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TDA9178

YUV one chip picture improvement based on luminance vector-, colour vector- and spectral processor

Philips Electronics 

Philips Semiconductors

YUV one chip picture improvement based on luminance

vector-, colour vector- and spectral processor

Preliminary specification

TDA9178

SYMBOL

PARAMETER

CONDITIONS

Ro

Io(bias)

CL

output resistance

output bias current

load capacitance

COLOUR DIFFERENCE INPUTS U AND V (PINS UIN AND VIN)

Vi(U)(p-p)

input voltage U

(peak-to-peak value)

Vi(V)(p-p)

input voltage V

(peak-to-peak value)

Ii(bias)

input bias current

no clamp

COLOUR DIFFERENCE OUTPUTS U AND V (PINS UOUT AND VOUT)

Vo(cl)

output voltage level during

clamping

GUV(i-o)

Eoffset

∆Gtrack

BUV

gain inputs to output

offset error

UV gain tracking error

bandwidth

transparent

transparent

transparent

1fH mode;

transparent (−3 dB)

2fH mode;

transparent (−3 dB)

Ro

Io(bias)

CL

output resistance

output bias current

load capacitance

Luminance vector processing

MIN.

−

1.3

−

−

−

−

−

0.90

−1

−

2.5

5

−

1.3

−

BLACK STRETCH

BLOScor(i) input black offset correction

8

HISTOGRAM

White-point stretch

GWP(max)

maximum luminance gain for white maximum non-linearity −

stretch

setting gain

Non-linear amplifier

Gnla(min)

minimum segment gain

Gnla(max)

maximum segment gain

Gnla

non-linear control curve

VARIABLE GAMMA

Gg(var)(min)L

Gg(var)(max)

Gnla

minimum variable gamma setting

maximum variable gamma setting

non-linear control curve

maximum non-linearity −

setting gain

maximum non-linearity −

setting gain

63 steps

−

−

−

63 steps

−

TYP.

−

−

−

MAX.

150

−

15

UNIT

Ω

mA

pF

1.33 1.9

V

1.05 1.9

V

−

0.1

µA

2.7

−

V

1.00 1.10

0

+1

%

−

5

%

−

−

MHz

−

−

MHz

−

150

Ω

−

−

mA

−

15

pF

10

12

%

1.1

−

0.4

−

2.0

−

0 to 100 −

%

0.5

−

1.5

−

0 to 100 −

%

1999 Sep 24

16

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