Patent ID: 8203655

Claim:
A multimedia television system comprising: a receiver for receiving an audio/video signal comprising an audio signal and a video signal and outputting the audio signal and the video signal respectively; a detector, when an external upgrading/transmitting device is connected to the detector, the detector generating an upgrading signal; an audio processing/controlling device coupled to the receiver and the detector, when the audio processing/controlling device receives the upgrading signal from the detector, the audio processing/controlling device receiving the audio signal from the receiver and processing the audio signal into a multi-channel audio signal according to the upgrading signal, wherein the multi-channel audio signal comprises M front sub-audio signals and N rear sub-audio signals, M and N are positive integers; and a mixing device coupled to the audio processing/controlling device and the detector, for receiving the N rear sub-audio signals from the audio processing/controlling device and processing the N rear sub-audio signals into at least one mixed audio signal; wherein after the detector receives the at least one mixed audio signal from the mixing device, the detector will transmit the at least one mixed audio signal via the external upgrading/transmitting device.