Quantisation and scan order of multidimensional ICT coefficients for multidimensional vector matrix codec

Abstract

This paper proposes a technique for generating the quantisation cube and an improved zigzag scanning method suitable to multidimensional vector matrix DCT integer transform (MD-VMICT) codec after studying the statistical properties of the DC and AC coefficients. An e-exponential function is used to quantisation and it is verified to two-exponential function in order to easily carrying out by shift operator. After determining the proper parameter by experiments, the proposed quantisation and scan order are tested on various standard test video sequences. The experiments show the wide adaptability. Also the comparisons are carried out with the literature and MPEG-4, whose experiment results show superiority than the literature and MPEG-4. The comparisons between MD-VMICT and H.264/AVC show potential advantages at low bit rate with high activities sequences.

Keywords:

• video coding
• quantisation
• scan order
• multidimensional vector matrix DCT integer transform
• H.264/AVC
• integer transform

This work is supported by the National Science Foundation of China under grant nos. 609111301281, 60702036 and 60832002. Also this research is supported by Technology Development Project of Jilin Province (no. 20090302). We deeply appreciate the reviewers’ sound advice.