Picture coding and decoding using multiplexing of...

Details Picture coding and decoding using multiplexing of... Picture coding and decoding using multiplexing of...

G - Physics

06

T

G06T 9/00 (2006.01) H03M 7/40 (2006.01) H03M 7/42 (2006.01) H04N 7/26 (2006.01) H04N 7/50 (2006.01) H04N 7/24 (2006.01)

Patent

CA 2426780

A frame coding unit (13) generates individual picture signal information from a moving picture signal Vin, and outputs a frame code value InfVal_F which is a numeric value to be obtained as a result of coding picture signal information of each frame. A variable length coding unit (16) decomposes the frame code value InfVal_F into unit frame code values Val_F which are basic units of coding, converts the unit frame code values Val_F, into frame code words Code_F using only a single code table (16a), and constructs a frame stream by combining the converted frame code words Code_F. A multiplexing unit (17) multiplexes a header stream which is constructed through a method equivalent to a conventional method and the frame stream, and constructs a picture coded signal Str.

Selon la présente invention, une unité de codage de trame (13) crée des informations de signaux image individuelles à partir d'un signal d'image animée Vin et produit une valeur de codage de trame InfVal_F qui est une valeur obtenue par le codage des informations des signaux image de chaque trame. Une unité de codage à longueur variable (16) dissout la valeur de codage de trame InfVal_F en une valeur de codage de trame d'unité Val_F qui constitue une unité de base du codage, convertit la valeur de codage de trame InfVal_F en un mot de codage de trame Code_F en utilisant un seul et unique tableau de codage (16a), et crée un flux de trames en combinant les mots de codage de trame Code_F convertis. Un multiplexeur (17) multiplexe un flux d'en-têtes préparé selon la procédure habituelle avec le flux de trames précité, constituant de la sorte un signal de codage d'image Str.

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