Altera Video and Image Processing Suite - Manual (Page 32)

Clocked Video Output IP Cores
For the embedded synchronization format, the CVO IP cores insert the horizontal and vertical syncs and
field into the data stream during the horizontal blanking period.
The IP cores create a sample for each clock cycle on the
vid_data
bus.
There are two extra signals only used when connecting to the SDI IP core. They are
vid_trs
, which is
high during the 3FF sample of the TRS, and
vid_ln
, which produces the current SDI line number. These
are used by the SDI IP core to insert line numbers and cyclical redundancy checks (CRC) into the SDI
stream as specified in the 1.5 Gbps HD SDI and 3 Gbps SDI standards.
The CVO IP cores insert any ancillary packets (packets with a type of 13 or 0xD) into the output video
during the vertical blanking. The IP cores begin inserting the packets on the lines specified in its
parameters or mode registers (
ModeN Ancillary Line
and
ModeN F0 Ancillary Line
). The CVO IP
cores stop inserting the packets at the end of the vertical blanking.
Clocked Video Input IP Cores
The CVI IP cores support both 8 and 10-bit TRS and XYZ words. When in 10-bit mode, the IP cores
ignore the bottom 2 bits of the TRS and XYZ words to allow easy transition from an 8-bit system.
Table 2-1: XYZ Word Format
The XYZ word contains the synchronization information and the relevant bits of its format.
Bits 10-bit 8-bit Description
Unused
[5:0] [3:0] These bits are not inspected by the CVI IP cores.
H (sync)
6 4 When 1, the video is in a horizontal blanking period.
V (sync)
7 5 When 1, the video is in a vertical blanking period.
F (field)
8 6 When 1, the video is interlaced and in field 1. When 0,
the video is either progressive or interlaced and in field
0.
Unused
9 7 These bits are not inspected by the CVI IP cores.
For the embedded synchronization format, the
vid_datavalid
signal indicates a valid BT656 or BT1120
sample. The CVI IP cores only read the
vid_data
signal when
vid_datavalid
is 1.
Figure 2-5: Vid_datavalid Timing
D0 D1 vid_data
vid_datavalid
UG-VIPSUITE
2015.05.04
Video Formats 2-5
Interfaces Altera Corporation
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