H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 11/14 (2006.01) H04N 5/04 (2006.01) H04N 5/38 (2006.01) H04N 7/22 (2006.01) H04N 7/24 (2006.01) H04N 9/44 (2006.01) H04H 1/00 (2006.01)
Patent
CA 2261945
A technique for delivering analog video over fiber-to-the-home (FTTH) networks addresses a fundamental problem of the standard signal format, i.e., power budget constraint, by increasing the useable optical signal efficiency. In particular, a technique is provided for transmitting an efficient modified analog video which is compatible with existing receivers. More specifically, the synchronization portion of a standard NTSC video signal (92) is reduced in amplitude (98) during transmission, producing an appreciable increase in the allowable optical modulation index (OMI).
L'invention concerne une technique de transmission de signaux vidéo analogiques sur des réseaux à fibres optiques desservant les foyers (FTTH), permettant de résoudre le problème fondamental de la structure du signal, c'est-à-dire de la contrainte de budget de puissance, par l'augmentation de l'efficacité du signal optique utilisable. Elle porte notamment sur une technique permettant de transmettre un signal vidéo analogique modifié efficace, compatible avec des récepteurs existants. Encore plus spécifiquement, la partie de synchronisation d'un signal vidéo standard NTSC (92) est réduite en amplitude (98) pendant la transmission, ce qui permet une augmentation appréciable de l'indice de modulation optique toléré (OMI).
Bell Communications Research Inc.
Kirby Eades Gale Baker
Telcordia Technologies Inc.
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