Method and apparatus for recovering data, such as teletext...

Details Method and apparatus for recovering data, such as teletext... Method and apparatus for recovering data, such as teletext...

H - Electricity

04

L

H04L 1/00 (2006.01) H04L 7/02 (2006.01) H04L 7/033 (2006.01) H04L 7/04 (2006.01)

Patent

CA 2066637

A receiver for recovering serial digital data, such as teletext, achieves an effective sampling rate which is a multiple of the local receiver clock frequency by passing the data signal through a multitap delay line. The delay line outputs are supplied to a register, and the register output which yields the lowest bit error rate is determined and used as the data sampling point. The opti- mum sampling point is determined by first ascertaining a nominal sampling point from the signal preamble and then program- matically incrementing through the available sampling points (register outputs) until there is no improvement in bit error rate

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