Patent ID: 6900849

Claim:
An audio and/or video signal processing apparatus for supplying audio and/or video signals to a second apparatus, said audio and/or video signal processing apparatus comprising: first power supply input means for receiving electric power; power supply output means connectable to second power supply input means of the second apparatus; power supply connection means for connecting the power supply output means to the first power supply input means and via which at least a part of the power applied to the first power supply input means is applied to the power supply output means; supply voltage generating means coupled to the first power supply input means for generating at least one supply voltage; audio and/or video signal processing means for receiving said at least one supply voltage generated by the supply voltage generating means, said audio and/or video signal processing means processing at least one audio and/or video signal and supplying at least one processed audio and/or video signal to be transferred to the second apparatus; and signal output means for receiving the processed audio and/or video signal from the audio and/or video signal processing means, said signal output means being connectable to signal input means of the second apparatus, characterized in that said audio and/or video signal processing apparatus further comprises: detection means coupled to the power supply connection means for detecting an occurrence or non-occurrence of a supply of power to the power supply output means and, when the non-occurrence of a supply of power to the power supply output means is detected, for generating and supplying a first detection signal and, when the occurrence of a supply of power to the power supply output means is detected, for generating and supplying a second detection signal; and disconnection means coupled between the first power supply input means and the supply voltage generating means, said disconnection means disconnecting the supply voltage generating means from the first power supply input means in the case of an occurrence of the first detection signal, and connecting the supply voltage generating means to the first power supply input means in the case of an occurrence of the second detection signal, the supply voltage generating means then generating the at least one supply voltage and applying the at least one supply voltage to the signal processing means.