Lossless transform coding system for digital signals

Details Lossless transform coding system for digital signals Lossless transform coding system for digital signals

1997-12-29

1999-12-07

Ngo, Chuong Dinh

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

G06F 1714

Patent

active

059999578

ABSTRACT:
The invention provides a coding system and a decoding system wherein a discrete cosine transform which provides a high coding efficiency is approximated to allow reversible coding and decoding while maintaining the high coding efficiency and a system which includes such coding and decoding systems. Reversible coding is realized by multiplying a transform matrix by a fixed number for each row to approximate the transform matrix with integer values, performing re-quantization in a basic region defined by a multiple of a determinant for suppressing redundancy while maintaining a condition wherein reversible coding is possible in the basic region, and performing re-quantization for the entire region making use of the fact that such basic region appears periodically in a signal space.

REFERENCES:
patent: 4261043 (1981-04-01), Robinson et al.
patent: 4862263 (1989-08-01), Strobach et al.
patent: 5293434 (1994-03-01), Feig et al.
patent: 5408425 (1995-04-01), Hou
patent: 5590066 (1996-12-01), Ohki
patent: 5619270 (1997-04-01), Demmer
patent: 5621676 (1997-04-01), Iwata

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