Match Document Document Title
5384856 Acoustic system  
In a digital channel divider of the present invention, a plurality of filters are connected in parallel, which can set a desired transmission frequency response optionally for a digital input...
5381482 Sound field controller  
A sound field controller for generating apparent sound sources by adjusting the amplitude and delay time of a sound signal so that the sound will be perceived by plural listeners as sound coming...
5343531 Audio reproducing apparatus  
A vocal sound can be erased by a simple arrangement. An audio reproducing apparatus in which a sum signal and a difference signal of left and right signals of a stereophonic signal are supplied...
5341457 Perceptual coding of audio signals  
A technique for the masking of quantizing noise in the coding of audio signals is adapted to include geometric interpolation between the thresholds for a tone masking noise and for noise masking a...
5333200 Head diffraction compensated stereo system with loud speaker array  
A stereo audio processing system for a stereo audio signal processing reproduction that provides improved source imaging and simulation of desired listening environment acoustics while retaining...
5333199 Digital signal processor for simultaneously processing left and right signals  
A data input/output circuit of a digital signal processor of the invention includes a converter circuit for serial-parallel conversion of data, an R-channel dedicated input latch circuit, two...
5325435 Sound field offset device  
A sound field offset device having two channels, each of which includes a frequency selection filter for dividing a stereophonic input signal into two frequency bands by a given frequency falling...
5278909 System and method for stereo digital audio compression with co-channel steering  
Left right and surround components of a stereo signal are coded into a monaural and small co-channel providing volume steering for recreating a stereo effect with a substantially reduced bit rate....
5274708 Digital stereo sound enhancement unit and method  
A method and apparatus for processing digital stereo signals in a stereo system having a left and right channel in which digital information corresponding to the left and right channels is read...
5272756 Method and apparatus for determining phase correlation of a stereophonic signal  
A method and apparatus used for determining phasing correlation between left-channel and right-channel signals of a stereophonic audio signal is provided. The determination of the phase...
5265166 Multi-channel sound simulation system  
A multi-channel sound simulation system for processing a stereophonic signal having a high frequency component for use with at least a pair of primary loudspeakers and a pair of secondary...
5263086 Audio accessory circuit  
The gain of the frequency components in a given band of the difference signal between stereophonic input L and R channel signals is desirably changed and is added to the input L and R channel...
5251260 Audio surround system with stereo enhancement and directivity servos  
A audio surround system particularly arranged for use in a theater provides the enhanced ambience and wide sound image advantages of a stereo enhancement system (SRS system) having directivity...
5228085 Perceived sound  
A stereo audio system includes a plurality of drivers and a signal processor circuit. The signal processing circuit has at least a left channel input and a right channel input, and provides at...
5222156 Object information processing apparatus  
An object information processing apparatus includes a focussing unit for focussing light information from an object point; a light transmission unit for transmitting the light information from the...
5189703 Timbre correction units for use in sound systems  
Spectral imbalance when playing home video versions of motion pictures is overcome by a frequency response correction unit which compensates for the equalization employed during the production of...
5164840 Apparatus for supplying control codes to sound field reproduction apparatus  
Control codes for controlling processing of an audio signal by a sound field variation circuit to produce desired sound fields are recorded on a monaural track of a video tape concurrent with...
5165099 Balance control circuit  
The balance of the volumes in right and left channels in a stereo play back system is controlled. The amount of attenuation of an attenuator provided in each channel is controlled. When the levels...
5161196 Apparatus and method for reducing motion sickness  
An artificial horizon of sound is maintained in an enclosure which is irregularly moving in a manner which may induce motion sickness of its occupant(s), by positioning sound emitters in spaced...
5153362 Electronic musical instrument having pan control function  
An electronic musical instrument having a pan control function includes a pan device for deciding a synthesizing rate of the plural wave form elements in each of the musical tone output terminals...
5140637 Device and method for removing vocal signals  
A vocal signal removing device includes a member for connecting one of the left or right side positive output terminals of a stereophonic sound reproducing device, e.g., tape, compact disk, or...
5136650 Sound reproduction  
A sound reproduction system for converting encoded stereo signals on input channels A and B into signals on left, supplemental left, right, and supplemental right output channels, respectively,...
5121433 Apparatus and method for controlling the magnitude spectrum of acoustically combined signals  
An apparatus and method for providing a sound field to an auditorium or the like is disclosed. The preferred embodiment of the apparatus utilizes random phase shifts to counter the effects of...
5119420 Device for correcting a sound field in a narrow space  
A sound field correcting device provides for a natural acoustic localization of the outputs of right and left channels of an acoustic sound source. At least one of right and left channel audio...
5109416 Dipole speaker for producing ambience sound  
A dipole speaker for use with a multichannel sound reproduction system for producing an acoustical ambience signal. The dipole speaker comprises a transducer which is connected to the sound...
5109415 Audio signal processing system performing balance control in both amplitude and phase of audio signal  
Disclosed therein is an audio signal processing system for performing a balance control, which includes an attenuator for performing an amplitude attenuation operation on the designated channel...
5099739 Musical tone generating aparatus  
The musical tone generating apparatus includes at least a waveform memory for storing waveform data, a stereophonic effect giving portion, left and right sound systems. The stereophonic effect...
5095506 Sound reproduction system utilizing sound extinction device  
A silencer to be disposed near a listener (primarily his head, in a playback sound fiel. The silencer consists of a silencing member and a support member, and provides body sensing vibration...
5065432 Sound effect system  
An audio signal processing apparatus for processing an audio signal. The apparatus includes an audio signal input circuit into which the audio signals are input, an analyzer which analyzes the...
5056148 Output circuit of audio device  
An output circuit of a stereo type audio device includes a switch state detection switch which responds to an open state of a normally closed internal switch of an output jack of a first channel...
5042068 Audio spatial equalization system  
A television receiver includes a stereo amplifier having separate bass, treble and gain controls, for driving left and right channel loudspeakers. Separate bandpass circuits supply portions of the...
5023913 Apparatus for changing a sound field  
An apparatus for changing a sound field, comprising at least two signal processing means, which can smoothly and continuously switch a sound field into an arbitrary sound field without a break of...
5020098 Telephone conferencing arrangement  
A high-fidelity audio telephone conferencing arrangement which provides talker position information is economically provided between telephone stations over a single standard digital telephone...
4984273 Enhancing bass  
A circuit controls the sound pressure level produced by a separate bass transducer in a multi-channel audio system having a number of upper frequency channels such that the perceived frequency...
4982437 Method of cutting an object as a function of particularities of said object  
A method of cutting a sheet 1 with a tool controlled by a computer system and in accordance with a cutting program that may depend on certain particularities of the sheet. The computer system...
4980914 Sound field correction system  
A sound field correcting system for correcting for mulitpath frequency-characteristic distortion in an acoustic reproducing system. In one embodiment, the level and delay of an original signal are...
4972482 Fm stereo demodulator  
Levels of a stereo sum signal and a stereo difference signal are detected by first and second level detectors (7, 9), respectively. Outputs of the first and second level detectors (7, 9) are...
4953212 Auto voice changing apparatus  
An auto voice changing apparatus receives music from a stereo or multi-sound, digital or analog recording and either plays the recorded music as is, or uses the recorded music as instrumental...
4933768 Sound reproducer  
A television receiver includes a volume control circuit (4) for controlling levels of sound signals corresponding to a left channel, a right channel, a center channel and a surround channel and...
4910778 Signal enhancement processor for stereo system  
The enhancement processor disclosed herein includes left and right channels through which the components of the stereo signal are fed, and a side channel that receives a difference signal derived...
4908858 Stereo processing system  
A stereo processing system which comprises a left channel and a right channel; a filter in each of the channels for separating an audio signal into a plurality of bands; a phase-shift/delay...
4887045 Sum/differential signal processing circuit  
A sum/differential signal processing circuit for use in a sound reproduction system, such as a Dolby surround processing system, includes a pair of operational amplifiers, a resistor connected...
4876719 Synchronizing system for digital apparatus  
A synchronizing system for use with a plurality of digital signal reproducers includes a plurality of digital signal reproducers, each having a digital I/O modulator, a digital I/O demodulator and...
4866774 Stero enhancement and directivity servo  
In a stereo system having sum and difference signals that are processed for stereo image enhancement, apparent directivity of the stereo sound is increased by the use of servo systems (40,44) for...
4856064 Sound field control apparatus  
A sound field control apparatus is provided with a memory storing first and second sound field data; a first digital sound processor convoluting the first sound field data to a sum signal of two...
4841572 Stereo synthesizer  
A stereo image enhancement system, in which difference signal components in relatively quieter difference signal frequency bands are boosted to provide an improved stereo image, is provided with a...
4837824 Stereophonic image widening circuit  
A circuit for providing enhanced stereophonic sound by processing the L-R signal. A compressor which receives the L+R signal provides a gain control signal. This signal controls the level of the...
4831652 Stereo expansion circuit selection switch  
A stereo expansion circuit selection switch includes a transmission gate to cross couple the right and left channels as needed for stereo expansion.
4817149 Three-dimensional auditory display apparatus and method utilizing enhanced bionic emulation of human binaural sound localization  
An artificial, three dimensional auditory display which artificially imparts localization cues to a multifrequency component electronic signal which corresponds to a sound source. The cues...
4817162 Binaural correlation coefficient correcting apparatus  
An acoustic apparatus for correcting the binaural correlation coefficient of a stereo audio signals, particularly for use in automobiles.The signal in at least one of the channels is phase shifted...