Patent ID: 7382700
Filing Date: 2008-06-03
Classification: G11B

Abstract:
1. An optical audio disc having an area storing an 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 ), (2) quantizing a second original audio signal into a quantization-resultant audio signal at a second sampling frequency (fs 2 ), and (3) subjecting the quantization-resultant audio signal to a bit shift, 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 bit shift having a quantity common to the channels in the second channel group; the audio title set (ATS) including data representing the first sampling frequency (fs the area also storing audio manager (AMG) containing data for controlling the digital audio signal and the data for displaying menu of the digital audio signal.