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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...
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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,...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 to...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 circuit...
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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...
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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...
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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...
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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...
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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...
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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...
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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.
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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 imparted...
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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...
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4815132 |
Stereophonic voice signal transmission system
In a stereophonic voice transmission system for transmitting voice signals of a plurality of channels, a transmitting end encodes main data consisting of at least one channel voice signal among a...
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4815131 |
Digital audio channel selection circuit
A digital audio channel selection circuit for a serial audio signal having two multiplexed channels. The digital signal is converted from digital to analog and applied to two separate sample and...
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4815133 |
Sound field producing apparatus
A sound field producing apparatus operatively connected to a stereophonic sound source and adapted to supply audio signals to a loudspeaker system, comprising an indirect sound extracting circuit...
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4807217 |
Multi-channel stereo reproducing apparatus
The present invention provides a multi-channel stereo reproducing apparatus which can reproduce a recording medium such as an audio disc or the like in which in order that users can enjoy screen...
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4803727 |
Transmission system
A stereo coding system is described in which 7 kHZ bandwidth sum (L+R) and difference (L-R) signals are converted to digital form (11 and 12). The difference signal is then bandlimited (13) to 2...
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4792974 |
Automated stereo synthesizer for audiovisual programs
Surround stereo signals are synthesized from the composite or DME monaural sound tracks of audiovisual programs by use of multi-channel, computer-controlled digital circuitry and...
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4790014 |
Low-pitched sound creator
An analog sound signal is outputted. Low-frequency components are selected from the outputted analog sound signal so that a low-pitched sound signal is derived from the analog sound signal. A key...
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4782530 |
Non-recursive system for expanding the stereo base of stereophonic acoustic diffusion apparatus
A first and a second input signals, composing a stereophonic pair, are amplified in respective channels, added by adder means in a desired phase relationship, chosen between completely in phase and...
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4736426 |
Graphic balancer
The present invention provides a graphic balancer comprising, in units of bands, level adjusting means (operational amplifiers 1L and 1R, resonators 2L and 2R, and volume controls 3L and 3R) for...
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4700389 |
Stereo sound field enlarging circuit
In a stereo sound field enlarging circuit, signals A and B applied to left and right input terminals are suitably processed so that signals A' and B' represented by the following equations are...
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4698842 |
Audio processing system for restoring bass frequencies
An audio processing system for injecting left and right channel audio signals with a signal having a fundamental frequency component that is half the frequency of the highest amplitude low...
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4696035 |
System for expanding the stereo base of stereophonic acoustic diffusion apparatus
A first and a second input signal, constituting a stereophonic pair are amplified in respective direct amplifier means so as to obtain a first and a second output signal. In order to obtain the...
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4648113 |
Method and apparatus for providing a visual indication of a relationship between two signals
A visual indication of the relationship between first and second electrical signals, such as the left and right channel signals in a stereophonic audio system, is provided through use of a video...
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4646150 |
Apparatus and method for stereo television sound
An apparatus and method are provided for receiving and reproducing stereo television sound. A transmitted television signal is received that contains a first component comprising the sum of first...
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4642812 |
Sound field enlarging device and method
A method for performing sound field enlargement in a digital audio reproducing apparatus such as a compact disc player. A sum is calculated between each received pair of right-channel and...
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4635288 |
Electrical signal mixing apparatus
Electrical signal mixing apparatus for recording studio or live performance comprising a plurality of input channels having means for conditioning input signals applied thereto, a plurality of...
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4630298 |
Method and apparatus for reproducing sound having a realistic ambient field and acoustic image
Apparatus for reproducing sound having a realistic ambient field and acoustic image is used in a stereophonic sound reproduction system having a left channel output and a right channel output. A...
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4622878 |
Stereophonic system for electronic organs
A stereophonic electronic organ system having two electrical-acoustic channels each including a loudspeaker separated from the other, note generating means for producing for each note in a musical...
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4612663 |
Multichannel audio reproduction system
A multichannel reproduction system for use with a source providing left (L) and (R) signals includes circuitry for developing difference signals L-R and R-L which are delivered to individual ones...
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4611226 |
Television receiver incorporating a processing section for processing stereo/multichannel-sound signals
A processing section for a television receiver for processing stereo/dual sound signals having a first sound carrier modulated by a first sound signal, and a second sound carrier modulated both by...
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