JP2000156050A - Reproducing device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reproducing device capable of converting/generating the channel status data and user data of the same form as a CD and displaying auxiliary information of a musical number and a track progressive time), etc., even when a disk for a digital audio signal recorded by a new system different from the CD is reproduced. SOLUTION: An additive information detective processing part 9 detects time information TCP from header information in a data line to send it to a sub-data conversion generation part 10. The sub-data conversion generation part 10 converts/generates the sub-data of the channel status data and the user data, etc., according to a digital interface standard related to the CD by using the time information TCP, track start time information and index start time information, and makes display the musical number and the track progressive time related to the digital audio signal recorded on an optical disk 2 on a monitor 12 based on the conversion output.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a program area to which an absolute address is assigned in advance and a management area in which an absolute start address of each program recorded in the program area is recorded in association with a program number. The present invention relates to a reproducing apparatus and a reproducing method for reproducing a recording medium provided.

[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
The user data (User data) including a Q code and the like including information such as a track number and an elapsed time of the data is output.

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.

[0006]

However, in a disc reproducing apparatus capable of reproducing both the above-mentioned CD and a disc on which a new high-speed 1-bit audio signal is recorded, the C
It is desired to display the track number and the track elapsed time of the audio signal from D and also display the track number and track elapsed time of the audio signal from the new disk, as described above. The new disc has a different recording arrangement of the sub data on the disc, so that there is a problem that it is difficult to display using the same display function.

The present invention has been made in view of the above-mentioned circumstances, and when reproducing a digital audio signal disc recorded in a new system different from a CD, the channel status data and user data in the same format as the CD are reproduced. To provide a reproducing apparatus and method capable of displaying auxiliary information such as a song number and an elapsed track time by converting and generating the same.

[0008]

According to the present invention, there is provided a reproducing apparatus comprising: a program area in which a plurality of programs to which absolute addresses are assigned are recorded;
In a reproducing apparatus for reproducing a recording medium provided with a management area in which a start address represented by an absolute address of each program recorded in the program area is managed in association with a program number, the management area of the recording medium; Reproducing means for reproducing the program area; storage means for storing a start address represented by an absolute address of each program included in the management area reproduced by the reproducing means in association with a program number; Comparing means for sequentially comparing the absolute address reproduced from the program area with the start address of each program associated with the program number stored in the storage means, based on the comparison result, A program number corresponding to the position on the program area being reproduced by the reproducing means is determined. Characterized by comprising a constant section.

According to another aspect of the present invention, there is provided a reproducing apparatus comprising: a program area in which a program number and an elapsed address for each program are recorded along with each program information; A first recording medium having a management area in which a start address represented by an absolute address of each of the designated programs is associated with a program number, and a plurality of programs to which absolute addresses are assigned are recorded. A second recording medium including a program area and a management area in which a start address represented by an absolute address of each program recorded in the program area is managed in association with a program number is selectively reproduced. A reproducing device for reproducing a management area and a program area of the selected recording medium in the reproducing apparatus; Storage means for storing a start address represented by an absolute address for each program included in the management area of the second recording medium reproduced and played back in association with a program number; Comparing means for sequentially comparing the absolute address reproduced from the program area of the recording medium with the start address of each program associated with the program number stored in the storage means; In the case of the first recording medium, a program number corresponding to a position on the program area being reproduced by the reproducing means is displayed based on a program number recorded in association with the program area, If the selected recording medium is the second recording medium, the reproducing means reproduces the data based on the comparison result of the comparing means. That it is characterized by comprising a display control means for displaying the program number corresponding to the position on the program area.

According to another aspect of the present invention, there is provided a reproducing apparatus, comprising: a program area in which a program number and an elapsed address for each program are recorded along with each program information; A first layer having a management area in which a start address represented by an absolute address of each set program is associated with a program number and managed, and a program in which a plurality of programs assigned with absolute addresses are recorded The first layer of the recording medium comprising a second layer having a storage area and a management area in which a start address represented by an absolute address of each program recorded in the program area is managed in association with a program number. In a reproducing apparatus for selectively reproducing a layer and a second layer, a management area and a program of the recording medium corresponding to the selected layer are provided. Storage means for reproducing a program area, and a storage for storing a start address represented by an absolute address for each program included in the management area of the second layer reproduced by the reproduction means in association with a program number. Means for sequentially comparing an absolute address reproduced from the program area of the second layer by the reproducing means with a start address for each program associated with a program number stored in the storage means. Comparing means, when the selected layer is the first layer, a position on the program area where the reproducing means is reproducing based on a program number recorded in association with the program area; A corresponding program number is displayed, and when the selected recording medium is the second layer, the reproduction program is performed based on the comparison result of the comparing means. There characterized by comprising a display control means for displaying the program number corresponding to the position on the program area that is playing.

According to another aspect of the present invention, there is provided a reproducing method, comprising: a program area in which a plurality of programs to which absolute addresses are assigned are recorded; and an absolute address of each program recorded in the program area. In a reproducing method for reproducing a recording medium including a management area in which a start address represented by a program number is managed in association with a program number, a step of reproducing the management area of the recording medium; Storing, in a memory, a start address represented by an absolute address of each program included in the memory, in association with a program number, reproducing the program area, and storing the absolute address reproduced from the program area and the memory Start address for each program associated with the program number stored in A step of sequentially comparing the scan, based on the comparison result in step of the comparison, characterized by comprising the step of displaying the program number corresponding to the program being currently reproduced.

[0012]

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.

According to this embodiment, a compact disk (CD) can be reproduced, and a new optical disk on which a high-speed 1-bit digital audio signal is recorded can be reproduced. The present invention relates to a disc reproducing apparatus capable of displaying a number and an elapsed time of the music. Thereafter, a new optical disc on which the high-speed 1-bit digital audio signal is recorded is transferred to an HD (High Def.
inition Disc).

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 signal read by the optical pickup 3 from the HD disk 2 passes through the RF amplifier 4 and is input to the physical signal detection processing unit 5. The physical signal detection processing unit 5 detects the recording pattern of the optical disk 2 and performs physical signal processing such as disk ramble, and performs 64 times the fs (64 × 44.1 KHz = 2) recorded on the optical disk 2. .8224MH
The high-speed 1-bit delta-sigma digital audio signal sampled in z) is sent to the audio signal processing unit 6 and the additional information detection processing unit 9.

The audio signal processing unit 6 includes the optical disk 2
Fs (64 × 44.1 KHz = 64 ×
The digital audio signal subjected to 1-bit delta sigma modulation (2.824 MHz) is down-converted into multi-bit data having a sampling frequency fs (Hz) equivalent to that of a CD and a quantization bit number of 16 bits. Supply.

The D / A converter 7 converts the multi-bit data into an analog audio signal and outputs the analog audio signal from an output terminal 8 to the outside.

The additional information detection processor 9 separates additional information other than the audio signal from the data string including the 1-bit digital audio signal. Specifically, time information TCP, which will be described later, is detected from the header information in the data string, and sent to the sub-data conversion generation unit 10. Also, of 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 in the data string and stored in the memory unit 11. .

The sub-data conversion and generation unit 10 uses the time information TCP supplied from the additional information detection processing unit 9 and the track start time information and index start time information stored in the memory unit 11 to generate a CD. It converts and generates sub data such as channel status and user data which can conform to the digital interface standard relating to the digital interface standard, and based on the converted output, displays on the monitor 12 music numbers and tracks related to digital audio signals recorded on the optical disc 2. Provides auxiliary information on elapsed time.

The monitor 12 includes a sub-data conversion generation unit 10
From the sub data such as the channel status data and the user data signal from the PC, a song number and a track elapsed time related to the digital audio signal recorded on the optical disc 2 are displayed.

Here, the sub data to be converted and generated by the sub data conversion and generation unit 10 using the additional information extracted from the 1-bit digital audio signal from the optical disk 2, that is, the channel status data according to the CD standard, the user The data will be described below.

According to 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 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 the format of a subframe 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 the 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, the digital output of the CD player includes information such as the channel status in the CD category, the track number, and the track elapsed time in the user data.

On the other hand, according to the new optical disc standard, the start address corresponding to the absolute time of the start of the track in the audio area is written in the 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.

FIG. 11A shows the configuration of the audio area on the new optical disk according to the standard.
The two areas TOC on both sides of the track area are shown in FIG.
1 (b), in which a track list Track_List_2 includes a track start time code Tr of each track as shown in the syntax of FIG.
ack_Start_Time_Code is described. FIG.
(B) of the index list Index_List includes FIG.
, An index start time code Indes_Start_TC of each index number is described.

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
Describes ode.

As described above, in the HD standard, unlike the CD format, information that can be read during normal audio reproduction in the track area, which is a program area, is:
It is about the time code of each frame (that is, absolute time), and information such as track number and track elapsed time is not recorded. Therefore, information such as the track number and the track elapsed time cannot be displayed as it is.

Therefore, when reproducing the optical disk 2, the disk reproducing apparatus 1 first reads area TOC (Table of Content) data when loading the disk,
Is stored in the memory unit 8. The table of the track list 2 (TRACKLIST2) and the index list INDEX LIST is stored in the memory unit 8 as shown in FIG.

Now, in order to reproduce the optical disk 2 and to add user data (U bit) equivalent to a CD to the digital output thereof, 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 process moves 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 1.

In step S5, the index list Inde
x_List track number TNO. Index at 1
Index_Start_TC of INDEX2 is compared with the above TCP.
Here, the TCP is Index_Sta of the index INDEX2.
If it is smaller than rt_TC, the process proceeds to step S6, and the index number is determined to be "1". If it is determined in step S5 that the TCP is larger than Index_Start_TC of the index INDEX2, the process proceeds to step S7 and the track number TN
O. Index_Start_TC of index INDEX3 in 1
And the above TCP. If the TCP is smaller than Index_Start_TC of the index INDEX3, the process proceeds to step S8, and the index number is determined to be “2”. If in step S7 the above TCP is index IN
If it is larger than Index_Start_TC of DEX3, the process proceeds to step S9, where the track number TNO. Index at 1
The Index_Start_TC of INDEXM is compared with the above TCP.
Here, the TCP is Index_Sta of the index INDEXM.
If it is smaller than rt_TC, the process proceeds to step S10, and the index number is determined to be "M-1". If step S
9, the TCP is Index_Start_T of the index INDEXM
If it is larger than C, the process proceeds to step S11, where the track number TNO. Index_Sta of index INDEXM in 1
Compare rt_TC with the above TCP. Here, the TCP
Is smaller than Index_Start_TC of the index INDEXM + 1, the process proceeds to step S12, and 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. This is a process for 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 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 processing for determining an index number (IDX) in N-1. Detailed description is omitted.

In 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 the 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.

That is, the disc reproducing apparatus 1 uses the TCP read by the additional information detection processing section 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). Furthermore, the TNO. By comparing each of the N-th index start time code with the TCP, the current index number (IDX) can be determined. By performing the above-described conversion generation flow, the Q data shown in FIG. 17 can be created. Further, as shown in FIG. 4, fixed value data such as control CONTROL and address ADR are added to complete the Q data.

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 "6:10:00 frame" of the index INDEX2 is compared with the TCP, and
Since the CP is large, TC “8” of index INDEX3
The frame is compared with "TCP, minute 10 seconds 00", and the TCP is small. Therefore, the index number is set to "2".

The track number (track number) related to the digital signal of the optical disk 2 and the track elapsed time are displayed on the monitor 12.

In order to convert the additional information read from the optical disk 2 by the optical pickup 3 into data corresponding to, for example, the Q code of sub data of a CD by the disk reproducing apparatus 1 as described above, first, after loading the disk, the area TO
The data of C is read by the additional information detection processing unit 8 and stored in the memory unit 10. At the time of normal track reproduction, the channel status is read while comparing the time code of the header portion with the track list information in the area TOC data stored in the memory portion 10 while reading the time code of the header portion. The user data conversion and generation unit 9 converts and generates user data Q code equivalent to CD.

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

It should be noted that most channel status data is 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 the emphasis is fixed to off, channel status data of a new optical disc can be generated.

With the above method, additional information of a new optical disc is detected, converted into channel status and user data equivalent to that of a CD, generated, and the track number and track progress of the digital signal recorded on the disc are detected. Auxiliary information such as time can be displayed.

It should be noted that, in the disc reproducing apparatus 1, the CD
Alternatively, the present invention may be applied to the case of playing back a hybrid disc in which a CD signal area and a 1-bit digital signal area are stacked, although HD is played. In either case, the track number and the elapsed track time of the audio signal reproduced from the CD layer and the 1-bit digital signal layer can be displayed on the monitor 12.

[0058]

According to the present invention, at the time of reproducing a digital audio signal disc recorded in a new format different from that of a CD, additional information such as a track number and an elapsed time is detected, and then the digital audio interface is used. And auxiliary data such as the track number and the elapsed track time can be displayed by converting and generating the channel status data and the user data specified in the CD.

[Brief description of the drawings]

FIG. 1 is a block diagram of a disk 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;

[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, 9 additional information detection processing unit, 10 sub-data conversion generation unit, 11 memory unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G11B 27/00 D

Claims (14)

[Claims] 1. A program area in which a plurality of programs to which absolute addresses are assigned are recorded, and a start address represented by an absolute address of each program recorded in the program area is managed in association with a program number. A reproducing apparatus for reproducing a recording medium provided with a management area, comprising: reproducing means for reproducing a management area and a program area of the recording medium; and an absolute address of each program included in the management area reproduced by the reproducing means. Storage means for storing the start address described in the above in association with the program number, and the absolute address reproduced from the program area by the reproduction means and the program number stored in the storage means. Comparing means for sequentially comparing the start addresses of the respective programs; and Reproducing apparatus whose serial reproducing means is characterized by comprising a determining means for determining a program number corresponding to the position on the program area that is playing. 2. The reproducing apparatus according to claim 1, further comprising display means for displaying the program number determined by said determining means. 3. The management area of the recording medium further stores an index number for further dividing a single program into a plurality of parts and a start address indicated by an absolute address corresponding to the index number. Second storage means for storing a start address represented by the absolute address in association with an index number obtained by further dividing a single program included in the management area reproduced by the means into a plurality of parts; Second comparing means for sequentially comparing the absolute address reproduced from the program area by the means with the start address stored in the second storage means in association with the index number; Means for determining an index number corresponding to a position on the program area being reproduced by the reproducing means, based on the means. 2. The reproducing apparatus according to claim 1, further comprising: a second determining unit. 4. The reproducing apparatus according to claim 3, further comprising display means for displaying the index number determined by said second determining means. 5. The reproducing apparatus according to claim 1, wherein the data recorded in the program area is a sigma-delta modulated 1-bit digital signal. 6. The reproducing means, based on the absolute address reproduced from the program area by the reproducing means and a start address for each program associated with a program number stored in the storage means. 2. The computer according to claim 1, further comprising a calculating means for calculating an elapsed time for each program of the program being reproduced, and a display means for displaying an elapsed time for each program calculated by said calculating means. The playback device as described in the above. 7. A program area in which a program number and an elapsed address of each program are recorded in association with each program information, and a start address represented by an absolute address of each program recorded in the program area is a program number. A first recording medium having a management area managed in association with a program area, a program area in which a plurality of programs assigned with absolute addresses are recorded, and an absolute address of each program recorded in the program area. A reproduction apparatus for selectively reproducing a second recording medium provided with a management area in which a start address represented by a program number is associated with a program number, wherein the management area and the program area of the selected recording medium Reproducing means for reproducing the information stored in the management area of the second recording medium reproduced by the reproducing means. Storage means for storing a start address represented by an absolute address for each program in association with a program number; and an absolute address reproduced from the program area of the second recording medium by the reproduction means and stored in the storage means. Comparing means for sequentially comparing the program number assigned to each program and the start address of each program associated with the program number. If the selected recording medium is the first recording medium, the comparing means is attached to the program area. Displaying the program number corresponding to the position in the program area being reproduced by the reproducing means based on the program number recorded by the reproducing means. When the selected recording medium is the second recording medium, Is a program number corresponding to a position in the program area being reproduced by the reproducing means based on the comparison result of the comparing means. Reproducing apparatus characterized by comprising a display control means for displaying. 8. The reproducing apparatus according to claim 7, wherein the first recording medium is a digital audio signal of m bits (m is an integer greater than or equal to 2) of quantization bits having a sampling frequency of Fs (Hz). . 9. The digital audio signal according to claim 8, wherein the second recording medium is a digital audio signal of 1-bit quantization bit having a sampling frequency of n × Fs (Hz) (n ≧ 2 is an integer). Playback device. 10. When the selected recording medium is the first recording medium, the reproduction is performed based on an elapsed address for each program recorded in a program area of the first recording medium. 8. The reproducing apparatus according to claim 7, wherein an elapsed time corresponding to a position on the program area being reproduced by the means is displayed. 11. When the selected recording medium is the second recording medium, the absolute address reproduced from the program area of the second recording medium by the reproducing means and the absolute address stored in the storage means. Calculating means for calculating an elapsed time for each program of the program being reproduced by the reproducing means on the basis of the program number and the start address of each program associated with the program number. 8. The reproducing apparatus according to claim 7, wherein the elapsed time for each program is displayed on the display means. 12. The management area of the second recording medium further records an index number for further dividing a single program into a plurality of parts, and a start address represented by an absolute address corresponding to the index number. Storing a start address represented by the absolute address in association with an index number obtained by further dividing a single program included in the management area of the second recording medium reproduced by the reproducing means into a plurality of parts; A second storage unit, an absolute address reproduced from the program area of the second recording medium by the reproduction unit, and a start address stored in the second storage unit in association with the index number. And a second comparing means for sequentially comparing the second comparing means, and the second reproducing means reproducing by the reproducing means based on the second comparing means. 8. The reproducing apparatus according to claim 7, wherein an index number corresponding to a position on the program area of the recording medium is displayed on the display. 13. A program area in which a program number and an elapsed address for each program are recorded in association with each program information, and a start address represented by an absolute address of each program recorded in the program area is a program number. A first layer having a management area managed in association with a program area, a program area in which a plurality of programs assigned with absolute addresses are recorded, and an absolute address of each program recorded in the program area. A playback apparatus for selectively playing back the first and second layers of a second layer of a recording medium having a management area in which a written start address is managed in association with a program number, Reproducing means for reproducing a management area and a program area of the recording medium corresponding to the selected layer; Storage means for storing a start address represented by an absolute address for each program included in the management area of the second layer in association with a program number; Comparing means for sequentially comparing the absolute address reproduced from the program with the start address of each program associated with the program number stored in the storage means; and wherein the selected layer corresponds to the first layer. In the case, the program number corresponding to the position on the program area being reproduced by the reproducing means is displayed based on the program number recorded in association with the program area, and the selected recording medium is In the case of the second layer, the position corresponding to the position on the program area being reproduced by the reproducing means based on the comparison result of the comparing means. Reproducing apparatus characterized by comprising a display control means for displaying the program number. 14. A program area in which a plurality of programs to which absolute addresses are assigned are recorded, and a start address represented by an absolute address of each program recorded in the program area is managed in association with a program number. In a reproducing method for reproducing a recording medium having a management area, a step of reproducing the management area of the recording medium, and a program for setting a start address represented by an absolute address of each program included in the reproduced management area Storing in a memory in association with a number; reproducing the program area; for each program associated with an absolute address reproduced from the program area and a program number stored in the memory And comparing the start addresses of Based on the kicking comparison result, playback method characterized by comprising a step of displaying the program number corresponding to the program being currently reproduced.