Perceptual synthesis of auditory scenes

Inactive Publication Date: 2007-01-04
AGERE SYST INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the problems with such conventional stereo conferencing systems relates to transmission bandwidth, since the server has to transmit a left audio signal and a right audio signal to each conference participant.

Method used

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  • Perceptual synthesis of auditory scenes
  • Perceptual synthesis of auditory scenes
  • Perceptual synthesis of auditory scenes

Examples

Experimental program
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Embodiment Construction

[0030]FIG. 3 shows a block diagram of a conferencing system 300, according to one embodiment of the present invention. Conferencing system 300 comprises conference server 302, which supports conferencing between a plurality of conference participants, where each participant uses a different conference node 304. In preferred embodiments of the present invention, each node 304 is a personal computer (PC) equipped with a microphone 306 and headphones 308, although other hardware configurations are also possible. Since the present invention is directed to processing of the audio portion of conferences, the following description omits reference to the processing of the video portion of such conferences, which involves the generation, manipulation, and display of video signals by video cameras, video signal processors, and digital monitors that would be included in conferencing system 300, but are not explicitly represented in FIG. 3. The present invention can also be implemented for audi...

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Abstract

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, where each different frequency band is treated as if it corresponded to a single audio source in the auditory scene. In one embodiment, the combined audio signal corresponds to the combination of two or more different source signals, where each different frequency band corresponds to a region of the combined audio signal in which one of the source signals dominates the others. In this embodiment, the different sets of spatial parameters are applied to synthesize an auditory scene comprising the different source signals.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This is a continuation of co-pending application Ser. No. 09 / 848,877, filed on May 4, 2001 as attorney docket no. Faller 5, the teachings of which are incorporated herein by reference.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to the synthesis of auditory scenes, that is, the generation of audio signals to produce the perception that the audio signals are generated by one or more different audio sources located at different positions relative to the listener. [0004] 2. Description of the Related Art [0005] When a person hears an audio signal (i.e., sounds) generated by a particular audio source, the audio signal will typically arrive at the person's left and right ears at two different times and with two different audio (e.g., decibel) levels, where those different times and levels are functions of the differences in the paths through which the audio signal travels to reach the left...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04R5/00H04M3/56H04S3/00
CPCH04M3/56H04S2420/03H04S3/00H04M3/568
Inventor FALLER, CHRISTOF
Owner AGERE SYST INC
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