Enhanced low bitrate H.264 video coding using decoder-side super-resolution and frame interpolation
Yükleniyor...
Dosyalar
Tarih
2013-07
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
SPIE-SOC Photo-Optical Instrumentation Engineers
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Advanced inter-prediction modes are introduced recently in literature to improve video coding performances of both H.264 and High Efficiency Video Coding standards. Decoder-side motion analysis and motion vector derivation are proposed to reduce coding costs of motion information. Here, 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 is developed to decide for each MB which of the two reconstructions to use as skip/direct mode prediction. Simulations indicate an average of 1.04 dB peak signal-to-noise ratio (PSNR) improvement or 23.0% bitrate reduction at low bitrates when compared with H.264 standard. The PSNR gains reach as high as 3.00 dB for inter-predicted frames and 3.78 dB when only B-frames are considered. Decoded videos exhibit significantly better visual quality as well.
Açıklama
Anahtar Kelimeler
H.264 video coding, Low bitrate, Super-resolution, Frame interpolation, Predictor Selection, Motion
Kaynak
Optical Engineering
WoS Q Değeri
Q4
Scopus Q Değeri
Cilt
52
Sayı
7
Künye
Ateş, H. F. (2013). Enhanced low bitrate H.264 video coding using decoder-side super-resolution and frame interpolation. Optical Engineering, 52(7), 1-13. doi:10.1117/1.OE.52.7.071505
