IPS-VIDEO Altera, IPS-VIDEO Datasheet - Page 115
IPS-VIDEO
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
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Chapter 5: Functional Descriptions
Color Space Converter
January 2011 Altera Corporation
1. Result Scaling. You can choose to scale up the results, increasing their range. This
2. Removal of Fractional Bits. If any fractional bits exist, you can choose to remove
3. Conversion from Signed to Unsigned. If any negative numbers can exist in the
4. Constrain to Range. If any of the results are beyond the range specified by the
The Color Space Converter MegaCore function can process streams of pixel data of
the types shown
Table 5–17. Color Space Converter Avalon-ST Video Protocol Parameters
Frame Width
Frame Height
Interlaced / Progressive
Bits per Color Sample
Color Pattern
Notes to
(1) For channels in parallel, the top of the color pattern matrix represents the MSB of data and the bottom represents
is useful to quickly increase the color depth of the output. The available options
are a shift of the binary point right –16 to +16 places. This is implemented as a
simple shift operation so it does not require multipliers.
them. There are three methods:
■
■
■
results and the output type is unsigned, you can choose how they are converted.
There are two methods:
■
■
output data type (output guard bands, or if unspecified the minimum and
maximum values allowed by the output bits per pixel), logic that saturates the
results to the minimum and maximum output values is automatically added.
the LSB. For details, refer to
Parameter
Truncate to integer. Fractional bits are removed from the data. This is
equivalent to rounding towards negative infinity.
Round - Half up. Round up to the nearest integer. If the fractional bits equal
0.5, rounding is towards positive infinity.
Round - Half even. Round to the nearest integer. If the fractional bits equal 0.5,
rounding is towards the nearest even integer.
Saturate to the minimum output value (constraining to range).
Replace negative numbers with their absolute positive value.
Table
5–17:
(1)
inTable
Read from control packets at run time.
Read from control packets at run time.
Either.
Number of bits per color sample selected in the parameter editor.
For color planes in sequence:
For color planes in parallel:
5–17.
“Avalon-ST Video Protocol” on page
4–2.
Value
Video and Image Processing Suite User Guide
0
1
2
1
0
2
5–35
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