422_to_444.zip_422转444_yuv422 to yuv444_yuv422 yuv444 fpga_yuv42

XAPP294 (Draft) December 19, 2001 www.xilinx.com 1

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© 2001 Xilinx, Inc. All rights reserved. All Xilinx trademarks, registered trademarks, patents, and disclaimers are as listed at http://www.xilinx.com/legal.htm.

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Summary The video standard ITU-R BT.601 was introduced as the need for transporting digital

, Chroma (Cb and Cr) is provided at 1/2 the data rate as Luma. Since the

video storage and digital video bandwidth can be reduced. Relative to the incoming Luma

Chroma. Refer to application note XAPP286 "Video Line Field Decode"

for this information.

The video data words are conveyed as a 27 MHz data stream in the following order:

2 www.xilinx.com XAPP294 (Draft) December 19, 2001

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contains 864 samples (720 active) with 625 total lines (576 active lines).

The conversion between PAL and NTSC is relatively straightforward. Unfortunately, in a multi-

media environment, the data must eventually be transformed from Y’CrCb 4:2:2 to R’G’B’ 4:4:4

.

[1]

. Although, filters may not completely adhere to the ITU-R

application note.

merely an average of two available Crs or Cbs to arrive at a missing one.