Bizarre Patents
A banana protective device for storing and transporting a banana carefully.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5274711 | Apparatus and method for modifying a speech waveform to compensate for recruitment of loudness An apparatus and method for modifying a speech waveform using sinusoidal speech model parameters, includes finding a net masked threshold for each sinusoid for a normal-hearing subject, and adding the effects of impairment and obtaining an impaired masked... | 12/28/1993 |
| 5226085 | Method of transmitting, at low throughput, a speech signal by celp coding, and corresponding system A method is provided for transmitting a digital speech signal at low throughput. Coding is performed by code excited linear prediction in order to generate a code signal, a waveform being represented by an initial vector (O) of dimension L, from a filter ... | 07/06/1993 |
| 5146504 | Speech selective automatic gain control An automatic gain control circuit uses a speech recognizer to obtain smooth automatic gain control. An analog audio input signal is converted to a digital signal by an analog-to-digital converter and delayed by a delay circuit. A frame power (or alternati... | 09/08/1992 |
| 5117228 | System for coding and decoding an orthogonally transformed audio signal A system for coding and decoding an audio signal by using an orthogonal and inverse orthogonal transformation of a block unit, includes a coding unit having a circuit for obtaining a power level of the audio signal of a segment unit having a predetermined... | 05/26/1992 |
| 5086471 | Gain-shape vector quantization apparatus A gain-shape vector quantization apparatus for compressing the data of voice signal. A code book portion is constituted by a plurality of shape vectors which produce a plurality of selected shape vectors. A plurality of variable gain circuits impart gains... | 02/04/1992 |
| 5054085 | Preprocessing system for speech recognition The present invention processes an independent body of speech during an enrollment process and creates a set of speaker specific enrollment parameters for normalizing analysis parameters including the speaker's pitch, the frequency spectrum of the speech ... | 10/01/1991 |
| 5012519 | Noise reduction system Noise in a speech-plus-noise input signal is suppressed by splitting the input signal into spectral channels and decreasing the gain in the each channel which has a low signal-to-noise ratio (SNR). A voice operated switch (VOX) acts to detect noise-only i... | 04/30/1991 |
| 4912766 | Speech processor In a speech processor such as a speech recognizer, the problem of distortion of extracted features caused by adaptation of the input automatic gain control (AGC) during feature extraction is solved by storing the AGC's gain coefficient along with the ener... | 03/27/1990 |
| 4853963 | Digital signal processing method for real-time processing of narrow band signals A digital signal processing method for real-time processing of narrow band signals to provide for reconstitution of dynamic amplitude and harmonics beyond the passband. The method utilizes a digital microprocessor implementing a digital algorithm upon a d... | 08/01/1989 |
| 4825385 | Speech processor method and apparatus A speech synthesizer circuit for use in an automobile. The circuit includes a dedicated microprocessor and a speech synthesizer integrated circuit which has an output couplable to the speakers of the automobile's radio. The microprocessor monitors various... | 04/25/1989 |
| 4783805 | System for converting a voice signal to a pitch signal A system for converting a voice signal to a pitch signal comprises a first circuit for obtaining a pulse signal having a period corresponding to peak values of an input voice signal, a second circuit for quantizing the output pulse signal of the first cir... | 11/08/1988 |
| 4777649 | Acoustic feedback control of microphone positioning and speaking volume The present invention is directed to an apparatus and method which provide repeatable control of speech input to a microphone via audio feedback to a user. In this manner, repeatable and simultaneous control of microphone positioning and speaking volume i... | 10/11/1988 |
| 4757542 | Speech synthesizer method and apparatus A speech synthesizer control circuit for use in a vehicle. The circuit includes a number of features which provide cost effectiveness while maintaining speech synthesizer reliability. One feature of the invention is use of a counter circuit interposed bet... | 07/12/1988 |
| 4747143 | Speech enhancement system having dynamic gain control An arrangement for a speech enhancement processor which maintains the processed speech at a constant level regardless of large changes in the associated noise level. The composite speech and noise signal is applied to a first AGC circuit and then to a spe... | 05/24/1988 |
| 4638506 | Sound field simulation system and method for calibrating same The present invention relates to a system for generating within a relatively small enclosed space a sound field corresponding to that in a relatively large enclosed space having specific acoustic characteristics, said system including an input unit adapte... | 01/20/1987 |
| 4630305 | Automatic gain selector for a noise suppression system An automatic gain selector is disclosed for use with a noise suppression system which performs speech quality enhancement upon a noisy speech signal available at the input to generate a noise-suppressed speech signal at the output by spectral gain modific... | 12/16/1986 |
| 4628529 | Noise suppression system An improved noise suppression system (400) is disclosed which performs speech quality enhancement upon speech-plus-noise signal available at the input (205) to generate a clean speech signal at the output (265) by spectral gain modification. The noise sup... | 12/09/1986 |
| 4611342 | Digital voice compression having a digitally controlled AGC circuit and means for including the true gain in the compressed data An apparatus for use in transmitting compressed digital voice data includes an analyzer for compressing digitized voice data according to an algorithm which produces a root mean square of the voice data. An analog to digital converter is used to convert a... | 09/09/1986 |
| 4609878 | Noise reduction system A noise reduction system including a signal path (34) between an input terminal (12) and an output terminal (36), a voltage control amplifier (38) and a control path (40) between the input terminal and the voltage control amplifier is disclosed. A nonline... | 09/02/1986 |
| 4587669 | Speech compression A device for providing real time speech compression and expansion and method therefor which enables speech data, sampled at a predetermined rate, and consisting of a preselected number of bits per sample, to be compressed in real time by a factor of appro... | 05/06/1986 |
| 4384169 | Method and apparatus for speech synthesizing A method and apparatus for analyzing and synthesizing speech information in which a predetermined vocabulary is spoken into a microphone, the resulting electrical signals are differentiated with respect to time, digitized, and the digitized waveform is ap... | 05/17/1983 |
| 4352957 | Speech detector circuit with associated gain control for a tasi system Disclosed is a centralized circuit for determining whether input signals from a plurality of channels are speech which includes memory means in which digital amplitude samples from each of the input channels are stored in real time. A control means then p... | 10/05/1982 |
| 4301333 | Speech compression A device for providing real time speech compression and expansion and method therefor which enables speech data, sampled at a predetermined rate, and consisting of a preselected number of bits per sample, to be compressed in real time by a factor of appro... | 11/17/1981 |
| 4270026 | Interpolator apparatus for increasing the word rate of a digital signal of the type employed in digital telephone systems This speech signal digital interpolator increases data (and date rate) by first using an interface unit for rate-changing and zero-stuffing a 32 Kiloword/sec (13 bits/word) signal to form a 1.024 Megaword/sec (13 bits/word) signal, which is then smoothed ... | 05/26/1981 |
| 4270027 | Telephone subscriber line unit with sigma-delta digital to analog converter A digital to analog converter is employed in the digital line circuit of a telephone system and operates to convert a digital signal indicative of an analog speech signal back into a replica of the analog signal. The converter operates with an interpolate... | 05/26/1981 |
| 4230906 | Speech digitizer A speech digitizer is disclosed including an analyzer for generating power and filter coefficient parameters representative of an analog speech waveform. The digitizer also includes a pitch detector for generating a digital pitch parameter substantially r... | 10/28/1980 |
