Patent ID: 6441860
Filing Date: 2002-08-27
Classification: H04N

Abstract:
A video signal processing apparatus for use with a display apparatus and an input video signal having one of a plurality of signal formats comprising:means for generating and separating a synchronizing signal from said input video signal; a clock signal generator for generating a clock signal phase-locked to a phase of said input video signal; means for detecting which format of said plurality of signal formats corresponds to said input video signal; an output system clock signal generator for generating i) a synchronizing pulse to display the decoded input video signal on the display apparatus and ii) an output system clock signal which is phase-locked with said synchronizing pulse; a memory which stores a plurality of programs for processing the video signal by a signal processor; control means for selecting a program for decoding the input video signal stored in said memory based on the detected format of the input video signal; and a first signal processor for decoding said input video signal using said selected program and producing an output video signal; storage means for storing the output video signal of said first programmable signal processor; and a second signal processor for processing an output signal from said storage means using said selected program, wherein the second signal processor uses a frequency twice the frequency of the synchronizing signal of the input video signal.