| 频变扩展重迭变换的快速算法 | |
| 阎建新 ; 窦维蓓 ; 董在望 ; YAN Jian-xin ; DOU Wei-bei ; DONG Zai-wang | |
| 2010-06-09 ; 2010-06-09 | |
| 关键词 | 时频分析 扩展重迭变换 非均匀滤波器组 快速算法 time-frequency analysis extended lapped transform nonuniform filter banks fast algorithm TN912.3 |
| 其他题名 | Fast algorithm on frequency-varying extended lapped transforms |
| 中文摘要 | 频变扩展重迭变换(FV-ELT)是一类具有灵活时频分辨率特性的非均匀滤波器组,适用于音频编码中时频映射处理部分。本文主要给出基于DCT-IV的FV-ELT快速算法,并给出复杂度计算公式。最后以几种典型滤波器组应用结构为例,给出了所需乘加运算次数。与直接计算模式相比,此快速算法能有效地降低FV-ELT的运算复杂度。; Frequency-Varying Extended Lapped Transform(FV-ELT) is a set of nonuniform filter banks with a flexible time-frequency resolution property,which is adapted to time-frequency mapping of audio encoding.The fast algorithm of FV-ELT based on DCT-IV is presented in the paper,and the complexity expression is also derived.According to a few examples for filter banks with typical structures,the number of multiplications and additions are figured out.The complexity can be dramatically reduced while compared with a direct calculation from the definition of FV-ELT. |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/54240]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 阎建新,窦维蓓,董在望,等. 频变扩展重迭变换的快速算法[J],2010, 2010. |
| APA | 阎建新,窦维蓓,董在望,YAN Jian-xin,DOU Wei-bei,&DONG Zai-wang.(2010).频变扩展重迭变换的快速算法.. |
| MLA | 阎建新,et al."频变扩展重迭变换的快速算法".(2010). |
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