JPH11213639A - Distribution system, distribution method, receiving apparatus and receiving method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect contents such as data size or the like before starting the recording by converting a compressed audio data to be distributed and its related information to a block, transmitting this block data by the time division multiplex method, receiving such signal and then isolating it, then recording the data to a recording medium and then notifying such related information to a user. SOLUTION: An audio receiving section 10a isolates the compressed ATRC data and TOC information received via the satellite broadcast and telephone network 41 from an information originating base station or the like and displays the TOC information to the display 14. A main controller 11 transmits, through the telephone network 41, the contents and manipulation to start the recording selected by a user who has confirmed such display using the manipulation input section 13. Upon reception of this information, the ATRAC data originated from the information originating base station is transmitted from the transmission path 2 and it is then recorded to the vacant area of the optical disk D by the recording section 20. Thereby, the title name, producer name and recording capacity can be detected in the receiving side from the TOC information and recording can be started quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a distribution system, a distribution method, a receiving apparatus, and a receiving method for distributing compressed audio data.

[0002]

2. Description of the Related Art Heretofore, a magneto-optical disk called a so-called mini disk (trademark), which is a disk-shaped recording medium having a diameter of about 64 mm, which is housed in a cartridge and capable of recording and reproduction, has been known. This magneto-optical disk uses an audio adaptive change coding method, that is, ATRAC (Adaptive Transform Acoustic Coding) as a sound compression method.
About 74 minutes of audio data can be recorded in stereo using this method. Therefore, such a magneto-optical disk is small and highly portable, so that it can be easily taken out. Also, since this magneto-optical disc can record data unlike a conventional digital audio disc called a so-called compact disc (trademark), it is possible to copy audio data.

The magneto-optical disk is capable of random access to recorded audio data, like a conventional digital audio disk. This is because this magneto-optical disk is provided with an area for recording audio data and a TOC (Table of Contents) area for managing the recorded audio data. Therefore, when overwriting audio data on a magneto-optical disk on which audio data has already been recorded, erasing or editing songs can be performed by rewriting the TOC information without rewriting actual music data. Can be.

[0004]

When transmitting the compressed audio data via a transmission medium such as satellite broadcasting, the receiving apparatus expands the compressed audio data transmitted from the transmitting apparatus. It is conceivable to record on a recording medium without performing. The recording medium mounted in such an audio dubbing system is not necessarily an initial disk (completely recorded disk), but may be a partially used disk. Before starting dubbing, the audio dubbing system in which the remaining recording capacity of the recording medium mounted on the receiving device side is transmitted to the transmitting device in advance, and then the compressed audio data is received. There was a problem that the confirmation work had to be performed.

[0005] There is a problem that it takes a long time to start data distribution by performing the above-described confirmation work before the start of dubbing.

[0006] Further, a method of transmitting management information after a series of compressed audio data has been delivered is also conceivable. For example, a total of 3 songs and a data size of 3 songs for a total of 15 minutes (1 song: 5 songs) If the remaining recording capacity of the recording medium is 10 minutes when transmitting the compressed audio data (three songs per minute), the transmission of the compressed audio data is completely completed and the management is completed. It is possible for the receiving device to recognize that there is a five-minute period that cannot be recorded only after the information transmission is completed.

[0007] That is, the fact that the third tune, which is the last tune, cannot be recorded is found after 15 minutes have passed since the start of dubbing.

[0008] Further, the title of the compressed audio data recorded on the recording medium and the display of related image information are displayed after the transmission of the compressed audio data is completed because the management information is transmitted. Could not do while.

SUMMARY OF THE INVENTION In view of the above problems, the present invention performs packetization on compressed audio data and related information (data size, image information, text information) accompanying the compressed audio data, and performs packetization. A delivery system, a delivery method,
An object of the present invention is to provide a receiving device and a receiving method.

[0010]

In order to solve the above-mentioned problems, a distribution system according to the present invention blocks a compressed audio program distributed from an information center and related information relating to the distributed audio program. Blocking means for converting, a transmitting means for transmitting the compressed audio program and related information blocked by the blocking means in a time-division multiplex manner, and a compressed signal transmitted from the transmitting means in a time-division multiplex manner. Receiving means for receiving the audio program and related information, separating means for separating the compressed audio program and related information received by the receiving means, and storing the compressed audio program separated by the separating means on a recording medium Notifying the user of the recording means for recording and the related information separated by the separating means. Characterized by comprising a knowledge unit.

Further, the distribution method according to the present invention blocks the compressed audio program distributed from the information center and the related information relating to the distributed audio program, respectively. The related information is transmitted by time division multiplexing, the compressed audio program and the related information transmitted by the time division multiplexing are received, the received compressed audio program and the related information are separated, and the separated compression is performed. The recorded audio program is recorded on a recording medium, and the user is notified of the related information.

Further, the receiving apparatus according to the present invention blocks the compressed audio program and the related information relating to the audio program, respectively, and transmits the block-compressed audio program and the related information by time division multiplexing. A receiving device for receiving data transmitted from the center, receiving means for receiving a compressed audio program and related information transmitted by time division multiplexing from the information center, and receiving the compressed data received by the receiving means. Means for separating the audio program and the related information separated by the separating means, a recording means for recording the compressed audio program separated by the separating means on a recording medium, and a notice for notifying a user of the related information separated by the separating means. Means.

Further, in the receiving method according to the present invention, the compressed audio program and the related information relating to the audio program are each blocked, and the block-compressed audio program and the related information are transmitted by time division multiplexing. A receiving method for receiving transmission data from a center, comprising receiving a compressed audio program and related information transmitted by time division multiplexing from the information center, and transmitting the received compressed audio program and related information. Separating and recording the separated compressed audio program on a recording medium,
The related information is notified to a user.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An audio dubbing system according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram for explaining an audio dubbing system according to this embodiment. The audio dubbing system 1 includes a main controller 11, a server 1
2, an audio transmission unit 10 having an operation input unit 13, a display unit 14, etc., a recording unit 20 for recording audio data on a portable recording medium, and a connection cable 2 for connecting the audio transmission unit 10 and the recording unit 20. And

In the audio dubbing system 1, audio data is stored in advance in a server 12 of an audio transmitting unit 10, and a user selects desired audio data from the audio data stored in the server 12, It is to be recorded on a recording medium.

That is, the audio dubbing system 1 does not provide content in a form in which audio data is stored in a medium such as a so-called compact disc or audio tape, but instead provides audio data to a recording medium owned by a user. This is a system that records and provides music content to users. For example, installing the audio dubbing system 1 at a station, a store, or the like to provide music contents to a user for a fee, or installing the audio dubbing system 1 in a music studio or the like and using it for content management. Can be.

First, the audio dubbing system 1
The outline of the content provision mode will be described.

The server 12 of the audio dubbing system 1 stores music contents of about several minutes per music as audio data, for example, music contents of the top 100 of the latest hit charts. The user checks the content provided by the audio dubbing system 1 on the display unit 14, and when there is a desired content, selects one or a plurality of contents using the operation input unit 13. Then, the user loads the recording medium D owned by the user into the recording unit 20, and
An operation for starting recording is performed using the operation input unit 13.

When a recording start operation is performed by the user, the main controller 11 of the audio transmission unit 10
Supplies the recording unit 20 with audio data of a predetermined content designated by the user among the contents stored in the server 12. The recording unit 20 records the audio data supplied from the audio transmission unit 10 in a recordable area of a recording medium.

When the recording of the audio data of the content desired by the user on the recording medium is completed, the audio dubbing system 1 completes the provision of the content.

Hereinafter, the audio dubbing system 1
Will be described in detail. As a recording medium handled by the audio dubbing system 1 according to the present embodiment, a magneto-optical disk capable of recording and reproduction defined in a format called a so-called mini disk (trademark) will be described. I will do.

The magneto-optical disk referred to as the mini-disc is a disk-shaped recording medium having a diameter of about 64 mm housed in a cartridge. This mini-disc has an ATRAC (Adaptive Transform Acoustic Acoustic Acoustic) as an audio compression system.
The audio data can be recorded in stereo for about 74 minutes using the stic coding method. Hereinafter, this magneto-optical disk called a so-called mini disk is simply referred to as an optical disk D.

Also, the audio dubbing system 1
Since the audio data compressed by the ATRAC method is recorded on the optical disc D, the audio data of the content stored in the server 12 is compressed by the ATRAC method in advance, and the audio data compressed by the ATRAC method is decoded and encoded. The data is directly recorded on the optical disc D without any processing. Hereinafter, audio data compressed by the ATRAC method is referred to as ATRAC data. Therefore, from the audio transmission unit 10 to the recording unit 20
The connection cable 2 for transmitting audio data to the
RAC data will be transmitted. Note that control commands and TOC of the optical disc D
(Table of contents) Command data such as information (Comman
d) etc. are transmitted. Details of the transmission protocol will be described later.

In FIG. 1, the audio transmitting unit 1
0, the server 12 is provided, for example, by installing the server 12 in an information center located in a remote place,
Main controller 11, display unit 14, operation input unit 1
3. The recording unit 20 may be arranged in the same housing to communicate with the server 12 located at the remote place using an ISDN or a telephone line.

Next, the data format of the optical disc D used in the audio dubbing system 1 will be described.

The data recorded on the optical disc D is shown in FIG.
As shown in (1), it is managed in units called clusters.
Data is written on the optical disc D at an integral multiple of this cluster. AT recorded in this one cluster
When the RAC data is reproduced, it becomes an audio signal of about 2.04 seconds.

One cluster includes a linking sector (linking sector).
(sector) and one sub data sector (sub data), and audio data compressed by the ATRAC system is recorded. Main sector is 32 sectors total 3
It is composed of six sectors. These sectors are
It is a unit composed of 2352 bytes of data.

A linking sector is an ACIRC (Advance) in the format of the optical disc D.
d Cross Interleave Reed Solomon Code) Since the error correction process is used, the sector is assigned so that the interleaving of the error correction process is completed within the cluster. That is, the linking sector (linking sector)
Sector) is a discarded sector in consideration of interleaving in error correction processing so that data can be rewritten in cluster units.

The sub data sector (sub data) is a reserved area.

On the optical disc D, a 424-byte ATR
Data compressed by the AC method is handled in units called sound groups. In this sound group, 212 bytes of data are assigned to each of the left and right channels. When the compressed data of this sound group unit is expanded, it corresponds to 512 samples of the left and right channels. This 512 sample data is:
This corresponds to 2048 bytes of data. Specifically, 512
Sample × 16 bits × 2 channels ÷ 8 bits = 20
48 bytes.

A collection of 11 sound groups constitutes 2 sectors as shown in FIG.

The recording area of the optical disc D is ATR
A program area in which audio data compressed in the AC format is recorded, and a U-TOC (User Table of Contents), which is a management area in which management data for managing audio data recorded in the program area, are read-in. P-TOC (Pre-mastered Table of Con
tents).

In the optical disc D, music can be deleted or edited by rewriting the U-TOC information without physically deleting and rewriting actual music data. For example, if the start address and end address of the third song are designated as recordable areas for the optical disc D on which five songs are recorded, the third song cannot be reproduced. Therefore, when recording ATRAC data on the optical disc D, the U-TOC information must be rewritten at the same time. Hereinafter, the U-TOC will be described. Note that a unit of audio data recorded on the optical disc D is hereinafter referred to as a “track”. This track is, for example, a unit of a song, and is a unit corresponding to the music content provided by the audio dubbing system 1 described above.

The U-TOC of the optical disc D is the U-TOC
It is composed of 16 sectors from sector 0 to U-TOC sector 15. Note that this U-TOC sector n (n is 1
To 15) are hereinafter simply referred to as U-TOCn.

FIG. 4 shows data recorded on the U-TOC0. Here, the data recorded in the U-TOC0 is divided into 1-byte units and represented as slots for convenience. Each slot is designated by multiplying a numerical value of 0 to 587 on the vertical axis shown in FIG. 4 by a slot number of 1 to 4 from the left of the horizontal axis. Note that the same applies to U-TOC1 and later.

The U-TOC0 has 12 bytes of header data, followed by Clu indicating address information of the TOC0.
SterH and ClusterL are recorded. U-TOC0 contains M indicating the manufacturer of the optical disc D.
aker code and M indicating the model of the optical disc D
Model code, First TNO indicating the track number of the first track of the optical disc D, and Last TNO indicating the track number of the last track are recorded from the slot 7 × 1. In addition, in U-TOC0,
Used Sectors indicating the use status of the sector are set in the slot 8 × 4,
iscSerialNo is recorded in slot 10 × 4.

In U-TOC0, Disc ID indicating the ID number of the optical disc D and P-pointer indicating the slot in which the start address of the area for recording the defect address information generated on the optical disc D are recorded. D
FA (Pointer for Defective Area) and P-EMPTY (Pointer for Defective Area)
An empty slot) and a pointer for free area (P-FRA) indicating a slot in which a start address of an area for managing a recordable area is recorded are recorded from slot 11 × 1. In U-TOC0, P-TNOn, which is a pointer indicating the slot where the start address of each track recorded on the optical disc D is recorded, is changed from slot 12 × 2 to slot 75.
X4 is recorded. Here, n indicates the track number of each track. This optical disc D contains 25
Since 5 tracks can be provided, this n is 1
It is represented by an integer of up to 255.

The U-TOC0 includes a start address, an end address, and link information (Lin
kP) and the track mode (Trackmode) are slots 78 ×
1 to slot 587 × 4. U-T
The OC0 is provided with 255 × 4 × 2 slots for recording the start address and the end address and the like, and the start address and the end address and the like are recorded in the slots corresponding to each track.

Therefore, the above-mentioned P-DFA, PE
The pointer recorded in MPTY, P-FRA indicates the slot of the start address represented from slot 78 × 1.

The above-mentioned start address and end address are represented by data of 3 bytes = 24 bits as shown in FIG. In the start address and the end address, a cluster address is recorded in the first 14 bits, a sector address is recorded in the next 6 bits, and a sound group address is recorded in the last 4 bits.

The track mode (Trackmode) is represented by 1 byte = 8 bits of data, as shown in FIG. In this track mode (Trackmode), recording protection information is recorded in the first bit, copy protection information is recorded in the second bit, generation information is recorded in the third bit, audio information is recorded in the fourth bit, and erasure storage information is recorded in the fifth and sixth bits. , The seventh bit records monaural or stereo information, and the eighth bit records emphasis information. That is, this track mode (T
rackmode) records related information specific to each track.

The link information (P-Link) is obtained when the same track is not recorded on the optical disc D in a continuous data stream, that is, when the data of the same track is discretely recorded in the recording area on the optical disc D. If it is, it is a pointer for tracing from which start address the next data is recorded. For example, when one track needs to be reproduced from the start address of the slot 586 × 1 following the end address shown in the slot 78 × 1, the slot 80 × 4 The link information (Link-P) indicates the slot 581 × 1.

That is, in the optical disc D, data need not always be recorded in a continuous form on a recording medium, that is, it is not necessary to record in a continuous data stream, and a sequential data sequence is discretely recorded. May be. Even if data is recorded discretely in this way, the link information (P-Link) indicates the continuity of the data. During reproduction, the read data is temporarily stored in the memory, and the write rate to the memory is reduced. By setting the reading rate faster than the reading rate, continuous data can be reproduced without interruption.

Even in the case where data shorter than the recorded program is overwritten on the already recorded data, the recordable area (PF
By specifying as (RA), it is possible to record efficiently.

Hereinafter, a method of combining discrete areas using the example of the P-FRA which is a recordable area will be described.
This will be described with reference to FIG.

For example, 03h (h) is assigned to the P-FRA indicating the head position of the slot for managing the recordable area of the U-TOC0.
exia-decimal) was recorded, this 03h
First, access the slot corresponding to.

The start address and end address data recorded in the slot 03h indicate the start address and end address of one part in a track recorded on the disk.

The link information recorded in the slot 03h indicates the slot number to be continued next, and in this case, 18h is recorded.

The link information recorded in the slot 18h is followed by accessing the slot 2Bh, the link information recorded in the slot 2Bh is followed by accessing the slot E3h, and until the 00h data appears as link information. Follow link information.

As described above, the slot is traced from the slot designated by the P-FRA until the link information becomes Null (= 00h), and the parts constituting one track discretely recorded on the disk are searched. It is possible to connect them on a memory.

The range indicated by the start address and the end address of the slot 18h indicated by the link information of the slot 03h can be determined as a recordable area. Further, the slot 1F described in the link information of the slot 18h
By following h, the range indicated by the start address and the end address of the slot 1Fh can be determined as a recordable area.
Further, by following the slot 2Bh described in the link information of the slot 1Fh, the range indicated by the start address and the end address of the slot 1Fh can be determined as the recordable area. As described above, the slot address where the link information is recorded is traced, and the slot is traced until the link information becomes 00h.

Here, P-FRA has been described as an example.
Similarly, DFA, P-EMPTY, and P-TNO0 to 255 can combine discretely existing parts.

FIG. 8 shows data recorded on the U-TOC1.

The U-TOC 1 manages the title of each track recorded in the program area and the title of the entire optical disc D.

When the track to be recorded is audio data, the entire title of the optical disc D is information such as an album title and a player name, and the title of each track corresponds to a song name.

The character information for each track is P-TNAn
(n is from 1 to 255), and is recorded in a slot designated by a number. If the number of characters is large, a plurality of slots are linked to each other using link information for recording.

FIG. 9 shows data recorded on the U-TOC2.

In the U-TOC2, the recording date and time of each program recorded in the program area is the same as the U-TOC2 described above.
It is managed in the same form as OC0.

FIG. 10 shows data recorded on the U-TOC4.

The U-TOC 4 is managed in the same manner as the above-described U-TOC 1 so that katakana and kanji can be used as fonts for the title of each program recorded in the program area and the title of the entire optical disc D. .

Next, the configuration of the audio dubbing system 1 will be described in more detail with reference to FIG. 11 by adding the configuration of the recording unit 20 to the configuration shown in FIG.

FIG. 11 is a block diagram of an audio dubbing system 1 according to this embodiment. The audio dubbing system 1 includes a main controller 11,
An audio transmission unit 10 having a server 12, an operation input unit 13, a display unit 14, etc., a recording unit 20 for recording audio data on a portable recording medium, and an audio transmission unit 10
And a connection cable 2 for connecting the recording unit 20 and the recording unit 20.

The recording unit 20 includes a memory controller 21 that controls a random access memory (RAM) 22 that stores data to which data is supplied from the audio transmitting unit 10, and an encoding / decoding unit that decodes and encodes data.
A decoding circuit 23, a magnetic head driving circuit 24 for driving a magnetic head 25, an optical pickup 26 for irradiating a laser beam to the optical disk D and detecting the reflected light, and a focus error signal (from the reflected light detected from the optical pickup 26) FE), push-pull signal (PP), magneto-optical reproduction signal (MO)
And a signal corresponding to the groove wobble formed in the guide groove of the optical disc D based on the push-pull signal (PP) from the RF amplifier 27, and A
An address decoder 28 for decoding the DIP, a spindle motor 29 for rotating and driving the optical disc D, and a sled mechanism 30 for driving the optical pickup 26 in the radial direction of the optical disc D are provided.

The recording unit 20 includes an RF amplifier 27
Focus error signal (FE), push-pull signal (P
The servo circuit 31 controls a focus servo, a tracking servo, a thread servo, a spindle servo, and the like based on P) and the like, and a system controller 32 that controls the memory controller 21, the encode / decode circuit 23, the servo circuit 31, and the like.

The optical pickup 26 irradiates a laser beam to the optical disk D from a laser diode via an objective lens. The optical pickup 26 detects the reflected light from the optical disc D with a photodetector and supplies a detection current to the RF amplifier 27.

The RF amplifier 27 generates a focus error signal (FE), a push-pull signal (PP), and a magneto-optical reproduction signal (MO) based on a detection current from a photodetector of the optical pickup 26. The RF amplifier 27 supplies the generated focus error signal (FE) to the servo circuit 31, supplies the push-pull signal (PP) to the address decoder 28 and the servo circuit 31, and encodes and decodes the magneto-optical reproduction signal (MO). It is supplied to the circuit 23.

The servo circuit 31 drives the objective lens via the two-axis mechanism of the optical pickup 26 based on the supplied focus error signal (FE) and push-pull signal (PP) to irradiate the magneto-optical disk D. It performs laser beam tracking and focus servo control. Further, the servo circuit 31 drives the sled mechanism 30 based on the push-pull signal (PP) to perform sled servo control for driving the optical pickup 26 in the radial direction of the optical disc D. Further, the servo circuit 31 performs spindle servo control for driving the spindle motor 29 so that the optical disk D has a constant linear velocity (CLV) based on a spindle error signal from a rotation detection circuit of the optical disk D (not shown). Do.

The address decoder 28 reproduces address information from a so-called wobble signal corresponding to a groove wobble formed in a guide groove of the optical disc D.

The encode / decode circuit 23 binarizes the magneto-optical reproduction signal (MO) supplied from the RF amplifier 27, demodulates the signal by an EFM (eight fourteen modulation) method, and furthermore, performs a CIRC (cross interleaved read solo).
mon coding) Performs error correction decoding by the method.
Further, the encoding / decoding circuit 23 adds an error correction code to the recording signal supplied from the memory controller 21 by the CIRC method, modulates the recording signal by the EFM method, and supplies the recording signal to the magnetic head driving circuit 24.

The magnetic head drive circuit 24 encodes
The magnetic head 2 based on the recording signal from the decode circuit 23
5 is driven to apply a modulation magnetic field to the optical disc D to record a signal.

The memory controller 21 controls writing and reading of ATRAC data to be stored in the random access memory 22. This memory controller 2
1 is ATRAC supplied from the audio transmission unit 10
After temporarily storing the data in the random access memory 22, the data is supplied to the encode / decode circuit 23.

The system controller 32 controls the entire recording section 20 and, for example, the memory controller 2
1, control the encode / decode circuit 23, the servo circuit 31, and the like. The system controller 32 controls each circuit that exchanges control data with the audio transmission unit 10, which will be described later in detail.

With the above configuration, the recording section 20 of the audio dubbing system records the ATRAC data transmitted from the audio transmission section 10 on the optical disc D.

Next, a method of transferring data between the audio transmitting section 10 and the recording section 20 of the audio dubbing system 1 will be described with reference to FIG.

In the audio dubbing system 1, a connection cable 2 for connecting the audio transmission unit 10 and the recording unit 20 is provided.
As shown in (a), AT which is compressed audio data supplied from the audio transmission unit 10 to the recording unit 20
An ATRAC line 2a through which RAC data is transmitted, and an ATRA line supplied from the recording unit 20 to the audio transmitting unit 10.
DataR in which C data request signal (Data Req) is transmitted
eq line 2b.

The ATRAC data corresponding to the content stored in the server 12 is transmitted to the main controller 11 of the audio transmission unit 10 via the ATRAC line 2a.
To the memory controller 21 of the recording unit 20. The transmitted ATRAC data is stored in the recording unit 20.
Is transmitted at a transfer rate for each predetermined capacity unit according to the capacity of the random access memory 22. Also, DataR
A request signal indicating a request for ATRAC data from the system controller 32 of the recording unit 20 to the main controller 11 of the audio transmission unit 10 via the eq line 2b
(Data Req) is transmitted. That is, since the ATRAC data is transmitted in a predetermined capacity unit, the recording unit 20 transmits this request signal (Data Req) when all the ATRAC data that has already been transmitted and read into the random access memory 22 has been written to the optical disc D. Audio transmission unit 10
To request the next data. If all of the ATRAC data already written in the random access memory 22 has not yet been recorded on the optical disc D, a request signal (D
Ata Req) is transferred to the audio transmission unit 10 in a standby state.

More specifically, the relationship between the ATRAC data and the request signal (Data Req) is shown in the time chart of FIG.

[0079] If the recording state of the recording unit 20 is normal, first, the recording unit 20 at time t _11, the request signal (Data
Req) is supplied to the audio transmission unit 10. The audio transfer unit 10, the request signal (Data Req) is supplied, at time t _12, the predetermined capacity of the recording unit 20 ATR
Start supply of AC data. Then, the recording unit 20
, When ATRAC data are supplied, at time t _13, to stop the supply of the request signal (Data Req).

If the recording state of the recording unit 20 is not normal, as shown from time t ₁₄ to time t ₁₅ ,
Request signal (Data Req) from the
Is not supplied, and thus the ATRAC data is not supplied from the audio transmission unit 10 to the recording unit 20.
Note that the audio transmitting unit 10 will not supply the request signal (Data Req) for a predetermined time
Interrupt the recording process.

[0081] section indicated from time t ₁₅ to time t ₁₆ is ATR
This indicates that the supply of the AC data to the recording unit 20 is normal.

Further, the recording unit 20 operates from time t ₁₆ to time t _16
As shown in FIG. ₁₇ , even if the request signal (Data Req) is supplied, if the ATRAC data is not supplied from the audio transmission unit 10 for a predetermined time, a standby state of data writing is entered,
For example, it enters a recording pause state and waits for ATRAC data. Then, the recording unit 20, if it is supplied ATRAC data, as shown at time t _17, to start the write operation. The audio dubbing system 1
When the write standby state continues for a certain period of time, it is determined that some trouble has occurred, and the process is interrupted.

Therefore, in the audio dubbing system 1, the recording unit 20 transmits the ATR to the audio transmitting unit 10.
By supplying an AC data request signal (Data Req), ATRAC data can be reliably recorded.

Further, in the audio dubbing system 1, as shown in FIG.
A COMMAND line 2c for transmitting each command data such as a control command and TOC information supplied from the recording unit 20 to the recording unit 20, and an acknowledgment signal (ACKNOWLEDGE) of each command data supplied from the recording unit 20 to the audio transmission unit 10 are transmitted. ACK line 2d.

The TOC information generated by the main controller 11 of the audio transmission unit 10 and command data such as the data size of ATRAC data of each content are supplied to the system controller 32 of the recording unit 20 via the COMMAND line 2c. Also, ACK line 2
When the recording unit 20 completes the processing based on the command data via d, an acknowledgment signal (ACKNOWLEDGE) indicating that the processing is completed is sent from the system controller 32 of the recording unit 20 to the main controller 11 of the audio transmission unit 10. Transmitted.

Specifically, the relationship between the command data and the acknowledge signal (ACKNOWLEDGE) is shown in the time chart of FIG.

First, the audio transmitting unit 10 sets the time t ₂₁
, Predetermined command data is supplied to the recording unit 20. When the supply of the command data is completed, the recording unit 2
0 at time t _22, performs processing based on the supplied command data. Recording unit 20 has finished the processing based on this command, at time t _23, the acknowledgment signal (ACK
NOWLEDGE) to the audio transmission unit 10. When the acknowledgment signal (ACKNOWLEDGE) is supplied, the audio transfer unit 10 sends at time t _24, and supplies the recording unit 20 the reset command. When the reset command, the recording unit 20 at time t _25, the acknowledgment signal
(ACKNOWLEDGE) supply is stopped. Note that the audio transmitting unit 10 supplies the command data even if the acknowledgment signal (A
If (CKNOWLEDGE) is not supplied from the recording unit 20 for a certain period of time, it is determined that some trouble has occurred, and the processing is interrupted.

The audio transmission unit 10 sends the recording unit 20 C
Table 1 below shows the command data supplied via the OMMAND line 2c.

[0089]

[Table 1]

The setup command (SET UP) is a command for putting the recording unit 20 into a recording standby state, that is, a recording pause state. When the setup command (SET UP) is supplied, the recording unit 20 enters a recording pause state. This setup command
(SET UP) is specifically given by 1-byte data of “01”.

The start command (START) is ATRAC
This command indicates the start of data recording. When this start command (START) is supplied, the recording unit 20 starts recording ATRAC data on the optical disc D. This start command (START) is specifically composed of one byte “0”.
2 "data.

The stop command (Stop) is a command indicating the end of the processing of the recording unit 20 based on each command.
When this stop command (Stop) is supplied, the recording unit 2
0 stops, for example, the recording process based on the start command (START). The stop command (Stop) is specifically given as 1-byte “03” data.

The TOC0 information command (TOC0
0info) is a command indicating information to be recorded in sector 0 of the U-TOC of the optical disc D. When the U-TOC0 information command (TOC0info) and the information on the track size and the track mode following this command are supplied, the recording unit 20 reads the AT recorded from the track size.
The start address and end address of the RAC data are obtained, and the TOC information is recorded in U-TOC0.

That is, the information of TOC0 is originally generated by the recording unit 20 and recorded on the optical disk D. However, for example, when ATRAC data of a plurality of contents is supplied from the audio transmission unit 10, since ATRAC data of the plurality of contents is supplied to the recording unit 20 as a series of data streams, a break in the plurality of contents cannot be determined. Track information cannot be generated. Therefore, from the audio transmission unit 10,
A data size indicating the stream length of data corresponding to each content and a track mode are supplied as a TOC0 information command (TOC0info). Then, the recording unit 20 outputs the TOC0 information command (TOC0 information command).
0info), the TOC to be recorded on the optical disc D based on the information of
0 information is generated.

The track number TOC0 information command (TOC0info) is specifically composed of one byte “0”.
4 "data.

The track number command (TNO) is a command for designating a track number of ATRAC data to be recorded. When this track number command (TNO) and the track number following this command are supplied, the recording unit 20
Performs a process corresponding to, for example, a title command (Title) or the like that follows on the track number. The track number command (TNO) is specifically 1 byte “05”.
Is given by

The reset command (ACK-RESET) is a command for resetting the acknowledgment signal (ACKNOWLEDGE) supplied from the recording unit 20. This reset command (ACK-RESE
T) When the command is supplied, the recording unit 20 outputs an approval signal
(ACKNOWLEDGE) supply is stopped. Reset command (A
CK-RESET) is specifically given as 1-byte “08” data.

The recording status confirmation command (ALRIGHT) is a command for confirming the recording status of the recording unit 20. When this recording status confirmation command (ALRIGHT) is supplied, the recording unit 2
0 indicates that the acknowledgment signal (ACKNOWL
(EDGE) is supplied to the audio transmitting unit 10. The recording status confirmation command (ALRIGHT) is specifically composed of one byte “0”.
b ".

The title command (Title) is a command for giving title information to be recorded on the TOC1 and TOC4 of the optical disc D. Following this title command (Title), character string information and character data are supplied.
When these are supplied, the recording unit 20 reads the T
Title information corresponding to each track is recorded in OC1 and TOC4. The title command (Title) is specifically given as 1-byte “83” data.

Next, the processing contents of the audio dubbing system 1 will be described with reference to the flowchart shown in FIG.

In the audio dubbing system 1, one or a plurality of contents to be recorded on the optical disc D are selected from the server 12 by the user, and the optical disc D is recorded on the recording unit 20.
Upon completion of the initial setup such as loading into the CPU, processing from step S11 shown in FIG. 13 is started.

In step S11, the audio dubbing system 1 inquires of the user whether or not to perform an error check using the display unit 14, and when the user inputs using the operation input unit 13 whether or not to perform an error check, the step proceeds to step S11. Proceed to S12. The details of this error check will be described later.

In step S12, the audio transmitting unit 10 sends the setup command (SET UP) to the COMMA
The data is supplied to the recording unit 20 via the ND line 2c. When the setup command (SET UP) is supplied from the audio transmission unit 10, the recording unit 20 sets the recording state on the optical disc D to the recording pause state, and sets the acknowledgment signal (ACKNOW).
WLEDGE) is supplied to the audio transmission unit 10 via the ACK line 2d.

In step S13, the audio transmission unit 10 determines whether or not the acknowledgment signal (ACKNOWLEDGE) has been supplied from the recording unit 20, and if the acknowledgment signal (ACKNOWLEDGE) has been supplied, the process proceeds to step S15. If the acknowledgment signal (ACKNOWLEDGE) is not supplied from the recording unit 20 during the period, the process proceeds to step S14.

In step S14, the audio transmitting unit 10 determines that the recording unit 20 cannot record on the optical disc D due to some trouble, displays an error message or the like on the display unit 14, and ends the processing.

In step S15, the audio transmitting unit 10 sends a start command (START) to COMMAND.
The data is supplied to the recording unit 20 via the line 2c. When the start command (START) is supplied, the recording unit 20 supplies a request signal (Data Req) to the audio transmitting unit 10 via the DataReq line 2b. This request signal (D
When (ata Req) is supplied, the audio transmission unit 10 supplies ATRAC data to the recording unit 20 for each predetermined capacity.
When the ATRAC data is supplied, the recording unit 20 records the data in the recordable area of the optical disc D.

At this time, even if a plurality of tracks are specified by the user, that is, even if a plurality of contents are specified, the audio transmission unit 10 sets the ATRAC
The data is supplied to the recording unit 20 as a series of streams. The recording unit 20 also stores information on the TOC of the disc in advance so that when the recording on the optical disc D is not performed normally, the state of the optical disc D can be returned to the state of the disc before recording. Is stored in an external memory or the like.

When the recording of ATRAC data is started in step S15, the flow advances to step S16.

In step S16, the audio transmitting unit 10 sends the recording status confirmation command (ALRIGHT) to the COMM
The data is supplied via the AND line 2c and the recording state of the recording unit 20 is confirmed. Upon receiving the acknowledgment signal (ACKNOWLEDGE) from the recording unit 20 and confirming that the recording state is normal, the audio transmission unit 10 proceeds to step S17, and in this step S17, confirms whether or not the recording has been completed. If the recording has not been completed, the process returns to step S16 again to check whether the recording has been performed normally.
That is, in steps S16 and S17,
At regular intervals, it is checked whether the recording is normal and whether the recording has been completed.

If it is determined that the recording is not normally performed by the recording unit 20, the process proceeds from step S16 to step S14.
Then, the recording process is interrupted. At this time, in order to return the optical disc D to a state before recording, a process of writing the previous TOC information stored in an external memory or the like into the optical disc D is performed.

When it is determined that the recording has been completed, the process proceeds from step S17 to step S18.

In step S18, the audio transmitting section 10 supplies a stop command (Stop) to the recording section 20 via the COMMAND line 2c. When the stop command (Stop) is supplied, the recording unit 20 sets the ATR
The recording process of the AC data ends. When the stop command (Stop) is supplied in step S18, the process proceeds to step S19.

In step S19, the audio transmitting section 10 transmits the track number command (TNO) together with the track number command (TNO).
It supplies an OC0 information command (TOC0info) and track size information, and a title command (Title) and necessary TOC information such as the number of characters of the title and character data.

When such TOC information is supplied from the audio transmission unit 10, the recording unit 20 transmits the U-TOC0 to U-TOC0 of the optical disc D based on the supplied TOC information.
-Record data in TOC4. At this time, the start address and end address of each track are
It is generated based on the track size information supplied following the 0 information command (TOC0info). That is, since ATRAC data is supplied as one data stream, this data stream is divided by the data size for each track to generate TOC information.

When necessary TOC information is supplied in step S19, the process proceeds to step S20.

In step S20, the audio transmitting section 10 determines whether or not the user has set to perform an error check in step S11. If the user has set to perform an error check, the process proceeds to step S21. If the user has not set to perform an error check, the process proceeds to step S23.

In step S21, the audio transmitting section 10 supplies an error check command to the recording section 20 via the COMMAND line 2c. When the error check command is supplied, the recording unit 20 reads the recorded ATRAC data and checks whether the recorded data has an error.

When the error check by the recording unit 20 is started, in step S22, the audio transmission unit 1
0 waits until the error check ends, and when the error check ends, the process proceeds to step S23.

In step S23, the audio transmitting section 10 displays the recording result on the display section 14. For example,
As a result of the error check, if an error has occurred in the recorded data, for example, an error message is displayed. As a result of the error check, if an error occurs in the recorded data, the T before recording stored in an external memory or the like is stored.
The OC information is recorded on the optical disc D.

When the recording result is displayed in step S23,
The audio dubbing system 1 ends the processing.

As described above, the audio dubbing system 1 can reliably record ATRAC data on the optical disc D by performing the processing from step S11 to step S23.

In the processing from step S11 to step S23, the processing for supplying the necessary TOC information to the recording unit 20 after recording all the ATRAC data has been described.
Before the audio transmitting unit 10 supplies ATRAC data to the recording unit 20,
C information can also be supplied.

That is, after the setup in step S19 is completed, the start command (START) is issued.
Before supply, that is, step S13 and step S13
Performed during the processing of No. 15. Since the recording unit 20 records the TOC information after recording the ATRAC data on the optical disk D, it is necessary to store the previously supplied TOC information in an external memory or the like. Thus A
By storing the TOC information in an external memory or the like before recording the TRAC data, the title of the music piece to be recorded can be displayed on the display unit.

In the audio dubbing system 1, the audio transmitting unit 10 transmits the ATR to the recording unit 20.
While supplying the AC data, the TOC information can be supplied in parallel.

That is, the data lines for supplying ATRAC data and each command are ATRAC lines 2a and C
Since it is separate from the OMMAND line 2c, the processing of steps S16 and S17 and the processing of step S19 can be performed in parallel, and therefore, the data transmission time can be shortened. In this case, similarly, the recording unit 20 needs to store the TOC information in an external memory or the like, and after recording all the ATRAC data, record the TOC information on the optical disc D.

In the processing from step S11 to step S23, ATRAC data corresponding to a plurality of contents is handled as one data stream, and information necessary for generating TOC information is transmitted to the audio transmitting unit 10. Has been described above, but the audio dubbing system 1 is not limited to such processing. When a plurality of contents are specified by the user, the ATRAC corresponding to one content may be used.
Data is recorded on the optical disc D, and the AT
It is also possible to generate and record the TOC of the RAC data, and further record ATRAC data corresponding to the next content.

That is, from step S15 to step S
Such processing can be performed by forming a loop that repeats the processing up to 19 for each piece of content.

Next, a case where two music pieces of music content are recorded on the optical disc D will be specifically described with reference to a timing chart and the like.

As shown in FIG. 14A, the server 12 has the title “ByeBye” and the track mode (trm
d) is "a6" and the track size is "0002.0.0.0".
0 "and the title is" Hell "
o ", the track mode (trmd) is" a6 ", and the track size is" 0010.2f. 0a "second content;
Title is "Morning", track mode (trmd)
Is “86” and the track size is “0020.1e.0”.
A plurality of contents such as a third content of “0” are stored.

An optical disk D serving as a recording medium has a structure shown in FIG.
As shown in (b), the title is “Emotion”,
A first track having a track mode (trmd) of “e6” and a track size of “0011.5.0.02” and a title of “Dream” and a track mode (trmd) of “e6”
6 "and a track size of" 0022.1f. Tracks corresponding to two pieces of music including the second track 0a "are recorded.

The second content (title is “Hello”) stored in the server 12 indicated by ◎ in FIG.
ATRAC data) and the third content (ATRAC data whose title is "Morning") are recorded on the optical disc D, processing is performed as shown in FIGS. 15 to 18 below.

FIG. 15 is a timing chart of command data between the audio transmitting unit 10 and the recording unit 20 when transmitting ATRAC data.

First, at time t ₃₁ , the recording unit 20
A setup command (SET UP) is supplied to the recording unit 20. When the setup command (SET UP) is supplied, the recording unit 20 changes the recording pause state to the time t _32.
Sends an acknowledgment signal (ACKNOWLEDGE) to the audio transmission unit 1
Supply 0. When the acknowledgment signal (ACKNOWLEDGE) is supplied, the audio transmission unit 10 resets the reset command (ACK-R
ESET) is supplied to the recording unit 20, and the acknowledgment signal (ACKNOWLED
GE).

[0134] The audio transfer unit 10 sends at time t _33, supplied to the recording unit 20 a start command (START). The supply of the start command (START) corresponds to the processing in step S15 described above. Start command (S
TART) is supplied, the recording unit 20 starts the recording operation, and at the same time, acknowledge signal (ACKNOWLEDGE) and request signal (D
ata Req) is supplied to the audio transmission unit 10.

[0135] The audio transmitting section 10 transmits a request signal (Data
Req), at time t ₃₄ , the ATRAC data of a predetermined capacity to the recording unit 20, that is, the server 1
2 (the title is "He
IIlo "ATRAC data) and the third content (ATRAC data with the title" Morning ")
To start supplying. Then, the audio transmitting unit 10
Supplies ATRAC data to the recording unit 20 sequentially based on the request signal (Data Req) supplied from the recording unit 20 at times t ₃₅ , t ₃₆ , t ₃₇ , and t ₃₈ in order to supply ATRAC data for each predetermined capacity. Supply.

The audio transmitting unit 10 supplies a recording status confirmation command (ALRIGHT) at regular intervals to check whether the recording state of the recording unit 20 is normal. The supply of the recording status confirmation command (ALRIGHT) to determine whether the recording state is normal corresponds to the processing in step S16 described above.

[0137] Then, the audio transfer unit 10 has determined that it has supplied all ATRAC data to the recording unit 20 at time t _39, supplies the stop command (Stop) to the recording unit 20. The process of supplying the stop command (Stop) corresponds to the process of step S18 described above. Is supplied stop command (Stop) is, the finished recording supplied all ATRAC data to the optical disc D, the recording unit 20 at time t _40, with the recording process is terminated, the audio sending an acknowledgment signal (ACKNOWLEDGE) To the unit 10.

FIG. 16 is a time chart of the TOC0 information command (TOC0info) supplied from the audio transmitting unit 10 to the recording unit 20 in step S19 described above. FIG. 16A shows a time chart of data supplied from the audio transmission unit 10 to the recording unit 20, and FIG. 16B shows a recording state of the U-TOC0 of the optical disc D at each time. .

First, the U-TOC0 of the optical disk D has
At a time _{51 at} which no TOC0 information command (TOC0info) is supplied, the first and second tracks (the title is “Emotion”) recorded earlier
And the start address, end address, and track mode of the “Dream” track). Also,
In the U-TOC0 of the optical disc D, a start address, an end address, and a track mode of the compressed audio data temporarily recorded as the third track are recorded. Here, it is assumed that the compressed audio data recorded as the third track is the audio transmission unit 1
Even if audio data of two tracks, for example, is transmitted from 0, it is transmitted in one data stream when it is transmitted. This is because the recording unit 20 treats this data stream as one track and records audio data. That is, the recording unit 20
Generates TOC information and divides the audio data treated as one track in the subsequent processing.

[0140] The audio transfer unit 10 sends at time t _52, supplies the track mode of the first content, the track size. That is, the audio transmission unit 10
Along with the TOC0 information command (TOC0info), the content number of ATRAC data whose title is "Hello", the track mode of this content,
Supply the track size of this content.

When the track mode and the track size of the first content are supplied, the recording unit 20 generates U-TOC0 information based on the supplied information and performs a process of recording the information on the optical disc D. Thus, at time t _53, the U-TOC0 of the optical disc D, the track mode and the start address and end address corresponding to the first content is recorded.

Subsequently, the audio transmitting section 10 sets the time t ₅₃
, The track mode and the track size of the second content are supplied. That is, the audio transmission unit 1
0 is TOC0 information command (TOC0info)
ATRAC with the title "Morning"
The content number of the data, the track mode of the content, and the track size of the content are supplied.

When the track mode and the track size of the second content are supplied, the recording unit 20 generates U-TOC0 information based on the supplied information, and performs a process of recording the information on the optical disc D. Thus, at time t _54, the U-TOC0 of the optical disc D, the track mode and the start address and end address corresponding to the second contents are recorded.

Then, the audio transmitting unit 10 outputs the time t
_{At 55} , a stop command (Stop) is provided. When the stop command (Stop) is supplied, the recording unit 20 reads the previously supplied TOC0 information command (TOC0 information command).
It is determined that the processing according to (0info) has been completed, and assuming that there is no data after the end address corresponding to the second content, a process of deleting the remainder is performed.

[0145] Thus, at time t _56, the optical disc D, and the data which has been already recorded as if the third track with the data of U-TOC0 of the first and second tracks that had been recorded, the title Is "Hello"
And "morning" tracks on the U-TOC0.

FIG. 17 and FIG.
19 is a time chart of title information and the like supplied from the audio transmission unit 10 to the recording unit 20. FIGS. 17A and 18A show time charts of data supplied from the audio transmitting unit 10 to the recording unit 20, and FIGS. 17B and 18B show optical discs at respective times. The recording state of U-TOCs 1 and 4 of D is shown.

First, as shown in FIG.
At time _{61 when} no title command (Title) is supplied to U-TOC1 and U-TOC4 of
Only the titles of the first and second tracks recorded earlier are recorded.

[0148] The audio transfer unit 10 sends at time t _62, supplies the title of the first content. That is, the audio transmission unit 10 transmits the title command (Titl
e) together with the content number of ATRAC data,
The number of characters to be supplied and the title of this content "Hel
The character data of "lo" is supplied.

When the title of the first content is supplied, the recording unit 20 performs the U-TO based on the supplied information.
A process of generating information of C1 and U-TOC4 and recording the information on the optical disc D is performed.

If the number of characters in the title is larger than the specified number, the process is performed in a plurality of times. That is, four at a time
When only character data can not be supplied, as indicated at time t _63, firstly, to supply four characters of "Hell", followed at time t ₆₄ and supplies a "o".

[0151] Thus, at time t _65, the U-TOC1 and U-TOC4 of the optical disc D, the title corresponding to the first content is recorded.

[0152] Then the audio transfer unit 10 sends at time t ₆₆ shown in FIG. 18, supplies the title of the second content. That is, the audio transmitting unit 10 supplies the ATRAC data content number, the number of characters to be supplied, and the character data of the title “Morning” of the content, together with the title command (Title). When the title of the second content is supplied, the recording unit 20
Are based on the supplied information, U-TOC1 and UT
A process of generating information of OC4 and recording it on the optical disc D is performed.

[0153] Thus, at time t _65, the U-TOC1 of the optical disc D, the title corresponding to the second contents are recorded.

When the recording section 20 completes the recording processing of all titles, the audio transmission section 10
₆₈ Stop command (Stop) is supplied to end the process.

By performing such processing, in the audio dubbing system 1, the T
OC information can be recorded. That is, as shown in FIG. 19, the title recorded from the server 12 along with the first track whose title is “Emotion” and the second track whose title is “Dream” are recorded on the optical disc D as shown in FIG. The TOC information and ATRAC data of the third track of "Hello" and the fourth track of which the title is "Morning" can be recorded.

As described above, in the audio dubbing system 1, the audio data transmitting unit 10 transmits the track size of each track together with the ATRAC data, and the recording unit 20 transmits the optical disk D based on the track size.
The data stream recorded on the optical disk D is divided and the start address and end address of each track are
-Record in TOC. This allows the audio dubbing system 1 to efficiently record the track selected by the user on the optical disc D. Further, the recording unit 20 records the ATRAC data as one track according to the transmitted data stream, and records the start address and the end address of each track on the optical disc D by dividing the data stream of the one track. By doing so, the usage efficiency can be improved.

Next, an audio dubbing system according to a second embodiment of the present invention, which is a modification of the audio dubbing system 1 according to the above-described embodiment, will be described with reference to the drawings. In describing the audio dubbing system of the second embodiment, the same components as those of the above-described audio dubbing system 1 are given the same reference numerals in the drawings, and detailed description thereof will be omitted.

FIG. 20 is a block diagram illustrating an audio dubbing system 40 according to the second embodiment.

The audio dubbing system 40 includes a main controller 11, a server 12, and an operation input unit 13.
A display interface 14; a communication interface 43 serving as an interface with the telephone line network 41;
A satellite broadcast receiver 44 for receiving satellite broadcasts and the like via
An audio receiving unit 10a having a TOC memory 45 for storing TOC information and a recording unit 20 are provided.

This audio dubbing system 40
The audio receiving unit 10a receives ATRAC data transmitted via a transmission medium such as satellite broadcasting or a telephone line, and the recording unit 20 records the received ATRAC data on the optical disc D.

That is, the audio dubbing system 40 does not provide the content in a form in which the audio data is stored in a medium such as a so-called compact disc or audio tape, but instead provides the audio data to the optical disc D owned by the user. This is a system that records and provides music content to users. For example, a station,
The audio dubbing system 40 is installed at a store or the like to provide music contents to the user for a fee, or the audio dubbing system 40 is installed in a music studio or the like.
Can be used for content management.

First, the audio dubbing system 4
The outline of the content providing mode of content No. 0 will be described.

The audio receiving unit 10a of the audio dubbing system 40 has ATRA, which is audio data compressed according to the format of the optical disc D,
The C data is transmitted from, for example, an information transmitting base station serving as a main server via satellite broadcasting or a telephone line.

The user checks the contents that can be provided from the information transmission base station or the like serving as the main server on the display unit 14, and if there is a desired content, one or a plurality of Select content. Then, the user loads the optical disk D owned by the user into the recording unit 20 and performs an operation of starting recording using the operation input unit 13.

When the recording operation is performed by the user, the main controller 11 of the audio receiving unit 10a is started.
Transmits, for example, information of the selected content to the information transmitting base station serving as the main server via the communication interface 43. When the information transmitting base station or the like acquires the information of the content, it transmits ATRAC data corresponding to the content selected by the user to the audio dubbing system 40 using a telephone line, satellite broadcasting, or the like as a transmission medium. Then, the audio receiving unit 10a of the audio dubbing system 40 receives the transmitted ATRAC data, and the recording unit 20 records the ATRAC data supplied from the audio receiving unit 10a in a free area of the optical disc D.

The communication interface 4 of the audio dubbing system 40 for providing contents as described above.
Reference numeral 3 includes, for example, a modem or the like, an error correction circuit, or the like, separates the transmitted ATRAC data and the TOC information, and supplies them to the main controller 11. The communication interface 43 transmits information of the content selected by the user to an information base station or the like serving as the main server.

The satellite broadcast receiver 44 receives ATRAC data and the like broadcast from the information base station or the like serving as the main server, separates ATRAC data from TOC information,
It is supplied to the main controller 11.

[0168] ATRAC data and the like may be transmitted via a telephone line or satellite broadcasting, or may be transmitted via another transmission medium.

[0169] The TOC memory 45 stores the transmitted TOC.
The TOC information is temporarily stored until the information is written on the optical disc D.

Next, a transmission form of ATRAC data and TOC information provided to the audio dubbing system 40 will be described.

As a first transmission mode, as shown in FIG. 21A, after transmitting all ATRAC data,
C information is transmitted.

The ATRAC data transmitted through a transmission medium such as a telephone line or a satellite broadcast is supplied as one data stream of ATRAC data of a plurality of contents as shown in FIG. Main controller 1
1 supplies the ATRAC data of a plurality of contents supplied as one data stream to the recording unit 20 as it is, and the recording unit 20 records this data.

The TOC information transmitted later includes the data size indicating the data stream length of each content and U-TOC0 and U-TOC0 such as the track mode.
The information of TOC1 is supplied. And the recording unit 20 is 1
After the ATRAC data is recorded on the optical disc D as a data stream, the start address and the end address are recorded according to the data size of the ATRAC data of each content.

As the TOC information, U-TOC0 and U-TOC such as the track size and the track mode are used.
Not only the information of C1 but also related information such as kanji code title data, lyrics, text data such as liner notes, and image data such as jacket photos may be supplied.

[0175] The relevant information is transmitted by being included in the TOC area as follows, for example, and can be recorded in the TOC area.

U-TOC0 ------- Track information U-TOC1 ------- Title data (ASCII coat ゛) U-TOC4 ------- Title data (Kanji coat ゛) U-TOC5 ------- Text data (lyrics, liner notes) U-TOC6 ------- Image data (jacket photo) ATRAC data transmitted via the transmission medium is shown in FIG. As shown in ()), packets may be transmitted for each predetermined transmission capacity. At this time, ATRA
It is packetized according to the transmission method of the transmission medium irrespective of the division of the content of the C data.

In the second transmission mode, as shown in FIG.
C information is transmitted.

As the ATRAC data transmitted through a transmission medium such as a telephone line or a satellite broadcast, ATRAC data of a plurality of contents is supplied as one data stream as shown in FIG.

The TOC information transmitted at the same time as the ATRAC data is stored in the TOC memory 45 from the communication interface 43 or the satellite broadcast receiver 44 via the main controller 11. After the recording unit 20 records the ATRAC data on the optical disc D as one data stream, the recording unit 20 reads out the TOC information stored in the TOC memory 45, and reads the ATRA of each content.
The start address and the end address are recorded according to the data size of the C data.

As the TOC information, U-TOC0 and U-TOC0 such as the track size and track mode are used.
Not only the information of C1 but also related information such as title data of kanji code, text data such as lyrics and liner notes, and image data such as jacket photos may be supplied according to the first transmission mode. The same is true. In this way, by simultaneously transmitting the ATRAC data and the TOC information, it is possible to display the related information to the user using the display unit 14 or the like when the ATRAC data is being written to the optical disc D. it can.

ATR transmitted via a transmission medium
The AC data and the like may be packetized for each predetermined transmission capacity and transmitted as shown in FIG. At this time, the ATRAC data and the TOC information are packetized and transmitted in a time-division manner.

When transmitting ATRAC data through a satellite broadcast or a telephone line as described above, since the data is received by a plurality of terminals of the audio dubbing system 40, the data is sequentially transmitted at a constant rate. For this reason, the audio dubbing system 40 cannot perform bidirectional transmission / reception in which transmission is performed after waiting for each writing, but since writing is performed after temporarily storing data in the RAM 22 of the recording unit 20, even if the writing fails. Even if
Retry can be performed until the RAM 22 overflows.

However, if there is not much difference between the write rate and the transfer rate, or if writing fails continuously even if there is a sufficient difference, the data overflows from the RAM 22 and the transfer data is lost. I will.

For this reason, as shown in FIG. 23, the ATRAC data and the like transmitted to the audio dubbing system 40 can avoid writing failure by multiplexing and transmitting a plurality of identical data streams delayed by a predetermined time. doing. That is, in the audio dubbing system 40, the communication interface 43 or the satellite broadcast receiver 44 selects and receives the first data stream that arrives first. Then, when the writing of the first data stream fails and it is not possible to receive the first data stream, the second data stream transmitted late is selected, and the writing is performed with the first data stream. Restarts recording from the part where failed.

Note that the delay time between data streams is
Difference between write data and transmission rate and RAM of recording unit 20
Since the time until the RAM 22 overflows is obtained from the capacity of the RAM 22, the time is determined to be longer than that time.

Next, the audio dubbing system 4
The processing content of 0 will be described with reference to a flowchart.

First, the processing content when data is transmitted in the first transmission mode shown in FIG. 21 will be described with reference to the flowchart shown in FIG.

When the content is selected by the user and the information of the selected content is transmitted via the transmission medium, the audio dubbing system 40 proceeds to step S31.
Start processing from.

In step S31, the ATR transmitted from the information transmitting base station or the like via satellite broadcasting or a telephone line or the like
The AC data is received. Since ATRAC data is packetized and transmitted according to a predetermined transmission scheme, for example, the audio dubbing system 40 receives ATRAC data for each packet. Then, the communication interface 43 or the satellite broadcast receiver 44 performs decoding processing, error correction processing, and the like, and supplies the ATRAC data to the main controller 11.

In the following step S32, ATRAC
Write data. That is, the main controller 11 supplies ATRAC data to the recording unit 20, and the recording unit 20 records the ATRAC data on the optical disc D. Here, the processing in step S32 is the same as the processing in steps S11 to S17 shown in FIG. 13 described above, and the main controller 11
2 instead of obtaining ATRAC data,
The ATRAC data is obtained from the communication interface 43 or the satellite broadcast receiver 44 for the C data.

At the next step S33, ATRAC
It is determined whether the data reception has been completed. ATRA
If all the C data has not been received, step S31
The processing from step S31 to step S33 is repeated until all the ATRAC data is received and the data is written. If it is determined that all the ATRAC data has been received, the process proceeds to step S34.

At step S34, the TOC transmitted from the information transmitting base station or the like via satellite broadcasting or a telephone line or the like is used.
Receive information. And the communication interface 4
3 or the satellite broadcast receiver 44 performs a decoding process, an error correction process, etc., and sends the TOC information to the main controller 11.
To supply.

In the following step S35, TOC information is written. That is, the main controller 11
Supplies the TOC information to the recording unit 20, and the recording unit 20
The C information is recorded on the optical disc D. Here, the processing in step S35 is performed in step S35 shown in FIG.
The processing from step 18 to step S19 is the same, and the main controller 11 obtains the TOC information from the communication interface 43 or the satellite broadcast receiver 44 instead of obtaining the TOC information from the server 12.

In the following step S36, it is determined whether or not the reception of the TOC information has been completed. If all the TOC information has not been received, the processing from step S34 is repeated, and the processing from step S34 to step S36 is performed until all the TOC information is received and the data is written. Then, if it is determined that all the TOC information has been received, the processing is terminated.

Next, the processing content when data is transmitted in the second transmission mode shown in FIG. 22 will be described with reference to the flowchart shown in FIG.

When the content is selected by the user and the information of the selected content is transmitted via the transmission medium, the audio dubbing system 40 proceeds to step S41.
Start processing from.

In step S41, an ATR transmitted from an information transmitting base station or the like via satellite broadcasting or a telephone line or the like.
It receives AC data or TOC information. ATRAC
Since the data and the TOC information are transmitted, for example, in the form of a packet in accordance with a predetermined transmission method, the audio dubbing system 40 performs reception for each packet. Then, the communication interface 43 or the satellite broadcast receiver 44 performs a decoding process, an error correction process, and the like.

In the following step S42, it is determined whether the received data is ATRAC data or TOC information. If it is determined that the data is ATRAC data, the process proceeds to step S43. If it is determined that the data is TOC information, the process proceeds to step S44.

At step S43, ATRAC data is written. That is, the ATRAC data is supplied to the recording unit 20, and the recording unit 20
Data is recorded on the optical disc D. Here, the process of step S43 is performed in step S43 shown in FIG.
11 to the step S17.
2 from the communication interface 43 or the satellite broadcast receiver 44 instead of acquiring the ATRAC data from the
Acquire RAC data. After writing the ATRAC data to the optical disc D, the process proceeds to step S45.

In step S44, the TOC information is stored in the TOC memory 45. That is, in the audio dubbing system 40, the TORAC information is recorded after the ATRAC data is written on the optical disc D. The TOC information stored in the TOC memory 45 may be displayed to the user using the display unit 14 while the ATRAC data is being recorded on the optical disc D.

At subsequent step S44, it is determined whether or not reception of all data has been completed. If all the data has not been received, the processing from step S41 is repeated, and all the data is received, and the processing from step S41 to step S45 is performed until the data is written. And if it is determined that all data has been received,
Proceed to step S46.

At the subsequent step S46, TOC information is written. That is, the TOC information stored in the TOC memory 45 is recorded on the optical disc D. Here, the processing in step S46 is the same as the processing in steps S18 to S19 shown in FIG. 13 described above, and the main controller 11
Instead of acquiring the information, the TOC memory 45
Acquire C information.

In the following step S47, it is determined whether or not the writing of the TOC information has been completed. If all the TOC information has not been written, the processing from step S44 is repeated, and the processing from step S46 to step S47 is performed until all the TOC information is written. If it is determined that all the TOC information has been written, the process ends.

Next, the processing content when a plurality of identical data streams delayed by a predetermined time shown in FIG. 23 are multiplexed and transmitted will be described with reference to the flowchart shown in FIG.

When the content is selected by the user and the information of the selected content is transmitted via the transmission medium, the audio dubbing system 40 proceeds to step S51.
Start processing from.

[0206] In step S51, the audio dubbing system 40 selects the number 1 of the data stream number to be received. That is, a process of selecting a data stream to be transmitted first is performed.

In step S52, the ATR transmitted from the information transmitting base station or the like via satellite broadcasting or a telephone line or the like.
The AC data is received. The ATRAC data is transmitted, for example, in the form of a packet according to a predetermined transmission scheme, and thus the audio dubbing system 40 receives the packet. And the communication interface 43
Alternatively, the satellite broadcast receiver 44 performs decoding processing, error correction processing, and the like, and supplies ATRAC data to the main controller 11.

At the next step S53, ATRAC
Write data. That is, the main controller 11 supplies ATRAC data to the recording unit 20, and the recording unit 20 records the ATRAC data on the optical disc D. Here, the processing in step S53 is the same as the processing in steps S11 to S17 shown in FIG. 13 described above, and the main controller 11
2 from the communication interface 43 or the satellite broadcast receiver 44 instead of acquiring ATRAC data from
Acquire RAC data.

[0209] In the following step S54, the recording unit 20
It is determined whether the data stored in the RAM 22 has overflowed. The audio dubbing system 40 keeps the RAM 2 even when writing to the optical disc D fails.
2 can be retried until data overflows. For example, if writing fails continuously, data overflows from the RAM 22.
You lose the received data. That is, it is determined whether or not the data thus received overflows before being written to the optical disc D. If it is determined that the data has overflowed, the process proceeds to step S55. If it is determined that the data has not overflown, the process proceeds to step S58.

In the following step S55, ATRAC
It is determined whether the data reception has been completed. ATRA
If all the C data has not been received, the process proceeds to step S52.
The processing from step S52 to step S58 is repeated until all ATRAC data is received and the data is written. If it is determined that all the ATRAC data has been received, the process proceeds to step S59.

If it is determined in step S54 that the data in the RAM 22 has overflowed, the selected data stream number is incremented by one in step S55.

In the following step S56, ATRAC data of the data stream incremented by one is received. In a succeeding step S57, it is determined whether or not the ATRAC data received in the step S56 is already written data. If the ATRAC data is already written data, the process is repeated from the step S56. That is, the processing of steps S56 and S57 is repeated until data for which writing has failed due to occurrence of an error or the like is obtained. Then, upon receiving ATRAC data for which writing has failed due to occurrence of an error, the processing from step S52 is repeated.

When the reception of all ATRAC data is completed, in step S59, the TOC information transmitted from the information transmission base station or the like via satellite broadcasting or a telephone line is received. Then, the communication interface 43 or the satellite broadcast receiver 44 performs decoding processing, error correction processing, and the like, and stores the TOC information in the TOC memory 45.

In the following step S60, TOC information is written. That is, the main controller 11
Supplies the TOC information to the recording unit 20, and the recording unit 20
The C information is recorded on the optical disc D. Here, the process in step S55 is performed in step S55 shown in FIG.
The processing from step 18 to step S19 is the same, and the main controller 11 obtains the TOC information from the communication interface 43 or the satellite broadcast receiver 44 instead of obtaining the TOC information from the server 12.

In the following step S61, it is determined whether or not the reception of the TOC information has been completed. If not all the TOC information has been received, the processing from step S59 is repeated, and the processing from step S59 to step S61 is performed until all the TOC information is received and the data is written. Then, if it is determined that all the TOC information has been received, the processing is terminated. Although not described in this flowchart, if the process of writing the TOC information to the optical disc D fails, the process of updating the data stream number and receiving the next data stream may be performed. Of course.

Further, from step S51 to step S51
In the processing up to 61, a transmission mode in which a plurality of the same data streams delayed by a predetermined time are multiplexed and transmitted is applied to the processing when data is transmitted in the first transmission mode shown in FIG. The processing may be applied to the processing when data is transmitted in the second transmission mode shown in FIG.

As described above, in the audio dubbing system 40 according to the embodiment of the present invention, the data to be written on the optical disc D is received via a transmission medium such as a satellite broadcast, and the data can be written on the optical disc D. it can.

Further, in the audio dubbing system 40, failure of writing to the optical disc D can be recovered by receiving data in which a plurality of identical data streams delayed by a predetermined time are multiplexed.

The audio dubbing system 40 receives TOC information including related information such as kanji codes such as title data, text data such as lyrics and liner notes, and image data such as jacket photos. Related information can be recorded on the optical disc D. In addition, the related information can be displayed while the ATRAC data is being recorded on the optical disc D.

The audio receiving section 10a and the recording section 2
0 may be a transmission cable based on the IEEE 1394 system, for example.

[0221]

According to the present invention, the compressed audio program distributed from the information center and the related information relating to the distributed audio program are each divided into blocks and transmitted by time division multiplexing. By decoding the related information while receiving the audio program, the title name of the audio program being received, the image and photograph of the creator, the introduction article of the content creator, and the like can be displayed.

Further, the recording can be started quickly without notifying the transmitting side of the recordable remaining amount of the recording medium mounted on the receiving apparatus before the recording is started.

Further, while the sequentially compressed audio program and the related information relating to the distributed audio program are transmitted, the capacity of the compressed audio program to be recorded is received by decoding the related information. Before the recording operation is performed, the remaining capacity of the recording medium can be compared with the recording capacity of the compressed audio program that is being received before the recording operation is performed, so that it is possible to warn early that the remaining recording capacity is insufficient. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of an audio dubbing system to which the present invention has been applied.

FIG. 2 is a diagram showing a data structure on a magneto-optical disk used in the audio dubbing system.

FIG. 3 is a diagram showing a data structure on a magneto-optical disk used in the audio dubbing system.

FIG. 4 is a diagram illustrating a management area UT on the magneto-optical disk.
FIG. 3 is a diagram showing a data structure corresponding to OC sector 0.

FIG. 5 is a diagram showing a UT as a management area on the magneto-optical disk;
It is a figure showing the data structure of one slot on OC.

FIG. 6 is a diagram showing a data structure of a track mode on the U-TOC.

FIG. 7 is a diagram for explaining a link state of each slot on the U-TOC.

FIG. 8 is a diagram showing a UT as a management area on the magneto-optical disk;
FIG. 3 is a diagram showing a data structure corresponding to OC sector 1;

FIG. 9 shows a UT as a management area on the magneto-optical disk.
FIG. 4 is a diagram showing a data structure corresponding to OC sector 2;

FIG. 10 shows a management area U- on the magneto-optical disk.
FIG. 4 is a diagram showing a data structure corresponding to TOC sector 4.

FIG. 11 is a block diagram showing a specific configuration of a recording unit in the audio dubbing system.

FIG. 12 is a diagram illustrating an interface between an audio transmitting unit and a recording unit of the audio dubbing system according to the embodiment of the present invention.

FIG. 13 is a flowchart illustrating a dubbing process performed by a recording unit in the audio dubbing system.

FIG. 14 is a diagram showing management information of an audio program stored in a server of the audio dubbing system and management information of an audio program recorded on a magneto-optical disk.

FIG. 15 is a timing chart showing an operation of transmitting ATRAC data from an audio transmitting unit and recording the data on an optical disc by a recording unit in the audio dubbing system.

FIG. 16 is a timing chart of command data and the like exchanged between an audio transmitting unit and a recording unit when transmitting ATRAC data.

FIG. 17 is a time chart of command data and the like transmitted and received between an audio transmission unit and a recording unit when transmitting ATRAC data.

FIG. 18 is a time chart of command data and the like exchanged between an audio transmitting unit and a recording unit when transmitting ATRAC data.

FIG. 19 is a diagram showing contents recorded on a magneto-optical disk.

FIG. 20 is a block diagram illustrating a specific configuration of a receiving device including a recording unit of a distribution system to which the present invention has been applied.

FIG. 21 is a diagram illustrating a transmission form of ATRAC data and TOC information received by a receiving device in the distribution system.

[FIG. 22] ATRA in the above distribution system
It is a figure explaining the transmission form of time division multiplexing of C data and TOC information.

FIG. 23 shows ATRA in the above-mentioned distribution system.
It is a figure explaining other transmission forms of C data and TOC information.

FIG. 24 is a flowchart showing processing on the receiving device side when receiving ATRAC data and TOC information in the transmission mode shown in FIG. 21;

FIG. 25 is a flowchart showing processing on the receiving device side when receiving ATRAC data and TOC information in the transmission mode shown in FIG. 22;

26 is a flowchart showing processing on the receiving device side when receiving ATRAC data and TOC information in the transmission mode shown in FIG. 23;

[Explanation of symbols]

1, 40 audio dubbing system, 2 connection cable, 10 audio transmission unit, 11 main controller, 12 server, 13 operation input unit, 14 display unit, 2
0 recording unit, 32 system controller, 43 communication interface, 44 satellite broadcast receiver, 45 T
Memory for OC

Claims (13)

[Claims] 1. Blocking means for blocking a compressed audio program distributed from an information center and related information relating to the distributed audio program, and a compressed audio program blocked by the blocking means. Transmitting means for transmitting time-division multiplexing and related information, receiving means for receiving a compressed audio program and related information transmitted from the transmitting means in time-division multiplexing, and receiving the compressed information received by the receiving means. Means for separating the audio program and the related information separated by the separating means, recording means for recording the compressed audio program separated by the separating means on a recording medium, and notification to notify the user of the related information separated by the separating means. And a distribution system. 2. The distribution system according to claim 1, wherein the related information is data size information of a compressed audio program to be distributed. 3. The distribution system according to claim 1, wherein the related information is title information of a compressed audio program to be distributed. 4. The distribution system according to claim 1, wherein the related information is image information on a compressed audio program to be distributed. 5. The distribution system according to claim 3, wherein said notifying means displays a title name based on title information on the distributed compressed audio program. 6. The distribution system according to claim 4, wherein said notifying means displays an image based on image information relating to said distributed compressed audio program. 7. A comparison means for comparing a data size of a compressed audio program to be distributed, which is related information separated by the separation means, with a recordable remaining capacity of the recording medium, and 4. A warning is issued by the notifying means if the data size of the distributed compressed audio program is equal to or larger than the recordable remaining capacity of the recording medium based on the comparison result.
The delivery system described. 8. The distribution system according to claim 1, wherein said transmission means transmits a predetermined audio program and an audio program to be transmitted subsequently with a predetermined period of delay. 9. A storage unit for temporarily storing the compressed audio program separated by the separation unit, a recording unit for recording the compressed audio program read from the storage unit on a recording medium, Detecting means for detecting a storage capacity, wherein when the audio program stored in the storage means exceeds a predetermined amount, the next audio program transmitted with a delay is stored in the storage means. 9. The distribution system according to claim 8, wherein: 10. The distribution system according to claim 9, wherein said delay time is longer than a storage time of the audio program stored in said storage means. 11. A compressed audio program distributed from an information center and related information related to the distributed audio program are respectively blocked, and the blocked compressed audio program and related information are transmitted by time division multiplexing. Receiving the compressed audio program and related information transmitted by the time division multiplexing, separating the received compressed audio program and related information, and storing the separated compressed audio program on a recording medium. A distribution method which records and notifies the user of the related information. 12. A compressed audio program and related information relating to the audio program are each blocked, and transmission data is received from an information center for transmitting the blocked compressed audio program and related information by time division multiplexing. A receiving device for receiving a compressed audio program and related information transmitted by time division multiplexing from the information center, and separating the compressed audio program and related information received by the receiving unit. A receiving unit comprising: a separating unit that separates the compressed audio program separated by the separating unit on a recording medium; and a notifying unit that notifies the user of the related information separated by the separating unit. . 13. A compressed audio program and related information relating to the audio program are respectively blocked, and transmission data is received from an information center for transmitting the blocked compressed audio program and related information in a time-division multiplex manner. A receiving method, comprising: receiving a compressed audio program and related information transmitted from the information center by time division multiplexing; separating the received compressed audio program and related information; Recording the recorded audio program on a recording medium and notifying the user of the related information.