Hiromi Aoyagi
34Patents
7h-index
18Co-inventors
62Inventor score
Filing activity: Feb 9, 1995 → Nov 25, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5752223A | Code-excited linear predictive coder and decoder with conversion filter for converting stochastic and impulsive excitation signals | Physics | 75 | Expired |
| US5727122A | Code excitation linear predictive (CELP) encoder and decoder and code excitation linear predictive coding method | Physics | 34 | Expired |
| US5826221A | Vocal tract prediction coefficient coding and decoding circuitry capable of adaptively selecting quantized values and interpolation values | Physics | 31 | Expired |
| US8577046B2 | Apparatus for estimating sound source direction from correlation between spatial transfer functions of sound signals on separate channels | Electricity | 23 | Active |
| US5974375A | Coding device and decoding device of speech signal, coding method and decoding method | Physics | 21 | Expired |
| US7349330B1 | Packet receiver with the influence of jitter and packet losses reduced before a buffer becomes idle due to data delays and packet receiving method using the same | Electricity | 13 | Expired |
| US8204262B2 | Sound image localization processor, method, and program | Electricity | 8 | Active |
| US6885659B2 | Voice packet communications system with communications quality evaluation function | Electricity | 6 | Expired |
| US7489678B2 | Voice packet communications system with communications quality evaluation function | Electricity | 5 | Active |
| US7733849B2 | Voice communications system | Electricity | 5 | Active |
| US5905970A | Speech coding device for estimating an error of power envelopes of synthetic and input speech signals | Physics | 5 | Expired |
| US7123607B2 | Quality control device for voice packet communications | Electricity | 4 | Expired |
| US7305338B2 | Apparatus and method for concealing erased periodic signal data | Physics | 2 | Expired |
| US7672296B2 | Real-time communications system of high communications quality and media terminal apparatus | Electricity | 2 | Active |
| US8000976B2 | Speech band extension device | Physics | 2 | Active |
| US6687368B1 | Tone signal detecting method and tone signal detector | Electricity | 2 | Expired |
| US7443837B2 | Telephone communication system | Electricity | 2 | Expired |
| US8090093B2 | Echo canceller | Electricity | 1 | Active |
| US6621227B1 | Discharge generating apparatus and discharge generating method | Performing Operations; Transporting | 1 | Expired |
| US7924824B2 | Voice packet communications system with communications quality evaluation function | Electricity | 1 | Active |
| US6678660B1 | Receiving buffer controlling method and voice packet decoder | Electricity | 1 | Expired |
| US8619933B2 | Receiver apparatus for absorbing clock difference between transmitting and receiving sides and a method therefor | Physics | 1 | Active |
| US6826496B2 | Circuitry for and a method of detecting tonal signals with the processing capacity distributed with weight to frequency and time domains | Physics | 0 | Expired |
| US8484037B2 | Bandwidth extension apparatus for automatically adjusting the bandwidth of inputted signal and a method therefor | Physics | 0 | Active |
| US8396703B2 | Voice band expander and expansion method, and voice communication apparatus | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.