1
Takahiro Nomura, Yohtato Yatsuzuka, Shigeru Iizuka: Speech signal coding/decoding system based on the type of speech signal. Kokusai Denshin Denwa, Armstrong & Kubovcik, June 23, 1992: US05125030 (113 worldwide citation)

An input speech signal is encoded by an adaptive quantizer which quantizes the predicted residual signal between the digital input speech signal, and prediction signals provided by predictors and a shaped quantization noise provided by a noise shaping filter. An inverse quantizer, to which the encod ...


2
Masahiro Yamazaki, Shigeru Iizuka, Shigemitsu Kamiya, Yoshiro Oka, Katsuhiro Fujino: Method and apparatus for feeding drug liquid from hermetic returnable can. Nippon Zeon, Fujitsu, Weingarten Schurgin Gagnebin & Hayes, June 30, 1987: US04676404 (50 worldwide citation)

An apparatus for feeding a variety of doping liquid used in doping-liquid treatment processes for electronic materials such as semiconductors and precision machinery components, and a feeding monitor apparatus. More specifically, it relates to an apparatus for stably feeding the doping liquid while ...


3
Shigeru Iizuka, Youtaro Yatsuzuka: Echo canceller using two residual echoes. Kokusai Denshin Denwa, Nikaido Marmelstein Murray & Oram, May 24, 1994: US05315585 (43 worldwide citation)

In an echo canceller having PCM interfaces used in a PCM telephone circuit, an echo estimator (6) is coupled with a receive path through a linear code converter (13) for obtaining a linear receive input signal, and a first subtractor (7) is inserted after a linear code converter (13) in a transmit p ...


4
Takahiro Nomura, Yohtaro Yatsuzuka, Shigeru Iizuka, Hideki Honma: Speech coding/decoding system with reduced quantization noise. Kokusai Denshin Denwa, Armstrong Nikaido Marmelstein Kobuvcik & Murray, May 12, 1992: US05113448 (13 worldwide citation)

An input speech signal is encoded by an adaptive quantizer device (16). The adaptive quantizer device quantizes the predicted residual signal produced by removing correlations from the digital input signal by predictors devices (6, 10). A coefficient or weighting factor, called a leakage, at the pre ...