Patent ID: 8300148

Claim:
A video processing device, comprising: a processor comprising a general purpose input output (GPIO) pin, wherein the processor is operable to process different video signals, and to output different mode controlling signals via the GPIO pin according to different video signal formats; a voltage conversion circuit connected to the GPIO pin to receive the mode controlling signals, and generate and output different voltage signals according to the different mode controlling signals, wherein the different voltage signals respectively correspond to the different video signal formats; and a Syndicat des Constructeurs d'Appareils Radiorécepteurs et Téléviseurs (SCART) chip connected to the voltage conversion circuit and the processor, to receive the different video signals from the processor and the different voltage signals from the voltage conversion circuit, and process the different video signals according to the corresponding voltage signals; wherein the voltage conversion circuit comprises: a first transistor, an emitter of the first transistor being grounded, a base of the first transistor being connected to the GPIO pin through a first current limiting resistor, and a collector of the first transistor being connected to a reference voltage through a second current limiting resistor; and a second transistor, a base of the second transistor being connected to the collector of the first transistor, a collector of the second transistor being connected to the reference voltage, and an emitter of the second transistor being connected to the SCART chip to output the different voltage signals to the SCART chip.