Pulse or digital communications – Receivers – Angle modulation
Reexamination Certificate
2005-10-19
2009-02-10
Odom, Curtis B (Department: 2611)
Pulse or digital communications
Receivers
Angle modulation
C375S371000, C713S400000, C713S401000
Reexamination Certificate
active
07489742
ABSTRACT:
A system for clock recovery in digital video communication includes a delay measurement block for generating PCR input signals and for continuously determining the time interval between successive PCR input signals. The system also includes a first storage device for generating a first PCR signal corresponding to the time interval between arrival of successive PCR input signals and a PCR inter-arrival time computation filtering device to determine the average time of arrival difference between successive PCR packets. The system further includes an error correction device for minimizing error in the average PCR difference between successive PCR packets, a controlled system clock generator coupled to the output of the error correction device to generate system clock, a second storage device for generating a first system clock output, and a controlled clock period difference computation element for computing the clock period difference between the first and second system clock outputs. The controlled clock period difference computation element is coupled at its output to the error correction device to form a feedback circuit to minimize error between the system clock output and successive PCR differences.
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Chakraborty Chiranjib
Chatterjee Subrata
Saha Kaushik
Hogan & Hartson LLP
Odom Curtis B
STMicroelectronics Pvt. Ltd.
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