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    TECNICA PARA CODIFICAR/DECODIFICAR INDICES DE LIBRO DE CODIGOS PARA ESPECTRO MDCT CUANTIFICADO EN CODECS DE AUDIO Y DIALOGO ESCALABLES.
    3.
    发明专利
    TECNICA PARA CODIFICAR/DECODIFICAR INDICES DE LIBRO DE CODIGOS PARA ESPECTRO MDCT CUANTIFICADO EN CODECS DE AUDIO Y DIALOGO ESCALABLES. 未知

    公开(公告)号：MX2010004823A

    公开(公告)日：2010-06-11

    申请号：MX2010004823

    申请日：2008-11-04

    Applicant: QUALCOMM INC

    Inventor： HUANG PENGJUN ,  SRINIVASAMURTHY NAVEEN B ,  REZNIK YURIY ,  CHIVUKULA RAVIKIRAN

    IPC: G10L19/14

    Abstract: Indices de libro de códigos para un códec de audio y diálogo escalable pueden ser codificados de manera eficiente con base en distribuciones de probabilidad anticipadas para dichos índices de libros de códigos; se puede obtener una señal residual de una capa de codificación basada en Predicción Lineal Excitada por Código (CELP), donde la señal residual es una diferencia entre una señal de audio original y una versión reconstruida de la señal de audio original; la señal residual puede ser transformada en una capa de transformada tipo Transformada de Coseno Discreta (DCT) para obtener un espectro de transformada correspondiente; el espectro de transformada se divide en una pluralidad de bandas espectrales, donde cada banda espectral tiene una pluralidad de líneas espectrales; una pluralidad de diferentes libros de códigos son entonces seleccionados para codificar las bandas espectrales, donde cada libro de códigos es asociado con un índice de libros de códigos; una pluralidad de índices de libros de códigos asociados con los libros de códigos seleccionados son entonces codificados juntos para obtener un código de descriptor que representa de manera más compacta los índices de libros de códigos.

    5.
    发明专利
    未知

    公开(公告)号：BRPI0709263A2

    公开(公告)日：2011-06-28

    申请号：BRPI0709263

    申请日：2007-03-29

    Applicant: QUALCOMM INC

    Inventor： REZNIK YURIY ,  LUDWIN ALBERT SCOTT ,  CHUNG HYUKJUNE ,  GARUDADRI HARINATH ,  SRINIVASAMURTHY NAVEEN B ,  SAGETONG PHOOM

    IPC: G06F17/14 ,  H04N7/26

    Abstract: Techniques for efficiently performing full and scaled transforms on data received via full and scaled interfaces, respectively, are described and comprise (1) performing a first transform on a block of first input values to obtain a block of first output values by scaling the block to obtain scaled input values, performing a scaled one-dimensional (1D) transform on each row of the block, and performing a scaled 1D transform on each column of the block; and (2) performing a second transform on a block of second input values to obtain a block of second output values by performing a scaled 1D transform on each row of the block, performing a scaled 1D transform on each column of the block, and scaling the block.

    SCALABLE SPEECH AND AUDIO ENCODING USING COMBINATORIAL ENCODING OF MDCT SPECTRUM
    6.
    发明专利
    SCALABLE SPEECH AND AUDIO ENCODING USING COMBINATORIAL ENCODING OF MDCT SPECTRUM 未知

    公开(公告)号：CA2701281A1

    公开(公告)日：2009-04-30

    申请号：CA2701281

    申请日：2008-10-22

    Applicant: QUALCOMM INC

    Inventor： REZNIK YURIY ,  SRINIVASAMURTHY NAVEEN B ,  CHIVUKULA RAVI KIRAN ,  HUANG PENGJUN

    IPC: G10L19/14 ,  G10L19/02

    Abstract: A scalable speech and audio codec is provided that implements combinatorial spectrum encoding. A residual signal is obtained from a Code Excited Linear Prediction (CELP)-based encoding layer, where the residual signal is a difference between an original audio signal and a reconstructed version of the original audio signal. The residual signal is transformed at a Discrete Cosine Transform (DCT)-type transform layer to obtain a corresponding transform spectrum having a plurality of spectral lines. The transform spectrum spectral lines are transformed using a combinatorial position coding technique. The combinatorial position coding technique includes generating a lexicographical index for a selected subset of spectral lines, where each lexicographic index represents one of a plurality of possible binary strings representing the positions of the selected subset of spectral lines. The lexicographical index represents non-zero spectral lines in a binary string in fewer bits than the length of the binary string.

    TECHNIQUE FOR ENCODING/DECODING OF CODEBOOK INDICES FOR QUANTIZED MDCT SPECTRUM IN SCALABLE SPEECH AND AUDIO CODECS
    8.
    发明专利
    TECHNIQUE FOR ENCODING/DECODING OF CODEBOOK INDICES FOR QUANTIZED MDCT SPECTRUM IN SCALABLE SPEECH AND AUDIO CODECS 未知

    公开(公告)号：CA2703700A1

    公开(公告)日：2009-05-07

    申请号：CA2703700

    申请日：2008-11-04

    Applicant: QUALCOMM INC

    Inventor： REZNIK YURIY ,  HUANG PENGJUN ,  SRINIVASAMURTHY NAVEEN B ,  CHIVUKULA RAVI KIRAN

    IPC: G10L19/14

    Abstract: Codebook indices for a scalable speech and audio codec may be efficiently encoded based on anticipated probability distributions for such codebook indices. A residual signal from a Code Excited Linear Prediction (CELP)-based encoding layer may be obtained, where the residual signal is a difference between an original audio signal and a reconstructed version of the original audio signal. The residual signal may be transformed at a Discrete Cosine Transform (DCT)-type transform layer to obtain a corresponding transform spectrum. The transform spectrum is divided into a plurality of spectral bands, where each spectral band having a plurality of spectral lines. A plurality of different codebooks are then selected for encoding the spectral bands, where each codebook is associated with a codebook index. A plurality of codebook indices associated with the selected codebooks are then encoded together to obtain a descriptor code that more compactly represents the codebook indices.

    TRANSFORM DESIGN WITH SCALED AND NON-SCALED INTERFACES
    10.
    发明专利
    TRANSFORM DESIGN WITH SCALED AND NON-SCALED INTERFACES 未知

    公开(公告)号：CA2644505A1

    公开(公告)日：2007-10-11

    申请号：CA2644505

    申请日：2007-03-29

    Applicant: QUALCOMM INC

    Inventor： SAGETONG PHOOM ,  GARUDADRI HARINATH ,  SRINIVASAMURTHY NAVEEN B ,  LUDWIN ALBERT SCOTT ,  CHUNG HYUKJUNE ,  REZNIK YURIY

    IPC: G06F17/14

    Abstract: Techniques for efficiently performing full and scaled transforms on data received via full and scaled interfaces, respectively, are described and comprise (1) performing a first transform on a block of first input values to obtain a block of first output values by scaling the block to obtain scaled input values, performing a scaled one-dimensional (1D) transform on each row of the block, and performing a scaled 1D transform on each column of the block; and (2) performing a second transform on a block of second input values to obtain a block of second output values by performing a scaled 1D transform on each row of the block, performing a scaled 1D transform on each column of the block, and scaling the block.

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