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1. 发明专利

JPH08167852A METHOD AND DEVICE FOR COMPRESSING DATA 失效
公开(公告)号：JPH08167852A
公开(公告)日：1996-06-25
申请号：JP30866294
申请日：1994-12-13
申请人： FUJITSU LTD
发明人： SATO NOBUKO , OKADA YOSHIYUKI , YOSHIDA SHIGERU
IPC分类号： G06F5/00 , H03M7/40
摘要： PURPOSE: To attain a sufficient compressiblity factor even when the size of an object to be compressed is small by sorting characters into plural groups each of which consists of characters having the same statistic property and calculating the appearance probability of each group. CONSTITUTION: A character string is inputted to a character group sorting part 10 and characters included in the character string are sorted into plural hierarchical groups in each character group having the same statistic property. Then a probability model preparing part 20 calculates the appearance probability of respective groups and the appearance probability of input characters in plural groups. An encoding part 30 encodes each input character based upon the calculated intra-group character appearance probability. Even when file size to be compressed is not sufficiently large size for the construction of a probability model, a high compressibility factor can be obtained without previously storing individual character appearance frequency. In the case of sorting characters into plural groups and calculating the appearance probability of respective groups, it is preferable to previously fix and apply the sorts of constitutional elements in respective groups and the appearance probability of respective groups.

2. 发明专利

JPH07134537A STEREOSCOPIC DISPLAY DEVICE 失效
公开(公告)号：JPH07134537A
公开(公告)日：1995-05-23
申请号：JP27940293
申请日：1993-11-09
申请人： FUJITSU LTD
发明人： ISHIMOTO MANABU , KATO MASAYUKI , ARITAKE TAKAKAZU , SATO NOBUKO
IPC分类号： G03H1/22
摘要： PURPOSE:To obtain the wide visual region of a stereoscopic picture even through the resolution of a hologram pattern is low in a stereoscopic display device using a hologram. CONSTITUTION:This device is provided with means 1 and 2 for generating plural reproducing light beams for the hologram, and a phase distribution display means 3 time-dividing or space-dividing the phase distribution of the hologram pattern corresponding to the respective reproducing light beams 10 and 11 and displaying them; and the visual region obtained by the respective reproducing light beams 10 and 11 is enlarged in comparison with the one obtained by a single reproduced light beam.

3. 发明专利

JPH06103323A STEREOSCOPIC IMAGE INFORMATION RETRIEVING DEVICE 失效
公开(公告)号：JPH06103323A
公开(公告)日：1994-04-15
申请号：JP24899192
申请日：1992-09-18
申请人： FUJITSU LTD
发明人： SATO NOBUKO , ARITAKE TAKAKAZU , KATO MASAYUKI , ISHIMOTO MANABU
IPC分类号： G06F17/30 , H04N13/00 , G06F15/40 , G06F15/62
摘要： PURPOSE:To reduce the fatigue of the eyes of a user at the time of retrieval on the stereoscopic image information retrieving device which retrieves necessary stereoscopic image information in a data base for stored stereoscopic images. CONSTITUTION:The stereoscopic image information retrieving device through which the retrieved stereoscopic image information is seen by viewing images for the right and left eyes which have parallax in order through polarizing spectacles 22 is provided with a 1st retrieval display means 100 which performs retrieval by displaying with a two-dimensional image and a 2nd retrieval display means 200 which displays the retrieved stereoscopic image after the retrieval by the 1st retrieval display means 100.

4. 发明专利

JP2001136075A DATA COMPRESSION/DECOMPRESSION DEVICE AND STORAGE MEDIUM WITH DATA COMPRESSION/DECOMPRESSION PROGRAM RECORDED THEREON 失效
公开(公告)号：JP2001136075A
公开(公告)日：2001-05-18
申请号：JP31571299
申请日：1999-11-05
申请人： FUJITSU LTD
发明人： SATO NOBUKO
IPC分类号： G06F5/00 , H03M7/40 , H03M7/42
摘要： PROBLEM TO BE SOLVED: To provide a data compression device that encodes a data sequence while dynamically reassembling a code tree and maintaining advantages through the use of the code tree provided with regularity. SOLUTION: The data compression device that receives data of a compression object as a character string consisting of characters expressed in a bit string of a prescribed length and encodes the data by assigning a variable length code to each character, is provided with a distribution table storage means 111 that stores a code length distribution table denoting a distribution of code lengths of codes included in a code table used for generating a canonical Huffman code, a sequence storage means 112 that stores the sequence on the basis of information corresponding to an appearance probability of each character in the data, a 1st code generating means 113 that encodes each character based on the code length distribution table and the sequence of each character, a sequence update means 114 that updates its sequence in response to the entry of the character string, and a distribution table update means 115 that updates the code length distribution table stored in the distribution table storage means 111.

5. 发明专利

JPH1155125A METHOD FOR COMPRESSING AND RESTORING CHARACTER DATA 失效
公开(公告)号：JPH1155125A
公开(公告)日：1999-02-26
申请号：JP20765497
申请日：1997-08-01
申请人： FUJITSU LTD
发明人： SATO NOBUKO
IPC分类号： H03M7/40
摘要： PROBLEM TO BE SOLVED: To provide high compressibility even in the case of small data when compressing data, while using a dictionary type encoding and probability statistic type encoding systems. SOLUTION: Source data are discriminated by a character discriminating part 11, converted into an internal number stream and encoded by a dictionary type encoding part 12. When a character string converted into an internal number is not held in a dictionary, it is divided into two groups by a group- specifying part 13, characters such as Japanese syllabary or Chinese characters are encoded by an 8-bit encoding part 14 and a 13-bit encoding part 15, and they are outputted while adding bits showing the groups. When restoring data, the compressed data are restored at a dictionary type restoration part 22, the internal number is provided. When the compressed data are not dictionary codes, they are decoded for each group, while specifying the group through a group specifying part 21 and converted to a character code by a character code converting part 25. In this case, the method can be similarly applied to data compression due to the probability statistics type encoding system as well.

6. 发明专利

JPH08293800A METHOD AND DEVICE FOR DATA COMPRESSION, AND METHOD AND DEVICE FOR DATA RECONSTITUTION 失效
公开(公告)号：JPH08293800A
公开(公告)日：1996-11-05
申请号：JP27157795
申请日：1995-10-19
申请人： FUJITSU LTD
发明人： YAHAGI HIRONORI , SATO NOBUKO , OKADA YOSHIYUKI , YOSHIDA SHIGERU
IPC分类号： H03M7/42 , H03M7/30 , H03M7/40
摘要： PURPOSE: To obtain a data compressing method in which a desirable data compression ratio can be obtained even through a small quantity of memory, and besides, a desirable compression ration can be obtained even in the case where the remarkable contex does not appear at the head of a sentence or the contex itself changes. CONSTITUTION: In the data compressing method in which a data string registering part to register a data string is used, and also, a code information registering part to register the encoded information of the data string constituted so that data to show 'unregistered' is contained beforehand is used, and the encoded information is encoded in accordance with the history of input data, a data string newly registering process (404) which registers newly the object data string to be encoded consisting of the contex and the newly inputted data to the data string registering part when the data string inputted immediately before the newly inputted data is made the contex, a code information newly registering process (412) which registers newly the information of the encoded object data string to the encoded to the code information registering part, a code information output process (409) which outputs the code information registered in the code information registering part, and a code information updating process (41) which updates the code information registering part are provided.

7. 发明专利

JPH07210070A SPATIAL LIGHT MODULATOR AND STEREOSCOPIC DISPLAY DEVICE EQUIPPED WITH THE SAME 失效
公开(公告)号：JPH07210070A
公开(公告)日：1995-08-11
申请号：JP677494
申请日：1994-01-26
申请人： FUJITSU LTD
发明人： KATO MASAYUKI , ARITAKE TAKAKAZU , ISHIMOTO MANABU , SATO NOBUKO
IPC分类号： G03H1/08
摘要： PURPOSE:To display a hologram with a small number of pixels by monotonously varying the pixel pitch of a display screen of a spatial light modulator in one or both of the longitudinal and lateral directions. CONSTITUTION:The pixel pitch of the display screen of the spatial light modulator 1 is monotonously varied in one or both of the longitudinal and lateral directions. For example, the pixel pitch is monotonously varied to the right when the pixel pitch of the left end is d0 and the pitch of the right end is dn. The pixel pitch at a distance (y) from an end of the screen is set equal to or less than (1/2)Xlambda(sin(tan (W;X)/D))+sin(tan (y-W+X)/D)), where 2W is the screen width in the direction wherein the pixel pitch is monotonously varied, 2X the visual area width of a reproduced image, D and observation distance, and lambda the wavelength of reproduction light. Consequently, the number of pixels required to display a display pattern on the spatial light modulator 1 can be decreased.

8. 发明专利

JPH06110374A STEREOGRAPHIC DISPLAY DEVICE 失效
公开(公告)号：JPH06110374A
公开(公告)日：1994-04-22
申请号：JP26092492
申请日：1992-09-30
申请人： FUJITSU LTD
发明人： ARITAKE TAKAKAZU , KATO MASAYUKI , ISHIMOTO MANABU , SATO NOBUKO , NAKAJIMA MASAHITO
IPC分类号： G02B27/22 , G03H1/04 , G03H1/08 , G03H1/26 , H04N13/04 , H04N15/00
摘要： PURPOSE:To provide a stereographic display device to display a stereographic image from plural two-dimensional images with different visual point positions in which stereograpgic display can be performed without requiring the calculation of phase distribution even when the two-dimensional image is switched. CONSTITUTION:An image display means 1 which displays the two-dimensional image, and a beam deflection means 2 which deflects light from a picture element comprising the image of the image display means 1 are provided. The beam deflection means 2 is arranged adjacently to the front of the image display means 1, and the plural two-dimensional images with different visual directions are displayed on the image display means 1 sequentially. Simultaneously, the light from each picture element is deflected so that it can be directed to an area where a visual point is set to obtain the picture element by the beam deflection means 2 synchronizing with the display of the two-dimensional image. and such switching is performed at high speed.

9. 发明专利

JP2000101442A DATA COMPRESSOR, RESTORING DEVICE AND METHOD THEREFOR 失效
公开(公告)号：JP2000101442A
公开(公告)日：2000-04-07
申请号：JP27272498
申请日：1998-09-28
申请人： FUJITSU LTD
发明人： MORIHARA TAKASHI , YAHAGI HIRONORI , SATO NOBUKO
IPC分类号： G06F5/00 , G06T9/00 , H03M7/30 , H03M7/40
摘要： PROBLEM TO BE SOLVED: To compress and restore a structural document, including a tag in a way such that the retrieval time or the read time of the document is reduced and increase in a memory and disk capacity is minimized. SOLUTION: A tag information separate section 10 separates a tag which is identified from a character stream and outputs the tag as tag information. A tag replacement section 12 places a tag code for identification to a position of the character stream, from which the tag is separated. A character string coding section 14 applies compression coding to the character stream, including the tag code outputted from the tag code replacement section 12. A data decoder decodes the character stream with operation reverse to that of the compression.

10. 发明专利

JP2000082967A DATA COMPRESSION METHOD/DEVICE 失效
公开(公告)号：JP2000082967A
公开(公告)日：2000-03-21
申请号：JP15021799
申请日：1999-05-28
申请人： FUJITSU LTD
发明人： SATO NOBUKO , YOSHIDA SHIGERU
IPC分类号： G06F5/00 , G06K9/36 , G06K9/72 , H03M7/30 , H03M7/38 , H03M7/40
摘要： PROBLEM TO BE SOLVED: To speed up retrieval and to reduce a table area by obtaining past appearance position information against a character string when referred first and second array contents match. SOLUTION: An obtained character string x1x2x3 is inputted to a bit distribution part 11 and all the bits of the character string are distributed to twelve first and second bit codes S1 and S2 for example. When the first and second bit codes S1 and S2 formed on the character string of three characters starting from a position (t) are used as the, addresses of array and a table is referred to, contents address 1 [S1] 2 and 2 [S2] obtained from the respective tables 12 and 13 match if the character string appears in the past. When a reference (matching detection) part 14 recognizes the matching address 1 [S1] and 2 [S2], address 1 [S1] or address 2 [S2] shows a past appearance position in an input buffer 10 on the retrieval character string x1x2x3.

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