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diff --git a/Documentation/media/uapi/v4l/yuv-formats.rst b/Documentation/media/uapi/v4l/yuv-formats.rst new file mode 100644 index 000000000..9ab0592d0 --- /dev/null +++ b/Documentation/media/uapi/v4l/yuv-formats.rst @@ -0,0 +1,56 @@ +.. -*- coding: utf-8; mode: rst -*- + +.. _yuv-formats: + +*********** +YUV Formats +*********** + +YUV is the format native to TV broadcast and composite video signals. It +separates the brightness information (Y) from the color information (U +and V or Cb and Cr). The color information consists of red and blue +*color difference* signals, this way the green component can be +reconstructed by subtracting from the brightness component. See +:ref:`colorspaces` for conversion examples. YUV was chosen because +early television would only transmit brightness information. To add +color in a way compatible with existing receivers a new signal carrier +was added to transmit the color difference signals. Secondary in the YUV +format the U and V components usually have lower resolution than the Y +component. This is an analog video compression technique taking +advantage of a property of the human visual system, being more sensitive +to brightness information. + + +.. toctree:: + :maxdepth: 1 + + pixfmt-packed-yuv + pixfmt-grey + pixfmt-y10 + pixfmt-y12 + pixfmt-y10b + pixfmt-y10p + pixfmt-y16 + pixfmt-y16-be + pixfmt-y8i + pixfmt-y12i + pixfmt-uv8 + pixfmt-yuyv + pixfmt-uyvy + pixfmt-yvyu + pixfmt-vyuy + pixfmt-y41p + pixfmt-yuv420 + pixfmt-yuv420m + pixfmt-yuv422m + pixfmt-yuv444m + pixfmt-yuv410 + pixfmt-yuv422p + pixfmt-yuv411p + pixfmt-nv12 + pixfmt-nv12m + pixfmt-nv12mt + pixfmt-nv16 + pixfmt-nv16m + pixfmt-nv24 + pixfmt-m420 |