Encoder including an error decision circuit

U.S. Patent Number: 5274466

Abstract: An encoder comprises a memory for storing a to-be-coded original image, outputting a to-be-coded image signal in response to a to-be-coded region designation signal for designating a to-be-coded region used as a to-be-coded block, and outputting a to-be-transformed image signal in response to a to-be-transformed region designation signal for designating a to-be-transformed region; a transforming circuit for subjecting the to-be-transformed image signal to a predetermined transformation in response to a transformation method designation signal, and outputting a transformed image signal; a deciding circuit for deciding an error of the transformed image signal with reference to the to-be-coded image signal, and a control circuit for outputting, as a code, information on at least the to-be-transformed region and the transformation method which reduce the error decided by the deciding circuit to a predetermined value or below.

Inventors: Ida; Takashi (Ichikawa, JP), Dachiku; Kenshi (Tokyo, JP)

Assignee: Kabushiki Kaisha Toshiba (Kawasaki, JP)

Application Number: 07/816,651

Issued: 1993-12-28

Expired: 2005-12-28

Classes: 358/426.09 ; 375/240.18; 382/249

Field of search: 358/133,136,426,433 382/43,56

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