Patent ID: 7619950
Filing Date: 2009-11-17
Classification: G11B

Abstract:
1. A recording medium including recorded data, comprising: an information area, the information area including a first region for the recorded data and a second region for information which controls recording or reproduction of the recorded data, said second region including a data unit, the data unit including a first portion having first data encoded in straight type and a second portion having said information encoded in wobbled type by bi-phase modulation wherein the recorded data is recorded as straight pits formed along tracks, the first portion includes a frame sync signal indicative of the start of a data frame and is encoded in straight pits, and the second portion is positioned after the first portion having the frame sync signal and is encoded in straight pits and wobbled pits shifted from a track center to the left and/or right; and wherein said information is recorded in a lead-in zone of the information area of the recording medium.