Patents by Inventor Huan Yu

Huan Yu 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: 6721712
    Abstract: In an exemplary conversion scheme, a frame of a first speech signal comprising a plurality of frames encoded at a plurality of first rates, including a first non-speech rate, is received. The rate of the received frame is determined, and if the received frame is encoded at the first non-speech rate, then the received frame is re-encoded at either a second or third non-speech rate to generate a frame of a second speech signal. Moreover, a system for converting a speech signal comprises a receiver for receiving a frame of a first speech signal and a processor capable of determining the encoding rate of the received frame and re-encoding the received frame at either a second or third non-speech rate if the received frame was originally encoded at a first non-speech rate.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: April 13, 2004
    Assignee: Mindspeed Technologies, Inc.
    Inventors: Adil Benyassine, Eyal Shlomot, Huan-Yu Su
  • Patent number: 6716140
    Abstract: A display for an exercise device has a cylindrical housing formed from a rear half shell and a front half shell. The housing has an inner space and two open ends, and a support rod of the body-build can pass through the inner space and extend out from the open ends. A positioning hole is defined in the support rod, and a positioning stub corresponding to the positioning hole is formed in the inner space of the housing. The positioning stub is mounted in the positioning hole to prevent the housing from rotating on the support rod. Two fasteners are securely and respectively formed on the housing in the inner space fasten the rear and front half shell together to form the housing.
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: April 6, 2004
    Inventor: Huan-Yu Cheng
  • Publication number: 20040048719
    Abstract: A display for an exercise device has a cylindrical housing formed from a rear half shell and a front half shell. The housing has an inner space and two open ends, and a support rod of the body-build can pass through the inner space and extend out from the open ends. A positioning hole is defined in the support rod, and a positioning stub corresponding to the positioning hole is formed in the inner space of the housing. The positioning stub is mounted in the positioning hole to prevent the housing from rotating on the support rod. Two fasteners are securely and respectively formed on the housing in the inner space fasten the rear and front half shell together to form the housing.
    Type: Application
    Filed: September 5, 2002
    Publication date: March 11, 2004
    Inventor: Huan-Yu Cheng
  • Patent number: 6697776
    Abstract: A digitized signal detection system where the bit rate encoding is changed dynamically to provide encoding for different type signals and formats at bit rates optimized to properly reconstruct the input signal whether speech or non-speech and therefore can transfer signals of different character on a frame by frame basis. A change of encoding format can make the system a speech or music recognizer dependent what is to be listened for. Three basic components a recognizer which categorizes the type of input signal, an evaluator which evaluates the category of quality of the reconstructed signal and a recommender which make as recommendation based on the quality to change standards to encode the signals received pursuant to a standard which provides for improved quality. The dynamic signal detector receives the input signal directly and extracts the parameters for evaluation. These parameters are tested and a determination made if a switch of standards are required. To improve the reconstructed signal.
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: February 24, 2004
    Assignee: Mindspeed Technologies, Inc.
    Inventors: Gilles G. Fayad, Huan-Yu Su
  • Patent number: 6694293
    Abstract: The invention provides a speech coding system with a music classifier. An encoder is disposed to receive an input signal and provides a bitstream based upon a speech coding of a portion of the input signal. The encoder provides a classification of the input signal as one of noise, speech, and music. The music classifier analyzes or determines signal properties of the input signal. The music classifier compares the signal properties to thresholds to determine the classification of the input signal.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: February 17, 2004
    Assignee: Mindspeed Technologies, Inc.
    Inventors: Adil Benyassine, Huan-Yu Su
  • Patent number: 6691089
    Abstract: A text-prompted speaker verification system that can be configured by users based on a desired level of security. A user is prompted for a multiple-digit (or multiple-word) password. The number of digits or words used for each password is defined by the system in accordance with a user set preferred level of security. The level of training required by the system is defined by the user in accordance with a preferred level of security. The set of words used to generate passwords can also be user configurable based upon the desired level of security. The level of security associated with the frequency of false accept errors verses false reject errors is user configurable for each particular application.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: February 10, 2004
    Assignee: Mindspeed Technologies Inc.
    Inventors: Huan-yu Su, Khaled Assaleh
  • Publication number: 20030200092
    Abstract: A speech compression system capable of encoding a speech signal into a bitstream for subsequent decoding to generate synthesized speech is disclosed. The speech compression system optimizes the bandwidth consumed by the bitstream by balancing the desired average bit rate with the perceptual quality of the reconstructed speech. The speech compression system comprises a full-rate codec, a half-rate codec, a quarter-rate codec and an eighth-rate codec. The codecs are selectively activated based on a rate selection. In addition, the full and half-rate codecs are selectively activated based on a type classification. Each codec is selectively activated to encode and decode the speech signals at different bit rates emphasizing different aspects of the speech signal to enhance overall quality of the synthesized speech.
    Type: Application
    Filed: April 8, 2003
    Publication date: October 23, 2003
    Inventors: Yang Gao, Adil Benyassine, Jes Thyssen, Eyal Shlomot, Huan-Yu Su
  • Patent number: 6636829
    Abstract: An exemplary decoder comprises a receiver that receives parameters of a speech signal on a frame-by-frame basis, a control logic for decoding parameters and for resynthesizing the speech signal, the control logic including a minimum spacing indicative of a minimum difference required between LSFs of consecutive frames, a frame recovery logic that, when a lost frame detector detects a lost frame, sets the minimum spacing for the lost frame to a first value which is greater than the minimum spacing for the previously received frame, and/or uses pitch lag parameters of a plurality of previously received frames to extrapolate a pitch lag parameter for the lost frame, and/or sets gain parameter of a subframe of the lost frame in a first manner if the lost gain parameter is an adaptive codebook gain parameter and in a second manner if the lost gain parameter is a fixed codebook gain parameter.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: October 21, 2003
    Assignee: Mindspeed Technologies, Inc.
    Inventors: Adil Benyassine, Eyal Shlomot, Huan-Yu Su
  • Patent number: 6618700
    Abstract: In a cellular telephone system where a digital cellular telephone is connected to a regular telephone through the public switched telephone network (PSTN), a speech encoder/decoder is used with an A/&mgr;-Law encoder/decoder causing annoying audible noise at very low levels because of the quantization characteristics of the A/&mgr;-Law encoder/decoder. This noise is eliminated by adding a digital constant to the output of the speech coder, shifting the low level signal away from zero. The resulting DC level added to the speech signal is inaudible to the PSTN telephone user and does not degrade speech quality. Alternatively, the constant added to the output of the speech coder is confined to a small value added to the speech coder output to move the entire speech coder output during the silence period, between speech periods, above zero or below zero.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: September 9, 2003
    Assignee: Mindspeed Technologies, Inc.
    Inventors: Jes Thyssen, Huan-Yu Su
  • Patent number: 6606591
    Abstract: A speech coding system that employs hybrid linear prediction coding during extraction of linear prediction coefficients within ITU-Recommendation speech coding standards. The present invention is operable within linear prediction speech coding systems including code-excited linear prediction speech coding systems, and it provides for a substantially improved perceptual quality of reproduced speech signals when compared to conventional speech coding methods that employ the commonly known auto-correlation method that is based on minimizing the linear prediction coding (LPC) prediction error energy. The invention is operable to provide for high perceptual quality of reproduced speech signals having substantial differences of energy in various frequency bands.
    Type: Grant
    Filed: April 13, 2000
    Date of Patent: August 12, 2003
    Assignee: Conexant Systems, Inc.
    Inventor: Huan-yu Su
  • Patent number: 6604070
    Abstract: A speech compression system capable of encoding a speech signal into a bitstream for subsequent decoding to generate synthesized speech is disclosed. The speech compression system optimizes the bandwidth consumed by the bitstream by balancing the desired average bit rate with the perceptual quality of the reconstructed speech. The speech compression system comprises a full-rate codec, a half-rate codec, a quarter-rate codec and an eighth-rate codec. The codecs are selectively activated based on a rate selection. In addition, the full and half-rate codecs are selectively activated based on a type classification. Each codec is selectively activated to encode and decode the speech signals at different bit rates emphasizing different aspects of the speech signal to enhance overall quality of the synthesized speech.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: August 5, 2003
    Assignee: Conexant Systems, Inc.
    Inventors: Yang Gao, Adil Benyassine, Jes Thyssen, Eyal Shlomot, Huan-yu Su
  • Patent number: 6581032
    Abstract: A speech compression system capable of encoding a speech signal into a bitstream for subsequent decoding to generate synthesized speech is disclosed. The speech compression system optimizes the bandwidth consumed by the bitstream by balancing the desired average bit rate with the perceptual quality of the reconstructed speech. The speech compression system comprises a full-rate codec, a half-rate codec, a quarter-rate codec and an eighth-rate codec. The codecs are selectively activated based on a rate selection. In addition, the full and half-rate codecs are selectively activated based on a type classification. Each codec is selectively activated to encode and decode the speech signals at different bit rates emphasizing different aspects of the speech signal to enhance overall quality of the synthesized speech.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: June 17, 2003
    Assignee: Conexant Systems, Inc.
    Inventors: Yang Gao, Adil Benyassine, Jes Thyssen, Eyal Shlomot, Huan-yu Su
  • Patent number: 6581030
    Abstract: A speech coding system that employs target signal reference shifting in code-excited linear prediction speech coding. The speech coding system performs modification of a target signal that is used to perform speech coding of a speech signal. The modified target signal that is generated from a preliminary target signal is then used to calculate an adaptive codebook gain that is used to perform speech coding of the speech signal. The speech coding performed in accordance with the present invention provides for a substantially reduced bit-rate of operation when compared to conventional speech coding methods that inherently require a significant amount of bandwidth to encode a fractional pitch lag delay during pitch prediction that is performed within conventional code-excited linear prediction speech coding systems.
    Type: Grant
    Filed: April 13, 2000
    Date of Patent: June 17, 2003
    Assignee: Conexant Systems, Inc.
    Inventor: Huan-yu Su
  • Patent number: 6574593
    Abstract: A speech compression system capable of encoding a speech signal into a bitstream for subsequent decoding to generate synthesized speech is disclosed. The speech compression system optimizes the bandwidth consumed by the bitstream by balancing the desired average bit rate with the perceptual quality of the reconstructed speech. The speech compression system comprises a full-rate codec, a half-rate codec, a quarter-rate codec and an eighth-rate codec. The codecs are selectively activated based on a rate selection. In addition, the full and half-rate codecs are selectively activated based on a type classification. Each codec is selectively activated to encode and decode the speech signals at different bit rates emphasizing different aspects of the speech signal to enhance overall quality of the synthesized speech.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: June 3, 2003
    Assignee: Conexant Systems, Inc.
    Inventors: Yang Gao, Adil Benyassine, Huan-yu Su, Eyal Shlomot, Jes Thyssen
  • Patent number: 6523002
    Abstract: A zero delay continuous long term (LT) pre-processing method operable in a speech codec that introduces no delay. The present invention provides an elegant solution to perform long term (LT) pre-processing of the pitch lag of a speech signal to save a large number of bits required in various speech coding methods, including the code-excited linear prediction method. The present invention is ideal for speech coding standards and methods that any undesirable delay at the end of a speech frame of the speech signal. The present invention overcomes a significant limitation in the art of speech coding, in that, a speech coding system that performs the invention is operable while providing real time operation and introducing no delay whatsoever.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: February 18, 2003
    Assignee: Conexant Systems, Inc.
    Inventors: Yang Gao, Huan-yu Su
  • Patent number: 6510409
    Abstract: A fully backward compatible intelligent discontinued transmission (DTX) and comfort noise generation (CNG) scheme that is operable in pulse code modulation (PCM) speech coding systems. The scheme, for example, provides a speech encoder comprising a speech signal analysis circuitry configured to calculates a predetermined plurality of parameters from the speech signal, a voice activity detector configured to determine voice activity in the speech signal, where the speech encoder enters a discontinued transmission mode of the voice activity detector does not detect voice activity, and a transmitter configured to transmit one or more speech samples of the speech signal after the speech encoder enters the discontinued transmission mode, where the one or more speech samples are capable of use by a remote speech decoder to extract a parameter from the one or more speech samples in order generate a background noise base on the parameter.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: January 21, 2003
    Assignee: Conexant Systems, Inc.
    Inventor: Huan-Yu Su
  • Patent number: 6493665
    Abstract: A multi-rate speech coded supports a plurality of encoding bit rate modes by adaptively selecting encoding bit rate modes to match communication channel restrictions. In higher bit rate encoding modes, an accurate representation of speech through CELP (code excited linear prediction) and other associated modeling parameters are generated for higher quality decoding and reproduction. To support lower bit rate encoding modes, a variety of techniques are applied many of which involve the classification of the input signal. For each bit rate mode selected, pluralities of fixed or innovation subcodebooks are selected for use in generating innovation vectors. The fixed codebook contains pulse subcodebooks and noise-like subcodebooks. To assist in selection of one of the subcodebooks, an adaptive weighting approach is applied in a searching procedure wherein residual classification and various parameters are used to generate a weighting function that is used to favor one subcodebook over another.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: December 10, 2002
    Assignee: Conexant Systems, Inc.
    Inventors: Huan-Yu Su, Yang Gao
  • Publication number: 20020161576
    Abstract: The invention provides a speech coding system with a music classifier. An encoder is disposed to receive an input signal and provides a bitstream based upon a speech coding of a portion of the input signal. The encoder provides a classification of the input signal as one of noise, speech, and music. The music classifier analyzes or determines signal properties of the input signal. The music classifier compares the signal properties to thresholds to determine the classification of the input signal.
    Type: Application
    Filed: February 13, 2001
    Publication date: October 31, 2002
    Inventors: Adil Benyassine, Huan-Yu Su
  • Patent number: 6466904
    Abstract: There is provided a speech decoder comprising a means for generating an excitation signal and a means for performing harmonic analysis and synthesis on the excitation signal in order to generate a smooth, periodic speech signal. The speech decoder further comprises a mixing means for mixing the excitation signal with the smooth, periodic signal and a synthesizing means for synthesizing the modified excitation signal into a speech signal that can be played to a user through a listening means. There is also provided a receiver that incorporates a speech decoder such as the decoder described above as well as a method for speech decoding.
    Type: Grant
    Filed: July 25, 2000
    Date of Patent: October 15, 2002
    Assignee: Conexant Systems, Inc.
    Inventors: Yang Gao, Huan-yu Su
  • Patent number: 6463414
    Abstract: There is provided a conference bridge or transcoder configured to intelligently handle multiple speech channels in the contest of a packet network, wherein various speech channels may adhere to variety of speech encoding standards. For example, the conference bridge establishes framing and alignment of multiple incoming speech channels associated with multiple participants, extracts parameters from the speech samples, mixes the parameters, and re-encodes the resulting speech samples for transmission to the participants. In one aspect, a speech processing method comprises decoding a first bitstream according to a first coding scheme to generate first speech samples and a first side information; generating second speech samples and a second side information using the first speech samples and the first side information, for use according to a second coding scheme; and creating a second bitstream, encoded based on the second coding scheme, using the second speech samples and the second side information.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: October 8, 2002
    Assignee: Conexant Systems, Inc.
    Inventors: Huan-Yu Su, Eyal Shlomot, Jes Thyssen, Adil Benyassine, Yang Gao