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EP0142439A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method of compressing a train of digital information, and apparatus therefor

Assignee: General Electric CGR SA
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Filing: 1984-11-09
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Granted: —
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Expires: 2004-11-09
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Abstract

Abstract Translated from French Compression d'informations numérisées pour charger une mémoire tampon en vue du transfert des informations vers une mémoire de masse. Compression of digitized information to load a buffer memory for the transfer of information to a mass memory. L'invention consiste notamment à transmettre la différence D n (20) entre deux pixels consécutifs X n-1 et X n au lieu de ces derniers, cette différence étant le plus souvent codable sur un faible nombre de bits et à supprimer le bit de signe (code C*) chaque fois que c'est possible, c'est-à-dire chaque fois que l'indétermination sur le signe est levée par la comparaison (22,23,25)entre D n et X n-1 . The invention notably consists in transmitting the difference D n (20) between two consecutive pixels X n-1 and X n instead of the latter, this difference being most often codable on a small number of bits and in deleting the bit of sign (code C *) whenever possible, that is to say each time the indeterminacy on the sign is lifted by the comparison (22,23,25) between D n and X n-1 . Application au stockage d'images. Application to image storage.

Inventors

  • 👤 Jean Lienard
  • 👤 Xavier Denoize
  • 👤 Diane Dessales-Martin

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-27 17:20
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/50; H04N19/593; H03; H03M; H03M7/00; H03M7/30; H03M7/40; H03M7/42

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