视频编解码技术简介：过去、现在及将来

【实例简介】
http://blog.csdn.net/jing_xian/article/details/53192332
视频编解码标准发展历史 Page 3 视频编解码标准 目的 ◆降低视频存储及传输数据量 ◆保证设备、软件之间的互联互通 基本框架:混合编码架构(预测+变换+量化+熵编码) X T Reorder Entro encode ( current ME MC Inter [reference or 2 previous P encoded frames Choose Intra Intra predIction/ prediction ntra UF Filter reconstructed Page 4 视频编解码标准发展历史 ●路线图 ◆H.261(1990) ◆MPEG2P2/H262(1994) ◆H263(1995~1998) ◆MPEG4P2(2000 ◆AVC(MPEG4P10)/H264(2003),AVS1(2006) ◆HEVC/H.265(2013),AVS2(2016) Page 5 视频编解码标准发展历史(2) o H 261: The first standard for hybird video coding approach ◆ Intra picture Inter picture -integer motion compensation ◆ Transform ◆ Quantization ◆ Entropy coding Page 6 视频编解码标准发展历史(3) ●MPEG2/H.262 Half-sample precision for motion compensation ◆B-pr rediction picture B picture Motion vector predictor(using left MB's MV as the predictor) Intra /inter block selection in P picture ◆ ntra dC prediction ◆8x8 transform ◆2 D run-evel Vlc Page 7 视频编解码标准发展历史(4) ●H.263 Component-wise median of the motion vectors of three neighboring blocks ◆3Drun-eve|VLC ◆|ntra8x8 block OBMC-Overlapped block Motion Compensation Page 8 视频编解码标准发展历史(5) ●H.263+ Intra block AC coefficients prediction a specialized quantization and vlc for intra coefficients Multiple reference for motion compensation Deblocking filter -applied inside the motion compensation loop Page 9 视频编解码标准发展历史(6) ●MPEG4-P2 ◆16×16,8X8 coding block structure Quarter-sample precision for motion compensation Single reference picture for motion compensation ◆ No in-loop filter Global motion compensation Page 10 【实例截图】
【核心代码】