Decoder-side super-resolution and frame interpolation for improved H.264 video coding
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Dosyalar
Tarih
2013
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
IEEE
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In literature decoder-side motion estimation is shown to improve video coding efficiency of both H.264 and HEVC standards. In this paper we introduce enhanced skip and direct modes for H.264 coding using decoder-side super-resolution (SR) and frame interpolation. 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. Alternatively for B-frames, bidirectional true motion estimation is performed to synthesize a B-frame from its reference frames. For P-frames, bicubic interpolation of the LR frame is used as an alternative to SR reconstruction. A rate-distortion optimal mode selection algorithm determines for each MB which of the two reconstructions to use as skip/direct mode prediction. Simulations indicate an average of 1.04 dB PSNR improvement or 23.0% bitrate reduction at low bitrates when compared to H.264 standard. Average PSNR gains reach as high as 3.95 dB depending on the video content and frame rate.
Açıklama
Anahtar Kelimeler
Accuracy, Bit rate, Decoding, Encoding, Estimation, Interpolation, Standards, B frame, H.264 standard, HEVC standard, LR frame reconstruction, P frame, PSNR, SR reconstruction, Bicubic interpolation, Bidirectional true motion estimation, Decoder side motion estimation, Decoder side super resolution, Direct mode, Downsampling, Frame interpolation, High efficiency video coding, Lower resolution, Rate distortion optimal mode selection algorithm, Skip mode, Video content, H.264 video coding, Low bitrate, Super-resolution, Code standards, Image reconstruction, Image resolution, Motion estimation, Rate distortion theory, Video coding
Kaynak
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Cilt
Sayı
Künye
Ateş, H. F. (2013). Decoder-side super-resolution and frame interpolation for improved H.264 video coding. Paper presented at the 83-92. doi:10.1109/DCC.2013.16
