1
Elias Nemer
Juin Hwey Chen, Jes Thyssen, Elias Nemer, Bengt J Borgstrom, Ashutosh Pandey, Robert W Zopf: Speaker-identification-assisted uplink speech processing systems and methods. Broadcom Corporation, Fiala & Weaver P L L C, February 23, 2016: US09269368

Methods, systems, and apparatuses are described for performing speaker-identification-assisted speech processing in an uplink path of a communication device. In accordance with certain embodiments, a communication device includes speaker identification (SID) logic that is configured to identify the ...


2
Joseph Gerard Aguilar, David A Campana, Raymond Chen, Robert B Dunn, Robert J McAulay, Xiaoquin Sun, Wei Wang, Craig Watkins, Robert W Zopf: Scalable and embedded codec for speech and audio signals. Lucent Technologies, September 18, 2007: US07272556 (122 worldwide citation)

A system and method for processing of audio and speech signals is disclosed, which provide compatibility over a range of communication devices operating at different sampling frequencies and/or bit rates. The analyzer of the system divides the input signal in different portions, at least one of whic ...


3
Joseph Gerard Aguilar, Juin Hwey Chen, Wei Wang, Robert W Zopf: Parametric speech codec for representing synthetic speech in the presence of background noise. Lucent Technologies, August 15, 2006: US07092881 (12 worldwide citation)

A system and method are provided for processing audio and speech signals using a pitch and voicing dependent spectral estimation algorithm (voicing algorithm) to accurately represent voiced speech, unvoiced speech, and mixed speech in the presence of background noise, and background noise with a sin ...


4
Juin Hwey Chen, Robert W Zopf, Jes Thyssen: Packet loss concealment for sub-band predictive coding based on extrapolation of sub-band audio waveforms. Broadcom Corporation, Fiala & Weaver P L L C, August 16, 2011: US08000960 (11 worldwide citation)

A technique is described 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. In accordance with the technique, a first synthesized sub-band audio signal is synthesized, wherein synthesizing the first synthesized ...


5
Robert W Zopf, Jes Thyssen, Juin Hwey Chen: Packet loss concealment for sub-band predictive coding based on extrapolation of sub-band audio waveforms. Broadcom Corporation, Fiala & Weaver P L L C, December 13, 2011: US08078458 (10 worldwide citation)

A technique is described 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. In accordance with the technique, a first synthesized sub-band audio signal is synthesized, wherein synthesizing the first synthesized ...


6
Robert W Zopf, Juin Hwey Chen, Jes Thyssen: Time-warping of decoded audio signal after packet loss. Broadcom Corporation, Fiala & Weaver P L L C, September 20, 2011: US08024192 (8 worldwide citation)

A technique is described for use in a decoder configured to decode a series of frames representing an encoded audio signal. The technique is for transitioning between a lost frame and one or more received frames following the lost frame in the series of frames. In accordance with the technique, an o ...


7
Robert W Zopf, Juin Hwey Chen: Scaled window overlap add for mixed signals. Broadcom Corporation, Fiala & Weaver P L L C, May 20, 2014: US08731913 (7 worldwide citation)

A method for overlap-adding signals useful for performing frame loss concealment (FLC) in an audio decoder as well as in other applications. The method uses a dynamic mix of windows to overlap two signals whose normalized cross-correlation may vary from zero to one. If the overlapping signals are de ...


8
Juin Hwey Chen, Robert W Zopf: Audio time scale modification algorithm for dynamic playback speed control. Broadcom Corporation, Fiala & Weaver P L L C, December 13, 2011: US08078456 (6 worldwide citation)

A modified synchronized overlap add (SOLA) algorithm for performing high-quality, low-complexity audio time scale modification (TSM) is described. The algorithm produces good output audio quality with a very low complexity and without producing additional audible distortion during dynamic change of ...


9
Robert W Zopf, Juin Hwey Chen, Jes Thyssen: Classification-based frame loss concealment for audio signals. Broadcom Corporation, Fiala & Weaver P L L C, September 6, 2011: US08015000 (6 worldwide citation)

An audio decoding system performs frame loss concealment (FLC) when portions of a bit stream representing an audio signal are lost within the context of a digital communication system. The audio decoding system employs two different FLC methods: one designed to perform well for music, and the other ...


10
Robert W Zopf, Siukai Mak: Modem-assisted bit error concealment for audio communications systems. Broadcom Corporation, Fiala & Weaver P L L C, June 28, 2011: US07971108 (6 worldwide citation)

Systems and methods are described for managing bit errors present in a series of encoded bits representative of a portion of an audio signal, wherein the series of encoded bits is received over a communication link in an audio communications system. At least one characteristic of a portion of a rece ...