Patent ID: 7558326
Filing Date: 2009-07-07
Classification: G09G,H04L,H04N

Abstract:
1. A communication system, including: a transmitter; a receiver; and a TMDS-like communication link between the transmitter and the receiver, wherein “TMDS” denotes “transition minimized differential signaling,” the transmitter is configured to transmit video data over the link to the receiver, and the transmitter is configured to transmit auxiliary data to the receiver by modulating DC disparity of a channel of the communication link, wherein the transmitter is configured to transmit a stream of encoded data words over the channel, the words determine the video data and include bits indicative of accumulated DC disparity of the stream, and said bits determine the auxiliary data, and wherein the receiver is configured to determine a sequence of differences between successive values of the accumulated DC disparity, thereby determining the auxiliary data.