search for: dct

This has to do with your own timezone. If I run that code on my computer, both formats are correct. If I do this after Sys.setenv(TZ = "UTC") Then: > cbind(format(dlt), format(dct)) [,1] [,2] [1,] "2016-12-06 21:45:41" "2016-12-06 20:45:41" [2,] "2016-12-06 21:45:42" "2016-12-06 20:45:42" The reason for that, is that dlt has a timezone set, but dct doesn't. To be correct, it only takes the first value &quo...

Why for white-pixel image, oc_enc_fdct8x8_c() returns the matrix with non-zero AC-coefficients? _x[64]: * 107 107 107 107 107 107 107 107 * 107 107 107 107 107 107 107 107 * 107 107 107 107 107 107 107 107 * 107 107 107 107 107 107 107 107 * 107 107 107 107 107 107 107 107 * 107 107 107 107 107 107 107 107 * 107 107 107 107 107 107 10...

...y 18, 2017 at 1:45 PM, Joris Meys <jorismeys at gmail.com> wrote: > This has to do with your own timezone. If I run that code on my computer, both formats are correct. If I do this after > > Sys.setenv(TZ = "UTC") > > Then: > > > cbind(format(dlt), format(dct)) > [,1] [,2] > [1,] "2016-12-06 21:45:41" "2016-12-06 20:45:41" > [2,] "2016-12-06 21:45:42" "2016-12-06 20:45:42" > > The reason for that, is that dlt has a timezone set, but dct doesn't. To be c...

...as promised. This describes the mdct used in my d.m.l patch. I think it is the same as the Lee fast-dct. I typed it in a kind of pseudo-TeX, 'cause the ascii art would kill me. Hope you can read TeX source; if not, ask someone who can to make a .ps/.gif/.whatever of the TeX output, and put it on a webpage or something. I'm to...

Good day! I'm creating HDL IP CORE (for using in FPGA) for theora encoder (now only I-frames). I don't undestand one moment. Now i develop such stages: 1. From RBG(byer) to YCbCr converter 2. DCT processing (8x8 pixels blocks) 3. Quantizator of DCT coeff. 4. Zig-Zag of quantized DCT coeff. and now i have uresolved last stage of compression - how i must send 8x8 blocks to huffman compressor? I don't understand ordering. I must send all DC coeff (Y, than Cb,Cr), after all AC-0 (Y, than Cb...

...quot;, gmtoff = 3600L), + class = c("POSIXlt", "POSIXt"), tzone = c("", "CET", "CEST")) > dlt$sec <- 10000 + 1:10 # almost three hours & uses re-cycling .. > fd <- format(dlt) > stopifnot(length(fd) == 10, identical(fd, format(dct <- as.POSIXct(dlt)))) Error: identical(fd, format(dct <- as.POSIXct(dlt))) is not TRUE Execution halted ... so, of course, the remaining tests aren't done. AFAICT, that test will fail anywhere outside of tzone CET, but I could be missing something. What is the point of this test and is...

...quot;, gmtoff = 3600L), + class = c("POSIXlt", "POSIXt"), tzone = c("", "CET", "CEST")) > dlt$sec <- 10000 + 1:10 # almost three hours & uses re-cycling .. > fd <- format(dlt) > stopifnot(length(fd) == 10, identical(fd, format(dct <- as.POSIXct(dlt)))) Error: identical(fd, format(dct <- as.POSIXct(dlt))) is not TRUE Execution halted ... so, of course, the remaining tests aren't done. AFAICT, that test will fail anywhere outside of tzone CET, but I could be missing something. What is the point of this test and is...

...d configured? Info: Processes: 256 Uptime: 17:01 Memory: 3533.8/14955.3MB Init: Upstart runlevel: 2 Gcc sys: 4.8.4 Client: Shell (bash 4.3.111) inxi: 2.2.28 Time zone: NZST |> c) run the offending code lines "by hand" and show us the values of format(dlt) and format(dct) so we can see what the problem is, something like |> |> dlt <- structure( |> list(sec = 52, min = 59L, hour = 18L, mday = 6L, mon = 11L, year = 116L, |> wday = 2L, yday = 340L, isdst = 0L, zone = "CET", gmtoff = 3600L), |> class = c("POSIXlt&quot...

Looking for the DCT function, but don't see it in the signal pkg. http://rss.acs.unt.edu/Rdoc/library/signal/html/signal.package.html http://rss.acs.unt.edu/Rdoc/library/signal/html/00Index.html As I understand it, the 'signal' functions are ports of the corresponding matlab/octave code, where the DCT exi...

(Disclaimer: this is not an LPC vs. LSP question) After looking at the Vorbis code I was wondering why you were using LSP to quantize the spectral envelope instead of simply quantizing the cepstrum (DCT(log(envelope))) or modified cepstrum (DCT(envelope.^alpha)). To me it seems like when the information is already in the frequency domain, there's no need to go back to LPC. Also, I think a DCT can be faster that a Levinson-Durbin recursion. This is why I'd like to know whether there's a...

...18, 2017 at 1:45 PM, Joris Meys <jorismeys at gmail.com> wrote: > This has to do with your own timezone. If I run that code on my computer, > both formats are correct. If I do this after > > Sys.setenv(TZ = "UTC") > > Then: > > > cbind(format(dlt), format(dct)) > [,1] [,2] > [1,] "2016-12-06 21:45:41" "2016-12-06 20:45:41" > [2,] "2016-12-06 21:45:42" "2016-12-06 20:45:42" > > The reason for that, is that dlt has a timezone set, but dct doesn't. To > be correct, it on...

> I put debug code in a function in C, > but the function oc_enc_fdct8x8() not called. > Why? There is no function oc_enc_fdct8x8. It's a macro, which usually calls a platform-specific version via _enc->opt_vtable.fdct8x8, though on some platforms, it will call a specific version directly (e.g., oc_enc_fdct8x8_x86_64sse2 on x86-64). All of the functions...

...s Meys <jorismeys at gmail.com> wrote: >> This has to do with your own timezone. If I run that code on my computer, both formats are correct. If I do this after >> >> Sys.setenv(TZ = "UTC") >> >> Then: >> >>> cbind(format(dlt), format(dct)) >> [,1] [,2] >> [1,] "2016-12-06 21:45:41" "2016-12-06 20:45:41" >> [2,] "2016-12-06 21:45:42" "2016-12-06 20:45:42" >> >> The reason for that, is that dlt has a timezone set, but dct doe...

Why in the procedure oc_enc_block_transform_quantize() is used function oc_idct8x8()? After all, Inverse DCT only need to decoding stage, rather than coding?

...l.com> wrote: >>> This has to do with your own timezone. If I run that code on my computer, both formats are correct. If I do this after >>> >>> Sys.setenv(TZ = "UTC") >>> >>> Then: >>> >>>> cbind(format(dlt), format(dct)) >>> [,1] [,2] >>> [1,] "2016-12-06 21:45:41" "2016-12-06 20:45:41" >>> [2,] "2016-12-06 21:45:42" "2016-12-06 20:45:42" >>> >>> The reason for that, is that dlt has a timezo...

Dear all, I was wondering whether anyone knows about a program which converts (part of) a data definition file (such as a .dct file for stata, or .sas file for sas) into an R-script. Here is an example with a .sas file: <-- snipp VALUE HTYPE (default=32) 0 = "Not in household" 1 = "Married couple family household" 2 = "Male householder family&q...

Hi, Attached is the first version of the DCT callback. It's still a bit WIP, but now you have something to refer to when I'm rambling :) Best Regards, Thorvald -------------- next part --------------

...To: bens at alum.mit.edu Cc: Reply-All at xiph.org On 18 March 2011 23:15, Benjamin M. Schwartz <bmschwar at fas.harvard.edu>wrote: > On 03/18/2011 01:44 PM, digital design wrote: > > Now i implement next stages of encoder^ > > Block1: > > 1) RGB->YUV > > 2) DCT of 16X16 blocks (pixel format 4:2:0) > > 3) zig-zag in eatch 8*8 block from previous step and push it to bufer > memory. > > > > i push 16X16 blocks to BLOCK1 using raster order (i'm right?) > > Now i'm confused - so much types of ordering. What i must do after DC...

...3.19.0-32-generic x86_64 (64 bit gcc: 4.8.2) > Desktop: KDE Plasma 4.14.2 (Qt 4.8.6) Distro: Linux Mint 17.3 Rosa I suppose that'll do... > Time zone: NZST > > |> c) run the offending code lines "by hand" and show us the values of format(dlt) and format(dct) so we can see what the problem is, something like > |> > |> dlt <- structure( > |> list(sec = 52, min = 59L, hour = 18L, mday = 6L, mon = 11L, year = 116L, > |> wday = 2L, yday = 340L, isdst = 0L, zone = "CET", gmtoff = 3600L), > |> cla...

...uot; time wise currently, I'm happy for |> timezone-portable propositions to change the test. Meantime, anyone who lives where DST happpens in December who wants to get through the remaining tests can avoid this one by changing the line > stopifnot(length(fd) == 10, identical(fd, format(dct <- as.POSIXct(dlt)))) to > stopifnot(length(fd) == 10, identical(fd, format(dct <- as.POSIXlt(dlt)))) ^^^^ (which effectively isn't testing anything much) A less lazy way would be to comment out the relevant lines. |&gt...