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    • 1. 发明公开
    • METHOD AND DEVICE FOR BANDWIDTH EXTENSION
    • VERFAHREN UND VORRICHTUNG ZUR BANDBREITENERWEITERUNG EINES AUDIOSIGNALS
    • EP2674942A2
    • 2013-12-18
    • EP12745345.4
    • 2012-02-08
    • LG Electronics Inc.Gwangju Institute of Science and Technology
    • JEONG, Gyu HyeokLEE, Young HanJEON, Hye JeongKIM, Hong KookKANG, In GyuKIM, Lag Young
    • G10L19/00G10L19/02G10L21/02
    • G10L19/00G10L19/0212G10L21/0388
    • Method and device of extending a signal band of a voice or audio signal are provided. The bandwidth extension method includes the steps of: performing a modified discrete cosine transform (MDCT) process on an input signal to generate a first transform signal; generating a second transform signal and a third transform signal on the basis of the first transform signal; generating normalized components and energy components of the first transform signal, the second transform signal, and the third transform signal therefrom; generating an extended normalized component from the normalized components and generating an extended energy component from the energy components; generating an extended transform signal on the basis of the extended normalized component and the extended energy component; and performing an inverse MDCT (IMDCT) process on the extended transform signal.
    • 提供扩展语音或音频信号的信号频带的方法和装置。 带宽扩展方法包括以下步骤:对输入信号执行修正的离散余弦变换(MDCT)处理,以产生第一变换信号; 基于所述第一变换信号生成第二变换信号和第三变换信号; 从其产生第一变换信号,第二变换信号和第三变换信号的归一化分量和能量分量; 从所述归一化分量生成扩展归一化分量并从所述能量分量产生扩展能量分量; 基于扩展归一化分量和扩展能量分量生成扩展变换信号; 并对扩展变换信号执行逆MDCT(IMDCT)处理。
    • 7. 发明公开
    • METHOD AND APPARATUS FOR PROCESSING AN AUDIO SIGNAL
    • 用于处理音频信号的方法和设备
    • EP2557566A2
    • 2013-02-13
    • EP11766191.8
    • 2011-04-08
    • LG ELECTRONICS INC.
    • JEONG, Gyu HyeokJEON, Hye JeongLEE, Byung SukLEE, Chang Heon
    • G10L19/12
    • G10L19/008G10L19/038G10L19/04G10L19/06G10L19/07G10L2019/0005
    • The present invention relates to a method for processing an audio signal, comprising the following steps: performing a linear predictive analysis on the current frame of an audio signal so as to generate a first target vector, which is a target vector of a first stage, on the basis of a plurality of linear prediction transform coefficients; performing vector quantization on the first target vector so as to acquire a predetermined number of first temporary candidate code vectors of the first stage; calculating first temporary candidate errors, which are errors between the first temporary candidate code vectors and the first target vector; and determining a first number, which is the number of the first candidate code vectors, on the basis of the first temporary candidate errors, and acquiring first final candidate code vectors in the same amount as the first number.
    • 本发明涉及一种音频信号的处理方法,包括以下步骤:对音频信号的当前帧进行线性预测分析,生成第一阶段的目标矢量即第一目标矢量, 基于多个线性预测变换系数; 对第一目标矢量执行矢量量化以获取第一级的预定数量的第一临时候选码矢量; 计算作为所述第一临时候选码矢量与所述第一目标矢量之间的误差的第一临时候选误差; 以及基于第一临时候选误差确定作为第一候选码矢量的数量的第一数目,并且获取与第一数目相同量的第一最终候选码矢量。