IPS-VIDEO Altera, IPS-VIDEO Datasheet - Page 149

• Manufacturer Part Number: IPS-VIDEO
• Description: MegaCore Suite W/ 17 DSP Video/image Processing Functions
• Manufacturer: Altera
• Type: -r

Specifications of IPS-VIDEO

• Software Application: IP CORE, SUITES
• Supported Families: Arria GX, Cyclone II, HardCopy II, Stratix II
• Core Architecture: FPGA
• Core Sub-architecture: Arria, Cyclone, Stratix
• Rohs Compliant: NA
• Function: Suite of IP Functions for Video and Image Processing
• License: Initial License
• Lead Free Status / RoHS Status: na
• Lead Free Status / RoHS Status: na

Chapter 5: Functional Descriptions
Stall Behavior and Error Recovery
January 2011 Altera Corporation
Clipper
Clocked Video Input
Clocked Video Output
Color Plane Sequencer
Error Recovery
On receiving an early endofpacket signal, the Chroma Resampler stalls its input but
continues writing data until it has sent an entire frame. If it does not receive an
endofpacket signal at the end of a frame, the Chroma Resampler discards data until
the end of packet is found.
The Clipper MegaCore function stalls for a few cycles between lines and between
frames. Its internal latency is less than 10 cycles. During the processing of a line, it
reads continuously but the Clipper only writes when inside the active picture area as
defined by the clipping window.
Error Recovery
On receiving an early endofpacket signal, the Clipper stalls its input but continues
writing data until it has sent an entire frame. If it does not receive an endofpacket
signal at the end of a frame, the Clipper discards data until the end-of-packet is found.
The stall behavior of the Clocked Video Input MegaCore function is dictated by the
incoming video. If its output FIFO is empty, during horizontal and vertical blanking
periods the Clocked Video Input does not output any video data.
Error Recovery
If an overflow is caused by a downstream core failing to receive data at the rate of the
incoming video, the Clocked Video Input MegaCore function sends an early end of
packet and restart sending video data at the start of the next frame or field.
Once its input FIFO is full, the stall behavior of the Clocked Video Output MegaCore
function is dictated by the outgoing video. During horizontal and vertical blanking
periods it stalls and does not take in any more video data.
Error Recovery
If the Clocked Video Output MegaCore receives an early end of packet it will re-
synchronize the outgoing video to the incoming video data on the next start of packet
it receives. If the Clocked Video Output MegaCore receives a late start of packet it will
re-synchronize the outgoing video data to the incoming video immediately. Note that
when Genlock functionality is enabled the Clocked Video Output MegaCore does not
re-synchronize to the incoming video.
The Color Plane Sequencer MegaCore function stalls for approximately 10 cycles after
processing each line of a video frame. Between frames the MegaCore function stalls
for approximately 30 cycles.
Video and Image Processing Suite User Guide
5–69