Patent ID: 8447048

Claim:
A volume control system, comprising: an electronic device comprising: means for providing an audio signal; means for storing a first volume specification of the electronic device wherein the first volume specification comprises a first maximum value, a first minimum value and a plurality of first scale values, wherein a range from the first maximum value to the first minimum value are divided into the first scale values; and a volume controller; a peripheral device, comprising: means for storing a second volume specification of the peripheral device, wherein the second volume specification comprises a second maximum value, a second minimum value and a plurality of second scale values, wherein a range from the second maximum value to the second minimum value are divided into the second scale values; and at least one high definition multimedia interface for connecting the electronic device and the peripheral device, wherein the volume controller adjusts the audio signal according to a conversion ratio of the first volume specification to the second volume specification and transmits the adjusted audio signal to the peripheral device via the high definition multimedia interface, wherein the conversion ratio comprises a proportion of the first maximum value to the second maximum value, a proportion of the first minimum value to the second minimum value and a proportion of the first scale value to the second scale value.