Picture compression process

Picture compression process

The invention relates to a picture compression process in which each picture macroblock is subjected to the coding chosen, for each macroblock, from among several coding types. To select the coding type to be applied to the macroblock, the cost (Ci) or a quality factor (MB_Quality) is determined, by...

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Hauptverfasser: Thoreau, Dominique, Ruellou, Pierre
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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creator Thoreau, Dominique
Ruellou, Pierre
description The invention relates to a picture compression process in which each picture macroblock is subjected to the coding chosen, for each macroblock, from among several coding types. To select the coding type to be applied to the macroblock, the cost (Ci) or a quality factor (MB_Quality) is determined, by trial codings, for each coding type i. The coding selection is made as a function of the values of the cost or of the quality factor or of the pairs of values of these parameters. Application to MPEG coding, especially MPEG2 coding, so as to deliver pictures of constant quality and/or good quality/cost ratio.
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To select the coding type to be applied to the macroblock, the cost (Ci) or a quality factor (MB_Quality) is determined, by trial codings, for each coding type i. The coding selection is made as a function of the values of the cost or of the quality factor or of the pairs of values of these parameters. 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subjects CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
title Picture compression process
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