JP2000156033A - Reproduction apparatus and method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In a dual-purpose playback device for an HD disk and a CD, convenience is maintained during CD playback, and the convenience is lost during HD disk playback. SOLUTION: An additional information detection processing section 8 separates additional information from a data string including a 1-bit digital audio signal, detects time information TCP from header information in the data string, and sends it to a sub-data conversion generation section 9. . Also, of the additional information, track start time information such as track start time code and index start time code and index start time information are extracted from the management information before and after the data string, and stored in the memory unit 10. Sub-data conversion generator 9
Uses the time information TCP and the track start time information and index start time information stored in the memory unit 10 to convert and generate sub-data such as channel status and user data that can conform to the digital interface standard for CDs. I do.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a first digital signal in which additional information such as a song number and an elapsed time is transmitted beforehand along with main data, and an absolute time is transmitted along with main data. The present invention relates to a reproducing apparatus and a reproducing method capable of transmitting a second digital signal over a common digital interface.

[0002]

2. Description of the Related Art In addition to digital audio data as main data, channel status data including a category code for specifying a CD category and the like, and digital audio interface output of an existing compact disk player, and CD
User data consisting of a Q code and the like including information such as the track number and elapsed time of the user.

On the other hand, digital audio tape (DA)
T), an existing digital recording device using a mini disc (MD) or the like as a recording medium, when receiving data from a CD player via the digital audio interface, specifying a CD category by decoding channel status data; Based on detection of sub-data information such as the track number of CD and elapsed time by decoding the Q code of user data, recording of start ID, recording of track number, etc. are automatically executed on a recording medium, thereby improving convenience. There are many things that are increasing.

Recently, as a new optical disk different from a conventional CD, an optical disk standard recording a high-speed 1-bit digital audio signal has been proposed. The audio data handled in the above standard is a 1-bit audio signal obtained by performing a delta-sigma (ΔΣ) modulation process on an analog audio signal. This is a high-speed 1-bit audio signal sampled at a 64 times higher sampling frequency than the normal CD sampling frequency of 44.1 kHz. Very high sampling frequencies and quantization bits are represented by very short data word lengths, and feature a wide transmittable frequency band. Further, even with a 1-bit signal by ΔΣ modulation, a high dynamic range can be secured in an audio band that is low with respect to an oversampling frequency of 64 times.

The high-speed 1-bit audio signal has been proposed as a new disk standard for digital audio signals that far exceeds the audio characteristics of existing CDs. Information data such as the above track number and elapsed time is recorded in a form completely incompatible with a conventional CD.

Therefore, in a digital audio signal disc reproducing apparatus of a new standard, when configuring a digital audio interface output, generally, category codes of channel status data,
The data structure of user data must be newly defined and operated.

[0007]

However, according to a new rule, when recording via a digital interface to an existing digital recorder, the recording of the start ID on the recording medium and the Convenience such as recording of numbers is completely impaired.

[0008] In particular, in a dual-purpose playback apparatus for digital audio discs of a new standard and an existing CD, the above-mentioned convenience is maintained at the time of playing a CD, and is impaired at the time of playing a new disc. Great inconvenience,
This can be confusing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances. Even when a digital audio signal disc recorded in a new system different from a CD is reproduced, channel status data and user data in the same format as the CD are reproduced. Can be used as a digital audio interface output. When recording on a digital recording device such as a DAT or mini disk, the convenience of automatically recording a start ID and a track number on a recording medium is equal to that of a conventional CD. It is an object of the present invention to provide a reproducing apparatus and method capable of securing the same.

[0010] In particular, in a reproducing apparatus which is compatible with a digital audio disc of a new standard and an existing CD, channel status data and user data of the same format as that of a CD are reproduced by a digital audio interface during reproduction of any of a plurality of types of discs. It is an object of the present invention to provide a reproducing apparatus and method capable of outputting the information without causing confusion for the apparatus user.

[0011]

In order to solve the above-mentioned problems, a reproducing apparatus according to the present invention comprises at least a plurality of programs formatted in a first format, an elapsed address for each program, and a program number. A first recording medium having a program area in which sub-data to be recorded is recorded, and an absolute address accompanying a plurality of programs formatted in a second format different from the first format. Selectively select a second recording medium including a program area in which sub-data is recorded and a management area for managing a recording address represented by an absolute address corresponding to each program recorded in the program area. A playback device for playing back the management area and the program area of the second recording medium in a playback apparatus capable of being played back; Storage means for storing a recording address represented by an absolute address corresponding to each program recorded in the management area of the second recording medium reproduced by the reproduction means, and stored in the storage means The program number and the program number of the program currently being reproduced are based on the recording address represented by the absolute address corresponding to each program and the absolute address reproduced from the program area of the second recording medium by the reproducing means. A sub-data generating means for generating an address; and when reproducing the first recording medium, an elapsed address and a program number for each program reproduced from the program area of the first recording medium are inputted, and the second recording is performed. During reproduction of the medium, the progress address of the program currently being reproduced generated by the sub-data generating means is Characterized by comprising an interface output means for outputting program number is input into a predetermined digital interface.

According to another aspect of the present invention, there is provided a reproducing apparatus comprising: a plurality of programs formatted in a first format; and a sub-data comprising at least an elapsed address and a program number for each program. And a sub-data consisting of an absolute address is recorded in association with a plurality of programs formatted in a second format different from the first format. For reproducing a recording medium having a second layer having a program area for managing a recording address represented by an absolute address corresponding to each program recorded in the program area. In the apparatus, a program area of the first layer and a management area and a program area of the second layer are selected. A storage unit for storing a recording address represented by an absolute address corresponding to each program recorded in the management area of the second layer reproduced by the reproduction unit; The program currently being reproduced based on the recording address represented by the absolute address corresponding to each program stored in the storage means and the absolute address reproduced from the program area of the second layer by the reproducing means. Sub-data generating means for generating a program number and an elapsed address of the program; and, when reproducing the first layer, an elapsed address for each program reproduced from the program area of the first layer;
An interface to which a program number is input, and at the time of reproduction of the second layer, a progress address and a program number of a program currently being reproduced generated by the sub-data generating means are input, converted into a predetermined digital interface, and output. Output means.

[0013] In order to solve the above-mentioned problems, a reproducing method according to the present invention comprises a plurality of programs formatted in a first format, a progress address for each program,
A first recording medium having a program area in which sub-data composed of at least a program number is recorded, and a plurality of programs formatted in a second format different from the first format. And a management area for managing a recording address represented by an absolute address corresponding to each program recorded in the program area. In a reproducing method for selectively reproducing a medium, a step of reproducing a management area of the second recording medium corresponds to each program recorded in the reproduced management area of the second recording medium. Storing a recording address represented by an absolute address in a memory; and storing a program address in the second recording medium. Playing back, based on a recording address represented by an absolute address corresponding to each program stored in the memory and an absolute address reproduced from the program area of the second recording medium by the reproducing means, A sub-data generating step of generating a program number and an elapsed address of a program currently being reproduced; and an elapsed address for each program reproduced from a program area of the first recording medium when reproducing the first recording medium. Selecting a program number, selecting a progress address and a program number of a program currently being reproduced when the second recording medium is reproduced, converting the program into a predetermined digital interface, and outputting the converted digital interface. It is characterized by becoming.

According to another aspect of the present invention, there is provided a reproducing method, comprising: a plurality of programs formatted in a first format;
A first layer including a program area in which sub-data at least composed of a program number is recorded, and a plurality of programs formatted in a second format different from the first format. A second layer including a program area in which sub-data including an absolute address is recorded, and a management area that manages a recording address represented by an absolute address corresponding to each program recorded in the program area; Selectively reproducing the program area of the first layer, the management area and the program area of the second layer, and the reproduced second medium. The recording address expressed by the absolute address corresponding to each program recorded in the management area of the layer is stored in the memory. Step, a recording address represented by an absolute address corresponding to each program stored in the memory, and an absolute address reproduced from the program area of the second layer. Generating a program number and an elapsed address; and when reproducing the first layer, selecting an elapsed address and a program number for each program to be reproduced from the program area of the first layer; And generating a progress address and a program number of the program currently being reproduced at the time of reproduction, converting the program into a predetermined digital interface, and outputting the converted digital interface.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a reproducing apparatus and method according to the present invention will be described with reference to the drawings. This embodiment enables a multi-bit audio signal equivalent to an audio signal recorded on a compact disc to be reproduced and a high-speed 1-bit digital signal equivalent to a high-speed 1-bit digital audio signal recorded on a new optical disc described later. The present invention relates to a disc reproducing apparatus capable of reproducing a bit digital audio signal and outputting an audio signal based on a digital audio interface standard similar to a CD. After that, a new optical disc on which the high-speed 1-bit digital audio signal is recorded
(High Definition) disk.

The high-speed 1 recorded on the HD disk
The bit audio signal is obtained by subjecting an analog audio signal to delta-sigma (ΔΣ) modulation processing, and has a data word length of 1 bit and a sampling frequency of 2.824 MHz (44.1
KHz × 64).

FIG. 1 shows the configuration of the disk reproducing apparatus 1.
The optical disc 2 has a first layer (CD) in which a multi-bit digital audio signal of a conventional CD format is recorded.
Layer) and a second format in which a 1-bit digital audio signal of the HD format, which is a new format, is recorded this time.
This is a multi-layer disc having a layer (HD layer). In another embodiment, a conventional CD disk and an HD disk on which a 1-bit digital audio signal of a new HD format is recorded may be selectively mounted.

An optical pickup 3 from the optical disk 2
Are passed through the RF amplifier 4 and input to the physical signal detection processing unit 5.

When the optical disk 2 is an HD disk or HD layer, the physical signal detection processing section 5 performs physical signal processing such as EFM plus demodulation, product coding, and descrambling, and performs 64 times higher fs.
The 1-bit delta-sigma modulated digital audio signal (64 × 44.1 KHz = 2.8224 MHz) is sent to the audio signal processing unit 6 and the additional information detection processing unit 8.

When the optical disk 2 is a CD disk or a CD layer, the physical signal detection processing unit 5 performs EFM modulation and CIRC (Cross Interleave Read-Solomon Code).
ng) and physical signal processing such as fs (44.1
A digital audio signal having 16-bit quantization bits sampled at (KHz) is sent to the audio signal processing unit 11 and the additional information detection processing unit 12.

The audio signal processing section 6 reproduces 64 times the fs (64 × 44.1 KHz) reproduced from the optical disc 2.
= 2.8224 MHz), and demodulates the 1-bit audio signal sampled at a rate of 13.times.64 (64.times.44.1 KHz = 2.8224M) in the rate converter 13.
A 1-bit audio signal sampled at 1 Hz is down-converted to a multi-bit digital audio signal having a sampling frequency fs (Hz) equivalent to that of a CD and 16-bit quantization bits and supplied to one end of the first switch 14.

On the other hand, the audio signal processor 11 demodulates a 16-bit quantized digital audio signal sampled at fs (44.1 KHz) reproduced from the optical disk 2, and outputs the demodulated signal to a multi-terminal of the first switch 14. Supply.

The multi-bit digital signal selected by the first switch 14 is supplied to the interface output unit 7.

The digital audio interface output unit 7 converts a multi-bit digital signal into, for example, IEC
Output as a digital audio interface output conforming to the 958 format.

The additional information detection processing section 8 separates additional information other than the audio signal from the data string including the 1-bit digital audio signal, detects time information TCP described later from the header information in the data string, It is sent to the sub-data conversion generation unit 9. In addition, from the additional information, track start time information and index start time information such as a track start time code and an index start time code, which will be described later, are extracted from management information before and after the data string, and stored in the memory unit 10.

The sub-data conversion generation unit 9 uses the time information TCP supplied from the additional information detection processing unit 8 and the track start time information and the index start time information stored in the memory unit 10 to generate a CD. And sub-data such as channel status and user data that can conform to the digital interface standard for

The sub-data such as the channel status and the user data generated by the sub-data conversion generator 9 are supplied to one end of the second switch 15.

On the other hand, the additional information detection processing unit 12 separates additional information other than the audio signal from the data string including the multi-bit digital audio signal, and outputs channel information, user data, etc., which can comply with the digital interface standard for CD. The sub data is extracted and supplied to the other end of the switch 15.

The sub data such as the channel status data and the user data signal selected by the switch 15 are supplied to the digital audio interface output unit 7 and are output from the audio signal processing unit 6 or the audio signal processing unit 11. It is combined with a bit digital audio signal and output to the digital output terminal 17 in a format according to the digital audio interface standard.

The first switch 14 and the second switch 15 are switched based on a control signal output from a control unit 16 based on a discrimination result of a CD disk or an HD disc or a discrimination result of a CD layer or an HD layer. Controlled.

Here, sub-data to be converted and generated by the sub-data conversion generator 9 using additional information extracted from the 1-bit digital audio signal recorded on the optical disk 2, ie, channel status data according to the CD standard The user data will be described below.

In the CD standard, sub data (P, Q, R, S,
T, U, V, W). FIG. 2 shows a compact disc audio system (IEC (International El
3 shows a subcode configuration diagram of the (Ectrotechnical Commission) 908 standard). There are 98 sub-data P to W in one frame including the synchronization bits S ₀ and S ₁ for the synchronization pattern. P is information between tracks, R
ＷW is information such as still images and characters. The information converted and generated by the sub-data conversion generating unit 9 is Q including mainly information such as a track number, an elapsed time of each track, and an absolute time (minute, second, frame).

FIG. 3 shows the format of the Q code.
In 96 bits excluding the synchronization bits of S0 and S1, there are controls indicating presence / absence of emphasis and copy inhibition / permission.
CONTROL is 4 bits, address ADR indicating data mode is 4 bits, Q data is 72 bits, CR for parity generation
16 bits of C (Cyclic Redundancy Check) are included. During reproduction of the program area, the address ADR becomes 1.

FIG. 4 shows the structure of Q data when the address ADR is 1. Track number TNO, index number X,
Track elapsed time (min MIN, sec SEC, frame FRAME),
It consists of the absolute time from the beginning of the disc (minute AMIN, second ASEC, frame AFRAME) and CRC. The track elapsed time indicates an elapsed time for each track number.

FIG. 5 shows a subframe format in the digital audio interface (IEC958 standard) standard. FIG. 6 shows a frame format including the subframes shown in FIG.
One block is formed by gathering 192 frames composed of two subframes.

For each frame, in addition to the left channel and right channel audio data, a synchronization preamble (Sync P
reamble), user data (U bit), channel status data (C bit), and the like.

FIG. 7 shows a format of the channel status data. Category code (Ca
Tegory Code), sampling frequency fs, control (Control) indicating presence / absence of emphasis, and the like.

The category code shown in FIG.
FIG. 8 shows an example of the format of the user data when the source category is 0000 ", and the source category is a CD category indicating that the source is transmitted from a CD reproducing apparatus.
Shown in Here, the codes of Q to W excluding P are carried, and in particular, 96-bit Q is extracted.

FIGS. 9 and 10 show examples of user data (U), channel status data (C), etc. output together with actual audio data.

As described above, in the digital output of the CD player, the channel status is included in the CD category, and information such as the track number and the track elapsed time is included in the user data.

On the other hand, according to the HD standard, a start address corresponding to an absolute time of a track start in the audio area is written in a track list Track_List_2 in the area TOC data in the audio area Audio Area. The data that can be read during normal track reproduction is only the time code in the head header of each audio sector, which corresponds to the absolute time.

The configuration of the audio area on the HD disk according to the standard is shown in FIG. 11A, and the two areas TOC on both sides of the track area are configured as shown in FIG. 11B. In the track list Track_List_2 therein, as shown in the syntax of FIG.
Start_Time_Code is described. The index list Index_List of FIG. 11B describes the index start time code Index_Start_TC of each index number as shown in the syntax of FIG.

On the other hand, each track shown in FIG. 11C in the track area shown in FIG.
(D) is provided, and a frame info Frame_Info section is described in the audio header Audio Heder in the audio sector as shown in the syntax of FIG. 14. Time code Time_C for each frame as shown in
ode is described.

As described above, in the HD disk standard, unlike the CD format, the information that can be read during normal audio reproduction in the track area, which is the program area, is about the time code (ie, absolute time) of each frame. , Track number, track elapsed time, etc. are not recorded. Therefore, it is difficult to output the user data of the digital interface as it is, similarly to a CD.

Therefore, when reproducing the new optical disk 2, the disk reproducing apparatus 1 first reads area TOC (Table of Content) data when loading the disk and stores it in the memory unit 8 of FIG. As shown in FIG. 16, a table of a track list 2 (TRACK LIST2) and a table of an index list INDEX LIST are stored in the memory unit 8.

Now, in order to reproduce the optical disk 2 and to add user data (U bit) equivalent to a CD to the digital output, the Q data as shown in FIG. 17 is converted by the sub-data conversion generator 9 in FIG. Must be created.

The sub data conversion process will be described below with reference to FIG. First, a time code (current absolute time) of each frame of the audio header portion is read during reproduction of the optical disk 2, and this is defined as TCP. Then, in step S1, the TCP is set to the absolute time TCA (minute M,
Write in seconds S, frame F).

Next, at step S2, the track number 2 (T
NO. 2) Track start time code of the track
Track_Start_Time_Code (TC2) is compared with the TCP. Here, if TCP is smaller than TC2, the process proceeds to step S3, and the current track number TNO is set to "1". In step S4, the track number TNO. Elapsed time TCN by subtracting TC1 of 1
(Minutes, seconds, frames).

When the step S4 is completed, the processing shifts to the processing of * 1 surrounded by a broken line. This processing is performed for the track number T
NO. This is a process of determining an index number (IDX) in the “1”.

In step S5, the index list Index_
List track number TNO. Index INDE in 1
The Index_Start_TC of X2 is compared with the TCP. Here, the TCP is Index_Start_TC of the index INDEX2.
If it is smaller, the process proceeds to step S6, and the index number is determined to be "1". If the TCP is
Is larger than Index_Start_TC of the index INDEX2, the process proceeds to step S7, where the track number TNO. Compare the above-mentioned TCP with Index_Start_TC of the index INDEX3 in No. 1. Here, the above TCP is index INDEX3
If it is smaller than Index_Start_TC, the process proceeds to step S8, and the index number is determined to be “2”. If it is determined in step S7 that the TCP is Index_Start of the index INDEX3,
_TC, the process proceeds to step S9, where the track number TNO. Index_Start of index INDEXM in 1
_TC and the above TCP are compared. Here, if the TCP is smaller than Index_Start_TC of the index INDEXM, the process proceeds to step S10, and the index number is determined to be “M−1”. If the above TCP is larger than Index_Start_TC of the index INDEXM in step S9, step S9 is executed.
11 and the track number TNO. 1 is compared with Index_Start_TC of the index INDEXM and the above TCP. Here, the TCP is Ind of the index INDEXM + 1.
If smaller than ex_Start_TC, proceed to step S12,
The index number is determined to be “M”.

Returning to step S2, if the TCP is larger than the TC2 in step S2, the process proceeds to step S2.
1 and the track start time code Track_Start_Time_Cod of the track of track number 3 (TNO. 3)
e (TC3) and the above TCP are compared. Where T
If CP is smaller than TC3, the process proceeds to step S22, and the current track number TNO is set to "2". Also,
In step S23, the track number TNO.
2, TC2 is subtracted to obtain the elapsed time TCN (minutes, seconds, frames).

When the step S23 is completed, the process moves to the process of * 2 surrounded by a broken line. This process is similar to the process of * 1 described above, and is performed by using the track number TNO. 2 is a process of determining an index number (IDX) in the second. Detailed description is omitted.

In step S31, if the TCP is smaller than the N-th TCN of the track number TNO, the flow advances to step S32 to set the current track number TNO to the (N-1) th. Then, in step S33, the track number TNO. The elapsed time TCN (minutes, seconds, frames) is obtained by subtracting TC (N-1) of (N-1).

When the above step S33 is completed, the process moves to the processing of * N-1 surrounded by a broken line. This processing is also performed in the above * 1
, The track number TNO. This is a process for determining an index number (IDX) in N-1. Detailed description is omitted.

At step S31, the track number TN
If the above TCP is larger than the Nth TCN of O, the process proceeds to step S41, where the track number N + 1 (TNO.N
+1) Track start time code Trac of the track
k_Start_Time_Code (TCN + 1) is compared with the TCP. Here, if TCP is smaller than TCN + 1, the process proceeds to step S42, where the current track number TN
O is set to “N”. In step S43, the TCP
From the track number TNO. The elapsed time TCN (minutes, seconds, frames) is obtained by subtracting N TCNs.

When step S43 is completed, the process moves to the processing of * N surrounded by a broken line. In this process, as in the process of * 1, the track number TNO. This is a process for determining an index number (IDX) in N. Detailed description is omitted.

In other words, the disc reproducing apparatus 1 uses the TCP read by the additional information detection processing unit 8 and the table of FIG. As shown, TCP is defined as absolute time TCA, and then track number TNO. Starting from 2,
Track start time code of each track and TCP
Compare with. Nth TC of track number TNO
If it is larger and smaller than the (N + 1) th TC, FIG.
Is N. The value obtained by subtracting the Nth TC of TNO from TCP is the track elapsed time TC in FIG.
N (minutes, seconds, frames). Further, the TNO. The N-th index start time code is compared with the TCP to determine the current index number (IDX). By performing the above-described conversion generation flow, the Q data shown in FIG. 17 can be created. In addition, control as shown in FIG.
Q data is completed by adding fixed value data such as CONTROL and address ADR.

In the example of the area TOC list shown in FIG. 16, if the current absolute time is 7 minutes 40 seconds 33 frames, the track number TNO is "2" and the elapsed time T
CN is 2 minutes, 10 seconds and 33 frames, and IDX is “2”.

This is shown in the flowchart of FIG. 18 and FIG.
9 will be described.

First, the TCP "7:40:33 frame" read by the additional information detection processing section 8 is written in the TCA of FIG. Next, the track start time code Track_Start_Time of the track of track number 2 (TNO. 2)
_Code (TC2) “5 minutes 30 seconds 00 frames” and the T
Compare with CP. Then, since TCP is larger than TC2, the process proceeds to step S21. Here, the track start time code Track_Start_Time_Code (TC3) of the track with the track number 3 (TNO. 3) is “11 minutes 40
The second TCP frame is compared with the above TCP.
Since TCP is smaller than TC3, the process proceeds to step S22, and the track number TNO is set to "2". Then, in step S23, TC2 is subtracted from TCP, and 2 minutes, 10 seconds, and 33 frames are set as the TCN, that is, the elapsed time of the track number 2.

Also, the TC of the index INDEX2 “1/6
0 second 00 frame ”and the above TCP, and
Since P is large, the TC of the index INDEX3 is set to 1/8
0 second 00 frame ”and the above TCP, and
Since P is small, the index number is set to “2”.

As described above, in the disc reproducing apparatus 1, when the additional information read from the optical disc 2 by the optical pickup 3 is converted into, for example, data equivalent to the Q code of the sub data of the CD, first, after loading the disc, the area TOC of the area TOC is firstly read. The data is read by the additional information detection processing unit 8 and stored in the memory unit 10. During normal track reproduction, the time code of the header portion is read by the additional information detection processing unit 8 while the area TO stored in the memory unit 10 is read.
The channel status and user data conversion / generation unit 9 compares and refers to the track list information in the C data.
To generate a user data Q code equivalent to a CD.

For this reason, in the existing digital recorder which receives the digital interface output via the output terminal 11, at the time of data reception, the CD category is identified by decoding the channel status data, and the CD is decoded by decoding the Q code of the user data. Sub-data information such as a track number and elapsed time is detected, and a start ID and a track number are automatically recorded on a recording medium so as to correspond to them, thereby improving convenience.

As an example, the elapsed time in a track corresponds to a value obtained by subtracting the start address of the N-th track in the track list from the time code address being reproduced.

The channel status data is often uniquely determined by its category or device setting. If the category code is fixed to CD, the sampling frequency is fixed to 44.1 KHz, and emphasis is fixed to off, channel status data as a new optical disk (HD disk) can be generated.

The procedure of the process according to the present invention will be described below with reference to FIG. Here, the optical disk 2
Is a multi-layer disc having a CD layer / HD layer.

In step S101, it is determined whether to reproduce the CD layer or the HD layer of the loaded optical disk 2. If it is determined in step S101 that reproduction of the CD layer has been instructed by the user, step S1
At 02, the TOC area of the CD layer is reproduced first, and the program area is accessed based on the TOC information to perform reproduction. Sub-data added to the digital audio signal, which is the main data reproduced from the program area in step S102, is extracted in step S103.

In step S104, control is performed to switch the first switch 14 and the second switch 15 of FIG. 1 to the CD side.

If it is determined in step S101 that reproduction of the HD layer has been instructed by the user, the area TOC area of the HD layer is reproduced first in step S105, and the area TOC information is transmitted in step S106. Store in memory. Based on the management information of the area TOC, the program area is accessed and reproduced in step S107. At step S108, the program number and elapsed address of the program that is currently being reproduced, based on the recording address represented by the absolute address corresponding to each program stored in the memory and the absolute address reproduced from the program area. Generate

In step S109, control is performed to switch the first switch 14 and the second switch 15 of FIG. 1 to the HD side.

In the above description of the flowchart, a multi-layer disc has been described. However, in the case of a CD disc or an HD disc, the discrimination in step S101 is merely changed from discrimination in the embodiment to disc discrimination.

With the method described above, it is possible to detect additional information of a new standard optical disk (HD disk), convert it to the same channel status and user data as a CD, generate the data, and output the digital audio interface. Become.

In the above embodiment, an example has been described in which a 16-bit multi-bit digital signal having a sampling frequency fs (Hz) of the conventional CD standard output from the digital interface output section is output and recorded on another recording medium. Are output from the audio signal output unit 6 of FIG.
Channel status data, user data signal, etc. output from the sub-data conversion generation unit 9 when recording a 1-bit audio signal sampled at double fs (64 × 44.1 KHz = 2.8224 MHz) on another recording medium. The music may be divided based on the sub-data.

In the disc reproducing apparatus 1, the CD
Alternatively, the present invention may be applied to the case of reproducing a hybrid disc in which a CD signal area and a high-speed 1-bit audio signal area are stacked, although an HD optical disc is reproduced. In either case, the audio signal reproduced from the CD layer and the high-speed 1-bit audio signal layer can be output in a format according to the digital audio interface standard, making it easy to record on a digital recorder such as a DAT or mini disk. it can.

[0075]

According to the present invention, at the time of reproducing a digital audio signal disc recorded in an HD different from a CD, after detecting additional information such as a track number and an elapsed time, the detected information is used as the C of the digital audio interface.
By converting and generating the channel status data and user data specified in D and outputting them to the digital interface, when recording on a digital recorder such as a DAT or mini-disc, start on a recording medium Conveniences such as automatic recording of IDs and track numbers can be secured.

[Brief description of the drawings]

FIG. 1 is a block diagram of a disc reproducing apparatus applied to the present invention.

FIG. 2 is a data structure diagram of a sub-coding frame format adapted to a conventional CD.

FIG. 3 is a diagram illustrating a frame data structure of Q data adapted to a conventional CD.

FIG. 4 is a diagram showing a frame data structure of Q data in a program area adapted to a conventional CD.

FIG. 5 is a data structure diagram of a subframe of the digital audio interface standard.

FIG. 6 is a data structure diagram of a frame of the digital audio interface standard.

FIG. 7 is a data structure diagram of a format of channel status data.

FIG. 8 is a data structure diagram of a format of user data when a category code of channel status data is a CD category.

FIG. 9 is a data structure diagram when a subframe of the digital audio interface standard is used as user data.

FIG. 10 is a data structure diagram when a digital audio interface standard subframe is used as channel status data.

FIG. 11 is a data structure diagram of an HD disk applicable to the present invention.

FIG. 12 is a diagram showing a data table recorded in a track list in area TOC data.

FIG. 13 is a diagram showing a data table recorded in an index list in area TOC data.

FIG. 14 is a diagram showing a data table of an audio header in an audio sector in each track.

FIG. 15 is a diagram showing a data table of frame information in an audio header in each track.

FIG. 16 is a diagram showing a specific table of a track list and an index list in the area TOC.

FIG. 17 is a data structure diagram of sub-Q data.

FIG. 18 is a diagram showing a flowchart of track number generation, index number generation, and elapsed time generation according to the present invention.

FIG. 19 is a data structure diagram showing track numbers, index numbers, and start times actually generated based on the table of FIG. 16;

FIG. 20 is a flowchart showing a procedure of processing according to the present invention.

[Explanation of symbols]

1 disk reproducing device, 2 new optical disks, 3 pickup, 4 RF amplifier, 5 physical signal processing unit,
6 audio signal processing unit, 7 interface output unit, 8 additional information detection processing unit, 9 sub-data conversion generation unit, 10 memory unit

Claims (12)

[Claims] 1. A first recording medium comprising: a plurality of programs formatted in a first format; and a program area in which sub-data including at least an elapsed address and a program number for each program are recorded. A program area in which sub-data consisting of an absolute address is recorded along with a plurality of programs formatted in a second format different from the first format, and a program recorded in the program area. In a reproducing apparatus capable of selectively reproducing a second recording medium comprising a management area for managing a recording address represented by an absolute address, the management area and the program area of the second recording medium are A reproducing means for reproducing, recorded in a management area of the second recording medium reproduced by the reproducing means. Storage means for storing a recording address represented by an absolute address corresponding to each program, and a recording address represented by an absolute address corresponding to each program stored in the storage means; A sub-data generating means for generating a program number and an elapsed address of a program currently being reproduced based on an absolute address reproduced from a program area of the second recording medium; A progress address and a program number for each program to be reproduced from the program area of the first recording medium are input, and a program currently reproduced by the sub-data generating means during reproduction of the second recording medium is generated. Address and program number are input and converted to the specified digital interface A playback device comprising: an interface output unit that outputs the data. 2. The first format according to claim 1, wherein the quantized bits sampled at the sampling frequency Fs (Hz) are digital signals composed of m (m ≧ 2 integer) bits. Playback device. 3. The second format is characterized in that a quantized bit sampled at n times (an integer of n ≧ 2) the sampling frequency Fs (Hz) is a digital signal consisting of one bit. The playback device according to claim 2. 4. The reproducing apparatus according to claim 1, further comprising conversion means for converting a program in the program area in the second format into a program in the first format. 5. The reproducing apparatus according to claim 1, wherein the predetermined digital interface conforms to IEC958 standard. 6. A first layer comprising: a plurality of programs formatted in a first format; and a program area in which sub-data comprising at least an elapsed address and a program number for each program are recorded. A program area in which sub-data consisting of an absolute address is recorded in association with a plurality of programs formatted in a second format different from the first format, and a program recorded in the program area. And a second layer having a management area for managing a recording address represented by an absolute address. A reproducing apparatus for reproducing a recording medium comprising: a first layer program area; a second layer program area; Reproducing means for selectively reproducing the management area and the program area of the layer, and the reproducing means reproduced by the reproducing means Storage means for storing a recording address represented by an absolute address corresponding to each program recorded in the management area of the second layer; and an absolute address corresponding to each program stored in the storage means. A sub-data generating means for generating a program number and an elapsed address of a program currently being reproduced, based on the recorded address and the absolute address reproduced from the program area of the second layer by the reproducing means; At the time of reproduction of the first layer, an elapsed address and a program number for each program reproduced from the program area of the first layer are input, and at the time of reproduction of the second layer, the current reproduction generated by the sub-data generation means is performed. Address and program number of the program that is performing A reproducing apparatus comprising: an interface output unit that performs conversion and output. 7. The first format according to claim 6, wherein the quantized bits sampled at the sampling frequency Fs (Hz) are digital signals consisting of m (m ≧ 2 integer) bits. Playback device. 8. The second format is characterized in that a quantized bit sampled at n times the sampling frequency Fs (Hz) (an integer of n ≧ 2) is a digital signal composed of one bit. The playback device according to claim 7. 9. The reproducing apparatus according to claim 6, further comprising conversion means for converting a program in the program area in the second format into a program in the first format. 10. The digital interface according to claim 6, wherein the predetermined digital interface conforms to the IEC958 standard.
The playback device as described in the above. 11. A first recording medium comprising: a plurality of programs formatted in a first format; and a program area in which sub-data comprising at least an elapsed address and a program number for each program are recorded. A program area in which sub-data consisting of an absolute address is recorded along with a plurality of programs formatted in a second format different from the first format, and a program recorded in the program area. A reproducing method for selectively reproducing a second recording medium comprising a management area for managing a recording address correspondingly represented by an absolute address; and a step of reproducing the management area of the second recording medium. Each program recorded in the management area of the reproduced second recording medium. Storing a recording address represented by an absolute address in a memory; reproducing a program area of the second recording medium; and representing an absolute address corresponding to each program stored in the memory. A sub-data generating step of generating a program number and an elapsed address of a program currently being reproduced based on a recording address and an absolute address reproduced from the program area of the second recording medium by the reproducing means; At the time of reproduction of the first recording medium, an elapsed address and a program number for each program to be reproduced are selected from the program area of the first recording medium, and the generated current reproduction is performed at the time of reproduction of the second recording medium. Select the progress address and program number of the program Reproducing method characterized by comprising a step for outputting converted to face. 12. A first layer comprising: a plurality of programs formatted in a first format; and a program area in which sub-data including at least an elapsed address and a program number for each program are recorded. A program area in which sub-data consisting of an absolute address is recorded in association with a plurality of programs formatted in a second format different from the first format, and a program recorded in the program area. And a second layer having a management area for managing a recording address represented by an absolute address. Selectively reproducing the management area and the program area of the second layer; Storing in a memory a recording address represented by an absolute address corresponding to each program recorded in the management area; and a recording address represented by an absolute address corresponding to each program stored in the memory. Generating a program number and an elapsed address of a program currently being reproduced based on the absolute address reproduced from the program area of the second layer; An elapsed address and a program number for each program to be reproduced from the program area of the layer are selected, and the elapsed address of the program currently being reproduced generated at the time of reproduction of the second layer,
Selecting a program number, converting the program number to a predetermined digital interface, and outputting the digital interface.