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Decoding device and method

A technology of a decoding device and a decoding method, which is applied in the field of product code decoding devices, and can solve problems such as high number of erasures, reduced decoding efficiency of known decoding devices, and inability to perform erasure decoding

Active Publication Date: 2011-11-30
REALTEK SEMICON CORP
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Problems solved by technology

In fact, in the row or column that cannot be decoded correctly, not all the data is wrong. The known method marks the entire row and column that cannot be decoded correctly as erasure, which will make the number of erasures relatively high
Especially when a group error (Burst Error) occurs on a DVD, the number of rows and columns that cannot be correctly decoded will easily exceed the number of errors that can be corrected by erasure decoding. Known methods will make erasure completely impossible. In addition to decoding, it greatly reduces the decoding performance of known decoding devices

Method used

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Embodiment Construction

[0029] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed descriptions of three embodiments in conjunction with the accompanying drawings.

[0030] Before the present invention is described in detail, it should be noted that in the following description, similar components are denoted by the same numerals.

[0031] refer to figure 2 , the first embodiment of the decoding device 2 of the present invention is electrically connected to a reading device 3 and includes an updating and erasing data generating unit 21 and a decoding unit 22 . The reading device 3 reads a read data from a storage medium 4, and during the read process generates original erased data that marks known error locations in the read data. The method for the reading device 3 to generate the original erasing data can refer to the method disclosed by the inventor of the present application in US Patent Publication N...

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Abstract

A decoding device and a method for using the same. The decoding device includes a decoding unit and an updating and erasing data generating unit. The decoding unit receives read data and updated erase data, and generates decoded data including a flag information according to the read data and the updated erase data. The updating and erasing data generation unit receives the flag information and an original erasing data, and generates the updating and erasing data according to the flag information and the original erasing data. The original erasing data is generated by a reading device when reading a storage medium. The decoding device can improve decoding performance and use erasure more effectively.

Description

technical field [0001] The present invention relates to a decoding device and method, in particular to a product code (ProductCode) decoding device and method. Background technique [0002] refer to figure 1 , in a diversified digital disc (Digital Versatile Disc, DVD), stored data is decoded for error correction in units of a data block (Block) 1 . The data block 1 is 182×208 bytes in size, and includes sixteen data sectors (Sector) 11, an outer code parity (Parity of Outer-code, PO) area 12 and an inner code parity (Parity of Inter -code, PI) area 13. Each data segment 11 has a size of 172×12 bytes and includes a 4-byte error detection code (Error Detection Code, EDC) for checking the correctness of the data segment 11 . The outer code parity area 12 is 172×16 byte size, and the inner code parity area 13 is 10×208 byte size, and the outer code parity and the inner code parity generally utilize the Reed-Solomon Product Code (Reed-Solomon Product Code) , RSPC) to generat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B20/10G11B20/18
Inventor 郭协星陈建志
Owner REALTEK SEMICON CORP
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