BCH decoder, decoding method thereof and ECC system
A BCH decoder and equation technology, applied in the field of BCH decoder and decoding method, ECC system, can solve the problem of slow bit error rate, high power consumption of ECC system, multi-redundant power consumption of BCH decoder, etc. problem, to achieve the effect of reducing power consumption
Active Publication Date: 2020-05-08
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology
[0004]
However, with the continuous increase of memory capacity, the complexity and power consumption of ECC systems are also increasing
Since the bit error rate is relatively low at the beginning of memory use, and the increase of the bit error rate is a very slow process, therefore, it will cause the BCH decoder to be in an unsaturated working state for a long time, that is, cause the BCH decoder to A large number of circuits are doing useless work, which leads to more redundant power consumption when the BCH decoder is running, which makes the power consumption of the ECC system larger
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[0039] As mentioned in the background, the power consumption of the BCH decoder in the existing ECC system is relatively large. refer to figure 2 , figure 2 It is a schematic structural diagram of a BCH decoder in the prior art. The data to be decoded first calculates the syndrome polynomial through the syndrome calculation module 20, and then calculates the error position polynomial through the error position equation generation module 21 in combination with the coefficients of the syndrome polynomial Finally, combined with the coefficients of the error position polynomial equation, the error position is obtained through the error position solving module 22, and combined with the original data in the data FIFO (First Input First Output, data cache) 23 to perform XOR, and the error is corrected and output together.
[0040] Based on this, the traditional BCH decoder, whether it is the error correction ability of the adjoint calculation module, the error correction ability o...
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The invention provides a BCH decoder, a decoding method thereof and an ECC system. An error correction capability control module is used for controlling a syndrome calculation unit with correspondingerror correction capability in a syndrome calculation module to be in a working state according to a pre-obtained error rate, and controlling an error position equation generation module to carry outoperation of corresponding iteration times; an error number judgment module is used for obtaining the number of errors contained in the to-be-decoded data according to the coefficient of an error position polynomial equation output by the error position equation generation module, and outputting the number of errors to the error correction capability control module; and the error correction capability control module controls the corresponding number of Chien search operation units in an error position solving module to be in a working state according to the number of errors, that is, the errorcorrection capability of the BCH decoder can be flexibly set according to the error rate obtained in advance, so that the power consumption of the BCH decoder and the ECC system is greatly reduced.
Description
technical field [0001] The present invention relates to the technical field of memory, and more specifically, relates to a BCH decoder, a decoding method thereof, and an ECC system. Background technique [0002] With the continuous development of science and technology, various memories have been widely used in people's daily life and work. However, the data read from the memory is not completely correct under the limitation of the performance of the production material and the level of manufacturing technology, that is, the memory has a certain bit error rate. [0003] Based on this, the prior art discloses a kind of ECC (Error Correcting Code, error checking and correction) system, such as figure 1 As shown, the ECC system includes a BCH encoder 10 and a BCH decoder 11 . Before the original data is stored in the memory 12, it needs to be encoded by the BCH encoder 10, and then the encoded data is stored in the designated location of the memory 12. Similarly, the data rea...
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IPC IPC(8): H03M13/15
CPCH03M13/152
Inventor 王颀李子夫霍宗亮叶甜春
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI