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    • 71. 发明授权
    • Method for searching fixed codebook based upon global pulse replacement
    • 基于全局脉冲替换检索固定码本的方法
    • US07739108B2
    • 2010-06-15
    • US10740310
    • 2003-12-17
    • Eung-Don LeeDo-Young Kim
    • Eung-Don LeeDo-Young Kim
    • G10L19/00G10L19/12H04L12/66
    • G10L19/032G10L2019/0013
    • The present research can decrease the amount of computation and enhance speech quality by using a global pulse replacement method in a fixed codebook search. The fixed codebook search method in a speech encoder based upon global pulse replacement, includes the steps of: (a) computing absolute values of the pulse-position likelihood-estimator vectors; (b) temporarily obtaining a codebook vector; (c) computing a mathematical equation by replacing a pulse; (d) determining whether a value computed based upon the mathematical equation is increased after pulse replacement; (e) obtaining a new codebook vector by replacing the pulse; and (f) maintaining a previous codebook vector.
    • 本研究可以通过在固定码本搜索中使用全局脉冲替换方法来减少计算量并提高语音质量。 基于全局脉冲替换的语音编码器中的固定码本搜索方法包括以下步骤:(a)计算脉冲位置似然估计器矢量的绝对值; (b)暂时获得码本矢量; (c)通过替换脉冲来计算数学方程; (d)确定在脉冲置换之后基于数学方程计算的值是否增加; (e)通过替换脉冲获得新的码本矢量; 和(f)保持先前的码本向量。
    • 75. 发明授权
    • Correlation apparatus based on symmetry of correlation coefficient and method thereof
    • 基于相关系数对称的相关装置及其方法
    • US07664165B2
    • 2010-02-16
    • US11284215
    • 2005-11-21
    • Hun-Sik KangJung-Sik KimDo-Young Kim
    • Hun-Sik KangJung-Sik KimDo-Young Kim
    • H04B1/00
    • G06F17/15H04L27/2662
    • Provided is a correlation apparatus based on symmetry of a correlation coefficient that can reduce complexity of hardware by reducing the number of adders and multipliers. Accordingly, when values of a real number part and an imaginary number part are exchanged with respect to a middle point of a correlation coefficient sequence and divided into two parts of left and right by the middle point of the correlation coefficient sequence, the values of the real number part and the imaginary number part are even-symmetrical with respect to the middle point of the divided two parts. Therefore, the number of the adders required for forming the correlation apparatus is reduced by at least 20% and the number of the multipliers is reduced by at least 70% in comparison with the 62 adders and the 64 multipliers required for a conventional correlation apparatus.
    • 提供了一种基于相关系数的对称性的相关装置,其可以通过减少加法器和乘法器的数量来降低硬件的复杂度。 因此,当实数部分和虚数部分的值相对于相关系数序列的中点被交换并且被相关系数序列的中点分成左和右的两部分时, 实数部分和虚数部分相对于分割的两部分的中点是均匀对称的。 因此,与常规相关装置所需的62个加法器和64个乘法器相比,形成相关装置所需的加法器的数量减少了至少20%,并且乘法器的数量减少了至少70%。
    • 76. 发明授权
    • Apparatus and method for concealing highband error in split-band wideband voice codec and decoding
    • 用于隐藏分频宽带语音编解码器和解码中的高频误差的装置和方法
    • US07596492B2
    • 2009-09-29
    • US10943118
    • 2004-09-15
    • Jongmo SungDo-Young Kim
    • Jongmo SungDo-Young Kim
    • G10L19/12
    • G10L19/005G10L19/0204G10L19/04
    • An apparatus for concealing a highband error in a spilt-band wideband voice codec in accordance with the present invention is disclosed. The apparatus includes: a lowband LPC coefficient extracting unit for extracting a lowband linear predictive coding (LPC) coefficient from a lowband voice signal passed by a lowband decoding unit; a highband excitation signal generating unit for generating a highband excitation signal based on the lowband voice signal and the lowband LPC coefficient; a highband LPC coefficient generating unit for generating a highband LPC coefficient based on the lowband LPC coefficient; a highband voice synthesizing unit for synthesizing a highband voice signal based on the highband excitation signal and the highband LPC coefficient; and a high pass filtering unit for removing a lowband component of the synthesized highband voice signal by the highband voice synthesis unit and generating the synthesized highband voice signal.
    • 公开了一种用于隐藏根据本发明的溢出带宽带语音编解码器中的高频误差的装置。 该装置包括:低频LPC系数提取单元,用于从低频解码单元通过的低频语音信号中提取低频带线性预测编码(LPC)系数; 高频激励信号发生单元,用于基于低频带语音信号和低频带LPC系数产生高频激励信号; 高频LPC系数产生单元,用于基于低频带LPC系数产生高频LPC系数; 高频语音合成单元,用于根据高频激励信号和高频LPC系数合成高频语音信号; 以及高通滤波单元,用于通过高频语音合成单元去除合成高频语音信号的低频分量,并产生合成的高频语音信号。