Inventor

YOSHIURA HIROSHI

JP63 patents

⚠️ This page may combine multiple inventors who share the name “YOSHIURA HIROSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

YOSHIURA HIROSHI

HITACHI LTD

Method and system for distributing multimedia data with management information

Digital data authentication method

Copy protection apparatus and method

Digital data authentication method

Method and apparatus of intelligent guidance in natural language

Recording device

Method of extracting digital watermark information and method of judging bit value of digital watermark information

Method of authenticating digital-watermark pictures

Electronic document, genuineness management method for print medium thereof, genuineness management system, program, and program recording medium

Control method and apparatus for embedding information in data

Method for reproducing data, apparatus for reproducing data, method for coding data, method for recording data, apparatus for recording and reproducing data, method for authentication, semiconductor chip, reproducing apparatus, recording apparatus and data processing apparatus

Method and apparatus for recording and reproducing electronic watermark information, and recording medium

Data transmission method for embedded data, data transmitting and reproducing apparatuses and information recording medium therefor

Data compression/encryption method and system

Method of physical individual authentication and system using the same

Method of and apparatus for compressing and decompressing data and data processing apparatus and network system using the same

Method and apparatus for encrypting data

Water-mark embedding method and system

Method and apparatus for recording and reproducing electronic watermark information, and recording medium

Electronic document authenticity assurance method and electronic document disclosure system

Trusted computer system

Time stamp generating system

Method and system for recovering the validity of cryptographically signed digital data

Watermark information detection method

Additional information embedding method, additional information detecting method, additional information embedding apparatus and additional information detecting apparatus

Method of judging digital watermark information

Digital watermark image processing method

Method of extracting digital watermark information and method of judging but value of digital watermark information

Method and device for managing computer network

Method for embedding information and extracting the same

Case-based inference processing method

Inference method and system

Steganographic system, method, program and storage medium therefor

Method and system for contents control

Data decompression/decryption method and system

Method for verifying a digital signature

Digital watermark data embedding method, and digital watermark data embeddability analyzing method

Contents rendering control method, contents reproducing equipment, and contents distribution equipment

Method and apparatus for using contents

System and method of searching for electronic data

Reproducing apparatus, recording apparatus and display apparatus

Reproducing apparatus, recording apparatus and display apparatus

Data transmission method for embedded data, data transmitting and reproducing apparatuses and information recording medium therefor

Reproducing apparatus, recording apparatus and display apparatus

Method and system for embedding information into contents

Method and apparatus for recording and reproducing electronic watermark information, and recording medium

Method for retrieving case for problem and inferring solution of the problem and system thereof

Method and system for recovering the validity of cryptographically signed digital data

Method of extracting digital watermark information and method of judging bit value of digital watermark information

SONY CORP

Method of and apparatus for restricting copy of digital information, and apparatus for recording digital information