公开(公告)号：US6058241A

公开(公告)日：2000-05-02

申请号：US943378

申请日：1997-10-03

申请人： Makoto Kawamura ,  Yasushi Fujinami ,  Jun Yonemitsu ,  Tomihiro Nakagawa

发明人： Makoto Kawamura ,  Yasushi Fujinami ,  Jun Yonemitsu ,  Tomihiro Nakagawa

IPC分类号： H04N5/92 ,  G11B20/10 ,  H03M7/36 ,  H04N5/783 ,  H04N5/85 ,  H04N9/804 ,  H04N9/877 ,  H04N5/76

CPC分类号： H04N5/783 ,  H04N5/85 ,  H04N9/8042 ,  H04N9/877

摘要： Encoded data is reversely reproduced by decoding each picture only once and using only as many frame memory sections as are needed in a normal playback operation. A picture header detector detects a picture header from data read out from a video code buffer to identify the type of picture The picture type information controls a picture data selecting circuit for selecting frames of I and P pictures equal in number to the number of frame memory sections in a frame memory bank. The selected frames are supplied to an inverse VLC circuit to be decoded, starting at the head of a GOP with an I picture. The decoded I and P pictures are stored in the frame memory bank and transmitted to a display unit, starting with the temporally most recent picture and reading backward.

摘要翻译： 通过仅对一个图像进行解码而仅使用与正常播放操作中所需的帧存储器部分相同的编码数据。 图像标题检测器从从视频代码缓冲器读出的数据中检测图像标题，以识别图像的类型图像类型信息控制图像数据选择电路，用于选择与帧存储器数量相等的I和P图像的帧数 帧存储器中的部分。 所选择的帧被提供给要被解码的逆VLC电路，从具有I图像的GOP的头开始。 解码的I和P图像被存储在帧存储器中并被发送到显示单元，从时间上最新的图像开始并向后读。