Early detection of all-zero 44 4  4 blocks in High Efficiency Video Coding
The value range of 44 4  4 quantized DCT coefficients in HEVC is analyzed. Two sufficient conditions to early detect all-zero 44 4  4 blocks in HEVC are derived. A prediction algorithm is designed to early detect all-zero 44 4  4 blocks. The proposed prediction algorithm keeps video quality and bit rates unchanged. Exhaustive experiments demonstrate the efficiency of the proposed algorithm.
early detection quantization dct hevc video quality zero coefficients fast encoding compression efficiency