摘要
将ITU-RBS.1387中评判音频质量所采用的声学模型中的基本模式与实际的音频编码系统相结合,对该声学模型的特点进行了理论分析,提出了相应的改进措施以便其应用于实际的音频编码系统中。在我国最新制定的AVS音频编码标准参考编码器上,分别将该声学模型和MPEG-2AAC音频标准的心理声学参考模型2进行了实现,并将模型输出掩蔽参数以及主观听觉试验结果进行了对比验证。试验结果证明该文设计的应用于音频编码器的新声学模型是合理可行的。
For the purpose of improving the coding effficiency,this paper attempts to combine acoustic model in basic version of BS.1387 with perceptual audio coding.An acoustic model based on BS.1387 applied to latest AVS reference audio coder of China instead of MPEG psychoacoustic model 2 is presented,and corresponding improvements and adjustments are proposed.The performance of this model is investigated by comparing its output to result obtained from MPEG psychoacoustic model 2.The experimental results indicate that the proposed psychoacoustic model is feasible.
出处
《计算机工程与应用》
CSCD
北大核心
2006年第11期6-9,共4页
Computer Engineering and Applications
基金
国家863高技术研究发展计划资助项目(编号:2004AA119010)
