8/17/2019 Video Accelerator
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VIDEO ACCELERATOR
Digital video is a computationally intensive task, so it
is well suited to
acceleration. Motion estimation engines are used in real-time
search engines; we
may want to have one attached to our personal computer to
experiment with video
processing techniques.
Algorithm and Requirements
We could build an accelerator or any number o digital
video algorithms. We
will choose block motion estimation as our example here because
it is very
computation and memory intensive but it is relatively easy to
explain. !lock
motion estimation is used in digital video compression
algorithms so that one
rame in the video can be described in terms o the dierences
between it and
another rame. !ecause ob"ects in the rame oten move relatively
little, describing
one rame in terms o another greatly reduces the number o bits
required to
describe the video.
#igure $. Block motion estimation.
