Patent ID: 8154822
Filing Date: 2012-04-10
Classification: G11B

Abstract:
1. A method comprising: obtaining a digital signal representing a repeatable runout (RRO) signal included in an analog signal of a computer-readable storage medium, the RRO signal including a preamble that represents a magnitude of the RRO signal, and data, the digital signal including a digital representation of the preamble; determining, by processing circuitry, an estimate of the magnitude of the RRO signal based on the digital representation of the preamble; comparing, by the processing circuitry, the estimate of the magnitude of the RRO signal and a specified level to generate an error signal based on a difference between the estimate and the specified level; and delaying provision of the generated error signal for application to a subsequent RRO signal of the computer-readable storage medium, wherein the RRO signal is amplified prior to being represented as the digital signal to match a value established to decode the RRO signal.