search for: wxy

Dear R Group Here is what i am trying to do.. but couldnt figure out how.. string<-"ABC DEFG HIJKLM NOPQ RSTUV WXY" string1<-substr(string,1,4) I want to create an R object string 2 ( following the logic shown).. R does not allow string subtraction.. any suggestions how to achieve this? string2<-string-string1 (it should now hold "DEFG HIJKLM NOPQ RSTUV WXY" I want to loop this till i...

>I have been giving some thought to how to include Ambisonics in Ogg Vorbis. As I understand it, mapping type = 1 was meant from the start to indicate an Ambisonic stream. The only other information required is the number of channels which thanks to Mr Leese's clever trick tells us exactly which Ambisonic channels are used up to 3rd order. __________________ >The channel coupling

Josh Coalson wrote: > --- smoerk <smoerk@gmx.de> wrote: > >>i didn't find anything about tagging flac files as surround files. i >>think there should some possibility to tell the player how to play a >>multi-channel file (how to map the different channels to the speakers >>or if there some decode is needed, like for ambisonic files). > > > it

...interest in coding 5.1 material with Vorbis esp as tarkin becomes more complete, so I've decided to take a break from pure ambisonic work to look into this. I've decided that the best (from a pure elegance and patent avoidance) way to handle this is to basically decode the 5.1 input into a WXY or WXYUV ambisonic signal, which can then be handled by the Vorbis Ambisonic support. To accomplish that I produced a model of an idealized 5.1 speaker arrangement (with pointsource massless speakers) and a simulated ambisonic microphone at the listening location. I then measured the ambisonic imp...

...interest in coding 5.1 material with Vorbis esp as tarkin becomes more complete, so I've decided to take a break from pure ambisonic work to look into this. I've decided that the best (from a pure elegance and patent avoidance) way to handle this is to basically decode the 5.1 input into a WXY or WXYUV ambisonic signal, which can then be handled by the Vorbis Ambisonic support. To accomplish that I produced a model of an idealized 5.1 speaker arrangement (with pointsource massless speakers) and a simulated ambisonic microphone at the listening location. I then measured the ambisonic imp...

Hi Devs, I am looking at the bug https://bugs.llvm.org/show_bug.cgi?id=43953 and found that following piece of ir %arrayidx = getelementptr inbounds float, float* %Vec0, i64 %idxprom %0 = load float, float* %arrayidx, align 4, !tbaa !2 %arrayidx2 = getelementptr inbounds float, float* %Vec1, i64 %idxprom %1 = load float, float* %arrayidx2, align 4, !tbaa !2 %sub = fsub fast float %0, %1

...more than 256 tracks.) Given that, you might well just be able to add another code for "ambisonic, get 8-bit number of tracks from end of header," and then use the number of tracks to figure out the format. 1 W (kinda dumb way of doing monaural) 2 UHJ (stereo-compatable) 3 WXY (first order without height) 4 WXYZ (first order with height) 5 WXYUV (second order without height) 6 WXYUVW' (second order without height, mixed 1st/2nd order data) 9 WXYZRSTUV (second order with height) 10 WXYZRSTUVW' (second order with height, mixed 1st/2nd order...

...exible universal channel mapping > approach is a VERY bad idea. Just don't call it Ambisonics channel > mapping. There are hybrid formats, how could you describe these with a > simplistic Ambisonics-only channel mapping? I'm thinking of B+ Format > (Ambisonics + Stereo) or maybe WXY(Z) plus a center channel and > optional LFE as a 5.1 alternative. It depends on what your goal is. If you what to accommodate hybrid formats, as OggPCM can do, then things become complicated. If you want a format just for B-Format then life is very much simpler. Up to third order the only me...

...that, you might well just be able to add another code for > "ambisonic, get 8-bit number of tracks from end of header," and then use > the number of tracks to figure out the format. > > 1 W (kinda dumb way of doing monaural) > 2 UHJ (stereo-compatable) > 3 WXY (first order without height) > 4 WXYZ (first order with height) > 5 WXYUV (second order without height) > 6 WXYUVW' (second order without height, mixed 1st/2nd order data) > 9 WXYZRSTUV (second order with height) > 10 WXYZRSTUVW' (second order with he...

...ion as a first cut. 2.) find the subset of points that have more than one neighbour - this is kernel density estimation with a boxcar window of half-width del 3.) perform multinomial sampling on the x values for that subset - ie from (abc)(defg)(hij) select, say, afj, with probabilities (pqr)(stuv)(wxy) Step 2 could be done with a call to outer(), but that would probably be wasteful, especially 'cos it doesn't exploit the ordering of the values. A C program that runs through the sorted values would be quick. As for 3, sample() does multinomial sampling for a single set of p values (as y...

...nnels 180 degrees out of phase with the back channels. (and all are +/-90 degrees out from the LFE channel to boot.) >> > I've decided that the best (from a pure elegance and patent avoidance) >> > way >> > to handle this is to basically decode the 5.1 input into a WXY or WXYUV >> > ambisonic signal, which can then be handled by the Vorbis Ambisonic >> > support. >> >> So U and V are the planar quadupole (m=+/-2) moments? I'm glad to hear >> you can get by with the same number of channels. > >They happen to fit nicely...

...nents of the signal, which give you the 2- or 3-D spatial information. These are the X, Y, and Z signals. (These make up 1st-order Ambisonics, and have the shape of the 'P' orbitals in an atom. If you decode only the W and Y signals through an M/S decoder, you have stereo. If you decode WXY, you have horizontal surround. If you decode all four, you have periphonic surround. Anyway, you get the picture.) The next four signals describe the curvature of the signal (I think -- I don't understand this realm terribly well yet), and have the shape of the 'D' orbitals of an atom...

...gnal, which give you the 2- or 3-D spatial information. These are > the X, Y, and Z signals. (These make up 1st-order Ambisonics, and have the > shape of the 'P' orbitals in an atom. If you decode only the W and Y signals > through an M/S decoder, you have stereo. If you decode WXY, you have > horizontal surround. If you decode all four, you have periphonic surround. > Anyway, you get the picture.) The next four signals describe the curvature > of the signal (I think -- I don't understand this realm terribly well yet), > and have the shape of the 'D'...

>Yesterday I have finished writing the ambisonic pan filter for oggenc. May I ask what this "pan filter" is? I made some tentative suggestions for coupling Ambisonic B-format in a post "Vorbis Ambisonic coupling" on 4feb07 I gather from the last monthly meeting, that some of you, including Monty, had problems with the phase behaviour of B-format. Would anyone like a

OK, I have some basic functionality to support bind variables, it appears to work with the ''old'' %s style too. I''ve altered sanitize_conditions in activerecord/lib/active_record/base.rb to check whether bind variables are in the statement (/\?/). If they are, replace all the ?s to escaped values from the arguments array. else santize and expand. There are a few

Where can I find the Header file or whatever which specifies the "Mapping" flag. In feb - apr 2007, there was a lot of discussion about Ambisonics and Monty kindly stated that Mapping = 1 ; Denotes and Ambisonic file as opposed to = 0 which is 1 speaker/ 1 channel Has this been written explicitly into the standard? Which standard should I be looking at?

...nents of the signal, which give you the 2- or 3-D spatial information. These are the X, Y, and Z signals. (These make up 1st-order Ambisonics, and have the shape of the 'P' orbitals in an atom. If you decode only the W and Y signals through an M/S decoder, you have stereo. If you decode WXY, you have horizontal surround. If you decode all four, you have periphonic surround. Anyway, you get the picture.) The next four signals describe the curvature of the signal (I think -- I don't understand this realm terribly well yet), and have the shape of the 'D' orbitals of an atom...

It obviously would be nice to have such a mode available, for e.g. DVD audio compression. Apparently, the list doesn''t tell me too much about it. My questions are: 1. What is the current status of the 5.1 channel coupling in Vorbis? 2. If I''ll be interested in participation in its development, what is the recommended reading? -------------- next part -------------- An HTML

R-1.7.0 built on NetBSD 1.6, but the validation test suite failed: Machinetype: Intel Pentium III (600 MHz); NetBSD 1.6 (GENERIC) Remote gcc version: gcc (GCC) 3.2.2 Remote g++ version: g++ (GCC) 3.2.2 Configure environment: CC=gcc CXX=g++ LDFLAGS=-Wl,-rpath,/usr/local/lib make[5]: Entering directory `/local/build/R-1.7.0/src/library' >>> Building/Updating

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