电信科学 ›› 2010, Vol. 26 ›› Issue (7): 37-42.doi: 10.3969/j.issn.1000-0801.2010.07.011

• 专题:IPv6技术与应用 • 上一篇    下一篇

一种快速的SVC多模式决策方法

陆奇远1,2,胡 彬1,朝红阳1   

  1. 1 中山大学 广州 510275
    2 广东金融学院计算机系 广州 510521
  • 出版日期:2010-07-15 发布日期:2017-06-20
  • 基金资助:
    国家“863”计划基金资助项目;广东省自然科学基金资助项目

An Fast Multi-Mode Decision Algorithm for Scalable Video Coding

Qiyuan Lu1,2,Bin Hu1,Hongyang Chao1   

  1. 1 Sun Yat-Sen University,Guangzhou 510275,China
    2 Guangdong University of Finance,Guangzhou 510521,China
  • Online:2010-07-15 Published:2017-06-20

摘要:

H.264/AVC SVC为了提供一种可伸缩的视频编码解决方案,增加了许多宏块模式的组合,从而导致模式决策的计算量大幅度增加。本文提出了一种面向SVC的快速多模式决策算法,该方法首先利用模式在层间、帧间和空间的相关性,决定当前宏块的起始搜索模式,然后利用相邻运动向量的差异性决定是否合并或拆分当前分块进行细化搜索。从测试结果来看,本算法在率失真性能不降低的情况下,令模式决策的运算速度提高了数倍。

关键词: 视频编码, 可伸缩视频编码, H.264, 模式决策, 模式预测, 快速算法

Abstract:

Scalable video coding(SVC)is a scalable extension of H.264/AVC that uses a single bitstream to provide multiple temporal, spatial and quality(SNR)resolution. This new standard employs many new modes for encoding a macro-block(MB)at the cost of high computational complexity in mode-decision. This paper proposes a fast mode decision algorithm for SVC. Firstly, the correlation among neighboring layers, frames and MBs is used to predict the most possible mode for current MB. Secondly, a merge and split strategy is further proposed to correct the prediction error. According to our experimental results, the proposed algorithm reduces the computational complexity significantly with negligible coding loss and bit-rate increases.

Key words: video coding, scalable video coding, H.264, multi-mode decision, multi-mode prediction, fast algorithm

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