Recursive metric for NTSC interference rejection in the ATSC-HDTV trellis decoder
US6744474B2 · kind B2 · utility
98Cited by
3References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 19, 2001 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Jan 15, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N11/24
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a system for receiving a signal containing digital data representing HDTV image information in the form of multilevel symbols formatted into groups of successive fields, each field comprising a field segment, a plurality of data segments, and associated sync components, the received signal is demodulated to produce a demodulated signal. The demodulated signal is comb-filtered to reject NTSC co-channel interference to produce a filtered signal. The filtered signal is trellis decoded with a trellis decoder employing a recursive non-Euclidean metric.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.