Encoding apparatus of audio signal, audio disc and disc reproducing apparatus
View Patent ↗DVD-video data and DVD-audio data are recorded in a DVD-Avd disc. The DVD-audio data is composed of an audio manager having an audio manager information, an audio manager menu, a first audio title set including first audio data and a second audio title set including second audio data. The first audio data of the first audio title set is connected with audio contents included in the DVD-video data, and a real time information (RTI) pack or a still picture (SPCT) pack is included in the second audio title set. Therefore, the audio contents of the DVD-video data and the audio data of the DVD-audio data are managed by the audio manager information, and text information indicated by real time information or a still picture is displayed while reproducing the audio data. Also, DVD-video data recorded in a DVD-video disc, which is normally reproduced by using a reproducing apparatus dedicated to the DVD-video disc, can be reproduced by using a reproducing apparatus for the DVD-Avd disc.
1. An audio disc having a data structure comprising:
a video title set (VTS< 1 >) including video objects (VOBS) and audio data of the video objects;
a first managing area (VMG) including information (VMGI) for managing the video title set (VTS< 1 >);
a first audio title set (ATS< 1 >) including reference information for access to audio data of the video objects (VOBS) in the video title set (VTS< 1 >) and having a second audio title set (ATS< 2 >) including audio data (ACBS) including a multi-channel audio signal, where the audio data have a down-mix mode information for assigning whether or not inhibiting down-mix stereo output from the multi-channel audio signal; and
a second managing area (AMG) including information (AMGI) for managing the first and second audio title sets and managing the audio data of the video objects in the video title set.
2. An audio disc according to claim 1 in which the down-mix mode information for assigning whether or not inhibiting down-mix stereo output from the multi-channel audio signal is located in a header of audio pack.
3. An audio disc reproducing apparatus for reproducing data recorded in an audio disc, the audio disc having a data structure comprising:
a video title set (VTS< 1 >) including video objects (VOBS) and audio data of the video objects;
a first managing area (VMG) including information (VMGI) for managing the video title set (VTS< 1 >);
a first audio title set (ATS< 1 >) including reference information for access to audio data of the video objects (VOBS) in the video title set (VTS< 1 >) and having a second audio title set (ATS< 2 >) including audio data (ACBS) including a multi-channel audio signal, where the audio data have a down-mix mode information for assigning whether or not inhibiting down-mix stereo output from the multi-channel audio signal; and
a second managing area (AMG) including information (AMGI) kg managing the first and second audio title sets and managing the audio data of the video objects in the video title set;
wherein said audio disc reproducing apparatus comprises:
reproducing means for reproducing the audio data (ACBS) of the second audio title set existing in the second audio title set (ATS< 2 >) by using the information of the second managing area;
decoding means for decoding the down-mix mode information for assigning whether or not inhibiting down-mix stereo output from the multi-channel audio signal; and
down-mixing permitting means for permitting down-mixed stereo output from the multi-channel audio signal when said decoded down-mix mode information is not inhibiting down-mix stereo output from the multi-channel audio signal.
4. An audio disc reproducing apparatus according to claim 3 comprising:
decoding means for decoding the down-mix mode information for assigning whether or not inhibiting down-mix stereo output from the multi-channel audio signal, wherein the down-mix mode information is located in a header of audio pack of the audio disc.