公开(公告)号：EP1005233A1

公开(公告)日：2000-05-31

申请号：EP98830599.1

申请日：1998-10-12

Applicant: STMicroelectronics S.r.l.

Inventor： Bagni, Daniele ,  De Bei, Mattia ,  Mian, Gian Antonio ,  Sacchi, Maria Luisa

IPC: H04N7/50

CPC classification number: H04N19/174 ,  H04N19/115 ,  H04N19/126 ,  H04N19/137 ,  H04N19/14 ,  H04N19/147 ,  H04N19/152 ,  H04N19/172 ,  H04N19/176 ,  H04N19/61

Abstract: An algorithm based on a pre-analysis of just few slices (GOS) of the current whole picture and/or on a mix of information on the pre-analysis of a slice of the preceding picture and on the actual encoding data of the preceding whole picture is able to implement an efficient constant bit-rate (BR) control with a reduced requisite of buffer memory capacity and a proportionally less costly hardware.
The pre-analysis may be carried out by precoding the GOS with a constant reference quantizer or by entropy computation and the local control of the bit-rate is implemented by way of an integrative-proportional controller.

Abstract translation: 基于对当前整个图像的仅几个切片（GOS）的预分析和/或关于前一图像的切片的预分析的信息的混合以及前一整体的实际编码数据的算法 图像能够实现有效的恒定比特率（BR）控制，减少了缓冲存储器容量的要求，并且成本较低的硬件。 可以通过用恒定的参考量化器预处理GOS或通过熵计算来进行预分析，并且通过积分比例控制器来实现比特率的本地控制。