Seiko Epson Corporation

Other

A.i. Soft, Inc.

Noboru Kitazawa

Shingo Yudasaka

Kaoru Nakabayashi

Takahiro Kobayashi

Yasushi Hiraoka

Akihiro Sato

Toshiaki Okayama

A user I/F unit,transmits an instruction given by a user to an access management unit,and displays data on a monitor,. The access management unit,transfers requirements to a communication control unit,and a data management unit,in response to the instruction from the user, transfers data from a communications host to the data management unit,, and outputs data from a database,to the user I/F unit,. The data management unit,writes data into the database,and reads storage data from the database,in response to the requirement from the access management unit,. Data transmitted from the communications host are sorted out according to communication services and stored in the database,. The communication control unit,translates the requirement from the access management unit,to a menu number representing each communication service available from the communications host or a command and sends the translated requirement to a communication I/F unit,. This structure enables input data to be sorted out and stored without any overlap.

Data-update monitoring in communications network

A user I/F unit 200 transmits an instruction given by a user to an access management unit 100 and displays data on a monitor 76. The access management unit 100 transfers requirements to a communication control unit 300 and a data management unit 400 in response to the instruction from the user, transfers data from a communications host to the data management unit 400, and outputs data from a database 410 to the user I/F unit 200. The data management unit 400 writes data into the database 410 and reads storage data from the database 410 in response to the requirement from the access management unit 100. Data transmitted from the communications host are sorted out according to communication services and stored in the database 410. The communication control unit 300 translates the requirement from the access management unit 100 to a menu number representing each communication service available from the communications host or a command and sends the translated requirement to a communication I/F unit 500. This structure enables input data to be sorted out and stored without any overlap.

A method of reversible data compression is disclosed. The method is an improvement on the Lempel-Ziv data compression method that does not require a prefix for every noncompressed data unit in the encoded data stream. A code is inserted at the beginning of each string of consecutive noncompressed data bytes to indicate that the string is of noncompressed data and the number of bytes in the string. By eliminating the requirement for a separate prefix for each noncompressed data, a higher compression ratio is achieved over conventional Lempel-Ziv encoding methods.

Reversible method of encoding data

Growing community of inventors

Matsumoto, Japan

Noboru Kitazawa