search for: binaur

...r will make assumptions for channel seperation to save bits. earch the archives for "ambisonics" - you may find what you are looking for. Myles -----Original Message----- From: p-h-g [mailto:p-h-g@ifrance.com] Sent: Monday, May 05, 2003 10:31 To: vorbis@xiph.org Subject: [vorbis] with binaural-(or dummy head-or Kunstkopf-) recording, does vorbis keep the 3D sound? <p><p>with binaural-(or dummy head-or Kunstkopf-) recording, does vorbis keep the 3D sound?   see John Sunier's "WHAT IS BINAURAL?" http://www.binaural.com/SunBinArticle.html   could not find any...

...audio (via the panner or directly input) into Ogg/Vorbis brings an interesting challenge: What do we do with the audio after decoding it? The following sane options exist: A) Simply output the B-format audio B) Produce a downmix 1) Mono. 2) Stereo blumlein crossed pairs 3) Stereo UHJ 4) binaural C) Produce speaker feeds 1) Fully generalizable speaker feed decoder (such as http://www.kokkinizita.net/linuxaudio/adec-pict.html) 2) G-format (fixed decode for the 5.1 layout) (A) is pretty much a no-brainer, and minus some polish on marking up the channel mapping we pretty much alre...

...by Google, but it's a new format; the FuMa format is widely used and could easily be supported as well. https://en.wikipedia.org/wiki/Ambisonic_data_exchange_formats Down-mixing to stereo is a sort of ambisonic decoding; it is simple and could be included in the Opus decoder. But decoding to binaural or 5.1 is not trivial. Usually, decoding ambisonics is the job of a dedicated decoder, and depends on the role, number and positions of output channels. so I don't think that the Opus decoder should be involved, unless approximate methods could be considered good enough as default. -- Marc

...do have a 2.5mm plug connection - and we do have many many headsets we used with normal PC's before (so 2x3.5mm plug connection). Does anyone here know where i can get an adapter 1x2.5mm -> 2x3.5mm ? Or can anyone here tell me where to get good (and not to expensive) 2.5mm plug connection binaural headsets ? best regards, Wolfgang

...use > a different channel mapping for simplicity. As UHJ only have 2 channels, and is directly stereo and mono compatible, it would nice to have it identified as UHJ in the metadata. There's no need for decoding at this point; an external decoder could take care of it for speaker arrays or binaural listening. -- Marc

...xpert. > > I agree. We are decoupling channels and setting the bitrate > allocation to give progressively fewer bits to higher order channels. > We have also explored dynamic interchannel bitrate allocations based > on a worst case analysis (over all head rotations) of rendered > binaural masking levels. We did not find dynamic allocations to > improve subjective quality enough to explore that potential encoder > optimization in depth. So, channels will stay uncoupled for Ambisonics? That would be great, because considering how good Opus already is, I don't think that m...

...as I'm not a codec > expert. I agree. We are decoupling channels and setting the bitrate allocation to give progressively fewer bits to higher order channels. We have also explored dynamic interchannel bitrate allocations based on a worst case analysis (over all head rotations) of rendered binaural masking levels. We did not find dynamic allocations to improve subjective quality enough to explore that potential encoder optimization in depth. > The allowed number of channels should not be restrained to a list like > 1,4,9,16,etc, because ambisonics can support mixed-order schemes. Th...

Hi, Two related news here. First, I've merged in support for stereo (or more channels) acoustic echo cancellation in mainline. The standard AEC remains the same, but I added a speex_echo_state_init_mc() call that takes the number of speakers and microphones. Now, one of the consequence of this new work is that by merging this work into the main tree, I had to do things in git that svn just

Hi, I've been asked for a headset recommandation for Polycom SoundPoint IP phones. Since I believe they use a pretty standard headset jack (correct me if I am wrong) it's really a general recommandation on headset. Regards, Mike -------------- next part -------------- An HTML attachment was scrubbed... URL:

...(Reported by Joshua Colp) * ASTERISK-27123 - confbridge: Name recordings are left on filesystem (Reported by Sergej Kasumovic) * ASTERISK-27122 - chan_iax2: On reload MWI taskprocessors keep adding up (Reported by Sergej Kasumovic) * ASTERISK-26807 - sounds: New 3-D Binaural audio features require new sound prompts (Reported by Rusty Newton) * ASTERISK-25816 - French conf-adminmenu, conf-usermenu prompts differ in content from the English files (Reported by Benoit Duverger) * ASTERISK-26274 - Resolve open sounds issues and then create...

...(Reported by Dan Jenkins) * ASTERISK-27123 - confbridge: Name recordings are left on filesystem (Reported by Sergej Kasumovic) * ASTERISK-27122 - chan_iax2: On reload MWI taskprocessors keep adding up (Reported by Sergej Kasumovic) * ASTERISK-26807 - sounds: New 3-D Binaural audio features require new sound prompts (Reported by Rusty Newton) * ASTERISK-25816 - French conf-adminmenu, conf-usermenu prompts differ in content from the English files (Reported by Benoit Duverger) * ASTERISK-26274 - Resolve open sounds issues and then create...

Cool, thanks for all the great comments. I think we agree now on that the "find mp3 before encoding" feature would not be a good idea to implement in the flac core. As Brian pointed out, it might be a better idea to create a program that automatically checks if a flac might have been an mp3 source. My first suggestion was to use FFT, because I know that 128kbps mp3 have a low-pass

...r overlap dialling (Reported by Richard Begg) * ASTERISK-26846 - chan_sip: Add rtcp-mux support (Reported by Sean Bright) * ASTERISK-26568 - pbx_spool: OUTGOING_RETRY variable (Reported by Roman Shubovich) * ASTERISK-26292 - app_confbridge: 3D-Conferencing via Binaural Synthesis (Reported by Dennis Guse) * ASTERISK-23828 - pjsip - Need a command to list active SIP subscriptions (Reported by Rusty Newton) * ASTERISK-26559 - app_queue: New service level calculation (Reported by Sebastian Gutierrez) * ASTERISK-26658 - Add abili...

I'm a mathematician and programmer working on experimental surround sound techniques. Some of the ideas I'm working on require dozens of channels. These channels are often highly correlated and are very well suited to compression. I'm new to Vorbis. Does it attempt to address such issues? Thanks, --Richard --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project

...r overlap dialling (Reported by Richard Begg) * ASTERISK-26846 - chan_sip: Add rtcp-mux support (Reported by Sean Bright) * ASTERISK-26568 - pbx_spool: OUTGOING_RETRY variable (Reported by Roman Shubovich) * ASTERISK-26292 - app_confbridge: 3D-Conferencing via Binaural Synthesis (Reported by Dennis Guse) * ASTERISK-23828 - pjsip - Need a command to list active SIP subscriptions (Reported by Rusty Newton) * ASTERISK-26559 - app_queue: New service level calculation (Reported by scgm11) * ASTERISK-26658 - Add ability for dialpl...

...(Reported by Dan Jenkins) * ASTERISK-27123 - confbridge: Name recordings are left on filesystem (Reported by Sergej Kasumovic) * ASTERISK-27122 - chan_iax2: On reload MWI taskprocessors keep adding up (Reported by Sergej Kasumovic) * ASTERISK-26807 - sounds: New 3-D Binaural audio features require new sound prompts (Reported by Rusty Newton) * ASTERISK-25816 - French conf-adminmenu, conf-usermenu prompts differ in content from the English files (Reported by Benoit Duverger) * ASTERISK-26274 - Resolve open sounds issues and then create...

...by Torrey Searle) - [ASTERISK-26686 <https://issues.asterisk.org/jira/browse/ASTERISK-26686>] - res_pjsip: Lock inversion in transport management (Reported by Ross Beer) - [ASTERISK-27939 <https://issues.asterisk.org/jira/browse/ASTERISK-27939>] - [patch] bridge_softmix_binaural: Enable FFTW3 in Solaris 11. (Reported by Alexander Traud) - [ASTERISK-27783 <https://issues.asterisk.org/jira/browse/ASTERISK-27783>] - res_pjsip_pubsub: apparent crash on shutdown (Reported by Kevin Harwell) - [ASTERISK-27870 <https://issues.asterisk.org/jira/browse/ASTE...