Patent ID: 7826562
Filing Date: 2010-11-02
Classification: G09G,H04N

Abstract:
1. A digital interface receiver for receiving a digital signal containing a digital audio signal a video signal, a synchronization signal and a control signal transmitted from a source, comprising: a first reception unit that receives said digital signal transmitted from said source; a second reception unit that receives a clock signal that is transmitted from said source to demodulate said digital signal; a demodulation unit that demodulates said digital signal received by said first reception unit by using the clock signal received by said second reception unit; a detection device that detects an interface state between said digital interface receiver and said source; a mute circuit that mutes the demodulated digital audio signal which is extracted from said digital signal; and a controlling device that controls said mute circuit to be in a mute state or unmute state based on a detection result from said detection device, wherein said detection device includes a clock detection circuit that detects as said interface state whether the clock signal has been input or not from said source, and said controlling device places said mute circuit in a mute state when said clock detection circuit does not detect a clock signal input.