A low delay transmission method of multi-channel video based on FPGA

2017 International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Fu, Weijian^1 ; Wei, Baozhi^1 ; Li, Xiaobin^1 ; Wang, Quan^1,2 ; Hu, Xiaofei^1

School of Beihang University, Beijing, China^1

State Key Laboratory of Virtual Reality Technology and Systems, Beijing, China^2

关键词: Conversion process;    Direct memory access;    Scheduling methods;    Transmission methods;    Transmission rates;    Video format conversion;    Video monitoring;    Video transmissions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/322/5/052032/pdf
DOI  :  10.1088/1757-899X/322/5/052032

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In order to guarantee the fluency of multi-channel video transmission in video monitoring scenarios, we designed a kind of video format conversion method based on FPGA and its DMA scheduling for video data, reduces the overall video transmission delay.In order to sace the time in the conversion process, the parallel ability of FPGA is used to video format conversion. In order to improve the direct memory access (DMA) writing transmission rate of PCIe bus, a DMA scheduling method based on asynchronous command buffer is proposed. The experimental results show that this paper designs a low delay transmission method based on FPGA, which increases the DMA writing transmission rate by 34% compared with the existing method, and then the video overall delay is reduced to 23.6ms.