https://wiki.multimedia.cx/index.php?action=history&feed=atom&title=VBLEVBLE - Revision history2026-04-18T09:34:05ZRevision history for this page on the wikiMediaWiki 1.39.5https://wiki.multimedia.cx/index.php?title=VBLE&diff=13691&oldid=prevKostya at 19:45, 9 November 20112011-11-09T19:45:19Z<p></p>
<p><b>New page</b></p><div>* FourCC: VBLE<br />
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VBLE is a lossless codec for YUV colourspace written by a person known as Mark FD.<br />
It employs standard median prediction and coding components with reduced number of bits.<br />
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== Frame format ==<br />
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Bitstream is stored in little-endian words LSB first.<br />
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Image data is coded in that order: the line of luma values, two lines of chroma values, all data is coded as pixel quads.<br />
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In the beginning of frame data there are four unary codes for each quad element size in bits.<br />
The rest of data are quad values written with that number of bits.<br />
After decoding pixel values first are renormalised by formula <code>pix & 1 ? 255 - (pix >> 1) : (pix >> 1)</code> and for each plane median restoration is applied.<br />
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[[Category:Video Codecs]]<br />
[[Category:Video FourCCs]]</div>Kostya