Title :
A realtime software MPEG transcoder using a novel motion vector reuse and a SIMD optimization techniques
Author :
Senda, Yuzo ; Harasaki, Hidenobu
Author_Institution :
C&C Media Res. Labs., NEC Corp., Kawasaki, Japan
Abstract :
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
Keywords :
data compression; optimisation; parallel architectures; real-time systems; video coding; video on demand; MPEG-1 bitstream; SIMD optimization techniques; mean absolute error approximation criteria; motion vector reuse; quality; realtime software MPEG transcoder; scaled motion vectors; Bit rate; Broadcasting; Costs; Decoding; Discrete cosine transforms; Encoding; Hardware; Multimedia communication; Software systems; Transcoding;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1999. Proceedings., 1999 IEEE International Conference on
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-5041-3
DOI :
10.1109/ICASSP.1999.758412
