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    Block-wise adaptive statistical data compressor
    3.
    发明授权
    Block-wise adaptive statistical data compressor 失效
    块式自适应统计数据压缩器

    公开(公告)号：US6075470A

    公开(公告)日：2000-06-13

    申请号：US31418

    申请日：1998-02-26

    申请人： Herb A. Little ,  Hugh R. Hind

    发明人： Herb A. Little ,  Hugh R. Hind

    IPC分类号： H03M7/30 ,  H03M7/40 ,  H03M7/46 ,  H03M7/00

    CPC分类号： H03M7/40 ,  H03M7/3086 ,  H03M7/46

    摘要： A block-wise adaptive statistical data compressor is disclosed that operates by replacing characters in a data block with super-character codewords comprising a variable length prefix and a fixed length index. The codewords are determined by treating a plurality of groups of characters as super-character groups and then adapting the codewords, for each data block, based upon the actual frequency of occurrence of the characters in each group. The super-character prefix value identifies the group to which a particular character belongs, and the index value identifies the individual character of the group. By grouping and indexing the characters into these super-character groups, the present invention models a particular data block using a fraction of the information generally required by a fixed statistical compressor. Also disclosed are multi-stage lossless block data compressors that include the block-wise adaptive statistical compressor and also include a clustering stage and a reordering stage. The clustering stage clusters like characters into similar locations within the data block, and the reordering stage reorders the data to generate an expected skew in the frequency distribution of characters in the data block so that the block can be more efficiently compressed by the block-wise adaptive statistical compressor.

    摘要翻译： 公开了一种块式自适应统计数据压缩器，其通过用包括可变长度前缀和固定长度索引的超字符码字替换数据块中的字符来操作。 通过将多个字符组视为超字符组来确定码字，然后根据每个组中的字符的实际发生频率对每个数据块调整码字。 超字符前缀值标识特定字符所属的组，索引值标识组的单个字符。 通过将字符分组和索引到这些超级字符组中，本发明使用固定统计压缩器通常需要的信息的一部分来模拟特定数据块。 还公开了包括块自适应统计压缩器并且还包括聚类阶段和重新排序阶段的多级无损块数据压缩器。 聚类阶段将字符集合到数据块内的类似位置，并且重新排序阶段重新排序数据以在数据块中的字符的频率分布中产生期望的偏移，使得可以通过块方式更有效地压缩该块 自适应统计压缩机。

    Network Selection Methods And Apparatus With Home Network Prioritization After Network Signal Recovery Or Power-On
    4.
    发明申请
    Network Selection Methods And Apparatus With Home Network Prioritization After Network Signal Recovery Or Power-On 有权
    网络信号恢复或上电后的家庭网络优先级的网络选择方法和装置

    公开(公告)号：US20110021190A1

    公开(公告)日：2011-01-27

    申请号：US12897527

    申请日：2010-10-04

    申请人： Jayasri Gunaratnam ,  Noushad S. Naqvi ,  Bryan Taylor ,  Craig Ian Haight Swann ,  Hugh R. Hind ,  Bao Quoc Nguyen ,  Darcy Richard Phipps

    发明人： Jayasri Gunaratnam ,  Noushad S. Naqvi ,  Bryan Taylor ,  Craig Ian Haight Swann ,  Hugh R. Hind ,  Bao Quoc Nguyen ,  Darcy Richard Phipps

    IPC分类号： H04W4/00

    CPC分类号： H04W28/12 ,  H04W8/183 ,  H04W48/18 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/144

    摘要： A network selection method for a mobile station which is associated with a Home Public Land Mobile Network (HPLMN) identified by a home Mobile Network Code (MNC) and Mobile Country Code (MCC) pair. The mobile station identifies a plurality of PLMNs in a geographic area, and selects a non-home PLMN identified by a non-home MNC/MCC pair and designated as a Registered PLMN (RPLMN). In response to regaining signal coverage from an out-of-coverage condition with the RPLMN, or being powered-on from a power-off state entered while operating with the RPLMN, the mobile station selects the HPLMN if the HPLMN identified by the home MNC/MCC pair is available. Otherwise, if the HPLMN is unavailable and the RPLMN identified by the non-home MNC/MCC pair is available, the mobile station selects the RPLMN. However, if the RPLMN is unavailable, the mobile station selects an alternate PLMN in accordance with an automatic or manual network selection method.

    摘要翻译： 一种与家庭移动网络代码（MNC）和移动国家代码（MCC）对识别的归属公共陆地移动网络（HPLMN）相关联的移动站的网络选择方法。 移动站识别地理区域中的多个PLMN，并且选择由非归属MNC / MCC对标识并被指定为注册PLMN（RPLMN）的非归属PLMN。 响应于从RPLMN的覆盖不完整状态恢复信号覆盖，或者在使用RPLMN操作时从输入的电源关闭状态接通电源，如果由家庭MNC识别的HPLMN，则移动台选择HPLMN / MCC对可用。 否则，如果HPLMN不可用，并且由非归属MNC / MCC对标识的RPLMN可用，则移动台选择RPLMN。 然而，如果RPLMN不可用，则移动台根据自动或手动网络选择方法选择备用PLMN。