一种改进的MDCT域频率估计方法

2014 IEEE China Summit & International Conference on Signal and Information Processing (ChinaSIP) Pub Date : 2014-07-09 DOI:10.1109/ChinaSIP.2014.6889214

Yujie Dun, Guizhong Liu

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引用次数: 2

摘要

本文提出了一种改进的低复杂度、高精度的修正离散余弦变换(MDCT)域频率估计方法。该方法是由对称窗口下正弦波的MDCT系数解析表达式导出的。利用这个表达式，可以在正弦窗口和Kaiser-Bessel派生窗口(KBD)下进行频率估计。根据正弦窗和KBD窗的特点，给出了不同的估计方法。所提出的方法能够避免估计错误和较大的估计误差。实验表明，与传统方法相比，该方法的估计精度有很大提高，可用于压缩域音频处理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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An improved MDCT domain frequency estimation method

In this work, an improved low complexity high precision method for frequency estimation in the Modified Discrete Cosine Transform (MDCT) domain is presented. The method is derived from the analytical expression of the MDCT coefficients of a sinusoid under symmetric windows. With this expression, frequency estimation under the sine and the Kaiser-Bessel Derived (KBD) windows can be made. This paper presents different procedures of the estimation under the sine and KBD windows according to their characteristics. The presented procedures have the ability to avoid estimation mistakes and large estimation errors. The method is tested to show great enhancement of the estimation precision when compared with the traditional methods, and can be used in compressed domain audio processing.

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2014 IEEE China Summit & International Conference on Signal and Information Processing (ChinaSIP)

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