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- Title
Efficient discrete cosine transform and quantization algorithm based on eliminating redundant computations in H.264 video encoding .
- Authors
Yong Ho Moon; Se Hyeok Park; Jae Ho Kim
- Abstract
We propose a new efficient discrete cosine transform (DCT) and quantization algorithm for the H.264 encoder. We theoretically analyze integer DCT and quantization of the H.264 encoder. A theoretical analysis shows that there are redundant calculations for DCT and quantization. In the proposed algorithm, one of four methods1. DCT skip; 2. reduced DCT1; 3. reduced DCT2; 4. original DCTis selected by using the minimum SAD information obtained in the motion estimation. The reduced DCT1 and reduced DCT2 eliminate the redundant calculations required for DCT and quantization. The simulation results show that the proposed algorithm achieves an approximately 15 to 25% computational saving without video-quality degradation, compared to the conventional method. 2004 Society of Photo-Optical Instrumentation Engineers.
- Subjects
ALGORITHMS; FOUNDATIONS of arithmetic; COMPUTER programming; POLAR forms (Mathematics)
- Publication
Optical Engineering, 2004, Vol 43, Issue 12, p3142
- ISSN
0091-3286
- Publication type
Article