William Chunhung Yip
22Patents
14h-index
21Co-inventors
77Inventor score
Filing activity: May 31, 1991 → Jul 16, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6084967A | Radio telecommunication device and method of authenticating a user with a voice authentication token | Electricity | 166 | Expired |
| US5926756A | Method and system for programming a cellular phone | Electricity | 90 | Expired |
| US5856970A | Multi-channel echo cancellation method and apparatus | Electricity | 42 | Expired |
| US5896452A | Multi-channel echo canceler and method using convolution of two training signals | Electricity | 41 | Expired |
| US5187745A | Efficient codebook search for CELP vocoders | Physics | 36 | Expired |
| US5815020A | Balance differential receiver | Physics | 35 | Expired |
| US5265190A | CELP vocoder with efficient adaptive codebook search | Physics | 34 | Expired |
| US6415029B1 | Echo canceler and double-talk detector for use in a communications unit | Electricity | 25 | Expired |
| US5179594A | Efficient calculation of autocorrelation coefficients for CELP vocoder adaptive codebook | Physics | 23 | Expired |
| US5357567A | Method and apparatus for volume switched gain control | Electricity | 21 | Expired |
| US6104726A | Simultaneous transfer of voice and data information using multi-rate vocoder and bit control protocol | Electricity | 21 | Expired |
| US5173941A | Reduced codebook search arrangement for CELP vocoders | Physics | 21 | Expired |
| US5721782A | Partitioned echo canceler utilizing decimation echo location | Electricity | 21 | Expired |
| US6799062B1 | Full-duplex hands-free transparency circuit and method therefor | Electricity | 19 | Expired |
| US5812942A | Balanced differential radio receiver and method of operation | Electricity | 13 | Expired |
| US5751718A | Simultaneous transfer of voice and data information using multi-rate vocoder and byte control protocol | Electricity | 13 | Expired |
| US7142665B2 | Automatic gain control for an adaptive finite impulse response and method therefore | Electricity | 11 | Expired |
| US5504802A | Communication system apparatus for transmitting and receiving data having a radio wireline interface | Electricity | 10 | Expired |
| US6658112B1 | Voice decoder and method for detecting channel errors using spectral energy evolution | Physics | 10 | Expired |
| US6707912B2 | Method and apparatus for setting a step size for an adaptive filter coefficient of an echo canceller | Electricity | 7 | Expired |
| US7065207B2 | Controlling attenuation during echo suppression | Electricity | 1 | Expired |
| US6928409B2 | Speech recognition using polynomial expansion and hidden markov models | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.