Abstract: A circuit includes an input channel array that includes a plurality of channels to receive a plurality of input signals and generate a plurality of channel output signals. A processor to processes the plurality of channel output signals from the input channel array. The processor and the input channel array are configured to operate in a sleep mode when all of the analog input signals are inactive or an active mode when at least one of the analog input signals is active. A secondary channel samples the plurality of input signals and generates a secondary output signal indicative of activity for at least one of the input signals. A secondary channel detector determines a level of signal activity for any of the input signals during the sleep mode based on the secondary output signal.

Abstract: A circuit includes an input channel array that includes a plurality of channels to receive a plurality of input signals and generate a plurality of channel output signals. A processor to processes the plurality of channel output signals from the input channel array. The processor and the input channel array are configured to operate in a sleep mode when all of the analog input signals are inactive or an active mode when at least one of the analog input signals is active. A secondary channel samples the plurality of input signals and generates a secondary output signal indicative of activity for at least one of the input signals. A secondary channel detector determines a level of signal activity for any of the input signals during the sleep mode based on the secondary output signal.

Abstract: A method for relieving binding between an Electronic Program Guide (EPG) and a multimedia node in an Internet Protocol Television (IPTV) system including: firstly sending an identity authentication request by a user, and then a user homepage authentication request after obtaining an identity authentication of a service processing module; and obtaining information of a multimedia node for serving the user via a node allocation module after receiving the user homepage authentication request, wherein the information of the multimedia node is used for assembling a channel Uniform Resource Locator for use by the user. The system relieves the binding relationship between an EPG and a multimedia node, enables the multimedia node to be dynamically allocated to the EPG when a user logs in, and enables the multimedia node to be used normally when a fault occurs in the EPG, thus improving the utilization rate of the system resource.