Electrical and Computer Engineering
2332 Main Mall
Vancouver,
BC
Canada
V6T 1Z4
Tel +1.604.822.2872
Fax +1.604.822.5949
Email:
info@ece.ubc.ca
| Title | Fast block size prediction for MPEG-2 to H.264/AVC transcoding |
| Publication Type | Conference Paper |
| Year of Publication | 2008 |
| Authors | Tang, Q., P. Nasiopoulos, and R. Ward |
| Conference Name | Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on |
| Pagination | 1029 -1032 |
| Date Published | mar. |
| Keywords | block size partitioning, block size prediction, computational complexity, data compression, discrete cosine transforms, H.264 compression ratio, H.264 motion vectors, H.264/AVC transcoding, image segmentation, motion estimation, motion re-estimation, MPEG-2 DCT coefficients, performance evaluations, rate-distortion performance, video coding, video transcoding scheme |
| Abstract | One objective in MPEG-2 to H.264 transcoding is to improve the H.264 compression ratio by using more accurate H.264 motion vectors. Motion re-estimation is by far the most time consuming process in video transcoding, and improving the searching speed is a challenging problem. We introduce a new transcoding scheme that uses the MPEG-2 DCT coefficients to predict the block size partitioning for H.264. Performance evaluations have shown that, for the same rate-distortion performance, our proposed scheme achieves an impressive reduction in the computational complexity of more than 82% compared to the full range motion estimation used by H.264. |
| URL | http://dx.doi.org/10.1109/ICASSP.2008.4517788 |
| DOI | 10.1109/ICASSP.2008.4517788 |