JP2002074839A - Method and device for recording and reproducing digital signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry on a picture recording despite a disk full state for completing the recording of a program with no discontinuation by providing an HDD being a recording medium where a disk cannot be taken out for a recording and reproducing device when the program is recorded by a disk recorder-reproducer such as a DVD-RAM and also to consider a problem where a request may possibly be given from a user by performing the recording to the HDD. SOLUTION: A recording medium where an HDD, etc., cannot be taken out is built into a disk recorder-reproducer in addition to a recording medium such as a DVD-RAM which can be taken out. Thus, the recording is carried out to the HDD and a program can be completely recorded with no discontinuation even when the recordable area of the recording medium becomes lower than the set threshold during the recording of data and thereby the data cannot be recorded on the DVD-RAM. In a reproduction mode, the data recorded on the HDD can be seamlessly reproduced on the basis of the VOBU address information and without copying the data to a disk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus and method for recording on or reproducing from a medium such as an optical disk.

[0002]

[Prior Art] International standard method of moving picture compression (high efficiency coding)
International Standard MPEG2 (Moving Pictu)
BS (Broadcasting Satelli) using re Experts Group Phase 2
te) Digital broadcasting service has been started. Rice,
Terrestrial digital broadcasting has started in the UK, and terrestrial digital broadcasting is expected to start in Japan in the future. Television broadcasting has begun to change from analog to digital worldwide. It is anticipated that the recording devices will be digitized as well, following the digitization of television broadcasting. In fact, a recording device "DT-DR5000" capable of recording on a magnetic tape from Hitachi, and a DVD-RW (Digital Video Disc-
A recording apparatus “DVR-1000” capable of recording on a rewritable (disc) rewritable disc has also been released. With the advance of digitalization of television broadcasting, an analog VTR (Video Tape Re) widely used in ordinary households has been released.
It is expected that digital recorders will be widely used in place of recorders.

[0003] Among the digital recording devices, it is expected that an optical disk recording device having a special function utilizing a random access property and an excellent editing function will become mainstream, but the capacity of a current recordable optical disk medium is 2.6 GB per side. Even if recording was performed with 5.2 GB on both sides and image quality equivalent to the standard recording of the current VHS, about 1 hour on one side and about 2 hours on both sides
Time and short.

The pioneer recorder "DVR-100"
Although it is possible to extend the recording time by lowering the recording rate on the disc and lowering the image quality as in "0", there is still no difference from the recording time in the triple recording mode of the current analog VTR.

[0005]

[0005] Even if a 5.2G disc is used to record terrestrial analog broadcasting, which is currently the mainstream, it takes about 2 hours, and even if the image quality is reduced, it takes about 6 hours. No significant differences are seen. In addition, in the case of program recording reservation, in the current analog VTR, a method in which a user records a counterprogram while watching a program 1
There is a method 2 in which recording is performed in accordance with the user's reservation setting in the absence of the user, but there is no significant difference in the program reservation method even if the recording medium is changed to a disk.

In the above-mentioned method 2, if the user is absent even if the recordable area of the VTR tape is running short, it is impossible to replace the VTR tape. .

[0007] Also, in the method 1, since a free time of several seconds can be obtained by exchanging the VTR tape, there is a problem for a user who wants to continuously record a program on one tape or the like.

Therefore, according to the present invention, in addition to a removable recording medium such as a VTR tape or a DVD-RW, an HDD (Hard Disk Drive)
Incorporating a non-removable recording medium such as the one below, the data can be retrieved even if the recordable area of the recording medium falls below the set threshold during data recording and data cannot be recorded on the removable recording medium. It is an object of the present invention to solve the above-described problem by continuing recording on an unusable recording medium.
In addition, a problem that a request from a user is expected to occur by recording data on the HDD will be considered.

[0009]

According to the present invention, a disk recording / reproducing apparatus incorporates a non-removable recording medium such as an HDD in addition to a removable recording medium such as a DVD-RAM so that data can be recorded during data recording. Even if the recordable area of the medium falls below the set threshold and data cannot be recorded on the DVD-RAM, recording continues on the HDD, and it is possible to record until the end of the program without ending the program recording halfway. I do.

[0010]

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

FIG. 1 is a block diagram showing the configuration of a digital signal recording / reproducing apparatus according to a first embodiment of the present invention.
Referring to FIG. 1, reference numeral 101 denotes an antenna for receiving digital data of the MPEG system, reference numeral 102 denotes a receiver for receiving the data and signal processing, and reference numeral 103 denotes one of the standard television systems.
NTSC (National Televisi)
An antenna 103 that receives analog data of the on-system committee (104) method is a receiver that receives the data and performs signal processing. 105 is an input signal selection means for selecting the data after the signal processing,
Either one is selected and output.

The input MPEG2 system stream data is a VOBU (VideoOBjectUni).
It is composed of a basic unit called t), and recording on a recording medium is performed in VOBU units. Reference numeral 106 denotes a unit that detects VOBU information every time a VOBU that is a recording unit is encoded. Reference numeral 107 denotes a large-capacity recording / reproducing device represented by an HDD, and reference numeral 108 denotes a DVD-RAM drive or the like that performs recording and reproduction using a recording medium that can be taken out by a user. Reference numeral 109 denotes address information of data recorded on the disc, such as a skip of a recording area due to a defective portion of the disc or a jump due to recording to another free area, at the time of actual recording from a recording / reproducing means such as a DVD-RAM drive. It is a means to do. 110 is the VOB
Means for generating file system information necessary for reproduction from the U information 106 and the recording address information 109;
Is a means for detecting the remaining amount of the disk from a recording / reproducing means such as a DVD-RAM drive. Reference numeral 112 denotes a file system information generation unit 110 and a recording medium remaining amount detection unit 1
Recording / reproduction control means for performing recording / reproduction control on recording / reproduction means such as a DVD-RAM drive and recording / reproduction means such as an HDD based on the information output from 11, and 113 controls the recording / reproduction control means. It is a microcomputer.

FIG. 2 is a diagram showing an MPEG2 system stream and an address management method recorded on a recording medium. VOBU 201 includes main video information V_PCK 203, audio information A_PCK 204, and sub video information SP_PCK20.
5 GOPs (Gr.
V_PCK, A_P for (of Of Picture)
Owns CK and SP_PCK data. One or more V
The OBUs 201 form a VOB 202.

A data table of address information for each VOBU is a TMAP 210, which is included in M_VOBI 209, which is stream data information of Movie. Information of the TMAP 210 is collected by one or more P
It is managed by a Cell 208 constituting the log RAM 207.

The Program RAM 207 is a program unit that can be defined and recognized on the user side.
07 gathered together, the PGCI (ProgRAM Chai)
n Information) 206.

FIG. 3 shows that during recording of a program, a recordable area of a recording medium (DVD-RAM or the like) which can be removed by a user falls below a set threshold value, and recording on one removable recording medium becomes impossible. If the recording has been completed, the recording of data and address information is continued on a non-removable recording medium (HDD or the like), and the recording is not terminated in the middle of the program. A procedure for seamlessly reproducing a program recorded over a medium, or a removable recording medium and a non-removable recording medium, and a program recorded over two recording media and stored in a removable recording medium. This is the procedure that enables

In this embodiment, a case where data in accordance with the format shown in FIG. 2 is input will be described as an example. Next, a method of recording data on a removable recording medium will be described with reference to FIG.

The data received by the antennas 101 and 103 is input from the receivers 102 and 104 to the input signal selection means 105 in the form of an MPEG2 stream. A removable recording medium 111 (DVD-RAM in this embodiment)
When a disc is considered, the recording medium remaining amount detecting means 111 detects the remaining recordable amount and outputs it to the recording / reproducing control means 112.

As described with reference to FIG. 2, since the address management of the input data is performed for each VOBU, recording to the disk is performed in VOBU units. 108 (in this embodiment, a DVD-RAM drive). When recording data on a disc, information such as information skipped due to disc loss or information jumped to another address and recorded because existing data has already been written is D
It is output from the VD-RAM drive 108 to the recording address information detecting means 109.

Further, the VOBU information detecting means 106
PCK (V_PCK, A_PC) constituting the OBU
K, SP_PCK, etc.) and the number of PCKs including video information to be referred to first at the start of video, and output the detection results to the file system information generating means 110. V output from the VOBU information detecting means 106
Based on the OBU information and the recording address information output from the recording address information detecting means 109, file system information generating means 110 generates file system information,
The data is recorded on the DVD-RAM drive via the recording / reproduction control means 112. This file system information is required when reproducing recorded data.

During this processing, the recording medium remaining amount detecting means 11
1, when the remaining disk space is insufficient, the conventional analog V
As in the case of the TR machine, recording ends in the middle of the program, which is inconvenient for the user.

One of the objects of the present invention is that a recordable area of a recording medium falls below a set threshold during data recording, and
Even if data cannot be recorded on the D-RAM disk, the program can be recorded to the end.

Therefore, according to the present invention, in addition to a recording medium such as a DVD-RAM which can be taken out by a disk recording / reproducing apparatus, a recording medium which cannot be taken out such as an HDD is built in, so that the recording medium can be recorded during data recording. Even when the area falls below the set threshold value and the data cannot be recorded on the removable recording medium, the recording of the data and the address information on the non-removable recording medium is continued. Also, at the time of data reproduction, the data recorded on the removable recording medium and the data recorded on the non-removable recording medium should be reproduced seamlessly based on the address information recorded together with the data on the recording medium. Thus, the above-mentioned problem is solved. Also,
A problem caused by recording data on a non-removable HDD different from the inserted removable disk will also be considered.

Based on the above, a description for solving the problem will be further added with reference to FIGS. When a DVD-RAM disk is inserted, or after data is recorded in VOBU units, the disk space information recorded on the disk is read by the recording medium remaining amount detecting means 111 to check the disk remaining amount ( Process 301). According to the check result, whether to record the data on the disk or the HDD is selected (process 302). If the remaining amount of the disk is higher than the set threshold, that is, if recording on the disk is possible, it is recorded on the disk (process 303). If the program ends and the recording ends, the process ends. If the recording continues, the process returns to step 301 (step 30).
4). Here, the threshold value is a threshold value after securing an area for recording the file system information of the disk and an area for one or more VOBUs, and therefore, it is added that the file system information cannot be recorded.

Consider a case in which the remaining amount of the disk falls below the threshold during recording. In the present invention, a recording / reproducing device 107 such as an HDD is provided in addition to a recording device such as a DVD-RAM.
Recording is continued to (step 305). Recording on the HDD is started immediately after the value falls below the threshold, but recording on the DVD-RAM continues for several VOBUs after the value falls below the threshold.
By doing so, data is overlapped by several VOBUs, and connection at the time of performing seamless reproduction is facilitated.

The recording address information and the remaining disk information output from the DVD-RAM drive are similarly output from the HDD recording / reproducing apparatus, and are recorded as file system information by the recording / reproducing control means 112 and the HDD recording / reproducing apparatus 10.
7 and recorded. Therefore, the recording / reproduction control means 1
Reference numeral 12 denotes information recorded on a DVD-RAM and an HDD.
VOBU by managing information and two recorded in
Address management can be performed on a unit basis, and seamless reproduction (processing 308) performed after the end of recording can be performed. When a program is recorded on the HDD, the digital signal recording / reproducing apparatus according to the present invention prompts the user at the end of recording the program.
D has a function of notifying that a program is recorded (process 306). The user can select whether or not to immediately play back the recorded program (step 307). If the user wants to play back the program immediately, as described above, the disc and the disc are stored on the basis of the file system information including the VOBU address information. Perform seamless playback across HDDs (process 30
8). After the reproduction is completed (step 309), the user
It is possible to select whether to record the data left in the disk on the disk (process 310). This is for the following reason.

For example, when a drama or the like is recorded, there are two types of users: a user who does not need the recorded data once, and a user who wants to record and save the drama on a disk every time. Preferred (Process 3
10). If the user does not need the recorded data, the user does not need to leave the recorded data on the disk, so the user selects whether or not to delete the data recorded on the disk (process 311). If deletion is specified, both data recorded on the disk and data saved on the HDD are deleted (step 312). By this processing, unnecessary areas can be deleted and the recordable area can be increased. Even when the data recorded on the disk is not deleted, the data remaining on the HDD is deleted (process 313) to prepare for the next data recording.

At step 307 or 310, the HDD
If the user wants to collectively save the data saved in the same disk on one disk, the user is asked to delete the unnecessary data portion of the inserted current disk by the data saved in the HDD. In step 314, the user can select whether or not the saved data can be copied and whether or not the data can be stored on one disk. If the user deletes unnecessary data from the disk and the data saved on the HDD can be copied to the disk,
The backup data in the HDD is copied to the deleted empty area (step 315). At this time, the file system information of the HDD is also recorded in addition to the file system information of the disk. As a result, all VOBU addresses can be managed with one disc, and data can be reproduced by another reproducing apparatus.

Thereafter, the copied save data of the HDD is deleted (step 316). If the discs cannot be accommodated even if the discs are arranged in the process 314, it is considered that the user inserts a new disc and the discs are combined into one disc. First, the data and file system information recorded on the disc are copied
D is temporarily evacuated (process 317). Then, when the evacuation is completed, the user is notified and a request is made to insert a new disk (step 318). The wait state continues until the user inserts a new disk (step 319). When the user inserts a disk, the free space of the inserted disk is checked, and the data originally recorded on the HDD and the saved data are checked. If there is enough free space for copying, the data saved in the saved HDD is recorded on the disk, and the data saved in the HDD is deleted (step 320). If the disc is not inserted in the process 319, the data saved in the HDD is deleted and the process ends (process 321).

As described above, the means for detecting the remaining amount of the inserted disk and the HDD, which is a recording / reproducing device separate from the inserted disk, are provided. Even if the program cannot be recorded,
By continuing the recording to the DD, it is possible to record until the end of the program without ending the program recording halfway.

The VOBU of each disk and HDD
By providing the means for managing the address information and the recording address information, it is possible to seamlessly reproduce the data recorded over the disk and the HDD when the user views after recording.

After the recording is completed, a means for notifying the user that one program recording is recorded over the disk and the HDD is provided, and an unnecessary area of the inserted disk is deleted or a new disk is deleted. By inserting the data saved in the HDD and copying the data to the disk, it is possible to collectively record data recorded over the disk and the HDD on one disk.

Further, the user can view the recorded program once and select whether to delete the program or collectively record and save the recorded program on one disk. This makes it possible to satisfy the needs of both users who do not leave program records and users who want to store them on one disc.

As described above, the disc recording / reproducing apparatus uses the DVD-R
By incorporating a non-removable recording medium, such as an HDD, in addition to a removable recording medium, such as an AM, the recordable area of the recording medium falls below a set threshold during data recording, and data is stored in the DVD-RAM. Even when the recording becomes impossible, the recording is continued to the HDD, and the recording can be performed until the end of the program without ending the program recording halfway.

Further, the data recorded on the HDD can be seamlessly reproduced across the disk and the HDD without copying the data to the disk, and the data recorded on the HDD can be stored on one disk. .

[0036]

As described above, according to the present invention, in addition to a removable recording medium such as a DVD-RAM, a non-removable recording medium such as an HDD is built in a disk recording / reproducing apparatus, thereby enabling recording during data recording. Even if the recordable area of the medium falls below the set threshold value and the data cannot be recorded on the DVD-RAM, the recording is continued on the HDD, and the recording of the program is not stopped halfway until the end of the program. It was realized.

Further, the data recorded on the HDD can be seamlessly reproduced across the disk and the HDD without being copied to the disk, and the data recorded on the HDD can be stored on one disk. The usability has been improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a digital signal recording / reproducing means having two different storage media.

FIG. 2 is a view for explaining an MPEG2 system stream and an address management method recorded on a recording medium.

FIG. 3 is a diagram showing a procedure for solving the problem.

[Explanation of symbols]

101: an antenna for receiving digital data of the MPEG system, 102: a receiver for receiving data and processing the signal, 1
03: Antennas 103 and 104 for receiving analog data of the NTSC system, which is one of the standard television systems, receivers for receiving and processing the data, 105 ... Input signal selecting means for selecting data after the signal processing, 106 ... VOBU
Means for detecting the information 107; a large-capacity recording / reproducing device represented by an HDD; 108, a DVD-RAM drive for recording / reproducing using a recording medium which can be taken out by a user; 109 ... recorded on a disk Data address information, 110: means for generating file system information, 111: means for detecting the remaining amount of the disk from a recording / reproducing means such as a DVD-RAM drive, 112: recording / reproducing control means, 113: microcomputer, 201: VOBU , 20
2 VOB, 203 V_PCK, audio information, 204
A_PCK, 205... Sub-picture information SP_PCK, 206
... PGCI, 207 ... ProgRAM, 208 ... Cel
1, 209 ... M_VOBI, 210 ... TMAP, 301
... Checking the remaining amount of the disk, 302..., Selecting whether to record on the disk or the HDD according to the check result, 303... Recording on the disk, 304. 306: Notifying the user that the program is recorded on the HDD, 307: The user can select whether or not to immediately reproduce the recorded program, 308: Seamless reproduction, 309: End of reproduction , 310... The user can select whether or not to record the data left in the HDD on the disc. 311... The user can select whether or not to delete the data recorded on the disc. 312. , Delete both the data saved in the HDD and 313 ... delete the data left in the HDD,
314: allows the user to select whether or not to fit on one disk 315: copies the saved data in the HDD to the deleted empty area 316: deletes the saved data in the HDD 317: recorded on the disk Temporarily save data to HDD 318 ... Request to insert new disk 319 ... Wait state continues until new disk is inserted, 320 ... Record data saved to HDD and save to HDD 321... If no disk is inserted, delete the data saved in the HDD and end.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/781 H04N 5/781 510Z 5/85 5/91 L 5/92 5/92 H 5/937 5 / 93 CF term (reference) 5C052 AA04 AC10 CC01 DD10 5C053 FA23 FA25 HA21 HA32 LA06 5D044 AB05 AB07 BC01 BC06 CC03 CC04 DE25 DE38 DE49 EF05 FG18 GK12 HL02 HL07 5D077 AA08 AA22 AA30 AA38 A02A05A12 AA29 DA01 DA06 DA11 DA14 DA18 DB03 DB11 DC05 DC16 DD07

Claims (12)

[Claims] 1. A digital system comprising: recording / reproducing means for recording / reproducing digital data on / from a removable recording medium; and recording / reproducing means for recording / reproducing digital data on a recording medium provided separately from the removable recording medium. In a signal recording / reproducing apparatus, when recording is performed in units of a combination of video information, audio information, and sub-video information, unique numbers are assigned to the recording addresses of the units in the order of recording, and the above two types of recording / reproducing are performed. In addition to the means, a table for managing unique numbers recorded in the two recording / reproducing means is provided. When reproduction is performed over two recording media, the unique numbers recorded in the management table are provided. Is played back in sequence so that the removable recording medium and the built-in non-removable recording Digital signal recording and reproducing method characterized by the data recorded over two recording medium of the body, playing seamlessly. 2. The digital signal recording / reproducing method according to claim 1, wherein the detection of the fact that the recordable area of the removable recording medium has fallen below a set threshold value is performed, and the data is transferred to the provided non-removable recording medium. At the time of recording, the threshold value is characterized by being at least a unit unit composed of a combination of video information, audio information, and sub-video information. 3. The digital signal recording / reproducing method according to claim 1, wherein a table for managing unique numbers recorded in said two recording / reproducing means is provided on a provided non-removable recording medium. 4. The digital signal recording / reproducing method according to claim 1, wherein after reproducing the recorded data, data comprising a unit of video information, audio information, and sub-video information recorded on a built-in non-removable recording medium. When data consisting of units of video information, audio information, and sub-video information recorded on a removable recording medium are collectively recorded on one removable recording medium, they are assigned to each recording address of the unit. By recording the address management information of the non-removable recording medium and the removable recording medium on one removable recording medium based on the unique number, the one removable recording medium It is also characterized in that it can be reproduced even by the disc reproducing device of the above. 5. The removable recording medium according to claim 4, wherein the user can select a removable recording medium newly prepared by the user or a removable recording medium currently inserted. There is a feature. 6. The digital signal recording / reproducing method according to claim 1, wherein after the recorded data has been reproduced, the data recorded on the non-removable recording medium and the data recorded on the retrievable recording medium are read. When the recording is not collectively performed on one removable recording medium, the data recorded on the removable recording medium is deleted. 7. The digital signal recording / reproducing method according to claim 1, wherein after the recorded data has been reproduced, the data recorded on the non-removable recording medium and the data recorded on the retrievable recording medium are read. When recording is not collectively performed on one removable recording medium, the data recorded on the provided non-removable recording medium and the data recorded on the removable recording medium are deleted. 8. Recording / reproducing means for recording / reproducing digital data on / from a removable recording medium, recording / reproducing means for recording / reproducing digital data on a non-removable recording medium provided separately from the removable recording medium, In the digital signal recording / reproducing apparatus having the above, when recording is performed in units of a combination of video information, audio information, and sub-video information, unique numbers are assigned to the recording addresses of the units in the order in which they are recorded. In addition to the two recording / reproducing means, the apparatus has means for managing unique numbers recorded in the two recording / reproducing means. When reproduction is performed over two recording media, it is recorded in the management table. Means for controlling playback so that the unique numbers are serial numbers A digital signal recording / reproducing apparatus characterized by seamlessly reproducing data recorded over two recording media that cannot be attached to and removed from the recording medium. 9. The removable recording medium of the digital signal recording / reproducing apparatus according to claim 8, further comprising: means for detecting that a recordable area has fallen below a set threshold value; Means for setting in units of a combination of video information, and when the area recordable on a removable recording medium falls below a set threshold value, recording data on a built-in non-removable recording medium. Features. 10. The digital signal recording / reproducing apparatus according to claim 8, wherein the user is notified that one program has data recorded over a removable recording medium and a built-in non-removable recording medium. It is characterized by having. 11. The digital signal recording / reproducing method according to claim 1, wherein when one program is recorded over a removable recording medium and a built-in non-removable recording medium, the user cannot take out the built-in program. It is characterized in that it is possible to select whether or not to delete data recorded on a simple recording medium. 12. The digital signal recording / reproducing method according to claim 1, wherein when one program is recorded over a removable recording medium and a built-in non-removable recording medium, the user can retrieve the recording. It is characterized in that it is possible to select whether or not to delete data recorded on a medium and a built-in non-removable recording medium.