JPH11250584A - Disk type recording medium information recording device and method for recording information on disk type recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform recording and/or reproducing without causing failure in data of which capacity of one file is large and which is continuous time-wise. SOLUTION: This device is provided with a storage means 7 which is formed in a disk type and provided with an animation data region in which animation data and sound data corresponding to animation are stored and an audio data region which is arranged at an more inner peripheral side than the animation data region and in which audio data is stored and a recording means 9 recording sound data and audio data corresponding to the animation data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc-shaped recording medium on which digital data such as moving picture data and audio data can be recorded and reproduced, and an information recording apparatus and method for recording digital data on the disc-shaped recording medium.

[0002]

2. Description of the Related Art Hitherto, data stored in a digital information recording apparatus has been controlled by a file management function of an OS (operating system) of a host computer. That is, as an example of a recording medium in a digital information recording apparatus, a recording area or a free area of data on a disk-shaped recording medium (hereinafter, referred to as a disc) is not related to the recording apparatus itself, and is transmitted from the host computer together with a command. It was recorded in the specified area.

[0003] For example, MS widely known among OSs
-DOS (registered trademark of Microsoft Corporation) and UNIX
In, when the disk is initialized, the recording area
The data block is divided into data blocks of a fixed size such as 12 bytes or 1024 bytes, and recording and reproduction are performed in units of the data blocks. Such a recording / reproducing method adopted in MS-DOS and UNIX is called a fixed size division method.

[0004] The fixed size division method is excellent in the use efficiency of a recording area in a disc and the flexibility of expanding a file. In the case of such a fixed size division method, a number called a unique sector ID is recorded at the head of each sector at the time of disk initialization. This sector ID indicates a physical position on the disk. The sector ID includes, for example, an 8-bit sector number, a 16-bit track number, an 8-bit surface number, and a 16-bit error check code (CRC).

[0005] The host computer manages the sector ID as a series of logical block numbers (Logical Block Address, hereinafter referred to as LBA), and the position on the disk to be recorded or reproduced at the time of recording or reproducing data is defined as LBA. get.

In recent years, there is an information recording apparatus having a data format without a sector ID. In this information recording apparatus, recording or reproduction is performed by managing sector numbers in a hardware manner, the concept of the sector ID is used, and a block management method in which a unit at the time of recording or reproduction is fixed is adopted. doing.

Next, FIG. 16 shows a configuration example of an information recording / reproducing apparatus 100 using a hard disk drive (hereinafter referred to as an HDD) having a built-in magnetic disk. In the information recording / reproducing apparatus 100, MS-DOS or UNIX is adopted as the OS as described above.

The information recording / reproducing apparatus 10 shown in FIG.
0, a hard disk D which is a magnetic disk, a magnetic head (not shown) for recording and reproducing data on the hard disk D, and a voice coil for moving the magnetic head to a predetermined track position on the hard disk D A motor (hereinafter, referred to as VCM) 102, a servo circuit 103 for generating a drive signal for driving the VCM 102, a buffer 104 for temporarily storing data supplied from the outside and data to be output to the outside, and recording on the hard disk D An R / W channel circuit 105 for generating a recording signal to be reproduced and reproducing data from data read from the hard disk D;
A microprocessor unit (hereinafter, referred to as an MPU) 106 for controlling these units, and the MPU 10
6 controls recording / reproducing to / from the buffer 104 based on the control signal from the R / W channel circuit 105
And a hard disk controller (hereinafter, referred to as HDC) 107 for exchanging data with the HDD.

Here, the data recorded on the hard disk D is obtained by adding parity of an error correction code (hereinafter, referred to as ECC) to user data. By adding the parity of the error correction code in this manner, in the information recording / reproducing apparatus 100, when an ECC error occurs in a sector during reproduction, the reproduction processing is performed again after the hard disk D rotates once. I do. This is called a retry process. In a normal HDD, several retries are performed as internal processing that cannot be understood at the command level. This is called hidden retry processing. At this time, a rotation wait time of the hard disk D occurs because the sector to be reproduced is accessed again.

If the data cannot be reproduced even after performing the retry processing, it is regarded as a defective sector, and when the next recording is performed, processing for replacing the defective sector with a sector prepared in another spare area is performed. This is called exchange sector processing. By this exchange sector processing, a seek for moving the magnetic head to the replacement area, a rotation wait after the seek, and a seek and rotation wait for returning to the original area for recording and reproducing the succeeding sector occur. These are not preferable in performing continuous transfer of moving image audio data.

In such an HDD 101, the SC
It is connected to the host computer via a bus such as SI or IDE.

The logical format program 1 as software other than the OS 130 is stored on the host computer.
31, the device driver 132, and the BIOS 133 are installed.

[0013] The BIOS 133 stores the I
This is a program that summarizes hardware-dependent parts that perform the / O service.

The device driver 132 is a program for making a hard disk accessible as a block device, and associates a file with a logical block on the hard disk D.

The logical format program 131 is a program for writing necessary initialization information (sector ID and file management table) when the hard disk D is initialized.

As described above, usually, file management is performed by the host computer, and the HDD 101 converts the LBA given from the host computer into a sector ID indicating a physical position on the hard disk D, and Recording / reproduction to / from the position is performed.

[0017]

The data recording / reproducing apparatus 100 described above has the following problems when recording / reproducing data such as moving images and audio.

First, in a host computer which should perform file management, file access processing is interrupted by many interrupt processing. Therefore, there is a problem that the continuity of the data is interrupted when transferring a large amount of data such as a moving image and a sound, and the moving image and the sound to be recorded and reproduced are broken.

In general, data such as moving pictures and sounds have a very large capacity, with one file being continuous in time. For example, even a minimum editing unit (GOP) of data compressed by the MPEG system is about 1 Mbit on average.
With a small drive, the capacity is as large as several tracks. There is a problem that a file system developed for ordinary computer data becomes extremely redundant for such a large-capacity file.

Further, since the current HDD is developed for computers, the main focus is on recording and reproducing relatively short discrete data quickly and reliably, and is not suitable for real-time processing. Further, in the current HDD, as described above, since the retry process and the exchange sector process occur stochastically, there is a problem that, in the case of a small drive, the transferred moving image, audio data, and the like are broken down. .

Accordingly, the present invention has been proposed in view of the above-described problems, and has a large file size and does not cause a failure in temporally continuous data. It is an object of the present invention to provide a disk-shaped recording medium in which a system is stored.

Another object of the present invention is to provide an information recording apparatus and method for recording data on a disk-shaped recording medium without causing a failure in data that has a large capacity and continuous data in time. And

[0023]

A disk-shaped recording medium according to the present invention for solving the above-mentioned problems comprises: a moving image data area in which moving image data and sound data corresponding to the moving image are stored; And an audio data area arranged on the inner peripheral side of the area to store audio data.

Such a disc-shaped recording medium has an audio data area on the inner circumference side and a moving picture data area on the outer circumference side of the audio data area.

The information recording apparatus according to the present invention may further comprise a moving image data area in which moving image data and sound data corresponding to the moving image are stored, and an audio data arranged on an inner side of the moving image data area. And a recording means for recording moving image data, audio data corresponding to the moving image data, and audio data on the disk-shaped recording medium. It is assumed that.

According to such an information recording apparatus, the recording means records the moving image data and the acoustic data corresponding to the moving image data in the moving image data area arranged on the outer peripheral side of the disc-shaped recording medium, The audio data is recorded in an audio data area arranged on the inner peripheral side of the storage means.

Further, according to the information recording method of the present invention, an audio data area is provided on the inner peripheral side of a moving image data area in which moving image data and sound data corresponding to the moving image are recorded on a disc-shaped recording medium. It is characterized by recording data.

According to such an information recording method, moving image data and acoustic data are recorded in the moving image data area arranged on the outer peripheral side of the disc-shaped recording medium, and are recorded in the audio data area arranged on the inner peripheral side. Record audio data.

[0029]

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

FIG. 1 is a configuration diagram showing an example of the information recording / reproducing apparatus 1 according to the present embodiment. The information recording / reproducing apparatus 1 shown in FIG.
ts Group) antenna 2 for receiving digital data
And NTSC (National Television System Com
mittee) antenna 3 for receiving an analog signal;
A signal processing circuit 4 for performing signal processing on digital data and analog data received by the antennas 2 and 3; a host bus 5 which is a common bus for transmitting information; and a signal processing circuit 4 for transmitting information between the signal processing circuit 4 and the host bus 5. An interface buffer 6 for mediating transmission, a hard disk drive (HDD) 7 having a recording medium on which information is recorded, a host bus 5 and an H
The so-called ATA that mediates the transmission of information to and from DD7
(AT Attachment) adapter 8.

The host bus 5 is connected to the information recording / reproducing device 1
Is a transmission line of a parallel line in which information is transmitted between the respective parts.

The interface buffer 6 mediates transmission of an audio and / or visual digital data stream (hereinafter, simply referred to as AV data) between the signal processing circuit 4 and the host bus 5. For example, the interface buffer 6 converts the transfer speed of the AV data and adjusts the transfer timing. The interface buffer 6 has a two-bank RAM inside. The two-bank RAM is composed of two RAMs which are alternately switched to adjust the transfer of information.

The HDD 7 is a fixed disk device for recording input AV data. ATA (AT Attachmen
t) The adapter 5 intervenes between the host bus 5 and the HDD 7 and converts the AV data into the parallel data of the host bus 5 and the HD.
It converts between data in the data format of D7.

The HDD 7 includes, for example, a magnetic disk as a recording medium for recording AV data therein. AV data multiplexed by the multiplexer 19 is recorded on this magnetic disk according to a file system described later. The HDD 7 is provided with a magnetic head when a magnetic disk is mounted as a recording medium, for example, and records temporally continuous AV data on the magnetic disk.

When recording the continuous AV data on the magnetic disk as described above, the HDD 7 follows the track formed on the magnetic disk by scanning the magnetic head from the outer peripheral side to the inner peripheral side of the magnetic disk. Let it. After recording data from the outermost periphery to the innermost periphery, the HDD 7 moves the magnetic head to the outermost periphery again to record AV data. At this time, a general HD
In D, the time required for the magnetic head to move from the innermost circumference to the outermost circumference, and a logical block address (hereinafter referred to as a logical block address) at which recording starts
LBA: Logical Block Address. The recording from the outermost periphery is performed again through the rotation waiting time up to). However, in the HDD 7, the rotation waiting time until the recording start LBA is set to 0 in order to temporally guarantee the continuity of the AV data.

That is, in the magnetic head in the HDD 7, the rotation start time is set to 0 by calculating the position of the recording start LBA arranged on the outermost periphery. That is, r is the rotation time of one rotation of the magnetic disk, t is the seek time when the magnetic head moves from the innermost circumference to the outermost circumference, the skew angle θ is the angle at which the magnetic disk rotates during the seek time t, and the sector number is Is n and the number of sectors around one is n ₀ , θ> t / r × 360 ゜ (1) n = (t / r × n ₀ ) −α (2) Here, α in Equation 2 is the CPU in the HDD 7.
This is the number of sectors rotated during the time required from when the command from 9 is input to when the HDD 7 interprets the command and sets it in each circuit in the HDD 7. That is, Equation 1
According to the above, for example, when the seek time t is about 5 ms and the one rotation time r is about 10 ms, the skew angle θ is about 1
80 °, which means that the recording start LBA should be located at a position shifted by about 180 ° from the recording end LBA. Further, the sector number corresponding to the recording start LBA is calculated by substituting a predetermined numerical value into Expression 2 above. Therefore, according to the HDD 7, continuous data can be recorded even when recording is performed continuously in time.

The information recording / reproducing apparatus 1 has a central processing unit (CPU) 9 for centrally processing information, a RAM 10 as a volatile memory, and an RO as a non-volatile memory.
M11.

The CPU 9 is connected to the host bus 5 and performs software control of a series of operations of the information recording method in the information recording / reproducing apparatus 1, such as data transfer and control of the HDD 7. Software for activating this series of operations is recorded, for example, in the ROM 11, and is read out and executed as needed. Also, this CPU 9
(Reduced Instruction Set Computer), which is a reduced instruction set computer in which basic instructions are simplified and the number of instructions is reduced to improve the processing speed.

The CPU 9 is connected to an operation input unit such as a keyboard (not shown), and receives an operation input signal from a user, for example. This CPU 9
Is supplied with, for example, an operation input signal for instructing recording and reproduction of AV data, and controls each unit of the information recording / reproducing apparatus 1 in accordance with the operation input signal.

The ROM 11 stores a file system which is a control program described later. This RO
The file system stored in M11 is read by the CPU 9. The CPU 9 controls reading and writing of the HDD 7 by reading the file system.

The RAM 10 is connected to the host bus 5,
This is a volatile memory in which data is temporarily recorded. R
The OM 11 is a nonvolatile memory connected to the host bus 5 and storing predetermined data and software.

The RAM 10 stores a route, which will be described later, stored in the HDD 7 at the time of startup and recording / reproduction, and management information indicating the TOC. This management information is updated at any time by the CPU 9 at the time of startup and at the time of recording and reproduction.

The signal processing circuit 4 includes a tuner 15 for inputting a signal via the antenna 3 for receiving an analog video signal and an audio signal, and a tuner 1.
A for converting the video signal input in step 5 into digital data
/ D conversion circuit 16 and NTSC decoder 17 to which a digital video signal is input from A / D conversion circuit 16
And an MPEG2 encoder 18 for inputting a video signal converted to a baseband signal by an NTSC decoder 17
And a multiplexer 19 to which digital MPEG AV data is input.

The signal processing circuit 4 also receives an A / D conversion circuit 20 to which the audio signal input to the tuner 15 is input, and an audio signal which is digitalized by the A / D conversion circuit 20. An MPEG1 encoder 21 is provided.

The tuner 15 receives, for example, an NTSC signal received by the antenna 3. The tuner 15 receives a video signal and an audio signal received by the antenna 3 and performs detection. The tuner 15 converts the detected video signal into an A / D signal.
The signal is output to the conversion circuit 16 and the audio signal is output to the A / D conversion circuit 20.

The A / D conversion circuit 16 performs A / D conversion processing on the video signal from the video input terminal or the tuner 15 to obtain video data. And the A / D conversion circuit 1
6 outputs NTSC video data to the NTSC decoder 17, for example.

The NTSC decoder 17 receives NTSC video data from the A / D conversion circuit 16. The NTSC decoder 17 performs a decompression process on the input video data to generate a baseband signal.
Then, the NTSC decoder 17 outputs a baseband signal to the MPEG2 encoder 18 via the terminal 1 of the switch 22.

[0048] The MPEG2 encoder 18 performs a compression process on the baseband signal from the NTSC decoder 17.
At this time, the MPEG2 encoder performs compression processing on the input baseband signal so as to be digital data of the MPEG2 system. This MPEG2 encoder 1
As described above, CP 8 is set so that the input baseband signal is an integral multiple of the logical sector of the recording medium.
The encoding process is performed at the compression rate specified by U9. That is, the MPEG2 encoder 18 outputs the input GOP
(Group Of Picture) and / or compression encoding is performed so that the maximum data value of the I frame becomes an integral multiple of the logical sector of the recording medium.

Also, the MPEG2 encoder 18
A baseband signal is input from the MPEG2 decoder 24 via the terminal 2 of the switch 22 and the terminal 2 of the switch 26. The MPEG2 encoder 18 encodes the baseband signal from the MPEG2 decoder 24 at a predetermined compression rate.

On the other hand, the tuner 15 outputs an audio signal among the signals input from the antenna 3 to the A / D conversion circuit 20. The A / D conversion circuit 20 performs A / D conversion processing on the input audio signal to generate audio data. Then, the A / D conversion circuit 20 outputs the audio data to the MPEG1 encoder 21.

The MPEG1 encoder 21 performs compression processing on the audio data from the A / D conversion circuit 20 according to the MPEG1 system, and outputs the result to the multiplexer 19.

The multiplexer 19 multiplexes the video data from the MPEG2 encoder 18 and the audio data from the MPEG1 encoder 21. If the video data is V and the audio data is A, the multiplexer 19 is, for example, a GOP of an MPEG signal.
.. Are compressed on the time axis with VAVAVA... To generate AV data. The multiplexer 19 outputs the AV data obtained by the multiplexing process to the interface buffer 6.

The multiplexer 19 receives the AV data recorded on the recording medium in the HDD 7 from the interface buffer 6. This multiplexer 1
9 is the AV input from the interface buffer 6
Divide the data into video data and audio data. The multiplexer 19 outputs the divided video data to the multiplexer 3 via the terminal 2 of the switch 34.
2 and to the MPEG2 decoder 24 via the terminal 1 of the switch 23. The multiplexer 32 outputs the divided audio data to the multiplexer 32 via the delay circuit 33 and to the MPEG1 decoder 25.

The signal processing circuit 4 includes an antenna 2 for receiving digital data of the MPEG system and an STB
(Set-top box) 30, digital I / F circuit 31, multiplexer 32, and delay circuit 33.

The antenna 2 is, for example, MP
EG type digital data is input. This antenna 2
Uses the received digital data as an RF signal in STB3
Output to 0.

The STB 30 receives and detects digital data from the antenna 2 at the front end. The STB 30 descrambles, for example, the scrambled digital data and outputs the descrambled digital data to the digital I / F circuit 31.

The STB 30 has a digital I / F
Digital data is input from the circuit 31. This STB
30 has a built-in MPEG decoder. This S
The TB 30 uses the MPEG decoder to generate a digital I / O signal.
The digital data from the / F circuit 31 is subjected to a decoding process, and, for example, compressed video data and audio data are decompressed and converted into a video signal and an audio signal.

The digital I / F circuit 31 has a physical layer / link layer processing circuit, performs signal processing such as conversion processing on digital data from the STB 30, and outputs the digital data to the multiplexer 32.

Digital data obtained by multiplexing video data and audio data from the multiplexer 32 is input to the digital I / F circuit 31. This digital I / F circuit 31 converts this digital data into STB
Output to 30.

The multiplexer 32 performs a division process for dividing the digital data from the digital I / F circuit 31 into video data and audio data. The multiplexer 32 converts the video data obtained by the division processing into an MPEG signal via a terminal 1 of a switch 34 and a terminal 2 of a switch 23.
2 decoder 24. This multiplexer 32
Outputs audio data to the delay circuit 33.

The multiplexer 32 receives video data from the multiplexer 19 via a switch 34 and audio data via a delay circuit 33. Then, the multiplexer 32 multiplexes the input video data and audio data and outputs the multiplexed data to the digital I / F circuit 31.

The delay circuit 33 includes a multiplexer 32
Perform delay adjustment on audio data from The delay circuit 33 performs a delay process so as to adjust the time difference between the input audio data and the video data, and outputs the result to the multiplexer 19.

The delay circuit 33 receives only the audio data among the video data and the audio data divided by the multiplexer 19. The delay circuit 33 performs a delay adjustment with respect to the video data and outputs audio data to the multiplexer 32.

The signal processing circuit 4 includes an MPEG2 decoder 24 to which video data is input via the terminal 2 of the switch 23, an MPEG1 decoder 25 to which audio data obtained by division by the multiplexer 19 is input,
An NTSC encoder 27 to which video data decoded by the PEG2 decoder 24 is input via the terminal 1 of the switch 26; a D / A conversion circuit 28 to which data encoded by the NTSC encoder 27 is input;
A D / A conversion circuit 29 to which audio data decoded by the decoder 25 is input;

The MPEG2 decoder 24 reads out the AV data recorded on the HDD 7 by the data transfer software of the CPU 9, and reads out the ATA adapter 8, the host bus 5,
Multiplexer 1 via interface buffer 6
The video data obtained by division at 9 is connected to the terminal 1 of the switch 23.
Is entered via This MPEG2 decoder 24
The compressed video data is subjected to decompression processing.
The MPEG2 decoder 24 receives video data from the multiplexer 32 via the terminal 2 of the switch 23. The MPEG2 decoder 24 outputs to the switch 26 video data obtained by subjecting the input video data to a decompression process.

The switch 23 is connected to the terminal 2 when the video data from the multiplexer 32 is input to the MPEG2 decoder 24.
Is input to the MPEG2 decoder 24 so as to be connected to the terminal 1.

The switch 26 is connected to the MPEG2 decoder 24
Are connected to the terminal 2 when outputting video data from the MPEG2 decoder 24 to the switch 22, and are connected to the terminal 1 when outputting video data from the MPEG2 decoder 24 to the NTSC encoder 27.

The NTSC encoder 27 converts the video data decoded by the MPEG2 decoder 24 into a switch 2
6 through the terminal 1. The NTSC encoder 27 performs compression processing on the input video data according to the NTSC system and outputs the video data to a D / A conversion circuit 28.

The D / A conversion circuit 28 performs a D / A conversion process on the video data from the NTSC encoder 27 to generate a video signal. The D / A conversion circuit 28
The video signal is output to the video output terminal.

Audio data obtained by division from the multiplexer 19 is input to the MPEG1 decoder 25. The MPEG1 decoder 25 performs a decompression process on the input audio data. The MPEG1 decoder 25 converts the decompressed audio data into D data.
/ A conversion circuit 29.

The D / A conversion circuit 29 performs a D / A conversion process on the audio data from the MPEG1 decoder 25 to obtain an audio signal. Then, the D / A conversion circuit 29 outputs an audio signal to an audio output terminal.

In such a signal processing circuit 4, the HDD 7
When the MPEG digital data received by the antenna 2 is recorded on the recording medium inside, the digital data is first output to the multiplexer 32 via the STB 30 and the digital I / F circuit 31.

The multiplexer 32 divides the input digital data into video data and audio data. The multiplexer 32 outputs the audio data to the delay circuit 33.

In the multiplexer 32, the video data is transmitted to the MPE through the switches 34 and 23.
Output to the G2 decoder 24. At this time, the switch 34
Is connected to the terminal 1 and the switch 23 is controlled to be connected to the terminal 2.

The MPEG2 decoder 24 decompresses the compressed video data and outputs it to the MPEG2 encoder 18 via the switches 26 and 22.
At this time, the switch 26 is connected to the terminal 2 and the switch 22 is controlled to be connected to the terminal 2.

The MPEG2 encoder 18 performs compression processing on video data input at a predetermined compression rate.
At this time, in the MPEG2 encoder 18, according to the compression rate specified by the CPU 9, the compression rate is such that the compression rate is an integral multiple of the logical sector of the recording medium in the HDD 7.
An OP and / or I picture compression process is performed.

The audio data that has been subjected to the delay processing by the delay circuit 33 is output to the multiplexer 19 under timing control, and the video data from the MPEG2 encoder 18 is output to the multiplexer 19.

The multiplexer 19 multiplexes the input audio data and video data into A and
V data is created and recorded on a recording medium in the HDD 7 via the interface buffer 6, the host bus 5, and the ATA adapter 8. Therefore, in the recording / reproducing apparatus 1, MPEG data is recorded in units of logical sectors of the recording medium.

In the information recording / reproducing apparatus 1, the HD
When recording the NTSC analog signal received by the antenna 3 on the recording medium in D7, first, the NTSC analog signal is output to the tuner 15.

The tuner 15 detects an analog signal from the antenna 3 and converts the video signal into an A / D conversion circuit 16.
Output to the A / D conversion circuit 2
Output to 0. At this time, the A / D conversion circuit 16 may input a video signal from a video input terminal.
The conversion circuit 20 may input an audio signal from an audio input terminal.

The A / D conversion circuit 16 performs A / D conversion processing on the input video signal to convert the input video signal into video data, which is output to the NTSC decoder 17.

The NTSC decoder 17 subjects the video data from the A / D conversion circuit 16 to a decompression process, and outputs the video data to the MPEG2 encoder 18 as a baseband signal. At this time, the switch 22 is controlled to connect to the terminal 1.

The MPEG2 encoder 18 receives a baseband signal via the switch 22. This MP
The EG2 encoder 18 encodes the input baseband signal into MPEG data at a compression rate specified by the CPU 9 to generate MPEG2 video data. In the MPEG2 encoder 18, the GO is performed by an integral multiple of the logical sector of the recording medium in the HDD 7.
Encoding is performed so that P and / or I frames are compressed. Then, in the MPEG2 encoder 18,
The video data is output to the multiplexer 19.

On the other hand, the A / D conversion circuit 20 to which the audio signal is input from the tuner 15 performs A / D conversion processing on the audio signal and outputs the audio signal to the MPEG1 encoder 21 as audio data.

Then, in the MPEG1 encoder 21,
The audio data from the A / D conversion circuit 20 is MPEG
Encoding is performed in one system and output to the multiplexer 19.

In the multiplexer 19, the MPE
The video data input from the G2 encoder 18 and the MP
The audio data input from the EG1 encoder 21 is multiplexed to generate AV data.

The multiplexer 19 transfers the generated AV data to the interface buffer 6, the host bus 5,
The data is recorded on a recording medium in the HDD 7 via the TA adapter 8. Therefore, in the recording / reproducing apparatus 1, MPEG AV data is recorded in logical sector units of the recording medium.

When reproducing the AV data recorded on the recording medium in the HDD 7, the recording / reproducing apparatus 1
The AV stored in the HDD 7 in logical sector units of the recording medium by the data transfer software started by the PU 9
Read data. At this time, the CPU 9 controls the HDD under software control, for example, in various variable-speed playback modes.
7 may be read.

In the recording / reproducing apparatus 1, AV data read from the HDD 7 is input to the multiplexer 19 via the ATA adapter 8, host bus 5, and interface buffer 6. The multiplexer 19 divides the input AV data into video data and audio data.

When reproducing the AV data recorded on the recording medium as digital data, the signal processing circuit 4 outputs the video data from the multiplexer 19 to the multiplexer 32 via the switch 34, and delays the audio data. The delay is adjusted by the circuit 33 and output to the multiplexer 32.

The multiplexer 32 multiplexes the input audio data and video data and outputs the multiplexed data to the digital I / F circuit 31. The audio data and the video data are input to the STB 30 and are converted into audio signals and video signals by the MPEG decoder in the STB 30. For example, variable speed reproduction, seamless reproduction, and non-linear edit reproduction are performed by software control of the CPU 9.

On the other hand, when the signal processing circuit 4 reproduces the AV data recorded on the recording medium as an analog signal, the multiplexer 19 outputs video data to the MPEG2 decoder 24 via the terminal 1 of the switch 23.

The MPEG2 decoder 24 decodes the video data from the multiplexer 19 and outputs it to the NTSC encoder 27 via the terminal 1 of the switch 26.

In the NTSC encoder 27, MPEG2
The digital data from the decoder 24 is converted into NTSC video data. The NTSC encoder 27 outputs NTSC video data to the D / A conversion circuit 28.

The D / A conversion circuit 28 performs a D / A conversion process on the video data from the NTSC encoder 27 and outputs the video data to a video output terminal as an NTSC video signal.

The multiplexer 19 outputs audio data to the MPEG1 decoder 25. This MP
The EG1 decoder 25 decodes the audio data from the multiplexer 19 and outputs it to the D / A conversion circuit 29.

The D / A conversion circuit 29 performs D / A conversion processing on the audio signal from the MPEG1 decoder 25 and outputs it to an audio output terminal.

Therefore, this information recording / reproducing apparatus 1
As described above, when digital data compressed by the MPEG system is recorded, the digital data is decoded by the MPEG2 decoder 24, and is encoded and recorded by the MPEG2 encoder 18 at a predetermined compression rate so as to be an integral multiple of the logical sector of the hard disk. When a signal of the NTSC system is input, the signal is encoded by the MPEG2 encoder 18 and recorded. Therefore, when reproducing the recorded digital data, the data is recorded only by designating the address information of the hard disk using, for example, data transfer software. Digital data can be reproduced, and the hard disk can be easily accessed. Therefore, in such an information recording / reproducing apparatus 1, it is easy to perform reproduction with, for example, a variable read speed, and various reproduction methods can be adopted.

In the information recording / reproducing apparatus 1 described above, an example has been described in which compression is performed by the MPEG2 encoder 18 so as to be an integral multiple of the logical sector of the hard disk. The compression processing may be performed at a fixed rate.
That is, the MPEG2 encoder 18 is set to 8 Mbps when the AV data compressed and recorded on the hard disk is used for editing, 4 Mbps when used as SP (Standard Play), and 2 Mbps when used as LP (Long Play). Compression processing may be performed. At this time, when the information recording / reproducing apparatus 1 reproduces the AV data recorded on the hard disk, for example, by controlling the data transfer software in the CPU 9, the reproduction is performed by changing the read capacity, thereby performing the above-described operations. Reproduction can be performed similarly.

In the above-described embodiment, the information recording / reproducing apparatus 1 adopting the method of compression-encoding and recording the AV data by the MPEG method has been described. Needless to say, compression and decompression may be performed by the DV method. At this time, the information recording / reproducing apparatus 1 described above uses the MPEG encoder and the MPE.
An encoder and a decoder for compressing and decompressing AV data by the DV system are provided instead of the G decoder. This DV system uses standard definition SD (Standard Definition), high compression SD, and high resolution television receivers (High Difinitio).
n HD (High Definitio) compatible with Television; HDTV
n) are defined as standards by the three specifications.

Next, the file system stored in the ROM 11 will be described. FIG. 2 shows a configuration example of the file system 40. This file system 40
Is about 14 from the first LBA0 to the last LBA.
The GB capacity is configured as an information area.

The file system 40 has an information area composed of a lead-in area, a first system area, a user data area, a second system area, and a backup area.

[0103] The lead-in area is composed of two sectors from the head LBA0. This lead-in area is composed of a root area, and as shown in FIG.
of contents) area start LBA, defect list area start LBA, user data area start LBA,
Information and the like indicating the start LBA of the backup area are stored. The root area also stores information indicating the start LBA of the AV data area, the start LBA of the memo data area, and the start LBA of the audio data area in the user data area. With this configuration, the root area stores division position information indicating the entire configuration of the file system 40.

This route area includes route 1 and route 2
The same content is described for each of them as a fault countermeasure.

At the end of this route area, APcoun
t is stored. This APcount is data that is incremented each time the root area is rewritten. This APcount is arranged at a position that separates the lead-in area from the system area.

As shown in FIG. 2, the first system area includes a TOC area consisting of 1534 sectors,
And a defect list area composed of sectors. In the TOC area, management information of AV data recorded in the user data area is stored. In the defect list area, a table for managing a secondary defect generated in the user data area is stored.

The TOC area is, for example, an MD (Mini)
Disk), PTOC0 to PTOC2 used for moving image data, PTOC0 to PTOC2 used for audio data, and STOC for moving image.
, An audio STOC, an MTOC, and a TOC reserved area that is a reserved area of the TOC.

This TOC area is, as shown in FIG.
An APcount is stored in the first LBA, and division position information and recording mode information for each information stored in the user data area are stored behind the APcount. The recording mode information is, for example, information indicating a compression method, a compression rate in the compression method, and the like.

The TOC area stores, for each piece of information stored in the user data area, division position information indicating the start LBA of 4 bytes and the end LBA, and recording mode information of 1 byte.

The TOC area has an STOC as a TOC for seamless reproduction, for example.
This STOC stores the LBA of the AV data area to be reproduced when performing seamless reproduction. The STOC stores, for example, a playback start LBA consisting of 4 bytes and a playback end LBA indicating the content when performing seamless playback. Then, when performing the seamless reproduction, the CPU 9 reproduces the AV data according to the LBA stored in the STOC, thereby executing the seamless reproduction.

The defect list area includes, as shown in FIG.
APcount is stored in the first LBA, and a table for managing secondary defects is stored behind the APcount.

The user data area is, as shown in FIG.
It is composed of 27249542 sectors and comprises an AV data area, a memo data area, and an audio data area. The size of each area of the user data area corresponds to the division position information stored in the root area.

The user data area is arranged, for example, in the order of an AV data area, a memo data area, and an audio data area from the outer peripheral side in a disk-shaped recording medium. In each of the AV data area, the memo data area, and the audio data area, an address indicating the head LBA is recorded in the root area.

The head LBA of this user data area is 2
A number in which only one bit is 1 in a hexadecimal notation is selected. For example, the LBA indicating the first 4096 sector of the AV data area in FIG. 2 is expressed as "h'1000" in binary notation. As described above, in the user data area, the address of each content is managed as 0, and the one bit is set at the time of translation into the ATA command, so that the LBA can be converted. Thus, the CPU 9 can easily manage the user data area. Further, by managing the LBA in this way, the size of the management area stored in the TOC area can be reduced. In addition, by managing the LBA in this way, even when performing a defect processing, the head can be managed with the head set to 0, so that the defect list in the defect list area can be easily managed.

[0115] In the AV data area, compressed AV data is recorded. As data recorded in the AV data area, moving image data compressed by the MPEG2 compression method and data compressed by the Wavelet compression method are recorded. The AV data area is recorded in each recording mode such that the compression rate in the MPEG2 compression method is, for example, 8 Mbps, 6 Mbps, 4 Mbps, and 2 Mbps. On the other hand, Wavel
In the et compression method, the compression rate is, for example, 8 Mbp.
s, 6 Mbps.

In the AV data area, mainly moving image data and audio data accompanying the moving image data are recorded temporally continuously from the recording start LBA of the area. This AV data area has a so-called ring storage structure in which data is sequentially recorded from the recording start LBA, and when the AV data is recorded in all areas, the AV data is overwritten again from the recording start LBA. When reproducing the AV data recorded in the AV data area, the reproduction is performed temporally continuously.

In this AV data area, moving image data and audio data are recorded using an AV cluster as a recording unit as shown in FIG. This AV cluster has an SH (Sequence Header) indicating the start synchronization code of the sequence layer.
Code), GOP (Group of Picture), SE (Sequence)
End Code) and an audio cluster.

The compression rate is selected by the CPU 9 so that both the video clusters and the audio clusters in the AV data area are in units of sectors, and compression processing is performed, and are recorded on the recording medium in the HDD 7. This A
The V data area has 2
N sectors.

The GOP is composed of an I picture coded using intra-frame prediction, a P picture coded using inter-frame forward prediction, and a B picture coded using bi-directional prediction. In the present embodiment, GOP
Are M = 3 and N = 15. That is, in the present embodiment, one GOP is composed of 15 pictures, and the period of an I picture or a P picture is 3. Here, the maximum size of the I picture is a fixed capacity, and the size of the GOP is also a fixed capacity.

[0120] The audio cluster stores audio data corresponding to the GOP. This audio data is stored in an MPEG Audio system or ATRAC (Adaptive Transform Acoustic Codin) which is an adaptive change coding system for audio.
g) It is recorded in a compressed format. Each audio cluster has a fixed size corresponding to one GOP.
In the present embodiment, this audio cluster is
The compression process is performed so as to be 12.288 kB consisting of 24 sectors when compressed by the MPEG Audio system or 18.432 kB consisting of 36 sectors when compressed by the ATRAC system. Then, in order to fix the capacity of the entire AV cluster, the video cluster performs compression processing by changing the compression rate in response to the change in the capacity of the audio cluster.

This AV data area is recorded on the HDD 7 with its size changed at a compression rate according to the recording mode. This AV data area is, for example, MPEG2
Compression rate of 8.184 / 8.086 Mbps (Edit Mod
When e) is set, as shown in FIG. 7A, 524.288 kB (1024 sectors) as a whole, and the I picture is 124.92
8 kB, GOP is 512 kB / 524.288 kB. When the compression rate of the MPEG2 system is set to 6.089 / 5.991 Mbps (HP Mode), for example, as shown in FIG.
B (768 sectors), I picture is 104.448 kB, GOP
Is 380.928 kB / 374.784 kB.

The AV data area is, for example, MPE
G2 compression rate of 3.994 / 3.895 Mbps (SP Mod
When e) is set, as shown in FIG. 7C, the total is 262.144 kB (512 sectors), and the I picture is 83.968 kB.
The kB and GOP are 249.856 kB / 243.712 kB.

The AV data area is, for example, MPE
G2 compression rate 1.899 / 1.800Mbps (LP Mod
e (HHR)), as shown in FIG.
131.072 kB (256 sectors) in total, 4 I pictures
3.008 kB, and the GOP is 118.784 kB / 112.640 kB.

In the above-mentioned recording mode, MPEG2
Although an example of the AV data compressed by the method has been described, the AV data may be compressed by the Wavelet method. That is, the AV data compressed by the Wavelet method includes, as shown in FIG. 8A, a fixed-size video cluster composed of a plurality of frames and a fixed-size audio cluster. The AV cluster shown in FIG. 8A is an example in which moving image data is compressed by the Wavelet method and audio data corresponding to the moving image data is compressed by the MPEG Audio method or the ATRAC method. The audio cluster is 1024 bytes composed of two sectors when compressed by the MPEG Audio system.
When it is compressed by the ATRAC method, it is 1536 bytes composed of three sectors. In the video cluster, the compression rate is changed and the compression process is performed to fix the capacity of the entire AV cluster by the compression method of the audio cluster.

FIG. 8B shows an AV cluster when the video cluster is compressed at 7.611 Mbps or 7.488 Mbps. Such a recording mode (SP
Mode), the total of the compressed AV data is 6
It consists of 32.768 kB consisting of 4 sectors, and the AV cluster consists of 31.744 kB or 31.232 kB.

FIG. 8C shows an AV cluster when the video cluster is compressed at 3.683 Mbps or 3.560 Mbps. Such a recording mode (LP
Mode), the AV data that has been compressed in 3
It consists of 16.384 kB consisting of two sectors, and the AV cluster consists of 15.360 kB or 14.848 kB.

In the memo data area, of the AV data recorded in the above-mentioned AV data area, only specific AV data selected by, for example, an operation input signal from a user is recorded. Note that the recording format and the like of the memo data area are the same as those of the AV data area, and have a ring storage structure in which recording is continuously performed in time. The memo data area has a smaller capacity than the AV data area.

The audio data area stores, for example, audio data and still image data. Unlike the AV data area and the memo data area, the audio data is not recorded continuously in time, but is recorded and / or reproduced by random access.

FIG. 9 shows an example in which the ATRAC method is used as a compression method for audio data stored in the audio data area. The audio data recorded in this audio data area is subjected to compression / expansion processing in units called sound groups, and is recorded as 484-byte data. In addition, since one sector is 512 bytes and recorded as one unit in the HDD 7, in this embodiment, the least common multiple of 424 bytes and 512 bytes is recorded as a recording unit. In the present embodiment, the least common multiple of 424 bytes and 512 bytes is 27136, and the audio area is 53 bytes.
The sector is composed of 27.136 kB consisting of 64 sound groups.

Still picture data stored in audio data is JPEG (Joint Photographic coding).
Experts Group) compression processing, as shown in FIG. 10, is made up of 212 sectors, and four audio clusters are stored as still image clusters. This still image cluster has a recording unit of 27.136 kB.

The second system area is configured as a reserved area, and includes a CG data area consisting of 20480 sectors and a system reserve area.

The backup area is, as shown in FIG.
The above-described lead-in area and the first system area have the same contents. This backup area is used, for example, for troubleshooting, by copying the contents of the lead-in area and the first system area as they are.

The backup area is stored such that the root area is the last LBA, unlike the lead-in area and the system area. That is,
In this backup area, for example, LBA0 to LBA
By fixing the capacity up to N, for example, even if the lead-in area cannot be reproduced due to a failure, the backup area can be accessed and the division position information in the recording medium can be reproduced.

The CPU 9 stores AV data and the like in a recording medium in the HDD 7 according to the file system 40. The CPU 9 changes the capacity ratio between the AV data area and the memo data area by dividing the AV data area according to, for example, an operation input signal from the user. At this time, the AV data area and the memo data area are divided according to an operation input signal via the ATA adapter 8. At this time, the CPU 9 divides the AV data area and the memo data area and updates the contents of the TOC area corresponding to the divided areas.

The recording format of the AV data area and the memo data area divided by the CPU 9 is as follows.
As described above, the ring storage structure is employed. When data is sequentially recorded from the first LBA and AV data is recorded in all areas, the AV data is overwritten again from the first LBA. When reproducing the AV data recorded in the AV data area, the reproduction is performed temporally continuously.

The CPU 9 also stores the AV data area and the memo data area stored in the user data area in the HD
It is stored on the outer peripheral side of the recording medium stored in D7, and the audio data area is recorded on the inner peripheral side of the AV data area and the memo data area. CPU 9
In this way, when the AV data area is recorded on the outer peripheral side in this way, when performing the recording / reproducing process on the temporally continuous AV data by the CAV method, even if the compression rate in the AV data area is high, the AV data area can be stably recorded. Recording and reproduction of AV data can be performed. Therefore, according to the information recording / reproducing apparatus 1 including the ROM 10 in which the file system is stored, even if the recording / reproducing of one file has a large capacity and the data is temporally continuous, the recorded and reproduced data is No breakdown occurs in the image or the like shown.

In the description of the information recording / reproducing apparatus 1 described above, the recording medium in the HDD 7 has been described as a magnetic disk. Any disk is acceptable.

Next, an example of the operation of the information recording / reproducing apparatus 1 configured as described above will be described.

The information recording / reproducing apparatus 1 first starts an initial operation as shown in FIG. 11 when power is supplied. That is, in the information recording / reproducing apparatus 1, the CP
U9 controls to read the APcount together with the division position information stored in the root area in the lead-in area of the HDD 7 in step ST11.

The CPU 9 reads the contents of the root area from the LBAs 0, 1 at the head and the LBA at the end.
Control is performed so as to read the contents of the root area in the backup area by playing back the BA, and step ST
Then, the process proceeds to the updating process of step S12,
Proceed to T13. This updating process will be described later.

In step ST13, the CPU 9 obtains the addresses of the TOC area, the defect list area and the backup area based on the division position information stored in the root area selected in the above-mentioned update processing, and proceeds to step ST14.

Next, in step ST14, TOTO is performed based on the TOC area of the system area and the TOC area of the backup area obtained in step ST13.
The C area is reproduced, and the update processing shown in FIG. 13 described later is performed in step ST15, thereby performing the TOC area update processing, and proceeds to step ST16. This updating process will be described later.

In step ST16, the above-described step S
Based on the divided position information of the root area updated by the update processing in T12, the system reproduces the defect list area of the system area and the backup area, and proceeds to step ST17.
Proceed to.

In step ST17, the update operation of the defect list area, which will be described later in detail with reference to FIG.

Next, the updating process in step ST12 will be described with reference to FIG. FIG. 12 is a flowchart showing a route area update process.
In step ST21, 2 in the lead-in area
By comparing the APcount of one root area with the APcount of two root areas in the backup area,
It proceeds to step ST22. In step ST22, the process ignores the APcount of the root area in the lead-in area and the APcount of the root area in the backup area, the difference of which is 3 or more, and proceeds to step ST23. That is,
In this step ST22, the four APcounts are compared, and when any one of the APcounts has a difference of 3 or more than the other APcounts, the APcounts are excluded.

At step ST23, the APcount in the lead-in area is changed to the APcount in the backup area.
It is determined whether or not it is larger than the threshold value. When it is determined that it is larger, the process proceeds to step ST24, and when it is determined that it is smaller, the process proceeds to step ST25. That is, this step S
At T23, among the APcounts of a plurality of route areas,
Select the route area with the largest APcount.

At step ST23, the APcount in the lead-in area is changed to the APcount in the backup area.
It is determined whether or not it is larger than the threshold value. If it is determined that it is larger, the process proceeds to step ST24.

In step ST24, the above-mentioned step S
The larger APcount selected in T23 is stored in RAM10.
Then, the process proceeds to step ST25.

In step ST25, one updated data is left in the RAM 10 and the others are cleared, the update process in the root area is completed, and the process proceeds to step ST13.

Next, step ST15 and step S15
The update process of T17 will be described with reference to FIG.
FIG. 13 is a flowchart showing an update process for the TOC area and the defect list area, and performs substantially the same process as the update process shown in FIG. That is, in step ST31, the AP count in the TOC area or defect list area in the first system area reproduced in step ST14 is compared with the AP count in the TOC area or defect list area in the backup area, and the process proceeds to step ST32.

In step ST32, the same processing as in step ST23 is performed. That is, the AP count stored in the first system area is compared with the AP count stored in the backup area, and when the AP count stored in the first system area is larger than the AP count stored in the backup area, step S is performed.
The process proceeds to T33, and if smaller, proceeds to step ST34.

In step ST33, the TOC determined to have a large APcount in step ST32 described above.
Area information or defect list area information is stored in RAM1.
0 is stored. On the other hand, in step ST34, the information of the TOC area or the information of the defect list area for which the APcount is determined to be small in step ST32 is
Erase from AM10. As a result, T
Only one information of the OC area or the defect list area is stored.

By updating data stored in the lead-in area, the system area, and the backup area at the time of startup, reliability in these areas is maintained.

Next, when the information recording / reproducing apparatus 1 reproduces the AV data recorded on the recording medium in the HDD 7, as shown in FIG. 14, first, in step ST41, an operation input signal from the user is supplied to the CPU 9 for example. Is done. Then, the CPU 9 interprets the type of the AV data to be reproduced in accordance with the operation input signal and proceeds to step ST42.
Proceed to. The type of the AV data indicates, for example, the contents of an image stored in the user data area.

In step ST42, the TOC is determined from the information stored in the root area acquired by the start operation in accordance with the type of AV data acquired in step ST41.
The area is reproduced, the management information of the content to be reproduced is selected according to the operation input signal, and the process proceeds to step ST43.

In step ST43, the CPU 9 obtains the start LBA of AV data indicating the content to be reproduced from the TOC area management information selected in step ST42 and the LBA to be reproduced in a chain from the start LBA. Then, the process proceeds to step ST44.

In step ST44, the above-described step S
The recording mode is acquired from the management information of the TOC area obtained by selecting at T42, and the process proceeds to step ST45. The recording mode includes, for example, information such as a compression method and a compression rate in the compression method.

In step ST45, in accordance with the recording mode obtained in step ST44, the CPU 9 supplies an ATA reproduction command to the ATA adapter 8 at a length and an interval corresponding to the recording mode, starts reproduction, and starts step ST46. Proceed to. At this time, the ATA adapter 8
The AV data stored in the HDD 7 is reproduced according to a reproduction command from the PU 9, and the reproduced AV data is input to the multiplexer 19 via the host bus 5 and the interface buffer 6. The multiplexer 19 divides the input AV data and reproduces the data as video data and audio data. At this time, the HDD 7 reproduces audio data and still image data from the audio data area arranged on the inner peripheral side of the recording medium, and reproduces AV data from the AV data area arranged on the outer peripheral side of the recording medium.

At step ST46, the CPU 9 sets
It is determined whether or not all of the information corresponding to the operation input signal has been reproduced. If it is determined that the AV data corresponding to the operation input signal has not been reproduced, the process proceeds to step ST45 again.
When it is determined that the AV data corresponding to the operation input signal has been reproduced, the reproduction process ends and the apparatus enters a standby state.

Next, when the information recording / reproducing apparatus 1 records AV data on a recording medium in the HDD 7, first, as shown in FIG.
For example, an operation input signal is supplied from the user. Then, the CPU 9 records A according to the operation input signal.
By interpreting the type of V data and the recording mode, step ST5
Proceed to 2. The type of the AV data includes, for example, the content of an image. The recording mode includes, for example, information such as a compression method and a compression rate in the compression method.

In step ST52, the CPU 9 sets
The TOC area is reproduced according to the type of the AV data acquired in step ST51 from the information stored in the root area acquired by the starting operation, and the management information is selected according to the content to be recorded according to the operation input signal. And step S
Proceed to T53.

At step ST53, the CPU 9 sets
The recording start LBA is obtained from the management information of the TOC area selected in step ST52 described above, and
Proceed to 54.

In step ST54, the CPU 9 sets
AT corresponding to the recording mode obtained in step ST51 described above.
An A record command is generated and output, and the process proceeds to step ST55.

At this time, the ATA adapter 8
Supplies an ATA recording command, and also supplies AV data to be recorded from the multiplexer 19. Then, the ATA adapter 8 stores the A
It outputs a signal and AV data according to the TA recording command.

Further, the CPU 19 generates a control signal for controlling the compression rate when the information signal is compressed by the MPEG2 encoder 18 in accordance with the recording mode obtained in step ST51, and generates a control signal for the host bus 5, interface buffer 6, and multiplexer 19. May be supplied to the MPEG2 encoder 19 via the. At this time, the recording is performed on the recording medium in the HDD 7 in accordance with an instruction from the CPU 9 in the AV data area arranged on the outer peripheral side and the audio data area arranged on the inner peripheral side of the AV data area, thereby compressing the data. AV data having a higher rate can be recorded on the outer peripheral side, and audio data having a lower compression rate than AV data can be recorded on the inner peripheral side.

At step ST55, the CPU 9 sets
In step ST54 described above, the file system 40 stored in the RAM 10 is updated according to the content newly recorded in the user data area of the recording medium of the HDD 7. That is, in this step ST55, the contents indicated by the AV data recorded in the user data area, the recording mode when the contents are recorded, the TOC area in which the recording start LBA, the recording end LBA, and the like are updated are updated. Proceed to ST56.

At step ST56, the CPU 9 sets
It is determined whether or not all of the AV data supplied from the multiplexer 19 has been recorded on the recording medium of the HDD 7. If it is determined that the AV data has not been recorded, the process returns to step ST54 to record the remaining AV data again. If it is determined that the AV data has been recorded, the process proceeds to step ST5.
Go to 7.

In step ST57, the CPU 9 sets
Since the content of the TOC area has been updated in step ST55, the AP count stored in the TOC area stored in the RAM 10 is incremented, and the process proceeds to step ST55.
Proceed to 58.

In step ST58, the CPU 9 records the information of the TOC area stored in the RAM 10 in the TOC area in the system area of the HDD 7, and proceeds to step ST59.

Next, in step ST59, the CPU
In step 9, the information of the TOC area in the system area recorded in step ST58 described above is recorded as it is in the TOC area of the backup area, and the recording operation ends, and the standby operation starts.

Therefore, according to such a recording process, the AV data is recorded in the user data area, the information of the TOC area changed by recording the AV data is recorded in the RAM 10, and the system area and the backup area are recorded. Record in the TOC area in the area.

Therefore, in this information recording / reproducing apparatus 1, R
A according to the file system 40 stored in the OM 11
An audio data area is provided on the inner side of the V data area and the AV data area to record and reproduce audio data and AV data on a recording medium. Therefore, according to such an information recording / reproducing apparatus 1, by recording AV data having a relatively high compression rate on the outer peripheral side of the recording medium, it is recorded continuously in time and has a capacity of one file. Is very large, it is possible to perform stable recording or reproduction processing of an image or the like without causing a failure in an image or the like indicated by the recorded or reproduced data.

[0173]

As described above in detail, the disk-shaped recording medium according to the present invention has a moving image data area in which moving image data and sound data corresponding to the moving image are stored, and a moving image data area. Since the audio data area is provided on the inner side and audio data is stored, even if moving image data and sound data corresponding to the moving image data are temporally continuously recorded at a compression rate, Reproduction processing and recording processing are performed stably. Therefore, in such a disc-shaped recording medium, data recording / reproducing processing is performed without causing a failure or the like in an image or the like represented by temporally continuous data.

Further, the information recording apparatus according to the present invention comprises a moving image data area in which moving image data and sound data corresponding to the moving image are stored, and an audio data area arranged on the inner side of the moving image data area. Since a disc-shaped recording medium comprising an audio data area in which is stored, moving image data, acoustic data corresponding to the moving image data, and recording means for recording audio data on the disc-shaped recording medium, The recording means records the moving image data and the sound data corresponding to the moving image data on the outer peripheral side of the disc-shaped recording medium, and records the moving image data and the audio data on the inner circumferential side of the sound data corresponding to the moving image data. be able to. Therefore, according to the information recording apparatus, even when the reproduction processing is performed on the disc-shaped recording medium, the reproduction processing can be stably performed even if the moving image data is temporally continuously recorded.

Further, according to the information recording method of the present invention, an audio data area is provided on the inner peripheral side of a moving image data area in which moving image data and sound data corresponding to the moving image are recorded on a disc-shaped recording medium. Since the data is recorded, the moving image data and the sound data corresponding to the moving image data can be recorded on the outer peripheral side of the disc-shaped recording medium, and the audio data can be recorded on the inner peripheral side of the recording medium. Therefore, according to this information recording apparatus, when performing the reproduction process on the disc-shaped recording medium, the reproduction process can be stably performed even if the moving image data is recorded continuously in time.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an example of an information recording / reproducing apparatus to which the present invention has been applied.

FIG. 2 is a configuration diagram showing a file system stored in a ROM.

FIG. 3 is a configuration diagram for explaining the contents of a root area of a file system.

FIG. 4 is a configuration diagram for explaining the contents of a TOC area of a file system.

FIG. 5 is a configuration diagram for explaining the contents of a defect list area of the file system.

FIG. 6 is a configuration diagram showing an example of an AV cluster stored in a user data area.

FIGS. 7A and 7B are configuration diagrams for explaining the capacity of an AV cluster in each recording mode. FIG. 7A is an AV cluster in an Edit mode, and FIG. 7B is an AV cluster in an HP mode.
(C) is an SP mode AV cluster, and (d) is an LP mode AV cluster.

FIG. 8 compresses moving image data by a Wavelet method,
FIG. 7 is a diagram for explaining an AV cluster when audio data is compressed by MPEG Audio or ATRAC method;
(A) compresses moving image data by Wavelet method,
MPEG Audio data corresponding to moving image data
It is an example when compression is performed by the method or ATRAC method,
(B) is the AV cluster at the time of SP Mode, and (c)
Is an LP mode AV cluster.

FIG. 9 is a configuration diagram for explaining audio data stored in an AV cluster.

FIG. 10 is a configuration diagram for explaining still image clusters stored in audio data.

FIG. 11 is a flowchart illustrating a process performed when the information recording / reproducing apparatus according to the present embodiment is started.

FIG. 12 is a flowchart for describing an update process for updating a root area in a process performed when the information recording / reproducing device according to the present embodiment is started.

FIG. 13 is a flowchart for describing an update process for updating a TOC area and a defect list area in a process performed when the information recording / reproducing apparatus according to the present embodiment is started.

FIG. 14 is a flowchart for describing processing when AV data is reproduced by the information recording / reproducing apparatus according to the present embodiment.

FIG. 15 is a flowchart for explaining processing when recording AV data by the information recording / reproducing apparatus according to the present embodiment.

FIG. 16 is a block diagram showing a conventional information recording / reproducing apparatus.

[Explanation of symbols]

1 information recording / reproducing device, 7 HDD, 9 CPU, 10
RAM, 11 ROM, 40 file system

Claims (33)

[Claims] 1. A moving image data area in which moving image data and sound data corresponding to the moving image data are stored, and an audio data area arranged on an inner side of the moving image data area and storing audio data. A disk-shaped recording medium comprising: 2. The disk-shaped recording medium according to claim 1, further comprising a management area storing management information for managing the moving image data area and the audio data area. 3. The management area includes a division position information area in which division position information is stored, a content area in which content information indicating the contents of a moving image data area and an audio data area is stored, and the moving image data area. 3. The disk-shaped recording medium according to claim 2, comprising a defect list area indicating a defect in the audio data area. 4. The disk-shaped recording medium according to claim 3, wherein a table for special reproduction is stored in the content area. 5. The head address of the moving image data area and the audio data area, when described in a binary notation, is described such that at least one bit is represented by one. A disc-shaped recording medium as described in the above. 6. A moving image data area in which moving image data and sound data corresponding to the moving image data are stored, and an audio data area arranged on an inner side of the moving image data area and storing audio data. An information recording apparatus, comprising: a disc-shaped recording medium comprising: a recording medium for recording moving image data, acoustic data corresponding to the moving image data, and audio data in the storage means. 7. An operation input means for generating an operation command for controlling said recording means, wherein said recording means is adapted to store a capacity of said moving image data area and said audio data area in response to an operation command from said operation input means. 7. The information recording apparatus according to claim 6, wherein data is recorded by arbitrarily changing a ratio with respect to the capacity of the information recording apparatus. 8. The recording means records the moving image data in the moving image data area continuously from the recording start logical block to the recording end logical block, and records the moving image data again from the recording start logical block. The information recording device according to claim 6, wherein 9. The recording unit according to claim 6, wherein the recording unit records data stored in the moving image data area and the audio data area of the storage unit with a recording unit having a capacity of an integral multiple of a logical sector. Information recording device. 10. The recording means for recording data on the disc-shaped recording medium by changing a compression rate of moving image data in accordance with an operation command indicating a recording mode from the operation input means. Item 10. The information recording device according to Item 9. 11. The recording means records data by performing compression processing so that the maximum size of a GOP and an I picture conforming to the MPEG system is an integral multiple of a logical sector of the disc-shaped recording medium. The information recording device according to claim 6. 12. The information according to claim 11, wherein the recording means compresses the audio data so as to be an integral multiple of a logical sector of the disk-shaped recording medium and records the compressed audio data in a moving image data area. Recording device. 13. The recording means according to claim 1, wherein the recording means compresses and records the moving image data area by a DV method so that the capacity of one frame is an integral multiple of the logical sector of the disc-shaped recording medium. Item 7. The information recording device according to Item 6. 14. The recording unit according to claim 1, wherein the recording unit sets the ATRAC so that a recording unit of a least common multiple of 424 bytes of audio data and a logical sector is set as a recording unit in an audio data area.
7. The information recording apparatus according to claim 6, wherein the information is recorded on the disk-shaped recording medium by performing compression processing by a method. 15. An information recording apparatus according to claim 14, wherein said recording means compresses still image data in a recording unit having the same capacity as audio data in an audio area and records the compressed still image data on said disc-shaped recording medium. apparatus. 16. The information recording apparatus according to claim 6, wherein said disc-shaped recording medium includes a management area storing management information for managing a moving image data area and an audio data area. 17. The management area includes a division position information area in which division position information is stored, a content area in which content information indicating the contents of a moving image data area and an audio data area is stored, and the moving image data area. 17. The information recording apparatus according to claim 16, comprising a defect list area indicating a defect in the audio data area. 18. A management table for special reproduction is stored in the content area.
Information recording device according to the above. 19. The head address of a moving image data area and an audio data area, when described in binary notation, is described such that at least one bit is represented by one. Information recording device. 20. An audio data area provided on an inner peripheral side of a moving image data area in which moving image data and sound data corresponding to the moving image are recorded on a disc-shaped recording medium, and the audio data is recorded. Information recording method. 21. The information recording method according to claim 20, wherein the data is recorded by arbitrarily changing the ratio between the capacity of the moving image data area and the capacity of the audio data area according to an operation command. . 22. A recording method according to claim 21, wherein moving image data is continuously recorded from a recording start logical block to a recording end logical block in said moving image data area, and moving image data is recorded again from a recording start logical block. 20. The information recording method according to item 20. 23. The information recording apparatus according to claim 20, wherein data stored in the moving image data area and the audio data area of the disc-shaped recording medium is recorded with a capacity of an integral multiple of a logical sector as a recording unit. Method. 24. The information recording method according to claim 23, wherein data is recorded on said disc-shaped recording medium by changing a compression rate of moving image data in accordance with an operation command indicating a recording mode. 25. The data according to claim 20, wherein the data is recorded by compressing the maximum size of the GOP and I picture conforming to the MPEG system so as to be an integral multiple of the logical sector of the disc-shaped recording medium. Information recording method. 26. The information recording method according to claim 25, wherein the acoustic data is compressed so as to be an integral multiple of a logical sector of the disk-shaped recording medium and recorded in a moving image data area. 27. The moving picture data area according to claim 20, wherein a capacity of one frame is compressed by a DV system so as to be an integral multiple of a logical sector of said disc-shaped recording medium and recorded. Information recording method. 28. A recording method according to claim 28, wherein the audio area is compressed by an ATRAC method so that a recording unit of a least common multiple of 424 bytes and a logical sector is used as a recording unit. Item 20. The information recording method according to Item 20, wherein 29. The information according to claim 28, wherein the still image data is recorded in the audio data area, compressed in a recording unit having the same capacity as the audio data, and recorded on the disc-shaped recording medium. Recording method. 30. The information recording method according to claim 20, wherein the disc-shaped recording medium includes a management area storing management information for managing the moving image data area and the audio data area. 31. The management area includes a division position information area in which division position information is stored, a content area in which content information indicating the contents of a moving image data area and an audio data area is stored, and the moving image data area. 31. The information recording method according to claim 30, comprising a defect list area indicating a defect in the audio data area. 32. A management table for trick play is stored in the content area.
Information recording method described. 33. The head address of the moving image data area and the audio data area, when described in binary notation, is described such that at least one bit is represented by one. 20. The information recording method according to item 20.