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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
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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Beschreibung
Zusammenfassung:	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.