Robust system for transmitting and receiving map data

H - Electricity – 03 – M

Patent

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Details

H03M 13/00 (2006.01) H03M 13/05 (2006.01) H03M 13/09 (2006.01) H03M 13/27 (2006.01) H04N 7/24 (2006.01)

Patent

CA 2514186

Frames comprise odd fields and even fields. The frame sync segments of the odd fields contains a current map specifying the location of data in frames, a next map specifying the location of data in a future frame, and a frame count designating the future frame. The frame sync segments of the even field may contain the same information. Alternatively, the frame sync segments of the odd fields contain the current map and part of the frame count, and the frame sync segments of the corresponding even fields contain the next map and the rest of the frame count. A receiver uses the map and frame count information to find data in the fields of received frames.

La présente invention a trait à un système comportant des trames comprenant de champs impairs et pairs. Les segments de synchronisation des trames de champs impairs contiennent une carte actuelle précisant la localisation de données dans des trames, une carte suivante précisant la localisation de données dans une trame ultérieure, et un compte par images désignant l'image ultérieure ultérieure. Les segments de synchronisation de trames des champs pairs peuvent contenir la même information. En variante, les segments de synchronisation de trames de champs impairs contiennent la carte actuelle et une partie du compte par images, et les segments de synchronisation de trames des champs pairs contiennent la carte suivante et le reste du compte par images. Un récepteur utilise la carte et l'information de compte par images pour retrouver des données dans les champs de trames reçues.

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