TRANSMISSION LINE ENCODING METHOD, DECODING METHOD, AND APPARATUS

Japanese Patent JP3922979

B2

PROBLEM TO BE SOLVED: To provide a transmission line encoding method, a decoding method, and an apparatus capable of realizing a low delay and suppressing the degradation of a decoded sound signal without additional redundant bits.
SOLUTION: An audio encoder 100 converts an input sound signal into a plurality of compressed frame data in an sound signal compression coder 101, determines the importance of each bit in a classification unit 104 of a transmission line coder 102 based on the decoding quality in the presence of a transmission error, and classifies the bits into a plurality of classes. The audio encoder selects one of the three types of processing including convolution coding and addition of CRC check codes, convolution coding only, and no coding, in descending order of importance for each class in a CRC code attaching unit 103 and a convolution coder 104. Then, the audio encoder adds preamble information and a synchronization signal in a multiplexer 105 to generate a bit stream.

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Yutaka Bamba

JP2002201676A

May 30, 2007

July 10, 2002

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Matsushita Electric Industrial Co., Ltd

G10L19/00; H04B14/06; G10L19/005; G10L19/02; H03M7/38; H03M13/23; H03M13/35; H04L1/00; (IPC1-7): H04B14/06; G10L19/00; G10L19/02; H03M7/38; H03M13/23; H03M13/35; H04L1/00

JP10022937A
JP9083982A
JP7015353A
JP118610A
JP3504787A
JP7336313A
JP7336312A
JP677911A

Shohei Oguri
Hironori Honda
Toshimitsu Ichikawa
Takeshi Takamatsu

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