CN1232954C - Optical disk recording/reproducing apparatus and method thereof - Google Patents

Abstract

An apparatus and method for recording and reproducing audio and video data on a rewritable optical disk in real time, is provided. A disk recording medium, allowing a user to access recorded data at predetermined intervals, includes cells comprised of part of predetermined data and set as reproduction and recording units, and information on position from the start of the cells to a specific position. This method includes the step of constituting a cell of part of the recorded audio and video data, constituting a program of the one or more cells, constituting a part of title (PTT) of a specific portion of the recorded audio and video data, and then recording the information on the cell, the program, and the PTT on the disk.

Description

Optical data recording/reproducing device and method thereof

Technical field

The present invention relates to optical data recording/reproducing device and method thereof, more specifically, relate to and in real time the Voice ﹠ Video data to be recorded in CD or the apparatus and method of reproducing from CD.

Background technology

Typical digital video disk (DVD) ROM (read-only memory) (ROM) video machines optical disc replay Voice ﹠ Video data.

DVD ROM video format comprises program chain (PGC) as shown in Figure 1, and program, and the cell that is used for the logical process data, and video object (VOBS) wherein record the Voice ﹠ Video data.

If film is recorded on the first and the end volume (VOLUME), then whole film is represented by PGC, and first and second volumes can be represented with program respectively.Equally, consider random-access needs, each program can be divided into several subsections and cell, and is included in the subregion that data in each cell are present in VOBS.

The manufacturer that makes data with DVD ROM video format, the original Voice ﹠ Video data item that constitutes with the PGC form, i.e. program and cell, and provide the result to the user.

As shown in Figure 1, program chain information (PGCI) is the link information of several programs, and VOBS is video object (VOB) set, wherein records the Voice ﹠ Video data item of actual compression.In a PGCI, one or more programs are arranged, and program comprises the set of one or more cell units.Each cell is a kind of recoding/reproduction unit, and the Voice ﹠ Video data are present in VOBS.PGCI only has the position of programme information such as Voice ﹠ Video data or is present in recoding/reproduction time among the VOBS.VOB among the VOBS is divided into video object unit (VOBU) again, is used for the random access unit as the dish data recording/reproducing device.Generally speaking, VOBU is made of compound video data and the voice data that deposits dynamic image expert group (MPEG) form of sector unit in.

To describe title in the DVD-ROM video and the relation between the PGC now in detail.For example, title can corresponding whole film, and from user's viewpoint, it is the maximum unit of data structure.According to the wish of manufacturer, when DVD-ROM video disc manufacturer that manufacturing has this title constructs a data structure, can make a PGC comprise a title, shown in Fig. 2 A, perhaps several PGC comprise a title, shown in Fig. 2 B.When the title that constitutes when mode as shown in Figure 2 reproduced in order, PGC#1 and PGC#2 were reproduced, and PGC#3 is selected and reproduce one of among PGC#4 and the PGC#5, and final PGC#6 is reproduced.Here, PGC#3, PGC#4 is to have different contents with PGC#5, perhaps can have the different editions of identical content.

From user's viewpoint, title is such major concept: it can be divided into several chapters and sections or title division or chapters and sections (PTT) to allow jumping to next scene rapidly from a scene.Under the situation of music CD, be recorded in whole songs on the CD corresponding to a title, and every first song is corresponding to chapters and sections or PTT.Program and cell are reproduction and the record units that is determined according to data character by the user.In the PGC corresponding to the title notion, PTT divides and logically offers the user by data content.

In information area, also has a PTT search pointer table information about title.

As shown in Figure 3, the PTT search pointer table comprises PTT search pointer table information area, and the PTT search pointer is present in the title.Herein, PTT search pointer table information area has the information about PTT pointer number.Each PTT search pointer indicates the time point that a PTT begins, and comprises program chain number (PGCN) and number of programs (PGN).Herein, PGCN represents the program chain number (PGC) of PTT subordinate, and PGN represents the number of programs among the PGC.When the user received next PTT instruction by external input device, a large amount of PTT information were moved to next PTT from the reproduced position of current PTT information, and PTT information is reproduced then.

In the DVD-ROM video format, the program that constitutes PGC as shown in Figure 1 is consistent to the content on the dish with physical record.That is to say that by one specific for the manufacture process that is recorded in the content on the dish, program is formed in the middle of the zone in the particular range, and a specific program can be defined from several programs selected and as PTT.Equally, program unit is divided according to the content of recorded data, so that PTT information can be utilized program unit.Yet, at the device that is used for real time record/reproduction Voice ﹠ Video data, such as program, cell, the unit of grade can not constitute according to the content that is recorded in the data on the dish, unless provided in real time about the customizing messages of record data content.Thereby if PTT constitutes according to prior art, then PTT information is meaningless to the user.

Summary of the invention

For addressing the above problem, an object of the present invention is to provide a kind of video disc recording and reproducting method that writes down and reproduce title division (PTT) information according to the real-time recorded data content on the rewritable disk.

Another object of the present invention provides a kind of video disc recording and transcriber, is used for writing down and reproducing on CD-RW title division (PTT) information of the data content that depends on real time record.

A further object of the present invention provides a kind of optical disc recording medium, whereby the user can be in specific unit such as cell or program random access title division (PTT) so that on rewritable disk, reproduce and record.

Correspondingly, for reach first purpose provide a kind of on rewritable disk the compact disk recording method of real time record Voice ﹠ Video data, said method comprising the steps of: specific region record audio and video data on dish; Form a cell with the Voice ﹠ Video data that partly are recorded, form a program with one or more cells, form a title division (PTT) that has a specific part of the Voice ﹠ Video data that are recorded, and the information on the disc recording cell then, program, and PTT.

For realizing first purpose, a kind of optical disc replay method is provided, can reproduce before the specific unit on the rewritable disk in real time and unit thereafter, said method comprising the steps of: before being used to reproduce a specific unit and the key of other unit thereafter when being transfused to, read with decode operation before, the video object unit (VOBU) that reads earlier and decode and comprise the specific unit that is used to reproduce; And when in above-mentioned steps, decoding,, on screen, show described decoded data when decoded data arrives when reproducing ad-hoc location in the specific unit.

For realizing second purpose, provide an optical recording/reproducing apparatus with the Voice ﹠ Video data on record and the reproduction rewritable disk, described device comprises: key input unit is used to import and reproduces before the specific unit and the instruction of data thereafter; Controller, be used for comprising the cell of part Voice ﹠ Video data at disc recording relevant, one comprises the program of one or more cells, and the title division (PTT) that comprises the specific part of Voice ﹠ Video data, before reading and decoding other unit, read and the information of the video object unit of decoding (VOBU), comprise a specific region that is used to reproduce in this unit; And when decoding, when decoded data arrives the ad-hoc location that is used to reproduce in the specific unit, on screen, show described decoded data.

For realizing the 3rd purpose, a kind of disk record medium is provided, its interval access recorded data to be scheduled to, comprising: comprise the part tentation data and be set at the cell that reproduces and write down unit; And the information on being positioned at from the cell starting position to an ad-hoc location.

The present invention also provides a kind of optical data recording/reproducing device that is used to write down and reproduce the Voice ﹠ Video data on the rewritable disk, and described device comprises:

Constitute and be set to the cell of the predetermined unit that reproduces and write down by the predetermined data of part; And

One key input unit is used for receiving instruction key to be recorded in ad-hoc location as division header (PTT) when record audio and video data; And

One controller is used in reproduction, when being in instruction key from the time point of key input unit input,, and the PTT information that reproduction is finished is recorded on the dish to certain location in independent area stores PTT information;

Wherein be included on the predetermined unit employed information when reproducing described position, and the information of described unit bias internal position in the information on the ad-hoc location.

Description of drawings

The detailed description that its preferred embodiment is done in conjunction with the drawings, it is more obvious that above-mentioned purpose of the present invention and advantage will become, wherein:

Fig. 1 is a block diagram, is illustrated among the video DVD-ROM program chain (PGC), program, cell, and the relation between the video object (VOBS);

Fig. 2 A and 2B are block diagrams, are illustrated among the video DVD-ROM relation between title and the PGC;

Fig. 3 is the detail drawing of title division (PTT) search pointer table;

Fig. 4 is the detail drawing of PTT search pointer;

Fig. 5 is the block diagram that is used to provide the optical data recording/reproducing device of PTT information according to of the present invention;

Fig. 6 is the detail drawing according to PTT search pointer of the present invention;

Fig. 7 is a process flow diagram, and the compact disk recording method that is used to write down PTT information according to of the present invention is described;

Fig. 8 is a process flow diagram, and the optical disc replay method that is used to search for PTT information according to of the present invention is described;

Fig. 9 is a process flow diagram, and the compact disk recording method that is used to write down the PTT position is described.

Embodiment

To be described respectively the logging mode and the reproduction mode of optical data recording/reproducing device shown in Figure 5 below.

In logging mode, audio/video (AV) codec 502 is according to predetermined compressing and coding system compression and the external audio that is arranged in scheduled unit and the video data of encoding and being imported, provide simultaneously such as the Voice ﹠ Video of the coding of scheduled unit again size with predetermined unit, or the information of reproducing such as time.The additional data that digital signal processor (DSP) 504 adds as error correction code (ECC) joins by in AV codec 502 coded datas, modulation related data, and output result.

Radio frequency amplifier 506 amplifies from the data of DSP504 input, and the data-switching of amplifying is become light signal.Pickup unit 508 comprises actuator, and the output signal of radio frequency amplifier 506 is recorded on the dish 509.Servo unit 510 receives the required information of servocontrol by RF amplifier 506 and system controller 512 from DSP504, and servo function is stablized in 508 execution to pick-up.System controller 512 control total systems, recorded data produces the logical message such as program or cell relatively, and receive the start position information of the desirable PTT of users by key input unit 514, or use any means to produce PTT information, and pass through DSP504, RF amplifier 506, and pickup unit 508 controls receive or produce the PTT information that will record on the dish 509.

Simultaneously, under reproduction mode, pickup unit 508 reads data that are stored on the dish 509 and the data that read with the output of light signal form in reproduction mode.Radio frequency amplifier 506 will convert electric signal to by the light signal of pickup unit 508 outputs, extract modulating data, and produce servosignal to carry out stable servo function with electrical signal form.The DSP504 demodulation is removed additional data and is come correction error by carrying out ECC simultaneously by the data of RF amplifier 506 modulation.The servosignal that servo unit 510 uses RF amplifier 506 to produce is carried out and is stablized servo function.502 decodings of AV codec are by the Voice ﹠ Video data of DSP504 compression and coding.System controller 512 is according to the instruction control pickup unit 508 of user by key input unit 514 inputs, RF amplifier 506, DSP504, and AV controller 502.Particularly, when input " PTT thereafter/before " order, corresponding to input instruction, system controller 512 control pickup units 508, RF amplifier 506, DSP504, and AV controller 502 is to reproduce PTT.

Fig. 6 is the detail drawing according to PTT search pointer of the present invention.The PTT search pointer is represented by search pointer information as shown in Figure 3.The PTT search pointer comprises the C_N of the cell represented in the program chain (PGC) number, and the OFFSET_TM that has from the starting position of cell the recovery time information of the ad-hoc location that indicates to PTT.Here, recovery time information based on video data with hour/minute/performance of second frame form.Like this, PTT one can specify a structure that belongs to the specific region in the cell of PGC.This is because cell and the structure of program are inconsistent with the content of recorded data in a general optical data recording/reproducing device, and because the structure of cell is possible oversize in some cases.

Correspondingly, when PTT is reproduced, described PTT specific unit as the employed cell of data structure that is used for reproducing and writes down and program in by access randomly.

Now with reference to Fig. 7 the method that writes down PTT information under the control of system controller shown in Figure 5 512 on CD is described.

In step 710, allocate out a physical region that is not occupied on the CD of data in advance recording by data.

In step 720, the external audio of input and video data are recorded in the video object unit (VOBU) that constitutes video object (VOB).

In step 730, such as the size of each VOBU that is recorded and the time that is used for reproducing VOBU be stored in the specific memory device.

In step 740, determine whether record is finished.

After all records were finished, in step 750, cell was formed by the Voice ﹠ Video data of part utilization such as information such as size that is stored in the VOBU in the specific memory device and recovery times.In step 760, program generates with one or more cells, and in step 770, a PTT generates with the specific part of Voice ﹠ Video data.

As a result of, described cell, program, and PTT information is recorded on the dish in step 780.

Program, cell and PTT information can constitute by receiving respectively from the user, but normally in disc recording apparatus they be at random constitute to make things convenient for the user and to save time.Cell can form in all cases.For example, cell can comprise recording start command and the END instruction by key input unit 514 inputs of Fig. 5 by the user.Program can also constitute in all cases.For example, program can comprise the cell that writes down in same date.PTT information comprises the content of Fig. 3 and 6, and considers and reproduce the required time of cell of configuration, can constitute at interval with the predetermined recovery time.

In the optical disc replay operation, will will described with reference to Fig. 8 below by the PTT search procedure that the system controller 512 of Fig. 5 is carried out.

At first, in step 810, system controller 512 reads PGC information so that receive user instruction and reproduce operation from user interface since a storer (not shown).In step 820, CD uses PGC information to reproduce operation.

In step 830, when the user imports " PTT thereafter/before " instruction key in the optical disc replay process, effectively the existence of PTT information will be checked in step 840.This is because last or first PTT in current PGC when reproduced, corresponding to thereafter/and the PTT information of PTT instruction before can't handle.

If there is effective PTT, PTT positional information thereafter/before as shown in Figure 6 is read in step 850.In step 860, one corresponding to thereafter/VOBU of PTT before, its least unit for record is at first read and is decoded.

Here, position common and VOBU, the position of PTT is inconsistent thereafter/before.Correspondingly, when the position of VOBU became a desirable accurately PTT position, decoded data was displayed on the screen in step 870.In step 880, reproduce operation and continue.

With reference to Fig. 9, the PTT location records method of system controller among Fig. 5 512 is described below.

At first, when the user began to reproduce operation by user interface, in step 910, system controller 512 read PGC information from a storer (not shown).In step 920, use PGC information CD carried out reproduce thereafter.

In step 930, in reproducing operation, when the user imports record PTT key, the position of current reproduction is understood that the cell number among the PGC when key is put input time, and in step 940, skew recovery time information in the cell as shown in Figure 6 is called PGC information, and is stored in (not shown) in the different storeies.In step 950, continue to reproduce operation.After reproduction was finished, in step 960, the PTT information of storage was recorded on the CD.

According to the present invention, by providing and the corresponding to PTT information of recorded data content, the Voice ﹠ Video data can be recorded on the CD-RW and from CD-R in real time to be reproduced, same, the user can be in specific unit one PTT of access randomly to reproduce and record.

Claims (13)

1. the compact disk recording method of real time record Voice ﹠ Video data on rewritable disk said method comprising the steps of:

Record audio and video data on a specific region of dish; And

Form a cell with a part of Voice ﹠ Video data that write down, form a program with one or more cells, form the title PTT that the specific part by the Voice ﹠ Video data that are recorded constitutes, and the cell on dish subsequently, program and PTT go up recorded information.

2. according to the disc recording method of claim 1, wherein, described cell constitutes based on start-of-record and the END instruction from the user.

3. according to the disc recording method of claim 1, wherein, described program constitutes based on the recording data information of cell.

4. according to the disc recording method of claim 1, wherein, described PTT is used to reproduce the time formation of described cell with recovery time interval reference clocklike.

5. according to the disc recording method of claim 4, wherein, be used for reproducing and the PTT of cell that the data structure that writes down is used or program by access randomly.

6. optical data recording/reproducing device that is used to write down and reproduce the Voice ﹠ Video data on the rewritable disk, described device comprises:

Constitute and be set to the cell of the predetermined unit that reproduces and write down by the predetermined data of part; And a key input unit, be used for when record audio and video data, receiving instruction key to be recorded in ad-hoc location as division header PTT; And

One controller is used in reproduction, when being in instruction key from the time point of key input unit input,, and the PTT information that reproduction is finished is recorded on the dish to certain location in independent area stores PTT information.

7. optical data recording/reproducing device as claimed in claim 6 wherein is included on the described predetermined unit in the information on the ad-hoc location, employed information when reproducing described position, and the information of described unit bias internal position.

8. optical data recording/reproducing device as claimed in claim 7, wherein said deviation post information be from described predetermined unit begin play a specific recovery time.

9. one kind is reproduced in real time before the above specific unit of rewritable disk and the optical disc replay method of unit thereafter, said method comprising the steps of:

Before being used to reproduce described predetermined unit and when the key of unit is transfused to thereafter, the VOBU of video object unit that comprises discrete cell that reads and decode is read and other unit before of the unit of decoding to reproduce; And

When in above step, carrying out decode operation, when described decoded data arrives the ad-hoc location that is used for being used to reproducing in specific unit, on screen, show decoded data.

10. record and reproduce the optical disc recording/reproducing method of Voice ﹠ Video data on rewritable disk said method comprising the steps of:

Constitute and be set to the cell of the predetermined unit that reproduces and write down by the predetermined data of part; And

When the Voice ﹠ Video data that write down are reproduced, set ad-hoc location; And

The information stores of the ad-hoc location that will set in above-mentioned steps is to independent zone, and reproduces described information simultaneously and in information that disc recording reproduced.

11. according to the optical disc recording/reproducing method of claim 10, wherein, the information on the described ad-hoc location comprises the information on the employed predetermined unit when reproducing in described position, and in the information of described unit bias internal position.

12. according to the optical disc recording/reproducing method of claim 11, wherein deviation post information is from described predetermined unit, promptly cell begins to locate the recovery time at a specific place.

13. an optical data recording/reproducing device that is used for writing down and reproducing the Voice ﹠ Video data on rewritable disk, described device comprises:

One key input unit is used to import and is used to reproduce before the predetermined unit and the instruction of data thereafter; And

One controller, be used for comprising the cell of part Voice ﹠ Video data at disc recording relevant, one comprises the program of one or more cells, and the information of title division PTT that comprises the specific part of Voice ﹠ Video data, before record and other unit of decoding, record and decoding comprise the VOBU of video object unit of the discrete cell that is used to reproduce, and in decoding when decoded data arrives the reproduction ad-hoc location be used at described predetermined unit, on screen, show described decoded data.

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