Idle suppression and signal threshold determination therefor

H - Electricity – 04 – L

Patent

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Details

H04L 5/16 (2006.01) H04B 1/66 (2006.01) H04L 5/14 (2006.01) H04N 1/00 (2006.01) H04N 1/333 (2006.01) H04N 1/41 (2006.01)

Patent

CA 2258837

A compression technique is used to suppress the idle or silent portion of both stations in a facsimile transmission. Facsimile transmission is a half-duplex protocol resulting in considerable idle time for either the called terminal or the calling terminal. The invention provides a signal level threshold for each station whereby signals above the threshold are allowed to pass through while signal levels below threshold are not, resulting in more efficient network bandwidth utilization.

L'invention concerne une technique de compression utilisée pour supprimer la partie inactive ou silencieuse de deux stations dans un système de transmission par télécopie. La transmission par télécopie est un protocole en mode semi-duplex entraînant des temps de silence considérables soit pour le terminal appelé, soit pour le terminal appelant. L'invention prévoit un seuil de niveau de signal pour chaque station, de sorte que les signaux supérieurs au seuil sont autorisés à passer, alors que les niveaux de signaux inférieurs au seuil ne le sont pas, ce qui permet d'utiliser avec plus d'efficacité la largeur de bande du réseau.

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