Datasheet

16
SLES084C − August 2007TVP5146
f – Frequency – MHz
−1
0
1
2
3
4
5
6
7
01234567
Gain = 0
Gain = 2
Peak at
f = 2.89 MHz
Gain = 0.5
Gain = 1
Amplitude − dB
Figure 2−15. Peaking Filter Response, PAL Square Pixel Sampling
2.2.3.1 Color Transient Improvement
Color transient improvement (CTI) enhances horizontal color transients by delay modulation for
both color difference signals. The operation must be performed only on YCbCr-formatted data.
The color difference signal transition points are maintained, but the edges are enhanced for
signals which have bandwidth-limited color components (for example, CVBS and S-video).
2.2.4 Component Video Processor
The component video processing block supports a user-selectable contrast, brightness, and
saturation adjustment in YCbCr output formats. For YCbCr output formats, gain and offset
values are applied to the luma data path in order to map the pixel values to the correct output
range (for 10-bit Y
min
= 64 and Y
max
= 940), and to provide a means of adjusting contrast and
brightness. For Y, digital contrast (gain) and brightness (offset) factors can vary from 0 to 255.
The contrast control adjusts the amplitude range of the Y output centered at the midpoint of the
output code range. The limit block limits the output to the ITU-R BT.601 range (Y
min
to Y
max
) or
an extended range, depending on a user setting.
x
Gain
Y
Y
Limit+
Offset
Figure 2−16. Y Component Gain, Offset, Limit