search for: 10khz

Thanks! Btw, have you tried using SBR-technology or similar with speech codecs? That might be a good idea I thought.. But I don't know if it produces as good quality with speech codecs as it does for music codecs. Do you know if there is any open source variant of SBR? /Pontus -----Ursprungligt meddelande----- Från: owner-speex-dev@xiph.org [mailto:owner-speex-dev@xiph.org]För Jean-Marc

...h speech codecs? That >might be a good idea I thought.. But I don't know if it produces as good >quality with speech codecs as it does for music codecs. Do you know if there >is any open source variant of SBR? > SBR exploits a limitation of your ears. At high frequencies (like over 10kHz) you cannot determine pitch with any accuracy. You hear up to 15kHz to 20kHz (depending on age and other factors), but you really cannot identify pitch at these frequencies. You cannot even determine if content above about 10kHz is properly harmonically related to the lower pitched fundamentals...

An idea would be like for WMA 9 lower bitrates (32-42-48Kbps) to use a 'crystallizer'; which is basically a harmonics booster focussed at transposing sharp tones some octaves higher. Eg: A file has been recorded @ 20khz computer (or 10khz real life) to preserve space. While playing back the file sounds a bit mushy, almost as if someone was speaking through a cardboard wall. The higher frequencies are missing, and you can easily perceive that the file is a low bitrate file. By harmonically transposing frequencies from 6 to 10Khz...

...ion can take 2 forms. a) Minimum Phase deviations of XYZ from W. These start happening above about 6kHz with present Soundfields. b) Random Phase deviations of XYZ from W. These occur at High Frequencies when a real Soundfield Mike no longer has flat frequency response in all directions. Above 10kHz with present Soundfields. - B-format from Ambisonically panned material (as opposed to natural Soundfield recordings) will be perfectly in phase so this recommendation will not result in loss. This needs investigating. Presently no Ambisonic effects units use -- No virus found in this outgoi...

...;might be a good idea I thought.. But I don't know if it produces as good > >quality with speech codecs as it does for music codecs. Do you know if there > >is any open source variant of SBR? > > > SBR exploits a limitation of your ears. At high frequencies (like over > 10kHz) you cannot determine pitch with any accuracy. You hear up to > 15kHz to 20kHz (depending on age and other factors), but you really > cannot identify pitch at these frequencies. You cannot even determine if > content above about 10kHz is properly harmonically related to the lower >...

...senc from opus-tools 0.2-3-gf5f571b ENCODER_OPTIONS=--bitrate 56 --vbr --comp 5 ALBUM=Test-Sweeps ARTIST=Audacity COMMENT=60s logarithmic sweep (0-20kHz): 5s=10Hz, 10s=20Hz, 15s=39Hz, 20 s=78Hz, 25s=156Hz, 30s=312Hz, 35s=625Hz, 40s=1.25kHz, 45s=2.5kHz, 50s=5kHz, 55s= 10kHz, 60s=20kHz COMMENTS=60s logarithmisch DATE=2016 TITLE=Sweep (0-20kHz at 96kHz) log TRACKNUMBER=2 Opus stream 1: Pre-skip: 312 Playback gain: 0 dB Channels: 1 Original sample rate: 96000 Hz Packet duration: 20.0ms (max), 20....

After doing an informal (128k) listening test, I have concluded that I prefer Beta4 over RC2. The 16kHz low-pass on the RC2 encoder makes it sound like FM radio. Both encoders SEEM to have a couple of dB bump at 10kHz. JT --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe message...

Hi there ! I checked Vorbis' performace for mono files at approx. 64-80 kbps (it does a good job) and I'm wondering why the current OggEnc still uses Point-Stereo (>10kHz) for -q4 and -q5 I know, we're usually unable to percieve those phase correlations above 10 kHz, But a Dolby Prologic Decoder isn't. I think a future version of OggEnc which is able to use a user-selectable stereo mode would be graet. I think back to the time, where everyone just realize...

...a logarithmisch sweep. Is that a fixed number of Hertz per second (SoX calls that linear)? Or a fixed number of semitones per second (SoX calls that exponantional)? (The ogg comment says 5s=10Hz, 10s=20Hz, 15s=39Hz, 20s=78Hz, 25s=156Hz, 30s=312Hz, 35s=625Hz, 40s=1.25kHz, 45s=2.5kHz, 50s=5kHz, 55s=10kHz, 60s=20kHz so it seems the frequency rises logarithmically.) $ sox -c 1 -r 96k -b 16 -n /tmp/sweep.wav synth 60 sin create 1-20 gain -3 > With Opus I noticed that the file size for 48kHz and 48 kbps > compared to 96kHz Vorbis at 31kbps is about double the size Your opusenc line says "...

...a logarithmisch sweep. Is that a fixed number of Hertz per second (SoX calls that linear)? Or a fixed number of semitones per second (SoX calls that exponantional)? (The ogg comment says 5s=10Hz, 10s=20Hz, 15s=39Hz, 20s=78Hz, 25s=156Hz, 30s=312Hz, 35s=625Hz, 40s=1.25kHz, 45s=2.5kHz, 50s=5kHz, 55s=10kHz, 60s=20kHz so it seems the frequency rises logarithmically.) $ sox -c 1 -r 96k -b 16 -n /tmp/sweep.wav synth 60 sin create 1-20 gain -3 > With Opus I noticed that the file size for 48kHz and 48 kbps > compared to 96kHz Vorbis at 31kbps is about double the size Your opusenc line says "...

Don't know if anybody is still missing the lame oggenc features for resampling, lowpass/highpass filters etc, but I wrote a little script that uses sox to do all the stuff I need to real-time encode oggenc from the radio, or any input device. #!/bin/bash DATE=`date '+%m-%d-%Y-(%H.%M)'` DESTIN=/video/music/perftoday export DATE=$DATE'-PerformanceToday.ogg' sox -V -r 44100 -c

...ith Opus 1.3 I converted a tone sweep with a sample rate of 96kHz > >> > (just for fun). Before I had converted that from WAV to FLAC, and to Vorbis > >> > without problems. >> >> >> >> 30s=312Hz, 35s=625Hz, 40s=1.25kHz, 45s=2.5kHz, 50s=5kHz, 55s=10kHz, >> > 60s=20kHz >> >> so it seems the frequency rises logarithmically.) >> >> >> >> $ sox ‑c 1 ‑r 96k ‑b 16 ‑n /tmp/sweep.wav synth 60 sin create 1‑20 gain ‑3 >> >> >> >> > With Opus I noticed that the file size for 48kHz an...

...of Eberhard Zwicker's "Analogmodell". That model consists of analog electrical elements. ftp://ftp.tnt.uni-hannover.de/pub/papers/2000/Diss-FB.pdf Input: Raw 100KHz monoural 16bit audio Output: hair cell excitation signal at 251 equidistant locations in the cochlea at 10KHz. Anyone have a copy of sox safely hacked to resample to 100KHz? I removed the check, but I'm worried about internal overflow conditions. --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to...

Hi there, I am getting very low throughput (around 0.29Mbps) while running netperf benchmark for guest to guest communication on a single physical host. To analyse where the time is spent in hypervisor I wanna use profiling. Please help me choosing good profiler according to my requirments. Should it be better in my case, Xentrace, gprof, xenoprof  or Oprofile. Is it possible to use some vtune

Hi there, I am getting very low throughput (around 0.29Mbps) while running netperf benchmark for guest to guest communication on a single physical host. To analyse where the time is spent in hypervisor I wanna use profiling. Please help me choosing good profiler according to my requirments. Should it be better in my case, Xentrace, gprof, xenoprof  or Oprofile. Is it possible to use some vtune