摘要
针对现有心理声学模型算法复杂度高、不易实现的问题,设计了一种算法简单的心理声学模型.该模型直接计算修正离散余弦变换参数的最大和最小主导分量的扩展包络,并以此为基础,利用谱平坦测度函数计算心理声学模型的掩蔽门限.与传统模型相比,该模型的算法复杂度降低了30%到50%,并能够估算出与其他心理声学模型相近的掩蔽门限.
The psychoacoustic model is difficult to implement because of its high complexity.In order to solve the problem,a simple and new psychoacoustic model is designed.This model calculates the masking threshold by using the envelopes of the maximum and minimum dominative components obtained directly from MDCT coefficients,and using spectral flatness measure of MDCT coefficients.The complexity of the designed model is about 30% to 50% lower than that of conventional models with the same estimation results of the masking threshold when using other psychoacoustic models.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2010年第5期842-845,878,共5页
Journal of Xidian University
基金
陕西省自然科学基础研究计划资助项目(2006F10)
华为科技基金资助项目
高等学校创新引智计划资助项目(B08038)
关键词
心理声学模型
音频编码
音频处理
数据压缩
psychoacoustic model
audio coding
audio processing
data compression
