Patent ID: 8274874

Claim:
An apparatus to locate a group of units of digital information in a removable optical disk, the apparatus comprising: a receiving tray configured to house a removable optical disk; a first laser configured to read information from a first locator video picture frame stored in a first optical recording layer of the removable optical disk at a particular region of the removable optical disk, the first locator video picture frame comprising a first I-Frame; a second laser configured to read units of digital information in a first group of units of digital information stored throughout a volume of a second optical recording layer of the removable optical disk at the particular region in which the first locator video picture frame is stored, the first group of units of digital information locatable by the first locator video picture frame and comprising a first group of video picture frames comprising a second I-Frame, the first I-Frame being a duplicate of the second I-Frame from the first group of video picture frames; a processing module coupled to the first laser and to the second laser that processes the information read by the first laser and by the second laser; and an optical disk reading sled that carries the first laser and the second laser and seeks in a radial direction across the removable optical disk at a varying radius with respect to the removable optical disk when housed in the receiving tray.