期刊文献+

三洋摄像机调焦聚焦噪声抑制技术研究

Research on SANYO Camera focus-on Noise Suppression Technologies
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摘要 类似数字摄像机的视频采集系统在摄像头缩放或自动对焦时产生较大声噪,回放时主观听觉十分明显。因此需要研究一种抑制一种语音降噪算法,用于消除马达高速旋转引起的可感知机械干扰声噪。本文提出能够平滑调焦和自动聚焦及语音增强的方案。通过改进的鲁棒自适应麦克风阵列方法从带噪信号中恢复语音;同时采用子带后处理法进一步降噪,保证稳定性的前提下降低了语音降噪处理的复杂度并提高信噪比。带噪数据由三洋公司提供,实验在普通会议室进行。实验结果说明,该系统可作为理想的语音降噪设备应用于摄像机录制过程中。 Video recording equipment such as digital cameras often generates mechanical noise when zooming or auto-focusing. The subjective auditory perception is obviously during playback of video.One of the most important challenges is to research a new noise suppression algorithm to minimize the noticeable loud mechanical interference caused by high-speed operation of motors.In this paper, we proposed some technologies enable to smooth zooming and auto-focusing noise and enhance speech.A Modified Microphone Array is introduced as a robust adaptive method to enhance desired signal polluted by stationary noise.This paper also presents one Subband post-filtering approach to further drop out the complexity of system and improve the SNR.Noisy data is collected by SANYO Electric Co.Experiments are finished in the normal meeting room.The results show that this system can be an ideal noise reduction device applied for camera recording process.
出处 《信号处理》 CSCD 北大核心 2011年第4期596-599,共4页 Journal of Signal Processing
基金 863计划(2008AA040201,2008AA02Z414) 国家自然科学基金委员会与微软亚洲研究院联合资助项目60776800 国家自然科学基金委员会与香港研究资助局联合科研基金资助项目60931160443 国家高技术研究发展计划(863计划)项目2008AA040201,2008AA02Z414 国家自然科学基金项目90920302,61005019
关键词 调焦和自动聚焦噪声 噪声消除 麦克风阵列 子带后处理 三洋摄像机 Zooming and auto-focusing Noise Noise Reduction Microphone Array Subband post-filtering SANYO camera
作者简介 杨毅(1978-),女(汉),山东,助理研究员,主要研究语音增强及麦克风阵列。E—mail:yangyy@mail.tsinghua.edu.cn 宋辉(1982-),男(汉),辽宁,博士生,主要研究麦克风阵列及盲分离算法。E—mail:song.carter@gmail.com 刘加(1954-),男(汉),福建,教授,博士生导师,主要研究语音信号处理。E—mail:liuj@mail.tsinghua.edu.cn
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