From 9c41f509b86de0639e6f3197f64f3a64d782bc11 Mon Sep 17 00:00:00 2001 From: digitaltvguy Date: Mon, 30 Sep 2024 08:50:10 -0400 Subject: [PATCH] Added table with 16bit full and narrow range values to replace current definition for "reference image" which only described Full Range Quantization. --- index.html | 38 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 36 insertions(+), 2 deletions(-) diff --git a/index.html b/index.html index bb31091..19783bd 100644 --- a/index.html +++ b/index.html @@ -780,9 +780,43 @@

Images

channel. Each channel has a sample depth in the range 1 to 16, which is the number of bits used by every sample in the channel. Different channels may have different sample depths. The red, green, and blue samples determine the intensities of - the red, green, and blue components of the pixel's color; if they are all zero, the pixel is black, and if they all have + the red, green, and blue components of the pixel's color. + +

The following table describes the quantization of image black to image peak white (signal range). By default the signal range is full-range + but it can also be represented as narrrow range, which conforms to quantization in broadcast video which typically uses the YCbCr Color + Representation. cICP can specify this specific range:

+ +
+ + + + + + + + + + +
+ Full and Narrow Range Signal Range (Quantization Method) +
16bit Signal Range (Quantization for Full and Narrow Ranges)BlackWhite
+ + + + + + + + + + + + +
Full Range655350
Narrow Range601604096
+
+ - their maximum values (2sampledepth-1), the pixel is white. The alpha sample determines a pixel's degree of + The alpha sample determines a pixel's degree of opacity, where zero means fully transparent and the maximum value means fully opaque. In a three-channel reference image all pixels are fully opaque. (It is also possible for a four-channel reference image to have all pixels fully opaque; the difference is that the latter has a specific alpha sample depth, whereas the former does not.) Each horizontal row of