TWI390511B - Method and apparatus for correcting errors in data rom optical disc - Google Patents

Description

Method and apparatus for correcting errors in data-only memory discs

The present invention relates to the field of optical disc playback technology, and in particular to a method and apparatus for correcting optical disc data errors.

The optical disc is not in the protection of the protective cover like the magnetic disc, and it is inevitably subjected to various kinds of damage, and the imprint such as scratches, stains, deformation and the like which affect the reading of the optical disc data is formed on the disc surface. These marks are used to make the disc information read by the disc playback device incorrect, and the disc data may be unreadable. Therefore, in the field of optical storage technology, the error correction of the optical disc data read after the optical disc is damaged is an important research content.

In the prior art, the correction of the disc data error is generally accomplished by an error correction algorithm. For example, an error correction on the line of an ECC (Error Correction Code) data block is performed at the front end of the optical disc playback apparatus. If several bytes of data in the data read from the disc are destroyed, it can be estimated and restored based on the undestroyed data adjacent to it, or directly replaced with corrupted data (such as mosaic data). Information so that the disc playback can continue without interruption.

Usually, an error correction algorithm is suitable for a specific type of data error type, and it is impossible for a CD player to install all the error correction algorithms. In the face of a variety of types of optical disk data errors, the area error correction resources in the optical disk playback device are not exhausted. Handle. In order to solve the problem of the error correction algorithm, the existing network CD player can find a suitable error correction algorithm by using a link network to solve the corresponding disc data error. However, such network error correction technology still cannot avoid the limitation of the error correction algorithm, because in addition to being suitable for a specific type of data error, the error correction algorithm can generally only be applied to the case where the amount of data destroyed is relatively small, for a large segment. In the case where the continuous data is destroyed, the error correction algorithm can only be sighed. In addition, the data estimated and restored according to the error correction algorithm is generally difficult to completely restore the damaged data to the original level, and therefore it is impossible to achieve the desired effect of the playback of the optical disc.

For the measures to cover up the damaged data with obscured data, when there is less information to be destroyed, the slight jump or discontinuity of the disc playback screen does not affect the overall playback effect, but if there is more information to be destroyed, the large segment The large section of the data is replaced by mosaic data, and the disc playback effect will be very bad.

It can be seen from the above that whether the corrupted data is used to estimate the corrupted data, and the corrupted data is used to cover up the corrupted data, it is difficult to ensure that the optical disc data is restored to the perfection level, and the corresponding disc playback effect is inevitably affected. Especially in the case that the disc data is damaged, the disc may not be played.

Therefore, it is necessary to provide a method and device for correcting the error of the optical disc data, so as to be able to repair various types of data errors, and enable the playback effect to achieve the playback effect that can be achieved before the data is destroyed.

The problem to be solved by the present invention is to provide a method and apparatus for correcting optical disc data errors to overcome the deficiencies in the prior art.

According to an embodiment of the present invention, a method for error correction of optical disc data is provided, comprising the steps of: obtaining description information of an error data read from a disc; and sending an error correction request information to a network server according to the description information. The network server stores backup data corresponding to the data on the optical disc, the error correction request information includes requesting to download backup data corresponding to the error data; and replacing the error by using the downloaded backup data correspondingly Information for playing the disc.

According to an embodiment of the present invention, there is provided an apparatus for error correction of optical disc data, comprising: an obtaining means for acquiring description information of an error data read from a disc; and a requesting means for using the description information according to the description Sending error correction request information to a network server, wherein the network server stores backup data corresponding to the data on the optical disk, and the error correction request information includes requesting to download backup data corresponding to the error data; And a replacement device, configured to replace the downloaded backup data with the error data for playing the optical disc.

Other objects and attainments of the present invention will be apparent from the description and appended claims appended claims

With the development of network technology, the network server can completely establish data backup for the released optical disc, and can transmit a larger amount of data to the user terminal when the data transmission bandwidth and time permit. Based on this, the concept of the present invention is as follows: First, the description information of the damaged optical disc data, such as the storage address or the playing time of the erroneous data (the address information for the wrong ECC block) is obtained. Then, the network server is requested to download the backup data corresponding to the error data to replace the error data read from the optical disc. The downloaded backup data, together with the correct data read from the disc, will be sent back to the corresponding data processing to play the disc. With this technical solution, the integrity and accuracy of the optical disc data can be guaranteed, and the disc playback can achieve the effect that the optical disc data is not destroyed.

1 is a schematic diagram of a disc playback system in accordance with an embodiment of the present invention. The optical disc 110 has a unique identification information (ID). By identifying the information thereby, the optical disc service provider can determine whether the optical disc 110 is issued by or should be served by it. The optical disc 110 also includes web link information for the optical disc service provider that provides service for the use of the optical disc 110. With the corresponding network link information, the CD player 120 (such as a Blu-ray disc player and other network CD player) can be linked with the corresponding server to communicate the corresponding information and materials.

After the optical disc 110 is inserted into the optical disc playback device 120, the device 120 reads the information information on the optical disc 110 and performs error detection on the read optical disc data.

If it is detected that there is an error in the read disc data, and the data error exceeds the range that can be repaired by the regional error correction resource (such as the area or the error correction algorithm downloaded to the area), for example, it cannot be read due to serious damage. The disc playback device 120 will link to the web server 140 via the network 130 according to the link information of the optical disc service provider provided on the optical disc 110, and request to download the backup data corresponding to the corrupted data on the optical disc 110. To repair damaged data.

After receiving the error correction request from the optical disc playback device 120, the network server 140 first discriminates the optical disc 110 according to the identification information (ID) of the optical disc to determine whether the optical disc 110 belongs to a serviceable optical disc. If the optical disc 110 belongs to a disc that can provide a service, the server 140 will retrieve the database corresponding to the optical disc 110 in the optical disc data backup library 150, and then send and error data according to the request of the user terminal, that is, the optical disc playback device 120. Corresponding backup data. The disc service provider can charge the user the corresponding cost according to the request of the client and the service provided.

The disc playback device 120 replaces the corrupted error data read from the optical disc with the received backup data, and then performs the data playback processing together with the correct data read out and the error data that can be repaired by the regional error correction resource. Play the disc. The area error correction resource can repair the data including the corresponding error detection device can not detect the data error.

Depending on the degree of damage to the disc and the error correction capability of the user-side disc playback device, the amount of backup data requested by the client for error correction is different. If the amount of data transmitted is large and the bandwidth is small, the download of the backup data may not be consistent with the progress of the disc playback, which may affect the playback effect, which may result in discontinuous playback. Therefore, a buffer device can be disposed in the user terminal, that is, the optical disc playback device 120, for pre-downloading the optical disc data, so that the backup data of the substitute error data can be downloaded to the buffer device for backup in advance, so as not to affect the disc playing process. .

With the above measures, the playback effect of the optical disc can be guaranteed under the condition that the amount of data to be downloaded is large and the bandwidth is not very wide.

2 is a flow chart of a method for error correction of optical disc data according to an embodiment of the present invention. First, the disc playback device reads the material on the optical disc (step S210). The optical disc data read by the drive device in the disc playback device from the optical disc is generally an error correction code ECC (Error Correction Code) data block. The ECC block is a block of data added with a check code after compression of the program material, whereby the data can be error-corrected at the transmission time and a certain fault tolerance rate is allowed.

Then, error detection is performed on the read disc data (step S220). Because the ECC data block read by the front end of the optical disc playback device can be corrected online according to the check code therein, when an error occurs in an ECC data block, if the error is within the allowable range of the ECC fault tolerance rate, then The drive of the disc playback device will perform an online error correction on the ECC block and mark the corrected ECC block as the correct material. For ECC blocks with errors that exceed their fault tolerance, they are marked as error data. As a general rule, if an ECC data block is marked as an erroneous data block, the data block will be directly discarded, and in the present invention, the replacement method will be used to correct it.

Then, based on the detected error data, the disc playback device acquires the description information of the error data (step S230). Each ECC data block marked as erroneous has its own unique identification information, such as the start address and the end address. This tag information can be used to identify the ECC block data and the compressed program material corresponding to the ECC data block.

Then, the CD player sends an error correction request message to the corresponding network server by using the network link information of the network service provider provided on the CD (step S240), and the request information includes: the identification information of the CD. (ID), link information of the disc player, description information of the error data, and request to download the backup data corresponding to the error data to replace the error data. Internet service provider's web link information can also be stored on other media, such as the package description of the disc. The description of the error data includes the information of the ECC data block. If the corresponding network error correction needs to be charged, the corresponding network error correction request information should also include cost payment information.

The corresponding network server sends the backup data corresponding to the error data to the optical disc playback device according to the error correction request.

The disc playback device will use the replacement error data corresponding to the received backup data (step S250). The received backup data can be buffered and stored in the disc playback device to ensure seamless playback of the disc.

Finally, the disc playback device plays the disc based on the backup data downloaded from the network and the correct data read from the disc (step S260). After the backup data and the correct data read from the optical disk are decompressed, the corresponding decoding device is performed to obtain a program data stream, and then the broadcast program is output.

The method of downloading backup data from the network is incorrectly corrected. It is not limited to the area that cannot be repaired. It can also be an area that can be repaired. For example, the error correction effect of the area error correction resource or the repair speed cannot meet the disc playback requirements.

By the above method, the playback effect of the optical disc can be prevented from being damaged or the area cannot be repaired or the repair effect is not satisfactory, thereby ensuring a good playback effect of the optical disc.

3 is a block diagram of an apparatus 300 for optical disc data error correction in accordance with an embodiment of the present invention. As shown in FIG. 3, the error correction device 300 includes an error detection device 310 for error detection of data read from the optical disc. The front end of the disc playback device marks the ECC data block that exceeds the fault tolerance rate as an error material.

The error correction device 300 also includes an acquisition device 320 for obtaining description information of the error data. If the error detection device 310 detects an ECC data block error, the device 320 will obtain the description information of the error data, such as the start address, the end address, the play time, and the like of the data.

If the network error correction method requires charging, try to use the regional error correction resource error correction to reduce user expenses. However, if the error repair effect is poor or the repair time is long, the playback effect should be made through the network. Correction.

The disc error correction device 300 also includes a request device 330. The requesting device 330 sends an error correction request message to the network server of the optical disc content service provider according to the description information of the detected error data. The error correction request information includes: identification information (ID) of the optical disc, link information of the optical disc playback device, and description of the error data. The error correction request information may also include: a request to download the backup data corresponding to the error data for error correction, and a cost payment situation in the case where the error correction cost is required.

The disc error correction device 300 also includes a buffer storage device 340. The amount of error correction data downloaded from the network may be relatively large, and the data transmission bandwidth may be relatively small, so that the error correction data cannot be processed at the same speed as the data directly read from the optical disc, so The error correction data downloaded in the network can be pre-downloaded to the buffer storage device 340 before being played back to ensure seamless playback of the optical disc. The error correction data can be downloaded during playback, but it should be ensured that the corresponding error correction data is already stored in device 340 as needed by the playback process.

The disc error correction device also includes a replacement device 350 for replacing the corresponding error data with the downloaded error correction data. In order to ensure normal playback of the data, the error data should not be transmitted backwards, but the downloaded backup data and the correct data read from the optical disc and the error data repaired by the regional error correction resource are transmitted backwards. The error data needs to be replaced with the downloaded error correction data and then transmitted backward.

With the above device 300, the error correction capability of the optical disc playback device is enhanced, and the corrected error can be achieved in an intact state. The backup data downloaded from the network can be stored in the disc playback device for later playback.

4 is a block diagram of a disc playback device 400 in accordance with an embodiment of the present invention. The optical disc playback device 400 reads the optical disc data from the optical disc by the reading device 410, performs network error correction by the optical disc error correcting device 300, and then decodes the data in the decoding device 420, and finally uses it for disc playback.

FIG. 5 is a block diagram of a disc playback apparatus 500 for performing network replacement error correction at the front end according to an embodiment of the present invention. Let's take the Blu-ray Disc player as an example. After the Blu-ray Disc player driver 504 reads the Blu-ray disc material, it decodes the read ECC data block in the ECC decoding device 506.

After the ECC data block is decoded, the erroneous ECC data will be error corrected by the error correction device 300 through the network, and the compressed backup data of the program downloaded from the network is switched by the switching device 510 and the correct data from the optical disk. Transfer backwards and perform processing such as decoding to play the disc. The switching device 510 in FIG. 5 may be part of the replacement device 350 in the device 300 for implementing replacement of the backup data downloaded in the network with error data.

The error-corrected data is decoded by the data decoding device 530 by the buffer device 520, such as decoding of MPEG compressed data, and the finally decoded data is transmitted to the output display device 540 to play the corresponding program.

The present invention has been described in connection with the embodiments, and it is obvious that many alternatives, modifications, and variations are apparent to those skilled in the art in light of the foregoing description. The spirit and scope of the patent application scope.

110. . . Disc

120. . . Disc player

130. . . network

140. . . Web server

150. . . Disc data backup library

300. . . Error correction device

310. . . Error detection device

320. . . Acquisition device

330. . . Request device

340. . . Buffer storage device

350. . . Replacement device

400. . . Disc player

410. . . Reading device

300. . . Disc error correction device

420. . . Decoding device

500. . . Disc player

504. . . Blu-ray read-only drive

506. . . ECC decoding device

510. . . Switching device

520. . . Buffer device

530. . . Decoding device

540. . . Display output device

300. . . Error correction device

The invention will be further explained in detail by reference to the accompanying drawings. 1 is a schematic diagram of a disc playback system according to an embodiment of the present invention; FIG. 2 is a flowchart of a disc data error correction method according to an embodiment of the present invention; FIG. 3 is a disc data error correction according to an embodiment of the present invention. Figure 4 is a block diagram of a disc playback apparatus in accordance with an embodiment of the present invention; and Figure 5 is a block diagram of an optical disc playback apparatus in accordance with an embodiment of the present invention. Throughout the drawings, the same reference numerals are used to refer to the same or similar features.

Claims (12)

A method for correcting optical disc data error, comprising the steps of: a) obtaining description information of an error data read from a disc and linking information for accessing a network server of one of the service providers of the optical disc, the optical disc Having identification information; b) sending error correction request information including the description information to the network server via a network based on the link information, wherein the network server stores backup data corresponding to the data on the optical disk, The error correction request information includes requesting to download the backup data corresponding to the error data and the identification information for determining whether the error correction service should be provided to the optical disc in one of the network server judgment devices; and c) The error data is replaced with the backup data downloaded from the web server and corresponding to the error data to play the disc using the backup data downloaded from the web server. The method of claim 1, wherein the description information includes at least one of: a start address of the error data, an end address of the error data, and a play time of the piece of the error data to be played. The method of claim 1, wherein the link information of the network server is stored on the optical disc. The method of 2 or 3, further comprising the step of: d) buffering and storing the backup data downloaded from the network server. A disc data error correction device includes: an obtaining device for acquiring the read error data from a disc Descriptive information and link information for accessing a network server of one of the service providers of the optical disc, the optical disc having identification information; a requesting device for transmitting the web server to the web server based on the link information Sending error correction request information including the description information, wherein the network server stores backup data corresponding to the data on the optical disc, the error correction request information includes requesting to download the backup data corresponding to the error data and The identification information for determining whether the optical disc should be provided with an error correction service in one of the network server determining means; and a replacement means for downloading from the network server and corresponding to the error data The backup data is replaced with the error data to play the disc using the backup data downloaded from the web server. For the device of claim 5, the description information includes at least one of: a start address of the error data, an end address of the error data, and a play time of the piece of the error data to be played. The device of claim 5 or 6, further comprising: a buffer storage device for buffering and storing the backup data downloaded from the network server. The device of claim 5 or 6, further comprising: a detecting device for detecting an error data in the data read from the optical disc. A network server for error correction of optical disc data, comprising: a receiving device, configured to send, according to a link information, a network server for accessing one of the service providers of the optical disc having the identification information Receiving a disc error correction request information from an error correction device, the error correction request information including identification information and description information of an error data read from an optical disc; and a storage device for storing data on the optical disc Corresponding backup data; a judging device for judging whether the disc should be provided with an error correction service based on the identification information; and a capturing device for extracting corresponding backup data from the storage device according to the description information; And a sending device, configured to send the retrieved backup data to the error correction device via the network to replace the error data. The network server of claim 9, wherein the description information includes at least one of: a start address of the error data, an end address of the error data, and a play time of a segment of the error data to be played. A disc playback device comprising: a reading device for reading optical disc data from the optical disc; and the optical disc data error correcting device as claimed in claim 5. The device of claim 11, wherein the description information includes at least one of: a start address of the error data, an end address of the error data, and a play time of the piece of the error data to be played.