Viterbi decoding apparatus and methods
AssigneeSony Corporation
InventorsNaohiko Iwakiri, Katsuya Yamamoto
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Abstract
A received data decoding apparatus receives and decodes transmitted convolutional code data. The received data is formed of a first channel whose data rate is fixed and a second channel whose data rate is variable. The received data decoding apparatus includes a most likelihood decoder for decoding the received data on the basis of a Viterbi algorithm and a data rate decision unit for obtaining a predetermined data rate of the second channel determined according to a path metric amount which is a decoded output from the most likelihood decoder.
Claims24
A received data decoding apparatus for receiving and decoding transmitted convolutional code data, said received data being formed of a first channel whose data rate is fixed and a second channel whose data rate is variable, comprising:
- most likelihood decoding means for decoding said received data on the basis of a Viterbi algorithm;
- and
- data rate deciding means for obtaining a predetermined data rate of said second channel determined according to a path metric amount which is a decoded output from said most likelihood decoding means.
A received data decoding apparatus for receiving and decoding transmitted convolutional code data, said received data being formed of a first channel whose data rate is fixed and a second channel whose data rate is variable, comprising:
- most likelihood decoding means for decoding said received data on the basis of a Viterbi algorithm;
- symbol error rate calculating means for calculating a symbol error rate of said received data by using an output from said most likelihood decoding means;
- and
- data rate deciding means for obtaining a predetermined data rate of said second channel determined according to a path metric amount which is a decoded output from said most likelihood decoding means.
A method for receiving and decoding transmitted convolutional code data, said received data being formed of a first channel whose data rate is fixed and a second channel whose data rate is variable, comprising the steps of:
- decoding said received data on the basis of a Viterbi algorithm;
- and
- obtaining a predetermined data rate of said second channel determined according to a path metric amount generated by the Viterbi algorithm.
A method for receiving and decoding transmitted convolutional code data, said received data being formed of a first channel whose data rate is fixed and a second channel whose data rate is variable, comprising the steps of:
- decoding said received data on the basis of a Viterbi algorithm;
- calculating a symbol error rate of said received data by using an output generated by the Viterbi algorithm;
- and
- obtaining a predetermined data rate of said second channel determined according to a path metric amount generated by the Viterbi algorithm.
Dependencies are inferred from the claim text.