Device for encoding and decoding transmission signals through ad

Details Device for encoding and decoding transmission signals through ad Device for encoding and decoding transmission signals through ad

1994-10-12

1996-02-27

Williams, Howard L.

Coded data generation or conversion

Digital code to digital code converters

Adaptive coding

348404, H03M 700

Patent

active

054952441

ABSTRACT:
A device is provided for encoding and decoding transmitted signals through adaptive selection of different transform methods. An original signal or a predicted error signal having at least one dimension is input in parallel to a plurality of different transforms. The total energy level of coefficients, corresponding to low frequency components, from each transform is measured and compared. The output of the transform having the largest energy, is selected and encoded for transmission, and thereafter the transmission signal is decoded. The device maximizes encoding and decoding efficiencies.

REFERENCES:
patent: 3754128 (1973-08-01), Corinthios
patent: 4772947 (1988-09-01), Kono
patent: 4894713 (1990-01-01), Delogne et al.
patent: 4999705 (1991-03-01), Puri
patent: 5134396 (1992-07-01), Sirat et al.
patent: 5235623 (1993-08-01), Sugiyama et al.

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