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
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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
Bit error concealment methods for speech coding
Juin-Hwey Chen
- 19 Aug 2002
TL;DR: In this article, a method of concealing bit errors in a signal is provided, which comprises encoding a signal parameter according to a set of constraints placed on a signal parameters quantizer.
42
Patent
System and method of noise reduction in receiving wireless transmission of packetized audio signals
Walter Etter,Katherine G. August,II Theodore Sizer +2 more
- 28 Jun 2002
TL;DR: In this article, a receiver for receiving wireless packetized audio signals having packet headers, and packet payloads including encoded audio signals is provided, which includes an audio decoder for decoding the encoded audio signal into digital audio signals, an audio error detector for detecting impulsive noise in the digital audio signal caused by corrupted payload packets, and a digital signal restoration unit for removing the impulsive noises from the digital signal.
30
Speech-adaptive predictive coding system having reflected binary encoder/decoder
TL;DR: In this paper, a speech predictive coding system produces a predicted residual sequence and parameter information representing predictor coefficients and residual power representing burst errors in the multiplexed signal are detected at the receiver using a burst-energy detector.
24
Patent
Speech restoration system and method for concealing packet losses
Ho-Sang Sung,Dae Hwan Hwang,Moon Keun Lee,Ki Seung Lee,Young Cheol Park,Dae-Hee Youn +5 more
- 07 Jul 2003
TL;DR: In this article, a speech restoration system and a method for concealing packet losses is presented. But the system is not suitable for the use of speech modality and does not have the ability to produce an excitation signal corresponding to a lost frame.
17
Patent
Error concealment for voice transmission system
Fisseha Mekuria,Jan Aberg +1 more
- 28 Feb 2002
TL;DR: In this article, a method for improving quality of voice information at the system receiver is proposed, which includes the steps of computing a threshold value associated with a particular pitch synchronous frame, and selectively comparing an average magnitude of the particular pitch synchronized frame with the threshold value to detect loss of a data frame contained in the particular PSC frame.
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