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Untitled2
四叉树编码和测试的RGB图像解码方案,在matlab7.0中验证可行(Quadtree coding and testing of the RGB image decoding program, verify possible in matlab7.0)
- 2011-05-10 17:08:03下载
- 积分:1
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ecgbeat
bio signal processing ECG
- 2014-11-05 21:47:32下载
- 积分:1
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PQNRchaoliu
电力系统潮流计算算法,用matlab编写(tidal current)
- 2009-12-21 14:58:11下载
- 积分:1
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EGC
说明: 本次实验是运用不同的方法来设计两组滤波器对数据中的EGC信号进行滤波,滤除工频干扰、肌颤噪声和呼吸基线漂移。并分析用不同方法设计的两组滤波器哪一组比较适用于实际应用需要。(EGC)
- 2010-04-29 16:32:38下载
- 积分:1
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TFaceRecognith
这是一个matlab编写的计算人脸识别率的小程序,选选用的图像数据库位ORL数据库。,已通过测试。
(This is a matlab write a small program to calculate the face recognition rate, the election chosen image databases bit ORL database. , Has been tested.)
- 2012-09-30 18:12:46下载
- 积分:1
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liziqunyouh
粒子群优化算法,优化处理,matlab代码,学习必看(Particle swarm optimization, optimization of processing, matlab code, learning must-see)
- 2013-04-21 22:03:20下载
- 积分:1
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_auto_contrast_
Image auto contract matlab
- 2011-12-21 19:05:07下载
- 积分:1
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CHAOGAOSI
研究表明超高斯分布更加贴近语音信号的实际分布,然而语音信号很难用单一的概率密度
函数准确描述,针对这一情况,提出了一种用超高斯混合模型对语音信号幅度谱建模的新方法,并推导了
基于此模型的幅度谱最小均方误差估的估计式。仿真结果表明:与传统的短时谱估计算法相比,该算法不
仅能够进一步提高增强语音的信噪比,而且可以有效减小增强语音的失真度,提高增强语音的主观感知
质量。 (Recent research indicates that the speech spectral amplitude distributions could
be fairly described with super-Gaussian probability density function. However, the complexity
of speech signal determines that the distribution statistics ofspeech signal could not be well
described by single simple function. Thus a super-Gaussian mixture model for speech spectral
amplitude is proposed, and with this model, a minimum mean-square error (MMSE) estimator for speech
signals spectral amplitude is derived. The simulation results show that this algorithm based on
Gaussian and super-Gaussian speech model could achieve better noise suppression and lower speech
distortion as compared with the conventional short-time spectral amplitude estimation algorithm. )
- 2014-01-18 10:13:52下载
- 积分:1
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GUI 音频信号处理
1、信号频率、幅值和相位估计(1)频率(周期)检测对周期信号来说,可以用时域波形分析来确定信号的周期,也就是计算相邻的两个信号波峰的时间差、或过零点的时间差。这里采用过零点(ti)的时间差T(周期)。频率即为f = 1/T,由于能够求得多个T值(ti有多个),故采用它们的平均值作为周期的估计值。(2)幅值检测在一个周期内,求出信号最大值ymax与最小值ymin的差的一半,即A = (ymax - ymin)/2,同样,也会求出多个A值,但第1个A值对应的ymax和ymin不是在一个周期内搜索得到的,故以除第1个以外的A值的平均作为幅值的估计值。(3)相位检测采用过零法,即通过判断与同频零相位信号过零点时刻,计算其时间差,然后换成相应的相位差。φ=2π(1-ti/T),{x}表示x的小数部分,同样,以φ的平均值作为相位的估计值。
- 2022-07-09 20:05:17下载
- 积分:1
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SJXL
时间序列分析中对于平稳时间序列建立模型,并实现模型的预测。(Time series analysis for stationary time series model, and the realization of the forecast model.)
- 2007-12-14 21:47:17下载
- 积分:1