摘要
提出了一种简化参数的谱扩展算法,采用心理声学模型来检测瞬态发生,采用MDCT滤波器组作为时频变换,加入高、低频相关性检测模块来决定高频扩展的细节。实验证明,此算法能有效恢复原信号的高频成分。
A novel approach of the bandwidth extension with simplified parameters is introduced. With this approach, psychoacoustic model is introduced to detect the transient signal, and MDCT is applied to transform the signal from the time domain into the frequency domain. Finally, a correlation detection between high and low frequency contents is developed to determine the details of the high band extension. Experimental results show that the proposed method can improve the perceptual quality of the reconstructed audio obviously.
出处
《电声技术》
2007年第4期45-48,共4页
Audio Engineering
关键词
数字音频
频谱扩展
简化参数
digital audio
bandwidth extension
simplified parameters
