1996 Jun 17

11

Philips Semiconductors

Preliminary specification

YUV picture improvement processor based

on histogram modification and blue stretch

TDA9171

Fig.4

Static error on average histogram amplitude (pin TAUHM) as a function of effective histogram

defined by the non-blanking periods of the sandcastle signal in one field.

handbook, halfpage

020

100

0

20

MBE995

40

60

80

4

8

12

16

QTHMS

(%)

Weff = tnonblanking_of_SC x Rmiscount(ms)

Fig.5 Non-linear amplifier gain as a function of input voltage at pin NLC.

handbook, halfpage

1.25

2.25

3.25

5.25

1

0.75

0.25

0

0.5

MBE996

4.25

GNLC

ViNLC (V)