Patent ID: 7512048
Filing Date: 2009-03-31
Classification: G11B

Abstract:
1. A player for reading data from an optical disc having data disposed along a spiral, said disc including a lead-in area containing lead-in data including the characteristics of the disc, comprising: a controller generating a first command to rotate the optical disc in a first direction when the disc is first inserted into the player, wherein said disc has two data sides and is selected from a group consisting of: a motor receiving said first command and rotating the disc in said first direction; a first laser head positioned to read the data from the disc as the disc is rotated by the motor, wherein the disc has said lead-in area in one of two locations, in which said controller checks said two locations for said lead-in data; wherein said controller is adapted to detect said lead-in data, and if no lead-in data is detected after checking said two locations, the controller generates a second command for reversing the rotation of said disc; and categorizes the disc based on said characteristics as being said first or said second disc.