Patent ID: 8447003

Claim:
A communication system comprising a source device and a sink device connected to each other via a communication line, wherein the source device counts a clock CLKpixel for pixel data using a transmitting counter, adds a counted value Csource(t) of the transmitting counter at a timing of transmitting a video packet Pvideo to the sink device, to a header part of the video packet Pvideo as a time stamp value, and transmits the video packet Pvideo to the sink device, and wherein the sink device receives the video packet Pvideo, extracts the time stamp value Csource(t) from the header part of the video packet Pvideo, generates a fixed reference clock CLKref with a predetermined first frequency division parameter based on the counted value Csource(t) of the transmitting counter using a first PLL circuit, and generates the clock CLKpixel for the pixel data of the source device with a predetermined second frequency division parameter based on the reference clock CLKref using a second PLL circuit.