Patent ID: 7079755

Claim:
An apparatus for reproducing a DVD-Audio disk having an audio manager (AMG) having information on an audio title (ATS) and the ATS has audio title set information (ATSI) followed by audio objects (AOBs), the ATSI includes audio stream attributes, each audio stream attribute indicating an audio coding mode, a first, second, and third quantization bit number corresponding to the data to be reproduced, indicating and differentiating between first, second, third, fourth, fifth, and sixth sampling frequencies corresponding to the data to be reproduced, and decoding algorithm information relating to a number of audio channels of the data to be reproduced, and each of the AOBs includes a plurality of audio packs recorded with audio data corresponding to the decoding algorithm stored in the audio stream attribute, the apparatus comprising: an optical pickup to pickup an optical signal from the DVD-Audio disk; a controller to generate, using information data extracted from the optical signal, an audio control signal including the audio coding mode, the sampling frequency of the six potential sampling frequencies, the number of audio channels, and the detected one of the first through third quantization bit numbers; and an audio decoder to decode the audio data, to multi-channel mix, to sampling-frequency convert, to requantize the decoded audio signal according to the audio control signal, and to generate an output decoded audio data.