Altera Video and Image Processing Suite User Manual
Page 33
The CVI IP cores extract any ancillary packets from the Y channel during the vertical blanking. Ancillary
packets are not extracted from the horizontal blanking.
• Clocked Video Input IP core—The extracted packets are produced through the CVI IP cores’ Avalon-
ST output with a packet type of 13 (0xD).
• Clocked Video Input II IP core— The extracted packets are stored in a RAM in the IP core, which can
be read via the control interface.
The extracted packets are produced through the CVI IP cores’ Avalon-ST output with a packet type of 13
(0xD).
For information about Avalon-ST Video ancillary data packets, refer to
2-19.
Separate Synchronization Format
The separate synchronization format uses separate signals to indicate the blanking, sync, and field
information.
The CVO IP cores create horizontal and vertical syncs and field information through their own signals.
The CVO IP cores create a sample for each clock cycle on the
vid_data
bus. The
vid_datavalid
signal
indicates when the
vid_data
video output is in an active picture period of the frame.
Table 2-2: Clocked Video Input and Output Signals for Separate Synchronization Format Video
Signal Name
Description
vid_h_sync
When 1, the video is in a horizontal synchronization period.
vid_v_sync
When 1, the video is in a vertical synchronization period.
vid_f
When 1, the video is interlaced and in field 1. When 0, the video is
either progressive or interlaced and in field 0.
vid_h
When 1, the video is in a horizontal blanking period, (only for Clocked
Video Output IP core).
vid_v
When 1, the video is in a vertical blanking period, (only for Clocked
Video Output IP core).
vid_de
When asserted, the video is in an active picture period (not horizontal
or vertical blanking).
Note: Only for Clocked Video Input IP cores.
vid_datavalid
When asserted, the video is in an active picture period (not horizontal
or vertical blanking).
Note: Only for Clocked Video Output IP cores.
2-6
Video Formats
UG-VIPSUITE
2015.05.04
Altera Corporation
Interfaces