate structure. Conversely, one program may be divided into a plurality of files for processing.

Next, a case where data recorded on the HDD is moved to the DVD-RAM will be described. When moving program data recorded on the HDD to the DVD-RAM, first, Copy Cont.
rol23 reads the program data from HDD Drive22, and ATAPI-IF24
To the DVD-RAM via The data read at this time is PS data on the HDD. As described above, since it is recorded in advance in a format that should comply with the recording on the DVD-RAM, it can be copied to the DVD-RAM only by simple data transfer. Here, a case where the data reading speed from the HDD is about 264.4 Mbps and PS data compressed to about 6 Mbps is read is considered. 6Mbps
Reading at the normal speed is equivalent to reading by a normal viewer. If this is set to 1 × speed, the HDD has a read speed of 266.4 Mbps / 6 Mbps = 44 × speed. In the case of a RAM that can be written at about 22.16 Mbps, writing at 22.16 / 6 Mbps = 3.69 times speed is possible. Therefore, of the HDD read and DVD-RAM write speeds, the access speed is low.
3.69 from HDD to DVD-RAM with the throughput on the VD-RAM side as the limit value
Double speed movement is possible. At the time of this data transfer, resolution conversion, multiplexing method conversion from TS data to PS data, etc. are eliminated, so that high-speed movement up to the limit value of the data access speed can be performed. The HDD will have two TS and PS data redundantly, but when actually recording a program, it is necessary to receive a broadcast bit rate of about 1 × speed.
At the same time, in this configuration that performs conversion from TS to PS and resolution conversion, it is not necessary for the user to be aware of the time for conversion, and high-speed movement processing can be performed when necessary.

The operation when reproducing from the HDD and DVD-RAM will be described. In the HDD,
There are high-resolution TS recording and low-resolution PS recording. Usually, since the image quality is better with the high resolution, the Rec / Play Control 29 is set to HDD Dr.
Only the TS data is selected and read from the ive 22 and is supplied to the MPEG decoder 13 so that the recorded program is reproduced. Some digital broadcasts have a copy protection function restricted to protect the copyright of the content. For example, CPRM (Conte
In the default of copy protection called nt Protection for Recordable Media, content recorded on the HDD can be moved to other recording media only once.
The content that was originally in the HDD must be deleted. When recording a received program, it is prohibited to have two or more viewable stream copies in a medium such as an HDD or a DVD. Accordingly, the two streams TS and PS in the present embodiment should not be disclosed in a state where both are recorded on the HDD and can be viewed by the user. In order to comply with this restriction, the recording / playback controller in the present embodiment has a function of selecting and playing back either TS or PS content. For example, the user is provided with a selection screen using a GUI, and either a TS screen or a PS screen is selected for viewing. In addition, after recording, during normal times, priority is given to viewing a high-quality stream, and only TS can be played back. Alternatively, if the user chooses to move from HDD to DVD-RAM, then DV
Assuming that the user has confirmed his / her intention to view the image quality equivalent to the D-RAM, only the PS is selected and reproduced so that only the data recorded on the DVD-RAM can be reproduced. In addition, when editing the contents to be recorded from the HDD to the DVD in the form of a playlist editing screen, for example, only the PS image can be reproduced at the stage of starting editing. As a result, the content to be recorded on the DVD can be directly edited, and the PS data amount and the image of each frame can be disclosed to the user. The movement of the digital data is confirmed in the above manner, and H
When moving data from the DD to the DVD-RAM, the TS recorded stream is erased. In this way, it is possible to realize an apparatus in which TS / PS can be recorded at the same time, and high-speed copying can be performed later, while keeping restrictions on duplication prohibition even for contents on which duplication prohibition is imposed. The PS data recorded on the HDD and the PS data recorded on the DVD are both subjected to PS data packet demultiplexing by the PS-Demux 26 at the time of reproduction, and the MPEG decoder 27 decodes the SD data stream and audio. Output as data. For video, SD size data is HD
An up-conversion process is performed on the size in the SD / HD Up Converter 28. The video signal and the audio signal are respectively output to an external display via a Video Selector 14 (V-Sel in the figure) and an Audio Selector 15 (A-Sel in the figure).

In the present embodiment, the DVD-RAM has been described as the second recording medium, but it goes without saying that the same effect can be obtained even if the second medium is a DVD-R, DVD-RW, or the like. In addition, as a decoding path, a plurality of MPEG decoders are provided for TS and PS, but a common decoder may be used.

DESCRIPTION OF SYMBOLS 10 ... Input terminal, 11 ... Tuner12 ... TS-Demux13 ... MPEG Decoder14 ... Video Selector15 ... Audio Selector16 ... Video output terminal 17 ... Audio output terminal 18 ... HD / SD Down Converter19 ... MPEG Encoder20 ... PSADiV22 ... ATADIF22 ... 23 Copy Control24 ... ATAPI IF25 ... DVD-RAM Drive26 ... PS-Demux27 ... MPEG Decoder28 ... SD / HD Up Converter29 ... Rec / Play Control

The present invention relates to a digital data recording / reproducing apparatus for recording and reproducing video / audio data on a recording medium.

To solve the above problems, first means of the present invention, a hard disk drive, and the digital data recording and reproducing apparatus external medium is detachably attached, the first encoded digital data of a digital television broadcast the first recording unit and said second of said hard disk drive is converted into a second data coding scheme of the first data corresponding to the external medium to be recorded on the hard disk drive as a first data type comprising a second recording unit for recording, and wherein the transfer unit and the second data to transfer to the external media from the hard disk drive of the second coding scheme, and a controller to said controller, said If replication of the digital data is restricted, the first data and the to the hard disk drive When both the second data is recorded, characterized by the said reproducible so that it can view only the outside of the display first data.

It is a schematic diagram of a first embodiment of engaging into digital data recording and reproducing apparatus Ru audiovisual recording equipment of the present invention. Is a diagram for describing the recorded contents of the engaging Ru in the HDD video and audio recording and reproducing apparatus shown in FIG.

FIG. 1 is a schematic diagram of a first embodiment of a video / audio recording / reproducing apparatus according to the digital data recording / reproducing apparatus of the present invention. In the present embodiment, a function of receiving an HD digital broadcast as an example of the present invention, recording it on an HDD serving as a first medium, and moving it to a DVD-RAM serving as a second medium will be described.

The operation when reproducing from the HDD and DVD-RAM will be described. In the HDD, there are high-resolution TS recording and low-resolution PS recording. In general, since the image quality is better at the high resolution, the recorded program is reproduced when the Rec / Play Control 29 selects and reads only the TS data from the HDD Drive 22 and supplies it to the MPEG Decoder 13 during reproduction from the HDD. Some digital broadcasts have a copy protection function restricted to protect the copyright of the content. For example, in the default of copy protection called CPRM (Content Protection for Recordable Media) , content recorded on the HDD can be moved to another recording medium only once, and at the time of movement, it was originally in the HDD . Content needs to be deleted. Further, when recording the received program, HDD, it has been prohibited from having the replication of two or more viewable streams in the media, such as DVD. Accordingly, the two streams TS and PS in the present embodiment should not be disclosed in a state where both are recorded on the HDD and can be viewed by the user. In order to comply with this restriction, the recording / playback controller in the present embodiment has a function of selecting and playing back either TS or PS content. For example, the selection screen is provided to the user through the GUI , and either the TS screen or the PS screen is selected for viewing. In addition, after recording, during normal times, priority is given to viewing a high-quality stream, and only TS can be played back. Alternatively, if you select the user to move from HDD to DVD-RAM is, then the image quality of the DVD-RAM equivalent assumes that the user has confirmed the intention to watch, only the data to be recorded to DVD-R AM playback Select and play only PS so that it is possible. In addition, when editing the contents to be recorded from the HDD to the DVD in the form of a playlist editing screen, for example, only the PS image can be reproduced at the stage of starting editing. As a result, the content to be recorded on the DVD can be directly edited, and the PS data amount and the image of each frame can be disclosed to the user. The movement of the digital data is confirmed in the above manner, and when the data is moved from the HDD to the DVD-RAM, the TS recorded stream is deleted. In this way, it is possible to realize an apparatus in which TS / PS can be recorded at the same time, and high-speed copying can be performed later, while keeping restrictions on duplication prohibition even for contents on which duplication prohibition is imposed. The PS data recorded on the HDD and the PS data recorded on the DVD are both subjected to PS data packet demultiplexing by the PS-Demux 26 at the time of reproduction, and the MPEG decoder 27 decodes the SD data stream and audio. Output as data. Regarding the video, the SD size data is upconverted to the HD size in the SD / HD Up Converter 28. The video signal and the audio signal are respectively output to an external display via a Video Selector 14 (V-Sel in the figure) and an Audio Selector 15 (A-Sel in the figure).

In the present embodiment, the DVD-RAM has been described as the second recording medium, but it goes without saying that the same effect can be obtained even if the second medium is a DVD-R , a DVD-RW, or the like. In addition, as a decoding path, a plurality of MPEG decoders are provided for TS and PS, but a common decoder may be used.

Claims (7)

A first recording means for recording digital data on a first medium by a first encoding method used in digital television broadcasting;
A second recording means for converting the digital television broadcast into a second encoding method necessary for recording on a second recording medium and recording the second recording on the first medium;
Means for transferring data recorded by the second recording means to the second medium when moving the data from the first recording medium to the second medium;
When the digital television broadcast is restricted by copyright, the video / audio recording / reproduction that enables viewing one of the data recorded by the first encoding method and the data recorded by the second encoding method apparatus.   2. The video / audio recording / reproducing apparatus according to claim 1, wherein when data recorded on the first medium is reproduced, the data of the first encoding method and the second encoding method is high. A video / audio recording / reproducing apparatus that enables selection and viewing of encoding method data having a resolution video.   2. The video / audio recording / reproducing apparatus according to claim 1, wherein when data is moved from the first medium to the second medium, the data recorded by the first recording means is deleted. apparatus.   2. The video / audio recording / reproducing apparatus according to claim 1, wherein when the data is moved from the first medium to the second medium, the data recorded by the second recording means can be viewed. Playback device.   5. The video / audio recording / reproducing apparatus according to claim 3 or 4, wherein the user edits the content to be moved to the second medium when the user selects to move the data from the first medium to the second medium. A video / audio recording / reproducing apparatus having a function to be determined at the start.   2. The video / audio recording / reproducing apparatus according to claim 1, wherein the first multiplexing scheme is a transport stream described in ISO / IEC13818-1, and the second multiplexing scheme is defined in ISO / IEC13818-1. A video / audio recording / reproducing apparatus according to the program stream described above. When digital data is input,
Digital data is recorded on the first recording medium by the first encoding method and the second encoding method,
When the digital data is restricted by copyright, the video / audio recording / playback enables one of the data recorded by the first encoding method and the data recorded by the second encoding method to be viewed. Method.