KR100655386B1 - Recording Entry Method of Optical Recording Medium - Google Patents

Abstract

A recording entry method of an optical recording medium of the present invention, comprising: a) initiating recording preparation and attempting to enter recording; b) searching for an autonomous address to determine if it is writable; c) retrieving the number of retries when failing to establish an independent address in step b) and retrieving the number of retries, and stopping recording entry when the number of retries exceeds a predetermined threshold value 1; And d) when the number of retries does not exceed a predetermined threshold value 1 in step c), if the number of retries exceeds a predetermined threshold value 2, the method for acquiring the independent address into a wobble mode. Modifying and repeating step a).

Record Entry, Optical Recording Media, DVD-RW

Description

Recording entry method of optical recording medium             

1 illustrates a recording entry method of a general optical recording medium.

2 illustrates a recording entry retry method of a general optical recording medium.

3 is a flowchart illustrating a recording entry retry method of a general optical recording medium.

4 is a flowchart illustrating a recording entry retry method of an optical recording medium according to an embodiment of the present invention.

The present invention relates to a recording entry method of an optical recording medium. In particular, by providing a retry method for recording entry failure during bad disk recording, better recording performance can be obtained by shortening the recording entry time and reducing the recording failure rate. A recording entry method of an optical recording medium.

Recently, optical recording media and magneto-optical recording media have been developed and commercialized as recording media for recording various kinds of information such as video and audio information. Among them, optical recording media include CD-ROM (Read Only Memory) and DVD (Digital Versatile Disk) -ROM, including generalized CD (Compact Disc), CD-R (Recordable) and DVD-R. WORM (Write Once Read Memory) type discs, such as, and rewritable discs such as CD-RW (Rewritable) and DVD-RAM (Random Access Memory), are being spread or developed. Recently, optical recording media and magneto-optical recording media have been developed and commercialized as recording media for recording various kinds of information such as video and audio information. Among them, optical recording media include CD-ROM (Read Only Memory) and DVD (Digital Versatile Disk) -ROM, including generalized CD (Compact Disc), CD-R (Recordable) and DVD-R. WORM (Write Once Read Memory) type discs, such as, and rewritable discs such as CD-RW (Rewritable) and DVD-RAM (Random Access Memory), are being spread or developed.

All DVD discs store records in three parts: lead-in, user data, and lead-out. The lead-in and lead-out portions inform the playback apparatus of the boundary of the portion where data is recorded. In this section, users cannot record data arbitrarily, and information necessary for disk operation is stored.

There are two ways to write to a DVD-R: Disc-at-Once and Incremental Writing. Disk-on-one is a method of writing data of the entire capacity to a disk at once. In this way, the computer must send data continuously to the disk at 11.08 or 22.16Mbps to avoid buffer underrun errors. DVD-R drives have buffer memory to minimize buffer underrun errors. If the buffer memory is set to 6.75MB, the error can be absorbed even if the data transfer is interrupted for about 4 seconds. If a lossless linking technique is introduced that can continuously write data even when a buffer underrun occurs, a buffer memory size of 2 MB is sufficient.

In the disk-at-once method, the lead-in, data area, and lead-out are recorded in order. This is a track-at-once method that is generally used in the case of CD-R (write the data area first and then lead-in). , Record the lead-out). Disc-at-once method Commonly used to create discs such as titles or software packages.

Subsequent writing is similar to the packet writing method used by the CD-R, which can be recorded on a part of a DVD disc and later added again. Each recording requires a minimum capacity of 32kB and this unit is called an Error Connection Code (ECC) Block.

In this manner, the disc is incomplete until the end of data recording. This is because only the data closed by read-out after writing can be read by the drive.

1 shows a recording entry method of a general DVD disc. On the disc record side, the physical addresses are engraved from the innermost to outermost. This is expressed as increasing sequentially from the physical address a1 is shown at the top.

The second stage represents the data recorded on the DVD disk recording surface, followed by writing to sequentially record from the inner circumference, and in the case of FIG. 1, it is recorded from d1 to d10, and is subsequently recorded from d11.

 The third column represents free-run addresses. In order to record the recorded data to the corresponding physical address to be recorded when the disc is recorded, it is necessary to accurately detect the physical address at that time. However, since it is difficult to guarantee that the correct physical address is always detected during recording (when recording a disc that is difficult to detect signals or has poor characteristics due to poor driving conditions such as high temperature or low temperature), data can be stably recorded even in such cases. The self-address is used as a reference clock signal synchronized with the physical address. This allows a more reliable recording even in the unstable state of the servo, which may be during recording.

 The self address can be generated from the physical address and the recorded data. The case of creating the self address from the physical address is called wobble mode, and the data is generated from the recorded data. Is referred to as a high frequency mode (RF mode). Subsequently, in the case of writing, since there is always data recorded at the front end of the point to be recorded, it is easy to obtain an independent address therefrom, and the data is recorded in the high frequency mode.

Consider a case where data of d11 is subsequently recorded at a point of a11. If recording is to be made at the point of a11, recording preparation starts from a6 and waits for an independent address to be established. The signals of d6 and d7 are detected smoothly so that an independent address is established and a reference clock is automatically incremented after c8.

 Thereafter, it is checked whether or not the normal operation state in which recording can be started is started at the point a10. If it is determined that it is normal, the recording can be successfully performed from a11. In this way, writing can be performed.

3 is a flowchart showing a recording entry method of a conventional optical recording medium. The existing algorithm determines whether or not to start recording, and if it is determined that the recording is not possible, the recording preparation is started again. If such a case is repeated more than 20 times, it is determined that recording is impossible and generates an error.

In this case, there is no way to record data on the optical recording medium.

An object of the present invention is to solve the above problems, it is possible to reduce the record entry time and reduce the write failure rate and to obtain better recording performance by selecting another retry method for write entry failure when recording a bad disk There is provided a method for entering a recording of an optical recording medium.

The recording entry method of the optical recording medium of the present invention comprises the steps of: a) initiating recording preparation and attempting to enter recording; b) searching for an autonomous address to determine if it is writable; c) retrieving the number of retries when failing to establish an independent address in step b) and retrieving the number of retries, and stopping recording entry when the number of retries exceeds a predetermined threshold value 1; And d) when the number of retries does not exceed a predetermined threshold value 1 in step c), if the number of retries exceeds a predetermined threshold value 2, the method for acquiring the independent address into a wobble mode. Modifying and repeating step a).

In the present invention, the step b) may further include the step of recording data, if it is determined that the self-address is established and can be recorded.

In the present invention, the step d) preferably further includes repeating the step a) if the number of retries does not exceed a predetermined threshold value 2.

In the present invention, the initial self address acquisition method is preferably a high frequency mode.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In adding reference numerals to components of the following drawings, it is determined that the same components have the same reference numerals as much as possible even if displayed on different drawings, and it is determined that they may unnecessarily obscure the subject matter of the present invention. Detailed descriptions of well-known functions and configurations will be omitted.

4 is a flowchart illustrating a recording entry method of an optical recording medium, particularly a DVD-RW, according to an embodiment of the present invention.

The above embodiment schematically shows a method of switching the self-addressing method into the wobble mode when the number of retries following the entry of the record exceeds 10 times.

Step 401 is a recording preparation start process, in which a recording command is performed on the host or main computer and transmits predetermined data.

Step 402 is a process of attempting to enter a record, and waits for the self address to be established using the high frequency mode of generating the self address using the recorded data.

Step 403 is a process of determining whether or not recording is possible. In step 402, it is checked whether a self-address is established.

Step 404 is a step of determining the number of retries. If a self-address is not established in step 403, and if it is determined that recording is not possible, the number of attempts to enter the current recording is counted. The count result is compared with a predetermined threshold 1 to determine whether the count is exceeded. The threshold 1 may be implemented in various ways depending on the DVD specification and taste, but in the present invention, it is preferable to determine 20. If the number of retries exceeds 20, the DVD generates an error message that it is determined that the address cannot be frequently established and ends (S408).

In step 405, the number of retries is re-determined. In step 404, the predetermined threshold 1 is not exceeded, but it is determined whether the predetermined threshold 2 is exceeded. The step is a condition for changing a method of obtaining an independent address. The threshold value 2 may also be implemented in various ways according to the DVD specification and preferences as in the threshold value 1 of step 404. It is desirable to decide. If the number of write entry retries has not exceeded ten times, step 402 is repeated.

Step 406 is a step of switching the self-address acquisition method to the wobble mode. When the number of retries in step 405 exceeds a predetermined threshold 2, the self-address acquisition method is executed in the high frequency mode. After changing to the wobble mode, the step 402 is repeated. When the wobble mode is changed, the self address is established from the physical addresses a6 to a10, and when the self address is established, recording starts from the point a11.

Step 407 is a process of starting recording, and when a self-address is established, recording resumes from a predetermined point.

As described above, it has been described with reference to the preferred embodiment of the present invention, but those skilled in the art various modifications and changes of the present invention without departing from the spirit and scope of the present invention described in the claims below I can understand that you can.

As described above, according to the present invention, the probability of success of retries can be improved by diversifying the source of the signal, which can be the basis of the self address, into a high frequency signal and a wobble signal. It can increase.

Claims (4)

a) initiating recording preparation and attempting to enter the recording; b) searching for an autonomous address to determine if it is writable; c) retrieving the number of retries when failing to establish an independent address in step b) and retrieving the number of retries, and stopping recording entry when the number of retries exceeds a predetermined threshold value 1; And d) when the number of retries does not exceed a predetermined threshold value 1 in step c), when the number of retries exceeds a predetermined threshold value 2, the method for obtaining an independent address is changed to a wobble mode And repeating step a). 2. The method of claim 1, wherein said step b) further comprises the step of recording data if it is determined that a self-address is established and capable of recording. The method of claim 1, wherein the step d) further comprises repeating the step a) if the number of retries does not exceed a predetermined threshold value 2. The recording entry method of an optical recording medium according to claim 1, wherein the initial self address acquisition method is a high frequency mode.

Images