Patent ID: 8582035
Filing Date: 2013-11-12
Classification: H04N

Abstract:
1. A method for digital television demodulation, comprising: using adjacent-channel power dependent automatic gain control (AGC) for said digital television demodulation, wherein an AGC technique takes into account a total power as well as power of adjacent channels to control gain of a gain control amplifier; wherein said power at an output of a channel filter is a wanted power level only and an ACI Power Ratio is given by wherein two values of said ACI_Power_Ratio are computed: ACI_Power_Ratio_Long_Term, wherein said ACI_Power_Ratio computed with Channel filter input and output powers are averaged over a long period; and ACI_Power_Ratio Short_Term, wherein said ACI_Power_Ratio computed with Channel filter input and output powers are averaged over a short period; wherein the short period is less than the long period; wherein the long period has a maximum time duration of 250 ms.