Optical discs formatted to record plural audio streams of different content for reproduction with a single video stream can result in audio output of content unexpected by the user depending upon the audio stream configuration contained in the AV stream reproduced. This can confuse and cause the user...http://www.google.com.tw/patents/US6377747?utm_source=gb-gplus-share專利 US6377747 - Optical disc, recording device and reproducing device
