Shape-Adaptive DCT Algorithm — Hardware Optimized Redesign
This article refers to the shape-adaptive DCT ( SA-DCT ) algorithm developed by Sikora and Makai in 1995. It is an important tool for encoding texture of arbitrary shaped video objects and can be included in MPEG-4 video codecs. In this paper a modification of normalized version SA-DCT redesigned for intraframe coding is presented. Simulations results show that this solution outperforms standard SA-DCT in rate-distortion sense. Efficiency is close to improved version SA-DCT for intraframe coding, known as ΔDC-SA-DCT. But computational overhead is smaller than for ΔDC-SA-DCT. Therefore, this solution may be attractive for hardware implementations.
Keywordsshape-adaptive DCT hardware design
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