A Low Complexity Algorithm for H.264/AVC Intra Prediction

Li H., Li J., Shokouh G. S., SAMET R.

International Conference on Cyberworlds (CW), Yokohama, Japonya, 21 - 23 Ekim 2013, ss.77-81 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1109/cw.2013.10
  • Basıldığı Şehir: Yokohama
  • Basıldığı Ülke: Japonya
  • Sayfa Sayıları: ss.77-81
  • Anahtar Kelimeler: H.264/AVC, intra prediction, fast mode decision, dual threshold
  • Ankara Üniversitesi Adresli: Evet

Özet

Intra prediction plays an important role in H.264/AVC. To reduce the complexity of the intra prediction of H.264/AVC, this paper proposes an efficient intra prediction algorithm. First, we determine if a macro block (MB) is flat or detailed rich by comparing its texture feature with dual thresholds criterion. Then, the flat MBs will be encoded in Intra_16x16 mode and those relatively rich MBs are encoded in Intra_4x4 mode. Second, an efficient Intra_4x4 mode selection algorithm is also proposed to reduce the number of candidates of intra prediction modes. The experimental results show that the encoding time of I-frame is reduced by an average of 30%, and both the increment in output bit rate and decrement in Peak Signal-to-Noise Ratio (PSNR) are negligible.