Converting AVS coefficients to H.264/AVC transform coefficients

The AVS video coding schemes, which is developed by China, uses a different transform (ICT) than before. The recently completed video coding standard, H.264/AVC, also uses an integer transform, (HT). In this paper, we propose an efficient method to convert ICT coefficients to HT coefficients entirely in the transform domain. We show that the conversion is essentially a 2D transform. We derive the transform kernel matrix and provide a fast algorithm. We show that the proposed transform domain conversion outperforms the conventional pixel domain approach. It is expected to have applications in transform domain video transcoding.