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| Number | Title | Issue Date |
| 5862233 | Wideband assisted reverberation system A wideband assisted reverberation system has multiple microphones (M1-M3) to pick up reverberant sound in a room, multiple loudspeakers (L1-L3) to broadcast sound into the room, and a reverberation matrix connecting a similar bandwidth signal from the mic... | 01/19/1999 |
| 5862231 | DSP programming apparatus and DSP device A DSP programming apparatus capable not only of reducing work load for software engineers at the time of doing DSP programming but also of modularizing commonly usable algorithms, as well as to provide a DSP device capable of storing programs prepared by ... | 01/19/1999 |
| 5857856 | Apparatus and system for generating sound based upon waveform data and system-sequence data A sound producing apparatus which implements a sound output process based on waveform data, corresponding to sound generated by the apparatus, and system-sequence data including information for processing the waveform data. The apparatus comprises a read-... | 01/12/1999 |
| 5848164 | System and method for effects processing on audio subband data An audio effects processing system and method performs audio effects processing on a subband-by-subband basis using less memory and computational resources than audio effects produced through post processing of a fullband audio signal. The input fullband ... | 12/08/1998 |
| 5848165 | Fat sound creation means Intermodulation means for the emulation and exaggeration of an aspect of vacuum tube amplifiers by solid state, digital, speaker or other means. The intermodulation means produces intermodulation products of the input and an audio signal source which may ... | 12/08/1998 |
| 5841875 | Digital audio signal processor with harmonics modification The audio signal processor has a harmonics modifier for processing an input audio signal to produce an output audio signal. The harmonics modifier is comprised of translating means for sequentially translating the input audio signal into an address signal... | 11/24/1998 |
| 5841993 | Surround sound system for personal computer for interfacing surround sound with personal computer A surround sound system for personal computer includes a control card and a PC surround decoder. The control card is a PC interface card for interfacing to the personal computer and draining the 5 VDC and &#b1;12 VDC power from the personal computer as po... | 11/24/1998 |
| 5835605 | Engine exhaust sound synthesizer An engine exhaust sound synthesizer is fundamentally configured by an exhaust waveform creating unit and an exhaust pipe circuit. The exhaust waveform creating unit creates an exhaust waveform signal based on accel information and engine speed information... | 11/10/1998 |
| 5828763 | Speaker system including phase shift such that the composite sound wave decreases on the principal speaker axis A speaker system for reproducing a high fidelity sound field. In one embodiment, the speaker system includes at least two speakers, one of which is coupled with a phase shifter for shifting the phase of an audio signal in mid- and high-frequency ranges. T... | 10/27/1998 |
| 5828755 | Method and device for processing signals A method is set forth for processing signals, in particular for treating audio signal, characterized in that it mainly consists in the supply of an input signal (3) to be treated; in the isolation of a number of signals (5) from the input signal (3) which... | 10/27/1998 |
| 5820442 | Super sound engine/transmission sound enhancer The present invention relates to an electronic engine sound duplicator simulator used in combination with an internal combustion motor, a battery, and an alternator. The sound duplicator simulator includes a motor rpm sensor, a sound duplicator microproce... | 10/13/1998 |
| 5812677 | Acoustic signal processing method and apparatus Main voice processing is performed on an acoustic signal at a basic sampling frequency fs within one period of the basic sampling frequency fs to allow the main voice processing implemented acoustic signal to undergo down-sampling for implementing voice p... | 09/22/1998 |
| 5812772 | Multi-media communication system and method therefor A multi-media communication system has a data transmitter and communication terminals. Each communication terminal has a communication interface for communicating with the data transmitter via control signals, and a buffer for storing multi-media data. Th... | 09/22/1998 |
| 5812688 | Method and apparatus for using visual images to mix sound A method and apparatus for mixing audio signals. Each audio signal is digitized and then transformed into a predefined visual image, which is displayed in a three-dimensional space. Selected audio characteristics of the audio signal, such as frequency, am... | 09/22/1998 |
| 5805713 | Solid state circuit for emulating push-pull tube amplifier A solid state emulation of vacuum tube amplifiers and more particularly to the emulation of push-pull output stages. This application focuses on the emulation of grid conduction by the output tubes and their non-linear transconductance.... | 09/08/1998 |
| 5802182 | Audio process distortion The audio process is a signal path having a plurality of filters connected or including distortion means. The prime example of this phenomenon surrounds inductances such as found in magnetic tape recorders, spring reverberators, and transformers. The indu... | 09/01/1998 |
| 5783766 | Musical sound producing device in electronic musical instrument A musical sound producing device in an electronic musical instrument of stereophonic sampling system, including: an oscillator using status memory for storing each order of right and left oscillators which are being used for sound production, in accordanc... | 07/21/1998 |
| 5771296 | Audio circuit An audio circuit for use in a television receiver and the like compensates for the capacity shortage of a speaker box or low frequency characteristic of the speaker to reproduce vivid and voluminous low frequency sound. L and R signals of the audio signal... | 06/23/1998 |
| 5768396 | Online karaoke system with flying start performance A karaoke system of an online type is comprised of a karaoke station for sounding a karaoke performance according to a performance data, and a host station for supplying the performance data to the karaoke station in response to a request. The host statio... | 06/16/1998 |
| 5765134 | Method to electronically alter a speaker's emotional state and improve the performance of public speaking The invention addresses the problem of undesirble emotional states in general, and during the performance of public speaking in particular. The user of the invention wears a microphone and earphones. The invention digitally alters how the user hears his o... | 06/09/1998 |
| 5761317 | Tube amplifier fat emulation structure This disclosure shows the solid state emulation of elements of a thermionic emission device amplifier which distinguish it from solid state amplifiers: the output impedance of transformer impedance with plate resistance, the transfer function coupling fro... | 06/02/1998 |
| 5761316 | Variable and reactive audio power amplifier This disclosure shows the solid state emulation of elements of a thermionic emission device amplifier which distinguish it from solid state amplifiers: the output impedance of transformer impedance with plate resistance, the transfer function coupling fro... | 06/02/1998 |
| 5757931 | Signal processing apparatus and acoustic reproducing apparatus A signal input at an input terminal (1) is divided into signals of two systems, and the signal of one system is supplied to a low-pass filter (2) and then fed to a downsampling processor (3). The downsampled signal is superimposed with an impulse response... | 05/26/1998 |
| 5754666 | Method for reproducing audio signals and an apparatus therefore When reproducing an audio signal with a conventional audio signal reproducing system, an unnaturalness in the quality of the reproduced sound occurs. The unnaturalness is caused by the frequency spectrum of the reproduced sound which is decreased or cut o... | 05/19/1998 |
| 5750914 | Electronic musical instrument having an effect data converting function Effect data designating a desired sound effect is introduced from the outside, and a tone generator generates a tone imparted with an effect based on the introduced effect data. A conversion table is provided which classifies predetermined effects imparta... | 05/12/1998 |
| 5748756 | Entertainment system with sound storage cartridge and playback device An entertainment system includes a cartridge provided with read-only memory (ROM) for storing digital data therein in accordance with predetermined addresses, and a player device structured to receive the cartridge therein. The player device is provided w... | 05/05/1998 |
| 5748747 | Digital signal processor for adding harmonic content to digital audio signal A digital audio signal processor for adding harmonic content to an input audio signal through a non-linear transfer function with discontinuities. The discontinuities are generated by bit shifting each input value by an amount dependent on the sign and ma... | 05/05/1998 |
| 5742688 | Sound field controller and control method A sound field controller of the invention reproduces a sound field which provides a distance perspective depending on a position of a sound image for a listener. The sound field controller includes: an A/D converter; a signal processing section for proces... | 04/21/1998 |
| 5734725 | Tube emulator amplifier system This invention is an emulation of vacuum tube guitar amplifier with devices that emulate vacuum tube plate voltage and current characteristics. This amplifier system has a switching system for selecting preamplifiers and which alters the behavior of the o... | 03/31/1998 |
| 5734726 | Device and method for controlling digitally-stored sounds to provide smooth acceleration and deceleration effects A device and method for producing sound which simulates the sound of an engine, whereby sound segments are digitally stored in memory and accessed by a microcontroller which is responsive to a user accessible switch. When the switch is activated and the d... | 03/31/1998 |
| 5727069 | Solid state musical instrument amplifier with vacuum tube signal magnitude limiting A musical instrument amplifier has all solid state amplification stages but incorporates a pair of vacuum tube signal magnitude limiters to provide vacuum tube type sound when the amplifier is operating in a nonlinear condition. The vacuum tubes are conne... | 03/10/1998 |
| 5719944 | System and method for creating a doppler effect System and method for creating a Doppler Effect signal in a virtual reality environment. A host produces: (1) an audio signal indicative of sound produced by a sound source, (2) a first set of signals indicative of a velocity of the sound source and an ob... | 02/17/1998 |
| 5705950 | Hybrid solid state/vacuum tube audio amplifier In this hybrid amplifier circuit the vacuum tube is direct coupled or DC coupled to the output of a solid state amplifier in a cathode follower configuration. An automatically operative bypass component, such as a Zener diode, LED, transistor junction or ... | 01/06/1998 |
| 5703956 | External memory control circuit for sound field processing digital signal processor An external memory control circuit for a sound field processing digital signal processor capable of obtaining continuous sound listening by shortening the time that sound is cut off upon a change of the sound field algorithm depending on the listening pla... | 12/30/1997 |
| 5703312 | Electronic musical instrument and signal processor having a tonal effect imparting function There are provided a tone source for generating tone signals in plural channels independently and effect impartment sections, provided in corresponding relations to the channels, for imparting individual effects to the tone signals of the channels generat... | 12/30/1997 |
| 5698807 | Digital sampling instrument An electronic music system which imitates acoustic instruments addresses the problem wherein the audio spectrum of a a recorded note is entirely shifted in pitch by transposition. The consequence of this is that unnatural formant shifts occur, resulting i... | 12/16/1997 |
| 5696834 | Stereo system and stereo method for electronic acoustical system According to the invention, sound data is distributed as a plurality of sound data, and the distributed sound data are combined to obtain a plurality of synthesized sound data. The synthesized sound data are sounded by a plurality of speakers, thus formin... | 12/09/1997 |
| 5687240 | Method and apparatus for processing discontinuities in digital sound signals caused by pitch control Small discontinuities in digital sound data caused by a pitch control operation are processed by using a secondary FIR filter and smoothing the discontinuities. When lowering the key, the data value subject to the pitch down operation is moderately approx... | 11/11/1997 |
| 5687105 | Processing device performing plural operations for plural tones in response to readout of one program instruction A digital signal processor (i.e., DSP) is employed by an electronic musical instrument. The contents of operational processes to be executed by the DSP can be arbitrarily set in accordance with filtering operations of the filters to be realized. A process... | 11/11/1997 |
| 5682433 | Audio signal processor for simulating the notional sound source An Audio Signal Processing system in which gain values are calculated for a plurality of output channels so that, from a notional listening position, a notional sound source may be perceived as being positioned anywhere within a notional listening space. ... | 10/28/1997 |
