Zhihao Hao Lin

US Patent:

6329981, Dec 11, 2001

Filed:

Nov 5, 1998

Appl. No.:

9/187296

Inventors:

Zhihao Lin - San Jose CA
Hsi-Sheng Chen - Fremont CA

Assignee:

NeoParadigm Labs, Inc. - Milpitas CA

International Classification:

G09G 500
H04N 1120
H04N 546

US Classification:

345204

Abstract:

An apparatus for detecting the video mode of a video data, the apparatus capable of receiving a plurality of synchronous signals along with the transmission of the video data, comprises: a first counter stage capable of receiving the synchronous signals and generating a first counter stage output signal that represents the number of total lines in a frame of the video data; a second counter stage capable of receiving an active line indicator signal that indicates an active line in the video data, the second counter stage capable of generating a second counter stage output signal that represents the number of active lines in a frame of the video data; and a logic circuit coupled to the first counter stage and to the second counter stage, the logic circuit capable of detecting the video mode of the video data based upon the values of the first counter stage output signal and the second counter stage output signal.