Method and apparatus for modeling discrete data sequences by mul

Details Method and apparatus for modeling discrete data sequences by mul Method and apparatus for modeling discrete data sequences by mul

1996-12-31

1998-11-10

Young, Brian K.

Coded data generation or conversion

Digital code to digital code converters

Coding by table look-up techniques

348398, H03M 700

Patent

active

058350373

ABSTRACT:
A method for encoding and decoding digital signals, particularly audio signals, by using multiple reference vectors from a codebook and adaptively updating the codebook. The reference vectors from the codebook are combined, using a mathematical combination function, to achieve a synthesized vector that most closely matches the digital signal. The encoded signal consists of the mathematical combination function coefficients and the memory addresses of the reference vectors from the codebook used to achieve the synthesized vector. The encoded signal is decoded by separating the coefficients and the addresses and using a reverse combination procedure to reproduce the synthesized vector. Finally, the synthesized vector is stored in the codebook, by overwriting the oldest data, to adaptively update the codebook.

REFERENCES:
patent: 5371544 (1994-12-01), Jacquin et al.
patent: 5428396 (1995-06-01), Yagasaki et al.

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