Performance optimization of the MPEG-2 to MPEG-4 video transcoder

@inproceedings{spie03-kalva-performance, abstract = {The MPEG-2 compressed digital video content is being used in a number of products including the DVDs, Camcorders, digital TV, and HDTV. The ability to access this widely available MPEG-2 content on low-power end-user devices such as PDAs and mobile phones depends on effective techniques for transcoding the MPEG-2 content to a more appropriate, low bitrate, video format such as MPEG-4. In this paper we present the software and algorithmic optimizations performed in developing a real time MPEG-2 to MPEG-4 video transcoder. A brief overview of the transcoding architectures is also provided. The details of the transcoding architectures for MPEG-2 to MPEG-4 video transcoding can be found in. The transcoder was targeted and optimized for Windows PCs with the Intel Pentium-4 processors. The optimizations performed exploit the SIMD parallelism offered by the Intel Pentium-4 processors. The transcoder consists of two distinct components: the MPEG-2 video decoder and the MPEG-4 video transcoder. The MPEG-2 video decoder is based on the MPEG-2 Software Simulation Group"s reference implementation while MPEG-4 transcoder is developed from scratch with portions taken from the MOMUSYS implementation of the MPEG-4 video encoder. The optimizations include: 1) generic block-processing optimizations that affected both the MPEG-2 decoder and the MPEG-4 transcoder and 2) optimizations specific to the MPEG-2 video decoder and the MPEG-4 video transcoder. The optimizations resulted in significant improvements both in MPEG-2 decoding as well as the MPEG-4 transcoding. With optimizations, the total time spent by the transcoder was reduced by over 82\% with MPEG-2 decoding reduced by over 56\% and MPEG-4 transcoding reduced by over 86\%.}, author = {Kalva, H. and Vetro, A. and Sun, H. }, booktitle = {VLSI Circuits and Systems. Edited by Lopez, Jose Fco.; Montiel-Nelson, Juan A.; Pavlidis, Dimitris. Proceedings of the SPIE, Volume 5117, pp. 341-350 (2003).}, citeulike-article-id = {2743496}, doi = {10.1117/12.498998}, keywords = {transcoding}, month = {April}, pages = {341--350}, posted-at = {2008-05-01 22:54:07}, priority = {4}, series = {Presented at the Society of Photo-Optical Instrumentation Engineers (SPIE) Conference}, title = {Performance optimization of the MPEG-2 to MPEG-4 video transcoder}, url = {http://dx.doi.org/10.1117/12.498998}, volume = {5117}, year = {2003} }

TY - CONF ID - spie03-kalva-performance L3 - citeulike-article-id:2743496 TI - Performance optimization of the MPEG-2 to MPEG-4 video transcoder T2 - VLSI Circuits and Systems. Edited by Lopez, Jose Fco.; Montiel-Nelson, Juan A.; Pavlidis, Dimitris. Proceedings of the SPIE, Volume 5117, pp. 341-350 (2003). SE - Presented at the Society of Photo-Optical Instrumentation Engineers (SPIE) Conference VL - 5117 SP - 341 EP - 350 N2 - The MPEG-2 compressed digital video content is being used in a number of products including the DVDs, Camcorders, digital TV, and HDTV. The ability to access this widely available MPEG-2 content on low-power end-user devices such as PDAs and mobile phones depends on effective techniques for transcoding the MPEG-2 content to a more appropriate, low bitrate, video format such as MPEG-4. In this paper we present the software and algorithmic optimizations performed in developing a real time MPEG-2 to MPEG-4 video transcoder. A brief overview of the transcoding architectures is also provided. The details of the transcoding architectures for MPEG-2 to MPEG-4 video transcoding can be found in. The transcoder was targeted and optimized for Windows PCs with the Intel Pentium-4 processors. The optimizations performed exploit the SIMD parallelism offered by the Intel Pentium-4 processors. The transcoder consists of two distinct components: the MPEG-2 video decoder and the MPEG-4 video transcoder. The MPEG-2 video decoder is based on the MPEG-2 Software Simulation Group"s reference implementation while MPEG-4 transcoder is developed from scratch with portions taken from the MOMUSYS implementation of the MPEG-4 video encoder. The optimizations include: 1) generic block-processing optimizations that affected both the MPEG-2 decoder and the MPEG-4 transcoder and 2) optimizations specific to the MPEG-2 video decoder and the MPEG-4 video transcoder. The optimizations resulted in significant improvements both in MPEG-2 decoding as well as the MPEG-4 transcoding. With optimizations, the total time spent by the transcoder was reduced by over 82% with MPEG-2 decoding reduced by over 56% and MPEG-4 transcoding reduced by over 86%. KW - transcoding AU - Kalva, H AU - Vetro, A AU - Sun, H PY - 2003/April// UR - http://dx.doi.org/10.1117/12.498998 ER -