Perceptual noise masking measure based on synthesis filter frequ

Details Perceptual noise masking measure based on synthesis filter frequ Perceptual noise masking measure based on synthesis filter frequ

1995-09-19

1998-08-04

MacDonald, Allen R.

395 238, 395 235, G10L 302

Patent

active

057907595

ABSTRACT:
A speech compression system called "Transform Predictive Coding", or TPC, provides for encoding 7 kHz wideband speech (16 kHz sampling) at a target bit-rate range of 16 to 32 kb/s (1 to 2 bits/sample). The system uses short-term and long-term prediction to remove the redundancy in speech. A prediction residual is transformed and coded in the frequency domain to take advantage of knowledge in human auditory perception. The TPC coder uses only open-loop quantization and therefore has a fairly low complexety.

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IEEE Transaction on Communications, Cuperman et al., "Low delay vector excitation coding od speech at 16 kb/s", vol. 40, Iss 1, pp. 129-139, Jan. 1992.

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