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BitJazz
SheerVideo Versatility
Synchromy
SheerVideo is a suite of six codecs for different classes of pixels:
- Sheer RGB[A] 8bf
- Sheer RGB[A] 10bf
- Sheer Y'CbCr[A] 8bv 4:4:4:[4]
- Sheer Y'CbCr[A] 10bv 4:4:4:[4]
- Sheer Y'CbCr[A] 8bv 4:2:2:[4]
- Sheer Y'CbCr[A] 10bv 4:2:2:[4]
Ordinarily, SheerVideo automatically chooses the lossless video compressor
appropriate to the input pixel format, for optimal rapidity, convenience, and fidelity.
But for those occasions when material needs to be converted to a different format,
whether for input, output, or transport to different applications or devices,
every Sheer codec can input and output images in any pixel format,
so that the user can always decide which specific Sheer codec to use.
All color-space conversion between RGB[A] and Y'CbCr[A] is performed by Synchromy,
the most accurate color converter in the world.
In particular, whereas all other color converters are inherently destructive due to rounding errors,
Synchromy converts with absolutely no information loss between the original and final images
in the following workflows:
| input format |
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editing format |
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output format |
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| Y'CbCr[A] 8bv 4:4:4[:4] |
→ |
Sheer RGB[A] 10bf |
→ |
Y'CbCr[A] 8bv 4:4:4[:4] |
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| Sheer RGB[A] 10bf |
→ |
Y'CbCr[A] 12bv 4:4:4[:4] |
→ |
Sheer RGB[A] 10bf |
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| Sheer RGB[A] 8bf |
→ |
Y'CbCr[A] 10bv 4:4:4[:4] |
→ |
Sheer RGB[A] 8bf |
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| RGB[A] 8bf |
→ |
Sheer Y'CbCr[A] 10bv 4:4:4[:4] |
→ |
RGB[A] 8bf |
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| Sheer Y'CbCr[A] 10bv 4:4:4[:4] |
→ |
RGB[A] 12bf |
→ |
Sheer Y'CbCr[A] 10bv 4:4:4[:4] |
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| Sheer Y'CbCr[A] 8bv 4:4:4[:4] |
→ |
RGB[A] 9bf |
→ |
Sheer Y'CbCr[A] 8bv 4:4:4[:4] |
In these workflows, all untouched pixels are visually and mathematically identical to the originals,
and the rest are interpolated as accurately as theoretically possible.
Even for color conversion in a traditional all-8-bit or all-10-bit workflow,
Synchromy reduces the image degradation because of its maximum accuracy.
Note: Y'CbCr values corresponding to undisplayable colors outside the RGB color space
are necessarily clipped to the surface of the RGB cube, even with Synchromy.
(details...)
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