公开(公告)号：US20010021220A1

公开(公告)日：2001-09-13

申请号：US09124674

申请日：1998-07-29

Applicant: U.S. PHILIPS CORPORATION

Inventor： ETIENNE FERT ,  DANIEL KAISER

IPC: H04B001/66 ,  H04N007/12

CPC classification number: H04N19/87 ,  H04N19/114 ,  H04N19/142 ,  H04N19/146 ,  H04N19/149 ,  H04N19/15 ,  H04N19/152 ,  H04N19/172 ,  H04N19/177 ,  H04N19/179 ,  H04N19/192 ,  H04N19/61

Abstract: The variable bitrate coding method according to the invention comprises an iterative process including a first analysis pass and a second prediction pass. The analysis pass allows for a picture coding of a sequence with a constant quantization stepsize (and quality) and the prediction pass allows for a matching of the stepsize to the wanted target bitrate. After some iterations, a last step allows for a finer adjustment of said stepsize with respect to said target bitrate.

Abstract translation: 根据本发明的可变比特率编码方法包括包括第一分析遍和第二预测遍的迭代处理。 分析通过允许具有恒定量化步长（和质量）的序列的图像编码，并且预测通过允许步长与所需目标比特率的匹配。 在一些迭代之后，最后一步允许相对于所述目标比特率对所述步长进行更精细的调整。