Control integrated circuit for maintaining video output to conditional access module with aid of reference clock regeneration, associated television receiver and associated method

Abstract

A control integrated circuit (IC) for maintaining video output to a conditional access module (CAM) with aid of reference clock regeneration, an associated television receiver and an associated method are provided. The control IC may include an input control circuit, a frame processing circuit, a clock control circuit, and an output control circuit. The input control circuit receives a transport stream (TS) data signal from a demodulator circuit, the frame processing circuit performs frame processing operations on the TS data signal to prepare a plurality of frames, the clock control circuit generates a second reference clock signal according to the TS valid signal to be a replacement for a first reference clock signal, and the output control circuit outputs the plurality of frames to the CAM according to the second reference clock signal, to allow the CAM to perform conditional access (CA) control for the television receiver.