公开(公告)号：US5612748A

公开(公告)日：1997-03-18

申请号：US469425

申请日：1995-06-06

申请人： Seiichi Gohshi ,  Yoshinori Izumi ,  Masahide Naemura ,  Kouichi Yamaguchi

发明人： Seiichi Gohshi ,  Yoshinori Izumi ,  Masahide Naemura ,  Kouichi Yamaguchi

IPC分类号： H04N7/015 ,  H04N7/12 ,  H04N11/04 ,  H04N11/24 ,  H04N7/24

CPC分类号： H04N11/006 ,  H04N11/048 ,  H04N7/0152 ,  H04N7/122

摘要： In the case where a wide-band color picture signal provided for a high-definition television broadcasting is sub-sampled for narrow-band transmission, in comparison with a stationary picture signal which is applied with sub-sampling according to a sampling pattern circulated at every two frames, the color picture signal in motional picture regions, which is conventionally applied with line-offset sub-sampling at every field, has a lowered resolution. To improve the resolution concerned, color difference signals in motional picture regions are applied with inter-field offset sub-sampling together with band-limitation for preventing aliasing distortion accompanied with subsampling and signal processing including interpolation for reproduction, which are effected in a form completed at every frame. As for motional picture regions having small motion, a luminance signal is applied also with similar sub-sampling and similar signal processing. As a result, the overall picture quality of the reproduced motional color picture is improve by signal processing thus adapted for color pictures in motional picture regions.

摘要翻译： 在为高频电视广播提供的宽带彩色图像信号被子采样以用于窄带传输的情况下，与根据在 每两帧通常在每个场应用线偏移次采样的运动图像区域中的彩色图像信号具有降低的分辨率。 为了提高相关分辨率，运动图像区域中的色差信号与带限制一起应用场间偏移子采样，以防止伴随二次采样的信号失真和包括用于再现的内插的信号处理，其以完成的形式 在每一帧。 对于具有小运动的运动图像区域，也应用相似的次采样和类似的信号处理的亮度信号。 结果，再现的运动彩色图像的整体图像质量通过适用于运动图像区域中的彩色图像的信号处理而得到改善。