1
Shen Michael T: Single stage power amplifiers for multiple signal channels. Plevy Arthur L, December 3, 1974: US3852530 (145 worldwide citation)

There is disclosed apparatus for amplifying, for example, four separate stereo or audio information channels by means of a common power amplifier. Each audio channel is modulated on a respective carrier signal and then applied to a common amplifier which is of a wide-band circuit configuration.Certa ...


2
Hafler David: Two-channel, four-component stereophonic system. Dynaco, October 10, 1972: US3697692 (132 worldwide citation)

A two-channel stereo signal including left and right channel responses (L and R, respectively), deriving from only two amplifiers, is fed to four speakers located approximately at the corners of a quadriliateral area, and are positioned to face toward the interior of the area. The network drives the ...


3
Harold Herman Trebes Jr: System and method for providing peer-oriented control of telecommunications services. R Steven Coursey, Troutman Sanders, November 13, 2001: US06317438 (130 worldwide citation)

In a telecommunications network environment including non-participating elements and participating elements, a method for providing a telecommunications service between a first peer element connected to the telecommunications network environment and a second peer element connected to the telecommuni ...


4
Paul Gothard Knutson, Billy Wesley Beyers Jr, Kumar Ramaswamy, Thomas Anthony Stahl: Auxiliary data insertion in a transport datastream. Thomson Licensing, Joseph S Tripolis, Joseph J Laks, Ronald H Kurdyis, September 7, 2004: US06788710 (123 worldwide citation)

A digital device, such as a digital VTR, receives and records an MPEG compatible datastream. On play back, the DVTR inserts packetized auxiliary information, such as on-screen display information, into the transport datastream for transmission to another digital device, such as a television receiver ...


5
Jens Spille: Method for generating a multi-channel audio decoder matrix. Deutsche Thomson Brandt, Joseph S Tripoli, Eric P Herrmann, Ronald H Kurdyla, June 4, 1996: US05524054 (116 worldwide citation)

In an MPEG multi-channel audio signal processor, a decoder requires a respective decoder matrix for determining different output channels from coded audio data. Some transmitted information indicates basic parameters of the multi-channel system. This information may be used to address a currently re ...


6
Schuijers Erik G P, Oomen Arnoldus W J: Audio coding. Koninklijke Philips Electronics, Schuijers Erik G P, Oomen Arnoldus W J, GROENENDAAL Antonius W M, January 22, 2004: WO/2004/008806 (114 worldwide citation)

In binaural stereo coding, only one monaural channel is encoded. An additional layer holds the parameters to retrieve the left and right signal. An encoder is disclosed which links transient information extracted from the mono encoded signal to parametric multi-channel layers to provide increased pe ...


7
Juergen Heinrich Herre: Enhanced joint stereo coding method using temporal envelope shaping. Lucent Technologies, Kenneth M Brown, September 22, 1998: US05812971 (112 worldwide citation)

A method and apparatus for performing joint stereo coding of multi-channel audio signals using intensity stereo coding techniques. In particular, predictive filtering techniques are applied to the spectral coefficient data, thereby preserving the time structure of the output signal of each channel, ...


8
Shigenobu Minami: Stereophonic voice signal transmission system. Kabushiki Kaisha Toshiba, Finnegan Henderson Farabow Garrett & Dunner, March 21, 1989: US04815132 (111 worldwide citation)

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 plurality of voice signals of a plurality of channels and additional data required for reproducing the v ...


9
Peter H Myers: Three-dimensional auditory display apparatus and method utilizing enhanced bionic emulation of human binaural sound localization. American Natural Sound Company, Philip M Shaw Jr, March 28, 1989: US04817149 (109 worldwide citation)

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 are a front to back cue in the form of attenuation and boosting of certain frequency components of the ...


10
Baumgarte Frank, Kroon Petter: Hybrid multi-channel/cue coding/decoding of audio signals. Agere Systems, January 2, 2004: EP1376538-A1 (107 worldwide citation)

Part of the spectrum of two or more input signals is encoded using conventional coding techniques, while encoding the rest of the spectrum using binaural cue coding (BCC). In BCC coding, spectral components of the input signals are downmixed and BCC parameters (e.g., inter-channel level and/or time ...



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