An adaptive bandwidth reduction scheme for video coding
An adaptive bandwidth reduction scheme for video coding
复制标题
DOI：
10.1109/iscas.2010.5537728
复制
发表时间：
2010-08
期刊：
影响因子：
--
通讯作者：
Liu Song;Dajiang Zhou;Xin Jin;S. Goto;Peilin Liu
中科院分区：
文献类型：
--
作者：
Liu Song;Dajiang Zhou;Xin Jin;S. Goto;Peilin Liu
在H.264等标准的高清视频解码器中，由于内存数据访问的压倒性数量，带宽需求是一个关键的设计问题。本文提出了一种新的自适应参考帧压缩方案，以减少外部存储器带宽的消耗。提出了一种有效的变长编码，以有效地压缩每个处理单元。提出了一种自适应压缩模式决策单元，可根据图像特性和带宽要求自适应选择最佳压缩模式。结果表明，该方案在图像质量损失较小的情况下实现了有效的带宽压缩。实验结果表明，在相同的带宽缩减比下，与现有方法相比，该算法的增益可达0.7 dB。
In high definition video decoders for the standard like H.264, bandwidth requirement is a critical design issue due to the overwhelming amount of memory data access. This paper proposes a new adaptive reference frame compression scheme to reduce external memory bandwidth consumption. An efficient variable length coding is proposed to compress each processing unit efficiently. Moreover, an adaptive compression mode decision unit is proposed to adaptively choose the best compression mode according to the image characteristic and bandwidth requirement. As a result, the proposed scheme achieves efficient bandwidth reduction with little image quality loss. The experimental results show that, at the same bandwidth reduction ratio the proposed algorithm achieves up-to 0.7 dB gain compared to the existing approaches.