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Noise Generation in Audio Codecs

An audio encoder and coding technology, applied in the field of audio codec, to achieve the effect of good separation, saving bit rate, and maintaining the quality of noise generation

Active Publication Date: 2016-06-01
FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Synthesized noise, on the other hand, must closely mimic real noise such that the synthesis is transparent to the user

Method used

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  • Noise Generation in Audio Codecs
  • Noise Generation in Audio Codecs
  • Noise Generation in Audio Codecs

Examples

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other Embodiment approach

[0136] Other embodiments comprise the computer program for performing one of the methods described herein, stored on a machine readable carrier.

[0137] In other words, the method embodiments of the invention are thus a computer program with program code for carrying out one of the methods described herein when the computer program is run on a computer.

[0138] A further embodiment of the inventive methods is therefore a data carrier (or a digital storage medium or a computer readable medium) comprising, recorded thereon, the computer program for performing one of the methods described herein. A data carrier, digital storage medium or recording medium is generally tangible and / or non-transitory.

[0139] A further embodiment of the methods of the invention is therefore a data stream or a sequence of signals representing a computer program for performing one of the methods described herein. A data stream or signal sequence can eg be configured for transmission via a data com...

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Abstract

The spectral domain is effectively used to parameterize the background noise, thereby obtaining a background noise synthesis that is more realistic and thus results in a more transparent active to inactive phase switching.

Description

technical field [0001] The present invention relates to audio codecs supporting noise synthesis during inactive phases. Background technique [0002] The possibility to take advantage of inactive periods of speech or other noise sources to reduce the transmission bandwidth is known in the art. Such schemes typically use some form of detection to distinguish inactive (or silent) phases from active (or non-silent) phases. During the inactive phase, the lower bit rate is achieved by discontinuing the transmission of the normal data stream that precisely encodes the recording signal and only sending Silent Insertion Description (SID) updates. SID updates may be transmitted at regular intervals, or when changes in background noise characteristics are detected. The SID frame can then be used on the decoding side to generate background noise with characteristics similar to the background noise during the active phase, so that the suspension of the transmission of the normal data ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/012
CPCG10L19/0212G10L19/18G10L19/012G10L19/04G10K15/02G10L19/00G10L19/005G10L19/025G10L19/028G10L19/08G10K11/16G10L19/02G10L19/03G10L19/07G10L19/10G10L19/107G10L19/12G10L19/13G10L19/22G10L21/0216G10L25/06G10L25/78G10L19/022G10L19/26
Inventor 潘基·塞蒂亚万斯特凡·维尔德安东尼·隆巴尔多马丁·迪茨
Owner FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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