Patent ID: 6671115
Filing Date: 2003-12-30
Classification: G11B

Abstract:
A method of detecting a servo mark among a digital data signal read from or generated on the basis of a recorded medium with a read head, the method comprising:filtering the digital data signal; analyzing the filtered digital data signal to detect a first predetermined sequence of bits, the detection of the first predetermined sequence of bits indicating detection of a first burst; incrementing a first error count value for each bit of analyzed data after detecting the first burst; monitoring the first error count value and, in response to the first error count value reaching a first predetermined error count value, clearing detection of the first burst; analyzing the filtered digital data signal to detect a second predetermined sequence of bits, the detection of the second predetermined sequence of bits indicating detection of a second burst; incrementing a second error count value for each bit of analyzed data after detecting the second burst; and monitoring the second error count value and, in response to the second error count value reaching a second predetermined error count value, setting a servo mark detection signal.