Patent ID: 6980501

Claim:
An optical audio disc having an area storing an audio audio title set (ATS), the audio title set (ATS) including data representing a digital audio signal resulting from steps including (1) quantizing a first original audio signal at a first sampling frequency (fs 1 ), and (2) quantizing a second original audio signal at a second sampling frequency (fs 2 ), the first original audio signal being in a first channel group having multiple channels, the second original audio signal being in a second channel group having multiple channels, the first sampling frequency (fs 1 ) being assigned to each of the channels in the first channel group, the second sampling frequency (fs 2 ) being assigned to each of the channels in the second channel group; the audio title set (ATS) including data representing the first sampling frequency (fs 1 ) and the second sampling frequency (fs 2 ), and channel assignment information for identifying the channels in the first channel group and the channels in the second channel group; and the area also storing an audio manager (AMG) containing data for controlling the digital audio signals and the data for displaying menu of the digital audio signals.