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View Full Version : What does the QT means in HM codes?

xkfz007
19th March 2014, 03:51
In the HM source codes, there are a lot of functions ended with "QT", such as xEstimateResidualQT, xRecurIntraCodingQT, estIntraPredQT. I am confused about the "QT" ending. Does anyone know the underlying meaning of "QT" used by the HM programmers.
EagleDivX
19th March 2014, 10:32
Quad Tree http://en.wikipedia.org/wiki/Quadtree :)
xkfz007
25th March 2014, 02:29
Quad Tree http://en.wikipedia.org/wiki/Quadtree :)

In the other forum, someone said the "QT" in the functino names, such as xRecurIntraCodingQT, stood for "Quantation and transform". That means in these functions, Quantation and Transform will be carried out. In consideration of the relationship between these functions and the RDO, I think this is a better explanation.