Patent ID: 7450827

Claim:
A digital signal recording apparatus adaptable to be used at least by a decoding apparatus and/or a player, the signal recoding apparatus 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 quantization word length and a first sampling frequency, (2) quantizing a second original audio signal into a quantization-resultant audio signal at a second quantization word length and a second sampling frequency, and (3) subjecting the quantization-resultant audio signal to a bit shift, the first original audio signal being in a front channel (Lf, Rf) group having multiple channels, the second original audio signal being in a rear channel (Ls, Rs) group having multiple channels, the first sampling frequency being assigned to each of the channels in the first channel group, the second sampling frequency 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 quantization word length and first sampling frequency and the second quantization word length and second sampling frequency, data representing the quantity of the bit shift and channel assignment information for identifying the channels in the first channel group and the channels in the second channel group; wherein when used with the decoding apparatus, the decoding apparatus utilizes the data in the audio title set (ATS) to decode the digital audio signal to the original audio signals.