Lossless variable-bit signature compression

H - Electricity – 03 – M

Patent

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Details

H03M 7/30 (2006.01) G06T 9/00 (2006.01)

Patent

CA 2463824

Apparatus and methods for compressing data points. The invention compresses the representation of a sequence of points in a space by, for example, dividing the sequence of points into segments of successive points and then compressing each of the segments irrespective of the compression applied to the other segments. The dividing may include dividing the points sequence into segments of S successive points. The value of S may be the value of S generating the smallest of the multiple compressions. The compression may include compressing each of the segments of S successive, i-bit points into segments of j-bit points, where j <= i, j may vary from segment to segment and, for any given segment, j is the minimum number of bits necessary to represent the data in that given segment.

L'invention concerne un appareil et un procédé pour la compression de points de données. Selon l'invention la représentation d'une séquence de points dans un espace est compressée, par exemple, par division de la séquence de points en segments de points successifs puis par compression de chacun desdits segments quelle que soit la compression appliquée aux autres segments. La division peut comporter la division de la séquence de points en segments de S points successifs. La valeur de S peut être la valeur de S produisant la plus petite des compressions multiples. Ladite compression peut comprendre la compression de chaque segment de S points à i-bits successifs, en segments de points à j-bits, j étant inférieur ou égal à i, j pouvant varier d'un segment à l'autre ; et pour chaque segment donné, j représente le nombre minimum de bits nécessaires pour représenter les données dans ledit segment donné.

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