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1. 发明授权

US5646694A Moving picture decoding apparatus having three line buffers controlled to store and provide picture data of different resolutions 失效
标题翻译：具有三个行缓冲器的运动图像解码装置被控制以存储和提供不同分辨率的图像数据
公开(公告)号：US5646694A
公开(公告)日：1997-07-08
申请号：US554966
申请日：1995-11-13
申请人： Kojiro Horita , Junichi Kimura , Hirotaka Hara , Yutaka Okunoki
发明人： Kojiro Horita , Junichi Kimura , Hirotaka Hara , Yutaka Okunoki
IPC分类号： H04N19/00 , G06T3/40 , G06T9/00 , G09G5/42 , H03M7/00 , H04N5/46 , H04N19/423 , H04N19/426 , H04N7/01
CPC分类号： G09G5/42 , H04N5/46 , H04N7/0122
摘要： A picture decoding apparatus has a memory for storing decoded picture data, three line buffers for temporarily storing picture data read from the memory, and a line buffer controller. Two of the three line buffers are selected sequentially and cyclically, and their operation modes are changed over to the writing mode, and decoded picture data read from the memory is stored sequentially in the two line buffers. The two line buffers are changed over from the writing mode to the reading mode sequentially and cyclically in the same order as that in which the two line buffers selected sequentially and cyclically were changed over to the writing mode, and data for one line is read sequentially from the two line buffers. While an earlier-selected one of the selected two line buffers is changed over to the reading mode and picture data for the former half of one line stored in the line buffer is read out therefrom, the remaining line buffer is changed over to the writing mode and picture data for the former half of a subsequent one line is stored therein. While a later-selected one of the two selected line buffers is changed over to the reading mode and picture data for the latter half of the said one line stored therein is read out therefrom, the earlier-selected line buffer is changed over to the writing mode and picture data for the latter half of the subsequent line is stored therein.
摘要翻译：图像解码装置具有用于存储解码图像数据的存储器，用于临时存储从存储器读取的图像数据的三行缓冲器和行缓冲器控制器。三个行缓冲器中的两个被顺序地和周期性地选择，并且它们的操作模式被切换到写入模式，并且从存储器读取的解码图像数据顺序存储在两个行缓冲器中。两行缓冲器按顺序依次循环地从写入模式切换到读取模式，并且顺序地循环地按顺序选择两个行缓冲器循环地切换到写入模式，并且顺序地读取一行的数据从两行缓冲区。虽然选择的两行缓冲器中的较早选择的一个被切换到读取模式，并且从存储在行缓冲器中的一行的前一半的图像数据被读出，但是剩余的行缓冲器被切换到写入模式并存储其后一行的前半部分的图像数据。虽然两个所选行缓冲器中的稍后选择的一个被改变到读取模式，并且从其中读出存储在其中的所述一行的后半部分的图像数据，但是较早选择的行缓冲器被切换到写入后续行的后半部分的模式和图像数据被存储在其中。

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