一种新的视频编码变换与量化方法研究

变换和量化在视频编码起着举足轻重的作用,本文简要介绍了变换与量化的基本原理,提出了一种基于能量集中率的变换基选择方法,在考虑了变换的性能与计算复杂度的同时将变换基的影响模型化、参数化。此外,在控制复杂度的基础上提出了一种提高量化精度的方法。经实验验证新算法均衡复杂度的同时取得了很好的效果。

A New Transform and Quantization Research of Video Coding

Transform and quantization are very important in the video coding. After introducing the theory of transform and quantization, a novel method of choosing transform basis is proposed in this paper based on energy compaction. Both the transform efficiency and the computation complexity are taken into consideration jointly in forming a parameterized model for transform effect. In order to improve the quantization accuracy, a new approach is further proposed based on complexity control. Testing resuits prove good performance of our algorithm with attractive complexity balance.