Patent ID: 6185526
Filing Date: 2001-02-06
Classification: G10L

Abstract:
A speech transmission and reception system for digital communication, the system comprising:a speech encoding portion for transmitting an audio signal, the portion including:a speech encoder for compressing and encoding the audio signal to be transmitted, andan error correction encoder for performing a convolution encoding of the compression encoded audio signal; anda speech decoding portion for receiving the an audio signal, the portion including:a soft-decision error correction decoder for performing an error correction decoding of the received audio signal as a multivalue signal, and obtaining a soft-decision output including a probability information that represents a probability of each signal after being processed by the error correction decoding, anda soft-decision speech decoder for receiving the soft-decision output, and reproducing the most probable code sequence in accordance with the probability information and a state transition probability, so as to decode the audio signal.