KR20030004523A - Method for resumming of writing of an optical disk - Google Patents

Abstract

PURPOSE: A method for resuming write of an optical disk is provided to stably write data at the optical disk by detecting ATIP by searching areas prior to a control information detecting area. CONSTITUTION: A method for resuming write of an optical disk includes the steps of receiving a write resuming message(S401), confirming whether ATIP(Absolute Time In Pre-groove) information is searched in the range of a control information detecting area, searching and detecting the ATIP information written at the optical disk in areas prior to the control information detecting area if the ATIP information is not searched(S402-S403), detecting time information of a write resuming block by counting blocks from the ATIP information detected block to the block right before the write resuming block(S404-S405), and executing a write operation from the write resuming block if the time information of the write resuming block is detected(S406-S407).

Description

Recording method of optical disc {METHOD FOR RESUMMING OF WRITING OF AN OPTICAL DISK}

The present invention relates to a method of resuming recording of an optical disc. More particularly, when ATIP (Absoulte Time In Pre-groove) is not detected in the control information detection area of the recording resumption block, the pickup returns to the previous area of the control information detection area. The present invention relates to a method of resuming recording of an optical disc, which detects ATIP information and records data transmitted from a host computer to the optical disc using the detected ATIP information.

Recently, optical discs capable of recording one or more times, such as CD-R and CD-RW discs, are widely used for backing up data in computer systems. An optical record player for recording or reproducing data for such a recordable optical disc (CD-R / RW) receives data to be recorded from a host computer and records the data on the optical disc using a pick up device. Done.

However, during the data recording, the pickup may be moved to an undesired position due to a shock or the like, or the user may record some data and stop recording, and then record the remaining data later. It happens. In such a case, when resuming the recording, there is a case where the ATIP information of the recording resumption block cannot be detected due to factors such as warping or scratching of the optical disc. Here, ATIP serves as time information for a corresponding track and delivers information necessary for driving a recordable optical disc.

Hereinafter, a case where ATIP information is normally recorded and a case where ATIP information is damaged will be described with reference to FIGS. 1 and 2.

Fig. 1 shows a form of data normally recorded on an optical disc. The above data form is provided in an optical disc standard. Fig. 2 shows a form of data when recording is interrupted while recording predetermined data on the optical disc. It is a figure which shows.

When the optical recorder records data on the optical disk, it detects a sync signal (ATIP Sync) as shown in Fig. 1B and then records the data.

That is, when data is to be recorded on the optical disc, a sub-code sync as shown in FIG. 1C must be recorded in 0 to 2 EFMs from the time when the synchronization signal is detected. In addition, at this point in time, the data (EFM Data) is recorded on the optical disk, and the actual recording form on the optical disk has a 1-EFM data format as shown in FIG.

By the way, a defective disk is often found in which no ATIP information is detected in the optical recorder. As described above, since a bad disk does not detect ATIP information and thus time information of a recording resume position is not detected, a problem occurs that the recording operation is impossible.

The present invention searches for ATIP information in the control information detection area in order to resume the recording operation on an optical disk on which recording has been interrupted in order to effectively solve the above-described problems of the prior art, and if the search result does not detect ATIP information, Searches for the area before the control information detection area to detect ATIP information, calculates the time from the detected ATIP block to the recording resume block, and records the optical disc performing the recording operation from the encoder block of the block immediately before the recording resume block. The purpose is to provide a resumption method.

1A to 1F are waveform diagrams of detection signals indicating the data format of an optical disc recorded normally.

2A to 2D are waveform diagrams of detection signals indicating data formats of abnormally recorded optical discs.

3 shows a recording system according to a preferred embodiment of the present invention.

4 is a flowchart showing a recording method according to a preferred embodiment of the present invention.

<Description of reference numerals appearing in the drawing>

301: pickup 302: RF signal processing unit

303: DS skin 304: encoder / decoder

305: Micom

The present invention for achieving the above technical problem comprises the steps of: (A) receiving a recording operation resume message;

(B) checking whether ATIP information is searched for in the control information detection area;

(C) searching for and detecting ATIP information recorded on the optical disc in an area before the control information detection area when the ATIP information is not retrieved in the step (B);

(D) counting blocks from the block where the ATIP information is detected to the block immediately before the recording resume block, and detecting time information of the recording resume block; And

(E) if time information of the recording resume block is detected, performing a recording operation from the recording resume block.

Hereinafter, a method of resuming recording of an optical disc according to a preferred embodiment of the present invention will be described with reference to FIGS. 3 and 4.

3 shows a recording system according to a preferred embodiment of the present invention.

As shown in Fig. 3, the recording system of the present invention includes a pickup 301, an RF signal processor 302, a DS 303, an encoder / decoder 304 and a microcomputer 305.

The pickup 301 optically accesses the disk to record data or to read data already recorded, and to read ATIP information recorded on the optical disk.

The RF signal processing unit 302 performs linear equalization processing and waveform shaping processing such as amplification and noise removal, phase synchronization, and the like of the high frequency signal supplied from the pickup 301.

The digital signal processor (DSP) 303 is a digital signal processor for detecting optical disk data and SUB-Q code data from the RF signal processor 302. In this case, the DS skin 303 detects the SUB-Q code data based on the already recorded data in order to find the portion where the recording error occurs after the SUB-Q code data is generated.

The microcomputer 305 determines whether a packet is written from the SUB-Q code data and sets parameters for determining a physical block address of link blocks.

In addition, the microcomputer 305 controls the pickup 301 when a portion where a recording error occurs on the optical disc is recognized so that data can be recorded on the recording resume block.

The encoder / decoder unit 304 decodes or encodes the optical disc data supplied from the DS skin 303 under the control of the microcomputer 305 and performs error correction.

4 is a flowchart showing a recording method according to a preferred embodiment of the present invention.

As shown in FIG. 4, when an optical disc in which finalization is not completed is inserted into the optical recording player, the microcomputer 305 receives a message for resuming the recording operation from the host computer (S401).

In this case, the microcomputer 305 searches for ATIP information in order to record predetermined data received from the host computer at a desired location (S402). In such a case, the recording resumption position of data is after the ATIP Sync of ATIP imprinted on the optical disc is detected. In general, if data is normally recorded on the optical disc, a sync signal (ATIP Sync) and a sub-code sync signal (Sub-Code Sync) are output. Therefore, the method checks whether the ATIP information is searched for (s403).

In the step s403, in the case of the defective optical disc in which the ATIP information is not detected in the control information detection area, the recording operation cannot be performed because the pickup 301 does not recognize the time information of the recording resume block.

In this case, the control information detection area means a block from which recording is resumed, that is, from a recording resume block to a block 75 blocks before the recording resume block.

On the other hand, in the case of a bad disk in which the ATIP information is not detected in the control information detection region as described above, the pickup 301 is controlled to search the previous area of the control information detection region and detect the ATIP information (s404).

Then, the number of blocks from the block in which the ATIP information is detected to the immediately preceding block of the recording resume block is calculated, and the time is measured (S405).

On the other hand, in step S403, when ATIP information is retrieved from the control information detection area, the number of blocks from the block where the ATIP is detected to the immediately preceding block of the recording resume block is calculated (S405).

Then, the recording resume message is recorded in the encoder block of the block immediately before the recording resume block (s406), so that the pickup 301 performs a recording operation from the recording resume block (s407).

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. . Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

As described above, according to the method of the optical disk of the present invention, when ATIP is not detected in the control information detection area, the data is stably recorded on the optical disk by searching the previous area and detecting the ATIP. It works.

Claims (3)

(A) receiving a recording operation resume message; (B) checking whether ATIP information is searched for in the control information detection area; (C) searching for and detecting ATIP information recorded on the optical disc in an area before the control information detection area when the ATIP information is not retrieved in the step (B); (D) counting blocks from the block where the ATIP information is detected to the block immediately before the recording resume block, and detecting time information of the recording resume block; And (E) if the time information of the recording resume block is detected, performing a recording operation from the recording resume block. The method of claim 1, And the control information detection area is an area from the recording resume block to a block of 75 blocks before the recording resume block. The method of claim 1, wherein step (D) And recording a recording resume message in the encoder block of the block immediately preceding the recording resume block.