Digital signal huffman coding with division of frequency sub-bands
    1.
    发明授权
    Digital signal huffman coding with division of frequency sub-bands 有权
    数字信号huffman编码,分频频率子带

    公开(公告)号:US06215422B1

    公开(公告)日:2001-04-10

    申请号:US09129913

    申请日:1998-08-06

    IPC分类号: H03M734

    摘要: The invention proposes a digital signal coding method including a step of analysing (E1) the digital signal (IM) into a plurality of frequency sub-band signals distributed according to at least two different frequency bands, at least one first sub-band signal having a lower frequency and at least one second sub-band signal having a higher frequency, characterised in that it includes, for each second sub-band signal, the steps of: dividing (E4) the second sub-band signals into blocks (Bi,n), selecting (E9) blocks to be coded by setting to a predetermined value, according to a selection criterion, coding the blocks selected by setting to the predetermined value.

    摘要翻译: 本发明提出了一种数字信号编码方法,包括以下步骤:(E1)将数字信号(IM)分解为根据至少两个不同频带分配的多个频率子带信号,至少一个第一子带信号具有 具有较高频率的较低频率和至少一个第二子带信号,其特征在于,对于每个第二子带信号,其包括以下步骤:将所述第二子带信号划分成(B, n),根据选择标准,通过设置为预定值来选择(E9)要被编码的块,将通过设置选择的块编码为预定值。

    Methods and devices for processing data and notably for compressing and decompressing images
    2.
    发明授权
    Methods and devices for processing data and notably for compressing and decompressing images 失效
    用于处理数据的方法和设备,特别是用于压缩和解压缩图像的方法和设备

    公开(公告)号:US06498866B2

    公开(公告)日:2002-12-24

    申请号:US09138646

    申请日:1998-08-24

    IPC分类号: G06K936

    CPC分类号: H04N19/99 H04N19/98

    摘要: According to the invention, the method of primary processing of a first set of primary data (IM,f) representing physical quantities includes: a set division step (200A to 202) during which the first set of data is divided into sub-sets of first data, and for each first sub-set of data: a step (205 to 207) of “constructing” a global contractive mapping of the first type, for the said first sub-set of data, whose fixed point constitutes an approximation of all or part of this sub-set. The set of parameters (ai, b) thus determined constitutes a primary representation of the said first set of data.

    摘要翻译: 根据本发明,表示物理量的第一组主要数据(IM,f)的主要处理方法包括:设定分割步骤(200A至202),其中第一组数据被划分为子集 第一数据和每个第一子数据集合:对于所述第一数据子集,其“固定点”构成所有第一子集的近似值,“构造”第一类型的全局收缩映射的步骤(205至207) 或该子集的一部分。 由此确定的参数集合(ai,b)构成所述第一组数据的主要表示。

    Method and device for the processing of data notably the compression and decompression of image data
    3.
    发明授权
    Method and device for the processing of data notably the compression and decompression of image data 失效
    用于处理数据的方法和设备,特别是图像数据的压缩和解压缩

    公开(公告)号:US06266451B1

    公开(公告)日:2001-07-24

    申请号:US09046602

    申请日:1998-03-24

    IPC分类号: G06K936

    CPC分类号: H04N19/99

    摘要: The method for primary processing according to the invention takes into account a minimum dimension and a partition of a set of data into so-called “initial elementary” subsets (Ki). It includes: a) for each elementary subset which size is larger than the minimum dimension, one iteration of: a division suitability estimation step, and when appropriate, a step of “supplementary partitioning” of the said subset, b) a “construction” step of a global multidimensional mapping and non-linear mapping, the restrictions of the global mapping to the elementary subsets (Ki) being composed of elementary mappings, the fixed point of the global mapping constituting an approximation of all or part of this set, the set of parameters (ai, b) determined by the restrictions constituting an approximation of the said set of data.

    摘要翻译: 根据本发明的主要处理方法考虑到一组数据的最小尺寸和分割成所谓的“初始基本”子集(Ki),其包括:a)对于每个大小大于 最小维度,一次迭代:分割适用性估计步骤,并且在适当的情况下,对所述子集进行“补充划分”的步骤,b)全局多维映射和非线性映射的“构造”步骤, 基本子集(Ki)的全局映射由基本映射组成,全局映射的固定点构成该集合的全部或部分的近似值,由构成近似值的限制确定的参数集合(ai,b) 的所述数据集。

    Methods and devices for processing a set of data
    4.
    发明授权
    Methods and devices for processing a set of data 失效
    用于处理一组数据的方法和设备

    公开(公告)号:US06456743B1

    公开(公告)日:2002-09-24

    申请号:US08921379

    申请日:1997-08-29

    IPC分类号: G06K936

    CPC分类号: G06T9/001

    摘要: A method and device that operates in accordance with the method are provided for primary processing a set of data (IM, f) representing physical quantities. The method comprises a step of constructing a global contractive mapping of a first type for the set of data, the fixed point of which constitutes an approximation of all or part of this set. At least one mapping belonging to the group of mappings consisting of multi-dimensional mappings and non-linear mappings is employed to construct the global contractive mapping. A next step includes determining parameters (ai, b) of the global contractive mapping so as to allow the use of a method of successive approximations converging towards the fixed point of the global contractive mapping. The determined set of parameters (ai, b) constitutes a primary representation of the set of data.

    摘要翻译: 提供根据该方法操作的方法和装置,用于对表示物理量的一组数据(IM,f)进行主处理。 该方法包括对于该组数据构建第一类型的全局收缩映射的步骤,其固定点构成该集合的全部或部分的近似值。 采用属于由多维映射和非线性映射组成的映射组的至少一个映射来构建全局收缩映射。 下一步包括确定全局收缩映射的参数(ai,b),以便允许使用逐渐逼近的方法朝向全局收缩映射的固定点收敛。 确定的参数集合(ai,b)构成数据集的主要表示。

    Digital image progressive transmission
    5.
    发明授权
    Digital image progressive transmission 失效
    数字图像逐行传输

    公开(公告)号:US5978517A

    公开(公告)日:1999-11-02

    申请号:US877837

    申请日:1997-06-16

    摘要: In order to progressively transmit a digital image (IM), a method for coding the image comprises the division (E1) of the image into vectors (V.sub.m,n), the selection (E2) of a code vector (VC.sub.d) associated with an index (A.sub.d) for each of the image vectors, and the replacement (E2) of the image vectors by the indices associated with the selected code vectors, in order to produce a plane of indices (PI) representing the image. The method comprises the steps of sub-sampling (E3) the plane of indices (PI) into sub-planes of indices (SPI.sub.1 to SPI.sub.F) respectively comprising indices selected from the plane of indices, and ordering (E4) the sub-planes of indices according to a predetermined order before transmitting them.

    摘要翻译: 为了逐步发送数字图像(IM),用于对图像进行编码的方法包括将图像划分为向量(Vm,n),将与图像相关联的代码矢量(VCd)的选择(E2) 用于每个图像向量的索引(Ad)和与所选择的代码向量相关联的索引的图像向量的替换(E2),以便产生表示该图像的索引平面(PI)。 该方法包括以下步骤:将索引平面(PI)分别采样(E3)成索引(SPI1至SPIF)的子平面,分别包括从索引平面中选择的索引,并排序(E4)子平面 在发送之前按照预定顺序进行索引。