A SWITCHED MODEL-BASED CODER FOR VIDEO SIGNALS

被引：18

作者：

CHOWDHURY, MF ^{[1
]}

CLARK, AF ^{[1
]}

DOWNTON, AC ^{[1
]}

MORIMATSU, E ^{[1
]}

PEARSON, DE ^{[1
]}

机构：

[1] FUJITSU LABS LTD,NAKAHARA KU,KAWASAKI,KANAGAWA 211,JAPAN

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY | 1994年 / 4卷 / 03期

关键词：

Algorithms - Image coding - Image quality - Mathematical models - Mathematical transformations - Parameter estimation - Switching - Television picture quality - Television transmission - Three dimensional - Visual communication;

D O I：

10.1109/76.305867

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The algorithmic architecture and performance of a video coder are described that switches between model-based and and H.261 modes, depending on image content. The switching criterion incorporates measures of both picture quality and bit rate. The model-based mode uses generalized cylindrical models and a 3D matching technique to estimate motion. The coder was tested with four different image sequences in CBR and VBR operational modes: the performance was generally superior, and in some cases significantly superior, to that of a free-running H.261 coder operating on the same sequences. The switched architecture represents a possible route for the integration of model-based coding with H.261 to give improved performance at very low bit rates.

引用

页码：216 / 227

页数：12

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