similar to: Bad artifacts at 32kbps

I know the focus for Opus is low delay, but I've been watching its development with interest because of the potential for audiobook/podcast use, where latency is practically irrelevant. I hear the upcoming USAC codec will give good results for this niche (though listening test results don't seem to be available to the public yet), but I also hear it'll be extremely patent

A small issue, but missing. Something like this would be helpful: - printf ("celtenc (CELT encoder)\n"); + printf ("celtenc (CELT %s encoder)\n", CELT_VERSION); til

Hi All, I'm looking to package up celt for inclusion in Fedora as the next stable release of ekiga/opal will have support for it. I've run into two issues in compiling it into a rpm. The first is a show stopper, then second one not so much of an issue but thought I'd report it for reference. The first issue is due to the celtdec and celtenc explicitly define rpath. I get the

Hi all, Just found out about this codec and I'm really impressed. I compiled celt-0.5.2.tar.gz on my desktop and tried out a few tests. I then did a native fixed point arm compile on my beagleboard which also worked a treat. Before I get started with the library I was trying to see if I could grab some real time audio, encode it and write to a file using arecord in conjunction with

Hi, To enable stereo in celtenc do I need to change anything other than #define CHANNELS 1 to #define CHANNELS 2 The reason is after I do this the audio sounds distorted. Please let me know if I need to do anything else or whether I need to investigate what's happening at my end further. Paul.

Problems building celt-0.5.2 for blackfin. Use the following to configure: #!/bin/sh # bfinconf # Set up configuration to cross compile on blackfin ./configure \ --host=bfin \ --enable-fixed-point \ CC=bfin-uclinux-gcc \ CFLAGS='-O2 '\ '-mfast-fp '\ '-ffast-math '\ '-Wall -Dlinux '\ '-D__linux__ '\ '-fno-strict-aliasing '\

From: Thorvald Natvig <slicer at users.sourceforge.net> --- celt.pc.in | 2 +- configure.ac | 2 ++ libcelt/Makefile.am | 12 ++++++------ tests/Makefile.am | 2 +- tools/Makefile.am | 4 ++-- 5 files changed, 12 insertions(+), 10 deletions(-) diff --git a/celt.pc.in b/celt.pc.in index 98cc008..67a830b 100644 --- a/celt.pc.in +++ b/celt.pc.in @@ -10,5

Hi, I am running celt 0.11.1 on my mac which is running osx lion. I invoke celt such as so: celtenc original.wav output.oga I do not see any files being encoded, the wave file is stereo 16 bit at 44.1kHz. Any ideas on why this is not working? I also tried the opus git repo for the latest sources, but that also does not produce an encoded file. Thanks -- -baeksanchang -------------- next

On 6/7/14, 1:55 AM, Jean-Marc Valin wrote: > Actually... no! 24-bit can indeed be useful as extra margin and Opus > can actually represent even more dynamic range than 24-bit PCM. That's > not the case for 192 kHz. There's no "margin" that 192 kHz buys you > over 48 kHz. You can do as much linear filtering as you like, the > stuff above 20 kHz isn't going to

Hi, I checked the ODG (Objective Difference Grade) scores for a few reference vectors using the PQEvalAudio Tool and found that some of them show ODG scores as high as -3.5 If we look at the range as described in the link below, it looks unacceptable. http://www-mmsp.ece.mcgill.ca/documents/Software/Packages/AFsp/PQevalAudio.html Am I missing something or are these scores valid? Thanks and

Hi Rhishi, PQevalaudio is very unreliable and buggy. I have compared to PEAQ and - as a result - now I am not using it anymore. With best regards, Christian Hoene Von: opus-bounces at xiph.org [mailto:opus-bounces at xiph.org] Im Auftrag von Rhishikesh Agashe Gesendet: Freitag, 4. Oktober 2013 12:35 An: opus at xiph.org Cc: Rasmi Mishra Betreff: [opus] ODG (Objective Difference

Hello everyone, I'm evaluating the Celt in terms of robustness against bit errors. So what I have done is encoding a wav file using the \tools\celtenc.exe and then manipulated the wav file according a desired bit error rate or burst error length. But the Celt decoder stops decoding with the first bit I manipulated even if this bit is not in the header. So is there a way to do the test

That article is a bit too dismissive. I agree that one cannot hear the difference between 48KHz/16bit and 192KHz/24bit if you just transfer the data directly to the audio output device. As such, there is no good reason for Opus to support higher than 48KHz (especially since this is lossy compression, anyway). However, in general, that's not all you do with audio data. 192KHz is useful for

Is there are description somewhere of how CELT packs into the .oga file? Trying to reverse engineer it from the intertwined celtenc code is suboptimal. -a

Hi, I'm currently testing libcelt (celt-0.9.1) on my Openwrt/Kamikaze RDC-3210 platform and although I'm able to Crosscompile on my Ubuntu 10.10 machine without errors, the resulting celtenc doesn't seem to work properly. Ran ./configure via the Openwrt makefile first (activating fixed-point) ; I first produce a S16_LE Raw PCM file (48Khz, stereo) : test.pcm Then I try to encode

Hi, I'm working on porting libopus and I'd like to get information how to test Opus Encoder properly. There is information in RFC6716, that Opus Decoder's test files (http://opus-codec.org/testvectors/opus_testvectors.tar.gz) were created specifically to exercise all aspects of the decoder. Using these files, a custom implementation of libopus can be verified to be sure the Opus

Hi R users, Someone knows how to replace Infinite value by zero. I have a vector with some Inf value and I want to substitute these values by zero to get the mean of the components of the vector. Any idea? Many thanks, Marlene. [[alternative HTML version deleted]]

How can I use a function with some additional input parameters in constrOptim? For example, something like fr <- function(x,a) { ## Rosenbrock Banana function x1 <- x[1] x2 <- x[2] a * (x2 - x1 * x1)^2 + (1 - x1)^2 } where the optimum is to be found w.r.t. x. Calling optim(c(-1.2,1), fr, NULL, a=100) works as expected, but I fail to provide the a=100 in the constrained case:

Thanks for the answer. I'll take a look at this tool and verify my implementation. But I'd like to clarify the moment. If the following is applied for a test vector Reference Float Point Encoder --> Reference Float Point Decoder --> Float Point Output Reference Fixed Point Encoder --> Reference Float Point Decoder --> Fixed Point Output And then, if Float Point Output and

Dear R-user Suppose I have the following data y=c(2,1,5,8,11,3,1,7,50,21,33,7,60) x=data.frame(y) for(i in 4:nrow(x)) x[i,] =var(x[i-3:i-1,]) I'm trying to get a new variable with the variance of the 3 previous values (just an example) and with NA in the three first positions. I know that my for() is wrong but I'm not able to find my error. Any idea? Thanks, Marlene.