Altera Video and Image Processing Suite User Manual
Page 37
Parameter Values
IP Cores
Frame Width/
Height
Interlaced/
Progressive
Bits per Color
Sample
Color Pattern
Interlacer
Run-time
controlled
Progressive;
interlaced data is
either discarded
or propagated
without change
in parameter
editor
User-defined—
through
parameter editor
One, two or three
channels in sequence
or parallel.
Test Pattern Generator User-defined—
through
parameter editor
or run-time
controlled
User-defined—
through
parameter editor
User-defined—
through
parameter editor
One, two or three
channels in sequence
or parallel.
Test Pattern Generator
II
User-defined—
through
parameter editor
or run-time
controlled
User-defined—
through
parameter editor
User-defined—
through
parameter editor
RGB 4:4:4 or YCbCr
4:4:4, 4:2:2 or 4:2:0 in
parallel or sequence.
Packets
The packets of the Avalon-ST Video protocol are split into symbols—each symbol represents a single
piece of data. For all packet types on a particular Avalon-ST interface, the number of symbols sent in
parallel (that is, on one clock cycle) and the bit width of all symbols is fixed. The symbol bit width and
number of symbols sent in parallel defines the structure of the packets.
The functions predefine the following three types of packet:
• Video data packets containing only uncompressed video data
• Control data packets containing the control data configure the cores for incoming video data packets
• Ancillary (non-video) data packets containing ancillary packets from the vertical blanking period of a
video frame
Another seven packet types are reserved for users, and five packet types reserved for future definition by
Altera.
The packet type is defined by a 4-bit packet type identifier. This type identifier is the first value of any
packet. It is the symbol in the least significant bits of the interface. Functions do not use any symbols in
parallel with the type identifier.
Table 2-4: Avalon-ST Video Packet Types
Type Identifier
Description
0
Video data packet
1–8
User packet types
9–12
Reserved for future Altera use
2-10
Avalon-ST Video Protocol
UG-VIPSUITE
2015.05.04
Altera Corporation
Interfaces