Personalized low bit rate audio encoder and decoder using specia

Details Personalized low bit rate audio encoder and decoder using specia Personalized low bit rate audio encoder and decoder using specia

1994-12-21

1997-10-21

MacDonald, Allen R.

395 229, 395 267, 395 292, 84604, 84645, G01L 918

Patent

active

056805128

ABSTRACT:
Methods and systems for encoding an audio signal into a bit stream, and for recreating the audio signal from the bit stream are disclosed. In an embodiment of an encoder, a first encoder (10) symbolically encodes a substantially vocal audio signal to form a first encoded signal. A second encoder (12) symbolically encodes a substantially nonvocal audio signal to form a second encoded signal. A multiplexer (14) multiplexes the first encoded signal and the second encoded signal to form the bit stream. In an embodiment of a decoder, a demultiplexer (80) extracts an encoded vocal signal and an encoded nonvocal signal from the bit stream. A first decoder (82) forms a decoded vocal signal based upon the encoded vocal signal. A second decoder (84) forms a decoded nonvocal signal based upon the encoded nonvocal signal. A mixer (86) combines the decoded vocal signal with the decoded nonvocal signal to form the audio signal.

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05680359

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