Image decoder using adjustable filtering

Details Image decoder using adjustable filtering Image decoder using adjustable filtering

1996-02-05

1998-05-05

Swann, Tod R.

Image analysis

Image compression or coding

Quantization

364DIG1, 348420, 348404, G06F 900

Patent

active

057487952

ABSTRACT:
Noise contained in a reproducing image signal is suppressed by performing a filtering operation on an image signal obtained by decoding data that has been coded with a unit of a block consisting of m.times.n pixels. A filter circuit having a plurality of filter characteristics suppresses noise, and a characteristics selection circuit switches the filter characteristics of the filter circuit by use of a quantizing parameter employed for coding the image signal.

REFERENCES:
patent: 4722002 (1988-01-01), Mochizuki et al.
patent: 4951139 (1990-08-01), Hamilton et al.
patent: 5097331 (1992-03-01), Chen et al.
patent: 5253075 (1993-10-01), Susiyama
patent: 5422736 (1995-06-01), Katayama
patent: 5452104 (1995-09-01), Lee
patent: 5499057 (1996-03-01), Kondo et al.
patent: 5563662 (1996-10-01), Kishi

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