STV3550B STMicroelectronics, STV3550B Datasheet - Page 24
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STV3550B
Manufacturer Part Number
STV3550B
Description
Manufacturer
STMicroelectronics
Datasheet
1.STV3550B.pdf
(145 pages)
Specifications of STV3550B
Operating Temperature (min)
0C
Operating Temperature (max)
70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / Rohs Status
Compliant
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Video function description
3.2.3
3.3
24/145
Video display pipeline
Regulation modes
The regulation modes of the input and output dataflows are based on the configurations of
several blocks such as the SDIN, VTG, Display, and also depends on the selected
synchronization modes.
These regulation modes are then managed by a software layer that controls the various
registers and includes algorithms to maintain the balance between the input and output
dataflows. This service software layer allows various regulation modes as described below,
selectable at the application level.
When the VTG block is set in slave mode, the PLL that line-locks the clock pixel to the Hsync
signal is used to regulate the input and output dataflows.
When the VTG block is set in master mode, the following regulation modes are possible:
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The video display block includes all the processing required for adapting the incoming video
stream to the selected display format. Depending on the up-conversion mode, this block
generates the correct video sequence with the selected number of pixels per line, lines per
field or fields per second. It uses high-resolution horizontal and vertical polyphase filters to
interpolate the additional pixels and lines required for the selected display format. These
filters are also used for zoom-in and zoom-out rescaling.
It also includes picture improvement algorithms (PSI/CTI) to provide the picture with a more
“high-resolution” aspect.
Frame Skip and Repeat Mode (used for Proscan mode)
In this mode, depending on the speed variations between the input flow and the output
flow, a frame is repeated or skipped from time to time (1 to 2 per second)
Field Skip and Repeat Mode (used for field rate up-conversion as 100 Hz)
In this mode, depending on the speed variations between the input flow and the output
flow, a field is repeated or skipped from time to time (1 to 2 per second)
Line Skip and Repeat Mode
In this mode, certain lines are repeated or skipped during the VBI, depending on the
delay between the input and output Vsync signals
Pixel Skip and Repeat Mode
In this mode; pixel periods are repeated or skipped during the horizontal or vertical
blanking interval, depending on the delay between each Vsync signal
STV3550
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