Patent ID: 6980500
Filing Date: 2005-12-27
Classification: G11B

Abstract:
1. An ATIP bit data generator, comprising: an analog processor for receiving a signal generated from an optical pickup, and further processing the signal to generate an ATIP FM signal; a high-frequency clock generator for generating a high-frequency clock; a first decoder for receiving the ATIP FM signal and the high-frequency clock, and generating a bi-phase data; a sync pattern detector for receiving the bi-phase data and the high-frequency clock, and generating a sync indication signal; and a second decoder for counting a pulse number of the high-frequency clock for each first counting cycle, the first counting cycle including a plurality of half periods of the ATIP FM signal, wherein: when the pulse number is smaller than a lower threshold value or greater than a upper threshold value, the second decoder outputs ATIP bit data with a first level; and when the pulse number is between the lower threshold value and the upper threshold value, the second decoder outputs ATIP bit data with a second level.