Method and apparatus for decoding bi-phase encoded data

Details Method and apparatus for decoding bi-phase encoded data Method and apparatus for decoding bi-phase encoded data

1994-01-04

1995-09-26

Hajec, Donald

Registers

Coded record sensors

Particular sensor structure

360 43, G06K 708

Patent

active

054536030

ABSTRACT:
A method and apparatus are provided for decoding bi-phase encoded data. The apparatus performs the steps of establishing a predicted bit cell length for a bit cell, detecting a leading clocking edge transition of the bit cell, detecting a first edge transition after the leading clocking edge transition, and calculating a first time interval from the leading clocking edge transition to the first detected edge transition. The apparatus also performs the steps of detecting a second edge transition after the leading clocking edge transition, calculating a second time interval from the leading clocking edge transition to the second detected edge transition, comparing both the first time interval and the second time interval to the predicted bit cell length, assigning a logical zero value to the bit cell if the first time interval is closer to the predicted bit cell length than the second time interval, and assigning a logical one value to the bit cell if the second time interval is closer to the predicted bit cell length than the first time interval.

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patent: 4357707 (1982-11-01), Delury
patent: 4626670 (1986-12-01), Miller
patent: 4912310 (1990-03-01), Uemura

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