频带复制技术的分析和测试  

Testing and Analysis of Spectral Band Replication Technology

作　　者：郭庆巍[1] 张海波[1] 马鸿飞[1] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,西安710071

出　　处：《电子质量》2007年第12期51-54,共4页Electronics Quality

摘　　要：研究高质量的高频重建技术是音频压缩编码技术的必然需求。频带复制技术能够大幅提高感知音频编码器的压缩效率,业已经成为MPEG-4version3音频扩展标准。频带复制技术只需提取少量参数,就可在接收端重建高频信号,从而在低比特率下能得到更高的音频质量。本文论述了频带复制技术的原理和特点,并对SBR性能进行评测。It is necessary for audio compression coding to develop a high-quality technology of High Frequency Reconstruction. Spectral Band Replication （SBR） significantly improves the efficiency of perceptual audio codecs and has been chosen as audio extension standard of MPEG-4 version 3. SBR only needs a few parameters for reconstructing high frequency signaLThus, it allows higher audio quality at low bitrates. The principle and characteristics of SBR are discusse in this paper, and its performance is evaluated.

关 键 词：频带复制 高频重建 音频编码 ENHANCED AACPLUS 

分 类 号：TN912.3[电子电信—通信与信息系统]