search for: dequantization

Displaying 14 results from an estimated 14 matches for "dequantization".

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2008 Nov 20
4
Dequantizing
I have some data measured with a coarsely-quantized clock. Let's say the real data are q<- sort(rexp(100,.5)) The quantized form is floor(q), so a simple quantile plot of one against the other can be calculated using: plot(q,type="l"); points(floor(q),col="red") which of course shows the characteristic stair-step. I would like to smooth the quantized
2008 Apr 10
2
Delay occurred when the makefile change
I have tried to add a plunging to the "libtheora-1.0beta2" (network bandwidth measuring component was added) and Got it success for some far now the problem is when it is added the encoding process get extremely slow (around 20 seconds delay). I think that the problem is with my modified Makefile (some flag may have missed). the following is my modified Makefile.am which is in the
2008 Apr 23
1
Theora got extreamly slow (Makefile.am was changed)
I have tried to add a plunging to the "libtheora-1.0beta2" (network bandwidth measuring component was added) and Got it success for some far now the problem is when it is added the encoding process get extremely slow (around 20 seconds delay). I think that the problem is with my modified Makefile (some flag may have missed). the following is my modified Makefile.am which is in the
1999 Nov 19
2
Impulses
After playing with the vorbis code for a while and doing tons of hacks and analysis on it, I've found it to perform very poorly with impulse signals. The MDCT seems to cause lots of spreading, and it seems to result in much worse impulse performance then mp3. What is the current plan on handling this? Will a smart quantizer be able to avoid it? I've been looking at various ways of
2006 May 30
2
16 bits, cast on idct function
Hi all, Just a stupid question The IDctSlow function on file idct.c has this line : ip[0] = (ogg_int16_t)((_Gd + _Cd ) >> 0); The ip[0] , _Gd and _Cd are of type ogg_int32_t My question is: The result of (_Gd + _Cd) can be a number with more than 16 bits ? (yes, it can be because they are int32, but the algorithm could guarantee something about that... I dont know...) If
2011 Apr 22
2
Can't compile libtheora vs2010
I'm getting errors like so on initial build of libtheora - 1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\x86_vc\x86stat.c': No such file or directory 1> mmxstate.c (TaskId:16) 1>c1 : fatal error C1083: Cannot open source file: '..\lib\dec\x86_vc\mmxstate.c': No such file or directory 1> mmxloopfilter.c (TaskId:16) 1>c1 : fatal error C1083:
2008 Apr 21
1
Compile libtheora 1.0beta3 with VS2005
Hi all, I tried to compile the theora source with VS2005. But it asked for the ogg library. error message is as follow. **************************************************************************** Error 1 fatal error C1083: Cannot open include file: 'ogg/ogg.h': No such file or directory c:\Documents and Settings\Manoj\Desktop\libtheora-1.0beta3\include\theora\codec.h 64 Error
2007 Oct 09
1
VC6 Patch
Here is a patch that gets the theora_static.dsp project for VC6 building again. Aaron -------------- next part -------------- Index: win32/theora_static.dsp =================================================================== --- win32/theora_static.dsp (revision 13945) +++ win32/theora_static.dsp (working copy) @@ -41,7 +41,7 @@ # PROP Intermediate_Dir "Static_Release" # PROP
2014 May 05
1
Application crushes
Hi all. Can any one please help me with my problem. I wrote an application for Android, using Teorarm. It crushes when I try to play the video file. Native application, compiled with the help of Android NDK 9r in Android Studio. Program stack: #0 theorapackB_readARM () at jni/theorarm/src/dec/bitwise2ARM.s:150 #1 0x673fae80 in oc_dec_headerin (_opb=0x6dca5278, _info=0x6dca52b0,
2011 Apr 05
0
quantize after fdct, _dequant table, and idct
1) What are you doing "mathematically" in a procedure x86/x86enquant: oc_enc_quantize_sse2()? This - the assembler code, and I do not understand mathematically - that's going on there. --- A: 120 121 28 73 -20 -99 -98 -100 123 122 112 108 73 -32 -102 -98 123 123 117 121 100
2013 Jun 19
0
NHW Image codec - lower quality settings
Hello, I have improved a little the NHW codec.I have improved the dequantization in the wavelet HH band, and little improved the -l2 (and lower) quality setting.I have also added a -l3 lower quality setting (-15Ko, exp), I have increased the quantization for this other setting, and I start to remove higher wavelet coefficients, but this is not optimal... The artifacts start to...
2008 Feb 28
1
Multi-thread Theora Decoder
Hi all, Does Theora Community have an interest in a multi-thread decoder implementation? I'm starting to work with multi-thread and I thought that Theora Decoder is a good choice for me, because I had been working with it in a FPGA implementation and I have experience with the library. I'm thinking in working with LoopFilter at first. Do you think I could start with it or there is a
2018 Dec 16
0
Build from Source on MSVC 2017 cl and MSYS2 32 bit
I am build from source on MSVC 2017 cl.exe and MSYS2 32 bit. Environment Machine OS: Windows 10 Prof Visual Studio C++ : 2017 Windows SDK : 10.0.17763.0 MYS2 32 : MSYS_NT-10.0-WOW | uname -m i686 *Building code as below and getting error:* tar xzf libtheora-1.2.0alpha1.tar.gz cd libtheora-1.2.0alpha1; cd libtheora-1.2.0alpha1; CC=cl ./configure --prefix=/d/smallgame/gaminganywhere/deps.posix
2005 Jul 20
1
MMX IDCT for theora-exp
Hello, I'm attaching IDCT MMX patch. I reused IDCT from theora-a3-MMXd.zip. It should work on 64bit X86 platform too. Here is most used functions when playing video with jet aircrafts (gripen) Ogg logical stream 310b2968 is Theora 720x480 29.97 fps video Encoded frame content is 720x480 with 0x0 offset I can play this video with like 200-300 frame drops on Athlon XP 1700+ CPU load (with