JP3637275B2 - Information immediate recording apparatus and information immediate recording method - Google Patents

Information immediate recording apparatus and information immediate recording method Download PDF

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Publication number
JP3637275B2
JP3637275B2 JP2000340957A JP2000340957A JP3637275B2 JP 3637275 B2 JP3637275 B2 JP 3637275B2 JP 2000340957 A JP2000340957 A JP 2000340957A JP 2000340957 A JP2000340957 A JP 2000340957A JP 3637275 B2 JP3637275 B2 JP 3637275B2
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Prior art keywords
recording
information
audio data
video
recording medium
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JP2002152658A5 (en
JP2002152658A (en
Inventor
秀夫 片岡
伸一 菊地
和也 藤田
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株式会社東芝
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention records information on a hard disk or the like, reproduces information recorded on the hard disk or the like, and records information on a recording medium such as a DVD (Digital versatile Disk). The present invention relates to an information recording apparatus capable of reproducing the information recorded in the above. In particular, the present invention relates to an information immediate recording apparatus and an information immediate recording method that eliminate information loss during power-on or DVD replacement.
[0002]
[Prior art]
2. Description of the Related Art In recent years, a moving image-compatible optical disk reproducing apparatus for reproducing an optical disk on which data such as video and audio is recorded has been developed. This apparatus is widely used for the purpose of watching movie software or enjoying karaoke or the like, such as an LD or a video CD playback apparatus.
[0003]
Among them, a DVD standard that uses an internationally standardized MPEG2 (Moving Image Coding Expert Group) system and an AC3 audio compression system has been proposed.
[0004]
According to the MPEG2 system layer, this standard supports the MPEG2 system as a moving picture compression system, and supports the AC3 audio compression system and the MPEG audio compression system as audio compression systems. In addition, sub-picture data obtained by run-length compression of bitmap data can be handled for subtitles such as movies and karaoke. Furthermore, in this standard, special playback control data (navigation pack) such as fast-forward / reverse feed is added in relation to the playback device.
[0005]
Furthermore, this standard supports IS09660 and micro UDF standards so that data on a disc can be read by a computer.
[0006]
In addition to the DVD-ROM standard, which is a DVD-video medium, the DVD-RAM standard (recording capacity of about 4.7 GB) has been completed as the standard of the media itself, and the DVD-RAM drive is also a computer peripheral device It has begun to spread.
[0007]
Furthermore, the DVD video standard that realizes a system capable of recording and reproducing information in real time using DVD-RAM, that is, the RTR (Real Time Recording) -DVD standard is being completed, and the verification work is also completed. ing.
[0008]
This standard is considered based on the DVD-video standard currently on the market. Furthermore, a file system corresponding to the RTR-DVD is also currently standardized.
[0009]
In addition, there has also been an apparatus that records and reproduces a broadcast signal using a hard disk drive (HDD) built in a recording / reproducing apparatus. Some hard disk drives can record data of, for example, 100 Gbytes or more.
[0010]
[Problems to be solved by the invention]
When a hard disk device that records information on a hard disk drive and a DVD device that records information on a DVD are individually considered, both have advantages and disadvantages.
[0011]
In the case of a hard disk device, in a normal usage pattern, the hard disk is built in the device and cannot be taken out. For this reason, it is impossible to store data indefinitely. One day, the recording area will run out. Further, since the data cannot be taken out of the apparatus, the data recorded on the hard disk cannot be reproduced by another apparatus.
[0012]
On the other hand, a DVD device has a smaller storage capacity than a hard disk. However, the DVD is removable from the device and can be carried at any time.
[0013]
An object of the present invention is to provide the following information immediate recording apparatus and information immediate recording method, which have been made in view of the above circumstances.
[0014]
(1) An information immediate recording apparatus that can take advantage of both the hard disk and the DVD and can virtually record information on the DVD virtually even when the recording preparation for the DVD is not completed.
[0015]
(2) An information immediate recording method that makes it possible to virtually record information on a DVD even when the recording preparation for the DVD is not completed, taking advantage of both the hard disk and the DVD.
[0016]
[Means for Solving the Problems]
In order to solve the above-described problems and achieve the object, an information immediate recording apparatus and an information immediate recording method of the present invention are configured as follows.
[0017]
(1) An information immediate recording apparatus according to the present invention includes an input means for inputting video / audio data provided in real time, a built-in second information recording medium, and a video / audio data input by the input means. First recording / reproducing means for recording on or reproducing possible video / audio data recorded on the first information recording medium, and video / audio data input by the input means Is recorded on the second information recording medium, or second recording / reproducing means for reproducing video / audio data recorded on the second information recording medium, and recording preparation for the first information recording medium If recording on the first information recording medium is instructed in a state where the recording is not completed, the second recording / reproducing device records the second information recording medium in place of the first information recording medium. versus And recording preparation for the first information recording medium when the recording control is performed by the first recording control means and the first recording control means for recording the target video / audio data input from the input means. Is completed, the second recording control means for recording the target video / audio data input from the input means onto the first information recording medium by the first recording / reproducing means, and the second recording control means After the recording of the target video / audio data is completed by the recording control of the recording control unit, the target video / audio data recorded on the second information recording medium is read by the first recording control unit, and this reading is performed. Third recording control means for recording the intended video / audio data on the first information recording medium by the first recording / reproducing means, recording control of the second recording control means, and Link data indicating a link of the target video / audio data recorded twice on the first information recording medium twice by the recording control of the recording control means 3 by the first recording / reproducing means. And fourth recording control means for recording on the medium.
[0018]
(2) In the information immediate recording method of the present invention, when recording on the first information recording medium is instructed in a state where preparation for recording on the detachable first information recording medium is not completed, Instead of the information recording medium, the first step of recording the target video / audio data on the built-in second information recording medium, and when the recording by the first step is continued, When the recording preparation for the first information recording medium is completed, the target video is recorded by the second step of recording the target video / audio data on the first information recording medium and the recording of the second step. After the recording of the audio data is completed, the target video / audio data recorded on the second information recording medium in the first step is read, and the read target video / audio data is read as the first information. Recorded on a recording medium Link data indicating a link of target video and audio data recorded twice on the first information recording medium by the third step, the recording by the second step, and the recording by the third step And a fourth step of recording the information on the first information recording medium.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0020]
FIG. 1 is a diagram showing an embodiment of a recording / reproducing apparatus (information immediate recording apparatus) to which the present invention is applied. 1 is roughly divided, the left side shows the main blocks of the recording unit, and the right side shows the main blocks of the reproducing unit. The block of each part in FIG. 1 will be described in detail later.
[0021]
FIG. 2 shows a part of the directory structure of the DVD system.
[0022]
FIG. 2 shows the structure of a directory of a DVD system, particularly a real-time recording DVD (RTR-DVD) (shown here as DVD_RTAV).
[0023]
In the directory (DVD_RTAV), VR_MANGR. IFO, VR_MOVIE. As a movie video file. VRO, VR_STILL. As a still picture video file. VRO, VR_AUDIO. As a still picture video file. VRO, VR_MANGR. As a backup of the video manager. Each file of BUP exists.
[0024]
VR_MANGER. Navigation data is recorded in the IFO file, and this navigation data is data for advancing a program set, a program, an entry point, a playlist, and the like.
[0025]
VR_MOVIE. The VRO file is a so-called movie AV file for recording a movie video object (movie VOB). This VR_MOVIE. VRO is used to record an original VOB composed of a video part including an arbitrary sub-picture unit. At this time, the audio part related to the video part is also included in the original VOB.
[0026]
VR_STILL. VRO is a still picture AV file for recording a still picture VOB.
[0027]
VR_AUDIO. VRO is a still picture additional audio file for recording an additional audio stream for the still picture. This additional audio part indicates an audio stream recorded by after recording. The audio part is VR_STILL. Used in combination with several video parts recorded on VRO.
[0028]
VR_MANGR. BUP is VR_MANGR. This is an IFO backup file.
[0029]
FIG. 3A illustrates the above VR_MOVIE. The file structure of VRO is shown.
[0030]
A video file has a hierarchical structure, and one file is composed of a plurality of VOBs (video objects), one VOB is composed of a plurality of VOBUs (video object units), and one VOBU is composed of a plurality of packs. Composed. As the plurality of packs, there are an RDI pack, a V pack, an A pack, and the like.
[0031]
The V pack is a video data compressed by the MPEG2 system, and is composed of a pack header, a packet header, and a video data portion. The A pack is obtained by processing audio data by a method such as linear PCM, MPEG, or AC3, and includes a pack header, a packet header, and an audio data portion.
[0032]
FIG. 3B shows a video data format based on the MPEG2 system in relation to the V pack.
[0033]
A group of picture (GOP) is a unit compressed using a plurality of video frames, and a sequence header is added to the head of the unit. The sequence header describes the start code (SHC) of the sequence header, the number of vertical lines (HS) of pixels, the number of horizontal lines (VS) of pixels, the aspect ratio (PAR), and the like.
[0034]
The RDI pack shown in FIG. 4 is called a real-time data information pack (RDI_PCK), and includes real-time general information (RDI_GI), display control and copy control information (DCI_CCI), manufacturer information (MNFI), and the like.
[0035]
The real-time general information (RDI_GI) includes information indicating the start time for reproducing the first field of the VOBU to which the real-time general information (RDI_GI) belongs, that is, VOBU_S_PTM, and information indicating the recording time of the VOBU, that is, VOBU_REC_TM.
[0036]
Display control and copy control information (DCI_CCI) includes (DCI_CCI_SS) indicating the status of display control information (DCI) and copy control information (CCI), display control information (DCI) itself, and copy control information (CCI) itself. Including.
[0037]
The display control information status (DCI_SS) of (DCI_CCI_SS) is the first area, and only when valid aspect ratio information exists (01b), when valid aspect ratio, subtitle mode, and film camera mode exist (11b) is identified.
[0038]
Display control information (DCI) includes aspect ratio information, subtitle mode information, and film camera mode.
[0039]
The aspect ratio information indicates a case where the aspect ratio is 4: 3 (000b) and a case where the aspect ratio is 16: 9 (0001b). Further, when the source picture is a letter box, 1000b (letter box (14: 9) but screen center arrangement), 0100b (letter box (14: 9) but screen top arrangement), 1101b (letter box (16: 9)). 9) but screen center arrangement), 0010b (letter box (16: 9) but screen top arrangement), 1010b (letter box (> 16: 9) but screen center arrangement), 0111b (14: 9) (Center placement in full format).
[0040]
The subtitle mode identifies that the subtitle is not opened (00b), the subtitle is in the active image area (01b), and the subtitle is outside the active image area (10b).
[0041]
The film camera mode identifies the camera mode (0b) and the film mode (1b).
[0042]
FIG. 5 shows the hierarchical structure of the video manager (VMG), in which the system for managing the data reproduction order is shown in detail.
[0043]
The playback order of data recorded in a video file is defined by a program chain (PGC) as shown in FIG. In the program chain (PGC), a cell (Cell) is defined, and in the cell (Cell), a VOB to be reproduced is defined. The part where the specific information of this PGC is recorded is the program chain information (PGCI) part in the VMG file. There are two types of PGCI, one is an original PGCI (ORG_PGCI), and the other is a user-defined PGC table (UD_PGCIT).
[0044]
The disc recording / reproducing apparatus standardized as described above will be described with reference to FIG. 1 again.
[0045]
The playback processing in the recording / playback apparatus shown in FIG. 1 is performed according to program chain information (PGCI) indicating the playback order of programs. In this PGCI, a plurality of programs (PG) can be specified. Information (CI) is defined. Then, the cell entry point (C_EPI) is designated by the CI, and the VOB to be reproduced is specified. In addition, a special PGC for reproducing in the recording order is referred to as an original PGC, and information on the original PGC is recorded as ORG_PGCI. Furthermore, the attribute information (resolution information, aspect information, audio attribute information, etc.) of the video data at this time is recorded in stream information (STI) in VMGI. The pack described above is a minimum unit for performing data transfer processing. Further, the minimum unit for logical processing is a cell unit, and logical processing is performed in this unit. Therefore, when recording is performed, the recording signal is converted into a format that matches the above format.
[0046]
The information recording / reproducing apparatus includes a hard disk drive 2001, a disk drive 35 that rotates and drives an optical disk 1001 that is an information storage medium capable of constructing a video file, and reads / writes information from / to the optical disk 1001, and a recording side. The encoder 50, the decoder 60 that constitutes the playback side, and the microcomputer block 30 that controls the operation of the apparatus main body are the main components.
[0047]
The encoder unit 50 includes an ADC (analog / digital converter) 52, a V (video) encoder, an A (audio) encoder, an encoder group 53 including an SP (sub-picture) encoder, and an output of each encoder in a predetermined format. The formatter 56 and the buffer memory 57 are provided.
[0048]
The ADC 52 receives an external analog video signal + external analog audio signal from the AV input unit 42 or an analog video signal + analog audio signal from the TV (television) tuner 44.
[0049]
The ADC 52 digitizes the input analog video signal with, for example, a sampling frequency of 13.5 MHz and a quantization bit number of 8 bits. That is, the luminance component Y, the color difference component Cr (or YR), and the color difference component Cb (or YB) are each quantized with 8 bits.
[0050]
Similarly, the ADC 52 digitizes the input analog audio signal with, for example, a sampling frequency of 48 kHz and a quantization bit number of 16 bits.
[0051]
When a digital video signal or digital audio signal is input to the ADC 52, the ADC 52 causes the digital video signal or digital audio signal to pass through. Further, jitter reduction processing, sampling rate change processing, and the like may be performed on these digital video signals and digital audio signals without changing the contents. However, when the sampling frequency is different, the conversion process is performed.
[0052]
The digital video signal output from the ADC 52 is sent to the formatter 56 via the V encoder. The digital audio signal output from the ADC 52 is sent to the formatter 56 via the A encoder.
[0053]
The V encoder has a function of converting an input digital video signal into a digital signal compressed at a variable bit rate based on the MPEG2 or MPEG1 standard. The A encoder has a function of converting an input digital audio signal into a digital signal compressed at a fixed bit rate or a linear PCM digital signal based on the MPEG or AC-3 standard.
[0054]
When sub-video information is input from the AV input unit 42 (for example, a signal from a DVD video player with an independent output terminal of a sub-video signal), or a DVD video signal having such a data structure is broadcast and is transmitted to the TV tuner 44. Is received, the sub video signal (sub video pack) in the DVD video signal is input to the SP encoder. The sub video signal input to the SP encoder is arranged in a predetermined signal form and sent to the formatter 56.
[0055]
The formatter 56 performs the predetermined signal processing on the input video signal, audio signal, sub-picture signal, etc. while using the buffer memory 57 as a work area, and has been described with reference to FIGS. Recording data that matches the format (file structure) is output to the data processor 36.
[0056]
Here, the apparatus can supply the information encoded by the encoder unit 50 and the created management information to the hard disk device 2001 via the data processor 36 and record the information on the hard disk. Information recorded on the hard disk can also be recorded on the optical disk 1001 via the data processor 36 and the disk drive 35. Furthermore, the information encoded by the encoder unit 50 and the created management information can be recorded on the optical disc 1001 via the data processor 36 and the disc drive 35.
[0057]
Further, according to the present invention, when the information recorded on the hard disk of the hard disk device 2001 is the same as the data format of the optical disk 1001, the information on the hard disk can be recorded on the optical disk without being encoded.
[0058]
If the information recorded on the hard disk of the hard disk device 2001 is different from the data format of the optical disk 1001, the information read from the hard disk is encoded by the encoder unit 50. The encoded information can be recorded on the optical disc 1001.
[0059]
Here, a standard encoding process for creating recording data on the optical disc 1001 will be briefly described. That is, when encoding processing is started in the encoder unit 50, parameters necessary for encoding video (main video) data and audio data are set.
[0060]
Next, the main video data is pre-encoded using the set parameters to calculate the optimum code amount distribution for the set average transfer rate (recording rate). Based on the code amount distribution obtained by the pre-encoding process, the encoding process of the main video data is executed. At this time, the audio data encoding process is also executed. Similarly, parameters necessary for encoding the sub-picture data are set, and the encoded sub-picture data is created.
[0061]
The encoded main video data, audio data, and sub-video data are combined and converted into a video object set VOBS structure.
[0062]
That is, a cell is set as the minimum logical unit of main video data (video data), and cell information as described with reference to FIG. 5 is created. Next, the configuration of the cells that make up the program chain PGC, and the attributes of the main video, sub-video, and audio are set (part of these attribute information is used by the information obtained when each data is encoded) Here, a VMG file including various information is created.
[0063]
The encoded main video data, audio data, and sub-video data are subdivided into packs (FIG. 3) of a certain size (2048 bytes). In the pack, time stamps such as PTS (Presentation Time Stamp) indicating playback time and DTS (Decoding Time Stamp) indicating decoding time are described as appropriate. For the sub-picture PTS, a time arbitrarily delayed from the PTS of the main picture data or audio data in the same reproduction time zone can be described.
[0064]
Each cell is arranged while an RDI pack (corresponding to a navigation pack) is arranged at the head of each video object unit VOBU so that the data can be reproduced in the time code order. Thereby, a video object VOB including a plurality of cells is configured. A video object set VOBS obtained by collecting one or more video objects VOB is recorded as a program in a movie video file.
[0065]
When the DVD playback signal is digitally copied from the DVD video player, the contents of the cell, the program chain, the management table, the time stamp, and the like are determined from the beginning, and it is not necessary to create them again.
[0066]
The parts for reading and writing (recording and / or reproducing) information with respect to the optical disc 1001 include a disc drive 35 having an optical system and a drive system, a data processor 36, a temporary storage unit 37, and an STC (system time). Counter or system time clock) 38.
[0067]
The temporary storage unit 37 buffers a certain amount of data (data output from the encoder unit 50) written to the optical disc 1001 via the data processor 36 and the disk drive 35, and stores the disk drive 35 and the data processor 36. Is used to buffer a certain amount of data reproduced from the optical disc 1001 (data input to the decoder unit 60) via the. The disk drive 35 has a rotation control system, a laser drive system, an optical system, and the like for the optical disk.
[0068]
For example, when the temporary storage unit 37 is composed of a 4 Mbyte semiconductor memory (DRAM), it is possible to buffer recording or reproduction data for about 8 seconds at an average recording rate of 4 Mbps (bits per second). . Further, when the temporary storage unit 37 is composed of 16 Mbytes of EEP (Electrically Erasable and Programmable) ROM (flash memory), recording or reproduction data buffering of about 30 seconds at an average recording rate of 4 Mbps is possible. Is possible.
[0069]
Further, when the temporary storage unit 37 is composed of a 100 Mbyte ultra-small HDD (hard disk drive), it is possible to buffer recording or reproduction data for 3 minutes or more at an average recording rate of 4 Mbps.
[0070]
The temporary storage unit 37 can also be used to temporarily store recording information for a short time until the optical disk 1001 is replaced with a new disk when the optical disk 1001 is used up during recording.
[0071]
However, since the hard disk device 2001 having a large capacity is provided in the device of the present invention, this device can be utilized.
[0072]
The temporary storage unit 37 can also be used to temporarily store data read out from the normal drive within a certain time when a high-speed drive (double speed or higher) is adopted as the disk drive 35. . If the read data at the time of reproduction is buffered in the temporary storage unit 37, the reproduction data buffered in the temporary storage unit 37 is switched and used even when an optical head (not shown) causes a read error due to vibration shock or the like. Thus, it is possible to prevent the playback video from being interrupted.
[0073]
The data processor 36 supplies the DVD recording data output from the encoder unit 50 to the disk drive 35 under the control of the microcomputer block 30, takes in the DVD playback signal reproduced from the optical disk 1001 from the disk drive 35, The management information recorded in 1001 is rewritten, or the data (file or video object) recorded on the optical disc 1001 is deleted.
[0074]
The microcomputer block 30 includes an MPU (micro processing unit) or CPU (central processing unit), a ROM in which a control program and the like are written, and a RAM for providing a work area necessary for program execution. .
[0075]
The MPU of the microcomputer block 30 uses the RAM as a work area according to the control program stored in the ROM, and performs defect location detection, unrecorded area detection, recording information recording position setting, UDF recording, AV address setting, etc. Execute.
[0076]
The microcomputer block 30 includes an information processing unit necessary for controlling the entire system, and includes a copy information detection / setting unit, a directory detection unit, and a VMG management information creation unit.
[0077]
Among the execution results of the MPU, contents to be notified to the user of the disk drive 35 are displayed on the display unit 48 of the DVD video recorder or displayed on the monitor display as OSD (on-screen display).
[0078]
The timing at which the microcomputer block 30 controls the disk drive 36, the data processor 36, the encoder unit 50, and / or the decoder unit 60 can be executed based on the time data from the STC 38. Recording and playback operations are normally executed in synchronization with the time clock from the STC 38, but other processing may be executed at a timing independent of the STC 38.
[0079]
The decoder unit 60 is separated by a separator 62 that separates and extracts each pack from video information having a pack structure as shown in FIG. 3, a memory 63 that is used when performing pack separation and other signal processing, and the separator 62. The V decoder that decodes the main video data (contents of the video pack), the SP decoder that decodes the sub video data (contents of the sub video pack) separated by the separator 62, and the audio data (audio) separated by the separator 62 The decoder group 64 by the A decoder which decodes the pack content) and the sub video data obtained from the SP decoder are appropriately combined with the main video data obtained from the V decoder, and the menu, highlight button, subtitle and other A video processor 66 is provided for outputting the sub-picture superimposed.
[0080]
The output of the video processor 66 is input to the video mixer 71. In the video mixer 71, text data is synthesized. The video mixer 71 is also connected to a line that directly takes in signals from the TV tuner 44 and the A / V input unit 42. A frame memory 72 used as a buffer is connected to the video mixer 71. When the output of the video mixer 71 is a digital output, it is output to the outside via an interface (I / F) 73, and when it is an analog output, it is output to the outside via a DAC 74.
[0081]
When the output of the A decoder is a digital output, it is output to the outside via an interface (I / F) 75, and when it is an analog output, it is analog-converted by the DAV 77 via the selector 76 and output to the outside. The selector 76 can also select the output from the ADC 52 when the signal from the TV tuner 44 or the A / V input unit 42 is directly monitored by the select signal from the microcomputer block 30. The analog audio signal is supplied to an external component (2-channel to 6-channel multi-channel stereo device) (not shown).
[0082]
In the above apparatus, the flow of the video signal will be briefly described as follows.
[0083]
First, the input AV signal is digitally converted by the ADC 52. The video signal is input to the V encoder, the audio signal is input to the A encoder, and character data such as text broadcast is input to the SP encoder. The video signal is subjected to MPEG compression, the audio signal is subjected to AC3 compression or MPEG audio compression, and the character data is subjected to run length compression.
[0084]
The compressed data from each encoder is packetized so as to be 2048 bytes when packed, and input to the formatter 56. In the formatter 56, each packet is packed, further multiplexed, and sent to the data processor 36.
[0085]
Here, the formatter 56 creates an RDI pack based on the information from the aspect information detection unit 43 and arranges it at the head of the video object unit (VOBU). The data processor 36 forms an ECC block every 16 packs, adds error correction data, and records the output on the optical disc 1001 via the disc drive 35. Here, since the disk drive 35 is in a seek state or a track jump or the like, in the busy state, the disk drive 35 is put in the temporary storage unit 37 (for example, the HDD buffer unit) and stored in the DVD-RAM drive unit (disk drive 35). You will wait until you are ready.
[0086]
Further, the formatter 56 creates each segmentation information during recording, and periodically sends it to the MPU of the microcomputer block 30 (information at the time of GOP head interruption, etc.).
[0087]
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.
[0088]
At the same time, information from the aspect information detection unit 43 is sent to the MPU at the start of recording, and the MPU creates VOB stream information (STI). Here, the STI stores resolution data, aspect data, and the like, and at the time of reproduction, each decoder unit is initialized based on this information.
[0089]
In the recording / playback DVD, one video file is recorded on one disc.
[0090]
Here, in a real-time recording / playback apparatus using a DVD, a point to be noted is that when data is accessed, it continues at least in order to continue playback without interruption during the access (seek). Sectors are needed. This unit is called CDA (Contiguous Data Area).
[0091]
This CDA is advantageously in units of ECC blocks. Therefore, the CDA size is a multiple of 16 sectors, and the file system performs recording in units of CDA. However, in this case, if there is not enough free space of CDA size in the disk, a short sector used by another file is allowed to enter the CDA. Thereby, recording can be performed in units of CDA.
[0092]
FIG. 6 also shows the movie AV file information table (M_AVFIT) in the video manager (VMG) in a hierarchical manner. The information in this table includes the number of recorded VOBs (programs), the number of audio and sub-picture streams corresponding to each VOB, and the attributes of each VOB (television system, aspect ratio, etc.) stream information (M_VOB_STI) It is recorded as. Further, as M_AVFI, information indicating whether the VOB is reproducible or temporarily erased and date / time information (recording time) when the VOB is recorded are described as general information. Further, as individual information, a search pointer for each VOB and system clock information as information (SMLI) for continuously reproducing a plurality of VOBs are described. Furthermore, VOBU time map information (TMAPI) in the VOB is described. The time map information can be used when special reproduction or the like is performed.
[0093]
The system of the present invention is provided with an immediate recording function when a DVD-RAM is loaded in the apparatus. The operation will be described below with reference to FIG.
[0094]
When the DVD-RAM is loaded, a disk detection signal is supplied to the microcomputer block 30 from the disk sensor. When the initialized DVD-RAM is loaded, several tens of seconds are required until the recording preparation for the DVD-RAM is completed. The breakdown is that the time until the rotational speed of the DVD-RAM reaches a desired speed, the time for reading management information from the DVD-RAM that has reached the desired rotational speed, and the read management information are stored in the temporary storage unit 37. It's time. When a non-initialized DVD-RAM is loaded, a time (several minutes) for initializing the DVD-RAM is required in addition to the time until the above-mentioned recording preparation is completed.
[0095]
For example, when a DVD-RAM is loaded and recording of data to the loaded DVD-RAM is instructed immediately, or immediately after the recording / reproducing apparatus is turned on, the DVD-RAM is immediately Data cannot be recorded in the RAM. However, this is inconvenient. Therefore, in the present invention, when the recording preparation for the DVD-RAM is not completed, the HDD 2001 is regarded as a virtual DVD-RAM, and data is stored in the virtual DVD-RAM until the recording preparation for the DVD-RAM is completed. Record.
[0096]
First, processing for the DVD-RAM side in FIG. 7 will be described. Here, a description will be given assuming that the DVD-RAM has been initialized. When disk insertion is detected, the DVD-RAM file system is fetched. It is determined whether or not there is a free space, and if not, a warning display indicating that there is no recording space is displayed. If there is a free area, the write address is determined.
[0097]
Next, the video manager information (VMGI) is read from the DVD-RAM into the work RAM. If there is no video manager information (VMGI), it is generated internally and a VMGI table is constructed. This process corresponds to steps A1, A2, A3, A4, A5, and A6 performed by the microcomputer block 30 as a center. That is, a file system check, a free space check, and the like are performed with the DVD-RAM loaded in the recording / playback apparatus.
[0098]
Next, initial setting of recording is performed in the encoder unit 50, and recording is set to start (step A7). That is, when the microcomputer block 30 confirms that recording is possible, recording initial setting is performed. In addition, STC reset, drive start address setting, write command setting, formatter initial setting, alignment processing setting, cell, VOBU, program (PG), program chain (PGC) partition preparation settings Is done.
[0099]
That is, at the start of recording, a recording start command is set to the encoder unit 50, and the segmentation information in the formatter 56 is registered as VOBU. Thus, when recording starts, the encoder unit 50 compresses the frames of the input video signal in units of GOPs, further packs the GOPs, collects the packs, and collects them in units of VOBUs. The aspect ratio information is inserted into the GOP sequence header (see FIG. 3B). In addition, an RDI pack (see FIGS. 3B and 4) is arranged as the leading pack of VOBU. At this time, as described with reference to FIG. 3A, audio packs, sub-picture packs, and the like are also collected (step A8).
[0100]
When 1 CDA of encoded data is accumulated, each drive unit is set to record in a free space of the DVD-RAM, and the link information of the sector to be recorded is stored in the work RAM (A15, A16).
[0101]
Between steps A8 and A15, the following check is performed. When the segmentation information is accumulated in the formatter 56, an interruption process for capturing the segmentation information is performed (steps A9 and A10). The segmentation information is temporarily taken into the work RAM as VOBU management information. Further, it is checked whether or not a recording end key has been input, or whether or not a recording end command (command in the case of scheduled recording end) has been input (step A11). Furthermore, a remaining capacity calculation process and a process for determining whether the remaining capacity has fallen below a certain value are also performed (steps A12 and A13) .When the remaining capacity falls below a certain value, the bit rate is extended to extend the recording period. And the corresponding processing when the remaining capacity is low is performed (step A14).
[0102]
In step A17, it is determined whether there is a recordable capacity. If there is a capacity, the process returns to step A9. If not, the segmentation information is taken into the microcomputer block from the formatter and the formatter is initialized.
[0103]
Next, it is determined whether or not the temporarily recorded data exists in the hard disk or the buffer RAM in place thereof (step A19). If it exists, the hard disk or buffer RAM data is recorded on the DVD-RAM, and the hard disk or buffer RAM data is cleared (step A20).
[0104]
Next, a recording end process is performed (step A21). As the recording end processing, the file system is updated (when data is transferred and recorded from the hard disk to the DVD-RAM, link information is created so that the data comes first on the DVD-RAM), and the video manager (VMG ) As updated management information (PGCI setting, segmentation information, etc.).
[0105]
With reference to FIG. 9, the processing in the case where there is an interruption in step A9 in FIG. 7 will be briefly described.
[0106]
When the interrupt information is detected, the cause of the interrupt is checked, one pack of data is transferred to the data processor 36, and the count up of the number of recording packs is started. The interrupt flag is set every time one piece of segmentation information is fetched for the packs being processed one after another by the formatter 56. This process is performed until the interrupt is released. When the interruption is canceled, it is determined whether there is one CDA from the number of recording packs via steps A11, A12, A13, and A14. At the same time, the interrupt flag is deleted. Thereby, even when the interrupt process is executed, the segmentation information for creating the cell, VOBU, PG, PGC, etc. is not lost.
[0107]
FIG. 10 is a flowchart showing the operation when temporary recording is performed on the hard disk until the DVD-RAM is loaded into the apparatus as described above and the recording preparation is completed.
[0108]
First, initial recording is set in the encoder unit 50, and recording is set to start (step B1). That is, when the microcomputer block 30 confirms that recording is possible, recording initial setting is performed. In addition, STC reset, drive start address setting, write command setting, formatter initial setting, alignment processing setting, cell, VOBU, program (PG), program chain (PGC) partition preparation settings Is done.
[0109]
That is, at the start of recording, a recording start command is set to the encoder unit 50, and the segmentation information in the formatter 56 is registered as VOBU. Thus, when recording starts, the encoder unit 50 compresses the frames of the input video signal in units of GOPs, further packs the GOPs, collects the packs, and collects them in units of VOBUs. The aspect ratio information is inserted into the GOP sequence header (see FIG. 3B). In addition, an RDI pack (see FIGS. 3B and 4) is arranged as the leading pack of VOBU. At this time, as described with reference to FIG. 3A, audio packs, sub-picture packs, and the like are also collected (step B2).
[0110]
When the segmentation information is accumulated in the formatter 56, an interruption process for capturing the segmentation information is performed (steps B3 and B4). The segmentation information is temporarily taken into the work RAM as VOBU management information.
[0111]
When the encoded data is stored for 1 CDA, it is set to record in the free area of the HDD 2001, and the link information of the sector to be recorded is stored in the work RAM (steps B5 and B6).
[0112]
Thereafter, when the recording preparation of the DVD-RAM is completed, the writing to the HDD 2001 is stopped (steps B7 and B8).
[0113]
The following summarizes the immediate recording function.
[0114]
As described above, immediately after the DVD-RAM is loaded or immediately after the recording / reproducing apparatus is turned on, the recording preparation for the DVD-RAM is not completed, and therefore data cannot be recorded on the DVD-RAM. . Immediately after loading the disk, disk check processing, file system reading, and VMG reading are performed. In the recording / reproducing apparatus of the present invention, assuming that the HDD 2001 is a virtual DVD-RAM, data is recorded on the DVD-RAM as soon as the disk is loaded or immediately after the recording / reproducing apparatus is turned on. The recording operation is controlled.
[0115]
Immediately after loading the disk, a disk check process is performed as described above. The type of the loaded disc is determined by this check. If the loaded disc is a DVD-RAM and has not been formatted, the formatting process is executed. Usually, the DVD-RAM to be sold is formatted, but if the file is broken, it needs to be reformatted.
[0116]
Following the disk check process, the file system is read and expanded in the work RAM. When VMG is detected from the file system, VMG is expanded in the work RAM as it is. If the VMG is not detected, the VMG is constructed in the work RAM.
[0117]
Video / audio data to be recorded is supplied from an A / V input unit 42 as input means. The video / audio data supplied from the input unit 42 is finally recorded on the optical disc 1001 (DVD-RAM) by the disc drive 35 via the encoder unit 50. Alternatively, the video / audio data supplied from the input unit 42 is finally recorded in the HDD 2001 via the encoder unit 50.
[0118]
If recording to the optical disc 1001 is instructed in a state where recording preparation for the optical disc 1001 is not completed (recording instruction to the disc), the first recording control of the microcomputer block 30 causes the HDD 2001 to replace the optical disc 1001 instead of the optical disc 1001. The target video / audio data is recorded. At this time, the separation information is stored in the work RAM.
[0119]
If there is no more free space in the HDD 2001 before the recording preparation for the optical disc 1001 is completed, a message to that effect is displayed and the subsequent recording ends. In such a case, the target video / audio data is lost.
[0120]
When the target video / audio data is recorded on the HDD 2001 by the first recording control described above, when the recording preparation for the optical disc 1001 is completed, the second recording control of the microcomputer block 30 causes the optical disc 1001 to be recorded. The target video / audio data is recorded. At this time, the write start address is determined by the file system. Here, the target video / audio data to be recorded is a continuation of the target video / audio data recorded by the first recording control. Strictly speaking, since data is recorded in units of CDA, data is recorded on the optical disc 1001 from a new CDA unit after preparation for recording on the optical disc 1001 is completed.
[0121]
After the recording of the target video / audio data is completed by the second recording control described above (after the recording of all the target video / audio data is completed), the first recording control is performed by the third recording control of the microcomputer block 30. Thus, the target video / audio data recorded in the HDD 2001 is read, and the read target video / audio data is recorded on the optical disc 1001.
[0122]
Further, the fourth recording control of the microcomputer block 30 establishes a link indicating the link of the target video / audio data recorded on the optical disc 1001 twice by the second recording control and the third recording control. That is, the file system is configured so that the target video / audio data recorded on the optical disc 1001 by the third recording control is reproduced before the target video / audio data recorded on the optical disc 1001 by the second recording control. It is constructed on the optical disc 1001. Alternatively, program chain information (PGCI) for reproducing the target video / audio data recorded on the optical disc 1001 by the third recording control earlier than the target video / audio data recorded on the optical disc 1001 by the second recording control. Are recorded on the optical disc 1001. The data recording unit for the optical disc 1001 and the HDD 2001 is a CDA unit.
[0123]
In the above description, a case has been described in which the video / audio data that has been recorded on the HDD 2001 is moved to the optical disc 1001 after all the target video / audio data has been recorded, but the present invention is not limited to this. . For example, when the recording preparation of the optical disc 1001 is completed, the video / audio data recorded in the HDD 2001 as a substitute may be moved to the optical disc 1001, and then the subsequent video / audio data may be recorded on the optical disc 1001. In this case, since the audio / video data is recorded on the optical disc 1001 in the order of reproduction, no link is required.
[0124]
Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. In addition, the embodiments may be appropriately combined as much as possible, and in that case, the combined effect can be obtained. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the column of the effect of the invention Can be obtained as an invention.
[0125]
【The invention's effect】
According to the present invention, the following information immediate recording apparatus and information immediate recording method can be provided.
[0126]
(1) An information immediate recording apparatus that can take advantage of both the hard disk and the DVD and can virtually record information on the DVD virtually even when the recording preparation for the DVD is not completed.
[0127]
(2) An information immediate recording method that makes it possible to virtually record information on a DVD even when the recording preparation for the DVD is not completed, taking advantage of both the hard disk and the DVD.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a schematic configuration of a recording / reproducing apparatus according to an example of the present invention.
FIG. 2 is a diagram showing a part of a directory structure of a DVD system.
FIG. 3 shows VR_MOVIE. It is a figure which shows the file structure of VRO, and the format of the video data based on the MPEG2 system by the relationship with V pack.
FIG. 4 is a diagram showing details of RID data.
FIG. 5 is a diagram illustrating a hierarchical structure of a video manager (VMG) and details a system for managing a data reproduction order.
FIG. 6 is a diagram hierarchically showing a movie AV file information table (M_AVFIT) in the video manager (VMG).
FIG. 7 is a first part of a flowchart showing a recording process 1 for a DVD-RAM;
FIG. 8 is the latter part of the flowchart showing the recording process 2 for the DVD-RAM;
FIG. 9 is a diagram showing interrupt processing for a DVD-RAM.
FIG. 10 is a flowchart showing a recording process for an HDD.
[Explanation of symbols]
30 ... Microcomputer block
35 ... Disk drive
36 ... Data processor
37 ... Temporary storage
50. Encoder unit
60: Decoder unit
1001. Optical disk (DVD-RAM)
2001. Hard disk drive (HDD)

Claims (6)

  1. Input means for inputting video and audio data provided in real time;
    A built-in second information recording medium;
    First recording / reproducing means for recording the video / audio data input by the input means on a detachable first information recording medium or reproducing the video / audio data recorded on the first information recording medium. When,
    A second recording / reproducing means for recording the video / audio data input by the input means on the second information recording medium or reproducing the video / audio data recorded on the second information recording medium;
    If recording to the first information recording medium is instructed in a state where preparation for recording to the first information recording medium is not completed, the second recording / reproducing is performed instead of the first information recording medium. First recording control means for recording desired video / audio data input from the input means to the second information recording medium by means;
    When the recording preparation for the first information recording medium is completed when the recording control is performed by the first recording control means, the input to the first information recording medium by the first recording / reproducing means is performed. Second recording control means for recording target video / audio data input from the means;
    After the recording of the target video / audio data is completed by the recording control of the second recording control means, the target video / audio data recorded on the second information recording medium is read by the first recording control means. A third recording control unit for recording the read target video / audio data on the first information recording medium by the first recording / reproducing unit;
    By the recording control of the second recording control means and the recording control of the third recording control means, link data indicating a link of the target video / audio data recorded on the first information recording medium is obtained. Fourth recording control means for recording on the first information recording medium by the recording / reproducing means,
    An information immediate recording apparatus comprising:
  2.   The fourth recording control means uses the recording control of the third recording control means rather than the target video / audio data recorded on the first information recording medium by the recording control of the second recording control means. The file system for reproducing the target video / audio data recorded on the first information recording medium in advance is constructed on the first information recording medium by the first recording / reproducing means. Item 2. The information immediate recording apparatus according to Item 1.
  3.   The fourth recording control means uses the recording control of the third recording control means rather than the target video / audio data recorded on the first information recording medium by the recording control of the second recording control means. Program chain information for first reproducing target video / audio data recorded on the first information recording medium is constructed on the first information recording medium by the first recording / reproducing means. The information immediate recording apparatus according to claim 1.
  4.   2. The information immediate recording apparatus according to claim 1, wherein the first and second recording / reproducing units record video / audio data in units of CDA.
  5.   When recording on the first information recording medium is instructed in a state where recording preparation for the detachable first information recording medium is not completed, a built-in first information recording medium is used instead of the first information recording medium. A first step of recording target video / audio data on the two information recording media;
      When the recording in the first step is continued and the recording preparation for the first information recording medium is completed, the second video recording is performed on the first information recording medium. Process,
      After the recording of the target video / audio data is completed by the recording in the second step, the first A third step of reading the target video / audio data recorded on the second information recording medium by the step and recording the read target video / audio data on the first information recording medium;
      By the recording in the second step and the recording in the third step, link data indicating a link of the target video / audio data recorded in the first information recording medium is recorded in the first information recording medium. A fourth step of
      An information immediate recording method characterized by comprising:
  6.   2. The information immediate recording apparatus according to claim 1, wherein the state where the recording preparation is not completed is immediately after power is turned on.
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CN1278214C (en) 2003-08-12 2006-10-04 株式会社日立制作所 Recording/reproducing apparatus for video/audio signals
KR20050080869A (en) * 2004-02-11 2005-08-18 엘지전자 주식회사 Method for managing and reproducing a file information of high density optical disc
JP2005267669A (en) * 2004-03-16 2005-09-29 Sony Corp Information processing device and method, program recording medium, and program
JP4367371B2 (en) 2005-04-22 2009-11-18 ソニー株式会社 Information processing apparatus and method, and program
JP4533249B2 (en) * 2005-06-03 2010-09-01 株式会社プランネット・アソシエイツ Digital audio / video information recording device
BRPI0617275A2 (en) 2005-10-11 2011-07-19 Thomson Licensing dvd replication system and method
JP5193999B2 (en) * 2006-04-12 2013-05-08 トムソン ライセンシングThomson Licensing VDoD and electronic DVD rental / purchase / write apparatus and method
JP4631811B2 (en) * 2006-06-12 2011-02-23 株式会社日立製作所 Imaging device
JP2008250989A (en) * 2007-03-08 2008-10-16 Seiko Epson Corp Information processor and program
JP2010074248A (en) * 2008-09-16 2010-04-02 Sharp Corp Video recorder
WO2010113825A1 (en) * 2009-03-31 2010-10-07 シャープ株式会社 Recording apparatus
JP2010192096A (en) * 2010-02-02 2010-09-02 Plannet Associate Co Ltd Device for recording digital sound image information

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