An optical disk for recording audio and video information in unit of field or sector has a recording format that provides an area for recording all audio information to be recorded in each unit immediately after an area used to set the power of the optical beam to a desired level. Also, an audio and...http://www.google.com/patents/US5375111?utm_source=gb-gplus-sharePatent US5375111 - Optical information recording medium, and audio and video information recording method
