Adjusting Hue in Video decoders and HDMI receivers

Hi,

Hue adjustment is done on YCrCb data stream;

It can be done in CP-core by:

• Enabling video adjustmnets (VID_ADJ_EN, CP-core, 0x3E[7] in ADV7611/2/9)
• Setting hue to desired value (CP_HUE, CP-core, 0x3D[7:0] in ADV7611/2/9)

Cb_out = Cb*cos(hue) + Cr*sin(hue)

Cr_out = Cr*cos(hue) - Cb*sin(hue)

I'm attaching example spreadsheet with rotation calculated from measured video

stream. 8-bit YCrCb 444 stream used with EVAL-ADV7611EB1Z.

Best regards,

vito

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