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    • 6. 发明授权
    • Method and apparatus for reducing the amount of data required to
represent a video frame
    • 用于减少表示视频帧所需的数据量的方法和装置
    • US5592299A
    • 1997-01-07
    • US311811
    • 1994-09-26
    • Jill M. BoyceFrank A. LaneLarry Pearlstein
    • Jill M. BoyceFrank A. LaneLarry Pearlstein
    • H04N5/783H04N7/26H04N7/46H04N9/804H04N5/76H04N5/78H04N9/79
    • H04N9/8042H04N19/40H04N19/537H04N19/577H04N9/8045H04N5/783
    • Methods and apparatus for processing digital video data to reduce the amount of video data required to represent a video frame by representing a frame or pair of field pictures into a single field of a pair of field picture are described. To prevent the second field of the field picture from being displayed a DSM byte associated with the field picture is set so that only the field representing the video frame is displayed. In accordance with the present invention, a field, e.g., a transparent predictively coded field is used as the field picture which is not displayed. In this manner, very little data is required to represent the field picture that is not displayed. When the received frames are represented as pairs of field pictures a single field of the pair of field pictures is selected to represent the video frame with the other field picture being replaced with a field which requires very little data. When frame pictures are received one of a plurality of numerous described methods of mapping frame pictures into a single field of a pair of field pictures are used to convert the frame picture into a single field of a pair of field pictures. A plurality of methods for reducing the amount of data required to represent the single field of the pair of field pictures are also described.
    • 描述了通过将一帧或一对场图像表示成一对场图像的单个场来处理数字视频数据以减少表示视频帧所需的视频数据量的方法和装置。 为了防止场图像的第二场被显示,设置与场图像相关联的DSM字节,使得仅显示表示视频帧的场。 根据本发明,使用例如透明预测编码字段的字段作为不显示的场图像。 以这种方式,需要非常少的数据来表示不显示的场图像。 当接收到的帧被表示为场图像对时,选择一对场图像对中的单个场来表示视频帧,而另一个场图像被替换为需要非常少的数据的场。 当帧图像被接收时,将帧图像映射到一对场图像的单个场中的多种众所周知的方法之一用于将帧图像转换成一对场图像的单个场。 还描述了用于减少表示一对场图像的单个场所需的数据量的多种方法。