Patent ID: 7394500

Claim:
A television signal reception system comprising: an analog to digital converter for: receiving an intermediate frequency television signal; and sampling said intermediate frequency television signal at a predetermined sampling frequency to produce a digitized television signal with a center frequency having an expected frequency offset from baseband, where said expected frequency offset is dependent upon a variant of a television standard according to which said intermediate frequency television signal is formatted; a controller for providing an indication of said variant of said television standard for said intermediate frequency television signal; a down converter including: a first down converter frequency source for: receiving said indication of said variant of said television standard from said controller; selecting a frequency for a first mixing signal based on said indication of said variant of said television standard, where said frequency for said first mixing signal incorporates said expected frequency offset; and a first down converter mixer for: receiving said digitized television signal; receiving said first mixing signal; mixing down said digitized television signal with said first mixing signal to produce a mixed-down, digitized television signal with a center frequency near baseband; and an image rejection filter for: receiving said mixed-down, digitized television signal; receiving said indication of said variant of said television standard; selecting filter coefficients based on said indication of said variant of said television standard; and filtering said mixed-down, digitized television signal according to said filter coefficients to produce a filtered digitized television signal; a second down converter frequency source for: receiving said indication of said variant of said television standard from said controller; selecting a frequency for a second mixing signal based on said indication of said variant of said television standard; and a second down converter mixer for: receiving said filtered digitized television signal; receiving said second mixing signal; mixing said filtered digitized television signal with said second mixing signal to produce a mixed-up, digitized television signal with a video carrier frequency near baseband.