Method and apparatus for encoding and decoding images

Details Method and apparatus for encoding and decoding images Method and apparatus for encoding and decoding images

1997-03-14

2000-05-23

Kelley, Chris S.

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

348416, 358458, 382268, H04B 166

Patent

active

060673206

ABSTRACT:
An image signal expressing pel values and a significance signal, declaring for each pel whether the pel value is significant, are supplied as input signals. By referring to the input significance signal values for the pels proximal to the pel being processed, the significant pels are identified and a resolution conversion characteristics selector selects one of two or more frequency conversion characteristics to be used for resolution conversion of the image signal using only significant pels. A resolution converter then converts the resolution of the input image signal using the selected resolution conversion characteristic, and outputs the result as the image conversion apparatus output signal. Resolution conversion of the input image signal can therefore be accomplished by means of pel subsampling or interpolation without being affected by nonsignificant pels, and resolution conversion with minimal image quality loss caused by the conversion process is achieved.

REFERENCES:
patent: 4654484 (1987-03-01), Reiffel et al.
patent: 4672444 (1987-06-01), Bergen et al.
patent: 4816901 (1989-03-01), Music et al.
patent: 4870497 (1989-09-01), Chamzas et al.
patent: 4914508 (1990-04-01), Music et al.
patent: 5274471 (1993-12-01), Kim
patent: 5363213 (1994-11-01), Coward et al.
patent: 5387938 (1995-02-01), Fukuda et al.
patent: 5414527 (1995-05-01), Koshi et al.
patent: 5418626 (1995-05-01), Semasa
patent: 5424854 (1995-06-01), Hashimoto
patent: 5426513 (1995-06-01), Scorse et al.
patent: 5644406 (1997-07-01), Harrington et al.
patent: 5696845 (1997-12-01), Loce et al.
patent: 5760921 (1998-06-01), Miyake

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