JP3540717B2 - Information recording / reproducing apparatus and information recording / reproducing method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an information recording / reproducing apparatus and an information recording / reproducing method capable of recording / reproducing data on / from an optical disk such as a DVD and recording / reproducing data on / from a hard disk.
[0002]
[Prior art]
2. Description of the Related Art In recent years, an optical disk reproducing apparatus for moving images, which reproduces an optical disk on which data such as video and audio are recorded, has been developed, and is widely used for purposes such as movie software and karaoke, such as an LD and a video CD.
[0003]
Among them, a DVD standard that uses the internationally standardized Moving Image Coding Expert Group (MPEG2) system and adopts the AC3 audio compression system has been proposed.
[0004]
According to the MPEG2 system layer, this standard supports MPEG2 for video compression, AC3 audio and MPEG audio for audio, and special playback such as sub-picture data with bitmap data run-length-compressed for subtitles and fast forward / rewind. Control data (navi pack) is added.
[0005]
Further, this standard supports ISO9660 and micro UDF so that data can be read by a computer.
[0006]
Further, as the standard of the medium itself, following the DVD-ROM which is a medium used for DVD-Video, the standard of DVD-RAM (2.6 GB) has been completed, and the DVD-RAM drive has also been used as a computer peripheral device. It is starting to spread.
[0007]
At present, the RTR-DVD (Real Time Recorder) standard, which is a DVD video standard capable of real-time recording and reproduction using the DVD-RAM, is being completed, and verification work is scheduled to be completed in the spring of 2000. . This standard is considered based on the DVD-Video standard currently on the market. Further, a file system corresponding to the RTR-DVD is currently being standardized. Therefore, DVD video using RTR-DVD has begun to be released.
[0008]
Some PCs with a built-in TV tuner are on the market, and TV programs can be recorded on an HDD (hard disk drive). Some of such PCs can realize a time slip function of reproducing previously recorded video during recording.
[0009]
[Problems to be solved by the invention]
However, when a DVD-RAM is used as a recording medium for a TV program and the recording rate is high, video data recorded on another track cannot be reproduced during recording. . That is, there is a problem that the time slip function using the DVD-RAM cannot be realized.
[0010]
SUMMARY OF THE INVENTION It is an object of the present invention to provide an information recording / reproducing apparatus and an information recording / reproducing apparatus capable of recording a series of data on an optical disk and simultaneously reproducing the series of data. It is to provide a reproduction method.
[0011]
[Means for Solving the Problems]
In order to solve the above problems and achieve the object, an information recording / reproducing apparatus and an information recording / reproducing method of the present invention are configured as follows.
[0012]
(1) An information recording / reproducing apparatus according to the present invention comprises: an optical disk drive for recording data on an optical disk; and a hard disk drive for recording data on a hard disk capable of recording and reproducing data at a higher speed than the optical disk and reproducing the recorded data. Recording control means for recording a series of data together with management information on both the optical disk and the hard disk by the optical disk drive and the hard disk drive, and detecting an error when recording data by the optical disk drive, and performing error recording. Error management means for managing the CDA error information relating to the CDA, and when recording of a series of data by the recording control means is completed, the data is not correctly recorded on the optical disk based on the CDA error information managed by the error management means. C The correct CDA data corresponding to the A data is read from the hard disk, the correct CDA data is recorded on the optical disk, and the correct CDA data is recorded on the optical disk such that the correct CDA data is reproduced in place of the incorrectly recorded CDA data. Error handling means for updating the management information.
[0013]
(2) An information recording / reproducing apparatus according to the present invention comprises: an optical disk drive for recording data on an optical disk; and a hard disk drive for recording data on a hard disk capable of recording and reproducing data at a higher speed than the optical disk and reproducing the recorded data. A recording control unit for recording a series of data on both the optical disk and the hard disk by the optical disk drive and the hard disk drive; a reproduction instruction receiving unit for receiving a reproduction instruction; And reproduction control means for reading out and reproducing the target data recorded on the hard disk when a predetermined reproduction instruction is received by the reproduction instruction reception means while recording is performed on both of them.
[0014]
(3) In the information recording / reproducing method of the present invention, a first step of recording a series of data together with management information on a CDA basis on both an optical disk and a hard disk, and an error in data recording on the optical disk in the first step. A second step of detecting and managing the CDA error information relating to the error-recorded CDA; and when the recording of a series of data in the first step is completed, the CDA error information managed by the second step is added. A third step of reading the correct CDA data corresponding to the CDA data not correctly recorded on the optical disc from the hard disk and recording the correct CDA data on the optical disc; and replacing the incorrectly recorded CDA data with the third step. Write on the optical disk so that the correct CDA data is And a fourth step of updating the management information.
[0015]
(4) In the information recording / reproducing method of the present invention, a first step of recording a series of data on both the optical disk and the hard disk, and a series of data is recorded on both the optical disk and the hard disk by the first step. A second step of reading and reproducing target data recorded on the hard disk when a predetermined reproduction instruction is received.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
DVD stores data in a normal file format. Further, the title corresponds to, for example, one movie, and a plurality of titles are stored on one disc. A collection of the titles is called a title set, and the title set is composed of a plurality of files.
[0018]
FIG. 2 is a diagram illustrating an example of a directory structure of a DVD. As shown in FIG. 2, a directory exists for each standard in DVD, VIDEO_TS for DVD-Video, AUDIO_TS for DVD-Audio, and DVD_RTR for RTR-DVD. Each record data exists in this directory.
[0019]
Furthermore, in DVD-Video, one disc has a file called Video Manager (hereinafter referred to as VMG) as information for managing the disc.
[0020]
Further, in a title set (hereinafter, referred to as VTS), information for managing the title set includes a management information file of Video Title Set Information (hereinafter, referred to as VTSI), a video file including video data, and a VTSI. Consists of backup files.
[0021]
In the RTR-DVD, the VTSI and the VMGI are put together to form a new VMGI.
[0022]
The video file has a hierarchical structure. As shown in FIG. 3, one file (VOBS) is composed of a plurality of VOBs, one VOB is composed of a plurality of VOBUs, and one VOBU is composed of a plurality of various It is composed of packs (video packs and audio packs) made up of various types of data. A pack is composed of one or more packets and a pack header. FIG. 3 is a diagram showing the structure of the VOBS.
[0023]
The order in which data is reproduced is defined by a PGC (Program Chain). A plurality of PGs (Programs) are registered in the PGC, a cell is registered in the PG, and a cell is set as an object to be reproduced. VOB is registered.
[0024]
The PGCI actually records the structure of the PGC. The reproduction process is performed according to the PGCI, and the PGCI is created at the time of recording or editing.
[0025]
In the DVD-RAM, a special PGC for reproducing in the recording order is called an original PGC, and information of the original PGC is recorded in ORG_PGCI. FIG. 4 is a diagram showing data in a CI on a DVD. FIG. 5 is a diagram showing data in the VOBI of the DVD.
[0026]
A pack is a minimum unit for performing data transfer processing. Further, the minimum unit for performing logical processing is a cell unit, and the logical processing is performed in this unit.
[0027]
Next, with reference to FIG. 1, a description will be given of an information recording / reproducing apparatus for reproducing information recorded on the DVD described above and recording information such as a movie on the DVD.
[0028]
As shown in FIG. 1, the information recording / reproducing apparatus includes an MPU unit 10, a display unit 14, a decoder unit 20, an encoder unit 30, a TV tuner unit 41, an STC unit (System Time Counter) 42, a D-PRO unit 43, and temporary storage. Unit (hereinafter referred to as HDD (hard disk drive)) 44, disk drive unit 45, key input unit 46, V mixing unit 47, frame memory unit 48, TV D / A unit 49, audio D / A unit 50, And a selector section 51 and the like.
[0029]
The MPU unit 10 includes a work RAM unit 11, a directory detection unit 12, a multi-management information creation unit 13, and the like. Further, the work RAM unit 11 includes an error address information holding unit 11a. The encoder unit 30 includes an A / D unit 31, a video encoding unit 32, an audio encoding unit 33, an SP encoding unit 34, a formatter unit 35, a buffer memory unit 36, and the like. The decoder unit 20 includes a separation unit 21, a video decoding unit 22, an SP decoding unit 23, an audio decoding unit 24, a V-PRO unit 25, and the like.
[0030]
The flow of the video signal is as follows. First, the input AV signal is digitally converted by the A / D unit 31. The digital signal is input to each of the encoding units 32, 33, and. The video signal is input to the video encoding unit 32, the audio signal is input to the audio encoding unit 33, and character data such as teletext is input to the SP encoding unit. A video signal is subjected to MPEG compression, an audio signal is subjected to AC3 compression or MPEG audio compression, and character data is subjected to run-length compression.
[0031]
Each of the encoding units 32, 33, and 34 is packetized so as to have 2048 bytes when the compressed data is packed, and is input to the formatter unit 35. In the formatter unit 35, each packet is packed, multiplexed, and sent to the D-PRO unit 43.
[0032]
The D-PRO unit 43 adds an error correction code doubly for every 16 packs to form an ECC (Error Correction Code) block. The data of the ECC block generated by the D-PRO unit 43 is recorded on a disk by the disk drive unit 45.
[0033]
Here, when the disk drive unit 45 is busy because of a seek or track jump, the data to be recorded is put into the HDD 44 and waits until the disk drive unit 45 is ready.
[0034]
Further, the formatter unit 35 creates each piece of segmentation information during recording and sends it to the MPU unit 10 periodically (such as a GOP head interrupt). The segmentation information includes the number of VOBU packs, the end address of the I picture from the beginning of the VOBU, and the playback time of the VOBU. In a recording / reproducing DVD, a video file is one file per disk.
[0035]
In the information recording / reproducing apparatus, when accessing data recorded on a DVD, at least a continuous sector is required in order to continue reproduction without interruption during access (seek). This unit is called CDA (Continius Data aria). This CDA is more advantageously in ECC block units. For this reason, the CDA size is set to a multiple of 16, and the file system records data on a CDA basis. However, in this case, when there is no free space of the size of the CDA in the disk, a short sector used by another file can be allowed to enter the CDA. Thereby, recording can be performed in CDA units.
[0036]
When writing data such as a movie to the DVD-RAM (during recording), the same data is also written to the HDD 44 to perform various special processing.
[0037]
Here, the recording process to the DVD-RAM will be described with reference to the flowchart shown in FIG.
[0038]
The following processing is performed at the time of data recording.
[0039]
ST1: Check the respective file systems of the DVD-RAM and HDD, and if not, construct a file system (management information).
[0040]
ST2 to ST3: When there is no free space in the HDD, a guidance such as "no recording space" is displayed.
[0041]
ST4: Check the directory of the DVD-RAM, and if there is no RTR directory, create the directory. The VMGI is read from the DVD-RAM in the work RAM, and if not, it is generated internally to construct a VMGI table.
[0042]
ST5 to ST6: Initial setting for recording is performed in the encoder unit 30, and recording start setting is performed.
[0043]
ST7 to ST8: When the encoded data has accumulated for one CDA, the setting is made in each drive unit so that the encoded data is recorded in both the DVD-RAM and HDD free areas, and the link information of the sector to be recorded is stored in the work RAM.
[0044]
ST9 to ST10: If there is a cut-in information input interrupt, the cut-in information is fetched from the formatter unit 35, and the interrupt processing shown in the flowchart of FIG. 7 is executed.
[0045]
ST11 to ST12: When an error is returned from the disk drive unit 45 during recording on the DVD-RAM, the address information of both the DVD-RAM and the HDD of the CDA to which the sector in which the error occurred belongs is stored in the work RAM.
[0046]
Repetition of ST7 to ST13: At the stage when one GOP has been encoded, the VOBU management information is read from the encoder unit 30 and loaded into the work RAM, and the process is repeated until a recording end command is issued.
[0047]
ST14 to ST15: The disk drive unit 45 checks whether an error has occurred during recording. If an error has occurred, the error CDA in the DVD-RAM is released based on the information of the CDA in which the error has occurred. The AV data (error-free CDA data) of the same CDA in the HDD is read and recorded in another free area in the DVD-RAM. The link information in the work RAM is rewritten to the rewritten CDA link information.
[0048]
ST16: Update the file systems of the DVD-RAM and HDD based on the link information. At this time, if there is a sector in which an error has occurred, the file system is set based on the information so that the sector is not used at the next recording.
[0049]
Here, in the processing being performed, when a writing error (ID error or the like) occurs during recording, the fact is notified from the disk drive unit 45 to the MPU unit 10, and at that time, the sector in which the error has occurred belongs. The address information of the current CDA is stored in both the HDD and the DVD-RAM, and at the end of recording, the erroneous CDA is read from the HDD (according to the stored address information), and is recorded in another area of the DVD-RAM. In this case, the link information (address information) of the CDA in which the error has occurred is replaced with the address information of the newly recorded CDA, and the information of the sector in which the error has occurred further prevents the file from being written at the next writing. Set up the system. Also, a portion of the CDA containing an error that has no error is released as a free area.
[0050]
If an error occurs during recording, the fact or the number of errors is displayed on the display unit 14 to inform the user of the degree of anxiety of the DVD-RAM disc, and the user can use this information as a guide for disc replacement. can do.
[0051]
Referring to the flowcharts shown in FIGS. 8 and 9, two examples of pre-processing for making the HDD a DVD-RAM buffer will be described.
[0052]
The first method is to cut a partition having the same capacity as that of the DVD-RAM disk into the HDD as shown in FIG. 8, and this method will be described below.
[0053]
ST31: Check the total capacity of the DVD-RAM.
[0054]
ST32: Partition an area corresponding to the capacity of the DVD-RAM into the HDD.
[0055]
ST33 to ST34: Check whether the disk is unused, and if not, copy all data in the DVD-RAM to the HDD.
[0056]
In the second method, as shown in FIG. 9, a partition having the same capacity as the free space of the DVD-RAM disk is cut in the HDD. This method is described below.
[0057]
ST41: Check the free space of the DVD-RAM.
[0058]
ST42: A partition having the same capacity as the free space of the DVD-RAM is cut in the HDD.
[0059]
Here, when an area is reserved for the free space or when data is deleted, the buffer area in the HDD needs to be increased.
[0060]
When a playback command is issued (time slip) during the recording described with reference to the flowcharts shown in FIGS. 6 and 7, the playback processes in the flowcharts shown in FIGS. 10 and 11 are executed in parallel for each task. . Here, the flowcharts shown in FIGS. 10 and 11 will be briefly described.
[0061]
FIG. 10 is a flowchart for explaining the entire reproduction operation.
[0062]
ST51 to ST52: If NG is found by the disk check, error processing is performed.
[0063]
ST53 to ST56: If any one of the volume structure, the DVD_RTR directory, and the CDA table is missing, guidance of "not recorded" is displayed.
[0064]
ST57: The CDA table is read.
[0065]
ST58 to ST59: If an error occurs, guidance such as "An error has occurred in the file system" is displayed.
[0066]
ST60 to ST64: If VMG is recorded on the disc, VMG is read, and if VRO file is recorded, PGC to start reproduction is determined. If the VMG is not recorded or the VRO file is not recorded, a guidance such as "not recorded" is displayed.
[0067]
ST65: CDA processing at the start of reproduction is performed.
[0068]
ST66: Each initial setting of the MPEG video decoder, SP decoder, and Audio decoder is performed.
[0069]
ST67: Processing at the time of cell reproduction is performed.
[0070]
ST68 to ST73: Until the reproduction is completed, the next cell is set from the PGCI, and if the setting of the decoder is changed, the setting of the decoder is changed by the next sequence end code. For example, the MPEG decoder is set to the free-run mode, and the seamless connection flag is set.
[0071]
ST74 to ST77: When the reproduction is completed and there is an error, a guidance such as "readout error" is displayed, and the processing shifts to reproduction end processing. If there is no error, the processing shifts to other processing at the end of reproduction.
[0072]
FIG. 11 is a flowchart for explaining a process at the time of cell reproduction.
[0073]
ST81: The start EP (LBN) and the end EP of the cell are determined from the contents of the PGCI and TMAPI, and the cell start EP is set as the read EP.
[0074]
ST82: Set start address of CDA to be read and read length.
[0075]
ST83 to ST85: If the length of the CDA to be read is longer than the remaining cell length, the read length is set to the remaining cell length and the remaining cell length is set to 0. Conversely, the length of the CDA to be read is shorter than the remaining cell length. Then, the value obtained by subtracting the length of the CDA to be read from the remaining cell length is set as the remaining cell length, and the read length is set to the length of the CDA.
[0076]
ST86: Set a data read command in the drive section.
[0077]
ST87 to ST89: When the transfer is started, the seamless connection flag is set, the sum of the read FP and the read length is set as the read FP, the MPEG decoder is set to the normal mode, and the seamless connection flag is reset.
[0078]
ST90 to ST91: When the transfer ends and the remaining cell length becomes 0, the process ends.
[0079]
ST92 to ST97: When the transfer is not completed and fast-forward is instructed, the jump direction is set to the positive direction and read_fp is set by the jump amount, and when rewind is instructed, the jump direction is set to the negative direction and read_fp is set by the jump amount. , A CDA process at the time of trick play is executed.
[0080]
Further, it is necessary to select a medium to be reproduced as pre-processing of the above-described reproduction processing. Here, since the HDD is used as a buffer, the HDD is played back during recording, and the DVD-RAM is played back when not recording. Here, the reproduction media selection processing will be described with reference to FIG.
[0081]
ST100: Initial settings are made.
[0082]
ST101 to ST102: Key input is performed, and the input key is interpreted.
[0083]
ST103: If the input key is a recording command, a recording process is executed.
[0084]
ST104 to ST105: The input key is a reproduction command. If recording is being performed, the HDD is selected as the reproduction medium, and in the normal case, the DVD-RAM is selected as the reproduction medium, and the reproduction process is executed.
[0085]
When the HDD is used not only as a buffer but also as a normal medium for recording a normal program or the like, it is possible to select the HDD in the case of normal processing by the user's selection. .
[0086]
Since the write / read time of the HDD is much shorter than that of the DVD-RAM, the HDD can read another area during recording. As a display method at this time, as shown in FIG. 13, it is conceivable to display a recording-in-progress screen as a picture-in-picture in a reproduction screen, or to display only a recording time. This makes it possible to check the progress of recording while looking at the playback screen.
[0087]
In addition, by making the buffer portion used invisible to the user, the buffer area can be used without being conscious of the user. That is, when an instruction to record data (record) on the DVD-RAM is received via the key input unit 46 (the user simply instructs recording on the DVD-RAM), as described above, the DVD-RAM Recording is started in both the HDD 44 and the HDD 44, and an error handling process is executed.
[0088]
【The invention's effect】
According to the present invention, it is possible to provide an information recording / reproducing apparatus and an information recording / reproducing method capable of recording a series of data on an optical disc and simultaneously reproducing the series of data.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of an information recording / reproducing apparatus for reproducing information such as a movie recorded on a DVD and recording information such as a movie on a DVD.
FIG. 2 is a diagram showing an example of a directory structure of a DVD.
FIG. 3 is a diagram showing a data structure of a video object set (VOBS) on a DVD.
FIG. 4 is a diagram showing data in a CI on a DVD.
FIG. 5 is a diagram showing data in VOBI on a DVD.
FIG. 6 is a flowchart showing a recording process on a DVD-RAM.
FIG. 7 is a flowchart showing an interrupt process.
FIG. 8 is a flowchart showing a method of cutting a partition having the same capacity as a DVD-RAM disk into an HDD.
FIG. 9 is a flowchart showing a method of cutting a partition having the same capacity as the free space of a DVD-RAM disk into an HDD.
FIG. 10 is a flowchart for explaining the entire reproduction operation.
FIG. 11 is a flowchart for explaining processing at the time of cell reproduction.
FIG. 12 is a flowchart showing an entire operation process.
FIG. 13 is a diagram showing an example of a screen display in a case where reproduction is performed during recording on a DVD-RAM.
[Explanation of symbols]
Reference Signs List 10 MPU unit 11 Display unit 20 Decoder unit 30 Encoder unit 41 TV tuner unit 42 STC unit 43 D-PRO unit 44 Temporary storage unit 45 Disk drive unit 46 Key input unit 47 V mixing Unit 48 frame memory unit 49 TV D / A unit 50 audio D / A unit 51 selector unit

Claims (4)

An optical disk drive for recording data on an optical disk;
A hard disk drive that records data on a hard disk capable of recording and reproducing data faster than an optical disk and reproduces the recorded data;
Recording control means for recording a series of data together with management information in CDA units on both the optical disk and the hard disk by the optical disk drive and the hard disk drive;
Error management means for detecting a sector in which an error has occurred during data recording by the optical disk drive, and managing CDA error information on a CDA to which the sector in which the error has occurred belongs ;
When recording of a series of data by the recording control means is completed, correct CDA data corresponding to the CDA data not correctly recorded on the optical disk is read from the hard disk based on the CDA error information managed by the error management means. records the data of the correct CDA on the optical disc correctly correct CDA of data instead of the data recorded has not been CDA updates the management information recorded on the optical disc to be played, a sector in which an error occurs Error handling means for setting not to be used and releasing a portion where no error has occurred in the CDA including the sector where the error has occurred as an empty area ;
An information recording / reproducing apparatus comprising:   An optical disk drive for recording data on an optical disk;
  A hard disk drive that records data on a hard disk capable of recording and reproducing data faster than an optical disk and reproduces the recorded data;
  Recording control means for receiving an instruction to record data on an optical disk, and recording a series of data together with management information on both the optical disk and the hard disk by the optical disk drive and the hard disk drive together with management information;
  Error management means for detecting an error when recording data by the optical disk drive and managing CDA error information relating to the CDA on which the error was recorded;
  When recording of a series of data by the recording control means is completed, the correct CDA data corresponding to the CDA data not correctly recorded on the optical disc is read out from the hard disk based on the CDA error information managed by the error management means. Error handling means for recording the correct CDA data on the optical disc and updating the management information recorded on the optical disc so that the correct CDA data is reproduced in place of the incorrectly recorded CDA data;
  Before recording a series of data on both the optical disk and the hard disk by the recording control unit, an area securing unit for securing a partition of an area having the same capacity as the optical disk on the hard disk;
  An information recording / reproducing apparatus comprising:   An optical disk drive for recording data on an optical disk;
  A hard disk drive that records data on a hard disk capable of recording and reproducing data faster than an optical disk and reproduces the recorded data;
  Recording control means for receiving an instruction to record data on an optical disk, and recording a series of data together with management information on both the optical disk and the hard disk by the optical disk drive and the hard disk drive together with management information;
  Error management means for detecting an error when recording data by the optical disk drive and managing CDA error information relating to the CDA on which the error was recorded;
  When recording of a series of data by the recording control means is completed, correct CDA data corresponding to the CDA data not correctly recorded on the optical disc is read from the hard disk based on the CDA error information managed by the error management means. , This correct CDA de Error handling means for recording data on an optical disc and updating management information recorded on the optical disc so that correct CDA data is reproduced in place of CDA data that was not correctly recorded;
  Before recording a series of data on both the optical disk and the hard disk by the recording control unit, an area securing unit for securing a partition of an area having the same capacity as the free space of the optical disk on the hard disk;
  An information recording / reproducing apparatus comprising:   A first step of recording a series of data on both an optical disk and a hard disk together with management information in CDA units;
  A second step of detecting a sector in which an error has occurred during data recording on the optical disc in the first step, and managing CDA error information on a CDA to which the sector in which the error has occurred belongs;
  When a series of data recording in the first step is completed, correct CDA data corresponding to the CDA data not correctly recorded on the optical disc is stored on the hard disk based on the CDA error information managed in the second step. A third step of reading the data from the CDA and recording the correct CDA data on the optical disc;
  The management information recorded on the optical disk is updated so that the correct CDA data is reproduced in place of the CDA data that has not been correctly recorded, and the sector in which the error has occurred is set not to be used. A fourth step of releasing a portion where no error has occurred in the CDA including
  An information recording / reproducing method, comprising:

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