Patent ID: 7750978
Filing Date: 2010-07-06
Classification: H04N

Abstract:
1. A method of processing an analog television signal comprising: converting said analog television signal to a digitized television signal having a frequency offset relative to baseband by an analog to digital converter; reducing said frequency offset to produce a near-baseband digitized television signal having a residual frequency offset; producing a signal representative of said residual frequency offset; based on said signal representative of said residual frequency offset, reducing said frequency offset to produce a nearer-to-baseband digitized television signal; and filtering said nearer-to-baseband digitized television signal to produce a first filter output signal having components restricted to a first frequency range, where said first frequency range is expected to contain an audio signal; and producing a control signal for a variable gain amplifier to maintain characteristics of said analog television signal at an intermediate frequency within a range acceptable to said analog to digital converter, wherein said control signal is based on a digital component video baseband signal.