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92. 发明公开

EP1279292A2 RATE CONTROL AND BUFFER PROTECTION FOR VARIABLE BIT RATE VIDEO PROGRAMS OVER A CONSTANT RATE CHANNEL 审中-实审转让
标题翻译： RATENSTEUERUNG UND PUFFERSCHUTZFÜRVIDEOPROGRAMME MIT VARIABLER BITRATEÜBEREINEN KANAL MIT KONSTANTER RATE
公开(公告)号：EP1279292A2
公开(公告)日：2003-01-29
申请号：EP01969065.0
申请日：2001-04-11
申请人： General Instrument Corporation
发明人： WANG, Limin
IPC分类号： H04N7/26
CPC分类号： H04N21/23655 , H04N19/114 , H04N19/115 , H04N19/124 , H04N19/152 , H04N19/172 , H04N19/177 , H04N19/61 , H04N21/2365 , H04N21/2401
摘要： A system for rate control and buffer management during coding of multiple variable bit rate digital video programs over a constant bit rate channel. The system is suitable for use in a hierarchical bit allocation scheme that includes a super group of pictures (GOP) level, a super frame level, and a frame level. For each super GOP with a length N frames, for each video program, the transmission rate for the current frame is set according to an average number of compressed bits for at least N previous frames, including a frame starting at N'+N-1 frames before the current frame, a frame ending at N' frames before the current frame, and intermediate frames therebetween. N' is a decoding delay of a modeled decoder that receives a respective video program. Moreover, the transmission rates of future frames are pre-set so that the average input rate of each individual video stream to the respective decoder buffer is equal to the average output rate, and the total transmission rate of programs is equal to the channel rate.
摘要翻译：用于在恒定比特率信道上编码多个可变比特率数字视频节目期间的速率控制和缓冲器管理的系统。该系统适用于包括超级图像组（GOP）级别，超级帧级别和帧级别的分层比特分配方案。对于每个具有长度为N帧的超级GOP，对于每个视频节目，根据至少N个先前帧的平均压缩比数来设置当前帧的传输速率，包括从N'+ N-1开始的帧在当前帧之前的帧，在当前帧之前以N'帧结束的帧以及它们之间的中间帧。 N'是接收相应视频节目的建模解码器的解码延迟。此外，未来帧的传输速率是预设的，使得到各个解码器缓冲器的每个单独视频流的平均输入速率等于平均输出速率，并且程序的总传输速率等于信道速率。

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