Standard compliant flicker reduction method with PSNR loss control

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Ieee - The Institute Of Electrical And Electronics Engineers, Inc
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Flicker is a common video coding artifact that occurs especially at low and medium bit rates. In this paper we propose a temporal filter-based method to reduce flicker. The proposed method has been designed to be compliant with conventional video coding standards, i.e., to generate a bitstream that is decodable by any standard decoder implementation. The aim of the proposed method is to make the luminance changes between consecutive frames smoother on a block-by-block basis. To this end, a selective temporal low-pass filtering is proposed that smooths these luminance changes on flicker-prone blocks. Furthermore, since the low-pass filtering can incur in a noticeable blurring effect, an adaptive algorithm that allows for limiting the PSNR loss -and thus the blur-has also been designed. The proposed method has been extensively assessed on the reference software of the H.264/AVC video coding standard and compared to a state-of-the-art method. The experimental results show the effectiveness of the proposed method and prove that its performance is superior to that of the state-of-the-art method.
Proceedings: EEE International Conference on Acoustics, Speech and Signal Processing (ICASSP2013). Vancouver, Canada, May 26-31, 2013
Block codes, Decoding, Flicker noise, Image restoration, Losses, Low-pass filters, Video coding, Flicker, Temporal filtering, H.264
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2013 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013): Proceedings. (pp. 1729 - 1733). IEEE.