Filter
Top Products
H.264 Motion Estimation Engine www.xilinx.com 25
UG453 (v1.1) April 23, 2008
Verification Notes
R
The command line in the batch script invokes the following processes in this order:
1. A DOS window is spawned.
2. A Perl script (MotionEstimation_Verification.pl) is called, which sets up the
required test(s) in order with the appropriate parameters.
This Perl script calls functions in the general-purpose test bench support module that
runs the reference code:
\Software\ArchC_Rev3\bin\lencod.exe
3. The executable uses the video sequences in \InputSequences as input.
4. This code generates the stimulus files:
\Verification\MotionEstimation\Level1\Testxx\stimuli\MotionEstimation_
...in.txt
…and the expected output reference file:
\Verification\MotionEstimation\Level1\Testxx\
MotionEstimation_...out.x
5. ModelSim is then called in batch mode (no GUI is invoked with the release) which
generates the HW simulation output file:
\Verification\MotionEstimation\Level1\Testxx\
MotionEstimation_...out.txt
6. This file is then compared to the reference output file generated previously and a DOS
report given. The results are also summarized in:
\Verification\MotionEstimation\
EncoderVerification_Summary_Level1.txt
Note:
The whole process takes some time. For QCIF (176 x 144), it should take at least a 15
minutes to run two frames on a modern laptop. This time increases for tests that bring extra
complexity into the stimulus generation, for example, formats with increased frame size, main
and high profile settings, etc.
Verification Notes
When test number is set to 0 in the batch script file, all tests are run in sequence from 1 to
10. When doing this, by default, all tests are run regardless of whether they have been run
in the past. If some tests have already been run, but some others have not been run or their
results deleted, then the user may wish to run only the remaining tests. The user can do
this by editing the MotionEstimation_Verification.pl script, commenting out the
line:
$ForceRegenerateAll = "1";
Use ‘#’ to comment).
Also, if you want to take this approach, but rerun one or some tests selectively, delete the
test directory of the test(s) you want to rerun:
MotionEstimation\Level1\testxx
and rerun the script.