Commit 87581a9e authored by Sebastian Fricke's avatar Sebastian Fricke Committed by Mauro Carvalho Chehab
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media: docs-rst: Append HEVC specific term 



Describe the coding tree unit as replacement for the macroblock in the
HEVC codec. Highlight a key difference of the HEVC codec to predecessors
like AVC(H.264) to give a better overview of the differences between the
coding standards.

[hverkuil: replaced the 'corresponds to' symbol with the full text for clarity]

Signed-off-by: default avatarSebastian Fricke <sebastian.fricke@collabora.com>
Acked-by: default avatarJernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@kernel.org>
parent 6a5446f9

Documentation/userspace-api/media/v4l/dev-decoder.rst

+8 −1
Original line number Diff line number Diff line
@@ -72,6 +72,12 @@ coded resolution 
coded width

   width for given coded resolution.



coding tree unit

   processing unit of the HEVC codec (corresponds to macroblock units in

   H.264, VP8, VP9),

   can use block structures of up to 64×64 pixels.

   Good at sub-partitioning the picture into variable sized structures.



decode order

   the order in which frames are decoded; may differ from display order if the

   coded format includes a feature of frame reordering; for decoders,
@@ -104,7 +110,8 @@ keyframe 
macroblock

   a processing unit in image and video compression formats based on linear

   block transforms (e.g. H.264, VP8, VP9); codec-specific, but for most of

   popular codecs the size is 16x16 samples (pixels).

   popular codecs the size is 16x16 samples (pixels). The HEVC codec uses a

   slightly more flexible processing unit called coding tree unit (CTU).



OUTPUT

   the source buffer queue; for decoders, the queue of buffers containing