Patent ID: 7961829
Filing Date: 2011-06-14
Classification: H04L

Abstract:
1. A method of recovering a low jitter clock signal from a digital data stream transmitted over a baseband wireless network, comprising: defining a base clock signal for extracting the digital data stream from a data source device; modulating and encoding the digital data stream for transmission as a baseband data signal based on a transmission clock signal that is synchronized with said base clock signal; transmitting the modulated and encoded digital data stream as even clocked data pulses over the baseband wireless network using the transmission clock signal synchronized with said base clock signal; receiving said transmitted modulated and encoded digital data stream by a receiver; recovering a first clock signal and a recovered data signal from said received modulated and encoded digital data stream at the rate of and synchronized with said transmission clock signal, wherein said first clock signal suffers from a relatively high clock period variance known as jitter; dividing the frequency of said first clock signal to produce a second clock signal with a lower frequency having the same order of absolute jitter as the first clock signal, such that the resulting jitter relative to the second clock signal period is lower than for the first clock signal; producing a low jitter playback clock signal from said second clock signal that is identical in rate to said base clock signal by multiplying and dividing the frequency of the second clock signal with a series of multipliers and dividers such that the jitter of a created clock signal is spread evenly over multiple cycles, resulting in a low jitter playback clock signal; demodulating and decoding said recovered data signal from said received modulated and encoded digital data stream using said low jitter playback clock signal, into a playback digital data stream; and providing said playback digital data stream synchronously with said produced low jitter playback clock signal to a sink device.