KR20040083233A - Apparatus for recording and reproducing data in video compound device - Google Patents

Abstract

PURPOSE: A device for recording/reproducing data in a composite video apparatus is provided to maintain compatibility between MPEG2 data streams having different formats, and to effectively perform various recording/reproducing operations between a video tape and an optical disk, thereby recording/reproducing various types of input signals. CONSTITUTION: The first video apparatus records an analog signal on a tape recording medium, or encodes a digital signal into an MPEG2 TS(Transport Stream), and records the encoded digital signal on the tape recording medium. The second video apparatus encodes a digital signal into an MPEG2 PS(Program Stream), and records the encoded digital signal on a disk recording medium. A composite video apparatus consists of a stream level converter(17). The stream level converter(17) level-converts the MPEG2 TS into a PS, or level-converts the MPEG2 PS into a TS.

Description

Apparatus for recording and reproducing data in video compound device}

The present invention relates to a data recording and device method in a composite video apparatus in which a D-VHS V-Cal and a disc recorder are integrally included.

In general, a VHS (Video Home System) method for recording and storing analog video and audio signals on a videotape is a digital VSR (VCR) for recording and storing digital video and audio data on a VHS videotape. D-VCR).

In addition, a video disc recorder (VDR) capable of recording and storing digital video and audio data on a high density optical disc such as a digital versatile disc (DVD) has been developed and commercialized.

On the other hand, in the D-VHS type digital VLC, digital video and audio data are encoded into a transport stream (TS) defined by the MPEG2 method and recorded and stored on a video tape.

In the disc recorder, digital video and audio data are encoded into a program stream (PS) defined by the MPEG2 scheme, and recorded and stored on a DVD.

Accordingly, a user records and stores a program of digital data desired by the user as a transport stream on a video tape using the D-VCR of the D-VHS method or by using the disc recorder. After recording and storing the program stream on an optical disc, high-definition video and high-quality audio can be played and watched. In recent years, a composite video apparatus in which the D-VHS-type digital VCD and a disc recorder are integrally formed is provided. It is expected to be developed and released and commercialized.

However, a specific solution has not yet been provided for maintaining compatibility between MPEG-2 data streams of different formats recorded by the digital VCD and the disc recorder included in the composite video device, and also the video. Efficient solutions for performing various functions and operations such as a connection recording operation or an analog signal recording operation between a tape and an optical disc have not yet been prepared, and therefore, there is an urgent need for providing a solution.

Accordingly, the present invention was created in view of the above-described circumstances, and it is possible to maintain compatibility between MPEG2 data streams of different formats in a composite video device in which a D-VHS VCD and a disc recorder are integrally included. In addition, the present invention provides a data recording and reproducing apparatus in a composite video apparatus for efficiently performing various recording and reproducing operations such as a connection recording operation and an analog signal recording operation between a video tape and an optical disc. will be.

1 schematically illustrates a configuration of a composite imaging apparatus according to the present invention,

2 shows a structure for a D-VHS video tape,

3 shows a structure of a rewritable optical disc,

4 to 7 show a detailed configuration of the data recording and reproducing apparatus in the composite video device according to the present invention.

※ Explanation of code for main part of drawing

10 tape mechanism 11 D-VHS recording / playback system

12 switch 13 disc mechanism

14: Disc recording / playback system 15: Microcomputer

16: memory 17: stream level converter

An apparatus for recording and reproducing data in a composite video apparatus according to the present invention for achieving the above object, records an analog signal on a tape recording medium, or encodes a digital signal into an MPEG2 transport stream to record on a tape recording medium. A first imaging device for performing; A second video device for encoding a digital signal into an MPEG2 program stream and recording the same on a disc recording medium; And a stream level converter for level converting the MPEG2 transport stream into a program stream or level converting the MPEG2 program stream into a transport stream.

Hereinafter, a preferred embodiment of a data recording and reproducing apparatus in a composite video apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 schematically shows a configuration of a composite video device according to the present invention, wherein the composite video device includes a tape mechanism 10, a D-VHS recording / reproducing system 11, a switching unit 12, The disc mechanism 13, the disc recording / reproducing system 14, the microcomputer 15, the memory 16, and the stream level converting unit 17 are constituted.

On the other hand, in the composite video device configured as described above, according to the user's selection, the analog TV signal of the external input is recorded as an analog signal on a VHS video tape, or A / D converted and encoded in the MPEG2 TS format. A digital data stream can be recorded on a D-VHS videotape, and can also be encoded in the MPEG2 PS format and recorded as a digital data stream on an optical disc such as a rewritable DVD (RW-RW).

In addition, in the composite video apparatus, an external input digital TV signal is encoded in MPEG2 TS format and recorded on a D-VHS videotape as a digital data stream or encoded in MPEG2 PS format according to a user's selection. To a digital data stream.

In the composite video apparatus, after reading the data stream of the MPEG2 PS format recorded on the optical disc, and converting the data stream of the MPEG2 TS format using the stream level converting unit 17, the D- After reading the data stream of the MPEG2 TS format recorded on the VHS video tape or recorded on the D-VHS video tape, and converting to the MPEG2 PS stream by using the stream converting unit 17, Can record

2 illustrates a structure of a D-VHS video tape. When an analog signal is recorded, audio is recorded on an upper side of a general VHS video tape, a control signal is recorded on a lower side, and a video is recorded on a middle portion. In the case of a D-VHS video tape that is recorded and digital data is recorded, as shown in FIG. 2, subcode data such as a program title, a time code, and the like are recorded in a partial region in the video track. First and third amble areas for protecting code data and main video data are separately allocated.

In addition, the D-VHS video tape or the VHS video tape can be recorded in the above-described format, and the system recording and playback clocks can be changed, and the main video data can be adjusted to enable recording. For example, for a D-VHS video tape, 14 MHz would be used for a VHS video tape if the system recording clock was used for 19 MHz.

In addition, in the case of the D-VHS video tape, not only HD class data streams but also SD class data streams can be recorded and can be recorded in LS2, LS3, LS5, and LS7 which are long recording modes according to the input stream rate. For example, if the LS7 mode is set based on a 120-minute recording capacity, 28 hours of recording is possible.

Therefore, when recording a program onto an optical disc using a disc recorder, when the recording capacity of the optical disc becomes insufficient, the recording operation of the D-VHS videotape is selected to an appropriate mode, and then the connected recording operation is automatically performed. In the HS mode of the HD class recording mode and the SD mode of the SD class recording mode, recording processing is performed in units of tracks. In the LS mode, it depends on how many times the recording is reproduced on the same track.

3 illustrates a structure of a rewritable DVD, wherein the rewritable DVD is divided into an R-Information area and an Information area, and the R-Information area includes a PCA (Power Calibration Area) and a PMA ( Recording Management Area), wherein the PCA is an area allocated to set the laser power to an optimal value when data is recorded, and the RMA records a recording signal mode, start / end time information, and the like.

The information area is divided into a lead-in area, a data area, and a lead-out area, and the lead-in area and the lead-out area are notified of the start and end points of data to be recorded, and the data area has a data stream. Are recorded.

4 illustrates a detailed configuration of a data recording and reproducing apparatus of the composite video apparatus according to the present invention. First, 200 denotes a signal flow and selection in a disc recording mode, an analog VHS recording mode, and a digital VHS recording mode, and 300 denotes a signal processing process for each reproduction.

On the other hand, each signal selection is selected in the microcomputer according to the user's key input, analog signal is also output from the digital TV, but the A / V signal output from the analog TV is to be first recorded in analog or digital If you record in analog, you choose in 206 whether you want to record on VHS tape or D-VHS tape, by the recognition hole of the tape. It may be selected automatically.

In the case of recording as an analog signal, the audio signal is recorded in the audio track of the tape, the video signal is recorded in the center part, and the control signal is recorded in the lower part of the tape. When recording is desired, the signal selected at 201 is selected again with the signal reproduced in the analog VHS at 202, where the recording of the reproduced signal in the analog VHS is copied from the analog VHS to the disc recorder, i.e., VDR.

On the other hand, the signal selected at 202 is reproduced at D-VHS at 203 and must be reselected with the signal passed through the stream level converting unit of 340, in this case, the case is copied from D-VHS to VDR, and input from 202 to 203. The signal being becomes an analog signal and the other is a digital signal.

In addition, in 210, when the reproduction signal of the D-VHS is not recorded, but the recording signal is recorded in the D-VHS, a data stream of MPEG2 TS format, that is, a signal of a TP (Transport Packet) level, is output in 205. In 210, the signal input at 203 is encoded and recorded on the optical disc.

On the other hand, the stream output from the digital TV and the VDR reproduction signal which has passed through the stream level converting unit of 340 are selected at 204. When the selected signal is recorded in the D-VHS, it is a case where it is copied from the VDR to the D-VHS.

If the D-VHS playback signal or the VDR playback signal supports both the TS and PS level signals, there is no need to go through the stream level converting unit. Otherwise, all input stream levels must be matched. The signal and the signal output at 210 are selected.

In addition, the signal selected at 205 is recorded by the 230 D-VHS recording processing unit, where it is determined whether to use a VHS tape or a D-VHS tape, which can be automatically selected by the recognition hole of the tape. The determination of the tape will depend on which system clock is to be used.

On the other hand, when the playback process is described in detail, if it is determined whether the D-VHS playback or the analog VHS playback at 301, the output via the 310 and 320 to the TV, respectively, and the VDR playback is output to the TV through the 330.

FIG. 5 illustrates an internal processing block for each processing unit of FIG. 4. The video and audio signals input to 211 and 212 of FIG. 5 are properly processed and then encoded to a disc by a disc recording system controller through an encoding process. After the D-VHS signal is recorded or the level is converted by the TS / PS converter of 341, the D-VHS signal is inputted to the encoder and subjected to the rest of the above process.

In addition, the A / V signal recorded as described above is transmitted to the decoder by the disc reproducing system controller at the time of reproduction and output to the TV through decoding process. Is input via a PS / TS conversion unit, or is input from a digital TV to be temporarily stored in a buffer, and the temporarily stored data is output to the recording channel interface of 233 through a 212 D-VHS format process.

On the other hand, after the various processes for protecting the input data is recorded via the recording amplifier, the recorded data is input to the reproduction channel interface of the 313 via the reproduction amplifier and equalizer during reproduction, the data is 314 It is temporarily stored in the buffer through the deformatter process and then outputted to the TV by the output TP processor.

400 is an information memory for storing the title and time information of a program. The program 400 stores program information (PGI) during VDR playback or information in a sub code area during D-VHS playback. When the VHS signal is recorded, the sub code information recorded in 400 is read out and recorded in the program information. On the contrary, when the VDR signal is recorded in the D-VHS, the information data is read out in 400 It is written together in the code area.

In addition, when recording other information, information can be received by a microcomputer or the like. FIG. 6 shows the internal structure of the encoder 214 of FIG. 5, which is a video encoder for processing MPEG2 picture encoding, Dolby Digital, and MPEG1. It consists of an audio encoder for Layer 2 audio and audio encoding, a memory interface for controlling memory, a microcomputer interface for receiving control signals from an external host, and an A / V controller for controlling the output of video and audio.

FIG. 7 illustrates the internal structure of the decoder 332 of FIG. 5, wherein the stream interface and parser 3321 accepts an input stream to analyze the stream, extract A / V, and extract time stamp information. The interface is controlled by the host and informs the status.The 3325 A / V interface provides control and interface to the memory required for decoding. The 3324 A / V decoder provides MPEG1, MPEG2 video decoding and MPEG1, MPEG2 Layer2. It handles AC3, Linear PCM, etc.

8 illustrates an internal structure of the 232 D-VHS formatter and the 314 deformatter of FIG. 5, wherein the 2321 in-stream interface and a smooth buffer control and outer ECC for input / output of the input stream and temporary storage of the stream are shown. And 2322, the inner ECC that controls it, and 2324, which controls it, a format conversion and subcode process that allows data to be processed according to the D-VHS format, and inserts information into the subcode region, interleaving and deinterleaving of the data. 2326 for processing the interface of processing and memory, 2328 for interfacing with the channel, and a microcomputer interface for exchanging information such as recording and playback modes from the host.

Or more, preferred embodiments of the present invention described above, for the purpose of illustration, those skilled in the art, within the technical spirit and the technical scope of the present invention disclosed in the appended claims below, to further improve various other embodiments Changes, substitutions or additions will be possible.

The data recording and reproducing apparatus of the composite video apparatus according to the present invention constructed and constructed as described above is compatible with MPEG2 data streams of different formats in a composite video apparatus in which a D-VHS VSR and a disc recorder are integrally included. In addition, it is possible to efficiently perform various recording and reproducing operations such as a connection recording operation and an analog signal recording operation between a video tape and an optical disc, and to convert an analog signal into an analog or digital signal, or to convert an MPEG2 TS Through various processes such as converting a stream into an MPEG2 PS stream, various types of input signals can be recorded and played back, and both HD, SD, and analog video can be recorded and played back. By performing linked recording between recording media, It is possible to record the data recorded on the optical disc and the data recorded on the D-VHS tape as it is, so that the deterioration of the data can be prevented and the necessary videos and information can be edited. It is a useful invention.

Claims (6)

A first imaging device for recording an analog signal on a tape recording medium or for encoding a digital signal into an MPEG2 transport stream to record on a tape recording medium; A second video device for encoding a digital signal into an MPEG2 program stream and recording the same on a disc recording medium; And And a stream level translator for level converting the MPEG2 transport stream into a program stream or level converting the MPEG2 program stream into a transport stream. The method of claim 1, The stream level converter converts the MPEG2 transport stream into a program stream when copying and recording data recorded on a tape recording medium of the first video device to a disk recording medium of the second video device. An apparatus for recording and reproducing data in a composite video apparatus. The method of claim 1, The stream level converter converts the MPEG2 program stream into a transport stream when copying and recording data recorded on the disc recording medium of the second video device to the tape recording medium of the first video device. An apparatus for recording and reproducing data in a composite video apparatus. The method of claim 1, And said first video device is a D-VHS VSI and said second video device is a disc recorder. The method of claim 1, And the first imager records an external input signal analog to a VHS tape or digitally records a D-VHS tape according to a user's selection. The method of claim 1, The first video apparatus, according to a user's selection, when the disk recording capacity of the second video apparatus is insufficient, continuously recording and recording an external input signal to a tape recording medium. Playback device.