3-1 雑音除去およびグラデーション保存を考慮した階調削減と階調復元を用いた超高精細映像符号化の検討(第3部門画像符号化)

抄録

We propose an ultrahigh definition video coding method with bit-depth reduction before encoding procedure and bit-depth reconstruction after decoding procedure. The bit-depth reduction uses Lloyd-Max quantization with image noise reduction and gradation preservation. The bit-depth reconstruction uses side information which is determined by comparing a local-decoded bit-depth reconstructed image with the original image in encoder side.