公开(公告)号：US20020071608A1

公开(公告)日：2002-06-13

申请号：US09950479

申请日：2001-09-10

Applicant: U.S. Philips Corporation

Inventor： Etienne Fert ,  Daniel Kaiser

IPC: G06K009/36 ,  G06K009/46

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. Application: MPEG-2 encoders for storage media with limited capacity.

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。 应用：用于容量有限的存储介质的MPEG-2编码器。

公开(公告)号：US20030227970A1

公开(公告)日：2003-12-11

申请号：US09764658

申请日：2001-01-17

Applicant: U.S. Philips Corporation

Inventor： Etienne Fert ,  Daniel Kaiser

IPC: H04N007/12

CPC classification number: H04N19/87 ,  H04N19/114 ,  H04N19/142 ,  H04N19/146 ,  H04N19/149 ,  H04N19/15 ,  H04N19/152 ,  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 and followed by a last control step for adjusting said stepsize with respect to said target bitrate. According to the invention, a picture re-arrangement step is provided between the analysis and prediction steps of one iteration, in order to encode with an improved quality the picture sequence.

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，随后是用于相对于所述目标比特率调整所述步长的最后一个控制步骤。 根据本发明，在一次迭代的分析和预测步骤之间提供图像重新排列步骤，以便以改进的质量对图像序列进行编码。