Re: [RFC PATCH v3 1/2] media: docs-rst: Append HEVC specific term

Jernej Škrabec
2022-03-28T17:10:25Z

Dne nedelja, 27. marec 2022 ob 10:43:08 CEST je Sebastian Fricke napisal(a):
> 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.
>

Looks good to me.

Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>

Best regards,
Jernej

> Signed-off-by: Sebastian Fricke <sebastian.fricke@collabora.com>
> ---
> Documentation/userspace-api/media/v4l/dev-decoder.rst | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/userspace-api/media/v4l/dev-decoder.rst
> b/Documentation/userspace-api/media/v4l/dev-decoder.rst index
> 3cf2b496f2d0..eb5b1b1e3a51 100644
> --- a/Documentation/userspace-api/media/v4l/dev-decoder.rst
> +++ b/Documentation/userspace-api/media/v4l/dev-decoder.rst
> @@ -72,6 +72,11 @@ coded resolution
> coded width
> width for given coded resolution.
>
> +coding tree unit
> + processing unit of the HEVC codec (≘ 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 +109,8 @@ 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