What is GDCC

The competition is for software engineers, researchers, students and enthusiasts in the field of lossless data compression. The contest includes several main categories open to anyone who meets the general requirements, as well as a special category for students. We test compressors under the following scenarios:

Test 1:
Qualitative-data compression

Filtered Chinese Wikipedia DB data

In 3 categories

Test 2:
Quantitative-data compression

16-bit multispectral images, 16-bit integer and 32-bit floating point telemetry data

In 3 categories

Test 3:
Mixed-data compression

Preprocessed ARM64 executable files mixed with scientific data containing 32-bit floating-point numbers and 32-bit integers

In 3 categories

Test 4:
Small-block-data compression

Mixture of Test 1 and Test 3 data to be compressed independently in 64 KiB blocks but allowing random-access decompression in 8 KiB blocks

In 3 categories

Test 5:
Student test

Participants must generate a parameter file for the provided compressor that minimizes compressed-data size for Test 1 data

Optimize a given compressor using parameter file.

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Main Rules

CATEGORIES
  • 12 main categories: compress 4 different test data sets, with 3 speed brackets for each test. Participants may compete in one or more categories.
  • Student category: optimize a given compressor using parameter file.
Awards & PRIZES

• 5,000 EUR, 3,000 EUR, and 1,000 EUR awards for first, second, and third places, respectively, in all 12 main categories and the student category. Each category has its own prizes.
• 500 EUR award each for places 4–13 in the student category.
• 20,000 EUR grand prize for the winner in block-test rapid category who meets certain conditions.
• 5,000 EUR “gap” prize in all 12 main categories when the first-place competitor wins by a sufficiently large margin over the second-place competitor.

SCHEDULE

• Submit compressors beginning June 21, 2021 to join the leaderboards.
• Compressor submissions must be executable files for Windows or Linux.
• Leaderboards updated monthly (or more often)
• Deadline for new and updated submissions is November 15, 2021.
• Results to be announced by December 15, 2021.
• Prizes awarded in accordance with the final leaderboards.

COMPRESSORS
  • In all tests, the data we use for scoring is private.
  • We provide sample data, or training data, that is of the same nature and similar to, yet different from, the private test set.
  • We accept binary submissions; source codes are unnecessary unless required by library or software-block licenses on which the submitted compressor is based.
More rules & faq

Schedule

  • June

    Submit compressors beginning
    June 21, 2021 to join the leaderboards.

  • JUl-OCT

    We will be publishing intermediate results at least once a month.

  • NOVEMBER

    Deadline for new and updated submissions is November 15, 2021

  • DECEMBER

    Results to be announced by December 15, 2021.
    Prizes are given according to the final leaderboards.

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Make a first step

Submit compressors beginning June 21, 2021 to join the leaderboards

Send the form

Please read the rules before participating

Board of experts

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Jarek Duda

PhD (computer science, physics) working at Jagiellonian University, author of Asymmetric Numeral Systems (used e.g. in Zstandard, LZFSE, JPEG XL), focused on information theory, statistical modelling, data compression.

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Shen Jianqiang

Chief algorithm engineer of Huawei IT Product Line Data Management Algorithm Competence Center, with more than 20 years of research and development experience, currently focusing on storage algorithm research.

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Dmitriy Vatolin

A PhD, video-codec developer and coauthor of a book on data compression. Supervisor of collaborative video- and image-processing research projects that include Broadcom, Huawei, Intel, RealNetworks, Samsung and other leading companies. Instructs courses on methods of 3D and 2D video and image processing and compression.

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Ilya Papiev

Has more than 10 years of experience in enterprise-storage-systems-related research and development such as data reduction, data tiering. Main research interest is in efficient and high performance lossless data compression.

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Alexander Rhatushnyak

A PhD developing data-compression algorithms since the 1990s. Coauthor of a book and patents on data compression, co-creator of the JPEG-XL standard, and multiple-time winner of the Hutter Prize and Calgary Corpus Compression Challenge—the only ongoing competitions (before ours) in lossless data compression.

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Eugene Shelwien

Developer of recompression algorithms for Deflate, JPEG, MP3, AAC, proprietary audio codecs and the .pa compression format. Administrator of Encode.su, the biggest international forum covering data-compression algorithms and software.

Category Awards

Qualitative data

Quantitative data

Mixed data

Block

STUDENT

First place
5,000 EUR

+ 5,000 EUR IF YOUR COMPRESSOR BEATS THE SECOND PLACE BY A LARGE GAP

Second place
3,000 EUR
Third place
1,000 EUR
First place
5,000 EUR

+ 5,000 EUR IF YOUR COMPRESSOR BEATS THE SECOND PLACE BY A LARGE GAP

Second place
3,000 EUR
Third place
1,000 EUR
First place
5,000 EUR

+ 5,000 EUR IF YOUR COMPRESSOR BEATS THE SECOND PLACE BY A LARGE GAP

Second place
3,000 EUR
Third place
1,000 EUR
grand prize
20,000 eur
First place
5,000 EUR

+ 5,000 EUR IF YOUR COMPRESSOR BEATS THE SECOND PLACE BY A LARGE GAP

Second place
3,000 EUR
Third place
1,000 EUR
First place
5,000 eur
Second place
3,000 EUR
Third place
1,000 EUR
4-13 place
500 EUR
award certificate for each place

GDCC 2021 is brought to you by

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IT Product Line

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CS MSU Graphics & Media Lab Video Group

2020 Contest
results

50000 eur

total prize fund

12

competition categories by data type and processing speed

250+

applications

40

universal and image compressors

12-25%

better compression ratio than for popular reference compressors for certain categories
Strong results in all categories

Want to participate?

Fill out the form to take part in the competition

  • Peter Thamm
  • Dmitry Shkarin
  • Andreas Debski
  • Marcio Pais
  • Konstantinos Agiannis
  • Mathieu Chartier
  • Frederic Langlet
  • 1 place in 4th test: block
  • 1 place in 1st test: text
  • 1 place in 2nd test: image
  • 1 place in 3rd test: mixed
  • 2 place in 1st test: text
  • 2 place in 2nd test: image
  • 3 place in 3rd test: mixed

Still have any questions?