Patents by Inventor Nicola Chong-White
Nicola Chong-White 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).
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Patent number: 8150685Abstract: A method and apparatus for a voice transcoder that converts a bitstream representing frames of data encoded according to a first voice compression standard to a bitstream representing frames of data according to a second voice compression standard using perceptual weighting that uses tuned weighting factors, such that the bitstream of a second voice compression standard to produce a higher quality decoded voice signal than a comparable tandem transcoding solution.Type: GrantFiled: April 29, 2011Date of Patent: April 3, 2012Assignee: Onmobile Global LimitedInventors: Marwan A. Jabri, Jianwei Wang, Nicola Chong-White, Michael Ibrahim
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Publication number: 20110264448Abstract: A method and apparatus for a voice transcoder that converts a bitstream representing frames of data encoded according to a first voice compression standard to a bitstream representing frames of data according to a second voice compression standard using perceptual weighting that uses tuned weighting factors, such that the bitstream of a second voice compression standard to produce a higher quality decoded voice signal than a comparable tandem transcoding solution.Type: ApplicationFiled: April 29, 2011Publication date: October 27, 2011Applicant: ONMOBILE GLOBAL LIMITEDInventors: MARWAN A. JABRI, JIANWEI WANG, NICOLA CHONG-WHITE, MICHAEL IBRAHIM
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Patent number: 7962333Abstract: A method and apparatus for a voice transcoder that converts a bitstream representing frames of data encoded according to a first voice compression standard to a bitstream representing frames of data according to a second voice compression standard using perceptual weighting that uses tuned weighting factors, such that the bitstream of a second voice compression standard to produce a higher quality decoded voice signal than a comparable tandem transcoding solution.Type: GrantFiled: August 2, 2007Date of Patent: June 14, 2011Assignee: Onmobile Global LimitedInventors: Marwan A. Jabri, Jianwei Wang, Nicola Chong-White, Michael Ibrahim
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Patent number: 7848922Abstract: An apparatus and method for encoding and decoding a voice signal. The apparatus includes an encoder configured to generate an output bitstream signal from an input voice signal. The output bitstream signal is associated with at least a first standard of a first plurality of CELP voice compression standards. Additionally, the apparatus includes a decoder configured to generate an output voice signal from an input bitstream signal. The input bitstream signal is associated with at least a first standard of a second plurality of CELP voice compression standards. The CELP encoder includes a plurality of codec-specific encoder modules. Additionally, the CELP encoder includes a plurality of generic encoder modules. The CELP decoder includes a plurality of codec-specific decoder modules. Additionally, the CELP decoder includes a plurality of generic decoder modules.Type: GrantFiled: August 2, 2007Date of Patent: December 7, 2010Inventors: Marwan A. Jabri, Nicola Chong-White, Jianwei Wang
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Patent number: 7469209Abstract: A method and apparatus for frame classification and rate determination in voice transcoders. The apparatus includes a classifier input parameter preparation module that unpacks the bitstream from the source codec and selects the codec parameters to be used for classification, parameter buffers that store previous input and output parameters of previous frames, and a frame classification and rate decision module that uses the source codec parameters from the current frame and zero or more frames to determine the frame class, rate, and classification feature parameters for the destination codec. The classifier input parameter preparation module separates the bitstream code and unquantizes the sub-codes into the codec parameters. The frame classification and rate decision module comprises M sub-classifiers and a final decision module.Type: GrantFiled: August 14, 2003Date of Patent: December 23, 2008Assignee: Dilithium Networks Pty Ltd.Inventors: Nicola Chong-White, Jianwei Wang, Marwan A. Jabri
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Patent number: 7433815Abstract: A variable-rate voice transcoder that transcodes a bitstream representing frames of data encoded according to a first compression standard to a bitstream representing frames of data according to a second compression standard; the second compression standard defines a variable-rate voice codec. The method includes unquantizing a bitstream into a first set of parameters compatible with the first compression standard. The first set of parameters in addition to external control commands are then used to determine a frame class and a rate for the second compression standard. Next, the first set of parameters are transformed into a second set of parameters compatible with the second compression standard according to the frame-classification and rate determination decision. Lastly, the second set of parameters is packed into a bitstream compatible with the second compression standard.Type: GrantFiled: September 10, 2003Date of Patent: October 7, 2008Assignee: Dilithium Networks Pty Ltd.Inventors: Marwan A. Jabri, Jianwei Wang, Nicola Chong-White
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Publication number: 20080195384Abstract: A method and apparatus for a voice transcoder that converts a bitstream representing frames of data encoded according to a first voice compression standard to a bitstream representing frames of data according to a second voice compression standard using perceptual weighting that uses tuned weighting factors, such that the bitstream of a second voice compression standard to produce a higher quality decoded voice signal than a comparable tandem transcoding solution.Type: ApplicationFiled: August 2, 2007Publication date: August 14, 2008Applicant: Dilithium Networks Pty LimitedInventors: Marwan A. Jabri, Jianwei Wang, Nicola Chong-White, Michael Ibrahim
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Patent number: 7363218Abstract: An apparatus and method for mapping CELP parameters between a source codec and a destination codec. The apparatus includes an LSP mapping module, an adaptive codebook mapping module coupled to the LSP mapping module, and a fixed codebook mapping module coupled to the LSP mapping module and the adaptive codebook mapping module. The LSP mapping module includes an LP overflow module and an LSP parameter modification module. The adaptive codebook mapping module includes a first pitch gain codebook. The fixed codebook mapping module includes a first target processing module, a pulse search module, a fixed codebook gain estimation module, a pulse position searching module.Type: GrantFiled: October 23, 2003Date of Patent: April 22, 2008Assignee: Dilithium Networks Pty. Ltd.Inventors: Marwan A. Jabri, Nicola Chong-White, Jianwei Wang
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Patent number: 7263481Abstract: A method and apparatus for a voice transcoder that converts a bitstream representing frames of data encoded according to a first voice compression standard to a bitstream representing frames of data according to a second voice compression standard using perceptual weighting that uses tuned weighting factors, such that the bitstream of a second voice compression standard to produce a higher quality decoded voice signal than a comparable tandem transcoding solution.Type: GrantFiled: January 9, 2004Date of Patent: August 28, 2007Assignee: Dilithium Networks Pty LimitedInventors: Marwan A. Jabri, Jianwei Wang, Nicola Chong-White, Michael Ibrahim
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Patent number: 7254533Abstract: An apparatus and method for encoding and decoding a voice signal. The apparatus includes an encoder configured to generate an output bitstream signal from an input voice signal. The output bitstream signal is associated with at least a first standard of a first plurality of CELP voice compression standards. Additionally, the apparatus includes a decoder configured to generate an output voice signal from an input bitstream signal. The input bitstream signal is associated with at least a first standard of a second plurality of CELP voice compression standards. The CELP encoder includes a plurality of codec-specific encoder modules. Additionally, the CELP encoder includes a plurality of generic encoder modules. The CELP decoder includes a plurality of codec-specific decoder modules. Additionally, the CELP decoder includes a plurality of generic decoder modules.Type: GrantFiled: October 17, 2003Date of Patent: August 7, 2007Assignee: Dilithium Networks Pty Ltd.Inventors: Marwan A. Jabri, Nicola Chong-White, Jianwei Wang
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Publication number: 20050053130Abstract: A variable rate compressed voice signal domain transcoder that transcodes a bitstream representing frames of data encoded according to a first voice compression standard to a bitstream representing frames of data according to a second voice compression standard; the second voice compression standard defines a variable-rate voice codec. The method includes unquantizing a bitstream into a first set of parameters compatible with a first compression standard. The first set of parameters in addition to external control commands are then used to determine the frame class and rate for the second compression standard. Next, the first set of parameters are transformed into a second set of parameters compatible with a second compression standard according to the frame-classification and rate determination decision without converting the first set of parameters to an analog or digital voice waveform representation.Type: ApplicationFiled: September 10, 2003Publication date: March 10, 2005Applicant: Dilithium Holdings, Inc.Inventors: Marwan Jabri, Jianwei Wang, Nicola Chong-White
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Publication number: 20050049855Abstract: A method and apparatus for frame classification and rate determination in voice transcoders. The apparatus includes a classifier input parameter preparation module that unpacks the bitstream from the source codec and selects the codec parameters to be used for classification, parameter buffers that store previous input and output parameters of previous frames, and a frame classification and rate decision module that uses the source codec parameters from the current frame and zero or more frames to determine the frame class, rate, and classification feature parameters for the destination codec. The classifier input parameter preparation module separates the bitstream code and unquantizes the sub-codes into the codec parameters. These codec parameters may include line spectral frequencies, pitch lag, pitch gains, fixed codebook gains, fixed codebook vectors, rate and frame energy. The frame classification and rate decision module comprises M sub-classifiers and a final decision module.Type: ApplicationFiled: August 14, 2003Publication date: March 3, 2005Applicant: Dilithium Holdings, Inc.Inventors: Nicola Chong-White, Jianwei Wang, Marwan Jabri
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Publication number: 20040172402Abstract: An apparatus and method for mapping CELP parameters between a source codec and a destination codec. The apparatus includes an LSP mapping module, an adaptive codebook mapping module coupled to the LSP mapping module, and a fixed codebook mapping module coupled to the LSP mapping module and the adaptive codebook mapping module. The LSP mapping module includes an LP overflow module and an LSP parameter modification module. The adaptive codebook mapping module includes a first pitch gain codebook. The fixed codebook mapping module includes a first target processing module, a pulse search module, a fixed codebook gain estimation module, a pulse position searching module.Type: ApplicationFiled: October 23, 2003Publication date: September 2, 2004Applicant: Dilithium Networks Pty Ltd.Inventors: Marwan A. Jabri, Nicola Chong-White, Jianwei Wang
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Publication number: 20040158463Abstract: A method and apparatus for a voice transcoder that converts a bitstream representing frames of data encoded according to a first voice compression standard to a bitstream representing frames of data according to a second voice compression standard using perceptual weighting that uses tuned weighting factors, such that the bitstream of a second voice compression standard to produce a higher quality decoded voice signal than a comparable tandem transcoding solution.Type: ApplicationFiled: January 9, 2004Publication date: August 12, 2004Applicant: Dilithium Networks Pty LimitedInventors: Marwan A. Jabri, Jianwei Wang, Nicola Chong-White, Michael Ibrahim