Title:
MULTI-MODE EQUALIZER IN DIGITAL VIDEO SIGNAL PROCESSING SYSTEM
Document Type and Number:
Japanese Patent JP3866375
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide the equalizer system for a digital high definition television receiver.
SOLUTION: The equalizer system is provided with an input adaptive feed forward filter(FFF) 20, a carrier recovery network 46, and a slicer 40 in addition to an adaptive decision feedback filter(DFF) 30 to eliminate inter-symbol interference. At the start of a blind equalization interval, the FFF is not in use and the DFF acts like a linear filter having an adaptive coefficient so as to equalize post ghost. For the blind interval period, the FFF coefficient is applied in a blind way to equalize preghost. In the succeeding decision direction mode thereafter, the slicer output is used to use nonlinearly both the FFF and the DFF.
Inventors:
Thuong-Chiang Shu
Kumar Ramas Wami
Paul Gossard Nasson
Kumar Ramas Wami
Paul Gossard Nasson
Application Number:
JP14667297A
Publication Date:
January 10, 2007
Filing Date:
June 04, 1997
Export Citation:
Assignee:
THOMSON CONSUMER ELECTRONICS,INCORPORATED
International Classes:
H04N5/21; H03H17/02; H03H21/00; H04B7/005; (IPC1-7): H04N5/21; H03H17/02; H03H21/00; H04B7/005
Domestic Patent References:
| JP5244040A | ||||
| JP795136A | ||||
| JP88795A | ||||
| JP8125585A | ||||
| JP8237179A | ||||
| JP8237520A |
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Kazuo Abe