Robust system for transmitting and receiving map data
US6924753B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2003 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | Mar 27, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99943
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.