similar to: Qyery on bark equation in floor0 code

Hi, In the course of some work which I describe below, I have found a very significant difference between the BARK function described in the Vorbis specification and its implementation in libvorbis. In the specificationhttp://xiph.org/vorbis/doc/Vorbis_I_spec.pdf bark(x) = 13.1arctan(.00074x) + 2.24arctan(.0000000185x**2 + .0001x) In the libvorbis code

Could someone point me to the BARK/MEL tables that these macros (from vorbis/scales.h) are trying to approximate? #define toBARK(f) (13.1*atan(.00074*(f))+2.24*atan((f)*(f)*1.85e-8)+1e-4*(f)) #define fromBARK(z) (102.*(z)-2.*pow(z,2.)+.4*pow(z,3)+pow(1.46,z)-1.) #define toMEL(f) (log(1.+(f)*.001)*1442.695) #define fromMEL(m) (1000.*exp((m)/1442.695)-1000.) I was wondering if I could come

I have a small feature request for oggenc: Can a command line option be added to allow the user to set the first serial number to be used for the output ogg stream? This only takes a few lines of code, actually. Rationale: it is quite helpful for debugging other encoders. If oggenc is the "reference" encoder, ensuring that your new whiz-bang encoder has diffable output to oggenc is a

Hi, I need another clarification regarding the standard. In floor0 header decode (setup), the point no.7 says that if any of [floor0_order], [floor0_rate], [floor0_bark_map_size], floor0_amplitude_bits], [floor0_amplitude_offset] or [floor0_number_of_books] are less than zero, the stream is not decodable But as we see, all those values are read as unsigned integers. Now I'm not able to

Hi, In case if I come up with my own implementation of the vorbis code, what is the way to certify the same ? Is there any conformance testing as in the case of MP3 ?? If so, who will be certifying the same ? Best regards, Nags.. Confidentiality Notice The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the

We've made a little change that changed the output of vorbis is there a way to check the accuracy of the output against the original output? I also asked this question in the irc ... Thanks, Tal.

Do anybody know, from where I can get an Ogg Vorbis File, which uses floor0 coding. I know that the current encoder doesn't use floor0. Anyway, to be fully compliant with the Vorbis Specification the decoder still must be able to decode floor0. I am working on a Vorbis port to a DSP. I want to go sure, that if the need of floor0 decoding will again occur, this also will work properly.

Hello, It seems there is an error in the algorithm for floor0 decode in section 6.2.2 of the Vorbis specification. Here's the relevant part: 3 3) [coefficients] is an empty, zero length vector 4 4) [booknumber] = read an unsigned integer of ilog( [floor0_number_of_books] ) bits 5 5) if ( [booknumber] is greater than the highest number decode codebook ) then

Hi, I think that the introduction of the lsp_look lookup array isn't ideal and found a better change that can be applied. in floor0_map_lazy_init() you can replace look->linearmap[W][j]=val; by look->linearmap[W][j]=vorbis_coslook(M_PI*val/look->ln); and in vorbis_lsp_to_curve you then replace float w=vorbis_coslook(wdel*k); ... }while(map[i]==k); by float w=map[i]; ...

Hello I'm working on a fix-point decoder for AOS/Bluebottle - the proprietary OS of ETH Zurich. I've some problems with Floor0-curve-computation: I don't know what the little omega [cos(w)] stands for, line 3 of the official Vorbis documentation. Does anybody knows what this value means? I've tried to get the answer from the jOrbis and Tremor, but both seem to do - among

Hi, It is better to replace this line in function filterbank_new: max_mel = toBARK(EXTRACT16(MULT16_16_Q15(QCONST16(.5f,15),sampling))); to max_mel = toBARK(EXTRACT16(sampling/2)); It gives the same but it seems to be faster and avoids overflow on 44100 kHz that prevents denoiser to process 44100 streams. (Yes I know that Speex should not pack 44100 streams but it does now and I use it). Best

The following has been committed to the Vorbis I spec as of r19445: Errata 20150226: Single entry codebooks A ?single-entry codebook? is a codebook with one active codeword entry. A single-entry codebook may be either a fully populated codebook with only one declared entry, or a sparse codebook with only one entry marked used. The Vorbis I spec provides no means to specify a codeword length of

Hi, the idea of a dragon theme reminded me of the dragon-like serpents called "Nāga" from Cambodian mythology, among other places. Here's a brief link explaining the specific Cambodian meaning - http://en.wikipedia.org/wiki/Naga_(mythology)#N.C4.81gas_in_Cambodia I like this as a name, because it's unique short and easy to type and remember (as long as you omit the accent,

Hi there ! I'm kinda "yet another guy who tries to implement a vorbis decoder from scratch only by using the vorbis spec". (pure Java, OO-style) (I downloaded the long-awaited-all-in-one-PDF) The data structures are quite ready, I can successfully load the codec setup packet and all its components it's containing. <p><p>So far so good.... Here's my first note

Hi, There is a question that I am confused. I have a set of data like this: hsa-miR-205--GATA3 0.797882767 1.08E-13 hsa-miR-205--ITGB4 0.750217593 1.85E-11 hsa-miR-187--PGF 0.797604155 3.24E-11 hsa-miR-205--SERPINB5 0.744124886 3.28E-11 hsa-miR-205--PBX1 0.734487224 7.89E-11 hsa-miR-205--MCC 0.72499934 1.80E-10 hsa-miR-205--WNT5B 0.717705259 3.33E-10 hsa-miR-200c--PKN2 0.721746815

Hello, everybody. I am looking for same Ogg Vorbis file which have 8192 size frame or using floor0. According to the Ogg Vorbis spec, the maximum frame size is 8192. But I cannot find that size of frame in the Ogg Vorbis file. Also I cannot find Ogg Vorbis file using floor0. If you have, pleas open them. Or can you tell me where I can find them? Sincerely. Eunjik --- >8 ---- List

Hi All, I am planning to implement Ogg Vorbis Decoder on a 24 bit DSP. I have following doubts: 1) What is min and max bitrate? 2)What is max Audio Packet size ? 3)What is the max size of setup header? 4)Any idea how to start for making a 24Bit fixed point reference code? Shall I start with floating point or Tremor or Tremor Low Mem Version? 5) What window sizes in Ogg Vorbis are normally

Hello to everyone! During building speex library for Symbian OS I encountered some problems. All thess problems can be solved by modifying the speex sources. I don't have access to SVN repository of speex, so I will just describe the changes to be done: 1) mmp file in symbian derictory misses windows.c sources. You need to add this string into speex.mmp: SOURCES windows.c 2) Symbian OS

On 2024-09-05 4:23 p.m., Leo Mada via R-help wrote: > Dear R Users, > > Is this desired behaviour? > I presume it's a bug. > > atan(1i) > # 0+Infi > > tan(atan(1i)) > # 0+1i > > atan(1i) / 5 > # NaN+Infi There's no need to involve atan() and tan() in this: > (0+Inf*1i)/5 [1] NaN+Infi Why do you think this is a bug? Duncan Murdoch

Dear all, I try to plot a logstic regression model as follows: Valkror<- read.table("Valkror.txt", header=T) np.bark<- glm(Npinc~bark, family=binomial, data=Valkror) plot.formula(np.bark$fitted.values~ Valkror$bark) The above looks nice but I want to connect the points with a line so I try: plot.formula(np.bark$fitted.values~ Valkror$bark, type="b") but it gives a