DE19655115B4 - Optical disc recording method for digital data - storing data frames on both sides of discs formed in data blocks with first block providing control information - Google Patents

Abstract

The mass optical storage disc, i.e. CD-ROM, has digital data stored on both surfaces [208,209] of the disc as a continuous data frame [207]. The data frame consists of blocks of information that each have a synchronising signal [201], an identification flag [202], a block address [203] and the main data block [204]. The start of the data frame has a control block [205], which has synchronising data and a block address. This is followed by a disc identification flag and disc information regarding the configuration of the disc.

Description

The The present invention relates to digital signal reproduction methods and a disc reproducing apparatus, and more particularly such a method and Device for Reproductions of a digital signal in the form of a data block a plate and designed for access from a host computer and to play back the digital signal from the plate.

known manner For example, a CD-ROM (CD-Read Only Memory) is referred to as a disk the digital signals in units of one data block from this Type are recorded. Similar to in "Nikkei Byte", September 1994, Page 146, described in the CD-ROM data blocks, the are built from pure data and their block addresses, in the direction outward in the order of the innermost track on the recording surface of the Recorded plate. If on such a plate on which such Data recorded using the above technique, according to a Command is accessed by the host and they are played back become, are with the access command a start block address and a transfer block length and a desired block of data is accessed and this according to one such command and data are reproduced.

Recently Plates, each consisting of two interconnected sub-plates whose recording surfaces are readable from one side are plates with an upper and a lower recording surface whose recording surfaces from one side are readable, and plates, each consisting of two with each other linked sentences are constructed of upper and lower recording surfaces of a page are readable, standardized. For example, reference is made to this. on the headline "Confidence in Unique Standards of DVDs ", Nikkei Sangyo Shinbun, February 24, 1995 and the headline "Second Stage of Struggle for DVD Standards ", Nihon Keizai Shinbun, April 20, 1995.

If a digital signal using the above-mentioned technique to any one these disks are recorded with a plurality of recording surfaces The host will only be considered as independent of the disks for each recording surfaces recognized. To enable that on all recording surfaces is accessed, it is necessary that the interface over which Data to / from the host is sent / received, changed and thus the known interface, as it is, can be Not used.

The mentioned above Techniques have the problem that every time a Recording surface, which is to be played, is changed to before access and Play the innermost introductory area to read it a lot of time needed to resume access.

It It is therefore an object of the present invention to provide a digital signal recording method and to provide a disc reproducing apparatus, who are capable of all recording surfaces present in the disk at high speed access and reproduce a digital signal, the existing Interface as it is.

These The object is achieved by a device according to claim 1 and a method according to claim 2 solved.

DE 40 23 148 A1 discloses a method for allocating logical sectors in a magnetic disk device using a sector servo system.

In DE 38 28 519 A1 For example, there is disclosed a disc for recording digital information and a method for laser guidance in recording on the disc by means of a laser.

EP 0 593 032 A2 describes a method of managing recording areas on a disc-like recording medium.

In A digital signal recording method becomes a data frame constructed, the n (denotes a natural number) data blocks (or Data block), each containing a synchronization signal, the on a first and a second, on a plate present Digital signal recording surface are recordable and from a single side of the disk are readable, wherein each block of data from a synchronization (sync) signal containing the Boundary between the two data blocks indicates a block address, indicating the address of a data block on the recording medium, and Data is composed.

Further, the head of the data frame is provided with an introductory block of the same type as the data block containing information consisting of the range of block addresses recorded on each of the recording surfaces of the disc, the configuration of the data frame, and a flag to the method of reproducing this data to identify, is composed. The introductory block and the data blocks of block addresses 1 to m (where m is less than a natural number n) of the block address Data frames are recorded on the first recording surface of the disk, and data blocks of block addresses (m + 1) to n are recorded on the second recording surface. The plate has a multilayer structure with the corresponding recording surfaces. The data blocks 1 to m are arranged outwardly from the innermost track on the first recording surface, and the data blocks (m + 1) to n are arranged inwardly of the outermost track on the second recording surface to allow data blocks to be continuously tracked ,

A Reproduction device includes Means for processing one in a predetermined format on the Recorded digital signal, means for sending / receiving of commands and data to / from a host, means for controlling the entire device according to one Command obtained from the transmitting / receiving means, means for moving a signal receiver to a desired position on the plate, Means for controlling the focus of the pickup and for selectively accessing on the recording surfaces, Means for controlling the rotational speed of a plate motor, Means for detecting and recognizing in the information in the Introductory block contained area of block addresses that recorded on each of the recording surfaces of the disc are the configuration of a data frame to be recorded and a flag to identify a method of rendering such data, Means for detecting the block address of a reproduced data block, Means for calculating a block address at which the reproduction is made in accordance with a Command from the host ends, and means for generating a command, the access to the disk and playback of a signal from the plate according to the information, which was obtained by the detection and recognition of the flag, controls the detected block address and the result of the calculation.

According to one such structure, since successive block address the respective on all recording surfaces allocated to the disk is applied to all recording surfaces the plate at high speed using the known Interface accessed and reproduced.

Other Objects, features and advantages of the invention will be apparent from the following detailed description of the embodiments of the invention in conjunction with the associated Drawings clearly. Show it:

1 the structure of an embodiment of a digital signal recording method and a reproducing apparatus according to the present invention;

2 the structure of one in the embodiment of the 1 used data frame;

3 the structure of an introductory block 205 from 2 ;

4 the structure of a disk identification flag 210 from 2 ; and

5 a flowchart showing an algorithm for signal processing in the embodiment of 1 indicates.

A preferred embodiment The present invention will be described below with reference to FIG the drawings described.

1 shows an embodiment of a disk reproducing apparatus according to the present invention in a block diagram. reference numeral 1 denotes an optical disk having multi-layer recording surfaces (two layers or more); 2 a plate motor; 3 a constant linear velocity (CLV) motor controller; 4 an optical pickup capable of tracking a certain surface of the multi-layer recording surfaces by focus change; 5 a preamplifier; 6 a pickup motion controller; 7 a focus control; 8th a digital signal processing circuit (processor); 9 an interface; 10 an interface bus; 11 a host; 12 a system controller; 13 a disc information detection / recognition unit; 14 a block address detector; 15 a transfer end block address calculation unit; and 16 an access / playback control. The functions of the elements 15 and 16 can be realized by reading programs stored in a medium such as a ROM or a floppy disk and executing the programs by a processor.

In 1 contains the optical disk 1 Digital signals recorded over the first and second recording surfaces of the disk, which are on the main computer 11 to be transmitted and readable from one side. The plate 1 is at a constant linear velocity through the plate motor 2 rotated by the CLV engine control 3 is controlled so that a digital signal from the optical pickup 4 from the plate 1 is reproduced. At this time, by the pickup motion control 6 a tracking control of the optical pickup 4 created and the focus control is through the Fokussteue tion 7 when one of the first and second recording surfaces is selected and accessed.

The structure of the optical disk 1 and the digital signal to be recorded will be described below with reference to FIGS 2 to 4 described.

As in 2 shown is a data block corresponding to a sector as a minimum unit on the disk 1 is recorded from a sync signal 201 indicating the boundary between the two data blocks, a recording area identification flag 202 identifying a region on the disc in which a data block is to be recorded, a block address 203 , which specifies the address of the data block on the disk, and data 204 composed.

As described above, the disc has the first and second recording surfaces readable from one side. N data blocks are arranged in the order of recording on the disk, and consecutive addresses "1" to "n" are at corresponding addresses 203 the data blocks stored. The introductory block 205 with an in 3 The structure shown is provided at the head of the array of data blocks to thereby assemble a data frame.

The introductory block 205 that indicates the composition information has a structure similar to that of the data block. disk information 206 is stored in a data area, a disk identification flag 210 with a structure of 4 is in part of a scope of disk information 206 and a frame header address "0" is at a block address 203 saved.

When thus produced consecutive data frames 207 on the plate 1 are recorded, the data blocks including the introductory block at the block addresses "0" to "m" (m is a natural number smaller than n) from the innermost track on the first recording surface 208 recorded to the outside. The data blocks at the addresses (m + 1) to n become from the outermost track on the second recording surface 209 recorded inside.

A flag "11" then becomes in the disk identification flag 210 stored, a first recording surface end address 211 indicating the address of a data block last recorded on the first recording surface, and a recording block number 212 indicating a frame number n recorded on the disk becomes part of the disk information area 206 recorded.

It a single optical disk is formed, the first and second of which recording surfaces superimposed on each other and recorded or recorded in the format described above are.

The reproduction of digital data from the disk 1 is explained below with reference to the block diagram of 1 and the flow chart of 5 described.

In 1 and 5 before playing the recorded data on the innermost track on the first recording surface of the disc 1 with the picker 4 accessed the introductory block 205 (Step 501 in 5 ), predetermined signal processing including detection of the sync signal 201 and an error correction is made in the digital signal processor 8th performed, and the information in the disk information 6 is detected in the disc information detection / detection circuit 13 detected and detected (step 502 ). The decoded disk information becomes the interface 9 fed, then the plate information to the main computer 11 via the interface bus 10 according to a predetermined protocol (step 503 ) feeds. The main computer 11 sends an access command, a start block address i, which starts to access the block data, and a transfer block number j to the interface 9 in response to the received disk information and according to a predetermined protocol (step 504 ).

If the interface 9 a command from the host 11 receives, controls the access / playback control 16 the access and the reproduction according to the disc identification flag 210 on the previously detected disk information 206 ,

If the detected information flag 210 from the flag "11" which is a recording format used in the invention (step 505 ), provides the access / playback control 16 a control command to the system control 12 to render j blocks of consecutive addresses starting with the start block address i on the disk. The system control 12 then controls the CLV motor control circuit 3 and the pickup motion control 6 to access / play (steps 513 and 514 ). The rendered data then becomes the host computer 11 via the digital signal processor 8th , Interface 9 and interface bus 10 Posted.

If the detected identification flag 210 Is "11", it is determined that the plate after the Procedure of 2 was recorded or recorded. At step 506 the transfer start block address i is compared in height with the block address m of the outermost track of the first recording surface by detecting the first record end address 211 of the introductory block to select a recording surface at which access should be started. If i is greater than m, the block address at which access is to be started is present on the second recording surface. Thus, the focus of the pickup is changed (step 507 ), the jth data block is accessed and reproduced from that of the start address i on the second recording surface (steps 513 and 514 ). In order to change the focus, the conventional technique disclosed, for example, in "Nikkei Byte", September 1995, pages 129 to 130, in particular 2 , be used.

If i is not larger than m, the start block address i exists on the first recording surface. Thus, the transfer end address calculation unit calculates 15 the block address (i + j) where reproduction ends on the basis of the start block address i and the transfer block number j. The result of the calculation (i + j) is obtained with the recorded block number n obtained by detection of the recorded block number 212 in the access / playback control unit 16 was compared. If (i + j) is greater than n, playback stops halfway and the inability to play the digital signal is over the interface 9 the main computer 11 communicated.

The result of the calculation is calculated with the block address m of the outermost track on the first recording surface at step 508 compared. If (i + j) is not larger than m, it is decided that all the data blocks to be reproduced are on the first recording surface. Thus, the jth data block is accessed from the block address i and reproduced (steps 513 and 514 ).

If (i + j) is greater than m, it is decided that the data block to be reproduced exists in succession over the first and second recording surfaces. In this case, the data blocks are first accessed at a block address i on the first recording surface, and are continued to reproduce until a block address m by the block address detector 14 (Steps 509 . 510 ) is detected. When the block address m is detected, the focus of the pickup is changed to access the second recording surface and thus a data block at the address (m + 1) existing on the outermost track on the second recording surface (step 511 ) to detect the block address (m + 1) (step 512 ). Access to and playback of the data blocks starting at the block address (m + 1) is then reopened (step 513 ) until the data block of the end block address (i + j) is reproduced (step 514 ). The block 500 , the steps 505 to 513 includes, fulfills the functions of the elements 15 and 16 from 1 , The programs that follow the respective steps in the block 500 are stored in the recording medium as mentioned above.

As to be described above in the embodiment when a digital signal is recorded on a disk whose first and second recording surfaces of one page thereof, n blocks of data passing across all of the recording surfaces of the Plate are recordable, arranged in a recording sequence, and the head of the array of n data blocks is provided with an introductory block, contains the disk information, provided in order to put together a data frame. The introductory block and the data blocks the block addresses 1 to m are from the innermost track on the first recording surface outward recorded and the blocks at the addresses (m + 1) to n are from the outermost track on the second recording surface recorded inside. Since the consecutive block addresses over all the recording surfaces assigned to the disk is thus applied to all of the recording surfaces of the Disk accessed and reproduced while the conventional interface is used.

The reproducing apparatus detects disc information recorded in the introductory block and controls the system controller 12 in accordance with the detected information, thereby accessing and reproducing information in the disc recorded in the present invention.

If the data blocks continuously over the first and second recording surfaces in the recording method this embodiment are reproduced, the amount of movement of the pickup minimized, thereby providing a high-speed access to the second recording surface to achieve.

While in the embodiment a disk having first and second recording surfaces readable from one side has been illustrated, the present invention is not limited to this specific case. For example, the present invention is applicable to disks having three or four side-readable surfaces. In this case, when the data blocks to be recorded continue from the second recording surface to the third recording surface The data blocks from the innermost track on the third recording surface are assigned to the outside for recording or reproduction purposes.

The structure and location on the plate identification flag 210 and the storage locations of the end address 211 the first recording surface and the recording block number 212 that is included in the disk information are not limited to the specific embodiment, and may be modified depending on various disk types.

The Directions of recording the data frame in the first and second recording surfaces are not limited to those in the embodiment are shown. The arrangement to be used has the extent of movement of the Reproducer to between the recording surfaces minimize. For example, you can consecutive data blocks from the utmost Track recorded inward on the first recording surface and from the innermost track on the second recording surface Outside to be recorded.

Claims (2)

Device for playing on a plate ( 1 ) stored digital signals, wherein - the disk ( 1 ) at least a first and a second recording surface ( 208 . 209 ), - the digital signals as data frames ( 207 ) and the data frame ( 207 ) at least n data blocks (n is a natural number), block addresses to the data blocks of the data frame ( 207 ) are assigned; M data blocks of the n data blocks (m is a natural number and 0 <m <n) on the first recording surface ( 208 ) are recorded; The remaining (n-m) data blocks of the n data blocks on the second recording surface ( 209 ) are recorded; and - an introductory block ( 205 ) at the head of the data frame ( 207 ), the disk information ( 206 ), in which - the number of recording surfaces ( 210 ), - an end data block address ( 212 ) of the first recording surface ( 208 ), and - a recording block number ( 211 ) containing the number n of data blocks stored on the disk and thus the end of the data frame ( 207 ), the reproducing apparatus comprising: - a device ( 13 ) for detecting the disc information contained in the introductory block ( 205 ) is included; - An institution ( 14 ) for detecting the block addresses in the data blocks to be reproduced; and a control device ( 12 . 16 ) for controlling access to the disk ( 1 ) and the reproduction of the recorded data in accordance with the information detected by the disc information detecting means and the detected block address. Method of playing on a disc ( 1 ) stored digital signals, wherein - the disk ( 1 ) at least a first and a second recording surface ( 208 . 209 ), - the digital signals as data frames ( 207 ) and the data frame ( 207 ) at least n data blocks (n is a natural number), block addresses to the data blocks of the data frame ( 207 ) are assigned; M data blocks of the n data blocks (m is a natural number and 0 <m <n) on the first recording surface ( 208 ) are recorded; The remaining (n-m) data blocks of the n data blocks on the second recording surface ( 209 ) are recorded; and - an introductory block ( 205 ) at the head of the data frame ( 207 ), the disk information ( 206 ), in which - the number of recording surfaces ( 210 ), - an end data block address ( 212 ) of the first recording surface ( 208 ), and - a recording block number ( 211 ) containing the number n of data blocks stored on the disk and thus the end of the data frame ( 207 ), the method comprising the steps of: - detecting the plate information contained in the introductory block ( 205 ) is included; - detecting the block addresses in the data blocks to be displayed; and controlling the access to the disk ( 1 ) and reproducing the recorded data in accordance with the detected disc information from the introductory block and the detected block address.