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PI7VD9004ABH Datasheet(PDF) 12 Page - Pericom Semiconductor Corporation

Part No. PI7VD9004ABH
Description  Adaptive EQ 4-channel 960H Video Decoder
Download  53 Pages
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Maker  PERICOM [Pericom Semiconductor Corporation]
Homepage  http://www.pericom.com
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PI7VD9004ABH Datasheet(HTML) 12 Page - Pericom Semiconductor Corporation

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PI7VD9004ABH
Adaptive EQ 4-channel 960H Video Decoder
Pericom Semiconductor Corporation  
12 
www.pericom.com     
 
 
 
4.5
Comb filter and Y/C Separation
Thevideo decoder is capable of separating luma (Y) and chroma (C) of NTSC or PAL video signals using 5-line adaptive
comb filter or notch/band-pass filter. The comb filter searches for correlation between 5 lines of input video stored in the
internal buffer. The lines are averaged based on the degree of correlation to produce the output video line. If no correlation
is found between the 5 lines of video, notch/band-pass filter is used. This process is very effective at reducing cross-luma
and cross-chroma noise. The noise appears as artifacts that degrade the image quality. Reduction of the noise improves the
image quality significantly.
4.6
Video Signal Processing
The chip is capable of processing digital video signal to fulfill better detection in a noisy environment and achieve good
image quality for viewing as well. For video signal detection, a resilient SYNC TIP detection mechanism is implemented to
locate VSYNC and HSYNC correctly in order to lock the video frame or video line.
6.392
6.394
6.396
6.398
6.4
6.402
6.404
6.406
6.408
6.41
6.412
x 10
5
-100
0
100
200
300
400
500
600
0.5M Multi-Burst test signal
1.4878 1.488 1.4882 1.4884 1.4886 1.4888 1.489 1.4892 1.4894 1.4896
x 10
6
-100
0
100
200
300
400
500
600
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500m Multi-Burst test signal
13-0174


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