16x16 Integer cosine transform for HD video coding

High-Definition (HD) videos often contain rich details as well as large homogeneous regions. To exploit such a property, Variable Block-size Transforms (VBT) should be in place so that transform block size can adapt to local activities. In this paper, we propose a 16x16 Integer Cosine Transform (ICT) for HD video coding, which is simple and efficient. This 16x16 ICT is integrated into the AVS Zengqiang Profile and used adaptively as an alternative to the 8x8 ICT. Experimental results show that 16x16 transform can be a very efficient coding tool especially for HD video coding.