Predicting zero coefficients for High Efficiency Video Coding

Hanli Wang, Han Du, Jun Wu

Abstract: Similar to previous video coding standards, transform and quantization are used in the most recent video coding standard High Efficiency Video Coding (HEVC) and a large number of transform coefficients are quantized to zeros. In order to reduce the computations involved in transform and quantization in HEVC, a prediction approach based on Gaussian model is proposed to predict zero quantized transform coefficients within the 4 × 4, 8 × 8, 16 × 16 and 32 × 32 blocks. Extensive experiments demonstrate that the proposed algorithm is able to effectively predict zero coefficients and thus reduce redundant computations while keeping the video quality and compression efficiency almost intact.