摘要
音频信号的有损压缩编码为实现高的压缩比,往往会将高频部分删除,这样势必导致音质下降。为此,很多研究工作围绕恢复高频展开,其技术统称为高频重建。提出了一种基于最小熵的方法进行高频重建,试验结果表明重建声音主观听觉良好。
In audio coding, the high frequency components of signals will be removed for higher compression ratio, hence lead to great degradation of quality. Therefore, a new technique called high frequency reconstruction （HFR） comes out to improved the quality of reconstructed sound. This paper introduces a novd approach of HFR, which is based on minimum entropy. Experimental results show that the subjective testing of reconstructed sound is good.
出处
《电声技术》
2006年第2期37-40,共4页
Audio Engineering
关键词
数字音频
高频重建
最小熵
谱估计
Digital audio
High Frequency Reconstruction（HFR）
minimum entropy
spectrum estimation
