Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 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 reproduction of the original channels and the other based on a reproduct... | 10/25/2011 |
| 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 at least one delayed attenuated signal and the input signal. A phant... | 09/14/2010 |
| 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 generator is operative to introduce at least a part of the detected signal ... | 07/20/2010 |
| 7672461 | 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 first channel out of phase with a corresponding frequency range of sig... | 03/02/2010 |
| 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 characteristics of an audio signal of a channel including an audio s... | 11/25/2008 |
| 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 first and a second matrix. The first and second matrices produce outp... | 10/28/2008 |
| 7372968 | Loudspeaker driver An inertial exciter (40) for an acoustic radiator (42), and a loudspeaker incorporating an acoustic radiator and such an exciter. The exciter has a massive member (44); a coupler (56) adapted for attachment to the acoustic radiator (42... | 05/13/2008 |
| 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 component Cn1 is supplied to the center cha... | 05/06/2008 |
| 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 |
| 7327719 | Managing internet protocol unicast and multicast communications A system for managing internet protocol of at least unicast and/or multicast communications over a network has a network interface 20 for interfacing between the network 10 and other parts of the system. An audio compression/decompression and packetisi... | 02/05/2008 |
| 7305097 | Controlling fading and surround signal level Systems and techniques for controlling a surround sound system having multiple input signals and multiple spatially diverse transducers may include defining a first control region and a second control region. When operating in the first control region, a first set o... | 12/04/2007 |
| 7292697 | 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 component Cn1 is supplied to the center cha... | 11/06/2007 |
| 7286676 | Audio apparatus In an audio apparatus 10 to which plural kinds of audio signals of different numbers of channels are input, a sound field control section 3 which performs a sound field control on the audio signals on the basis of a sound field control data is provided... | 10/23/2007 |
| 7266501 | Method and apparatus for accommodating primary content audio and secondary content remaining audio capability in the digital audio production process The invention enables the inclusion of voice and remaining audio information at different parts of the audio production process. In particular, the invention embodies special techniques for VRA-capable digital mastering, accommodation of PCPV/PCA and/or SCRA signals... | 09/04/2007 |
| 7260225 | Method and device for processing a stereo audio signal In a device for processing a stereo audio signal having a first channel and a second channel the stereo signal is at first analyzed to obtain a measure for a quantity of bits required by a coder to code the stereo audio signal using a coding algorithm. The first cha... | 08/21/2007 |
| 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 |
| 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 first channel out of phase with a corresponding frequency range of sig... | 07/31/2007 |
| 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 signal is added to the signals driving the Left Main Speaker for the pu... | 06/12/2007 |
| 7215782 | Apparatus and method for producing virtual acoustic sound In one embodiment, a sound image is generated by applying first and second copies of a first input audio signal to first and second audio channels, respectively, to generate first and second output audio signals for the sound image. Each output audio signal is gener... | 05/08/2007 |
| 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. The additional discrete audio signals are mixed with the existing di... | 05/01/2007 |
| 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 gain of the center speaker is attenuated in relation to the global vol... | 04/17/2007 |
| 7206648 | Multi-channel audio reproducing apparatus A multi-channel audio reproducing apparatus includes several audio power amplifiers, the number of which is less than the number of channels required for the multi-channel format of the input audio signals. The multichannel audio reproducing apparatus also includes ... | 04/17/2007 |
| 7187777 | Sound reproducing system simulating Apparatus for simulating sound properties of audio equipment not physically present in a simulated environment not physically present includes a source of binaurally encoded audio signals processed for loudspeaker reproduction characterizing audio equipment not phys... | 03/06/2007 |
| 7164773 | Vehicle electroacoustical transducing An audio system for a vehicle that includes a first passenger location and a second passenger location, the second passenger location situated behind the first passenger location, the audio system including a first directional audio channel signal source; a surround... | 01/16/2007 |
| 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 above 15 KHz. The multivoice coil drivers are designed to respond only ... | 01/16/2007 |
| 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 not isolate, the ears of the listener such that external sounds are al... | 01/02/2007 |
| 7136346 | Record carrier method and apparatus having separate formats for a stereo signal and a data signal A record carrier carries a stereo signal and a data signal which includes a first data portion and a remaining data portion. A first channel on the record carrier includes a composite signal which is obtained by combining the stereo signal and the first data portion... | 11/14/2006 |
| 7136712 | Digital acoustic reproducing apparatus, acoustic apparatus and acoustic reproducing system In a digital acoustic reproducing apparatus 10 for selecting and outputting one sound information from a sound information source 11 having plural kinds of sound information with at least the number of channels or different data formats, there are prov... | 11/14/2006 |
| 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 contents, and a sound system, which can reproduce a plurality of chan... | 09/19/2006 |
| 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 three-dimensional sound field effect to an input audio signal, thereby... | 07/25/2006 |
| 7035413 | Dynamic spectral matrix surround system A dynamically variable spectral matrix surround system decodes two-channel stereo into multi-channel surround. In one embodiment, the true stereo signal is present in left and right front and left and right surround channel outputs. When a dominant center channel si... | 04/25/2006 |
| 7016501 | Directional decoding The degree of correlation between two audio signals is determined and the channels are normalized according to first and second normalization modes responsive to correlation and uncorrelation respectively. ... | 03/21/2006 |
| 7013013 | Surround device There is provided a surround device which processes stereo signals decoded by a decoder of a multi-channel surround method comprises boost means which boosts middle and low frequency components of a center channel signal in the stereo signals. There is also provided... | 03/14/2006 |
| 7010131 | Quasi-differential power amplifier and method A quasi-differential power amplifier and method are disclosed that enhance drive capability and dynamic range by driving a right, left and common terminals with a right channel output signal, a left channel output signal, and a common mode output signal that are eac... | 03/07/2006 |
| 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 between the left and right speakers in front of the listener. A second... | 02/21/2006 |
| 6993141 | System for distributing a signal between loudspeaker drivers A system for distributing a source voltage from a signal source to a number of drivers or loudspeakers is disclosed. The system includes at least one autotransformer for connection to the signal source, and a number of drivers electrically connected to the autotrans... | 01/31/2006 |
| 6963944 | Method and device for the serial transmission of data A serial transmission of data takes place on a bus (10) which has at least one forward line (8) and one return line (9) and is connected to a plurality of slaves (S1, S2, . . . ) and via whose forward line (8) successive dat... | 11/08/2005 |
| 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 loudspeaker system or pair of loudspeaker systems located in front of the li... | 08/30/2005 |
| 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 processor is programmable to divide the input among at least 3 output... | 08/16/2005 |
| 6928169 | Audio signal processing Processing a single channel audio signal provides a plurality of audio channel signals by separating the single channel audio signal into a first separated signal, characterized by a spectral pattern generally characteristic of speech, and a second separated signal ... | 08/09/2005 |
