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公开(公告)号：US07957973B2
公开(公告)日：2011-06-07
申请号：US11878596
申请日：2007-07-25
IPC分类号： G10L13/00
CPC分类号： G10L19/0204 , G10L21/038
摘要： An audio signal interpolation device comprises a spectral movement calculation unit which determines a spectral movement which is indicative of a difference in each of spectral components between a frequency spectrum of a current frame of an input audio signal and a frequency spectrum of a previous frame of the input audio signal stored in a spectrum storing unit. An interpolation band determination unit determines a frequency band to be interpolated by using the frequency spectrum of the current frame and the spectral movement. A spectrum interpolation unit performs interpolation of spectral components in the frequency band for the current frame by using either the frequency spectrum of the current frame or the frequency spectrum of the previous frame.
摘要翻译： 音频信号插值装置包括频谱移动计算单元，其确定表示输入音频信号的当前帧的频谱与前一帧的频谱之间的频谱分量中的每个频谱分量的差的频谱移动 输入存储在频谱存储单元中的音频信号。 插值频带确定单元通过使用当前帧的频谱和频谱移动来确定要内插的频带。 频谱内插单元通过使用当前帧的频谱或前一帧的频谱来对当前帧的频带中的频谱分量进行插值。
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公开(公告)号：US20080071541A1
公开(公告)日：2008-03-20
申请号：US11878596
申请日：2007-07-25
IPC分类号： G10L13/00
CPC分类号： G10L19/0204 , G10L21/038
摘要： An audio signal interpolation device comprises a spectral movement calculation unit which determines a spectral movement which is indicative of a difference in each of spectral components between a frequency spectrum of a current frame of an input audio signal and a frequency spectrum of a previous frame of the input audio signal stored in a spectrum storing unit. An interpolation band determination unit determines a frequency band to be interpolated by using the frequency spectrum of the current frame and the spectral movement. A spectrum interpolation unit performs interpolation of spectral components in the frequency band for the current frame by using either the frequency spectrum of the current frame or the frequency spectrum of the previous frame.
摘要翻译： 音频信号插值装置包括频谱移动计算单元，其确定表示输入音频信号的当前帧的频谱与前一帧的频谱之间的频谱分量中的每个频谱分量的差的频谱移动 输入存储在频谱存储单元中的音频信号。 插值频带确定单元通过使用当前帧的频谱和频谱移动来确定要内插的频带。 频谱内插单元通过使用当前帧的频谱或前一帧的频谱来对当前帧的频带中的频谱分量进行插值。
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公开(公告)号：US07734053B2
公开(公告)日：2010-06-08
申请号：US11390054
申请日：2006-03-27
CPC分类号： G10L19/0204 , G10L19/002 , G10L19/008
摘要： An encoding apparatus compresses a stereo signal using a sum signal and a difference signal of a left component signal and a right component signal of the stereo signal. The encoding apparatus includes a calculating unit that calculates complexity of the sum signal and complexity of the difference signal; a setting unit that sets, based on the complexity, an allocation rate of bits to be allocated in quantizing the sum signal and the difference signal; and a quantizing unit that quantizes the sum signal and the difference signal based on the allocation rate.
摘要翻译： 编码装置使用和信号和立体声信号的左分量信号和右分量信号的差分信号来压缩立体声信号。 编码装置包括计算和信号的复杂度和差分信号的复杂度的计算单元; 设置单元，其基于复杂度设置在量化所述和信号和所述差信号中要分配的比特的分配速率; 以及量化单元，其基于分配率量化和信号和差分信号。
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公开(公告)号：US20070127585A1
公开(公告)日：2007-06-07
申请号：US11390054
申请日：2006-03-27
IPC分类号： H04L23/02
CPC分类号： G10L19/0204 , G10L19/002 , G10L19/008
摘要： An encoding apparatus compresses a stereo signal using a sum signal and a difference signal of a left component signal and a right component signal of the stereo signal. The encoding apparatus includes a calculating unit that calculates complexity of the sum signal and complexity of the difference signal; a setting unit that sets, based on the complexity, an allocation rate of bits to be allocated in quantizing the sum signal and the difference signal; and a quantizing unit that quantizes the sum signal and the difference signal based on the allocation rate.
摘要翻译： 编码装置使用和信号和立体声信号的左分量信号和右分量信号的差分信号来压缩立体声信号。 编码装置包括计算和信号的复杂度和差分信号的复杂度的计算单元; 设置单元，其基于复杂度设置在量化所述和信号和所述差信号中要分配的比特的分配速率; 以及量化单元，其基于分配率量化和信号和差分信号。
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公开(公告)号：US08244524B2
公开(公告)日：2012-08-14
申请号：US12654591
申请日：2009-12-23
IPC分类号： G10L19/14
CPC分类号： G10L19/02
摘要： An encoding apparatus including an SBR (Spectral Band Replication) encoder creates high-frequency-component encoded data with reduced bits. The encoding apparatus converts an input signal into a frequency-domain spectrum signal, divides the converted spectrum signal into an arbitrary number of segments with respect to a time axis and a frequency axis, calculates a spectrum power of each segment and a feature parameter that represents a feature of the corresponding spectrum power, calculates a masking threshold using the calculated spectrum power of each segment, detects a segment having a spectrum power equal to or less than the calculated masking threshold, corrects the spectrum power of the detected segment, and encodes both the corrected spectrum power and the calculated feature parameter. The correction reduces a difference between quantization values, reducing the number of encoded bits.
摘要翻译： 包括SBR（光谱带复制）编码器的编码装置利用减少的位来创建高频分量编码数据。 编码装置将输入信号转换为频域频谱信号，将经转换的频谱信号相对于时间轴和频率轴分割为任意数量的片段，计算每个片段的频谱功率和表示 使用相应频谱功率的特征，使用所计算的每个段的频谱功率来计算掩蔽阈值，检测具有等于或小于所计算的掩蔽阈值的频谱功率的段，校正所检测到的段的频谱功率，并对两者进行编码 校正的频谱功率和计算的特征参数。 校正减少量化值之间的差异，减少编码比特数。
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公开(公告)号：US20080288262A1
公开(公告)日：2008-11-20
申请号：US11902732
申请日：2007-09-25
IPC分类号： G10L19/00
CPC分类号： G10L19/24 , G10L21/038
摘要： A decoding apparatus that decodes a first encoded data that is encoded into a first time range from a low-frequency component of an audio signal, and a second encoded data that is used when creating a high-frequency component of the audio signal from the low-frequency component and encoded into a second time range, into the audio signal. In the decoding apparatus, a high-frequency component compensating unit that compensates the high-frequency component created from the second encoded data based on the first time range. A decoding unit that decodes into the audio signal by synthesizing the high-frequency component compensated by the high-frequency component compensating unit, and the low-frequency component decoded from the first encoded data.
摘要翻译： 一种解码装置，将从音频信号的低频分量编码成第一时间范围的第一编码数据和从低频产生音频信号的高频分量时使用的第二编码数据 频率分量并编码到第二时间范围内，进入音频信号。 在解码装置中，根据第一时间范围，补偿从第二编码数据生成的高频分量的高频分量补偿部。 解码单元，其通过合成由高频分量补偿单元补偿的高频分量和从第一编码数据解码的低频分量来解码为音频信号。
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公开(公告)号：US08073687B2
公开(公告)日：2011-12-06
申请号：US12232096
申请日：2008-09-10
IPC分类号： G10L19/00
CPC分类号： G10L19/0204
摘要： According to an aspect of an embodiment, a method for regenerating an audio signal including a low frequency component and a high frequency component by decoding a coded data including a first coded data and a second coded data, the method comprising the steps of: generating the low frequency component; generating the high frequency component; determining whether the low frequency component has transient characteristics or not; generating a low frequency correction component by removing a stationary component when the audio signal has the transient characteristics; generating a corrected high frequency component by correcting the high-frequency component on the basis of the duration of the low frequency correction component when the audio signal has the transient characteristics; and regenerating the audio signal by synthesizing the low frequency component with the corrected high-frequency component.
摘要翻译： 根据实施例的一个方面，一种用于通过对包括第一编码数据和第二编码数据的编码数据进行解码来再生包括低频分量和高频分量的音频信号的方法，所述方法包括以下步骤： 低频分量; 产生高频分量; 确定低频分量是否具有瞬态特性; 当音频信号具有瞬态特性时通过去除固定分量来产生低频校正分量; 当音频信号具有瞬态特性时，通过基于低频校正分量的持续时间校正高频分量来产生校正的高频分量; 以及通过利用所述校正的高频分量合成所述低频分量来再生所述音频信号。
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公开(公告)号：US20070223716A1
公开(公告)日：2007-09-27
申请号：US11447994
申请日：2006-06-07
CPC分类号： G10L19/26 , G10L21/0232 , G10L21/0364 , H03G5/005 , H03G5/165
摘要： A gain adjusting method and a gain adjusting device for adjusting gain of a processed voice signal that is obtained by signal processing an input voice signal are disclosed. According to the gain adjusting method,a masking property of the processed voice signal is computed, andgain is adjusted for every frequency if the frequency is masked according to the masking property, while canceling a difference between the processed voice signal and the input voice signal where the frequency is not masked.
摘要翻译： 公开了一种增益调整方法和增益调整装置，用于调整通过信号处理输入语音信号而获得的处理语音信号的增益。 根据增益调整方法，计算处理后的声音信号的掩蔽特性，并且如果根据掩蔽特性屏蔽频率，则针对每个频率调整增益，同时消除处理的语音信号与输入的语音信号之间的差异 频率未被屏蔽。
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9.发明授权Voice packet loss concealment device, voice packet loss concealment method, receiving terminal, and voice communication system 有权语音包丢失隐藏设备，语音丢包隐藏方法，接收终端和语音通信系统公开(公告)号：US07650280B2
公开(公告)日：2010-01-19
申请号：US11065416
申请日：2005-02-24
CPC分类号： G10L19/005 , H04L29/06027 , H04L65/607 , H04L65/80 , H04M7/006
摘要： In a voice packet communication system, a voice packet loss concealment device compensates for the deterioration of voice quality due to voice packet loss. In the device, a detecting section detects a loss of a voice packet and outputting information; an estimating section estimates the voice characteristics of the lost segment using a pre-loss voice packet received before the lost segment or a post-loss voice packet received after the lost segment; a pitch signal generating section generates a pitch signal having the voice characteristics; and a lost packet generating section outputs the pitch signal generated by the pitch signal generating section, with the voice characteristics estimated by the estimating section, which allows abnormal noise and feeling of mute, subjective deterioration of naturalness and continuity to be improved, and the voice packet loss concealment to be further improved.
摘要翻译： 在语音分组通信系统中，语音分组丢失隐藏装置补偿语音分组丢失导致的语音质量的恶化。 在该装置中，检测部检测出语音分组的丢失并输出信息; 估计部分使用在丢失段之前接收到的丢失前话音分组或在丢失分段之后接收到的丢失后语音分组来估计丢失分段的语音特性; 音调信号产生部分产生具有语音特征的音调信号; 并且丢失分组产生部分输出由音调信号产生部分生成的音调信号与由估计部分估计的语音特征，其允许异常噪声和静音感觉，自然性和连续性的主观恶化被改善，并且语音 丢包隐藏进一步提高。
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公开(公告)号：US08073050B2
公开(公告)日：2011-12-06
申请号：US12068833
申请日：2008-02-12
IPC分类号： H04N7/12
CPC分类号： G10L21/038 , G10L19/083
摘要： When creating SBR data in a the low-resolution mode, an encoding device divides a high-frequency component of input audio data being encoded by SBR method into a high-frequency band and a low-frequency band, and calculates an average high-frequency power value that indicates the average value of the power in the high-frequency band of the audio data, as well as an average low-frequency power value that indicates the average value of the power in the low-frequency band of the audio data. The encoding device then compares the average high-frequency power value and the average low-frequency power value, selecting the smaller of the two. The encoding device then corrects the power of the high-frequency component of the signal being encoded by the SBR method so that it equals the selected average power value.
摘要翻译： 当以低分辨率模式创建SBR数据时，编码装置将由SBR方法编码的输入音频数据的高频分量划分成高频带和低频带，并计算平均高频 指示音频数据的高频带中的功率的平均值的功率值以及指示音频数据的低频带中的功率的平均值的平均低频功率值。 然后，编码装置比较平均高频功率值和平均低频功率值，选择两者中较小的一个。 然后，编码装置校正由SBR方法编码的信号的高频分量的功率，使得其等于所选择的平均功率值。
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