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8180062 |
Spatial sound zooming
Aspects of the invention provide methods, computer-readable media, and apparatuses for digital processing of acoustic signals to create a reproduction of a natural or an artificial spatial sound...
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8160260 |
Circuit and program for processing multichannel audio signals and apparatus for reproducing same
A circuit for processing multichannel audio signals, comprises a frequency characteristics correction device and an output device. The frequency characteristics correction device corrects frequency...
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8139798 |
Sound reproducing apparatus
A sound reproducing apparatus is provided with a circuit comprising a first secondary phase shifter in a front stage of at least one of channels among a first power amplifier, a second power...
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8139774 |
Multi-element directional acoustic arrays
An audio system including a left input channel signal, a right input channel signal, and a discrete center input channel. Circuitry removes correlated content from the left input channel signal and...
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8130988 |
Method and apparatus for reproducing audio signal
An audio signal is supplied to a loudspeaker array to perform wavefront synthesis. A virtual sound source is produced at an infinite distance using wavefront synthesis. A propagation direction of a...
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8126173 |
System and method for expanding multi-speaker playback
A method includes splitting and filtering a left input signal and a right input signal to produce a plurality of frequency sub-bands. Each of the frequency sub-bands includes a left sub-band signal...
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RE43132 |
Volume control for audio signals
A motion picture soundtrack reproduction system has a center front soundtrack channel and a plurality of other soundtrack channels. A volume control adjusts the gain of all the channels. The volume...
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8086334 |
Extraction of a multiple channel time-domain output signal from a multichannel signal
A digital signal processing system and method transforms pairs of channels selected from a multichannel signal into the frequency domain. Vector operations are performed upon the frequency-domain...
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8077474 |
Variable equalizer apparatus
A variable equalizer apparatus for forward and/or reverse equalizers in an amplifier. The system can include a structure to allow continuous contact of the signal flow as an equalizer is removed;...
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8045719 |
Rendering center channel audio
An audio upmixer, such as a two-channel to three-channel upmixer, employs a difference in a measure of sound at the ears of a listener in accordance with first and second models, one based on a...
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8031879 |
Sound processing system using spatial imaging techniques
A sound processing system reduces the instances when only a center speaker is heard. The gain of a volume setting is adjusted for individual speakers in response to one or more input signals. The...
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8000485 |
Virtual audio processing for loudspeaker or headphone playback
There are provided methods and an apparatus for processing audio signals. According to one aspect of the present invention there is included a method for processing audio signals having the steps...
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7978865 |
Audio processing apparatus
An audio processing apparatus comprising: channel determination section for determining which one of a combination of the first left audio signal and the first right audio signal and a combination...
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7970144 |
Extracting and modifying a panned source for enhancement and upmix of audio signals
Modifying a panned source in an audio signal comprising a plurality of channel signals is disclosed. Portions associated with the panned source are identified in at least selected ones of the...
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7945054 |
Method and apparatus to reproduce wide mono sound
A wide mono sound reproducing method and apparatus to widen mono sound by using 2 channel speakers. The method include separating an input mono sound signal into a plurality of decorrelated...
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7920710 |
Loudspeaker apparatus
An array loudspeaker is constructed by stacking loudspeaker rows in a plurality of stages, each of the loudspeaker rows being formed by arranging loudspeaker elements in the form of a horizontal...
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7903823 |
Apparatus and method for effecting sound stage expansion
An apparatus for effecting sound stage expansion in an audio system presenting two sound channels includes: (a) A first signal source coupled for providing at least one first signal representing a...
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7894611 |
Spatial disassembly processor
Two-channel input audio signals are processed to construct output audio signals by decomposing the two-channel input audio signals into a plurality of two-channel subband audio signals. Separately,...
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7813824 |
Transmission signal processing device for video signal and multi-channel audio signal, and video and audio reproducing system including the same
A transmission signal processing device 10 includes a transmission signal data demultiplexing circuit RX for receiving multiplexed transmission signal data and demultiplexing the transmission...
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7796766 |
Audio center channel phantomizer
The invention relates to a method of processing an input signal into a phantomized signal, including adding at least one attenuated delayed signal to the input signal, the phantomized signal having...
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7760886 |
Apparatus and method for synthesizing three output channels using two input channels
For synthesizing at least three output channels using two stereo input channels, the stereo input channels are analyzed to detect signal components occurring in both input channels. A signal...
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7756275 |
Dynamically controlled digital audio signal processor
A system and method for processing multiple channel audio signals to create a realistic soundscape in a space largely independent of the number of loudspeakers and audio source channels is...
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7668317 |
Audio post processing in DVD, DTV and other audio visual products
The method and system of present invention sequences audio post-processing algorithms to simulate live or theater sound. An audio signal is selectively post-processed according to equipment...
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7630500 |
Spatial disassembly processor
A method of disassembling a pair of input signals L(t) and R(t) to form subband representations of N output channel signals o1(t), o2(t), . . . , oN(t), wherein t is time. The method includes the...
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7561706 |
Reproducing center channel information in a vehicle multichannel audio system
A vehicle sound system is constructed and arranged to establish a sound image at a desired location spaced from the sound source.
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7558393 |
System and method for compatible 2D/3D (full sphere with height) surround sound reproduction
A system and method of producing an output sound field that is representative of an input sound field compatible with both existing prior art sound reproduction systems, for example ITU 5.1/6.1,...
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7542815 |
Extraction of left/center/right information from two-channel stereo sources
A digital audio signal processing system and method transforms two-channel stereo time-domain data into the frequency domain. Vector operations are performed upon the frequency-domain data by which...
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7490044 |
Audio signal processing
An audio system for processing two channels of audio input to provide more than two output channels. The input may be conventional stereo material or compressed audio signal data. The audio...
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7457421 |
Circuit and program for processing multichannel audio signals and apparatus for reproducing same
A circuit for processing multichannel audio signals, comprises a frequency characteristics correction device and an output device. The frequency characteristics correction device corrects frequency...
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7443987 |
Discrete surround audio system for home and automotive listening
A sound processing system increases the robustness of surround sound in various playback situations. The system may process an incoming signal, such as a five channel surround sound signal, with a...
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7369666 |
Audio reproducing system
High and low frequency components Cn1, Cn2 are generated by causing a center channel audio signal Cn to pass through a high-pass filter HPF and a low-pass filter LPF, and the high frequency...
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7251337 |
Volume control in movie theaters
A motion picture soundtrack reproduction system has a center front soundtrack channel and a plurality of other soundtrack channels. A volume control adjusts the gain of all the channels. The volume...
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7251333 |
Method and apparatus for creating a virtual third channel in a two-channel amplifier
A method and apparatus for creating a third signal channel from an input signal received in each of a first and second channel involves inverting a predetermined frequency range of signals in the...
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7231053 |
Enhanced multi-channel audio surround sound from front located loudspeakers
In a loudspeaker system with main and sub-speakers, a modified and inverted left surround signal is added to the signals driving the right main speaker and a modified and inverted right surround...
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7212872 |
Discrete multichannel audio with a backward compatible mix
A multichannel audio format provides a truly discrete as well as a backward compatible mix for surround-sound, front or other discrete audio channels in cinema, home theater, or music environments....
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7206413 |
Sound processing system using spatial imaging techniques
A sound processing system reduces the instances when only a center speaker is heard. The gain of a volume setting is adjusted for individual speakers in response to one or more input signals. The...
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7164770 |
Surround sound speaker system
The present invention uses multivoice coil drivers in conjunction with the small satellite speakers of multichannel surround sound systems to achieve an overall linear response between 100 Hz to...
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7158642 |
Method and apparatus for producing a phantom three-dimensional sound space with recorded sound
A central speaker and personal headset speakers are used to create a three-dimensional phantom sound space for each listener. The speakers of the headset are located in close proximity to, but do...
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7110550 |
Sound system
The present invention was developed in order to realize a multi-channel sound system wherein appropriate output (balance and fader) control can be conducted without adversely affecting the program...
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7082201 |
Three-dimensional sound reproducing apparatus and a three-dimensional sound reproduction method
A three-dimensional sound reproducing apparatus is configured by cascading a sound field effect adding unit and a crosstalk canceling unit. The sound field effect adding unit adds a predetermined...
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7003119 |
Matrix surround decoder/virtualizer
The inventive mechanism uses several sub-systems to generate outputs from the stereo input signal. A first sub-system synthesizes the phantom center output, which places the monaural center image...
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6937737 |
Multi-channel audio surround sound from front located loudspeakers
A surround sound reproduction system uses a series of filters and a system of main and sub-speakers to produce phantom rear surround sound channels or a phantom surround sound effect from a...
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6931134 |
Multi-dimensional processor and multi-dimensional audio processor system
A multi-dimensional audio processor receives as an input either a single channel signal or a two channel signal from an audio signal source; for example a musical instrument or an audio mixer. The...
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6925184 |
Method for converting two-channel audio system into multichannel audio system and an audio processor thereof
The present invention provides a method to convert the conventional two-channel uncoded audio system into multichannel system. There is no coding/decoding procedure in the invention, but just...
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6918461 |
Dual mono center channel
A pair of matched monaural speakers are added inside conventional left and right stereo speaker housings so that the left, right and flat panel monitor appear joined in a seamless aesthetic effect....
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6914988 |
Audio reproducing device
An audio reproducing device includes an input for receiving an n-channel input signal, an output for supplying an 1-channel output signal to 1 loudspeakers, and an audio processing unit for...
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6909787 |
Method and related apparatus for stereo vocal cancellation
Method and related apparatus for canceling vocal portions containing in two signals of two stereo channels and providing two corresponding output signals. The method includes: generating a mono...
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6870933 |
Stereo audio processing device for deriving auxiliary audio signals, such as direction sensing and center signals
An audio signal processing device is described for deriving auxiliary audio signals, such as audio direction sensing signals or a center audio signal from first and second audio signals through...
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6853732 |
Center channel enhancement of virtual sound images
The present invention disclosed and claimed herein, in one aspect thereof, comprises a method for enhancing the front sound image during reproduction in a listening space of a stereo sound program,...
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6819767 |
Speaker unit and sound reproduction apparatus using the same
A sound reproduction apparatus includes a left channel speaker apparatus for receiving a left-channel sound output signal of a sound source, a right channel speaker apparatus for receiving a...
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