similar to: [1.1.1] Too much quantization on flat red surfaces

Hello all, I've been working a little inside the Theora decoder when I found that it seems that many videos had the very same huffman tables encoded into their bitstreams (at least the ones that I could take my time to dissecate). I found that the tables are listed as TH_VP31_HUFF_CODES in the file huffenc.c. I tried to investigate a little bit more to see who was setting the bitstream

library(rgdal) my_asc=dir("~/Pulpit/dods/karol/TVDI 113_121",pattern=".asc",recursive=T,full.names=T) for (i in 1:length(my_asc)) { r <- readGDAL(my_asc[i]) z <- as.matrix(r) vectordata[i] <- mean(z) vectordatamax[i] <- max(z) vectordatamin[i] <- min(z) vectordev[i] <- sd(z,na.rm=True) hist(z)

I am currently looking at putting together an Asterisk PBX system for my home office. One of the things I need is an expandable 2-line corded/cordless phone system. If I wasn't using Asterisk, I'd be getting one of these AT&T systems with 2 extra handsets. http://telephones.att.com/attui/shop/product_detail.cfm?itemID=ad53fe08-495e-41b6-b390-3aaa1c84cc40 So, the question is,

M. Pabis wrote: > If the multithreading encoding was dropped out, may I ask why? IIRC, the commits from 2007 only threaded the motion search, and gave gains of only 10 to 20%. However, as part of the work to improve the Theora encoder quality for the HTML5 video tag, the way this search was done was completely rewritten, and we got significantly more than 10 to 20% speed-ups just by having

I know this is OT but I didn't read about it anywhere else and I don't miss much so thought this may be of interest to other people on this list. http://www.pbs.org/cringely/pulpit/pulpit20050728.html Cheers, Dean -------------- next part -------------- An HTML attachment was scrubbed... URL:

Robert Cringely had an interesting item in his 2004 predictions: 12) Wal-Mart's entry into the music download business changes everything, and will undoubtedly take the leadership away from Apple. This wouldn't bother Apple if Wal-Mart would support its file standards so Wal-Mart music can play on iPods, but that won't happen. In order to compete for what really counts (iPod

http://www.pbs.org/cringely/pulpit/pulpit20050512.html interesting comment this week about the Xbox - any intelligent thoughts here? I know the price point puts it above most users Asterisk outlay (I run mine on a $100 P3 -800) But interesting to see what happens if people start running video conferencing etc on their home asterisk servers, and lets face it where else can you buy this

Hi, thanks for some On Wed, Feb 4, 2015 at 5:17 AM, Timothy B. Terriberry <tterribe at vt.edu> wrote: I don't believe anyone has been working on this for some years. There are > two basic approaches. > > One is threading within a single frame, which does not require any API > behavior changes. In theory you can scale to a fairly decent number of > threads everywhere

Hi all, I'd like to quantize a variable to map it into a limited set of integers for use with a colormap. "image" and filled.contour" do this mapping inside somewhere, but I'd like to choose the colors for plotting a set of polygons. Is there a pre-existing function that does something like this well? i.e., is capable of using 'breaks'?

Hi Jonathan. I really, really hate to bring this up this late in the game, but I just noticed that your NEON code doesn't use any of the "high" intrinsics for ARM64, e.g. instead of: int32x4_t coef1 = vmovl_s16(vget_high_s16(coef16)); you could use: int32x4_t coef1 = vmovl_high_s16(coef16); and instead of: int64x2_t b1 = vmlal_s32(b0, vget_high_s32(a0), vget_high_s32(coef0));

Hi, I'm studying at ETH Zurich and want to use a pyramid vector quantization for my semester thesis. Unfortunately, I have some troubles with generating the codebooks for high dimensions. For vectors with dimension bigger than 12 it takes such a long computation time to generate. I thought maybe you could help me out with a efficient way to do this? Is there some code available? Thanks for

Hi I am a student and working on Speech Coding and Speex. I just want to know where to get the document describing subvector quantization of innovation. Is there any document which can help me know how C code works or any paper exactly explainin the idea? regards Faisal __________________________________ Do you Yahoo!? Friends. Fun. Try the all-new Yahoo! Messenger.

Dear Stefan, In the paper "Improved Forward-Adaptive Prediction for MPEG-4 Audio Lossless Coding", a non-linear compander is applied to the parcor coefficients prior to quantization. This compander is designed in order to minimize quantization error, especially for magnitudes close to unity. If you determine the typical distribution of magnitudes of the LPC coefficients, you could

Hello everybody, my name is Francesco, I am an italian student graduating in physics. I'm studing the Theora video codec and making some comparative tests. Unfortunately i'm not able to find some informations that could be useful. If someone could make clear some concepts, (or tell me where i can find these informations), i'll be very happy. ( I've yet read the Theora Format

Hello, I have improved quality for -l1->-l4 settings.I have properly set up the wavelet coeff threshold of the dead-zone according to the different wavelet subbands, I have then saved another 1Ko per .nhw files without noticeable difference and so I have raised again the quantization.The reconstructed images have now a better precision and still a good neatness. Update at:

Hi. I have been talking with Psytel MPEG-4 AAC developer (www.psytel.com) about various compression formats, and to make it short he said that one of the main drawbacks of Vorbis is its vector quantization - it introduces more error then other quantization methods (like non-uniform scalar quantization, if I got it right), probably used in AAC and other similar codecs. I know vector quantization

Hello, Really hope that I am not disturbing you, but for those interested, I have improved quantization in NHW, and so now it is visually better, with a better balance between neatness and precision. As it is a small modification and correction, I did not release a new version but I have updated the binaries. More at: http://nhwcodec.blogspot.com/ I know I am publishing a lot of incremental

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

> On Dec 19, 2015, at 10:07 PM, Timothy B. Terriberry <tterribe at xiph.org> wrote: > > Jonathan Lennox wrote: >> +opus_int32 silk_noise_shape_quantizer_short_prediction_neon(const opus_int32 *buf32, const opus_int32 *coef32) >> +{ >> + int32x4_t coef0 = vld1q_s32(coef32); >> + int32x4_t coef1 = vld1q_s32(coef32 + 4); >> + int32x4_t coef2 =

On Nov 23, 2015, at 12:04 PM, John Ridges <jridges at masque.com<mailto:jridges at masque.com>> wrote: Hi Jonathan. I really, really hate to bring this up this late in the game, but I just noticed that your NEON code doesn't use any of the "high" intrinsics for ARM64, e.g. instead of: int32x4_t coef1 = vmovl_s16(vget_high_s16(coef16)); you could use: int32x4_t coef1