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Improved Prediction via Thresholding Transform Coefficients

Citation Author(s):
Michael Schäfer, Jonathan Pfaff, Jennifer Rasch, Tobias Hinz, Heiko Schwarz, Tung Nguyen, Gerhard Tech, Detlev Marpe, Thomas Wiegand
Submitted by:
Michael Schaefer
Last updated:
8 October 2018 - 6:53am
Document Type:
Poster
Document Year:
2018
Event:
Presenters:
Michael Schaefer
Paper Code:
2223
Categories:
 

This work presents a thresholding method for processing the predicted samples in the state-of-the-art High Efficiency Video Coding (HEVC) standard. The method applies an integer-based approximation of the discrete cosine transform to an extended prediction block and sets transform coefficients beneath a certain threshold to zero. Transforming back into the sample domain yields the improved prediction signal. The method is incorporated into a software implementation that is conforming to the HEVC standard and applies to both intra and inter predictions. Consequently, bit-rate savings ranging from 2.3% to 8.0% have been measured in terms of the Bjøntegaard-Delta bit rate (BD-rate).

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