Patent ID: 7417687

Claim:
An apparatus including video synchronization signal removal circuitry, comprising: a reference electrode to convey a reference signal corresponding to a black video level; one or more output electrodes to convey one or more output signals; one or more video signal electrodes to convey one or more video signals, at least one of which includes a synchronization signal component having, between at least leading and trailing signal transitions, one or more signal values substantially unequal to said black video level; control circuitry coupled to at least one of said one or more video signal electrodes and responsive to said synchronization signal component by providing a control signal having assertion and de-assertion states, wherein said control signal is provided in said assertion state in response to an earlier portion of said synchronization signal component leading signal transition transcending a first threshold, following which said control signal remains in said assertion state for a predetermined time interval in response to a later portion of said leading synchronization signal component signal transition transcending a second threshold beyond said first threshold, wherein said predetermined time interval is initiated by said later portion of said leading synchronization signal component signal transition transcending said second threshold and is terminated following a last one of said synchronization signal component leading and trailing signal transitions, and is provided in said de-assertion state in response to said later portion of said leading synchronization signal component signal transition failing to transcend said second threshold; and signal routing circuitry coupled to said reference electrode, said one or more output electrodes, said one or more video signal electrodes and said control circuitry, and responsive to said control signal by conveying, as said one or more output signals, said reference signal substantially during said control signal assertion state and conveying said one or more video signals otherwise.