关键词: 视频阵列处理器, 分布式存储结构, 目录协议, 高速缓存, 层次化

Abstract: With the continuous development of video coding standards, the amount of data processed by video codec algorithm is also increasing sharply. Although the parallel processing technology of multi-core architecture promote the speed of processing of video codec algorithm, it makes the memory structure becomes the bottleneck of the whole codec system. Aiming at the characteristics of video codec algorithm of the locality accessing data, the high frequency of data exchange between different algorithm, a large number of temporary internal data does not need to interact, this paper designs and implements a multi level distributed storage structure which contains private storage layer and shared storage layer. The design has been tested on the FPGA development board of the company of Xilinx, the experimental results show that the structure not only maintain the simplicity and scalability, but also can provide data access bandwidth which can up to be 9.73 GB/s, meet the needs of video codec algorithm data access.

Key words: video array processor, distributed storage architecture, directory protocol, cache, hierarchical