Patent ID: 7774509

Claim:
A command conversion device, comprising: a connector to be connected to an amplifier device which sends/receives a plurality of different types of first commands and performs an operation in relation to a first command and which is connectable to a plurality of types of reproduction devices respectively corresponding to the plurality of different types of first commands, wherein the device type corresponds to a reproduction type, and the connector also to be connected to a content reproduction device which sends/receives a second command and performs an operation in relation to the second command; a selector for selecting which type of reproduction device different from a type of the content reproduction device the amplifier assumes the content reproduction device is from among the plurality of types of reproduction devices respectively corresponding to the plurality of different types of first commands; and a converter for, when first commands to control the reproduction device selected by the selector are received from the amplifier device, converting the received first commands into second commands and sending the second commands to the content reproduction device, wherein, with respect to each of the plurality of types of first commands, when the commands to control the reproduction device whose type is selected by the selector are input to the amplifier device by a user operation, the amplifier device sends the first commands whose type is selected by the selector to the command conversion device, and the converter sends the second commands of the type of the content reproduction device to the content reproduction device, so that the content reproduction device performs the operation.