ADV8003 Hardware Manual
Rev. B, August 2013
155
3.2.1.8.
Freezing Output Video
It is possible to freeze the output video from the PVSP by disabling the VIM. This can be achieved by setting
to 0.
3.2.1.9.
Progressive Cadence Detection
The ADV8003 PVSP supports multiple different types of cadence detection. Progressive cadence detection is another feature supported by
ADV8003 when the input video is 60 Hz and the output video is 24 Hz. An example of progressive cadence detection would involve the
ADV8003 detecting a pull-down ratio of 3:2 for 60 Hz video and reconverting this to its original film content at 24 Hz. This would allow
the video to be output at 24 Hz and, therefore, be displayed at the highest image quality possible.
Conversions from slower to higher frame rates are achieved by repeating certain frames. Similarly, conversions from higher to lower frame
rates are achieved by dropping some frames. Care has to be taken with repeating and dropping frames so that the quality of the video is
not impacted. A simple example of frame rate conversion is outlined in
. This example involves converting the input video at a
rate of 24 fps to 30 fps. These two frame rates have a ratio of 4:5; for every 4 frames of input video, there must be 5 frames of output video.
This example uses a cadence detection of 3:2 pull-down which means that for every second frame of video data, an extra field of video
information will be displayed.
A
B
C
D
A
A
B
B
C
C
D
D
D
B
24fps
30fps
F1
F2
F3
F4
F1
F2
F3
F4
F5
2
3
:
2
3
:
A
B
C
D
A
A
B
B
C
C
D
D
D
B
A
B
C
D
A
A
B
B
C
C
D
D
D
B
24fps
30fps
F1
F2
F3
F4
F1
F2
F3
F4
F5
2
3
:
2
3
:
Figure 52: 2:3 Frame Rate Conversion
Progressive cadence detection can be enabled by setting register
to 1.
pcadence_enable
, Primary VSP Map,
Address 0xE84D[1]
This bit is used to enable progressive cadence detection.
Function
pcadence_enable
Description
0
Disable progressive cadence detection
1
Enable progressive cadence detection
Summary of Contents for ADV8003
Page 366: ...ADV8003 Hardware Manual Rev B August 2013 366 Figure 144 ADV8003 Schematic Page 4...
Page 367: ...ADV8003 Hardware Manual Rev B August 2013 367 Figure 145 ADV8003 Schematic Page 5...
Page 368: ...ADV8003 Hardware Manual Rev B August 2013 368 Figure 146 ADV8003 Schematic Page 6...
Page 369: ...ADV8003 Hardware Manual Rev B August 2013 369 Figure 147 ADV8003 Schematic Page 7...
Page 371: ...ADV8003 Hardware Manual Rev B August 2013 371 Figure 149 ADV8003 Schematic Page 9...
Page 372: ...ADV8003 Hardware Manual Rev B August 2013 372 Figure 150 ADV8003 Schematic Page 10...
Page 373: ...ADV8003 Hardware Manual Rev B August 2013 373 Figure 151 ADV8003 Schematic Page 11...
Page 374: ...ADV8003 Hardware Manual Rev B August 2013 374 Figure 152 ADV8003 Schematic Page 12...
Page 375: ...ADV8003 Hardware Manual Rev B August 2013 375 Figure 153 ADV8003 Schematic Page 13...
Page 376: ...ADV8003 Hardware Manual Rev B August 2013 376 Figure 154 ADV8003 Schematic Page 14...
Page 377: ...ADV8003 Hardware Manual Rev B August 2013 377 Figure 155 ADV8003 Schematic Page 15...
Page 378: ...ADV8003 Hardware Manual Rev B August 2013 378 Figure 156 ADV8003 Schematic Page 16...
Page 379: ...ADV8003 Hardware Manual Rev B August 2013 379 Figure 157 ADV8003 Schematic Page 17...
Page 380: ...ADV8003 Hardware Manual Rev B August 2013 380 Figure 158 ADV8003 Schematic Page 18...
Page 381: ...ADV8003 Hardware Manual Rev B August 2013 381 Figure 159 ADV8003 Schematic Page 19...
Page 382: ...ADV8003 Hardware Manual Rev B August 2013 382 Figure 160 ADV8003 Schematic Page 20...
Page 383: ...ADV8003 Hardware Manual Rev B August 2013 383 Figure 161 ADV8003 Schematic Page 21...
Page 384: ...ADV8003 Hardware Manual Rev B August 2013 384 Figure 162 ADV8003 Schematic Page 22...
Page 385: ...ADV8003 Hardware Manual Rev B August 2013 385 Figure 163 ADV8003 Schematic Page 23...
Page 386: ...ADV8003 Hardware Manual Rev B August 2013 386 Figure 164 ADV8003 Schematic Page 24...
Page 387: ...ADV8003 Hardware Manual Rev B August 2013 387 Figure 165 ADV8003 Schematic Page 25...
Page 388: ...ADV8003 Hardware Manual Rev B August 2013 388 Figure 166 ADV8003 Schematic Page 26...
Page 389: ...ADV8003 Hardware Manual Rev B August 2013 389 Figure 167 ADV8003 Schematic Page 27...
Page 390: ...ADV8003 Hardware Manual Rev B August 2013 390 Figure 168 ADV8003 Schematic Page 28...
Page 391: ...ADV8003 Hardware Manual Rev B August 2013 391 Figure 169 ADV8003 Schematic Page 29...
Page 392: ...ADV8003 Hardware Manual Rev B August 2013 392 Figure 170 ADV8003 Schematic Page 30...
Page 393: ...ADV8003 Hardware Manual Rev B August 2013 393 Figure 171 ADV8003 Schematic Page 31...
Page 395: ...ADV8003 Hardware Manual Rev B August 2013 395 Figure 173 ADV8003 Layout Page 2...
Page 396: ...ADV8003 Hardware Manual Rev B August 2013 396 Figure 174 ADV8003 Layout Page 3...
Page 397: ...ADV8003 Hardware Manual Rev B August 2013 397 Figure 175 ADV8003 Layout Page 4...
Page 398: ...ADV8003 Hardware Manual Rev B August 2013 398 Figure 176 ADV8003 Layout Page 5...
Page 399: ...ADV8003 Hardware Manual Rev B August 2013 399 Figure 177 ADV8003 Layout Page 6...
Page 400: ...ADV8003 Hardware Manual Rev B August 2013 400 Figure 178 ADV8003 Layout Page 7...
Page 401: ...ADV8003 Hardware Manual Rev B August 2013 401 Figure 179 ADV8003 Layout Page 8...
Page 427: ...ADV8003 Hardware Manual Rev B August 2013 427 P 2 Z Z Z P 1 Z Z Z P 0 Z Z Z...
