
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 Ancillary Data Packets on page
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
Send Feedback
Komentáře k této Příručce