公开(公告)号：US6144771A

公开(公告)日：2000-11-07

申请号：US884440

申请日：1997-06-27

申请人： Weiping Li ,  Shipeng Li ,  Hangqiao Sun

发明人： Weiping Li ,  Shipeng Li ,  Hangqiao Sun

IPC分类号： G06T9/00 ,  G06K9/36

CPC分类号： G06T9/005

摘要： A method is disclosed for adaptive entropy coding and decoding of a stream of indices representative of information, including the following steps: establishing, at both an encoder and a decoder, respective coding tables to have codes corresponding to indices; finding, in the encoder table, codes corresponding to indices of the stream of indices, and sending the found codes to the decoder for recovery of the indices corresponding to the sent codes; determining an overall frequency of occurrence of individual indices in the stream of indices; determining a measure of how currently individual indices have occurred in the stream of indices; and adaptively modifying the encoder and decoder tables in accordance with the measure of how currently individual indices have occurred and the frequency of occurrence.

摘要翻译： 公开了一种表示信息的索引的自适应熵编码和解码的方法，包括以下步骤：在编码器和解码器处建立各自的编码表以具有对应于索引的代码; 在编码器表中找出对应于索引流的索引的代码，并将找到的代码发送到解码器以恢复与发送的代码相对应的索引; 确定指标流中个体指数的总体出现频率; 确定在指数流中如何发生个别指数的衡量指标; 并根据当前各个指标的发生方式和发生频率的度量自适应地修改编码器和解码器表。

公开(公告)号：US06654499B2

公开(公告)日：2003-11-25

申请号：US10160628

申请日：2002-06-03

申请人： Weiping Li ,  Shipeng Li ,  Hangqiao Sun

发明人： Weiping Li ,  Shipeng Li ,  Hangqiao Sun

IPC分类号： G06K936

CPC分类号： G06T9/005

摘要： A method of encoding and decoding an image includes the following steps: subsampling the image to obtain a plural number of subsampled frames of spatially offset image-representative signals; transforming each of the subsampled frames to obtain a corresponding number of frames of transform coefficient-representative signals; forming vector-representative signals from corresponding coefficient-representative signals of the respective frames of coefficient-representative signals; transforming the vector-representative signals; quantizing the transformed vector-representative signals to obtain encoded signals; transmitting the encoded signals; receiving the transmitted encoded signals; and decoding the encoded signals to obtain a recovered version of the image.

摘要翻译： 一种对图像进行编码和解码的方法包括以下步骤：对图像进行二次采样以获得空间偏移图像代表信号的多个子采样帧; 变换每个子采样帧以获得相应数量的变换系数代表信号的帧; 从系数代表信号的各个帧的相应系数代表信号形成向量代表信号; 转换向量代表信号; 量化变换的矢量代表信号以获得编码信号; 发送编码信号; 接收发送的编码信号; 并对编码的信号进行解码以获得图像的恢复版本。

公开(公告)号：US06400847B1

公开(公告)日：2002-06-04

申请号：US09645240

申请日：2000-08-24

申请人： Weiping Li ,  Shipeng Li ,  Hangqiao Sun

发明人： Weiping Li ,  Shipeng Li ,  Hangqiao Sun

IPC分类号： G06K936

CPC分类号： G06T9/005

摘要： A method for decoding an encoded signal that includes an encoded control portion and an encoded video portion, includes the following steps: providing a plurality of inverse transform functions; decoding the encoded signal to recover the control portion; selecting one of the inverse transform functions in accordance with the recovered control portion; and decoding encoded video portion with the selected inverse transform function.

摘要翻译： 一种用于对包括编码控制部分和编码视频部分的编码信号进行解码的方法包括以下步骤：提供多个逆变换函数; 解码编码信号以恢复控制部分; 根据恢复的控制部分选择逆变换功能之一; 以及使用所选择的逆变换函数解码编码视频部分。