Patent ID: 8041845
Filing Date: 2011-10-18
Classification: G06F,Y02D

Abstract:
1. A method of detecting an off-line mode for a digital video interface including an active clock channel and a plurality of data channels, said method comprising: detecting an activity of a clock signal on said clock channel by detecting a frequency of the clock signal; determining whether the activity of the clock signal is valid based upon whether the frequency of the clock signal is operated within a desired frequency range; turning on a first data channel of said plurality of data channels for a first predetermined period to determine an operation mode of a video signal transmitted on said first data channel if the activity of the clock signal is valid; powering down all data channels for a second predetermined period if the operation mode of the video signal transmitted on said first data channel is determined to be invalid by referencing a look-up table; and activating a plurality of second data channels among said data channels according to the operation mode if the operation mode of the video signal transmitted on said first data channel is determined to be valid by referencing the look-up table.