Re: [Sursound] On 3D audio rendering for signals with the low sampling frequency

2022-08-12 Thread Junfeng Li
Audio Experience Design<https://www.axdesign.co.uk/> > Dyson School of Design Engineering > Imperial College London > Dyson Building > Imperial College Road > South Kensington, SW7 2DB, London > E: l.picin...@imperial.ac.uk > > http://www.imperial.ac.uk/people/l.picinal

Re: [Sursound] On 3D audio rendering for signals with the low sampling frequency

2022-08-12 Thread Junfeng Li
Do not click on links and > attachments unless you recognise the sender. > If you trust the sender, add them to your safe senders list > https://spam.ic.ac.uk/SpamConsole/Senders.aspx to disable email stamping > for this address. > *** > On Thu, Aug 11, 2022 at 06:40

Re: [Sursound] On 3D audio rendering for signals with the low sampling frequency

2022-08-12 Thread Junfeng Li
Dear Steven, In my opinion, the main problem is the limitation of the playback system to 16/8kHz. No matter what we process before output, we have to downsample to 16/8kHz when playback. Therefore, the useful information in high frequencies is lost, which hampers the localization performance.

Re: [Sursound] On 3D audio rendering for signals with the low sampling frequency

2022-08-11 Thread Junfeng Li
Dear Steven and Fons, On Thu, Aug 11, 2022 at 6:22 PM Fons Adriaensen wrote: > On Thu, Aug 11, 2022 at 10:29:12AM +0100, Steven Boardman wrote: > > > You may get a slightly better performance by up sampling the 8khz to > > 44.1/48 before convolution with the hrtf. > > If the upsampling is any

[Sursound] On 3D audio rendering for signals with the low sampling frequency

2022-08-10 Thread Junfeng Li
perception. To improve the sound localization performance, I am now wondering whether there is a certain good method to solve or mitigate this problem in this scenario. Any discussion is welcome. Thanks a lot again. Best regards, Junfeng - Junfeng Li, Ph.D

Re: [Sursound] paper request

2017-10-02 Thread Junfeng Li
Dear all, I have gotten the paper that I requested. Thank you so much for all the kind help you provided. Best regards, Junfeng On Sat, Sep 30, 2017 at 6:24 PM, Junfeng Li <junfeng.li.1...@gmail.com> wrote: > Dear all, > > I found that one interesting paper has been published o

[Sursound] paper request

2017-09-30 Thread Junfeng Li
5, pp. 847-857, 2017. URL: http://www.ingentaconnect.com/contentone/dav/aaua/2017/0103/0005/art00015 Since I cannot download this paper, therefore, I am now looking for your help. Thanks very much. Best regards, Junfeng -------- Junfeng Li, Ph.D. Professor

Re: [Sursound] ICSA 2014, International Conference on Spatial Audio (Germany)

2014-02-20 Thread Junfeng Li
Hi Kees and Fabio, Though I am very interested in this conference, I cannot be there! It is a great pity Regards, Junfeng On Thu, Feb 20, 2014 at 5:58 PM, Fabio Kaiser faboil...@gmail.com wrote: Hi Kees, not so active on list but I will be there! See you, Fabio Am 19.02.2014

Re: [Sursound] Conference.

2014-01-16 Thread Junfeng Li
David, The URL for the conferencee ICSA2014 is http://www.tonmeister.de/index.php?p=veranstaltungen/icsa2014 Regards, Junfeng On Thu, Jan 16, 2014 at 7:05 PM, David Pickett d...@fugato.com wrote: Dave, Your link gives a quai-404 message: Die aufgerufene Seite existiert nicht. Entweder

Re: [Sursound] how to read common loudspeaker format (CLF) file

2013-11-22 Thread Junfeng Li
Dear Bengt-Inge, Thanks a lot. Best regards, Junfeng On Fri, Nov 22, 2013 at 4:40 PM, Bengt-Inge Dalenbäck b...@catt.se wrote: Dear Junfeng At 01:20 2013-11-22, you wrote: Dear Martin, I sent one email to CLF group. Unfortunately, there is no any response. Therefore, I try to look for

Re: [Sursound] how to read common loudspeaker format (CLF) file

2013-11-21 Thread Junfeng Li
Dear Martin, I sent one email to CLF group. Unfortunately, there is no any response. Therefore, I try to look for someone who have some experience in using CLF files. Regards, Junfeng On Fri, Nov 22, 2013 at 1:48 AM, Martin Leese martin.le...@stanfordalumni.org wrote: Junfeng Li junfeng.li

[Sursound] how to read common loudspeaker format (CLF) file

2013-11-20 Thread Junfeng Li
Dear list, I am now trying to develop a program to read and view the loudspeaker directivity. I came across to know the common loudspeaker format (CLF) which is detailed at http://www.clfgroup.org/index.htm. Though some CLF files are provided in binary format, we cannot read it directly. I am

Re: [Sursound] noise occur when using fft + overlap and adding

2013-06-01 Thread Junfeng Li
Hi, This problem might be related several issues: (1) did you use window when overlapping-add; (2) HRTF is a complex value, rather than a real value which is normally used in speech enhancement processing. Multiplication with a complex value in the frequency domain might one of reasons which

Re: [Sursound] EBU workshop on immersive audio over headphones

2013-04-27 Thread Junfeng Li
Hi, Chris, Is anyone able to share the PPTs or audio/video of this upcoming quite valuable conference? Thanks a lot in advance. Best regards, Junfeng Junfeng Li, Ph.D., Professor Institute of Acoustics Chinese Academy of Sciences

[Sursound] head-tracking for 3D audio

2012-02-15 Thread Junfeng Li
Dear list, To realize the high-fidelity binaural 3D audio system, head tracking is a quite important component. Therefore, I am now considering to integrate the head tracking into the current 3D audio system. I believe, many of you have already done this work. Could anyone be able to provide

Re: [Sursound] [ANN] International Conference on Spatial Audio, Nov 10-13 2011, in Detmold, Germany

2011-11-30 Thread Junfeng Li
Dear list, The first workshop conference on spatial audio has been already held in Detmold, Germany. Is anyone able to share the proceedings or video of this exciting conference? Thanks a lot in advance. Regards, Junfeng 2011/8/4 Jörn Nettingsmeier netti...@stackingdwarves.net quick

Re: [Sursound] [ANN] International Conference on Spatial Audio, Nov 10-13 2011, in Detmold, Germany

2011-11-30 Thread Junfeng Li
Dear jörn, Thanks a lot for your information. Please keep me informed once they are ready. Thanks again. Best regards, Junfeng 2011/12/1 Jörn Nettingsmeier netti...@stackingdwarves.net On 11/30/2011 04:47 PM, Junfeng Li wrote: Dear list, The first workshop conference on spatial audio

Re: [Sursound] Can anyone having ISO 9613-1 check this ?

2011-11-26 Thread Junfeng Li
Hi, all, According to the following paper, theh = r * powf (10.0f, C) / p should be correct, where p = P_s/P_{s0}, the relative pressure. Benjamin Bernfeld, Absorption of sound by air: a personal calculator program, J. AES, vo. 28, 1980. If anyone could share the PDF of ISO 9613-1, it will

Re: [Sursound] Sound Externalization Headphone

2011-06-02 Thread Junfeng Li
Dear List, Could anyone share the sound externalized data for headphone rendering with me? Thank you so much. Best regards, Junfeng On Wed, Jun 1, 2011 at 4:54 PM, Junfeng Li junfeng.li.1...@gmail.comwrote: Dear Filippo, all friends, According to your comments, we have processed

[Sursound] Sound Externalization Headphone

2011-05-24 Thread Junfeng Li
Dear List, I am now researching on 3D audio playback/rendering in headphone. One purpose of this work is to playback the 5.1 Audio using headphone. One main problem for sound playback using headphone is in-head localization. Therefore to playback the 5.1 audio with headphone, I am now trying to

Re: [Sursound] Sound Externalization Headphone

2011-05-24 Thread Junfeng Li
Dear Eero, Thanks a lot for your reply. Yeah, the headphone that you mentioned is what I am researching on. What I am wondering is how to implement this headphone technically. Which technique should be used? Is there any further information on this topic? Thank you. Cheers. Junfeng On Tue,

Re: [Sursound] Sound Externalization Headphone

2011-05-24 Thread Junfeng Li
Dear Jorn, well, if you have headphones, you have to be doing binaural synthesis. so what happens is you take the positions of the speakers you want to simulate, and convolve each speaker signal with the appropriate head-related transfer functions for the left and right ear. the next step

[Sursound] 5.1 Audio samples for experiments

2011-05-09 Thread Junfeng Li
Dear list, I am now researching on how to convert 5.1-ch Audio to 2-channel Audio. To do subjective experiments, some typical 5.1-ch Audio samples are needed. Does anyone have these kinds of samples and share with me? Thank you so much. Best regards, Junfeng -- next part

[Sursound] Frequency response measurement using

2011-05-03 Thread Junfeng Li
Dear List, I am now trying to measure the frequency response of a headphone and a loudspeaker using RohdeSchwarz UPV Audio Analyzer. While, I am wondering whether I can directly get the frequency response (the ratio of input to output) using this Audio Analyzer. And is anyone have the quite

[Sursound] cross-talk cancellation used in binaural sound reproduction

2011-02-24 Thread Junfeng Li
Hello, all friends, Is anyone working on binaural sound reproduction using loudspeakers? To reproduce 3D sound using loudspeaker, cross-talk cancellation is needed, as I know. Does anyone know which the most-advanced cross-talk cancellation technique/algorithm? Does anyone have a sample program

Re: [Sursound] cross-talk cancellation used in binaural sound reproduction

2011-02-24 Thread Junfeng Li
Hello, Thanks a lot for so valuable comments and active discussions. While, possibly I did not give a clear explanation of my problem before. therefore, I would like to show the problem again more clearly. I am starting to research on 3D audio reproduction using two/three loudspeakers.