This directory contains the Video Quality Experts Group (VQEG) raw test sequences in YUV 4:2:2 format. See Readme.txt for details.
Created: 28/03/2008
by Maxim SmirnovMore...
MSU Video Group MPEG-4 AVC/H.264 Video Codec Comparison '2007 including MainConcept H.264, Intel H.264, x264 codecs and others. All the codecs are assessed by objective quality measures and speed for three usage areas: "Video Conferences", "Movies", "HDTV". The overall ranking is also computed. There is a free short version intended for companies and advanced users.
Created: 29/01/2008
by Maxim SmirnovMore...
Benchmark of over 200 archivers on the world's largest testsets; also features benchmarks on .jpg, .mpg, .pdf, .mp3, .mp4, .mov, .wmv, .rm, Installer packages and other hard-to-compress files; includes the "Ten Commandments of Compression", reports best performances by year and by file format, etc.
Created: 31/01/2007
More...
The main goal of the performed comparison is getting answers on the following questions regarding lossless video codecs:
What codec or codecs are best for video capture and video editing applications?
What codec or codecs achieve the best compression ratio?
What advantages multithreading gives to modern codecs supporting it?
Only absolutely lossless codecs were studied in this comparison. Only progressive test video sequences were used.
Was tested folowing codecs:
The contest is about compressing the human world knowledge as well as possible. The intention of this prize is to encourage development of intelligent compressors/programs. The goal is to compress the first 100MB of Wikipedia better than your predecessors. The total prize is about 50'000€.
Created: 23/12/2006
by Maxim SmirnovMore...
WMPhoto is a new format for image compression that is said to have better quality/compression ratio than that of current standards, including JPEG 2000. The main goal of this testing was the verification of superiority of WMPhoto by comparing it against nine JPEG 2000 codecs from last year's JPEG 2000 Image Codecs Comparison.
Created: 21/10/2006
by Dmitriy VatolinMore...
There exist various benchmarking-corpora for compressors in the internet, used by most of the researchers in the field of data-compression. But they mostly publish their results in the papers only.
This makes it hard - for both: professionals and amateurs - to compare their results and verify effectivity against those of others, also because they are mostly not aware of their existance.
So these are some reasons that lead to the creation of this centralized repository of results for any kind of compression over a broad range of well known and accepted as well as some experimental and personal corpora.
Created: 04/10/2006
by Niels FröhlingMore...
The main task was to comparatively evaluate quality of MPEG-2 decoders while decoding distorted streams. This question is topical for satellite broadcasting and, to a lesser degree, for DVD video playback.
Tested decoders:
The main quality parameter of codec is the subjective impressions of viewer during compressed video playback. So the main idea of subjective comparison methods is to evaluate visual quality of compressed sequences as the average opinion of experts (MOS, Mean Opinion Score).
During this comparison the following codecs were tested:
DivX 6.0
Xvid 1.1.0
x264
WMV 9.0
Bitrates:
690 kbps
1024 kbps
Number of sequences: 4
Number of experts: 50
Created: 07/03/2006
by Dmitriy VatolinMore...
The test was updated in Feb. 2005. It shows compression ratio, encoding and decoding speed of basic lossless audio compressors available for Windows.
Created: 11/02/2006
by Maxim SmirnovMore...
This comparison, dated back to 2003, show the main characteristics, including compression ratio, support level, licence type, speed, of several popular lossless audio codecs.
Created: 11/02/2006
by Maxim SmirnovMore...
National Software Testing Labs (NSTL), employed by Microsoft, ran a proctored double-blind test that compared 64 kilobits per second (Kbps) WMA Pro (stereo) to the High Efficiency AAC Profile (HE AAC). The 12 segments of audio were presented by a proctor in a double-blind test to 300 individual listeners of both sexes and over a wide variety of ages. The paper states that 37% of the listeners preferred WMA Pro, 34% expressed identical preferences, and 29% preferred HE AAC.
Created: 31/01/2006
by Maxim SmirnovMore...
The page contains comparative tables on general and technical information for a variety of audio codecs. There also links to some comparative tests.
Created: 30/01/2006
by Maxim SmirnovMore...
This site reports the results of benchmarks to
compare the latest state-of-the-art command line compressors with only
one focus: ultimate size reduction. Has a nice list of compressors and their web pages. Also contains lossless audio compressors comparison.
Created: 25/04/2004
by Mark NelsonMore...
Comparison of 7 H.264 codecs with DivX6. All H.264 codecs were kindly provided by the codecs developers. # Total number of graphs in this comparison is 3796. Only 82 (2%) of them are in document;
# The number of computer-days is more than 20;
# Final document has 85 pages.
Created: 20/12/2005
by Dmitriy VatolinMore...
A comparison of various lossy audio compression schemes. Panos Stokas provides his take on the whole situation, and includes tons of links to files, articles, and more food for thought. Most readers seem to like this web page, but one reader had this negative comment: This website is patently and fatally flawed to the nth degree. Nothing but misconception and conjecture with no real basis in scientific analysis. Very misleading to the uneducated in audio compression.. Another reader says Just reading "However, we have not found a single implementation that did not produce serious amounts of distortion in our testing sample. Nobody seems interested any longer." about AAC of all things, makes it apparent that this guy has no idea what he's talking about or what he's doing.
Created: 19/11/1999
by Mark NelsonMore...
MSU VideoGroup have tested 9 main JPEG 2000 codecs with PSNR and visually to find a leader. All of them are better then JPEG, but there is some difference between them!
Were tested:
* JASPER 1.701.0
* ACDSee 7.0
* Leadtools JPEG 2000 Photoshop plug-in 1.0
* Morgan JPEG 2000 toolbox 1.2 rev 0.0
* Lurawave 2.1.10.04
* Kdu_compress 4.5.2
* JPEG 2000 Compressor (Anything 3D) 1.00.000
* Elecard Wavelet 3.0 Beta
* Photoshop CS2 ‘native’ plug-in 1.6
Created: 28/09/2005
by Dmitriy VatolinMore...
A site devoted to listing all known lossless audio compression algorithms and software. It is not maintained since 2003.
Created: 10/12/2000
by Mark NelsonMore...
Comparison of more than 30 video codecs on several sequences and with different parameters (Fedruary 2003).
Created: 18/07/2005
by Dmitriy KulikovMore...
The newest versions of MPEG-4 codecs comparison for their using by an ordinary
user for home video compression. Also shown the evolution of the DivX codec.
Created: 18/07/2005
by Dmitriy KulikovMore...
A good comparsion chart showing the relative merits of various audio formats. Includes links to definitions and other support information for each format.
Created: 14/11/1999
by Mark NelsonMore...
The USC-SIPI image database is a collection of digitized images. It is maintained primarily to support research in image processing, image analysis, and machine vision. Contains copies of the mystical goddess Lenna.
Created: 08/11/1999
by Mark NelsonMore...
The page contains prepublished versions of H.263 standard, H.264 / AVC standard, H.264 conformance specification, H.264 reference software specification. Other pages of the site--it's the homepage of the video trace research group at Arizona State University--have some papers and software.
There are also several video testing sequences. The sequences are in the common YUV 4:2:0 format (files are zipped) and in CIF (Bridge close, Bridge far, Highway, Mobile, Paris) and QCIF resolutions (Bridge close, Bridge far, Carphone, Claire, Container, Foreman, Grandma, Highway Mother and Daughter, News, Salesman, Silent).
Created: 11/07/2005
by Maxim SmirnovMore...
Commercial software (expensive). Evaluation version available on request.
Software tool for video format checking, compression analysis, testing and optimisation. It supports the following video formats:
- H.264/AVC: Baseline, Main, Extended and High Profiles/FRExt (incl. High 10, 4:2:2 and 4:4:4)
- MPEG-4 Simple Profile and Advanced Simple Profile
- MPEG-2 Main Profile Main Level and High Level
- SMPTE VC-1 / WMV9 Simple, Main and Advanced Profiles
- H.263+, H.263 and H.261
plus the following audio codecs:
- MPEG-1/MPEG-2 audio
- AAC
- AACplus
- HE AAC
with several other audio codecs being added.
Created: 31/05/2005
by Thomas DoveMore...
ACT - by Jeff Gilchrist. ACT is the Archive Comparison Test, a long running benchmark on well known archiving programs.
Created: 02/06/2002
by Mark NelsonMore...
Unlike some other compressor comparison sites, I won't be looking for a compressor offering for the last bit of compression. Instead I'll try to find the most practical compressor out there.
Created: 10/07/2004
by Mark NelsonMore...
I believe this page contains test sequences and software for the Video Quality Experts group. It appears that the software and sequences are available for the public.
Created: 16/05/2004
by Mark NelsonMore...
From the site: Epic24 is a GUI program that I wrote to interactively compare graphic compression codecs against each other. It currently contains JPG, Lossless JPG, JPEG 2000, (Jasper Library Implementation), PNG, John Robinson's BTP and ATP, and finally my own lossless graphics compression called IMPLODE (IMage Predictive LOssless Decoder Encoder).
Created: 27/03/2004
by Mark NelsonMore...
Werner Bergmans has created a new benchmark site that aims to show the best compression ratios possible for multiple file types, including English text, executables, graphics, and so on. Werner says he is running these tests with 80-100 programs for each file type!
Reader Werner B. says Useful site to compare results of different compression programs. Regularly updated.
Created: 28/02/2004
by Mark NelsonMore...
Roberto Amorim is a familiar and friendly presence on the Hydrogen Audio board. This link points to the many audio compression listening tests he has conducted. These include evaluations of AAC and MP3 encoders at a rew different rates.
Created: 14/02/2004
by Mark NelsonMore...
Comparisions of over 230 archivers, in handy Excel format, from Berto.
Reader Emiliano C. said "Wonderful! Great! Wonderful! Cool!"
Created: 10/09/2003
by Mark NelsonMore...
The folks at LIVE conducted a subjective test of images at various compression levels, and have made the results available here. The images and results are both available here.
Created: 23/04/2003
by Mark NelsonMore...
PC Magazine used a jury to compare the codecs used in several popular media players, with interesting results.
Created: 14/01/2003
by Mark NelsonMore...
A set of benchmark results that compare various versions of LHA and jLHA. (jLHA is an LHA library found on the same web site.)
Created: 07/10/2002
by Mark NelsonMore...
Josh Taylor of ZDNet did a quickie informal comparison of the new Windows Media 9 format and gives it a thumbs-up.
Created: 15/09/2002
by Mark NelsonMore...
This German news item reports on a test that pitched Ogg Vorbis against MP3, Window Media, AAC, and RealAudio. My Babelfish translation says In particular with 64 kBit/s Ogg Vorbis could convince and left the entire prominent competition behind itself. I think that means it won!
Created: 15/09/2002
by Mark NelsonMore...
This web site aims to provind blind quality testing of sound codecs. The range of tested codecs includes various MPEG-4 AAC, MPEG-1 Layer III, OggEnc, WMA, RealAudio.
Created: 18/08/2002
by Mark NelsonMore...
Ross Arnold and Tim Bell, "A Corpus for the Evaluation of Lossless Compression Algorithms", Proc. IEEE Data Compression Conference, Snowbird, Utah, March 1997.
Created: 25/12/2001
by Mark NelsonMore...
A study at the University of Florida showed that even mildly compressing coronary angiograms led to an increase in diagnostic errors.
Created: 05/12/2001
by Mark NelsonMore...
The author of this page clearly has a bone to pick with some of the MP3 decoders out there. From the site: This site contains test results on a number of mp3 decoders. Such a test wouldn't be necessary if all decoders worked properly, but unfortunately they don't. In fact the outputs of many popular decoders were found to be incorrect. .
Created: 30/08/2001
by Mark NelsonMore...
Zarak Systems will perform Quality of Service testing using PSQM, the Perceptual Speech Quality Measurement. This web page will tell you a little bit about what that means to you.
Created: 11/06/2001
by Mark NelsonMore...
A set of benchmarks for lossless compression of various test sets, including the CCITT B&W images, the Calgary Corpus, and a Gray Scale set. Includes some dates for checking historical progression.
Created: 24/12/1998
by Mark NelsonMore...
A set of test results for files run against the Calgary Corpus. This set of test results are kept on the Canterbury web site so that they can be easily referenced for comparison purposes.
Created: 12/12/1998
by Mark NelsonMore...
