search for: artefact

Dear R-Users, my dataset contains timeseries that are structured into task-specific epochs as labelled by a factor and a boolean variable for labelling each data-point within the series as artefact or non-artefact. Now there's no problem in addressing continuous task-specific time-series that are free from artefacts as long as artefacts extend to either boundary of adjacent timeseries but how can I individually select e.g. two time-series within each task, if valid, i.e. artefact-free da...

...eeing that Ogg Vorbis got last place in my ranking. Not only that, but it even was ranked 2nd place by the other people in average. (Though that doesn't mean too much seeing that many people couldn't even pick out the uncompressed wav.) So what made me rank it that bad? I noticed strange artefacts in the entire Ogg Vorbis encoded sample already when I got through the list the first time. But when I listened to it with headphones the artefacts got really *inacceptable*. I don't know how to describe them, maybe echoing or bubbling. They made me rank MP3 and Real even better than Ogg V...

http://bugs.freedesktop.org/show_bug.cgi?id=25275 Summary: [NV30] Graphical artefacts on PPC64 Product: xorg Version: 7.4 Platform: PowerPC OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: Driver/nouveau AssignedTo: nouveau at lists.freedesktop.org Report...

Dear all, I encoded and decoded some files using speex codec and I find out with than when using the original raw file and coding it in NB with different bit rate, complexity or with/without enhancement some kind of slight artefact (a strange low level sound appears) is created at t=1.12 s. This is just before an attack which is present in the signal. I did not try to solve the problems but if someone has time to check what is going on it would be helpful. The original and the decoded (NB at 8 kbit/s with enh on) file are in...

https://bugs.freedesktop.org/show_bug.cgi?id=30286 Summary: Rendering Artefacts for "EffectFrames" with KWin trunk Product: Mesa Version: unspecified Platform: Other OS/Version: All Status: NEW Severity: normal Priority: medium Component: Drivers/DRI/nouveau AssignedTo: nouveau...

Hi guys, as MP3 and Opus have very similar objectives, I think the original poster's question was a valid one: Why does Opus have more artefacts in the lower frequency ranges than MP3 has? The spontaneous suspect that lower frequency artefacts may be more noticeably than higher frequency artefacts seems plausible, also. Is it a matter of energy (which is higher for higher frequencies)? When your own ears are no longer in their best possibl...

Hello. Me again. Have you tried to encode piano solo? Noticed high bitrate Opus gave? And there's also artefact at 15kHz which wasn't in the original audio. Visible with Spek program. Download FLAC and Opus both files, new link: http://www.filedropper.com/example_3 FLAC full: 1084 kbps; FLAC solo: 465 kbps. with --bitrate 160: Opus full: 158 kbps; Opus solo: 190 kbps. Included also Spek spectrogram PNG f...

http://bugs.freedesktop.org/show_bug.cgi?id=26057 Summary: Artefacts in kde 4 Product: xorg Version: 7.4 Platform: Other OS/Version: All Status: NEW Severity: normal Priority: medium Component: Driver/nouveau AssignedTo: nouveau at lists.freedesktop.org ReportedBy: alex...

...tio and of course because it is open source. You DSP guys would probably curse us if you saw what kind of ugly things we do to compressed audio flows. One of them being: violently switching a flow from one machine to another. I guess it is not a nice thing to do and it ends up with weird audio artefacts sounding a bit like a submarine ping usually. (By the way, we have really good genuine reasons to want to do that :-) To be honest I have not yet much of a clue on how speex works, so anyone stop me right away if I say something stupid. The encoder/decoder are based on linear prediction and t...

https://bugs.freedesktop.org/show_bug.cgi?id=105173 Nick Lee <nvlbox at gmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- QA Contact| |xorg-team at lists.x.org Component|General |Driver/nouveau Version|XOrg git

Dear R user, I have made many logistic regression (glm function) with a second order polynomial formula on a data set containing 440 observation of 96 variables. I?ve made the plot of AIC versus the frequency (presence/observations) of each variable and I obtain a nearly perfect arch effect with a symmetric axe for a frequency of 0.5 . I obtain the same effect with deterministic data. Maybe

Hi, I'm bitten by a bug that is also in the Debian BTS, so I'm not sure you are aware of it. I couldn't find it in the fdo BTS. Anyway the problem is simple. After a successful suspend and resume all window decorations (the places where the shadow was supposed to be, but also the titlebars) are much to colorful (meaning it has some random colors in it). Moving the windows brings the

Hello, everybody I run the following program, and depending on the size of eps I get different results. With eps=1e-05, the program calculates wrong values for x=65:67 and others. The program runs fine with eps=1e-07. Why is this so? Also, I am using area() instead of integrate() because I cannot make integrate to work, especially with imaginary numbers. Maybe someone can show me how to use

https://bugs.freedesktop.org/show_bug.cgi?id=91247 Bug ID: 91247 Summary: Tomb Raider: Underworld renders lots of artefacts on models and objects Product: Mesa Version: git Hardware: Other OS: All Status: NEW Severity: normal Priority: medium Component: Drivers/DRI/nouveau Assignee: nouveau at lists.fr...

...ular, to benefit from unit tests, and to declare dependencies properly). I would then need to a) uncompress my R package, b) somehow, ensure my dependencies are installed, and c) call runApp(). This can get tedious, fast. Other languages let the developer package their code in "runnable" artefacts, and let the developer specify the main entry point. The mechanics depend on the language but are remarkably similar, and suggest a way to implement this in R. Through declarations in some file, the developer can often specify dependencies and declare where the program?s "main" function...

...ixed-point ?disable-float-api && make) using the following command: ./opus_demo voip 16000 1 23000 sweep_in.raw sweep_out.raw Where sweep_in.raw is a 30 seconds full scale frequency sweep from 0 to 8kHz sampled at 16kHz. The first 6 seconds of audio after transcoding sound Ok. After that artefacts are introduced all the way to the end of the file. The floating point version does not have the issue (even though the quality is subjectively worse roughly from the same point). I believe I narrowed down the problem to the file burg_modified_FIX.c ? if I make sure the input signal is scaled down...

Hi Everyone, I just merged a lot of changes in the CELT master branch. This should solve the following issues: - tonal artefacts (birdies) at low bit-rate - tonal artefacts in stereo at all rates - low-frequency noise (roughness) on low bit-rate speech The code has been simplified a lot, but there's lots of changes, so please give this a try and see if anything got broken. Cheers, Jean-Marc

On 10/31/2017 07:08 PM, Ulrich Windl wrote: > as MP3 and Opus have very similar objectives, I think the original poster's > question was a valid one: Why does Opus have more artefacts in the lower > frequency ranges than MP3 has? I'm not sure, but my best guess would be "because MP3's window is very leaky and MP3 has to waste a lot of bits in the LF because of that". It could also be just the MP3 encoder being silly, or other things. Most logical explanati...

Hi all, installed the old space shooter Swarm and it is running fine pleased to say except artefacts of lasers and rockets that have been fired staying on screen for up to another 6 seconds. This is as you can imagine a bit irritating as they move with and stay on the screen. Wine x.19. Have set the game to 'unmanaged' by the window manager as was suggested here in another thread, but th...

...well. Of course, this requires Docker to be installed, but if that's a problem, probably better to "ship" the app as a web application and share a URL with the user, eg backed by shinyproxy.io > > Other languages let the developer package their code in "runnable" > artefacts, and let the developer specify the main entry point. The > mechanics depend on the language but are remarkably similar, and suggest a > way to implement this in R. Through declarations in some file, the > developer can often specify dependencies and declare where the program?s > "...