Transmission system utilizing different coding principles

Details Transmission system utilizing different coding principles Transmission system utilizing different coding principles

1997-11-03

1999-11-09

Pham, Chi H.

Pulse or digital communications

Pulse code modulation

Differential

341 76, 381106, H04B 1406

Patent

active

059828170

ABSTRACT:
In a transmission system for transmitting speech and music signals, an input signal is coded in a coder (11) by a time domain coder (4). The output signal of the time domain coder (4) is decoded by a time domain decoder (8) and the signal thus decoded is subtracted from the input signal by a subtracter circuit (10). To improve the coding quality, the difference signal is coded by a frequency domain coder (12) and the output signal of the time domain coder (4) and the frequency domain coder (12) are combined in a multiplexer (14) and transmitted to a receiver.

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Sinha et al., "Low Bit Rate Transparent Audio Compression using Adapted Wavelets", IEEE Trans on signal Processing vol. 41, No. 12, Dec. 1993.
Sinha et al., "Low Bit Rate Transparent Audio Compression Using Adapted Wave-lets", IEEE Transactions on Signal Processing, vol. 41, No. 12, Dec. 1993, pp. 3463-3479.
International Standard ISO/IEC DIS 11172 "Information technology--Coding of moving pictures and associated audio for digital storage media up to about 1.5 Mbit/s", section 3, pp. 174-337.

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