KR20060072739A - The method of recording and recovery recording breaking point in case of power fail in dvd-r/rw - Google Patents

Abstract

The present invention relates to a recording breakpoint recording method and a recovery method when a power failure occurs during DVD-R / RW media recording, comprising: searching whether a current recording state of a data is in a buffer underrun mode; Storing information on the area recorded so far in a memory; Searching for whether a power failure has occurred; And storing, in the memory, flag information indicating occurrence of a power failure.

In addition, searching for a request for re-recognition of the disk; Retrieving whether the disc currently inserted is the same as the previous disc; Checking flag information indicating whether a power failure has occurred and checking an address where the flag information is stored to perform a search for an unrecorded point; And recording data from the unrecorded point.

DVD, power failure, recorder, flag

Description

DVD-R / RW} The Method of Recording and Recovery Recording Breaking Point in case of Power fail in DVD-R / RW             

1 is a flowchart illustrating a recording breakpoint recording method when a power failure occurs during DVD-R / RW media recording according to an embodiment of the present invention.

2 is a flowchart illustrating a method of recovering a recording break point when a power failure occurs during recording of a DVD-R / RW media according to an embodiment of the present invention.

The present invention relates to a recording breakpoint recording method and a recovery method in the event of a power failure during DVD-R / RW media recording. The present invention relates to a method for easily finding a recording breakpoint in case of occurrence and for facilitating recovery in a short time.

In the case of DVD-R / RW media, information on the area recorded so far is recorded in recording management data (hereinafter referred to as 'RMD') format 1 or format 3 depending on the recording method. In this case, the RMD area is limited, so the RMD is not updated every recording. Instead, in the restricted overwrite mode, the capacity of the recorded area increases by 4 MB (128 ECC blocks) and the recording stops at the next recordable address. The last recorded address is registered in the last sector number of the RZone #n item of the valid format 3 RMD field 3. (The number of times that one RMD set can be modified is about 135000 times. Since there are five RMD sets, the total number of RMDs that can be updated on one disc is 140,000.) [DVD-RW Spec. See Annex U, see Annex Z]

For Incremental Recording, update RMD Format 1 if the difference between the sector number of the sector last recorded in Alzone #i and the "sculpture of the last recorded Alzone #i" registered in the last RMD is 8192 or more. do. [DVD-RW Spec. See Annex Z]

However, if a power failure occurs suddenly during recording in this manner, the RMD cannot be updated, and thus an unrecorded area must be found through the RECD from the previous recording point. In this case, it takes a long time to find the whole disk area. In the limited recording mode, search for 4M byte area. In incremental recording mode, search for 16M byte area. To update the RMD.

If the previous record is out of the search area, damage is dealt. DVD recorders can record up to six hours and record the entire disc without starting recording and ending recording, resulting in a significant amount of data loss in the event of a power failure.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a method of easily finding a recording breakpoint in the event of a power failure, so as to facilitate recovery in a short time.

The recording breakpoint recording method at the time of power failure during DVD-R / RW media recording of the present invention comprises the steps of: searching whether the recording state of the current data is in the buffer underrun mode; Storing information on the area recorded so far in a memory; Searching for whether a power failure has occurred; And storing, in the memory, flag information indicating occurrence of a power failure.

In the present invention, the memory preferably uses EEPROM.

In the present invention, it is preferable that the information on the area recorded so far includes address information on the last area in which the last data is recorded.

According to the present invention, a method of recovering a recording breakpoint when a power failure occurs during recording of a DVD-R / RW media includes: searching for a request for recognizing a disc; Retrieving whether the disc currently inserted is the same as the previous disc; Checking flag information indicating whether a power failure has occurred and checking an address where the flag information is stored to perform a search for an unrecorded point; And recording data from the unrecorded point.

In the present invention, the search for the unrecorded point is preferably performed in an area after the address stored in the memory.

In the present invention, a method for searching whether the same as the previous disc is used preferably uses a tray operation.

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.

1 is a flowchart illustrating a recording breakpoint recording method when a power failure occurs during DVD-R / RW media recording according to an embodiment of the present invention.

Referring to FIG. 1, a recording breakpoint recording method when a power failure occurs during DVD-R / RW media recording will be described.

Step 101 is a process of searching whether the current recording state of the disc is operating in the buffer underrun mode. In the case of a DVD recorder, while recording data at the back-end rather than without stopping recording, Since the loader operates in the buffer underrun mode, it detects whether the buffer underrun mode is engaged.

Step 102 is a process of storing the area information recorded so far in the memory. If the buffer underrun mode is caught in step 101, the information of the area recorded on the disc is stored in the memory until the buffer underrun mode is applied. It is obvious that the information of the area recorded on the disc can be variously implemented according to the level of those skilled in the art, but it is preferable that the address information of the area where the data was last recorded is necessarily included. The memory may also be implemented in various ways, but in the present invention, it is preferable to use an EEPROM.

Steps 103 to 104 are steps of storing the flag information when a power failure occurs, and simultaneously storing the flag information in the memory when the power failure occurs in step 103. The flag information is preferably stored at the same time as the information on the occurrence of the power failure.

So far, we have seen how to store information about recording breakpoints in the event of a power failure in a DVD-R / RW. Hereinafter, a method of recovering from recording interruption using the recorded information will be described.

2 is a flowchart illustrating a method of recovering a recording break point when a power failure occurs during recording of a DVD-R / RW media according to an embodiment of the present invention.

Referring to FIG. 2, a method of recovering a recording break point when a power failure occurs during DVD-R / RW media recording is as follows.

Step 201 is a process of retrieving whether the disc is re-recognized. When rewrite is requested by the host, the disc information should be extracted from the disc currently inserted.

Step 202 is a process of searching whether the same disk is the same as the previous disk. Since the current EEPROM stores information on the recording stop area of the disk immediately stopped recording, if another disk is inserted and recorded, the EEPROM is stored. Stored information is meaningless. Therefore, if step 101 is not the same as the disc before, step 101 is repeated. The method of checking whether the same media as the previously failed power media is achieved by checking whether a tray operation has occurred.

Step 203 is a process of checking the flag information and searching for an unrecorded point from an address stored in the EEPROM. Since the present invention would have experienced a power failure during the next write after entering the buffer underrun mode, it is desirable to search for a write breakpoint in the region behind the address recorded in the EEPROM.

Step 204 is a process of recording data after the retrieved recording breakpoint.

As described above, although described with reference to the preferred embodiment of the present invention, those skilled in the art will be variously modified and modified within the scope of the present invention without departing from the spirit and scope of the present invention described in the claims below. It will be appreciated that it can be changed.

As described above, according to the present invention, it is possible to reduce the time required for the recovery process in the event of a power failure during recording, and to prevent the loss of already recorded data.

Claims (6)

In the recording breakpoint recording method in case of power failure during DVD-R / RW media recording, Searching whether the recording state of the current data is in the buffer underrun mode; Storing information on the area recorded so far in a memory; Searching for whether a power failure has occurred; And storing, in the memory, flag information indicating the occurrence of a power failure in the memory during recording of a DVD-R / RW media. The method of claim 1, wherein the memory uses an EEPROM. The recording break point recording method of claim 1, wherein the information on the area recorded so far includes address information on the last area in which the last data is recorded. . In the method of recovering a recording breakpoint when a power failure occurs during recording of DVD-R / RW media, Searching for a request for recognizing the disc; Retrieving whether the disc currently inserted is the same as the previous disc; Checking flag information indicating whether a power failure has occurred and checking an address where the flag information is stored to perform a search for an unrecorded point; And recording data from the unrecorded point. The recording breakpoint recovery method of a power failure during DVD-R / RW media recording. 5. The method of claim 4, wherein the search for the unrecorded point is performed in a region after the address stored in the memory. 5. A method as claimed in claim 4, wherein the method for searching whether the disc is identical to the previous disc uses a tray operation or not.

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