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

A method for maintaining video output to a conditional access module (CAM) with aid of reference clock regeneration, the method being applicable to a control integrated circuit (IC), and the control IC is installed in a television receiver, the method comprising:

• utilizing an input control circuit in the control IC to receive a first transport stream (TS) data signal of a first TS from a demodulator circuit in the television receiver, wherein the first TS data signal at least carries video data;
• utilizing a frame processing circuit in the control IC to perform frame processing operations on the first TS data signal according to a predetermined frame size to prepare a plurality of frames corresponding to the first TS data signal;
• utilizing a clock control circuit in the control IC to receive a first TS valid signal of the first TS from the demodulator circuit, and generate a second reference clock signal according to the first TS valid signal to be a replacement for a first reference clock signal generated by the demodulator circuit;
• and
• utilizing an output control circuit in the control IC to output 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, wherein the output control circuit outputs the second reference clock signal to the CAM, to make the CAM receive the plurality of frames according to the second reference clock signal rather than the first reference clock signal.