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1. 发明授权

US5602594A Buffer control apparatus for compression of video intraframes 失效
标题翻译：用于压缩视频帧内的缓冲器控制装置
公开(公告)号：US5602594A
公开(公告)日：1997-02-11
申请号：US289566
申请日：1994-08-12
申请人： Sung K. Cho , Yong H. Lee , Joon P. Chang , Choon Lee
发明人： Sung K. Cho , Yong H. Lee , Joon P. Chang , Choon Lee
IPC分类号： G06T9/00 , H04N7/26 , H04N7/30 , H04N7/36
CPC分类号： H04N19/87 , H04N19/124 , H04N19/142 , H04N19/176 , H04N19/179 , H04N19/503 , H04N19/60 , H04N19/146 , H04N19/152
摘要： An apparatus for controlling a buffer adapted to transmit motion-involving video compressed by use of an intraframe compression coding technique employing discrete cosine transform and variable length coding to a constant rate channel, wherein a statistical feed-forward-based buffer control apparatus having a simple construction is combined with an existing statistical feed-back-based buffer control apparatus, thereby being capable of stably controlling a buffer even when a scene change occurs, and reducing the capacity of the buffer and the length of a tape needed. The apparatus includes an encoder for encoding input video data to be compressed, and a feed-forward-based division factor selector for receiving an output signal from the encoder, calculating the complexity of each frame based on the received signal, estimating the quantity of data to be generated by units of a predetermined number of discrete cosine transform blocks, and sending a division factor corresponding to the estimated quantity of data to the encoder.
摘要翻译：一种用于控制缓冲器的装置，其适用于通过使用对于恒定速率信道采用离散余弦变换和可变长度编码的帧内压缩编码技术来发送包含视频的视频压缩，其中基于统计前馈的缓冲器控制装置具有简单结构与现有的基于统计反馈的缓冲器控制装置组合，从而即使当场景变化发生时也能够稳定地控制缓冲器，并且减少缓冲器的容量和所需的磁带的长度。该装置包括用于编码要压缩的输入视频数据的编码器和用于从编码器接收输出信号的前馈分频因子选择器，基于接收到的信号计算每帧的复杂度，估计数据量由预定数量的离散余弦变换块的单位产生，并将与估计的数据量相对应的分频因子发送到编码器。

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