H - Electricity – 03 – M
Patent
H - Electricity
03
M
354/47
H03M 13/00 (2006.01) H04B 1/66 (2006.01) H04B 14/04 (2006.01) G10L 19/00 (2006.01)
Patent
CA 1207906
ABSTRACT In a speech-adaptive predictive coding system having an encoding unit and a decoding unit the encoding unit carries out the following operations. It divides a speech signal into frames of a fixed time length each; quantizes and encodes for each frame the parameter information of the predictor co- efficients and of the predictor residual power and the predicted residual sequence; converts the encoded parameter information into a parameter sequence of reflected binary codes; and multiplexes and transmits to said decoding unit said parameter sequence and the predicted residual sequence. The decoding unit carries out the following operations. It detects burst errors in the parameter sequence separated from the transmitted sequence; delays the para- meter sequence frame by frame; selects either the parameter sequence of the current frame or that of the delayed preceding frame in accordance with the detected results; converts the selected parameter sequence of reflected binary codes into the parameter information of the predictor coefficients and of the predictor residual power; and decodes the transmitted predicted residual sequence in response to the converted parameter information to provide a speech signal.
447849
Corporation Nec
Smart & Biggar
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