Patent ID: 8675131

Claim:
Signal processing device detachably and electrically connected to a TV, the TV comprising a video output unit and an audio output unit, and driven by the TV, the signal processing device exchanging a media signal with the TV, wherein: the signal processing device comprises an audio input interface for receiving an audio signal from an external audio input unit and a media storage unit for storing the media signal, and after being processed by the signal processing device, the audio signal and the media signal are transmitted to the video output unit and the audio output unit of the TV for output; the signal processing device further comprises a function extension module, which is electrically connected to the audio input interface to the audio signal inputted from the audio input interface; the function extension module is connected to the television system through a gold finger linker, and the gold finger linker comprises a power signal terminal, communication control signal terminal and an audio-video signal terminal.