All-zero block detection algorithm based on quantitative parameters

Song, Guoji; Jiang, Xinyu

doi:10.1109/icssem.2012.6340868

2012 3rd International Conference on System Science, Engineering Design and Manufacturing Informatization 2012

DOI: 10.1109/icssem.2012.6340868

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All-zero block detection algorithm based on quantitative parameters

Guoji Song

Xinyu Jiang

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2018

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Hybrid All Zero Soft Quantized Block Detection for HEVC

Cui

Xiong

Zhang

et al. 2018

IEEE Trans. on Image Process.

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Transform and quantization account for a considerable amount of computation time in video encoding process. However, there are a large number of discrete cosine transform coefficients which are finally quantized into zeros. In essence, blocks with all zero quantized coefficients do not transmit any information, but still occupy substantial unnecessary computational resources. As such, detecting all-zero block (AZB) before transform and quantization has been recognized to be an efficient approach to speed up the encoding process. Instead of considering the hard-decision quantization (HDQ) only, in this paper, we incorporate the properties of soft-decision quantization into the AZB detection. In particular, we categorize the AZB blocks into genuine AZBs (G-AZB) and pseudo AZBs (P-AZBs) to distinguish their origins. For G-AZBs directly generated from HDQ, the sum of absolute transformed difference-based approach is adopted for early termination. Regarding the classification of P-AZBs which are generated in the sense of rate-distortion optimization, the rate-distortion models established based on transform coefficients together with the adaptive searching of the maximum transform coefficient are jointly employed for the discrimination. Experimental results show that our algorithm can achieve up to 24.16% transform and quantization time-savings with less than 0.06% RD performance loss. The total encoder time saving is about 5.18% on average with the maximum value up to 9.12%. Moreover, the detection accuracy of larger TU sizes, such as and can reach to 95% on average.

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Hybrid All Zero Soft Quantized Block Detection for HEVC

Cui

Xiong

Zhang

et al. 2018

IEEE Trans. on Image Process.

View full text Add to dashboard Cite

show abstract

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All-zero block detection algorithm based on quantitative parameters

Cited by 1 publication

References 2 publications

Hybrid All Zero Soft Quantized Block Detection for HEVC

Hybrid All Zero Soft Quantized Block Detection for HEVC

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