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Super-resolution based coding approach for H.264 standard

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1 Author(s)
Ates, H.F. ; Elektrik-Elektron. Muhendisligi Bolumu, Isik Univ., İstanbul, Turkey

In literature video coding efficiency of H.264 standard has been improved using decoder-side super-resolution (SR). In this paper SR estimation is used during encoding in place of skip/direct mode prediction of H.264 standard and coding performance is optimized. First P- and B-frames are downsampled and H.264 encoded at lower resolution (LR). Then reconstructed LR frames are super-resolved using decoder-side motion estimation. Also bicubic interpolation of the LR frame is used as an alternative to SR reconstruction. A rate-distortion optimal mode selection algorithm determines for each macroblock which of the two reconstructions to use as skip/direct mode prediction. Simulations indicate an average of 1.36 dB PSNR improvement or 30.3% bitrate reduction at low bitrates when compared to H.264 standard. Average PSNR gains reach as high as 3.63 dB depending on the video content.

Published in:

Signal Processing and Communications Applications Conference (SIU), 2013 21st

Date of Conference:

24-26 April 2013