Bit allocation generator for adaptive transform coder

Details Bit allocation generator for adaptive transform coder Bit allocation generator for adaptive transform coder

1982-06-30

1985-05-07

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

G10L 100

Patent

active

045162581

ABSTRACT:
Adaptive bit allocation to a set of spectral transform coefficients is optimized by setting a predetermined first (maximum) threshold, then allocating one bit to those coefficients above the threshold, no bits to those below. If the total number of bits has not been allocated, the threshold is lowered an "integer" step to a second threshold, and again one bit allocated to those coefficients above the second threshold. The procedure is iterated until all the total bits are allocated or, if too many bits are allocated after the last integer step, a "fractional" step threshold is used.

REFERENCES:
patent: 4184049 (1980-01-01), Crochiere et al.
patent: 4216354 (1980-08-01), Esteban et al.
"Frequency Domain Coding of Speech" by Jose M. Tribolet and Ronald E. Crochiere, IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-27, No. 5, pp. 512-530, Oct. 1979.

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