A realtime software MPEG transcoder using a novel motion vector reuse and a SIMD optimization techniques
Yuzo Senda, Hidenobu Harasaki · 1999
A realtime software MPEG transcoder has been developed. Novel motion vector reuse and SIMD optimization techniques are introduced to accelerate the transcoder without any quality degradation. Mean absolute error approximation criteria are employed in the reuse technique to refine scaled motion vectors. The developed transcoder on a Pentium II 266 MHz machine runs 2.5 times as fast as realtime, when scaling an MPEG-1 bitstream to half size.