Robust system for transmitting and receiving map data
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United States of America Patent
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Mar 1, 2005
Grant Date -
Aug 19, 2004
app pub date -
Jan 16, 2004
filing date -
Feb 18, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
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.
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