Method for correlation directed echo cancellation and channel equalization for the digital transmission link in vestigial side band amplitude modulation
US6687317B1 · kind B1 · utility
1Cited by
5References
4Claims
0Family size
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Key dates
| Filing date | Mar 8, 2000 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Mar 8, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4382
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for determining and reducing or eliminating mid-range and long-rang echoes in the digital data transmission (in ATSC VSB system) is described. A portion of an ATSC VSB television signal is separated from the rest of the signal, certain values are set to zero and it is correlated with a first vector of data. The result of the correlation represents a channel model as affected by echoes within the channel, and then a second vector of data is added to it to derive correction information useful in positioning moveable filter taps to suppress the most prominent echoes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.