Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 4401850 | Speech analysis apparatus Speech analysis apparatus converts sounds to electrical signals which are fed via a selectable low pass filter to extract the fundamental pitch frequency while attenuating the increase in energy with voice pitch and the influence of higher voice pitch har... | 08/30/1983 |
| 4388491 | Speech pitch period extraction apparatus A speech pitch period extracting apparatus includes an amplitude classifying and coding circuit for classifying and coding the amplitude of a selected frame of a speech waveform signal to be analyzed into at least three levels of coded data, and a coincid... | 06/14/1983 |
| 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 |
| 4384335 | Method of and system for determining the pitch in human speech Method of and arrangement for the determination of the pitch of speech signals in a system of speech analysis, wherein sequences of significant peak positions of the amplitude spectrum of a speech signal are derived (13) from time segments of the speech s... | 05/17/1983 |
| 4365115 | Time-axis compression-expansion devices for sound signals The device of the present invention utilizes a processing principle for time-axis compression-expansion devices which presents variations of reproduction speed from reducing the intelligibility of sounds. Sound signals, without being subjected to any time... | 12/21/1982 |
| 4360708 | Speech processor having speech analyzer and synthesizer Adaptive bit allocation optimizes the encoded transmission of speech signal parameters. Allocation is controlled by a voiced/unvoiced decision signal derived from occurrence rate distributions of Partial Correlation Coefficient K1.... | 11/23/1982 |
| 4330689 | Multirate digital voice communication processor To provide alternative operation at 2.4 or 9.6 Kb/s bit rates, a multirate igital processor generates a data frame of 216 bits representing sync and voice encoded at both rates, with the 2.4 Kb/s embedded as a subset within the frame. Rate conversion is ma... | 05/18/1982 |
| 4310721 | Half duplex integral vocoder modem system Disclosed is a system whereby in a transmit mode analog speech is sampled d converted digitally to 12 bits of accuracy and then fed into a fast Fourier transform (FFT) processor which analyzes the speech into spectral and pitch parameters. These parameter... | 01/12/1982 |
| 4282406 | Adaptive pitch detection system for voice signal A system for detecting the pitch of a voice signal, in which a plurality of pitch searching periods are determined so that pitch components of multiple relationship are not included in each of the pitch searching periods, and in which after detecting a pi... | 08/04/1981 |
| 4276445 | Speech analysis apparatus Speech analysis apparatus transduces speech sounds to electrical signals which are fed via a selectable low pass to extract the pitch frequency. The pitch frequency representing signals are fed via a frequency to voltage transducer to a visual display dev... | 06/30/1981 |
| 4275266 | Device to control machines by voice A device to control machines by voice is disclosed which responds to a plurality of predetermined musical tones in a sequence to generate a digital control output signal. Audio conversion means convert the sequence of tones into a corresponding sequence o... | 06/23/1981 |
| 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 |
| 4223180 | Human speech envelope tracker This invention recovers the time waveform envelope of a human voice signal ithout the loss of subtleties providing speaker recognition cues and voice quality. This is accomplished by rectifying the voice envelope and then obtaining slope information about ... | 09/16/1980 |
| 4214125 | 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... | 07/22/1980 |
| 4081605 | Speech signal fundamental period extractor A speech signal fundamental period extractor which receives a residual value signal from a speech analyzer, such as one using autocorrelators. The residual value signal is first passed through a filter to remove the high-frequency components. Then the sig... | 03/28/1978 |
| 4063030 | Detection circuit for significant peaks of speech signals A detection circuit for the significant peaks of a speech signal, comprising first and second detectors respectively for detecting the positive and negative peaks of said speech signal. Each of these detectors is followed by a peak charging circuit compri... | 12/13/1977 |
| 4020291 | System for time compression and expansion of audio signals A system for time compression and expansion of audio signals comprises a filter for filtering the fundamental frequency component of an input signal reproduced at a speed differing from that at the time of recording, first and second memory devices for ca... | 04/26/1977 |
| 4004096 | Process for extracting pitch information A process is described for extracting the most-likely estimate of pitch f a digitized speech signal. For each segment of speech analyzed, a measure of merit is constructed for each of several possible preselected pitch periods. These measures are periodi... | 01/18/1977 |
| 3979557 | Speech processor system for pitch period extraction using prediction filters A computational algorithm and an implementation thereof is described herein for determining the pitch period of voiced speech in real time. All processing is performed in the time domain employing the prediction residual or error signal of a 10th-order It... | 09/07/1976 |
| 3978287 | Real time analysis of voiced sounds A power spectrum analysis of the harmonic content of a voiced sound signal is conducted in real time by phase-lock-loop tracking of the fundamental frequency, fo, of the signal and successive harmonics hl through hn of the... | 08/31/1976 |
| 3952164 | Vocoder system using delta modulation A speech transmission system employing a semi-vocoder comprising a spectral analyzer and a spectral synthesizer for the upper frequency range of the speech signal. The speech signal in the low frequency range base band is transmitted by using delta modula... | 04/20/1976 |
| 3947638 | Pitch analyzer using log-tapped delay line A pitch analyzer is described which extracts, on a real-time or pipeline is, the pitch information from a speech signal. The analyzer converts the speech signal to a digital signal, shifts it into a delay line tapped at logarithmic intervals and construc... | 03/30/1976 |
