码流分配决策的VHDL实现及仿真.pdfVIP

2010年第04期，第43卷 通 信 技 术 Vol.43，No.04,2010 总第220期 Communications Technology No.220,Totally 码流分配决策的 VHDL 实现及仿真 王海荣， 邓家先， 易巧玲 （海南大学 信息科学与技术学院，海南 海口 570228） 【摘 要】为解决图像码流庞大带来的存储和传输困难，提出了一种针对多路图像译码的码流分配决策，并采用VHDL语 言来实现。码流分配前，对图像头文件进行检测，采用两片外挂 RAM 对检测后的码流进行乒乓操作后，送入多路并行图像处 理模块，处理后的码流采用同样的分配方式进行缓存。结果表明该决策真正实现了图像码流传输的实时性和准确性，而且其 可移植性强，可以应用到图像处理的很多领域，成为提高码流缓存和传输速度的桥梁。 【关键词】码流分配；多路并行；乒乓操作；现场可编程逻辑门阵列；超高速集成电路硬件描述语言 【中图分类号】TN919.81 【文献标识码】A 【文章编号】1002-0802(2010)04-0004-03 VHDL Implementation and Simulation of Code-stream Assignment Policy WANG Hai-rong， DENG Jia-xian， YI Qiao-ling （Information Science and Technology School, Hainan University, Haikou Hainan 570228, China） 【Abstract】In order to resolve difficulties in storage and transmission produced by the huge image code-stream, a code-stream assignment policy for multi-channel image coding is proposed, and implemented with VHDL. Before assigning code-stream, the image header file is detected, the Ping-Pong operation on the detected code stream carried out by using 2 expanded RAM, then sent to the multi-channel parallel image processing module. The processed code-stream is also stored with the same way. The experiment results indicate that the policy could really achieve the real-time feature and accuracy of image code stream transmission, and for its portability, could serve as a bridge to enhance the speed of code-stream transmission and cache., and thus is applicable to successive image processin