STV2310 datasheet(68/112 Pages) STMICROELECTRONICS

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STV2310

68/112

DDECCONT11

DDECCONT12

Address (hex): 11h

Reset Value (bin): 1000 1000

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

SYNC_SLICE_LEVEL[3:0]

Bit Name

Function

SYNC_SLICE_LE

VEL[3:0]

Slicing Level Value

The horizontal PLL requires a slicing level . This bitfield indicates the slicing level as a fraction between the

blanking and the sync tip level. The blanking level is used as the reference level for the clamp mechanism.

(See also bit BLANKMODE[1:0] in register

DDECCONT1). The sync tip level is computed from the input

video signal by the synchronization mechanism.

0000: Slicing Level = Blank Level

1111: Slicing Level = (Blank – sync tip )/16 + sync tip

Bits[3:0]

Reserved. Must be set to 0000.

Address (hex): 12h

Reset Value (bin): 0000 0000

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

SPC_NTSC

_GREEN_E

TINTANGLE[4:0]

Bit Name

Function

Bits[7:6]

Reserved. Must be set to 00.

SPC_NTSC_GRE

EN_EN

Green Enhancement Mode Enable

The Green Enhancement mechanism is applied to the CVBS flow only and is only valid for the NTSC M and

the NTSC 4.43 standards. The green tone axis has been defined as flesh tone axis + 90 degrees in the

vectorscope representation (i.e. 213 or 207 degrees). Green enhancement is only performed during the

active line. Green enhancement operates through saturation increase. Saturation increase factor k is a

linear function of the color phase distance to green axis.

k = 1 for color phase - green axis = ± 22.5 degrees (minimum value)

k = 1.2 for color phase = green axis (maximum value)

(k always 1 when color phase not at 22.5 degrees of green axis)

0: Green Enhancement mode is disabled.

1: Green Enhancement mode is enabled.

TINTANGLE[4:0]

Tint Angle

The Tint Angle is applied to the Cr and Cb values of the RGB data flow after the RGB to YCrCb conversion.

The Tint Angle is coded from -20° to +20° in steps of 1.33°. The bitfield is coded in 2's complement.

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