基于FPGA的高吞吐率可变长编码实现

High-throughput VLC design based on FPGA

介绍了一种通过两级查找表法实现可变长编码的方法,先对单个的游程编码数据进行可变长编码,再同时合并各个可变长编码码字形成码流输出;对两个查找表进行优化,节约了存储空间。采用流水线操作,提高数据处理能力,而且用RAM实现两个查找表,提高了系统可扩展性。通过FPGA的仿真,结果表明,可变长编码方法可很好地应用于数据吞吐量大的电视技术压缩编码中。

A high\|throughput popeline variable length coding strategy is presented, which encodes run\|level coders individually by two steps look up tables and combines them to form steam. The presented strategy uses lesser memory space and has favourable expansibility by two RAM look up tables. The result of FPGA simulation shows that the presented strategy adapts to high\|throughput data HDTV encoding.