Method for detecting digital video interface off-line mode and associated receiver

摘要

A TMDS receiver includes a plurality of data channels, a clock channel, and an off-line mode detector. Each data channel receives a video signal and the clock channel receives a clock signal. Each data channel comprises a channel decoder for decoding the signals received by the corresponding receiving channel. The off-line mode detector detects an off-line mode detector, and then turns on a plurality of first data channels for a first predetermined period to determine an operation mode of video signal transmitted on said first data channels if the activity of the clock signal is valid. The off-line mode detector also activates a plurality of second data channels among the plurality of data channels according to the operation mode if the operation mode is determined as valid.