Patents by Inventor Jes Thyssen

Jes Thyssen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7617096
    Abstract: A quantizer for quantization of a vector comprises a codevector generator that generates a set of candidate codevectors and a memory for storing an illegal space definition representing illegal vectors. The quantizer also includes a legal status tester that determines legal candidate codevectors among the set of candidate codevectors using the illegal space definition, and a codevector selector that determines a best legal candidate codevector among the one or more legal candidate codevectors. The vector includes parameters relating to a speech and/or audio signal, such as Line Spectral Frequencies (LSFs).
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: November 10, 2009
    Assignee: Broadcom Corporation
    Inventor: Jes Thyssen
  • Patent number: 7610198
    Abstract: A method of searching a signed codebook to quantize a vector includes weighting a shape codevector in a set of shape codevectors with a weighting function for a Weighted Mean Square Error (WMSE) criteria, to produce a weighted shape codevector. The method further includes correlating the weighted shape codevector with the vector to produce a weighted correlation term. The method also includes determining, based on a sign of the weighted correlation term, a preferred one of a positive and a negative signed codevector associated with the shape codevector. The method further includes determining whether one of the signed codevectors does not belong to an illegal space defining illegal vectors.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: October 27, 2009
    Assignee: Broadcom Corporation
    Inventor: Jes Thyssen
  • Publication number: 20090248405
    Abstract: Systems and methods are described for performing packet loss concealment using an extrapolation of an excitation waveform in a sub-band predictive speech coder, such as an ITU-T Recommendation G.722 wideband speech coder. The systems and methods are useful for concealing the quality-degrading effects of packet loss in a sub-band predictive coder and address some sub-band architectural issues when applying excitation extrapolation techniques to such sub-band predictive coders.
    Type: Application
    Filed: May 29, 2009
    Publication date: October 1, 2009
    Applicant: Broadcom Corporation
    Inventors: Juin-Hwey Chen, Jes Thyssen, Robert W. Zopf
  • Publication number: 20090240492
    Abstract: 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 sub-band audio signal comprises performing waveform extrapolation based on a stored first sub-band decoded audio signal. A second synthesized sub-band audio signal is also synthesized, wherein synthesizing the second synthesized sub-band audio signal comprises performing waveform extrapolation based on the stored second sub-band decoded audio signal. The first synthesized sub-band audio signal and the second synthesized sub-band audio signal are combined to generate a synthesized full-band output audio signal corresponding to a lost frame.
    Type: Application
    Filed: May 29, 2009
    Publication date: September 24, 2009
    Applicant: BROADCOM CORPORATION
    Inventors: Robert W. Zopf, Jes Thyssen, Juin-Hwey Chen
  • Patent number: 7593852
    Abstract: The invention improves the encoding and decoding of speech by focusing the encoding on the perceptually important characteristics of speech. The system analyzes selected features of an input speech signal, and first performing a common frame based speech coding of an input speech signal. The system then performs a speech coding based on either a first speech coding mode or a second speech coding mode. The selection of a mode is based on characteristics of the input speech signal. The first speech coding mode uses a first framing structure and the second speech coding mode uses a second framing structure.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: September 22, 2009
    Assignee: Mindspeed Technologies, Inc.
    Inventors: Yang Gao, Adil Benyassinc, Jes Thyssen, Eyal Shlomot, Huan-yu Su
  • Publication number: 20090232228
    Abstract: A technique is described herein for reducing audible artifacts in an audio output signal generated by decoding a received frame in a series of frames representing an encoded audio signal in a predictive coding system. In accordance with the technique, it is determined if the received frame is one of a predefined number of received frames that follow a lost frame in the series of the frames. Responsive to determining that the received frame is one of the predefined number of received frames, at least one parameter or signal associated with the decoding of the received frame is altered from a state associated with normal decoding. The received frame is then decoded in accordance with the at least one parameter or signal to generate a decoded audio signal. The audio output signal is then generated based on the decoded audio signal.
    Type: Application
    Filed: May 29, 2009
    Publication date: September 17, 2009
    Applicant: BROADCOM CORPORATION
    Inventor: Jes Thyssen
  • Patent number: 7512535
    Abstract: A filter controller processes a decoded speech (DS) signal. The DS signal has a spectral envelope including a first plurality of formant peaks having different respective amplitudes. The controller produces, from the DS signal, a spectrally-flattened DS signal that is a time-domain signal. The spectrally-flattened time-domain DS signal has a spectral envelope including a second plurality of formant peaks. Each of the second plurality of formant peaks approximately coincides in frequency with a respective one of the first plurality of formant peaks. Also, the second plurality of formant peaks have approximately equal respective amplitudes. Next, the controller derives, from the spectrally-flattened time-domain DS signal, a set of filter coefficients representative of a filter response that is to be used to filter the DS signal.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: March 31, 2009
    Assignee: Broadcom Corporation
    Inventors: Juin-Hwey Chen, Jes Thyssen
  • Publication number: 20090043574
    Abstract: There is provided a method of decoding speech data generated from a speech signal. The method comprises receiving the speech data having at least one main pulse in a subframe of the speech data; generating a first predicted pulse, based on the at least one main pulse, on one side of the main pulse in the subframe of the speech data, wherein the first predicted pulse has a lower gain than the main pulse; generating a second predicted pulse, as a mirror image of the first predicted pulse on a reverse time scale, on the other side of the main pulse in the subframe of the speech data; reconstructing the speech signal using the at least one main pulse, the first predicted pulse and the second predicted pulse.
    Type: Application
    Filed: September 23, 2008
    Publication date: February 12, 2009
    Applicants: Mindspeed Technologies, Inc.
    Inventors: Yang Gao, Adil Benyassine, Jes Thyssen, Eyal Shlomot, Huan-yu Su
  • Patent number: 7478040
    Abstract: A method for adaptive long-term filtering of an audio signal, such as a decoded speech signal. The method includes measuring a smoothed periodicity of an audio signal segment, such as an audio frame, wherein the smoothed periodicity is measured by low-pass filtering an instantaneous periodicity of the audio signal segment. The periodicity of the audio signal segment is then increased in a manner that depends upon whether the smoothed periodicity is less than a predetermined threshold. By utilizing a smoothed periodicity measurement in this fashion, more accurate control of the post-filter is provided as compared to conventional solutions. Additionally, the method includes deriving filters by interpolating between filter responses of adjacent audio signal segments to minimize distortion at segment boundaries.
    Type: Grant
    Filed: October 20, 2004
    Date of Patent: January 13, 2009
    Assignee: Broadcom Corporation
    Inventors: Jes Thyssen, Juin-Hwey Chen
  • Publication number: 20080189116
    Abstract: Certain aspects of a method and system for a dual mode subband acoustic echo canceller with integrated noise suppression may include splitting an input signal into a lowband component and a highband component. The subbands of each of the lowband component and the highband component may be processed in order to reduce an echo associated with the input signal and to suppress the noise associated with the input signal.
    Type: Application
    Filed: February 7, 2007
    Publication date: August 7, 2008
    Inventors: Wilfrid LeBlanc, Jes Thyssen
  • Patent number: 7353168
    Abstract: A method to eliminate discontinuities in an adaptively filtered signal includes filtering a beginning portion of a current signal frame using a past set of filter coefficients, thereby producing a first filtered frame portion. The method also includes filtering the beginning portion of the current signal frame using a current set of filter coefficients, thereby producing a second filtered frame portion. The method also includes modifying the second filtered frame portion with the first filtered frame portion so as to smooth a possible filtered signal discontinuity between the second filtered frame portion and a past filtered frame produced using the past filter coefficients.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: April 1, 2008
    Assignee: Broadcom Corporation
    Inventors: Jes Thyssen, Chris C Lee, Juin-Hwey Chen
  • Publication number: 20080075244
    Abstract: A stream of voicemail audio data is received. A text-based representation of a portion of the stream of voicemail audio data is generated. One or more identification tags from the stream of voicemail audio data and/or the text-based representation of the portion of the stream of voicemail audio data are obtained from a first user. The text-based representation of the portion of the stream of voicemail audio data and the one or more identification tags are provided to a second user through a graphical user interface.
    Type: Application
    Filed: August 31, 2006
    Publication date: March 27, 2008
    Inventors: Kelly Hale, Jes Thyssen
  • Publication number: 20080046237
    Abstract: A technique is described herein for updating a state of a decoder configured to decode a series of frames representing an encoded audio signal. In accordance with the technique, an output audio signal associated with a lost frame in the series of frames is synthesized. The decoder state is set to align with the synthesized output audio signal at a frame boundary. An extrapolated signal is generated based on the synthesized output audio signal. A time lag is calculated between the extrapolated signal and a decoded audio signal associated with a first received frame after the lost frame in the series of frames, wherein the time lag represents a phase difference between the extrapolated signal and the decoded audio signal. The decoder state is then reset based on the time lag.
    Type: Application
    Filed: August 15, 2007
    Publication date: February 21, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: Robert W. Zopf, Jes Thyssen, Juin-Hwey Chen
  • Publication number: 20080046248
    Abstract: 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 sub-band audio signal comprises performing waveform extrapolation based on a stored first sub-band decoded audio signal. A second synthesized sub-band audio signal is also synthesized, wherein synthesizing the second synthesized sub-band audio signal comprises performing waveform extrapolation based on the stored second sub-band decoded audio signal. The first synthesized sub-band audio signal and the second synthesized sub-band audio signal are combined to generate a synthesized full-band output audio signal corresponding to a lost frame.
    Type: Application
    Filed: August 15, 2007
    Publication date: February 21, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: Juin-Hwey Chen, Robert W. Zopf, Jes Thyssen
  • Publication number: 20080046249
    Abstract: A technique is described herein for updating a state of a decoder in a predictive coding system after synthesizing an audio output signal corresponding to a lost frame in a series of frames representing an encoded audio signal. In accordance with the technique, an audio signal associated with the synthesized output audio signal is re-encoded in an encoder to generate an encoder state, wherein the encoder is simplified with respect to an encoder used to generate the encoded audio signal. The state of the decoder is then updated based on the generated encoder state.
    Type: Application
    Filed: August 15, 2007
    Publication date: February 21, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: Jes Thyssen, Robert W. Zopf, Juin-Hwey Chen
  • Publication number: 20080046236
    Abstract: A technique is described herein for reducing audible artifacts in an audio output signal generated by decoding a received frame in a series of frames representing an encoded audio signal in a predictive coding system. In accordance with the technique, it is determined if the received frame is one of a predefined number of received frames that follow a lost frame in the series of the frames. Responsive to determining that the received frame is one of the predefined number of received frames, at least one parameter or signal associated with the decoding of the received frame is altered from a state associated with normal decoding. The received frame is then decoded in accordance with the at least one parameter or signal to generate a decoded audio signal. The audio output signal is then generated based on the decoded audio signal.
    Type: Application
    Filed: August 15, 2007
    Publication date: February 21, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: Jes Thyssen, Juin-Hwey Chen, Robert W. Zopf
  • Publication number: 20080046233
    Abstract: 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 provided. In accordance with the technique, one or more received frames in the series of frames are decoded to generate a full-band output audio signal, wherein the full-band output audio signal comprises a combination of at least a first sub-band decoded audio signal and a second sub-band decoded audio signal. The full-band output audio signal corresponding to the one or more received frames is stored. Then, a full-band output audio signal corresponding to the lost frame is synthesized, wherein synthesizing the full-band output audio signal corresponding to the lost frame comprises performing waveform extrapolation based on the stored full-band output audio signal corresponding to the one or more received frames.
    Type: Application
    Filed: August 15, 2007
    Publication date: February 21, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: Juin-Hwey Chen, Jes Thyssen, Robert W. Zopf
  • Publication number: 20080046252
    Abstract: 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 output audio signal associated with the lost frame is synthesized. An extrapolated signal is generated based on the synthesized output audio signal. A time lag is calculated between the extrapolated signal and a decoded audio signal associated with the received frame(s), wherein the time lag represents a phase difference between the extrapolated signal and the decoded audio signal. The decoded audio signal is time-warped based on the time lag, wherein time-warping the decoded audio signal comprises stretching or shrinking the decoded audio signal in the time domain.
    Type: Application
    Filed: August 15, 2007
    Publication date: February 21, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: Robert W. Zopf, Juin-Hwey Chen, Jes Thyssen
  • Publication number: 20080040122
    Abstract: Systems and methods are described for performing packet loss concealment using an extrapolation of an excitation waveform in a sub-band predictive speech coder, such as an ITU-T Recommendation G.722 wideband speech coder. The systems and methods are useful for concealing the quality-degrading effects of packet loss in a sub-band predictive coder and address some sub-band architectural issues when applying excitation extrapolation techniques to such sub-band predictive coders.
    Type: Application
    Filed: August 8, 2007
    Publication date: February 14, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: Juin-Hwey Chen, Jes Thyssen, Robert W. Zopf
  • Publication number: 20080033718
    Abstract: 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 designed to perform well for speech. When a frame is deemed lost, the audio decoding system analyzes a previously-decoded audio signal corresponding to previously-decoded frames of an audio bit-stream. Based on the results of the analysis, the lost frame is classified as either speech or music. Using this classification, other signal analysis, and knowledge of the employed FLC methods, the audio decoding system selects the appropriate FLC method which then performs FLC on the lost frame.
    Type: Application
    Filed: April 13, 2007
    Publication date: February 7, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: Robert W. Zopf, Juin-Hwey Chen, Jes Thyssen