Letter box line blackener for the HDTV/conventional-analog...

Details Letter box line blackener for the HDTV/conventional-analog... Letter box line blackener for the HDTV/conventional-analog...

2006-07-18

2006-07-18

Kostak, Victor R. (Department: 2622)

Television

Basic receiver with additional function

Multimode

C348S607000, C348S913000, C348S556000

Reexamination Certificate

active

07079192

ABSTRACT:
A blackener for letter box lines associated with a HDTV/conventional-analog hybrid television transmission where the blackener counts horizontal sync pulses contained in the HDTV/conventional-analog hybrid television transmission and determines when the HDTV/conventional-analog hybrid television transmission is in letter-box lines: if it is, then the blackener sends substitute black signal to an output; and if it is not, then the blackener sends the HDTV/conventional-analog hybrid television transmission to the output.

REFERENCES:
patent: 5274449 (1993-12-01), Keesen
patent: 5384599 (1995-01-01), Casavant et al.
patent: 5841479 (1998-11-01), Van Gestel et al.
patent: 5973749 (1999-10-01), Ishii et al.
patent: 6330037 (2001-12-01), Nakajima et al.
patent: 6621927 (2003-09-01), Mori et al.
patent: 6751256 (2004-06-01), Nickel

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