Inventor

OTA YASUJI

JP45 patents

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

OTA YASUJI

FUJITSU LTD

Voice code conversion apparatus

Method and system for embedding and extracting data from encoded voice code

Voice enhancement device by separate vocal tract emphasis and source emphasis

Speech transcoding method and apparatus for silence compression

Voice encoding and voice decoding using an adaptive codebook and an algebraic codebook

Speech detecting device and speech detecting method

Speech encoding and decoding method and speech encoding and decoding apparatus

Speech coding apparatus

Voice code conversion apparatus

Packet receiving method and device

Voice code conversion method and apparatus

Speech coding apparatus, speech processing apparatus, and speech processing method

Noise reduction apparatus and noise reducing method

Speech speed converting device and speech speed converting method

Speech coding apparatus for separately processing divided signal vectors

Data decryption apparatus and data encryption apparatus

Data embedding device and data extraction device

Voice packet loss concealment device, voice packet loss concealment method, receiving terminal, and voice communication system

Telephone and voice adjustment method for telephone

Word or collocation emphasizing voice synthesizer

Portable terminal device and method of controlling portable terminal device

Voice processing apparatus and voice processing method for changing accoustic feature quantity of received voice signal

Pitch conversion method and device for converting a pitch of an input signal into a desired pitch

Voice coding method, voice coding apparatus, and voice decoding apparatus

Audio coder

Interactive communication system, communication equipment and communication control method

Speech decoder, speech decoding method, program and storage media to improve voice clarity by emphasizing voice tract characteristics using estimated formants

OTANI TAKESHI

Audio signal processing system and audio signal processing method

Clipping detection device and method

Method for identifying a device transmitting an echo signal, echo source identifying method for identifying echo source, measuring apparatus for identifying a source of an echo, and echo source identifying apparatus

Echo processing method and device

Voice communication apparatus

ENDO KAORI

Speech sound enhancement device utilizing ratio of the ambient to background noise

Voice band expansion device, voice band expansion method, and communication apparatus

Concealment signal generator, concealment signal generation method, and computer product

Communication apparatus for adjusting a voice signal

TOGAWA TARO

Active noise reduction system and active noise reduction method

Voice reproduction with playback time delay and speed based on background noise and speech characteristics

Active silencer and method for controlling active silencer

Active noise control apparatus

OTA YASUJI

Voice communication quality assessing system

Sensing apparatus, sensor information gathering apparatus, sensing method, and remote sensing method

TSUCHINAGA YOSHITERU

Data embedding device and data extraction device

HAMASAKI RYOSUKE

Inter-multipoint voice conversation apparatus

TANAKA MASAKIYO

Sleep apnea syndrome testing apparatus, test method for sleep apnea syndrome and tangible recording medium recording program