【摘要】 尽管 Internet带宽巨大 ,但网络的信息量、用户数量更是庞大的 ,其拥塞情况是随机的。图像信号在 Internet上根据网络拥塞情况进行分层传输与接收是一件有意义的研究工作。当网络处于正常状态时 ,实时传输高清晰度图像 ,当网络拥塞情况较严重时 ,主动丢弃增强层信号仅恢复基本层图像信号。本文从三个方面探讨了小波变换结合子带编码的Internet图像传输的计算机模拟 ,首先分别介绍小波变换、子带编码的各自特点 ,接着介绍 Internet图像传输的特点 ,最后给出计算机模拟的实验。更多还原

【Abstract】 The number of information and user is huge in Internet,the congest unexpect to occur randomly in it.It is a very important studying task to transport image signal in layer manner according to the congest in Internet. High definition image signal is transported in time while internet is being a normal situation.Accordingly,intensive image signal is discarded actively and just basic image signal is transported while Internet has severe congest. Image transmission in Internet has been simulated by the computer in terms of wavelet transformation combining with subband coding by three aspects.Fristly, properties of the wavelet transformation and subband coding is introduced respectively,the result also is given by the computer simulating.更多还原