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VirtualDub MSU Deblocking Filter v2.2

MSU Graphics & Media Lab (Video Group)

Take a look at this article on the new site! Follow the link
https://videoprocessing.ai/video_filters/deblocking.html

Algorithm: Dmritriy Vatolin
Implementation: Sergey Grishin

Filter is intended for recovering quality of video ripped from DVD (for example, when it contains 4 hours of video data), VideoCD or after decompressing by H.261, H.263, DivX 3, DivX 4, XviD.

Filter automatically determines the blockiness's strength on the frame and in the concrete part of it, preserving the maximum of details. Thus, filter will process marginally when on scenes with slow motion, while it will smooth very hard in the case of fast motion in the same film.

The main advantage of the filter is that it raises the integral quality in the most widespread PSNR metric in comparison with original film. That is, a film after decompression in comparison with original achieves the lower quality than a film after decompression and deblocking. (But for all that the original film is not used nowise, only decompressed data is used.)

What's new in version v2.0?

  • New version in "High quality" mode works 2.1 times faster than v1.2 and 2.4 times faster in "High speed" mode.
    • Conversions of color spaces optimized (SSE).
    • Horizontal deblocking optimized (ММХ).
    • New option of adjusting speed/quality parameter are available (25% speed improvement).
  • Quality raised.
    • Algorithm of automatic detection of blockiness level improved (more details are preserved).
    • Chrominance components processing significantly improved.
    • All basic deblocking methods changed. Discontinuities along borders of blocks is now absent, image looks more "naturally".

What's new in version v2.1?

  • SSE optimization used only if it is supported by processor and OS
  • Bug fixed: log is not created now
  • Bug fixed: there is now no crashes during processing of frequencies in high resolution

What's new in version v2.2?

  • Bug fixed: automatic SSE support detection is now works correctly
  • Possibility of manual SSE instructions disabling in case SSE is supported by CPU and OS

Settings

Filter's interface allows to adjust the quality and the speed of processing. In "High speed" mode optimized version of horizontal deblocking works, which has slightly lower quality in comparison to "High quality" mode. In "High speed" mode filter works 25% faster. Using U-deblock & V-deblock it is possible to turn on/off the processing of chrominance components (turning these parameters on noticeably raise the visual quality). Using "SSE instructions" parameter it is possible to disable SSE if it is supported by the CPU and OS.

Filter supports Job Control, and it can be used from AviSynth. Example: 

LoadVirtualDubPlugin("...\VirtualDub\plugins\MSU_DeBlock.vdf","Deblock", 0)
clip=AVISource("...\clip_input.avi", false, "RGB24")clip.ConvertToRGB32.Deblock(1, 1, 1, 1)

First filter parameter - U component deblocking
Second filter parameter - V component deblocking
Third filter parameter - high quality mode
Forth filter parameter - SSE instructions utilization

The Appearance Of The Filter

Examples

Let's consider the maintenance of the filter by the example of the test video sequence called "Battle"(The part of film "Terminator 2"). Case of very low bitrate:

Frame from decompressed film
Frame before processing 		Processed by the filter v1.2
The same frame after processing by version 1.2 		Processed by the filter v2.0
The same frame after processing by version 2.0

The next sample is an example of processing the sequence "foreman" (frame 152, compressed using Xvid with bitrate option 50kbs):

Frame from decompressed film
Frame before processing 		Processed by the filter v1.2
The same frame after processing by version 1.2 		Processed by the filter v2.0
The same frame after processing by version 2.0

Examples of filter performance on sequence "battle". Samples are placed in order of increasing of bitrate (frame 65, compressed using Xvid with bitrate option 100, 300, 500kbs):

Frame from decompressed film
Frame before processing 		Processed by the filter
The same frame after processing
Frame from decompressed
Frame before processing 		Processed by the filter
The same frame after processing
Frame from decompressed
Frame before processing 		Processed by the filter
The same frame after processing

Let's consider the maintenance of the filter by the example of test sequence called "Foreman"(frame 155, compressed using Xvid with bitrate option 50, 75, 100kbs):

Frame from decompressed film
Frame before processing 		Processed by the filter
The same frame after processing
Frame from decompressed
Frame before processing 		Processed by the filter
The same frame after processing
Frame from decompressed
Frame before processing 		Processed by the filter
The same frame after processing

There is two branches on the graph: the first (Blocked) corresponds to the film after decompression, the second one (MSU Deblocking) - to the film after decompressing and deblocking. The Y-direction is graduated by Y-PSNR metric of the film in comparison to an original one, noncompressed film. The X-direction is graduated by the bitrate (kbit/sec). Thus, it is easy to see that the quality of the film after deblocking is noticeably higher, at that the lower bitrate the higher difference.

Graph of quality modification depending on the bitrate
Raising of the quality after deblocking

Graph of quality modification depending on the bitrate
Raising of the quality after deblocking

License

  • Program license for non-commercial usage
  • Program license for usage in companies
    If you have discount code (e.g. as successful tester) please use this form

    • Download

    See also

    E-mail:
    For common questions about filter's work please contact us
    For commercial license of this filter (commercial usage is not free) please contact us сontact email

    Another resources

    Video resources:

    3D and stereo video
    Projects on 3D and stereo video processing and analysis
    MSU Video Quality Measurement tools
    Programs with different objective and subjective video quality metrics implementation     		Codecs comparisons
    Objective and subjective quality evaluation
    tests for video and image codecs
    Ext. link: x264 parameters efficiency comparison
    Public MSU video filters
    Here are available VirtualDub and AviSynth filters. For a given type of digital video filtration we typically develop a family of different algorithms and implementations. Generally there are also versions optimized for PC and hardware implementations (ASIC/FPGA/DSP). These optimized versions can be licensed to companies. Please contact us for details via video(at)graphics.cs.msu_ru.     		Filters for companies
    We are working with Intel, Samsung, RealNetworks and other companies on adapting our filters other video processing algorithms for specific video streams, applications and hardware like TV-sets, graphics cards, etc. Some of such projects are non-exclusive. Also we have internal researches. Please let us know via video(at)graphics.cs.msu_ru if you are interested in acquiring a license for such filters or making a custom R&D project on video processing, compression, computer vision.
    Video codecs projects
    Different research and development
    projects on video codecs     		Other
    Other information
    Last updated: 12-May-2022

    Server size: 8069 files, 1215Mb (Server statistics)

    Project updated by
    Server Team and MSU Video Group

    Project sponsored by YUVsoft Corp.

    Project supported by MSU Graphics & Media Lab