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1. 发明授权

US5150119A Data compression method and apparatus 失效
标题翻译：数据压缩方法和设备
公开(公告)号：US5150119A
公开(公告)日：1992-09-22
申请号：US744443
申请日：1991-08-13
申请人： Shigeru Yoshida , Yoshiyuki Okada , Yasuhiko Nakano , Hirotaka Chiba
发明人： Shigeru Yoshida , Yoshiyuki Okada , Yasuhiko Nakano , Hirotaka Chiba
IPC分类号： G06T9/00 , H03M7/30
CPC分类号： G06T9/005 , H03M7/3088
摘要： In a data compression method based on an LZW coding procedure, a list which defines a sequence of tracing partial strings registered in a dictionary is modified so that a position of a first registered partial string among the registered partial strings in a tree structure of registered partial strings is interchanged with a position of a second registered partial string among the registered partial strings in a state where the first and second registered partial strings extend from an identical node of the tree structure.

2. 发明授权

US5136289A Dictionary searching system 失效
标题翻译：字典搜索系统
公开(公告)号：US5136289A
公开(公告)日：1992-08-04
申请号：US740912
申请日：1991-08-06
申请人： Shigeru Yoshida , Yasuhiko Nakano , Yoshiyuki Okada , Hirotaka Chiba
发明人： Shigeru Yoshida , Yasuhiko Nakano , Yoshiyuki Okada , Hirotaka Chiba
IPC分类号： G06F17/27 , H03M7/30
CPC分类号： G06F17/2735 , H03M7/3088
摘要： A dictionary searching system retrieves a character string which is described by input reference number and characters from a plurality of mutually different character strings which are registered in a dictionary in correspondence with reference numbers assigned to the character strings. The dictionary searching system includes a dictionary which is made up of an index part for storing in correspondence with the reference numbers a reference number which is assigned to one of character strings which are obtained by adding a character to the character string which is assigned the input reference number and the character which is added to the one of the character strings and a list part for storing in correspondence with the reference numbers a reference number which is assigned to one of character strings having a last character which differs from that of the character string which is assigned the input reference number and the character which is added to the one of the character strings, a reading part for initially reading information from the index part by specifying the input reference number and thereafter reading information from the list part by specifying the reference number which is read from the dictionary, a detecting part for detecting each character which matches the input characters out of characters read from the dictionary and for outputting a result of this detection as a retrieval result, and a deciding part for deciding whether or not a reference number is included in an output of the dictionary and for outputting a result of this detection as a retrieval result, where the reading part, the detecting part and the deciding part operate independently of each other.

3. 发明授权

US5254990A Method and apparatus for compression and decompression of data 失效
标题翻译：压缩和解压缩数据的方法和装置
公开(公告)号：US5254990A
公开(公告)日：1993-10-19
申请号：US3876
申请日：1993-01-11
申请人： Shigeru Yoshida , Yasuhiko Nakano , Yoshiyuki Okada , Hirotaka Chiba
发明人： Shigeru Yoshida , Yasuhiko Nakano , Yoshiyuki Okada , Hirotaka Chiba
IPC分类号： G06T9/00 , H03M7/30
CPC分类号： H03M7/3088 , G06T9/005
摘要： In a data compressing and decompressing apparatus, having improved efficiency and enhanced compression ratio whereby character sequence of received data is coded and decoded by referring to a dictionary related to the last character of the immediately preceding character sequence, and a character sequence which is one character extended character sequence of the coded and decompressed character sequence is registered in the dictionary in relation with the last character of the immediately preceding character sequence so that the compression ratio of the coding of data is increased.
摘要翻译：在数据压缩和解压缩装置中，通过参考与前一个字符序列的最后一个字符有关的字典和一个字符的字符序列，提高了效率和增强的压缩比，从而对接收到的数据的字符序列进行编码和解码编码和解压缩字符序列的扩展字符序列与前一字符序列的最后一个字符相关地登记在字典中，从而数据编码的压缩比增加。

4. 发明授权

US5138673A Data compression system 失效
标题翻译：数据压缩系统
公开(公告)号：US5138673A
公开(公告)日：1992-08-11
申请号：US565679
申请日：1990-08-09
申请人： Shigeru Yoshida , Yasuhiko Nakano , Yoshiyuki Okada , Hirotaka Chiba , Masahiro Mori
发明人： Shigeru Yoshida , Yasuhiko Nakano , Yoshiyuki Okada , Hirotaka Chiba , Masahiro Mori
IPC分类号： H04N1/413 , H04N1/417
CPC分类号： H04N1/413 , H04N1/4175
摘要： A data compression system is provided having a fixed length coding unit provided before a universal coding unit. The fixed length coding unit detects mode classifications and mode conditions of changing picture elements in a mode detecting unit. Then, the mode classifications and mode conditions are converted to fixed length code words in a code transforming unit representative of, e.g., MH, MR or MMR-type codes. Thereafter, the fixed length code words are predictively coded by the universal coding unit to output compressed data. The present invention is applicable to both character data and picture data. Preferably, the picture data is preprocessed by the fixed length coding unit before both of the character data and picture data are predictively coded by the universal coding unit.

5. 发明授权

US5717393A Apparatus for data compression and data decompression 失效
标题翻译：数据压缩和数据解压缩装置
公开(公告)号：US5717393A
公开(公告)日：1998-02-10
申请号：US684045
申请日：1996-07-19
申请人： Yasuhiko Nakano , Kimitaka Murashita , Yoshiyuki Okada , Shigeru Yoshida , Masanaga Tokuyo
发明人： Yasuhiko Nakano , Kimitaka Murashita , Yoshiyuki Okada , Shigeru Yoshida , Masanaga Tokuyo
IPC分类号： H03M7/40 , G06T9/00 , H03M7/30
CPC分类号： H03M7/30 , G06T9/005
摘要： The present invention provides a plurality of code tables such as a high-usage code table and a low-usage code table in an entropy coding unit, and transforms a block-sorted last character string from a block-sorting transforming unit into an MTF code string in an MTF transforming unit. The entropy coding unit switches the code tables at a discontinuous part of the MTF code string to perform entropy coding. In addition, the present invention stores reference lists, whose number is equal to the number of kinds of used characters, in a reference list memory. The MTF transforming unit selects a reference list corresponding to a first character of the block-sorted character string to perform an MTF transformation.
摘要翻译：本发明在熵编码单元中提供诸如高使用码表和低使用码表的多个码表，并将块排序变换单元的块排序最后一个字符串变换为MTF码字符串在MTF转换单元。熵编码单元在MTF代码串的不连续部分切换代码表以执行熵编码。此外，本发明将引用列表的数量等于所使用字符的种类的数量存储在参考列表存储器中。 MTF变换单元选择与块排序字符串的第一个字符相对应的参考列表，以执行MTF变换。

6. 发明授权

US5673042A Method of and an apparatus for compressing/decompressing data 失效
标题翻译：用于压缩/解压缩数据的方法和装置
公开(公告)号：US5673042A
公开(公告)日：1997-09-30
申请号：US405209
申请日：1995-03-16
申请人： Shigeru Yoshida , Yoshiyuki Okada , Yasuhiko Nakano , Hironori Yahagi
发明人： Shigeru Yoshida , Yoshiyuki Okada , Yasuhiko Nakano , Hironori Yahagi
IPC分类号： G06F5/00 , G06F17/30 , G06T9/00 , H03M7/30 , H03M7/46 , H03H7/00
CPC分类号： G06F17/30985 , G06T9/005 , H03M7/3086
摘要： The present invention relates to a method of and an apparatus for compressing/decompressing data, to improve the compression ratio of sliding-dictionary-type Ziv-Lempel codes. A sliding-dictionary-type data compression method finds a matching character string in a coding character string and in a coded character string stored in a dictionary 101. According to the length of the matching character string, the method chooses a raw data mode that codes the matching character string that must consist of a single character as it is, or a reproduction mode that codes the position and length in the dictionary 101 of the matching character string. The method allocates consecutive numbers to different codes to be prepared under the raw data mode and reproduction mode. The method relates any code prepared under one of the raw data mode and reproduction mode to a corresponding one of the consecutive numbers, codes the number according to a code book, and rearranges the code book to shorten the length of the code of the number.
摘要翻译：本发明涉及一种用于压缩/解压缩数据的方法和装置，以提高滑动词典型Ziv-Lempel码的压缩率。滑动字典型数据压缩方法在编码字符串和字典101中存储的编码字符串中找到匹配的字符串。根据匹配字符串的长度，该方法选择编码的原始数据模式必须由单个字符组成的匹配字符串，或者编码匹配字符串的字典101中的位置和长度的再现模式。该方法将连续的数字分配给在原始数据模式和再现模式下准备的不同的代码。该方法将在原始数据模式和再现模式之一下准备的任何代码与相应的一个连续数字相关联，根据代码簿对该编号进行编码，并重新排列代码簿以缩短编号的代码长度。

7. 发明授权

US5220620A Color image data processing apparatus 失效
标题翻译：彩色图像数据处理装置
公开(公告)号：US5220620A
公开(公告)日：1993-06-15
申请号：US887670
申请日：1992-05-26
申请人： Yasuhiko Nakano , Shigeru Yoshida
发明人： Yasuhiko Nakano , Shigeru Yoshida
IPC分类号： G06K9/20 , G06K9/36 , G06T7/00 , G06T11/00 , H04N1/62
CPC分类号： G06T11/001 , H04N1/62
摘要： A color image data processing apparatus processes hue information of picture elements read out sequentially. A chromatic color detection unit is provided for detecting a chromatic color picture element series in a main scanning line having a consecutive succession of chromatic color picture elements including edge picture elements. A replacing unit is provided for replacing the hue value of each picture element of the chromatic color picture element series with a median hue value, the hue value of a picture element located approximately at the center position of the detected chromatic color picture element series. The apparatus may further have an averaged hue value switching unit for switching the hue value of each of the picture elements with an average of the hue value of the picture elements and of other picture elements located in a nearby region.
摘要翻译：彩色图像数据处理装置顺序地读出图像元素的色调信息。彩色检测单元用于检测具有包含边缘像素的彩色彩色像素的连续的主扫描线中的彩色像素序列。提供了一个替换单元，用于用彩色彩色图像元素系列的每个图像元素的色调值用中间色调值，大致位于检测到的彩色彩色像素序列的中心位置处的图像元素的色调值。该装置还可以具有平均色调值切换单元，用于以每个图像元素的色调值与位于附近区域中的其它像素的平均值进行切换。

8. 发明授权

US5177622A Method and apparatus for detecting run length of two successive pixels and subjecting run length to universal coding 失效
标题翻译：用于检测两个后续像素的运行长度并将运行长度用于通用编码的方法和装置
公开(公告)号：US5177622A
公开(公告)日：1993-01-05
申请号：US558445
申请日：1990-07-27
申请人： Shigeru Yoshida , Yasuhiko Nakano
发明人： Shigeru Yoshida , Yasuhiko Nakano
IPC分类号： H04N1/417 , G06T9/00 , H04N1/41
CPC分类号： G06T9/005 , H04N1/4105
摘要： A halftone image data compression apparatus includes a first part for detecting a continuous state of pattern data of two successive pixels on a line of a halftone image for N adjacent lines of the halftone image. A second part is coupled to the first part for detecting a run length of the continuous state detected in the first part along a direction of the lines, and a third part is coupled to the first and second parts for subjecting to a universal coding a time-sequential data which is in predetermined processing units. Each predetermined processing unit is made up of one run length which is detected by the second part and corresponding pattern data which are received from the first part while the continuous state is detected for the one run length.

9. 发明授权

US06925527B2 Storage control apparatus and method for compressing data for disk storage 失效
标题翻译：用于压缩磁盘存储数据的存储控制装置和方法
公开(公告)号：US06925527B2
公开(公告)日：2005-08-02
申请号：US10294551
申请日：2002-11-15
申请人： Yoshiyuki Okada , Masanaga Tokuyo , Shigeru Yoshida , Hiroyuki Shimoi , Naoaki Okayasu
发明人： Yoshiyuki Okada , Masanaga Tokuyo , Shigeru Yoshida , Hiroyuki Shimoi , Naoaki Okayasu
IPC分类号： G06F3/06 , G06F12/08 , G11B20/10 , H03M7/30 , G06F13/00
CPC分类号： G06F3/0601 , G06F12/0866 , G06F2003/0697 , G06F2212/312 , G06F2212/401
摘要： A method of managing compressed data including a cache segment generating operation generating cache segments each representing data that is obtained by assembling plural pieces of data requested of writing, and a compressed segment generating operation generating compressed segments each representing data that is obtained by compressing each of the cache segments generated in said cache segment generating operation. The method also includes a compressed segment allocating operation allocating each of the compressed segments generated in said compressed segment generating operation to one or more compression sectors each representing a buffer having a predetermined length, and a compression sector recording operation recording each of the compression sectors, on a disk storage device, to which at least one compressed segment is allocated in said compressed segment allocating operation.
摘要翻译：一种管理压缩数据的方法，包括：高速缓存段产生操作，产生各自表示通过组合写入请求的多个数据而获得的数据的高速缓存段;以及压缩段生成操作，生成压缩段，每个压缩段表示通过压缩每个在所述高速缓存段生成操作中生成的高速缓存段。该方法还包括压缩段分配操作，将在所述压缩段生成操作中生成的每个压缩段分配给一个或多个压缩扇区，每个压缩扇区表示具有预定长度的缓冲器，以及压缩扇区记录操作，记录每个压缩扇区，在磁盘存储设备中，在所述压缩段分配操作中至少分配一个压缩段。

10. 发明授权

US5854597A Document managing apparatus, data compressing method, and data decompressing method 失效
标题翻译：文件管理装置，数据压缩方法和数据解压缩方法
公开(公告)号：US5854597A
公开(公告)日：1998-12-29
申请号：US787537
申请日：1997-01-22
申请人： Kimitaka Murashita , Shigeru Yoshida , Yoshiyuki Okada
发明人： Kimitaka Murashita , Shigeru Yoshida , Yoshiyuki Okada
IPC分类号： H03M7/40 , G06F17/30 , H03M7/30
CPC分类号： G06F17/30011 , H03M7/30
摘要： In a document managing apparatus for forming a compressed document file where a keyword retrieval is available, a first process operation and a second process operation are alternately executed. In the first process operation, when document data to be compressed is given, the respective characters are directly written into a compressed document file until an end control character string appears in this document data. In the second process operation, data obtained by coding the respective characters are written into the compressed document file until a start control character series appears in the document data. Also, in this document managing apparatus, a third process operation and a fourth process operation are alternately performed, when the compressed document file is restored. In the third process operation, the respective data (characters) are directly outputted until the end control character string appears in the data contained in the compressed document file. In the fourth process operation, the decoding operation is carried out until the start control character string appears in the restored result of the data contained in the compressed document file.
摘要翻译：在用于形成关键字检索可用的压缩文件文件的文件管理装置中，交替执行第一处理操作和第二处理操作。在第一处理操作中，当给出要压缩的文档数据时，将各个字符直接写入压缩文档文件，直到该文档数据中出现结束控制字符串。在第二处理操作中，通过对各个字符进行编码而获得的数据被写入到压缩文档文件中，直到起始控制字符系列出现在文档数据中。此外，在本文档管理装置中，当压缩的文件文件被恢复时，交替执行第三处理操作和第四处理操作。在第三处理操作中，直接输出各个数据（字符），直到结束控制字符串出现在压缩文档中包含的数据中。在第四处理操作中，执行解码操作，直到起始控制字符串出现在包含在压缩文档文件中的数据的恢复结果中。

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