Abstract: A receiver having a first clock signal is provided. The first frequency of the first clock signal is adjusted to be close to a second frequency of a second clock signal of a transmitter. The receiver includes a clock generator, a processor and a controller. The clock generator is for generating the first clock signal. The processor is for outputting a first control signal to control the clock generator to adjust the first frequency to be close to the second frequency when an absolute value of a current difference between the first and the second frequencies at a current time point is larger than a threshold. The controller is for outputting a second control signal to control the clock generator when the absolute value of the current difference is smaller than the threshold, so as to reduce the load of the processor.

Abstract: A playback system that utilizes a serial link for transmitting video and audio data from a host to a playback device includes a host and a playback device. The host is utilized to generating graphic packets, video packets, and audio packets according to input data, and to generating control packets according to a host clock. Then, the host transmits the packets through a serial port, wherein the graphic packets are transmitted only when the host receives a request. The playback device is coupled to the host via the serial port, and is implemented to decoding the received packets from the serial port to generate decoded data, and to generate a playback clock according to the control packets. Then the playback device performs a playback operation according to the decoded data and the playback clock.

Abstract: A receiver having a first clock signal is provided. The first frequency of the first clock signal is adjusted to be close to a second frequency of a second clock signal of a transmitter. The receiver includes a clock generator, a processor and a controller. The clock generator is for generating the first clock signal. The processor is for outputting a first control signal to control the clock generator to adjust the first frequency to be close to the second frequency when an absolute value of a current difference between the first and the second frequencies at a current time point is larger than a threshold. The controller is for outputting a second control signal to control the clock generator when the absolute value of the current difference is smaller than the threshold, so as to reduce the load of the processor.