CAJ | 학술논문

为了进一步提高视频的压缩比，提出了一种基于小波变换的新型帧内模式预测快速选择算法。该算法利用小波变换后的低频子图结合改进后的 Pan 算法作帧内模式选择，由此判断宏块中每个4×4子块可能的预测模式。实验结果表明，该方法在保证了视频图像良好效果的情况下，H.264/AVC 帧内编码速度得到显著提高。
위료진일보제고시빈적압축비，제출료일충기우소파변환적신형정내모식예측쾌속선택산법。해산법이용소파변환후적저빈자도결합개진후적 Pan 산법작정내모식선택，유차판단굉괴중매개4×4자괴가능적예측모식。실험결과표명，해방법재보증료시빈도상량호효과적정황하，H.264/AVC 정내편마속도득도현저제고。
Aiming at increasing impressing ratio , a fast selection algorithm of intra-frame mode prediction based on wavelet is implemented . Firstly , an improved method of Pan is proposed on the basis of analyzing Pan algorithm . Then , intra-frame mode pre-diction is executed by improved Pan in wavelet domain . The experimental results show that the speed of intra-code is improved significantly when the quality of video is kept .