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A Study on Multi-Channel Video Synchronization of on-Screen Display System

Author: TaoDongSheng
Tutor: GaoBingKun
School: Daqing Petroleum Institute
Course: Communication and Information System
Keywords: Video overlay PLL Synchronous DSP FPGA
CLC: TP391.41
Type: Master's thesis
Year: 2009
Downloads: 95
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Abstract


Overlay video synchronization is an important real-time video processing technology, television technology , transportation, urban security , defense and other fields has been widely used. Because traditional video overlay technology used in processing equipment limitations and application requirements limit , not the system synchronization performance as a research priority. With the development of embedded technology , emphasis on research video sync overlay accuracy and lock technology into the synchronous control video overlay , thereby improving the overall superimposed during synchronization accuracy possible. This paper has designed a system with dual -core processing architecture , the DSP and FPGA co-processing of multi-channel video sync overlay display system. The whole system is divided into two subsystems - DSP and FPGA video coding system video synchronization overlay system . Video coding process in the DSP subsystem , the use of strong performance as a core processing chip DSP DM642 , the encoder uses the H.264 standard , constitute high rate video encoding module . In the FPGA overlay video synchronization subsystem , the combination of FPGA hardware resources on the digital phase locked loop has been improved to achieve a high-performance digital phase-locked loop , and apply it to an image superimposed synchronization process to obtain a higher synchronization accuracy . At the same time , this design also gives the multi-channel video processing solutions. The whole system mainly has two aspects advantages: First, real-time, constituted by the DSP and FPGA co-processing system into full play their own characteristics , rational use of hardware resources , systems with high throughput. Another advantage is low power consumption , high integration, embodied in the entire system from the PC using the entire embedded system design, easy to improve and expand , eventually forming a very high cost chipset integrated solutions .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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