Slashdot Mirror
Software Based Echo Cancellation?
"For some more information, my office is trying to get a small system up and running that will allow multiple locations to video conference together. We have some specific requirements and have a fairly good handle on the entire video part of the problem.
However, we are running into problems with parts of our audio mix. The first issue is something that (I believe) is called 'mix minus.' This means that in a group conference, speakers do not have audio sent back to their location. (This is important for various psychology and network latency related issues.) There are several hardware based solutions that are available and we have some software based options.
The larger problem is echo cancellation. As many people may need to speak at once (and to avoid the requirement of having individuals constantly muting their microphones), we would like an echo cancellation component. The ideal would be a software solution that we could run locally, perhaps in conjunction with the same code running on the remote systems. However, most of the solutions we have found are hardware based (DSPs, ASICs, etc.).
The technology used on the studio side as well as the host side will involve various operating systems. We are trying to avoid avoid relying on specific OTC hardware solutions (namely, sound cards) as we would like to be able to create a solution that would function over time, particularly as specific hardware solutions tend quickly to horizon. So, having nice code that could be compiled on different systems would be a plus. Ideally, we would like to minimize the amount of hardware necessary, so an echo cancellation algorithm that could run in conjunction with other processes would be nice, but it is not a requirement."
fp
fp?
Hooray!
a mudvole enters silently.
ffrroosstt ppiissss
5th post
Why is it that slashdot so often fails to close italic tags?
Just wondering.
What we call folk wisdom is often no more than a kind of expedient stupidity.-Edward Abbey
On Batman Beyond...
This scientist had developed an invention that allowed him to block all sound waves, as well as focus their energy. Once he turned evil (and tried to kill Batman), it was a powerful weapon!
But be careful... if you abuse this sort of weapon, you may end up like him with permanent hearing loss, and a desire for vengrance against Batman.
Sär skrivning
Extra pris på godis! Ta en skum tomte, betala för två!
Rök fritt
Sjö nära tomt till salu
Hand tvättas separat
Mörk hårig sjuk sköterska
Ensam stående man söker lägenhet
Antik affär
Alla ovanstående meningar är exempel på särskrivning. Särskrivning är ett problem som plågar svenskaspråklärare i hela den germanska språkvärlden, med ett viktigt undantag: engelskan. Särskrivning är alltså att man skriver sammansatta ord isär. I värsta fall, som i meningarna ovan, kan innebörden av meningarna ändras totalt när man gör sig skyldig till särskrivning. Detta är något språksnobbar både förargar sig över och har hysteriskt roligt åt.
Särskrivning är ett nytt fenomen i modern tid. För 50 år sen såg man nästan aldrig särskrivningar. Det finns många teorier om varför särskrivningen har uppstått. Det första brukar vara påverkan av engelskan. Där ska ord oftast skrivas isär. Men teorin är inte oemotsagd. När man gjorde en undersökning med barn i mellanstadiet fann man att även om särskrivningar var vanligt var det lika vanligt att man skrev ihop ord felaktigt i engelska.
En annan bov skulle kunna vara alla nya elektroniska kommunikationsmetoder. Det är nämligen så att vi som i vanliga fall förlitar oss på datorns rättstavning går på en nit när det gäller särskrivning. Datorn är tyvärr inte tillräckligt smart för att fatta att när man skriver en kontaktannons frågar man inte efter en "mörk hårig kvinna" (den fattar förövrigt inte ens vad du skriver om, i bästa fall kan den känna igen vilket språk du på). Datorn bara ser att du har skrivit "mörk", "hårig" och "kvinna". Alla tre är rättstavade ord i svenskan, därför godkänner den särskrivningen.
Ett liknande problem uppstår när man använder autotextfunktionen* på mobiltelefoner.
Till och med Bellman skrev "brännvins flaska".
Vi som i vanliga fall litar på ordbehandlarens rättstavningsfunktion är också illa ute när det gäller särskrivning. Datorn bryr sig bara om ifall ordet existerar och eftersom båda "mörk" och "hårig" existerar så godkänner den gärna "mörk hårig kvinna", även om det inte är det man menar.
* Om läsaren inte vet vad det är för något ska jag förklara det här: Som bekant delar tre eller fler bokstäver plats på mobiltelefonens "tangentbord". Det gör att man i vanliga fall måsta trycka ner knappen tre gånger för att få fram den tredje bokstaven.
ducks quacks don't echo
Hehe. Someone didn't close thier italics. At least on my screen the whole page from this article down is in italics including the headlines.
Just comment out these two lines in your inetd
#echo stream tcp nowait root internal
#echo dgram udp wait root internal
:) Couldnt' resist. Don't shoot me!
-
ping -f 255.255.255.255 # if only
+1 funny
"I plan to use a global page replacement scheme in my new operating system. In addition, I plan to measure CPU utilization, and when it becomes low enough, I will start up additional processes. What problem can occur? How does my design make it worse? How should I fix this?"
For example, I have a strange problem with my desktop wallpaper. The image is "stretched", but then the part underneath the desktop icons is not stretched, so I have a kind of "visual echo." I think it's Nautilus's fault, but I need to test that hypothesis further.
On this topic, I am looking for a good Gandalf wallpaper image. It should be at least 1024x768 (though 1280 would be welcomed!) and depict Gandalf in a typically stoned state, preferably with pipe. Thanks everyone for your help.
Karma: Good (despite my invention of the Karma: sig)
The link to "meldstar" is a redirect to goatse.cx.
You are a very bad man.
fuckin troll should be shot
Clap Clap Clap
Thats sick. Avoid the link if you don't like unpleasent things.
I wish I could Login. But I'm
at a hotel on my Sega Dreamcasst
web bbrowser. What
do you think of that, cunt?
in reference to that stupid "facts" email that has been passed around via email for years now that says a duck's quack doesn't echo and nobody knows why...
people are so gullible.
There are some odd things afoot now, in the Villa Straylight.
Seth,
Your tiresome method of karma whoring by writing one or two sentences and then quoting from the first Google search result for the article subject is really starting to piss me off. Perhaps psychos like yourself who spend all day surfing Slashdot need to stop harassing successful people like Michael Sims and start working on getting some shred of dignity for themselves, while perhaps in the process actually contributing something to the world aside from stealing and ruining other people's work.
Yeah, it seems to be. I think most of the members so far are college-age kids from Berkeley, Amherst, and some other places, but I'd have to disagree with you saying that the comments aren't insightful or intelligent.
I'm not an expert though, as I just registered only a few days ago. But it's definitely a site to keep an eye on and registering isn't a bad idea either. Just think of how awesome it is to have a UID of only a few thousand here at Slashdot; over at mono, you can get one that's a little less than 1000 IIRC.
You sick fuck.
.357, put it against your forehead and use it to make some lovely patterns on the wall behind you.
Your only solution now is to take a
Sick fucking bastard!
Wow, Seth, how many accounts do you have?
You moderated my comment down within just a minute or two after it was posted. I applaud you on your mudslinging effort against Michael since you work so hard at it, but when I realize how wrong you are about the whole Censorware ordeal and how Michael shouldn't be blamed for any of your mistakes.
I agree. That site sucks even more than /. I hate to admit it, but this site sucks the least among blogs of this genre.
I think it is the nature of the beast. Any blog of this genre will suck because no intelligent, productive people will have the time to dedicate to it.
I agree. Your comment sucks even more than others. I hate to admit it, but your comment sucks the least among comments of this genre.
I think it is the nature of the beast. Any comment of this genre by an AC will suck because no intelligent, productive people will have the time to dedicate to a real, registered account.
Its common knowlidge that Seth is a tyrannical madman who could go postal any minute.....
So sly...
Sig: What REALLY Happened to the Censorware Project
Let me see if I've got this right. You are calling someone else a "sick fucking bastard"?
Are you by any chance a Republican?
This is also known as silence suppression.
well, it wasn't first post for starters - there were a few before me.
But it is a really good question why it is redundant.
I made a statement, I asked a question, no-one agreed/disagreed/answered... Gotta wonder...
Moderators are interesting people...
Jobs? Which jobs?