Title :
Fast mode decision and motion estimation for H.264 with a focus on MPEG-2/H.264 transcoding
Author :
Lu, Xiaoan ; Tourapis, Alexis Michael ; Yin, Peng ; Boyce, Jill
Author_Institution :
Dept. of Electr. Eng., Polytech. Univ. Brooklyn, NY, USA
Abstract :
The H.264 standard achieves much higher coding efficiency than previous video coding standards, due to its improved inter and intra prediction modes which come with a cost of higher computational complexity. When transcoding to H.264 from MPEG-2, motion information from MPEG-2 can be used to speed up the motion search. Fast mode decision algorithms are proposed for B and P frames, and a fast intra prediction algorithm is developed for intra coding. In addition, fast motion estimation is developed by reusing the motion information from MPEG-2. Simulation results demonstrate that we can achieve significant complexity reduction while maintaining the coding efficiency.
Keywords :
computational complexity; decision theory; motion estimation; prediction theory; transcoding; video coding; MPEG-2 H.264 transcoding; coding efficiency; computational complexity reduction; intra coding; mode decision; motion estimation; motion information; prediction modes; video coding standards; Bit rate; Computational efficiency; Costs; Encoding; Motion estimation; Partitioning algorithms; Prediction algorithms; Testing; Transcoding; Video coding;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1464820