Decoding circuit and decoding method based on Viterbi algorithm
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United States of America Patent
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Feb 15, 2022
Grant Date -
Dec 16, 2021
app pub date -
Apr 26, 2021
filing date -
Jun 16, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A decoding circuit and a decoding method based on the Viterbi algorithm are provided. The decoding method includes the following steps: decoding an encoded data based on the Viterbi algorithm to generate a decoded data; performing error correction on the decoded data to obtain a data content of the encoded data; comparing the decoded data and the data content to generate bit correction information; using the encoded data to calculate multiple first branch metrics based on the Viterbi algorithm, the first branch metrics corresponding to a target bit of the data content; adjusting at least one of the first branch metrics based on the data content and the bit correction information to generate multiple second branch metrics; and selecting the first branch metrics or the second branch metrics based on the bit correction information.
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