Decoder for compressed digital signals

Details Decoder for compressed digital signals Decoder for compressed digital signals

1996-04-26

1997-12-30

Gaffin, Jeffrey A.

Coded data generation or conversion

Digital code to digital code converters

341 67, 348398, H03M 700

Patent

active

057035792

ABSTRACT:
In an encoder for decoding compression data obtained by conducting a compression encoding for digital data through subband division, logarithmic compression, and variable-bit-length quantization, an exponent of an exponent operation is separated into an integer part and a fraction part to obtain an operation formula such that an operation related to the fraction part is executed through a multiplication and an operation associated with the integer part is accomplished through a shift operation. In addition, using a correlation between results of the calculations, the number of calculation steps is reduced. Moreover, one type of information data is written in an area in which another type of information data is beforehand written so as to minimize the necessary memory capacity.

REFERENCES:
patent: 5511094 (1996-04-01), Lee et al.
patent: 5588029 (1996-12-01), Maturi et al.

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