Patent
Bit error concealment for audio coding systems
Robert W. Zopf,Vivek Kumar,Juin-Hwey Chen +2 more
- 28 Apr 2009
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TL;DR: In this article, a bit error concealment (BEC) system and method is described that detects and conceals the presence of click-like artifacts in an audio signal caused by bit errors introduced during transmission of the audio signal within an audio communications system.
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Abstract: A bit error concealment (BEC) system and method is described herein that detects and conceals the presence of click-like artifacts in an audio signal caused by bit errors introduced during transmission of the audio signal within an audio communications system. A particular embodiment of the present invention utilizes a low-complexity design that introduces no added delay and that is particularly well-suited for applications such as Bluetooth® wireless audio devices which have low cost and low power dissipation requirements.
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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.
34
Patent
Simultaneous time-domain and frequency-domain noise shaping for tdac transforms
Bessette Bruno
- 15 Oct 2010
TL;DR: In this paper, a frequency-domain noise shaping method and a device interpolates a spectral shape and a time-domain envelope of a quantization noise in a windowed and transform-coded audio signal.
18
Patent
Communication terminal and communication method
Shuji Miyasaka,Kosuke Nishio,Ichiro Kawashima +2 more
- 21 Aug 2012
TL;DR: In this article, an encoder codes the audio signal for transmission to generate an output bitstream and transmits the generated output bit stream to another communication terminal; and a control unit controls, for the respective subbands, echo cancellation processing according to a reproduction band of at least one of the output audio signal and the audio signals for transmission.
12
Patent
Modem-assisted bit error concealment for audio communications systems
Robert W. Zopf,Siukai Mak +1 more
- 21 Jul 2009
TL;DR: In this article, a number of bit errors present in the series of encoded bits is estimated based on the at least one characteristic of a portion of a received modulated carrier signal, and one of a plurality of methods for producing a series of digital audio samples representative of the portion of the audio signal is selectively performed.
8
Patent
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.
5
References
Patent
Low-complexity frame erasure concealment
Juin-Hwey Chen
- 27 Jun 2008
TL;DR: In this article, a system is described that performs frame erasure concealment to generate frames of an output speech signal corresponding to a series of erased frames of encoded bit-stream in a manner that conceals the quality-degrading effects of such erased frames.
10
Patent
Device for improving voice signal in quality
Masato Tanaka,Meizhong Wang,Kazuhiko Seki +2 more
- 19 Dec 2000
TL;DR: In this article, the authors proposed a click noise detector and click noise suppressing circuit for improving voice signal quality by discriminating a radio environment of a signal transmission path and detecting click noise.
7
Patent
Audio transmission system having a pitch period estimator for bad frame handling
Rakesh Taori
- 13 Aug 2001
TL;DR: In this paper, the pitch period estimator is coupled with the decoder audio output for estimating the pitch periods of the audio representation and a bad frame processing means for replacing the audio output during a detected bad frame by a pitch period determined representation of said audio output.
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