Signal encoding and signal decoding apparatus

Details Signal encoding and signal decoding apparatus Signal encoding and signal decoding apparatus

1993-01-26

1994-03-29

Chin, Stephen

Pulse or digital communications

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370109, 370118, 381 29, 381 31, 358433, H04B 166

Patent

active

052992403

ABSTRACT:
A system for encoding audio signals, transmitting or recording the encoded audio signals, and then decoding the transmitted audio signal includes a circuit for determining the block length of the input audio signals based upon detected values of predetermined portions of the input signal and then performing an orthogonal conversion of the determined block length signal, in which the signal is orthogonally transformed from a time-domain signal to a frequency-domain signal. Following quantization, the converted and encoded signal is transmitted and upon performing reverse quantization, a reverse orthogonal converting circuit converts the signal back to the time-domain in keeping with the signal providing information concerning the various block lengths that were determined during encoding. The converted time-domain signals are then connected into a smooth waveform to form output audio signals.

REFERENCES:
patent: 4897717 (1990-01-01), Hamilton et al.
patent: 5042069 (1991-08-01), Chhatwal et al.
patent: 5047852 (1991-09-01), Hanyu et al.
patent: 5187755 (1993-02-01), Aragaki

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