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8 changes: 8 additions & 0 deletions index.html
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Expand Up @@ -3720,11 +3720,19 @@ <h2><span class="chunk">cICP</span> Coding-independent code points for video sig
from <a>full-range images</a> to <a>narrow-range images</a>. It also describes protected code values used for
Serial Digital Interface (baseband video) carriage.
</aside>

<aside class="note">
Whilst common practice has seen the storage of full range images using [[ITU-R-BT.709]] transfer function and primaries in
PNG format, it should be noted that this format is not part of the [[ITU-R-BT.709]] standard.
</aside>

<aside class="note">
When the Video Full Range Flag is set to 0, transfer function inputs may be negative. Therefore, transfer functions should be implemented in such a way as to mirror the transfer function about 0. Pseudo-code example:
<code>out = sign(in) * FUNCTION(abs(in))</code>
</aside>



<p>The <span class="chunk">cICP</span> chunk MUST come before the <a class="chunk" href="#11PLTE">PLTE</a> and <a class=
"chunk" href="#11IDAT">IDAT</a> chunks.</p>

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