SAA7128H/V1 NXP Semiconductors, SAA7128H/V1 Datasheet - Page 9

• Manufacturer Part Number: SAA7128H/V1
• Manufacturer: NXP Semiconductors

Specifications of SAA7128H/V1

• Adc/dac Resolution: 10b
• Screening Level: Commercial
• Package Type: PQFP
• Pin Count: 44
• Lead Free Status / RoHS Status: Compliant

Philips Semiconductors
9397 750 14325
Product data sheet
7.1.1.4 Configuration 4
7.1.2 Parameters of the fader
Only MP
(RGBIN = ENCIN = 0).
Basically, there are three independent fade factors available, allowing for the equation:
Output = (FADEx
Where x = 1, 2 or 3.
Factor FADE1 is effective, when a color in the data stream fed to the MPEG port fader
input is recognized as being between KEY1L and KEY1U. That means, the color is not
identified by a single numeric value, but an upper and lower threshold in a 24-bit YUV
color space can be defined. FADE1 = 00h results in 100 % signal at the MPEG port fader
input and 0 % signal at the fader video port input. Variation of 63 steps is possible up to
FADE1 = 3Fh, resulting in 0 % signal at the MPEG port fader input and 100 % signal at
the fader video port input.
Factor FADE2 is effective, when a color in the data stream fed to the MPEG port fader
input is recognized as being between KEY2L and KEY2U. FADE2 is to be seen in
conjunction with a color that is defined by a 24-bit internal Color Look-Up Table (CLUT).
FADE2 = 00h results in 100 % of the internally defined LUT color and 0 % signal at the
fader video port input. Variation of 63 steps is possible up to FADE2 = 3Fh, resulting in
0 % of the internally defined LUT color and 100 % signal at the fader video port input.
Finally, factor FADE3 is effective, when a color in the data stream fed to the MPEG port
fader input is recognized as neither being between KEY1L and KEY1U nor being between
KEY2L and KEY2H. FADE3 = 00h results in 100 % signal at the MPEG port fader input
and 0 % signal at the fader video port input. Variation of 63 steps is possible up to
FADE3 = 3Fh, resulting in 0 % signal at the MPEG port fader input and 100 % signal at
the fader video port input.
Optionally, all upper and lower thresholds can be ignored, enabling to fade signals only
against the LUT color.
If bit CFADM is set HIGH, all data at the MPEG port fader are faded against the LUT color,
if bit CFADV is set HIGH, all data at the video port fader are faded against the LUT color.
Fig 7. Configuration 4
B
input is in use; its signal is both composite (and S-video) and RGB encoded
In1) + [(1
Rev. 03 — 9 December 2004
MP
MP
A
B
FADEx)
ENCODER
RGB PATH
PATH
SAA7128H; SAA7129H
In2]
mhb578
e.g. video recorder
e.g. TV
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Digital video encoder
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