排序方式: 共有26条查询结果,搜索用时 15 毫秒
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MUSICAM编解码算法与解码软件实现 总被引:3,自引:0,他引:3
MUSICAM算法是当今数字音频信号压缩算法中的佼佼者,在详述MUSICAM算法的基础上,着重阐述了其第Ⅱ层算法的编解码及解码算法的具体软件实现,该软件能解所有以MUSICAM算法记录的音频数据,为MUSICAM算法在数字音频领域的应用奠定了基础。 相似文献
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关于混合拾音制式通项公式的探究 总被引:1,自引:1,他引:0
对混合拾音制式传声器摆放中所遵循的规律进行了深入探讨。运用心理声学手段,得到了听觉定位与声音物理参数间的定量关系,进而推导出了混合拾音制式的通项公式,并证明了现行的各种制式只是同一心理声学规律的一组特解,找到了设置拾音器摆放的通用方法,对提高录音作品的质量有一定的指导意义。 相似文献
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The active noise control (ANC) technique attenuates acoustic noise in a flexible and effective way. Traditional ANC design aims to minimize the residual noise energy, which is indiscriminative in the frequency domain. However, human hearing perception exhibits selective sensitivity for different frequency ranges. In this paper, we aim to improve the noise attenuation performance in perceptual perspective by incorporating noise weighting into ANC design. We also introduce psychoacoustic analysis to evaluate the sound quality of the residual noise by using a predictive pleasantness model, which combines four psychoacoustic parameters: loudness, sharpness, roughness, and tonality. Simulations on synthetic random noise and realistic noise show that our method improves the sound quality and that ITU‐R 468 noise weighting even performs better than A‐weighting. 相似文献
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Ira Hirsh was a person who had high standards, for himself as well as others. As an academic leader and scientist he could be forceful and demanding, but his goal was always the betterment of the field. He had an unflagging devotion to psychology as a hard science. Ira published The measurement of hearing (McGraw Hill, 1952), which quickly became the standard textbook in audiologists. In addition to this book, he published over 100 scholarly articles, many of which laid the groundwork for research that has revolutionized such fields as audiology, psychoacoustics, audiometry, and deaf education. For example, Ira was among the first scientists to push auditory research beyond the study of single tones, clicks, or noise bursts. Ira was preceded in death by his wife of 61 years, Shirley, who passed away in 2004. He is survived by his four children, Donald Hirsh of Chapel Hill, Elizabeth Hirsh of Salt Lake City, Eloise Hirsh of New York City, and Richard Hirsh of Chicago; one sister, Jane Davis of Rochester, New York; and seven grandchildren. (PsycINFO Database Record (c) 2011 APA, all rights reserved) 相似文献
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介绍了基于人耳心理声学模型的数字音频压缩技术的杜比数字音频AC-3。深入分析了心理声学及听觉掩蔽原理,根据采用听觉掩蔽原理设计的心理声学模型及滤波器组阐述了AC-3编解码的过程。 相似文献
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一种基于人耳听觉特性的数字音频水印方案 总被引:6,自引:0,他引:6
利用人耳听觉特性,结合MP3压缩特性,对音频信号中人耳不敏感区域的能量进行修改,实现数字水印的嵌入,同时不需要额外的信息作为同步标识.在嵌入信息的检测中,除了少量系统参数外不需要原始信号.实验表明该水印具有很好的隐蔽性,对于常见的攻击能表现出良好的稳健性. 相似文献
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