H.264/AVC High Profile视频编码中自适应变换模块的设计

Design of adaptive transform for H.264/AVC High Profile encoder

提出了一种可配置的整数变换运算单元并将其用于H.264/AVC Hi★Profile视频编码器的自适应变换模块中。通过变换类型信号的配置,该变换单元可以完成相应的变换操作。本设计采用Altera公司的CycloneⅡ系列FPGA进行实现和验证,布局布线后的最大工作频率为63 MHz,采用4个可配置变换单元的变换模块,可以满足HD1080P@50帧/s视频的实时编码要求。

This paper presents a reconfigurable integer transform arithmetic element and it is used in an adaptive transform module for H.264/AVC High Profile encoder. By the transform type information, it can implement the corresponding transform operation in H.264/AVC High Profile encoder. The proposed design is verified and complemented by Altera＇s Cyclone II FPGA. The adaptive transform module adopting four reconfigurable transform arithmetic elements in parallel can meet the real time requirement of HD1080P@50 frames/s video encoding.