1
Jürgen Herre, Christof Faller: Apparatus and method for constructing a multi-channel output signal or for generating a downmix signal. Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung E V, Laurence A Greenberg, Werner H Stemer, Ralph E Locher, July 1, 2008: US07394903 (152 worldwide citation)

The apparatus for constructing a multi-channel output signal using an input signal and parametric side information, the input signal including the first input channel and the second input channel derived from an original multi-channel signal, and the parametric side information describing interrelat ...


2
Frank Baumgarte, Christof Faller: Coherence-based audio coding and synthesis. Agere Systems, Steve Mendelsohn, February 28, 2006: US07006636 (64 worldwide citation)

An auditory scene is synthesized from a mono audio signal by modifying, for each critical band, an auditory scene parameter (e.g., an inter-aural level difference (ILD) and/or an inter-aural time difference (ITD)) for each sub-band within the critical band, where the modification is based on an aver ...


3
Christof Faller: Perceptual synthesis of auditory scenes. Agere Systems, October 3, 2006: US07116787 (45 worldwide citation)

An auditory scene is synthesized by applying two or more different sets of one or more spatial parameters (e.g., an inter-ear level difference (ILD), inter-ear time difference (ITD), and/or head-related transfer function (HRTF)) to two or more different frequency bands of a combined audio signal, wh ...


4
Christof Faller: Perceptual audio coder bit allocation scheme providing improved perceptual quality consistency. Agere Systems, Kenneth M Brown, December 24, 2002: US06499010 (43 worldwide citation)

A method (and apparatus) for coding an audio signal, the method comprising the steps of partitioning the audio signal into a sequence of successive frames; calculating one or more noise thresholds for each of a plurality of frames in the sequence, each noise threshold for a particular one of the fra ...


5
Frank Baumgarte, Christof Faller: Late reverberation-based synthesis of auditory scenes. Agere Systems, Mendelsohn Drucker & Associates PC, Steve Mendelsohn, September 1, 2009: US07583805 (41 worldwide citation)

A scheme for stereo and multi-channel synthesis of inter-channel correlation (ICC) (normalized cross-correlation) cues for parametric stereo and multi-channel coding. The scheme synthesizes ICC cues such that they approximate those of the original. For that purpose, diffuse audio channels are genera ...


6
Eric Allamanche, Sascha Disch, Christof Faller, Juergen Herre: Individual channel shaping for BCC schemes and the like. Agere Systems, Fraunhofer Gesellschaft zur Forderung der angewandten Forschung e V, Mendelsohn Drucker & Associates P C, Steve Mendelsohn, May 18, 2010: US07720230 (28 worldwide citation)

At an audio encoder, cue codes are generated for one or more audio channels, wherein an envelope cue code is generated by characterizing a temporal envelope in an audio channel. At an audio decoder, E transmitted audio channel(s) are decoded to generate C playback audio channels, where C>E≧1. Receiv ...


7
Jürgen Herre, Christof Faller, Sascha Disch, Johannes Hilpert: Apparatus and method for generating a multi-channel output signal. Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung E V, Agere Systems, Laurence A Greenberg, Werner H Stemer, Ralph E Locher, June 24, 2008: US07391870 (27 worldwide citation)

An apparatus for generating a multi-channel output signal performs a center channel cancellation to obtain improved base channels for reconstructing left-side output channels or right-side output channels. In particular, the apparatus includes a cancellation channel calculator for calculating a canc ...


8
Christof Faller: Parametric coding of spatial audio with cues based on transmitted channels. Agere Systems, Mendelsohn Drucker & Associates P C, Steve Mendelsohn, August 31, 2010: US07787631 (24 worldwide citation)

A binaural cue coding scheme in which cue codes are derived from the transmitted audio signal. In one embodiment, an encoder downmixes C input channels to generate E transmitted channels, where C>E>1. A decoder derives cue codes from the transmitted channels and uses those cue codes to synthesize pl ...


9
Christof Faller: Synchronizing parametric coding of spatial audio with externally provided downmix. Agere Systems, Mendelsohn Drucker & Associates P C, Steve Mendelsohn, July 20, 2010: US07761304 (22 worldwide citation)

Embodiments of the present invention are directed to a binaural cue coding (BCC) scheme in which an externally provided audio signal (e.g., a studio engineering audio signal) is transmitted, along with derived cue codes, to a receiver instead of an automatically downmixed audio signal. The cue codes ...


10
Frank Baumgarte, Jiashu Chen, Christof Faller: Cue-based audio coding/decoding. Agere Systems, Mendelsohn Drucker & Associates P C, Steve Mendelsohn, January 5, 2010: US07644003 (22 worldwide citation)

Generic and specific C-to-E binaural cue coding (BCC) schemes are described, including those in which one or more of the input channels are transmitted as unmodified channels that are not downmixed at the BCC encoder and not upmixed at the BCC decoder. The specific BCC schemes described include 5-to ...