Intra 16$\times$16 Mode Decision Using Subset of Transform Coefficients in H.264/AVC
Sang-Hee Lim, Seong-Won Lee, Joonki Paik · Journal of the Institute of Electronics Engineers of Korea · 2007
In this paper, we significantly reduces the amount of computation for intra 1616 mode decision in H.264 by applying the fast algorithm, which obtains the transformed prediction residual with fewer computations. By extending the existing intra 44 mode decision, we propose the new algorithm for fast intra 1616 mode decision. The proposed algorithm uses partial transform coefficients which consist of one DC and three adjacent AC coefficients after 44 transform in the intra 1616 mode decision. Theoretical analysis and experimental results show that the proposed algorithm can reduce computations up to 50% in the intra 1616 mode decision process with unnoticeable degradation.