Apparatus and method for detecting sector sync signal on an optical storage medium

A method of detecting an LPP signal on an optical storage medium, comprising:

• detecting frame sync bits from the LPP signal on the optical storage medium;
• determining whether continuity exists in the detection of the frame sync bits;
• detecting a 3-bit sector sync using a 3-bit long window when continuity exists in the detection of the frame sync bits;
• detecting a 6-bit sector sync using a 6-bit long window when continuity does not exist in the detection of the frame sync bits;
• outputting a sync detection period when continuity exists in the detection of the frame sync bits and in the detection of the 3-bit sector sync or the 6-bit sector sync;
• and
• outputting a predetermined sync detection count value when a sector sync signal is detected when there is no continuity in the detection of the frame sync bits and in the detection of the 3-bit sector sync or the 6-bit sector sync.

An LPP signal detection circuit to detect an LPP sync signal on an optical storage medium, comprising:

• a wobble PLL unit outputting a wobble clock signal from a phase locked loop in response to an input wobble signal and a PLL wobble signal synchronized with the wobble clock signal;
• a wobble phase difference detection unit detecting a phase difference between a predetermined phase reference signal and the PLL wobble signal output from the wobble PLL unit;
• a wobble phase difference compensation unit compensating a phase of the PLL wobble signal by the phase difference detected by the wobble phase difference detection unit;
• a sector sync detection unit detecting sector sync signals from the LPP sync signal using the PLL wobble signal having the compensated phase, wherein the sector sync signals are selectively detected using a 6-bit detection window or a 3-bit detection window depending on whether a sync bit recorded in each frame making a sector is consecutively detected and is reflected;
• a LPP data conversion unit receiving a count value indicating the detection of the sector sync signals from the sector sync detection unit and converting three-bit long LPP signals into data values of “1” or “0”;
• and
• an LPP decoding unit arranging the data values received from the LPP data conversion unit and performing an error correction code ECC correction on the data.