1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
9 YUV is the format native to TV broadcast and composite video signals. It
10 separates the brightness information (Y) from the color information (U
11 and V or Cb and Cr). The color information consists of red and blue
12 *color difference* signals, this way the green component can be
13 reconstructed by subtracting from the brightness component. See
14 :ref:`colorspaces` for conversion examples. YUV was chosen because
15 early television would only transmit brightness information. To add
16 color in a way compatible with existing receivers a new signal carrier
17 was added to transmit the color difference signals. Secondary in the YUV
18 format the U and V components usually have lower resolution than the Y
19 component. This is an analog video compression technique taking
20 advantage of a property of the human visual system, being more sensitive
21 to brightness information.