Patent ID: 8072539

Claim:
A method for digital processing of an analog input video type signal having lines of video defined by horizontal sync pulses which may be carried with or separate from said input video type signal, some of said lines of video being active video carrying image content, said method comprising: a) responding to said input video type signal to provide a version thereof having an established DC level; b) generating a sampling clock; c) using an analog to digital converter responsive to said established DC level version of a) to provide a first group of a first number of digital samples for each line of active video thereof in response to said sampling clock; d) responding to a group of said digital samples of c), and providing a second group of a second number of digital samples; and e) responding to said second group of d), to provide a processed video type signal in the same analog form as said input video type signal, or to provide a processed video type signal in a different analog or digital form as said input video type signal, and wherein the processed video type signal is clocked with an output clock, wherein the output clock is responsive to either a reference video signal or said input video type signal, and wherein when the output clock is responsive to the reference video signal, said processed video type signal has a different frame rate than the frame rate of said input video type signal and the sampling clock and output clock have different frequencies.