Quotables
"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7508947 | Method for combining audio signals using auditory scene analysis A process for combining audio channels combines the audio channels to produce a combined audio channel and dynamically applies one or more of time, phase, and amplitude or power adjustments to the channels, to the combined channel, or to both the channels and the co... | 03/24/2009 |
| 7382885 | Multi-channel audio reproduction apparatus and method for loudspeaker sound reproduction using position adjustable virtual sound images A multi-channel audio reproduction apparatus and method for loudspeaker reproduction using virtual sound images whose positions can be adjusted is provided. The multi-channel audio reproduction apparatus includes a virtual sound image forming unit for compensating f... | 06/03/2008 |
| 7330552 | Multiple positional channels from a conventional stereo signal pair A method and system accept left and right channel inputs of audio data and provide output audio data for at least three channels in a fashion that may effect a facsimile of the original soundstage on which the left and right inputs were recorded. ... | 02/12/2008 |
| 7330555 | Coding device and method, and recording medium An L-channel signal and an R-channel signal are input into a subtractor in which the difference between the L-channel signal and the R-channel signal is determined. The resulting signal is input into first and second multipliers. In the first multiplier, a mixed out... | 02/12/2008 |
| 7289633 | System and method for integral transference of acoustical events A sound system for capturing and reproducing sounds produced by a plurality of sound sources. The system comprises a device for receiving sounds produced by the plurality of sound sources and converting the separately received sounds to a plurality of separate audio... | 10/30/2007 |
| 7280664 | Method for apparatus for audio matrix decoding A method derives at least three audio signals, each associated with a direction, from two input audio signals. In response to the two input signals, a passive matrix generates a plurality of passive matrix audio signals, including two pairs of passive matrix audio s... | 10/09/2007 |
| 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 control has a range of settings from a minimum to a maximum, the gai... | 07/31/2007 |
| 7231054 | Method and apparatus for three-dimensional audio display This invention addresses sound recording and mixing methods for 3-D audio rendering of multiple sound sources over headphones or loudspeaker playback systems. Economical techniques are provided, whereby directional panning and mixing of sounds are performed in a mul... | 06/12/2007 |
| 7138576 | Sound system and method for creating a sound event based on a modeled sound field A sound system and method for modeling a sound field generated by a sound source and creating a sound event based on the modeled sound field is disclosed. The system and method captures a sound field over an enclosing surface, models the sound field and enables repr... | 11/21/2006 |
| 7099373 | Noise shaping technique for spread spectrum communications A spread spectrum noise shaper uses a modulation technique to achieve a greater signal-to-noise or signal-to-interference ratio (SNR or SIR). The technique doubles the system SIR, in principle. This doubling yields a doubling in system capacity. SNR is increased by ... | 08/29/2006 |
| 7085387 | Sound system and method for capturing and reproducing sounds originating from a plurality of sound sources A sound system for capturing and reproducing sounds produced by a plurality of sound sources. The system comprises a device for receiving sounds produced by the plurality of sound sources and converting the separately received sounds to a plurality of separate audio... | 08/01/2006 |
| 6970567 | Method and apparatus for deriving at least one audio signal from two or more input audio signals A multidirectional audio decoder using an “adaptive” audio matrix derives at least one of a plurality of output audio signals from two or more directionally-encoded audio input signal streams (S1(α), S2(α), . . . SN(α), wherein α is the encoded... | 11/29/2005 |
| 6956497 | Method and apparatus for sending presence messages An intentional presence system in accordance with the present invention includes a transmitting device at a first physical location that is responsive to a command intentionally initiated by a first individual at the first physical location to develop a presence sig... | 10/18/2005 |
| 6920223 | Method for deriving at least three audio signals from two input audio signals Various equivalent adaptive audio matrix arrangements are disclosed, each of which includes a feedback-derived control system that automatically causes the cancellation of undesired matrix crosstalk components in the matrix output. Each adaptive audio matrix arrange... | 07/19/2005 |
| 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 processing the input signal. The audio processing unit a signal enhancer for... | 07/05/2005 |
| 5790500 | Apparatus for recording/reproducing converted four-channel audio signals A recording and reproducing system is arranged to record converted two-channel audio signals obtained by using all four-channel stereophonic audio signals and audio signals of two specific channels included in the four-channel stereophonic audio signals o... | 08/04/1998 |
| 5677957 | Audio circuit producing enhanced ambience A circuit for use in connection with a stereo audio system to increase the ambience includes a differencing circuit for receiving a left stereo input and a right stereo input. The differencing circuit produces an output signal having a difference of the l... | 10/14/1997 |
| 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 speakers (6 to 10) corresponding to these channels. The telev... | 06/12/1990 |
| 4589129 | Signal decoding system A signal decoding system for use in a quadraphonic type sound reproducing system is disclosed. In accordance with one aspect of the invention, a multiband expander is used to control the steering of the four information signals decoded from the two input ... | 05/13/1986 |
| 4204091 | Cancellation of interference distortions caused by intermodulation between FM signals on adjacent channels A crosstalk cancellation circuit includes a pair of input terminals to which interference affected FM signals are applied and a pair of output terminals from which distortionless demodulated signals are delivered. For each transmission channel an envelope... | 05/20/1980 |
| 4152542 | Multichannel matrix logic and encoding systems Apparatus and methods relating to "quadrasonic" encoding and decoding systems, including synthetic supplementary channel systems, matrix logic systems, and systems employing stereo compatible matrix variations.... | 05/01/1979 |
| 4151369 | Sound reproduction systems A basic decoder designed to feed signals to at least three loudspeakers disposed at respective azimuths around a reference point at equal distances therefrom is modified to make it suitable for feeding loudspeakers at the same azimuths but at non-uniform ... | 04/24/1979 |
| 4096353 | Microphone system for producing signals for quadraphonic reproduction A system including a compact array of microphones and signal-combining circuitry, especially suited for use with surround-sound sources, for producing two composite output signals corresponding to those required by a matrix-type quadraphonic system to est... | 06/20/1978 |
| 4086433 | Sound reproduction system with non-square loudspeaker lay-out In a sound reproduction system of the type which enables the listener to distinguish sound from sources extending over 360° of azimuth, compensation is provided for the asymmetry arising when four loudspeakers are located at the corners of a non-square r... | 04/25/1978 |
| 4034158 | Quadraphonic passive four-channel decoder A quadraphonic decoder is described for providing connections between a stereo amplifier and four loudspeakers. Two signals each comprising in-phase and out-of-phase components are applied from the amplifier to the speakers by the decoder so that these fo... | 07/05/1977 |
| 3997725 | Multidirectional sound reproduction systems In a sound reproduction system of the type which enables the listener to distinguish sound from sources extending over 360° of azimuth, compensation is provided for the asymmetry arising when four loudspeakers are located at the corners of a non-square r... | 12/14/1976 |
| 3980832 | Decoder for four channel FM stereophonic composite signal having an Indicating signal wherein the indicating signal is detected and used in the decoding of the four channel composite signal A decoder is provided for four channel FM stereophonic composite signals including a first pilot signal, a main channel signal, a first sub-channel signal suppressed carrier amplitude modulated on a first subcarrier having a frequency twice that of the fi... | 09/14/1976 |
| 3958085 | Compatible 4-2-4 encoding-decoding system A four channel stereophonic sound system requiring only two transmission channels and two audio amplifiers is disclosed wherein two different linear combinations of all four original discrete signals are recorded or transmitted, amplified and subsequently... | 05/18/1976 |
| 3934086 | Matrix four-channel decoding system To the output side of a matrix four-channel decoder for producing four outputs while controlling the mixing coefficients of left and right composite signals in accordance with the level or instantaneous amplitude relationship between directional audio inp... | 01/20/1976 |
