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Transform and quantization are adopted in HEVC. There are lots of all zero coefficient blocks in transform and quantization. By detecting all zero coefficient blocks, the complexity of transform or quantization can be greatly reduced. All zero coefficient blocks for uniform quantizer can be efficiently detected by comparing the float quantization level of the estimated coefficients with an explicit threshold. The experimental result shows that 50% complexity of transform or quantization for uniform quantizer can be reduced with negligible loss of video coding efficiency.
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