Subject: request suggestions on speaker and far-talk microphone products From: "N.H. ZHENG" <nhzheng@xxxxxxxx> Date: Fri, 9 Jun 2006 15:43:48 +0800This is a multi-part message in MIME format. ------=_NextPart_000_0107_01C68BDB.800CD0A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dear all, We are currentcly considering creating a speech database for speech = recognition in meeting room environment. What we have at hand is a = high-quality database collected by close-talk microphone. What we going = to do is to playback the existing speech files via a speaker (or = speakers in different locations ) and re-collected by a far-talk = microphone (or microphone array). Are there any suggestions for speaker = and microphone products for this project? We hope that the ouput of the = speaker could be as close as possible to the natural speech, which means = that we may need to equalize the frequency response of the close-talk = microphone and the speaker. To your experience, is it possible to = achieve this goal by equalization or any ohter signal processing = techniques? Best regards, Nengheng Zheng Digital Signal Processing & Speech Technology Laboratory Department of Electronic Engineering The Chinese University of Hong Kong Shatin, NT, Hong Kong SAR of China Tel: +852-2609-8271 Fax: +852-2603-6868 Emali: nhzheng@xxxxxxxx web: www.ee.cuhk.edu.hk/~nhzheng ------=_NextPart_000_0107_01C68BDB.800CD0A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2873" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>Dear all,</DIV> <DIV> <DIV> </DIV> <DIV>We are currentcly considering creating a speech database for speech = recognition in meeting room environment. What we have at hand is a = high-quality=20 database collected by close-talk microphone. What we going to do is to = playback=20 the existing speech files via a speaker (or speakers in different = locations )=20 and re-collected by a far-talk microphone (or microphone array). = Are there=20 any suggestions for speaker and microphone products for this project? We = hope=20 that the ouput of the speaker could be as close as possible to=20 the <STRONG><EM>natural speech</EM></STRONG>, which means that we = may need=20 to equalize the frequency response of the close-talk microphone and the = speaker.=20 To your experience, is it possible to achieve this goal by equalization = or any=20 ohter signal processing techniques?</DIV> <DIV> </DIV> <DIV>Best regards,</DIV> <DIV> </DIV> <DIV>Nengheng Zheng</DIV> <DIV> </DIV> <DIV>Digital Signal Processing & Speech Technology = Laboratory<BR>Department=20 of Electronic Engineering<BR>The Chinese University of Hong = Kong<BR>Shatin, NT,=20 Hong Kong SAR of China<BR>Tel: +852-2609-8271<BR>Fax: = +852-2603-6868<BR>Emali:=20 <A = href=3D"mailto:nhzheng@xxxxxxxx">nhzheng@xxxxxxxx</A></DIV> <DIV>web: <A=20 href=3D"http://www.ee.cuhk.edu.hk/~nhzheng">www.ee.cuhk.edu.hk/~nhzheng</= A></DIV></FONT></DIV></BODY></HTML> ------=_NextPart_000_0107_01C68BDB.800CD0A0--