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STK6005

5.3 YUV to RGB Space Converter

For video input (EnYUV = 1), the input YUV (YCbCr) data are converted internally into RGB format by

the following equations.

R = Y + 1.371 (Cr – 128)

G = Y - 0.698 (Cr – 128) – 0.336 (Cb – 128)

B = Y + 1.732 (Cb – 128)

5.4 De-Interlace

For interlace input, the input image is separated into even and odd fields. Due to no frame buffer

available, STK6005 employs the spatial interpolation method to calculate the missing lines from their

neighboring lines. Internal register 0x1C should be set to enable a de-interlace function.

5.5 Input Synchronous Signals Processing

STK6005 provides a composite sync separation hardware to separate V-Sync from C-Sync and re-

generate the H-Sync for the external ADC chip. STK6005 supports three combinations of input H / V

synchronous signals (before ADC) which are composite sync signal from CSync or from VGAHS port, and

separated sync signals from the VGAHS and VSync ports. An H-Sync output will be re-generated from

DCLK

PE_R/G/B

RGB0 RGB1 RGB2

RGB3 RGB4 RGB5 RGB6 RGB7

PO_R/G/B

Hi-Z / 0

PVS/PHS

PDE

Single port output mode timing diagram

DCLK

PE_R/G/B

RGB0 RGB2 RGB4 RGB6 RGB8

PO_R/G/B

RGB1 RGB3 RGB5 RGB7 RGB9

PVS/PHS

PDE

Dual port output mode timing diagram

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