Invention Grant
US07489742B2 System and method for clock recovery in digital video communication
有权
数字视频通信中时钟恢复的系统和方法
- Patent Title: System and method for clock recovery in digital video communication
- Patent Title (中): 数字视频通信中时钟恢复的系统和方法
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Application No.: US11254069Application Date: 2005-10-19
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Publication No.: US07489742B2Publication Date: 2009-02-10
- Inventor: Kaushik Saha , Chiranjib Chakraborty , Subrata Chatterjee
- Applicant: Kaushik Saha , Chiranjib Chakraborty , Subrata Chatterjee
- Applicant Address: IN Noida, Uttar Pradesh
- Assignee: STMicroelectronics Pvt. Ltd.
- Current Assignee: STMicroelectronics Pvt. Ltd.
- Current Assignee Address: IN Noida, Uttar Pradesh
- Agency: Hogan & Hartson LLP
- Priority: IN2052/DEL/2004 20041020
- Main IPC: H04L27/00
- IPC: H04L27/00

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.
Public/Granted literature
- US20060209989A1 System and method for clock recovery in digital video communication Public/Granted day:2006-09-21
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