Pulse or digital communications – Repeaters – Testing
Patent
1980-12-22
1983-05-31
Kemeny, Emanuel S.
Pulse or digital communications
Repeaters
Testing
375 14, G10L 100
Patent
active
043862373
ABSTRACT:
A nearly instantaneous companding processor uses variable precision block quantization for reducing the digital transmission rate of speech signals while at the same time maintaining a high quality signal in a digital communication system. The variable number of bits which are used to encode each sample is controlled as a function of the maximum sample magnitude in a block of N samples. This technique takes advantage of the amplitude probability density function of a speech signal to thereby reduce the quantizing noise without increasing the transmission rate.
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Croll et al., "Nearly Instantaneous Digital Compander . . . ", Electronics Letters, Jul. 12, 1973, pp. 298-300.
Suyderhoud Henri G.
Virupaksha Krishnamoorthy
Intelsat
Kemeny Emanuel S.
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