H．264／AVC全零块检测算法原理及性能分析

Analysis of the Principle and Performance about AZB Detection Algorithm for H.264/AVC

在进行变换和量化前进行全零块检测，能大大节省消耗在DCT变换这一费时环节的时间，同时不会影响编码质量，全零块检测技术在实现实时编码场合中有着广泛的应用。本文在理论上对H．264／AVC的全零块检测原理进行了深入分析，给出了4×4全零块检测的一般模型，从检测率及时间性能比较了几个针对H．264／AVC的全零块检测算法，可为研究者在实际应用中实现或选择全零块检测算法提供依据。

Conducting the all-zero block （AZB） detection before the transform and quantization will save the time needed for DCT transform operations, which are intensively time-consuming, and will not affect the encoding quality. The technique of AZB detection is widely used in real-time encoding occasion. This paper is focused on analysis of the principle about AZB detection algorithm for H.264/AVC. The general model of AZB detection is presented. A few AZB detection algorithms for H.264/AVC are compared in detection rate and time performance, which provide the basis for investigators implementing or selecting the appropriate AZB detection algorithm in real applications.