JP2003346419A - Optical disk device and method for recording on optical disk - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device capable of loading CD-ROM audio or DVD audio, CD-DA, CD-ROM and the like, and discriminating/verifying the kinds of these disks to automatically play them. <P>SOLUTION: The kind of a disk is discriminated by a CPU 14 based on a signal read from a disk 1, signal processing such as decoding corresponding to the encoding of recording time necessary in accordance with the kind is carried out by an orthogonal conversion/Huffman code decoder 26, and an optimal playback mode is provided for the optical disk. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk apparatus and a recording method for an optical disk, and more particularly to an optical disk apparatus and a recording method capable of reproducing information from a plurality of types of optical recording media.

[0002]

2. Description of the Related Art C as an optical disc for audio reproduction
More than ten years have passed since D (Compact Disc) came on the market, and as a recording medium for audio information, it has already remarkably spread beyond the conventional cassette tape. CDs as optical recording media for audio information such as music mainly have an outer diameter of 8 cm and 12 cm, and are generally called CD-DA since they are digital audio recording CDs. The physical / logical format of a CD, which is a digital disk, has been established as an EFM modulation recording method for 8-bit fixed data length symbols and a data format method for subcode, audio data, CRC, etc., and a CD to which various application functions are added. A player is being developed. Also CD
Is also used as a CD-ROM for data of a computer or the like by identifying the control bits (4 bits) of the Q channel in the subcode, and effectively utilizes the large capacity and high-speed accessibility of a digital disk. And its applications are expanding in the field of electronic publishing. Furthermore, a high-density disk called a DVD is being used as a digital disk for data of a computer or the like. A digital disk is a CD,
It refers to an optical disk such as a CD-ROM or a DVD on which audio or video signals are recorded as digital signals.

[0003] In the above-mentioned CD-ROM, the sound is compressed by ADPCM, and the original sound quality cannot be reproduced by the compression, so that a recording with higher fidelity has been desired. In other words, it is expected that an audio disc with a sound quality that is superior to that of a normal CD even when compressed, and that is equivalent to, for example, 20-bit recording will appear. From this point of view, the present applicant has converted audio data, which has conventionally been 16-bit 2-channel digital data, to a quantization bit number of 16 or 20, and a sampling frequency of 44.1 kHz.
A recording apparatus for quantizing at a frequency of z or higher, performing data processing by orthogonal transformation and / or Huffman coding, performing compression for reducing the amount of data, and recording in a CD-ROM format, and a recording method using such a method. Considering a recorded optical disk, several patent applications have already been filed (hereinafter referred to as prior applications). This disc is called a CD-ROM audio and is distinguished from a normal data CD-ROM. The CD-ROM audio can have a sink and a header required for the ROM format, and can have a CD-DA audio. The above amount of audio data can be recorded.

Further, in a digital disk called a DVD, since sound is recorded without being compressed by linear PCM, a data amount is required for recording with higher fidelity, and the recording time is shortened. For this disc, compression is performed to reduce the amount of data by performing data processing by orthogonal transformation and / or Huffman coding, and the
A recording device for recording in the D format and an optical disk recorded in such a format are conceivable.

[0005]

SUMMARY OF THE INVENTION CD-RO
When playing M audio on a normal optical disc device,
Since the data is orthogonal transformation and / or Huffman code data, the signal processing circuit naturally needs an orthogonal transformation and / or Huffman code decoder, but CD-DA, which is already widely used for users, is also available. If it can be shared, it is convenient.
Since the data format of the D-ROM standard is used as the basic format, it is easy to share and reproduce the CD-ROM. Therefore, the present invention particularly provides a CD-DA having a different data format within the range of CD variation.
It is an object of the present invention to provide an optical disk device capable of loading a specific digital disk such as a so-called super CD using a DVD or the like, and discriminating and confirming the type of the disk and automatically reproducing the disk.

Further, the present invention can load DVD audio (a type of specific disc audio) and CD-DA, which are generally considered to have different data formats within the range of CD variation (size / modulation method). Disc type and disc type.
It is an object of the present invention to provide an optical disk device capable of automatically setting a decompression decode mode according to a compression method at the time of recording and reproducing information when reproducing D audio.

[0007]

In order to achieve the above object, the present invention comprises the following means 1) to 4).
1) A method for recording on an optical disc having information specifying that the disc is an audio-only DVD disc having a higher density than CD-DA, and a pack including audio data, wherein a user data area of the pack includes: The multi-channel audio signal is the CD-DA quantization bit number 1
The number of quantization bits exceeding 6, and the sampling frequency of 88.2 kHz, which is twice the sampling frequency of 44.1 kHz of the CD-DA.
z stores the data quantized by z and coded by the Huffman code or the orthogonal transform / Huffman code, and as the coding ID for specifying the coding method in sector units, the user data of each sector of the DVD. Format it so that it is stored in a predetermined subheader of the area,
A method for recording on an optical disk, wherein the formatted data is recorded on the optical disk as a DVD format. 2) An optical disk apparatus capable of reproducing information from an optical disk recorded by the recording method according to claim 1, wherein a reproduction signal is supplied to an orthogonal transform / Huffman code decoder or a Huffman code decoder according to the encoding method. Means for supplying and decoding the multi-channel audio signal. 3) A CD-DA and a DVD disc dedicated to audio having a higher density than the CD-DA, wherein the multi-channel audio signal has a quantization bit number of 16 for the CD-DA.
Of a pack composed of a header and user data, quantized by a quantization bit number exceeding the number of bits and a sampling frequency of the CD-DA exceeding 44.1 kHz, and coded by an orthogonal transform / Huffman code. The encoded data is stored in the user data, and the encoding method is specified as an encoding ID for specifying the encoding method on a sector basis so as to be stored in a predetermined subheader of the user data area of each sector of the DVD. This formatted data is recorded as a DVD format, and information is recorded from two types of discs, namely, an audio-only DVD disc recorded with a code that can be identified as the audio-only DVD disc. An optical disc device capable of reproducing,
A decoder for CIRC decoding responding to a signal read from the loaded optical disc, a DVD digital disc unpacking decoder responding to an output signal of the decoder for CIRC decoding, and the type of the loaded optical disc being the audio Exclusive DVD disk or CD-D
A discriminating means for discriminating A, an orthogonal transform / Huffman code decoder responding to the output signal of the decoder for CIRC decoding or the DVD disc unpacking decoder, and discriminating means that the discriminating means is a DVD disc dedicated to audio. In this case, the output signal of the unpacking decoder is supplied to the orthogonal transform / Huffman code decoder, and the orthogonal transform / Huffman code decoder is set to a decode mode, and the discriminating means is determined to be CD-DA. In such a case, the optical disc apparatus comprises: mode setting means for setting the orthogonal transform / Huffman code decoder to pass through the decoder so as to output the output signal of the decoder for CIRC decoding. 4) A CD-DA and an audio-only DVD disc having a higher density than the CD-DA, wherein the multi-channel audio signal has a quantization bit number of 16 for the CD-DA.
And the user data of a pack composed of a header and user data, quantized by the number of quantization bits exceeding the number of bits and the sampling frequency of the CD-DA exceeding 44.1 kHz and encoded by the Huffman code. The encoded data is stored, and is encoded so as to be stored in a predetermined subheader of a user data area of each sector of the DVD as a coding ID for specifying the coding method in units of sectors, Reproducing information from two types of discs: the formatted data is recorded as a DVD format, and an audio-only DVD disc recorded with a code that can be identified as the audio-only DVD disc. An optical disc device that can read data from a loaded optical disc. A decoder for CIRC decoding responding to the output signal, a DVD disc unpacking decoder responding to an output signal of the decoder for CIRC decoding, and a type of the loaded optical disk being the audio-only DVD disk or CD- Discriminating means for discriminating whether the signal is DA or the CIRC decoding decoder or the DVD
A Huffman code decoder that responds to an output signal of a disc unpacking decoder, and, when the discriminating means determines that the disc is an audio-only DVD disc, supplies an output signal of the unpacking decoder to the Huffman code decoder; The Huffman code decoder is set to a decode mode, and when the discriminating means determines that the disc is CD-DA, the Huffman code decoder is passed through so as to output an output signal of the decoder for CIRC decoding. An optical disk device having mode setting means for setting.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. Embodiments of the present invention will be described on the premise of a wide variety of reference examples, and Tables 2 and 3 described below will be used to facilitate understanding of the description.
Summarizes the contents of each reference example and example. FIG. 1 is a block diagram showing a first reference example of the optical disk device of the present invention. This reference example has both recording and reproducing functions.
As in the conventional optical disk apparatus, a spindle motor 2 for rotating and driving an optical disk 1 which is a phase change disk, an optical head 3 having a laser and an optical system, a spindle servo unit 4 for controlling the spindle motor 2, and a focus servo for controlling the optical head 3. A tracking servo unit 5, a spindle servo unit 4, a servo control circuit 6 for controlling the focus / tracking servo unit 5, an RF amplifier 7 for amplifying an output signal from the optical head 3, and a reproduction for EFM demodulating a signal from the RF amplifier 7 A decoder 8, a recording encoder 10 that performs EFM modulation of a recording data signal that has undergone predetermined processing, and a laser drive unit 9 that controls the power of the optical head 3 during recording according to a signal from the recording encoder 10. . The signal processing circuit 11 supplies a signal from the input analog circuit 13 to the recording encoder 10 and performs a predetermined process when supplying a signal from the reproduction decoder 8 to the output analog circuit 12. Is an important part of the present invention and will be described later in detail.

A CPU (Central Processing Unit) 14 controls the signal processing circuit 11, and the details of the control will be described later with reference to flowcharts. Another CP
A U (Central Processing Unit) 17 controls the display unit 16 and the CPU 14 in response to an instruction from the operation unit 15 to control the entire optical disk apparatus (system), and performs a predetermined display on the display unit 16. . Before describing the signal processing circuit 11, what the above-described CD-ROM audio to which the first reference example is applied will be described together with a block diagram of its recording system. FIG. 9 is a block diagram showing a main part of a recording apparatus or a compression apparatus disclosed in a patent application entitled "Audio Signal Compression Recording Apparatus, Audio Signal Compression Apparatus, and Optical Recording Medium" filed by the present applicant prior to the present application. It is. FIG. 10 is a block diagram showing an example of the signal processing circuit in FIG.

The input terminal I of the recording device or compression device of FIG.
For example, an analog signal such as a music signal is supplied to N.
The output terminal OUT2 is connected to a CD master making machine (not shown), that is, a mastering device via a premastering device as necessary. 9 includes an A / D converter 31 connected to an input terminal IN, a signal processing circuit 32 connected to its output, a memory 33 connected to the signal processing circuit 32, and an output of the signal processing circuit 32. CD- connected to
ROM encoding circuit 34 and CD-ROM encoding circuit 34
Has a CD encoding circuit 35 connected to the output of the.
The output of the CD-ROM encoding circuit 34 is a first output terminal OU
The output of the CD encoding circuit 35 is connected to the second output terminal OUT2. In some cases, the CD encoding circuit 35 is unnecessary.

The A / D converter 31 operates as quantization means for quantizing the audio signal at a quantization bit number of 20 bits and a sampling frequency of 44.1 kHz or higher. Although the sampling frequency is 44.1 kHz or 88.2 kHz according to the reference example, the sampling frequency is 44.1 kHz.
Hz or more. When a music signal is targeted, it is usually two channels on the left and right, but it can be four channels, six channels, or the like as necessary for surround or other purposes. Here, the case of two channels will be described. The quantized data obtained by the A / D converter 31 is stored in the memory 3 via the signal processing circuit 32 in units of 2 m (m is a positive integer) per channel.
Written in 3. After that, the signal processing circuit 32
Start processing of data.

FIG. 10 is a block diagram showing an example of the signal processing circuit 32. The 2m data is subjected to orthogonal transformation by the orthogonal transformation circuit 40 to obtain a frequency spectrum. This frequency spectrum is divided into a plurality of filters 36a, 36b, 36c. . . The signal is supplied to a normalization unit / quantization unit 41 via a filter bank 36 having 36n and a switch circuit 37 as selection means, and is normalized and quantized collectively for each band. Here, a normalization level (number of bits) is used as auxiliary information, and spectrum data is used as main information as a data frame. This data frame is supplied to a Huffman encoding circuit 38, which performs a Huffman encoding process to reduce and compress the data amount, and creates a new data frame using the codebook index as auxiliary information and the processed data as main information. Then, these are sequentially written to the memory 33. Next, this new data frame is read out from the memory 33, and the CD shown in FIG.
-Output to the ROM encoding circuit 34.

In the CD-ROM encoding circuit 34, a synchronizing signal (SY) is supplied to each sector so as to have a predetermined format.
NC), a header, a subheader, and the like, and the compressed audio data provided from the signal processing circuit 32 is arranged and output in the user data area of each sector. The output data of the CD-ROM encoding circuit 34 is output via a first output terminal OUT1, is recorded on, for example, a magnetic tape, and is supplied to a premastering device or a mastering device for manufacturing a read-only CD. On the other hand, the output data of the CD-ROM encoding circuit 34 is given to a CD encoding circuit 35 in the case of a writable, so-called write-once type CD, is CD-formatted, and has a second output terminal OU
Recording is performed by a recording head (not shown) via T2.

Next, some embodiments of the recording apparatus and CD-ROM audio according to the prior application will be described with reference to FIG. FIG. 23 shows various formats of a CD in units of sectors.
CD-DA, and various CD-ROMs from the second stage to the sixth stage. As the above-mentioned prior application, there are roughly the following four modes (1) to (4). However, it is further subdivided by the compression method. Further, the present invention includes a case where the present invention is applied to a DVD shown in FIG. 35 described later, and in this case, two modes (5) and (6) are shown.

[0015]

[Table 1]   (1) CD-ROM (XA) mode 2, Form 2 (6th row in FIG. 23)           Sampling frequency: 44.1 kHz           Quantization bit number: 16 bits or 20 bits   (2) CD-ROM (XA) mode 2, form 2 (6th row in FIG. 23)           Sampling frequency: 88.2 kHz           Quantization bit number: 16 bits or 20 bits   (3) CD-ROM mode 2 (fourth row in FIG. 23)           Sampling frequency: 44.1 kHz           Quantization bit number: 16 bits or 20 bits   (4) CD-ROM mode 2 (fourth row in FIG. 23)           Sampling frequency: 88.2 kHz           Quantization bit number: 16 bits or 20 bits   (5) DVD (Fig. 35)           Sampling frequency: 48kHz           Number of quantization bits: 20 bits or 24 bits   (6) DVD (Fig. 35)           Sampling frequency: 96 kHz           Number of quantization bits: 20 bits or 24 bits

In the CD-ROM (XA) mode 2 and form 2, the user data is 2324 bytes. Also,
In CD-ROM mode 2, the user data is 2336
Bytes. In these standards, since the data amount of user data, that is, the number of bytes is relatively large, the amount of data that can be recorded and stored on one disk is large, which is advantageous. When the CD-ROM (XA) mode 2 and form 2 of the above (1) and (2) are used, a subheader uniquely assigned can be defined.

By using bits 5 and 2 of the submode byte in the subheader for this encoding ID, it is possible to decode this format while looking at the subheader. The format condition can be recorded in the sub-header. There are two methods for this. One is a method of inputting the format condition of the sector, and the other is a method of recording the format condition divided into a plurality of sectors. In this case, the information of the plurality of sectors can be gathered and decoded. .

In the above four aspects, the sampling frequency is 88.
In (2) and (4), which are 2 kHz, 1
A frame. Therefore, 44.1
Recording time is halved compared to the case of kHz.

The apparatus shown in FIG. 9 including the signal processing circuit 32 shown in FIG. 10 comprises a quantization means for quantizing an audio signal with a quantization bit number of 20 bits and a sampling frequency of 44.1 kHz or more, and the quantization means. Compression means for applying an orthogonal transform and a Huffman code to each of a predetermined amount of quantized data quantized by the quantization means to compress the data amount, and converting the data compressed by the data compression means into a CD-ROM (XA)
An audio signal compression / recording apparatus comprising: formatting means for formatting data in a user data area of standard mode 2, form 2; and means for recording data formatted by the formatting means on a recording medium in a CD format.

FIG. 11 is a block diagram showing still another example of the signal processing circuit in FIG. 9 which is shown in another prior application filed by the present applicant and filed together with the above-mentioned earlier application. This circuit differs from FIG. 10 in that the Huffman encoding circuit 38 is omitted. That is, the apparatus shown in FIG. 9 including the signal processing circuit shown in FIG. 11 includes a quantizing means for quantizing an audio signal at a frequency of 16 bits and a sampling frequency of 44.1 kHz or more, and the quantizing means. A data compression unit for compressing the data amount by applying an orthogonal transformation to each of the predetermined amount of quantized data quantized by the step (a), and a data compression unit that converts the data compressed by the data compression unit into a CD-ROM (XA) standard mode 2,
Formatting means for formatting the data to be arranged in the user data area of form 2;
Means for recording on a recording medium as a D format.

FIG. 12 is a block diagram showing still another example of the signal processing circuit in FIG. 9 which is shown in another prior application filed by the present applicant and filed together with the above-mentioned earlier application.
This circuit differs from FIG. 10 in that the orthogonal transform circuit 40 is omitted. That is, the apparatus shown in FIG. 9 including the signal processing circuit shown in FIG. 12 includes a quantizing means for quantizing an audio signal at a frequency of 16 bits and a sampling frequency of 44.1 kHz or more, and the quantizing means. A data compression means for applying a Huffman code to each of a predetermined amount of quantized data quantized in the step (a) and compressing the data amount, and converting the data compressed by the data compression means into a CD-ROM (XA) standard mode 2, An audio signal compression / recording apparatus comprising: formatting means for formatting so as to be arranged in a user data area of a form 2; and means for recording data formatted by the formatting means on a recording medium in a CD format.

Returning to FIG. 1, reproduction of a CD manufactured by performing recording by the recording apparatus of FIG. 9 including any of the signal processing circuits of FIGS. 10 to 12 will be described. The signal processing circuit 11 performs the CIRC encoding / decoding, error detection and correction, etc. together with the CD-DA signal processing unit 20 and the CD-R
An encoder 21 and a decoder 22 relating to the OM (XA) format, switch circuits 23 and 24 constituting a through-pass circuit of the encoder 21 and the decoder 22, an encoder 25 and a decoder 26 relating to the orthogonal transform / Huffman code,
And switch circuits 27 and 28 constituting a through-pass circuit of the encoder 25 and the decoder 26.
In the recording mode, a selection instruction input from the operation unit 15
In the reproduction mode, the connection states of the switch circuits 23, 24, 27, and 28 are switched under the control of the CPU 14 based on the decoding processing data obtained from the CD-DA signal processing unit 20.

First, in the recording mode, when the operator sets the recording mode from the operation unit 15 and turns on a format selection button corresponding to the standard and recording format of the loaded optical disc 1, the CPU 17 outputs the selection signal. The CPU 14 notifies the CPU 14 and controls the connection state of the switch circuits 23 and 27 in accordance with the selected CD-DA / CD-ROM audio. That is, by setting the recording mode, the switch circuit 2 of the output system
When the CD-DA format is selected, the switch circuit 23 is connected to the e side, the switch circuit 27 is connected to the g side, and the encoders 21 and 25 are both in the through-pass mode. When the CD-ROM format is selected, the switch circuit 23 is set to the f side, and the switch circuit 27 is set to the g
, The encoder 25 is set to the through-pass mode, the encoder 21 is set to the encode mode,
When the CD-ROM audio format is selected, the switch circuit 23 is connected to the f side and the switch circuit 27 is connected to the h side, and both the encoders 21 and 25 are set to the encode mode.

In accordance with the setting of the recording mode, the servo control circuit 6 optimally sets the rotation speed of the spindle motor 2 and the focus of the optical head 3 by the spindle servo unit 4 and the focus / tracking servo unit 5. The position is set to the recording start position of the optical disk 1.
When a recording signal is input via the input analog circuit 13, the CD-DA format is selected and the CD-DA format is selected.
Only the DA signal processing unit 20 performs the CIRC encoding process, supplies the encoded signal to the recording encoder 10, and performs recording on the optical disc (CD-DA) 1 in a normal CD standard format. In the selected state of the ROM format, data passed through the encoder 25 is converted into an interleave format corresponding to the CD-ROM (XA) standard by the encoder 21, and the data is CIRC-encoded by the CD-DA signal processing unit 20. The encoded signal is supplied to the recording encoder 10 to perform recording on the optical disk 1 in the CD-ROM format. In the selected state of the CD-ROM audio format, the encoder 25 performs the compression processing by the orthogonal transform / Huffman code. And the audio data after the compression processing is The data is set to an interleave format conforming to the D-ROM (XA) standard, the data is subjected to CIRC encoding processing by the CD-DA signal processing unit 20, and the encoded signal is supplied to the recording encoder to be recorded on the optical disc 1 by the CD. -Perform recording in ROM audio format. Further, based on the address information obtained from the preformat section and the pregroup section of the optical disc 1, information relating to the recording start / end position and the address / time is recorded in the inner area of the optical disc 1 as TOC information.

Next, the operation procedure in the reproduction mode is shown in FIG.
This will be described with reference to the flowchart of FIG. First, the switch circuits 23, 24, 27, and 28 are in a floating state.
When the playback mode is set from 5 and a playback instruction is given, spindle focus control is executed as in the recording mode, and the optical head 3 is moved to the inner area of the optical disc 1 and the TOC of the area is moved. The information is read (steps S1, S2). At this time, TOC
Information is input from the RF amplifier 7 to the signal processing circuit 11 via the reproduction decoder 8.
-TOC subjected to CIRC decoding processing in DA signal processing unit 20
The information is saved in the CPU 17 via the CPU 14.

By reading the control bits (4 bits) of the TOC in step S2, it can be determined whether or not the disc is a CD-ROM. However, since the CD-ROM permits the TOC to be absent in the standard, some discs cannot read the control bits. Therefore, a step S2A for judging whether or not the TOC can be read is provided, and when the TOC cannot be read, the information reproduction section of the first track is read immediately without displaying the disk reproduction impossible (step S7). By the way, the TOC information includes the table of contents information such as the number of the program (song or video) recorded on the optical disc 1 and the address / time information.
The channel has a frame structure as shown in FIG. 3, and a control bit (4 bits) and an address bit (4 bits) are added prior to a data bit (72 bits) representing the information. When Q2 is "0", the control bits Q1 to Q4 indicate that the disc is an audio disc, and when Q1 is "1", the disc indicates a data disc.
Is of course an audio disk, and CD-ROM and CD-ROM audio are handled as data disks. Therefore, the CPU 17 determines the type of the optical disc 1 from the contents of the saved control bits Q1 to Q4 (step S3).

Now, the control bits Q1 to Q4 are set to "0".
00000 "/" 1000 "/" 0001 "/" 100
If Q2 is "0" in any of "1", the CPU
17 immediately turns on the CD-DA flag, and upon detecting that the flag is raised, the CPU 14 connects the switch circuit 24 of the signal processing circuit 11 to the b side and the switch circuit 28 to the d side (step S3 → step S4, S5), that is, based on the fact that Q2 is "0", it is determined that the loaded optical disk 1 is a CD-DA, and the reproducing system CD-ROM (XA) decoder 22 and the orthogonal transform / Huffman Set the code decoder 26 to the through-pass mode and
-Only the DA signal processing unit 20 is set to the operation mode.

The servo control circuit 6 moves the optical head 3 to the first track of the optical disk 1 by the focus / tracking servo unit 5, and thereafter, while performing the spindle tracking control by the servo control circuit 6, the data after the first track is read. Is read and reproduced (step S6).
Specifically, the signal read from the optical disc 1 is RF
The signal is amplified by the amplifier 7, EFM-demodulated by the reproduction decoder 8, input to the signal processing circuit 11, and subjected to CIRC decoding by the CD-DA signal processing unit 20 in the signal processing circuit 11, and configured by the switch circuits 24 and 28. The signal is output to the output analog circuit 12 through the through-pass circuit, and is subjected to D / A conversion by the output analog circuit 12 to obtain an audio reproduction signal.

Next, if the control bits Q1 to Q4 are "0100" and Q2 is "1", the CPU
Numeral 17 assumes that the loaded optical disk 1 is a CD-ROM or a CD-ROM audio, and moves the optical head 3 to the first track of the optical disk 1 by the servo control circuit 6 to read the first track. The code of the information section included in the track is confirmed (step S3 → steps S7, S8). in this case,
Although it may be confirmed from the EFM demodulated data of the reproduction decoder 8, in this embodiment, the CPU 14 detects the code of the information part decoded by the CIRC in the CD-DA signal processing unit 20 of the signal processing circuit 11.

By the way, in the information section, when the optical disk 1 is a CD-ROM, a CD-ROM
If the code is CD-ROM audio, an audio-only code is recorded, and the CPU 14 determines whether the loaded optical disc 1 is a CD-ROM based on the detected code.
It is possible to confirm whether it is ROM or CD-ROM audio. If the detected code is an audio-only code, the CPU 14 outputs a switch control signal to the signal processing circuit 11, connects the switch circuit 24 to the a side, and decodes the CD-ROM (XA) decoder 22. Mode. (S7, S8 → S9). That is, the loaded optical disk 1 is assumed to be CD-ROM audio due to the detection of the audio-only code. However, since this CD is recorded in the CD-ROM (XA) format as described above, -ROM (XA)
It requires decoding by the decoder 22. At this stage, the switch circuit 28 is not controlled and is kept in the floating state.

After the switching of the switch circuit 24 to the "a" side is completed, the CPU 17, which detects the CD-ROM audio, sets a preliminary reproduction mode, and the servo control circuit 6 controls the optical head 3 to drive the optical disk. Then, the data is moved to one predetermined track, and the check data of that track is reproduced preliminary (steps S10, S11). In this preliminary reproduction mode, the CPU 14 directly takes in data from the output side of the orthogonal transform / Huffman code decoder 26 and checks whether or not the decoded data is normal.

If it is confirmed that the decoded data is normal, the CD-ROM audio flag is immediately turned on.
And outputs a control signal to the signal processing circuit 11,
At this stage, the switch circuit 28 is connected to the side c (steps S13 to S15). That is, in this case, the optical disk 1 loaded with the audio-only code
Is temporarily determined to be CD-ROM audio,
At this stage, it is not determined that the audio is CD-ROM audio yet, but the determination is finalized after waiting for the confirmation result in the preliminary reproduction mode. Note that the read / decoded data in the preliminary reproduction mode is not output to the output analog circuit 12 because the switch circuit 28 is in a floating state until this stage.

When the switch circuit 28 is connected to the c side through the above procedure, the signal processing circuit 11 can output the orthogonal transform / Huffman code decoded data to the output analog system circuit 12, and the CPU 17 can control the servo control circuit. 6, the reading operation is started again from the beginning of the second track, and the audio data of the second and subsequent tracks are sequentially reproduced (step S16). In that case, the signal processing circuit 11 transfers the data that has been CIRC decoded by the CD-DA signal processing unit 20 to the orthogonal transform / Huffman code decoder 26 via the CD-ROM (XA) decoder 22 and performs orthogonal transform / transform.
The data decoded by the Huffman code decoder 26 is supplied to the output analog circuit 12.

On the other hand, in step S8, the code of the information section is not an audio-only code but a CD.
If the code is a ROM code, the CPU 14 outputs a switch control signal to the signal processing circuit 11 and similarly connects the switch circuit 24 to the a side, thereby causing the CD-ROM (XA)
Put the decoder 22 in the decode mode (S8 → S17,
S18). At this stage, the floating state is maintained without controlling the switch circuit 28. Then C
The PU 17 turns on the CD-ROM flag and supplies a switch control signal to the signal processing circuit 11 to connect the switch circuit 28 to the d side, thereby setting the orthogonal transform / Huffman code decoder 26 to the through-pass mode (steps S23 to S23).
S24A).

When the switch circuit 28 is connected to the d side through the above procedure, it is possible to output the decoded data from the CD-ROM (XA) format decoder 22 from the signal processing circuit 11 to the output analog system circuit 12. And CPU1
Numeral 7 causes the servo control circuit 6 to start reading from the beginning of the first track again, and sequentially reproduce data from the first track on (step S25). In that case, in the signal processing circuit 11, the CD-DA signal
The RC-decoded data is decoded by a CD-ROM (XA) decoder and supplied to the output analog circuit 12.

In step S3, the CD-ROM or C
Even if D-ROM audio is determined, step S
8 → Audio-only code is also CD-RO in S17
If no M code is detected, or if normal decoded data is not obtained in step S13, it is assumed that a disk of another variation that cannot be reproduced by this optical disk device is loaded. So CP
U17 transfers the display data indicating that reproduction is impossible to the display unit 16 and causes the display unit 16 to display the display (steps S17 and S1).
3 → S26).

As described above, the optical disk device of this embodiment is a CD-DA, a CD-ROM audio, and a CD-ROM.
Both have a configuration in which recording / reproduction can be performed in a shared manner, but it goes without saying that a shared configuration of only CD-DA and CD-ROM audio may be used. Provides a preliminary playback mode,
This prevents a read error due to a read error of the OC information or the information portion of the track. If the read reliability is secured, it is not necessary to intentionally provide a preliminary play mode.

Next, a second embodiment of the present invention will be described with reference to FIGS. This second embodiment differs from the first embodiment of FIGS. 1 and 2 in the following points. That is, the first reference example is a CD-DA, a CD-ROM audio, a CD-R
While the OM can be shared, the second reference example is a CD-ROM.
The configuration is such that DA, CD-ROM audio, and VCD can be shared.

Here, considering the VCD, VC
D is compatible with the existing CD-IFMV, and the data of the entire disc is stored in a CD-ROM (X
A) Format In compliance with Form 1, file management is performed according to the ISO9660 format. FIG. 5 is a diagram showing a track configuration according to the VCD standard, and FIG. 6 is a sector format diagram of a video sector according to the VCD standard. FIG. 7 is a diagram showing a sector format of an audio sector according to the VCD standard, and FIG. 8 is a diagram showing an interleaved recording of an audio sector and a video sector according to the VCD standard.

In the second reference example, a CD-DA, a CD-ROM
There are the following changes in the configuration of the signal processing circuit 11 so that the audio and VCD can be shared. In the first reference example, the switch circuit 28 switches the orthogonal transform / Huffman code decoder 26 between a decode mode and a through-pass mode. However, an MPEG decoder 29 responding to the output of the switch circuit 24 is further provided. When 28 is connected to the j side, MP
The output signal of the EG decoder 29 is selected. The CPU 14 controls each switch circuit according to a program prepared in advance to perform such an operation.

The operation of the second embodiment will be described with reference to the flowchart of FIG. 14, but only the steps different from those of the flowchart of FIG. 2 will be described. Step S17 in FIG.
Instead, in step S17A, it is determined whether a VCD code exists. After step S18, steps S19 to S22 similar to steps S10 to S13 are executed. However, the second track is reproduced in step S20, and the MPEG decoder 2 is reproduced in step S21.
9 to check the result of MPEG decoding. Step S
If the decoded data is not normal in step S22, step S26
To indicate that playback is not possible. If the decrypted data is normal,
In step S23A, the VCD flag is turned on, and in step S24A, control is performed so that the switch circuit 28 is connected to the j side. As a result, the VCD is reproduced in step S25A.

Next, a third reference example of the present invention will be described with reference to FIG.
This will be described with reference to FIG. The third reference example is the orthogonal transform / Huffman code encoder 25 of the first reference example of FIG.
The Huffman code decoder 26 is changed to an orthogonal transform encoder 25A and an orthogonal transform decoder 26A, respectively. That is, the CD-ROM audio to be reproduced is as shown in FIG.
This reference example is applied to the optical disc 1 recorded by applying the signal processing circuit shown in FIG. Therefore, the flowchart of FIG. 16 is replaced with step S16 of FIG. 2 and is step S16A of performing orthogonal transform decoding after CD-ROM (XA) decoding.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. The fourth embodiment has a configuration that can be used for CD-DA, CD-ROM audio, and VCD similarly to the second embodiment, and similarly to the third embodiment, an orthogonal transform encoder 25A and an orthogonal transform decoder 26.
A is used. Therefore, the CD-RO to be reproduced
This reference example is applied to the optical disc 1 in which M audio is recorded by applying the signal processing circuit shown in FIG. 11 to FIG. Therefore, the flowchart of FIG. 18 is different from the CD-ROM of FIG.
(XA) Step S16A of performing orthogonal transform decoding after decoding
It has become.

Next, a fifth reference example of the present invention will be described with reference to FIG.
This will be described with reference to FIG. In the fifth reference example, the orthogonal transform / Huffman code encoder 25 of the first reference example of FIG.
The Huffman code decoder 26 is changed to a Huffman code encoder 25B and a Huffman code decoder 26B, respectively. That is, this reference example is applied to an optical disc 1 in which CD-ROM audio to be reproduced is recorded by applying the signal processing circuit shown in FIG. 12 to FIG.
Therefore, the flowchart of FIG. 20 is replaced with step S16B of FIG. 2 in which the Huffman code decoding is performed after CD-ROM (XA) decoding.

Next, a sixth embodiment of the present invention will be described with reference to FIGS. The sixth embodiment has a configuration which can be used for CD-DA, CD-ROM audio, and VCD similarly to the second embodiment, and uses a Huffman code encoder 25B and a Huffman code decoder 26B like the fifth embodiment. I have. Therefore, C to play
This reference example is applied to the optical disc 1 in which the D-ROM audio is recorded by applying the signal processing circuit shown in FIG. 12 to FIG. Therefore, the flowchart of FIG. 22 replaces the step S16 of FIG.
This is step S16B of performing Huffman code decoding after ROM (XA) decoding.

Next, the seventh embodiment of the present invention will be described with reference to FIGS.
Reference examples to twelfth reference examples will be described. These seventh
The reference examples to the twelfth reference examples are basically the first to sixth reference examples.
Although corresponding to the reference example, the following points are different. In the first to sixth reference examples, whether the TOC has been read or not, and if the TOC has been read, the control bit Q1
CD-D depending on whether .about.Q4 is "0100" or not.
A is determined whether it is A or CD-ROM. In the seventh to twelfth reference examples, the sync (synchronization) at the head of the data block
Whether the signal is a CD-DA or a CD-ROM is determined based on the presence or absence of a signal. As can be seen from FIG. 23, the CD-ROM
In the case of, there is a 12-byte sync signal (SYNC) at the beginning regardless of the difference such as the mode. This sync signal has a configuration unique to a CD-ROM. Specifically, the first byte (byte number 0) and the last byte (byte number 11) are “00000000”, and 10 bytes therebetween.
Bytes (byte numbers 1 to 10) are "1111111"
1 ". On the other hand, in the case of CD-DA, one frame (5
11T-1 of 24 bits per 88 channel bits)
1T synchronization signal, ie, “100000000001”
000000000010 ". Therefore, as seen from FIG. 23, when viewed as a data block, a predetermined synchronization signal does not always exist at the head of each data block. If the signal is detected, it is possible to determine whether the disc is a CD-DA disc or a CD-ROM disc.

A technique for judging the type of a disc by detecting a sync signal at the head of a data block is described in Japanese Patent Publication No. 7-70150.
In this embodiment, utilizing this technique, the sync signal at the head of the data block is currently set in the mounting portion based on whether or not the sync signal has a configuration unique to a CD-ROM disc. It is determined whether the disc is a CD-ROM disc or a CD-DA disc. Hereinafter, the process of this determination will be described in detail.

First, when a CD-ROM disk is set in the mounting section as a disk, the optical pickup 3 is driven to move to the head position of data under the control of the CPU 17. When the spindle motor 2 reaches a predetermined number of rotations, the optical pickup 3 reads the portion of the sync signal "SYNC" in the data block shown in FIG. This sync signal is sent to the CPU via the RF amplifier 7, the reproduction decoder 8, and the signal processing circuit 11.
14 is input. The CPU 14 compares this signal with a sync signal of a predetermined pattern stored in an internal memory. If the signal matches, the CPU 14 determines that the disc is a CD-ROM disc, and notifies the CPU 17 of the result.

Next, when a CD-DA disk is set in the mounting section as a disk, a signal at the head of data is read by the optical pickup 3 in the same manner as described above. Then, the signal is compared with a sync signal of a predetermined pattern similar to the above by the CPU 14, and it is determined that they are not the same. As described above, in the present embodiment, it is possible to determine whether or not the disc is a CD-ROM using the synchronization signal at the head of the data block. In the flowcharts of FIGS. 24 to 29, in step S30, it is determined whether or not the disc is a CD-ROM based on the sync signal. In the seventh to twelfth reference examples shown in each of these flowcharts, the CD-R
OM is determined first, and after that, the same method as in the first to sixth reference examples is used.
A, dual-purpose reproduction of CD-ROM audio and CD-ROM and dual-purpose reproduction of CD-DA, CD-ROM audio and VCD can be performed.

The check data (track 1) is reproduced (S11), and the decoded result is compared and checked with the prepared data (track 1). By using such confirmation means, it is possible to prevent a reproduction error due to a reading error of the TOC information or the information portion of the track,
The reliability of the optical disc device can be improved. It enables the CD-ROM audio of the new standard and the conventional CD-DA to be shared and reproduced. Further, by using the confirmation means, it is possible to prevent a reproduction error due to a reading error of the TOC information or the information portion of the track, thereby improving the reliability of the optical disk device. Furthermore, CD-R
Shared playback of MPEG-compressed VCDs belonging to the OM standard can also be brought into view.

Next, thirteenth to twentieth embodiments of the present invention will be described. The thirteenth reference example to the eighteenth reference example are:
These are also modified examples of the first to sixth reference examples (also modified examples of the seventh to twelfth reference examples), and differ from these reference examples in the following points. 2, 14, 16, 18, and 2 showing the first to sixth reference examples, respectively.
0 and TOC in each flowchart of FIG. 22 to determine whether the loaded disc is a CD-DA or a CD-ROM.
Of the seventh reference example to the twelfth
In each of the flowcharts of FIGS. 24 to 29 showing reference examples, the loaded disk is a CD-DA or a CD-ROM.
In order to determine whether or not there is a synchronization signal at the head of each data block, and its configuration are determined. However, even in the case of a disk drive, CD-DA is not targeted, and CD-RO
M audio and CD-ROM compatible (compatible) player and CD-ROM audio and VCD compatible (compatible)
It can also be configured as a regenerator.

Accordingly, in the thirteenth to eighteenth embodiments, steps S2, S2A, S3 to S6 in FIGS. 2, 14, 16, 18, 20, and 22 are deleted,
It is configured to go directly from step S1 to step S7. The nineteenth reference example shown in FIGS.
4. The twentieth reference example shown in FIG.
8 has three modes of an orthogonal transform decoder and a Huffman code decoder as a decompression decoder, an orthogonal transform decoder, and a Huffman code decoder. The circuit is provided with a through-pass mode. That is, in the reference example, three modes are provided, type 1 is set to orthogonal transform for each type of CD-ROM, type 2 is set to orthogonal transform + Huffman code, and type 3 is set to Huffman code.

In FIG. 30, when the terminal h1 of the switch circuit 27A is selected, the compression encoder 25C performs compression by type 1 orthogonal transform, and when the terminal h2 is selected, the type 2 orthogonal transform + compression by Huffman code. Is performed, and when the terminal h3 is selected, compression by the type 3 Huffman code is performed. As a specific configuration, the circuits in FIGS. 10 to 12 can be switched and used. When the terminal c1 of the switch circuit 28A is selected, the expansion decoder 26A performs expansion by type 1 orthogonal transform, and when the terminal c2 is selected, performs expansion by type 2 orthogonal transform + Huffman code, and performs a terminal c3 Is selected, the extension by the type 3 Huffman code is performed. A specific configuration of the decompression decoder 26C is, for example, a combination of an orthogonal transform decoder 43 and two Huffman code decoders 42 and 44 as shown in FIG. When the CD-DA is not targeted, the other switch circuits 23 and 24 shown in FIG.
(XA FORMAT) through-pass circuit of encoder 21, CD-ROM (XA FORMAT) decoder 22
Is unnecessary.

The differences between the flowchart of FIG. 32 and FIG. 2 will be described. Step S8 to Step S
The process goes to step S50, but in step S50, one of type 1, type 2, type 3 or linear (non-conversion) is determined, and the switch circuit 28A is switched in step S51 according to the result. Specifically, for type 1, the orthogonal transform decoder mode (terminal C1) is used. For type 2, the cascade connection mode of the orthogonal transform decoder and the Huffman code decoder (terminal C2) is used. For type 3, the Huffman code decoder mode (terminal C3) is used. Select Further, in the case of a disc on which a linear PCM signal that does not compress data is recorded on a CD-ROM, the CD-ROM is not a CD-ROM audio but a C-ROM.
D-ROM (YE in step S11 in FIG. 32)
S), in step S14, the switch circuit 28A is switched to the terminal d, and the expansion decoder 26C enters the through-pass mode.

The twentieth reference example in FIGS. 33 and 34 is a CD-RO
It has a function of reproducing both M audio and VCD. An MPEG decoder 29 for reproducing a VCD is provided, and is switched and output by a switch circuit 28A.
When the terminal d of the switch circuit 28A is selected in step S51A in the flowchart of FIG.
At 52A, a through-pass mode is set. The other processing is the same as that of the related reference example, and the description is omitted. Therefore, according to the twentieth embodiment, a dual-purpose playback device for CD-ROM audio and video CD is provided.

In each of the above embodiments, the switch circuit 28 or 28A is provided on the output side of the orthogonal transform / Huffman decoder 26, the orthogonal transform decoder 26A, the Huffman decoder 26B, and the expansion decoder 26C, respectively. Depending on the configuration, it may be provided on the input side,
The internal connection of the decoder itself can be switched, and with such a configuration, a duplicated circuit can be excluded from the configuration of FIG. Further, in each of the above reference examples, the output analog system circuit 12 and the input analog system circuit 13 are provided with a switching means of the sampling frequency fs, and the sampling frequency fs is set to 44.1 kHz.
And 88.2 kHz, it is possible to select a desired fs for the recording reference example and to match the fs at the time of recording on the optical disc 1 at the time of reproduction.

In each of the above embodiments, the optical disk 1 is a phase-change disk because it is an optical disk device capable of recording / reproducing. However, it is needless to say that the optical disk 1 may be a read-only optical disk.
Further, in the case of a magneto-optical disk, a CD-DA, a CD-ROM audio, a CD-ROM
-The shared reproduction of the ROM can be performed.

Next, embodiments (first to twentieth embodiments) of an optical disk apparatus capable of performing shared reproduction of CD-DA, DVD audio and DVD in addition to the above-described reference examples will be described. FIG. 35 is a schematic data arrangement diagram showing a DVD format in sector units. As shown in FIG. 35, in a DVD, one pack is usually composed of 2048 bytes (one logical sector), and 2034 bytes of a packet (user data) in the pack can be used. In FIG. 35,
“Pack start” has a SYNC pattern serving as a synchronization signal, “SCR” is a system clock reference as time information, “Mux rate” is a transfer rate (multiple rate), and “packet (user data). ) "Includes a packet header and data.

The first to twentieth embodiments can be configured by adding the following changes to the first to twentieth embodiments described above. That is, the CD-ROM (XA FORMAT) encoder 21 and the CD-ROM (XAFORMAT) decoder 2 of the signal processing circuit 11 of FIG.
2 may be replaced with a DVD encoder (packing encoder) and a DVD decoder (unpacking decoder), respectively, and step S17 in FIG.
"DVD code" instead of "code"
A change may be made such as using a “DVD flag” instead of the “CD-ROM flag” of No. 23. Also, “C” in FIG.
The “D-ROM encoding circuit 34” is referred to as a “DVD encoding circuit”. Similarly, changes may be made to FIGS. 13 to 22 and FIGS. 14, FIG. 18, FIG. 22, FIG.
5, “MPEG code” may be used instead of “VCD code” in FIG. 27, FIG. 29, FIG. First
In Examples 20 to 20, "CD-RO" of Reference Examples 1 to 20 was used.
M audio ”is“ DVD audio ”and“ CD-
By setting “ROM” to “DVD”, the DVD version of the first to twentieth reference examples can be obtained. CD-D
In consideration of the difference between the thicknesses of the layers constituting the disc, A and DVD require a dual-purpose device such as a two-focus type or two-lens switching type optical head for performing focus servo control and tracking servo control. Needless to say, measures must be taken.

In the above embodiment, the presence of the TOC or the control bit of the TOC is detected for discriminating the CD-DA and other disks.
D audio has a disc thickness of 1.2 mm and C
D-DA, CD-ROM, CD-ROM audio, V
It is twice as thick as a CD. Due to the difference in the physical characteristics, the disc type can be identified by the characteristics of the output of the optical pickup at the time of focus search or the like. Does not need to be detected or the control bit of the TOC is detected. Tables 2 and 3 below summarize the above Reference Examples and Examples.

[0061]

[Table 2]

[0062]

[Table 3]

The output analog circuit 12 and the input analog circuit 13 are provided with means for switching the sampling frequency fs in each of the above reference examples and embodiments.
If one of 8.2 kHz can be selected, a desired fs can be selected for the recording reference example, and can match the fs at the time of recording of the optical disc 1 at the time of reproduction.

In each of the above-described reference examples and embodiments, the optical disk device is a phase-change disk because the optical disk device is capable of recording / reproducing. However, it is needless to say that the optical disk 1 may be a read-only optical disk. Also, by simply changing the optical head 3 and the laser driving unit 9 of the apparatus to the magneto-optical system, it is possible to perform the common reproduction of the CD-DA, the CD-ROM audio and the CD-ROM in the same procedure.

[0065]

As described above, the present invention is characterized by a method for recording on an optical disc having a pack including information for specifying a DVD audio disc, which is a DVD dedicated to audio, and audio data.
It is characterized in that it is quantized with the number of bits exceeding 16 bits and fs of 88.2 kHz, and an encoding ID for specifying an encoding method is arranged and recorded in a subheader provided in user data of a pack for each sector. In addition, the present invention has a feature in a device that reproduces the information using the information.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first reference example of the optical disk device of the present invention.

FIG. 2 is a flowchart showing an operation procedure in a reproduction mode of the first reference example.

FIG. 3 is a diagram illustrating a frame structure of a Q channel of TOC information of a CD.

FIG. 4 is a diagram showing the data structure of the entire disc according to the VCD standard.

FIG. 5 is a diagram showing a track configuration according to the VCD standard.

FIG. 6 is a sector format diagram of a video sector in the VCD standard.

FIG. 7 is a diagram showing a sector format of an audio sector in the VCD standard.

FIG. 8 is a diagram of interleaved recording of an audio sector and a video sector in the VCD standard.

FIG. 9 is a block diagram of a recording apparatus according to the prior application of the present applicant.

FIG. 10 is a block diagram showing an example of a signal processing circuit in the recording apparatus of the prior application.

FIG. 11 is a block diagram showing an example of a signal processing circuit in a recording apparatus of another prior application filed by the present applicant.

FIG. 12 is a block diagram showing an example of a signal processing circuit in a recording apparatus of yet another prior application filed by the present applicant.

FIG. 13 is a block diagram showing a second reference example of the optical disk device of the present invention.

FIG. 14 is a flowchart showing an operation procedure in a reproduction mode of the second reference example.

FIG. 15 is a block diagram showing a third reference example of the optical disc device of the present invention.

FIG. 16 is a flowchart showing an operation procedure in a reproduction mode of the third reference example.

FIG. 17 is a block diagram showing a fourth reference example of the optical disk device of the present invention.

FIG. 18 is a flowchart showing an operation procedure in a reproduction mode of the fourth reference example.

FIG. 19 is a block diagram showing a fifth reference example of the optical disk device of the present invention.

FIG. 20 is a flowchart illustrating an operation procedure in a reproduction mode according to a fifth reference example;

FIG. 21 is a block diagram showing a sixth reference example of the optical disc device of the present invention.

FIG. 22 is a flowchart showing an operation procedure in a reproduction mode of the sixth reference example.

FIG. 23 is a schematic diagram of a data arrangement showing various formats of a CD in sector units.

FIG. 24 is a flowchart showing an operation procedure in a reproduction mode of a seventh reference example of the optical disc device of the present invention.

FIG. 25 is a flowchart showing an operation procedure in a reproduction mode of the eighth embodiment of the optical disc apparatus of the present invention.

FIG. 26 is a flowchart showing an operation procedure in a reproduction mode of a ninth reference example of the optical disc device of the present invention.

FIG. 27 is a flowchart showing an operation procedure in a reproduction mode of the tenth reference example of the optical disc apparatus of the present invention.

FIG. 28 is a flowchart showing an operation procedure in a reproduction mode of the eleventh reference example of the optical disc device of the present invention.

FIG. 29 is a flowchart showing an operation procedure in a reproduction mode of the twelfth reference example of the optical disc device of the present invention.

FIG. 30 is a block diagram showing a nineteenth reference example of the optical disc device of the present invention.

FIG. 31 is a block diagram illustrating a configuration example of a decompression decoder in FIG. 30;

FIG. 32 is a flowchart showing an operation procedure in a reproduction mode of the nineteenth reference example.

FIG. 33 is a block diagram showing a twentieth reference example of the optical disc device of the present invention.

FIG. 34 is a flowchart showing an operation procedure in a reproduction mode of the twentieth reference example.

FIG. 35 is a schematic data arrangement diagram showing a DVD format in sector units.

[Explanation of symbols]

Reference Signs List 1 optical disk 2 spindle motor 3 optical head 4 spindle servo unit 5 focus / tracking servo unit 6 servo control circuit 7 RF amplifier 8 reproduction decoder 9 laser drive unit 10 recording encoder 11 signal processing circuit 12 output analog system circuit 13 input analog system Circuit 14 CPU (determination means, confirmation means, mode setting means) 15 operation unit 16 display unit 17 CPU 20 CD-DA signal processing unit 21 CD-ROM encoder 22 CD-ROM decoders 23, 24, 27, 27A, 28, 28A Switch circuit 25 orthogonal transform / Huffman code encoder 25A orthogonal transform encoder 25B Huffman code encoder 25C compression encoder 26 orthogonal transform / Huffman code decoder 26A, 43 orthogonal transform decoder 26B, 42, 44 Huffman code decoder 26 Decompression decoder 29 MPEG decoder 31 A / D conversion circuit (quantization means) 32 Signal processing circuit (constituting data compression means together with memory 33) 33 Memory 34 CD-ROM coding circuit (formatting means) 35 CD coding circuit 36 Filter bank 37 Switch circuit (selection means) 38 Huffman encoding circuit 39 Allocation circuit 40 Orthogonal transformation circuit 41 Normalization / quantization unit IN Input terminals OUT1, OUT2 Output terminals

Claims (4)

[Claims] 1. A recording method for recording on an optical disc having information specifying that the disc is an audio-only DVD disc having a higher density than CD-DA, and a pack including audio data, wherein a user data area of the pack is The multi-channel audio signal has a quantization bit number exceeding the CD-DA quantization bit number of 16 and the CD-DA
Data that has been quantized at a sampling frequency of 88.2 kHz, which is twice the DA sampling frequency of 44.1 kHz, and is encoded by Huffman code or orthogonal transform / Huffman code is stored. An optical disc, which is formatted so as to be stored in a predetermined subheader of a user data area of each sector of the DVD as an encoding ID for specifying the DVD, and records the formatted data in a DVD format on an optical disc. How to record to. 2. An optical disc apparatus capable of reproducing information from an optical disc recorded by the recording method according to claim 1, wherein the orthogonal transform / Huffman code decoder or the Huffman code decoder is used depending on the encoding method. Means for supplying a reproduction signal and decoding the multi-channel audio signal. 3. A CD-DA and a DVD disc for audio only having a higher density than the CD-DA, wherein a multi-channel audio signal has a quantization bit number exceeding the quantization bit number 16 of the CD-DA. The CD-DA is quantized by a sampling frequency exceeding 44.1 kHz, encoded by an orthogonal transform / Huffman code, and encoded into the user data of a pack including a header and user data. This DVD is formatted so as to be stored in a predetermined sub-header of a user data area of each sector of the DVD as a coding ID for specifying the coding method in units of sectors, and this formatted The data is recorded in the DVD format, and the audio-only DVD disc is recorded. Audio-only DVD recorded with an identifiable code
An optical disc apparatus capable of reproducing information from two types of discs, comprising: a decoder for CIRC decoding responding to a signal read from a loaded optical disc; and a decoder for CIRC decoding. D responding to output signal
VD digital disk unpacking decoder; determining means for determining whether the type of the loaded optical disk is the audio-only DVD disk or CD-DA; output signal of the CIRC decoding decoder or the DVD disk unpacking decoder An orthogonal transform / Huffman code decoder responsive to the above, and when the discriminating means determines that the disc is an audio-only DVD disc, supplies an output signal of the unpacking decoder to the orthogonal transform / Huffman code decoder; and When the orthogonal transform / Huffman code decoder is set to the decode mode, and the discriminating means determines that the disc is a CD-DA,
An optical disc device comprising: mode setting means for setting the orthogonal transform / Huffman code decoder to pass through the decoder so as to output the output signal of the decoder for CIRC decoding. 4. A CD-DA and an audio-only DVD disk having a higher density than the CD-DA, wherein a multi-channel audio signal has a quantization bit number exceeding the quantization bit number 16 of the CD-DA. The CD-DA is quantized by a sampling frequency exceeding 44.1 kHz and encoded by a Huffman code, and the encoded data is converted to the user data in a pack including a header and user data. The DVD is stored as a coding ID for specifying the coding method on a sector basis so as to be stored in a predetermined sub-header of a user data area of each sector of the DVD, and the formatted data is stored in the DVD. Recorded as a format and identifiable as the audio-only DVD disc Audio-only DVD disc recorded with various codes,
An optical disc apparatus capable of reproducing information from two types of discs, comprising: a decoder for CIRC decoding responding to a signal read from a loaded optical disc; and an output signal of the decoder for CIRC decoding. D to respond
A VD disc unpacking decoder; a discriminating means for discriminating whether the type of the loaded optical disc is the audio-only DVD disc or the CD-DA; and a decoder for the CIRC decoding or an output signal of the DVD disc unpacking decoder. A responding Huffman code decoder, and when the discriminating means determines that the disc is an audio-only DVD disk, supplying an output signal of the unpacking decoder to the Huffman code decoder, and setting the Huffman code decoder to a decode mode. When the discriminating means determines that the disc is a CD-DA,
An optical disc device comprising: mode setting means for setting the Huffman code decoder to pass through so as to output the output signal of the decoder for CIRC decoding.