Method for identifying format of a received video signal

Details Method for identifying format of a received video signal Method for identifying format of a received video signal

2006-10-10

2006-10-10

Hsia, Sherrie (Department: 2622)

Television

Basic receiver with additional function

Multimode

C348S554000

Reexamination Certificate

active

07119847

ABSTRACT:
A method for identifying format of a video signal including a raster-synchronizing signal having a timing signal spanning a synch interval and a synch-follower signal level adjacent the synch interval, and a color-related signal, includes the steps: (a) ascertaining (1) first signal level of the color-related signal during the synch interval; (2) synch difference between level of the raster-synchronizing signal during the synch interval and the synch-follower level; and (3) peak excursion for the color-related signal; (b) in any order: (1) if first signal level is greater than a first value, set a first factor at one, else zero; (2) if synch difference is greater than a second value, set a second factor at one, else zero; and (3) if peak excursion is greater than a third value, set a third factor at zero, else one; and (c) employing the factors to identify the format according to predetermined relationships.

REFERENCES:
patent: 5990971 (1999-11-01), Nakai et al.
patent: 6441860 (2002-08-01), Yamaguchi et al.

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