similar to: opus-codec.org/comparison: Mono or Stereo?

Paul, you may find the following page has more useful/accurate numbers than that diagram: https://wiki.xiph.org/Opus_Recommended_Settings ________________________________ From: opus <opus-bounces at xiph.org> on behalf of Paul Marks <pmarks at google.com> Sent: Thursday, February 13, 2020 6:31:39 PM To: opus at xiph.org <opus at xiph.org> Subject: [opus]

Looking at the Opus comparison page[1], I can't figure out whether the Opus/AAC/Vorbis/MP3 lines are meant to imply a mono or stereo encoding. Could someone please update the caption to clarify this? The single dot for G.711 is clearly mono, but for stereo music, are the codecs at the top meant to converge near 128 kbps, or 256 kbps? [1] http://opus-codec.org/comparison/

Thanks for the input! --Albin On Sat, May 12, 2018 at 6:00 PM, Orestes Zoupanos <oresteszoupanos at hotmail.com> wrote: > Hi Albin! > > There may be some details at: https://tools.ietf.org/html/rfc7845#section-6 > > Otherwise, I hope someone else on this list might be able to give a better > formula for estimating packet size. > > Regards, > > Orestes >

Hello, I'm working on an Opus encoder block for GNUradio (a signal processing toolkit). I was wondering if there's some formula/heuristic for estimating the packet size average case / worst case given a certain encoder setting (assuming VBR). I need to provided a reasonable estimate to the GNUradio memory allocator. --Albin

Note also that the packet size you give the encoder also acts as an absolute max on the bitrate. For example, if you ask for 32 kb/s VBR but give a max packet size of 120 bytes, then you're absolutely certain the bitrate will never go over 48 kb/s. Jean-Marc On 05/12/2018 12:42 PM, Albin Stigö wrote: > Just a follow up... I guess I was a bit confused about the VBR > setting. I realise

Hi, folks, I have an old CELT thing that I'm updating to Opus and I'm trying to get individual pieces upgraded.  My first task is upgrading the CELT encoder to Opus. The old CELT thing treated the L and R channels as independent mono streams, encoded them somehow with CELT to form one bitstream, sent one bitstream across, and then unpacked it manually after the decoder. Can I do that

Hi all, New pre-release here is at: http://mega-nerd.com/tmp/flac-1.3.2pre3-win.zip http://mega-nerd.com/tmp/flac-1.3.2pre3.tar.xz Changes: * Fix tests with Makefile.lite build system. * Fixes for non-Intel CPUs. MD5 and SHA256 sums: > md5sum flac-1.3.2pre3* 61aa8597a220303daf4beb2b8756979d flac-1.3.2pre3.tar.xz 8b470ceac02340600db73bc6daea4fc7 flac-1.3.2pre3-win.zip

Jean-Mark sarkasm. Jean-Markasm. (Bonus points for providing an actual noisy WAV! ^_^) On 30/10/2017 20:28, Jean-Marc Valin wrote: Hi, Before I comment on the graphics you posted to visualize the difference between two audio signals, I'd like to ask for your help in evaluating my JPEG encoder. I've encoded an image with JPEG and then computed the difference with the original. I then

I'm one of the co-admins of the Facebook page for FLAC. 15 hours ago, I posted a message giving a vague "heads up" that a new release is on the way. Since then there have been 3 shares, 6 comments, 128 likes and 4451 people reached. That's slightly more than the page's audience. That's more than what the previous release announcement (from November 2014) got. -- -Dec.

Hello, I've been using Opus on an STM32 M4 platform for speech coding in mono mode. I thought I'd try stereo for grins to see if I can handle the CPU load, and I'm getting a return code of -1 from opus_decode_float (using CBR and 40ms frames). I decided to try the opusenc and opusdec tools to just see how the command line apps would behave. I am getting decoded audio, but I am

Crew, I've run into something a little odd with the vorbis encoder and would like some input. I use SpacialAudio's SAM3 Broadcaster and am having problems with the ogg encoder when I create a mono output stream. It seems as if the signal level of the left and right sides are being combined before the encoding process, leaving the sound muddy and overdriven. As such, if I reduce

Hi, Does Celt (in particular version 0.7.1) exploits correlation between the two channels in stereo mode? In practice, is it possible to use the two channels as two mono signals without affecting quality? Thanks Best Regards Riccardo Riccardo Micci Senior DSP Engineer, Wireless Group Cambridge Consultants Science Park, Milton Road Cambridge, CB4 0DW, England Switchboard: +44 (0)1223

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello For some reasons, I need to encode in mono a stereo wave file, as with the --downmix option from oggenc. I searched in speexenc man page and in the on line documentation, unsuccessfully. Of course I could first use something like sox to down mix my file, but it would be more practical to have an option directly in speexenc. - -- RIQUER

Sorry for the questions out of the mail list's subject. 1) Could you help me with getting information on how can I convert multichannecl (e.g. 5.1) non-encoded (PCM) data into mono\stereo? I suppose this performed in the manner like: Left = x1*(Front Left)+x2*(Back Left).... But is there exist commonly used standards to perform this task? 2) It seems FLAC pjoject have been frozen for some

Hi, If I want to encode two audio channels that are not related, audio from two different sources not stereo, is it best to create two instances of a single channel encoder or use one encoder with two channels? thank you, Paul.

Hi Matěj, I had a look at your files and it seems like the issue is that the speech/music detector thinks that some segments are speech rather than music and at low bitrates SILK tends to significantly narrow the stereo image. We're planning on adding an option to opusenc to force it to treat the input as speech/music. Just to confirm that's the issue, can you try encoding with the

Hello, I'm not a programmer or Opus developer but I tried to test the sound quality of a music file (Nick Warren - Devil's Elbow, freely available from the author's Soundcloud account) encoded with libopus 1.2 RC1. I used Windows binaries from free-codecs.com. I noticed that in the case of my selected music file (which is generally harsh on lossy codecs as it's necessary to

Hello all, I can't get stereo with wineasio, even the new verison of wineasio which I have compiled > 1.7.4. when I open an app with wine, I do see the connections in Qjack connections, but It is not in stereo Ardour can verify this, and both left and right connection are connected from wine to jack, I have googled for this answer to no aval and I have asked numerious times on IRC in

I just have a quick question. While looking through what documentation i could find for oggenc, i was unable to figure out if a mono stream is automatically detected and encoded properly. I have several audiobook-type waves to be converted, and i just need to figure this out so i can delete the huge .wavs off of my disk. Thanks PS Is rc4 just around the corner (with rumored improved support at

We have a customer who wants us to record anywhere from 2-4 participants on a call in stereo (as opposed to mono) quality audio. Some background.. We are using asterisk 16.6.1 We are also currently using AMI/AsyncAGI and ConfBridge to bring the parties together. I believe recording in the various file formats (based on extension), it's always recording in mono quality. My one thought is to