Study on the Variable Rate Coding of Moving Image Sequence in the Next Generation Communication Network

下一代通信网络中运动图像序列的可变速率编码研究

• 批准号: 02650231
• 负责人: KATO Shigeo
• 金额: $ 1.41万
• 依托单位: Utsunomiya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650231/
• 关键词: Broadband ISDN; Variable Rate Coding; Asynchronous Transfer Mode; Packetized Video; Subband Coding; Entropy Coding; Hierarchical Coding; Arithmetic Coding; 非同期転送モ-ド

The Asynchronous Transfer Mode(ATM)is one of best methods as information transfer scheme because of its variety and availability. Over the ATM network, various types of communication connections can be realized and the network resources will be effectively used by statistical multiplexing. In moving image communication system using ATM, users can be access the network by unconstrained bit rate. so that the flame work of the coding scheme must be fundamentally changed, such that turning from constant bit rate to constant image quality should be planned.In this research, we decompose highly efficient image coding problem to two functional blocks, one is to construct coding models of images and another is to find the efficient entropy coding method.For the first question, we propose a new image coding model using a hierarchical structure based on a spatial filtering process. It can be keep picture quality to some extent by employing some technique to protect higher layer packets.For the second question, we propose a dynamic arithmetic coding method. In our method, the estimation probability of less symbol, which is one of parameters in arithmetic coding. is chosen from the values of some summations of powers of 2. The transition manner of the coding parameter is determined from both static and dynamic coding characteristics. Simulation results show that our proposed method is effective to the entropy coding method.Finally, we indicates the new types of moving image communication system based on the hierarchical coding method.

异步传输模式(ATM)因其多样性和可用性而成为信息传输方案的最佳方法之一。在ATM网络上，可以实现多种类型的通信连接，并通过统计复用有效地利用网络资源。在使用ATM的运动图像通信系统中，用户可以不受比特率限制地访问网络。因此，必须从根本上改变编码方案的框架，从恒定比特率转向恒定图像质量。在本研究中，我们将高效图像编码问题分解为两个功能块，一个是构建图像编码模型，另一个是寻找高效的熵编码方法。针对第一个问题，我们提出了一种基于空间滤波过程的分层结构的新图像编码模型。通过采用某种技术来保护高层数据包，可以在一定程度上保持图像质量。对于第二个问题，我们提出了一种动态算术编码方法。在我们的方法中，较少符号的估计概率是算术编码中的参数之一。是从2的一些幂的和的值中选择的。编码参数的转换方式是根据静态和动态编码特性来确定的。仿真结果表明我们提出的方法对于熵编码方法是有效的。最后，我们提出了基于层次编码方法的新型运动图像通信系统。

项目成果

Jiro Katto: "Variable bit-rate coding based on human visual system" Signal Processing : Image Communication. 3. 313-320 (1991)

Jiro Katto：“基于人类视觉系统的可变比特率编码”信号处理：图像通信。

Jiro KATTO: "A New Structure of the Perfect Recfect Reconstruction Filter Banks for Subーband Codig" Transaction of the IEICE. Eー73. 1616-1624 (1990)

Jiro KATTO：“子带编码的完美 RECfect 重建滤波器组的新结构”，IEICE 交易 1616-1624 (1990)。

Jiro Katto: "A New Structure of the Perfect Reconstruction Filter Banks for Subband Coding" The Transactions of IEICE. E73. 1616-1624 (1990)

Jiro Katto：“用于子带编码的完美重构滤波器组的新结构”IEICE 的交易。

Jiro Katto: "Variable bitーrate coding based on human visual system" Signal processing:Image Communication. 3. 313-320 (1991)

Jiro Katto：“基于人类视觉系统的可变比特率编码”信号处理：图像通信 3. 313-320 (1991)。

Jiro Katto: "Variable bit-rate coding based on human visual system" Signal Process. : Image Commun.3 No. 43. 313-320 (1991)

Jiro Katto：“基于人类视觉系统的可变比特率编码”信号处理。