Patent
Error concealment for sub-band coded audio signals
Christophe Marc Macours
- 22 Nov 2011
15
TL;DR: In this paper, a decoder and method of decoding a sub-band coded digital audio signal is presented, which consists of an input, for receiving subband coefficients for a plurality of sub-bands of the audio signal; an error detection unit (20), adapted to analyze the content of a sequence of coefficients in one of the subbands, to derive for each coefficient an indication of whether the coefficient has been corrupted by an error of a predefined type.
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Abstract: A decoder and method of decoding a sub-band coded digital audio signal. The decoder comprises: an input, for receiving sub-band coefficients for a plurality of sub-bands of the audio signal; an error detection unit (20), adapted to analyze the content of a sequence of coefficients in one of the sub-bands, to derive for each coefficient an indication of whether the coefficient has been corrupted by an error of a predefined type; an error masking unit (30), adapted to generate from the sequence a modified sequence of coefficients for the sub-band, wherein errors of the predefined type are attenuated; a coefficient combination unit (40), adapted to combine the received coefficients and the modified coefficients, in dependence upon the indication of error; and a signal reconstruction unit (50), adapted to reconstruct the audio signal using the combined coefficients.
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Citations
Patent
Frame error concealment method and apparatus, and audio decoding method and apparatus
Ho-Sang Sung,Nam-Suk Lee +1 more
- 04 Mar 2016
TL;DR: In this article, a frame error concealment (FEC) method was proposed for decoding time domain signals generated after time-frequency inverse transform processing, where the current frame is an error frame or a normal frame when the previous frame is a error frame.
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- 18 Dec 2015
TL;DR: An apparatus for decoding an audio signal includes a receiving interface, wherein the receiving interface is configured to receive a first frame and a second frame as discussed by the authors, and the apparatus includes a noise level tracing unit for determining noise level information being represented in a tracing domain.
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Apparatus and method realizing a fading of an mdct spectrum to white noise prior to fdns application
Michael Schnabel,Markovic Goran,Ralph Sperschneider,Jeremie Lecomte,Christian Helmrich +4 more
- 23 Jun 2014
TL;DR: In this paper, an apparatus for decoding an encoded audio signal to obtain a reconstructed audio signal is provided, which comprises a receiving interface (1210) for receiving one or more frames comprising information on a plurality of audio signal samples of an audio signal spectrum of the encoded audio signals, and a processor (1220) for generating the reconstructed audio signals.
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Apparatus, method and corresponding computer program for generating an error concealment signal using power compensation
Michael Schnabel,Jérémie Lecomte,Ralph Sperschneider,Manuel Jander +3 more
- 28 Jul 2014
TL;DR: In this article, an LPC representation generator (100) and a gain calculator (600) were used to calculate a gain information from the LPC representations, and a compensator (406, 408, 900) was used to weight the codebook information or LPC synthesis output signal.
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Michael Schnabel,Jeremie Lecomte,Ralph Sperschneider,Manuel Jander +3 more
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TL;DR: In this paper, an LPC representation generator was used to generate a replacement LPC, and a noise estimator was used for estimating a noise estimate during a reception of good audio frames.
3
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Packet loss concealment for sub-band predictive coding based on extrapolation of sub-band audio waveforms
Juin-Hwey Chen,Jes Thyssen,Robert W. Zopf +2 more
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TL;DR: In this paper, a technique for concealing the effect of a lost frame in a series of frames representing an encoded audio signal in a sub-band predictive coding system is described.
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Error Concealment in relation to decoding of encoded acoustic signals
TL;DR: In this paper, the authors proposed a scheme for the concealment of errors in decoded acoustic signals caused by encoded data representing the acoustic signals being partially lost or damaged during transmission over a transmission medium.
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System and method for embedded audio coding with implicit auditory masking
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