SAA7154E/V2/G NXP Semiconductors, SAA7154E/V2/G Datasheet - Page 23

• Manufacturer Part Number: SAA7154E/V2/G
• Manufacturer: NXP Semiconductors

Specifications of SAA7154E/V2/G

• Adc/dac Resolution: 10b
• Screening Level: Commercial
• Package Type: LBGA
• Pin Count: 156
• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
SAA7154E_SAA7154H_2
Product data sheet
7.6.1.2 Color transient improvement
7.6.1.3 Luminance sharpness control
Blue stretching:
sufficient contrast towards more blue to obtain a brighter impression of the picture. The
blue stretch gravity block works slightly different to the gravity block described above.
The center of gravity here is not the same as the center of the programmable range. The
center of range is fixed with C
To every C
by a relative luminance of at least 80 %, a certain portion of C
The range and strength of this operation is programmable.
Green enhancement:
vivid. All color vectors whose angles are within a predefined value for green hue are
amplified around a center of gravity by a certain amount.
The position of the center of gravity, range and strength of this operation is programmable.
Adjustable skin tone correction:
trek or flesh tone correction, continuously evaluates the angle of the vector in the C
color plane. Whenever particular pixel fall into a skin tone area, their vector is rotated
(eventually stretched or squeezed in length), thus pointing into the direction of a
programmable target angle and saturation around a center of gravity.
The position of the center of gravity, range and strength of this operation is programmable.
Color Transient Improvement (CTI) after the scaler block evaluates transients in the C
domain and, depending on their amplitude, these transients are made steeper without
generating overshoot. For a particular high-pass filter, center frequencies of approximately
0.125
scaler output clock, normally the clock at pin ICLK); thus the degree of slope improvement
is proportional to the output (display) clock f
sharpness is achieved especially for SECAM originated test signals.
The sharpness control (luminance peaking), also used in the SAA7118, is located after
the video decoder block and a more versatile sharpness control has been added to part of
the I-port processing chain.
Center frequencies of approximately 0.2
can be selected as shown in
(display) clock f
in 8 steps.
f
clk(o)(SC)
B
-C
R
clk(o)(SC)
color vector falling into a range close to C
and 0.17
This blue stretch circuit is intended to shift color close to white with
Rev. 02 — 6 December 2007
. The amount of luminance peaking can be set from 0 dB to 12 dB
Green enhancement makes pictures with green content more
f
Figure
clk(o)(SC)
B
= C
R
Automatic skin tone correction, also known as color
10; thus, the actual frequencies depend on the output
= 0h whereas the center of gravity is blue.
can be selected (f
SAA7154E; SAA7154H
Multistandard video decoder with comb filter
f
clk(o)(SC)
clk(o)(SC)
, 0.25
. A higher subjective impression of
clk(o)(SC)
B
f
= C
clk(o)(SC)
B
color component is added.
R
is the frequency of the
= 0h and accompanied
and 0.3
© NXP B.V. 2007. All rights reserved.
f
clk(o)(SC)
23 of 90
B
-C
B
-C
R
R