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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：US20090070120A1
公开(公告)日：2009-03-12
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：US20080219344A1
公开(公告)日：2008-09-11
申请号：US12068833
申请日：2008-02-12
IPC分类号： H04B1/66
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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公开(公告)号：US20080154589A1
公开(公告)日：2008-06-26
申请号：US12073276
申请日：2008-03-03
IPC分类号： G10L19/00
CPC分类号： G10L19/035 , G10L25/27
摘要： To alleviate degradation of sound quality which may be caused by pre-echoes and bit starvation. An acoustic analyzer analyzes an audio signal to calculate perceptual entropy indicating how many bits are required for quantization. A coded bit count monitor monitors the number of coded bits produced from the audio signal and calculates the number of available bits for the current frame. Based on the combination of the perceptual entropy and the number of available bits, a frame division number determiner determines a division number N for dividing a frame of the audio signal into N blocks. An orthogonal transform processor divides a frame by the determined division number and subjects each divided block of the audio signal to an orthogonal transform process, thereby obtaining orthogonal transform coefficients. A quantizer quantizes the orthogonal transform coefficients on a divided block basis.
摘要翻译： 以缓解由回声和位饥饿引起的声音质量下降。 声学分析仪分析音频信号以计算感知熵，指示量化所需的位数。 编码比特计数监视器监视从音频信号产生的编码比特数，并计算当前帧的可用比特数。 基于感知熵与可用比特数的组合，帧分割数确定器确定用于将音频信号的帧划分成N个块的分割数N. 正交变换处理器将帧除以确定的分割数，并将音频信号的每个分割块进行正交变换处理，从而获得正交变换系数。 量化器基于分割块量化正交变换系数。
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25.发明授权Audio signal encoding device, method, and medium by correcting allowable error powers for a tonal frequency spectrum 有权音频信号编码装置，方法和介质，通过校正音调频谱的容许误差功率公开(公告)号：US09076440B2
公开(公告)日：2015-07-07
申请号：US12367963
申请日：2009-02-09
IPC分类号： G10L25/00 , G10L19/00 , G10L21/00 , G10L19/035 , G10L19/02
CPC分类号： G10L19/035 , G10L19/0212
摘要： A disclosed encoding device converts an audio signal into frequency spectra, determines allowable error powers with respect to bands divided by the frequency of the audio signal by a predetermined with, detects a tonal frequency spectrum from the frequency spectra, and detects a band containing the frequency spectrum. Using the detection result and the allowable error powers, the encoding device performs correction such that allowable error powers determined by a power determining unit with respect to bands adjacent to the band detected by a detecting unit become smaller than the powers of the frequency spectra with respect to the adjacent bands, and quantizes each of frequency spectra having greater powers than the corrected allowable error powers.
摘要翻译： 所公开的编码装置将音频信号转换为频谱，将相对于由音频信号的频率除以预定宽度的频带的允许误差功率确定，从频谱检测音调频谱，并检测包含频率的频带 光谱。 使用检测结果和允许的误差功率，编码装置执行校正，使得由功率确定单元确定的关于由与检测单元检测到的频带相邻的频带的容许误差功率变得小于相对于频谱的功率的功率 并且量化具有比校正的允许误差功率更大的功率的每个频谱。
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26.发明授权Decoding method and apparatus for an audio signal through high frequency compensation 有权通过高频补偿的音频信号的解码方法和装置公开(公告)号：US08788275B2
公开(公告)日：2014-07-22
申请号：US11902325
申请日：2007-09-20
CPC分类号： G10L19/24 , G10L21/0364
摘要： A decoding apparatus decodes a first encoded data that is encoded from a low-frequency component of an audio signal, and a second encoded data that is used when creating a high-frequency component of an audio signal from a low-frequency component and encoded in accordance with a certain bandwidth, into the audio signal. In the decoding apparatus, a high-frequency component detecting unit divides the high-frequency component into bands with a certain interval range correspondingly to the certain bandwidth, and detects magnitude of the high-frequency components corresponding to each of the bands. A high-frequency component compensating unit compensates the high-frequency components based on the magnitude of the high-frequency components corresponding to each of the bands detected by the high-frequency component detecting unit. A decoding unit that decodes the low-frequency component decoded from the first encoded data, and the high-frequency components compensated by the high-frequency component compensating unit, into the audio signal.
摘要翻译： 解码装置对从音频信号的低频分量编码的第一编码数据和从低频分量创建音频信号的高频分量而使用的第二编码数据进行解码， 按照一定的带宽，进入音频信号。 在解码装置中，高频成分检测部将该高频成分与特定带宽对应地设定为一定的间隔范围的频带，并检测与各频带对应的高频成分的大小。 高频分量补偿单元基于与由高频分量检测单元检测到的每个频带对应的高频分量的大小来补偿高频分量。 解码单元，将从第一编码数据解码的低频分量和由高频分量补偿单元补偿的高频分量解码成音频信号。
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27.发明授权公开(公告)号：US08612219B2
公开(公告)日：2013-12-17
申请号：US11907341
申请日：2007-10-11
CPC分类号： G10L19/002 , G10L21/038
摘要： An SBR encoder includes a filter bank that receives an input signal, a time/frequency grid generator that controls a number of bits of various parameters, a parameter calculator that calculates various parameters, a parameter coding unit that encodes the parameters, an upper-limit number-of-bit storage unit that stores an upper limit of the number of bit of encoded data of high-frequency component finally generated in a high-pass encoding process, and a number-of-bit controller. The number-of-bit controller controls the high-pass encoding process by preferentially encoding a parameter having a large influence to sound quality and not encoding a parameter having a small influence to the sound quality relative to a plurality of parameters, so that the number of bits of the encoded data of high-frequency component finally generated in the high-pass encoding process becomes equal to or less than the upper limit to be stored in the upper-limit number-of-bit storage unit.
摘要翻译： SBR编码器包括接收输入信号的滤波器组，控制各种参数的位数的时间/频率网格发生器，计算各种参数的参数计算器，对参数进行编码的参数编码单元，上限 位数存储单元，其存储在高通编码处理中最终生成的高频分量的编码数据的比特数的上限，以及比特数控制器。 位数控制器通过优先编码对声音质量影响很大的参数并且不对相对于多个参数对声音质量影响小的参数进行编码来控制高通编码处理，使得数字 在高通编码处理中最终生成的高频分量的编码数据的比特数变得等于或小于要存储在上限位数存储单元中的上限。
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公开(公告)号：US07930185B2
公开(公告)日：2011-04-19
申请号：US12073276
申请日：2008-03-03
CPC分类号： G10L19/035 , G10L25/27
摘要： To alleviate degradation of sound quality which may be caused by pre-echoes and bit starvation. An acoustic analyzer analyzes an audio signal to calculate perceptual entropy indicating how many bits are required for quantization. A coded bit count monitor monitors the number of coded bits produced from the audio signal and calculates the number of available bits for the current frame. Based on the combination of the perceptual entropy and the number of available bits, a frame division number determiner determines a division number N for dividing a frame of the audio signal into N blocks. An orthogonal transform processor divides a frame by the determined division number and subjects each divided block of the audio signal to an orthogonal transform process, thereby obtaining orthogonal transform coefficients. A quantizer quantizes the orthogonal transform coefficients on a divided block basis.
摘要翻译： 以缓解由回声和位饥饿引起的声音质量下降。 声学分析仪分析音频信号以计算感知熵，指示量化所需的位数。 编码比特计数监视器监视从音频信号产生的编码比特数，并计算当前帧的可用比特数。 基于感知熵与可用比特数的组合，帧分割数确定器确定用于将音频信号的帧划分成N个块的分割数N. 正交变换处理器将帧除以确定的分割数，并将音频信号的每个分割块进行正交变换处理，从而获得正交变换系数。 量化器基于分割块量化正交变换系数。
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公开(公告)号：US08619999B2
公开(公告)日：2013-12-31
申请号：US12563890
申请日：2009-09-21
CPC分类号： G10L19/008 , G10L19/0204
摘要： A decoded sound analysis unit (104) calculates, regarding the frequency-region stereo signals L(b) and R(b) decoded by the PS decoding unit (103), a second degree of similarity (109) and a second intensity difference (110) from the decoded sound signals. A spectrum correction unit (105) detects a distortion added by the parametric-stereo conversion by comparing the second degree of similarity (109) and the second intensity difference (110) calculated at the decoding side with the first degree of similarity (107) and the first intensity difference (108) calculated and transmitted from the encoding side, and corrects the spectrum of the frequency-region stereo decoded signals L(b) and R(b).
摘要翻译： 解码声音分析单元（104）针对由PS解码单元（103）解码的频域立体声信号L（b）和R（b），计算第二相似度（109）和第二强度差 110）。 频谱校正单元（105）通过将第二相似度（109）和在解码侧计算的第二强度差（110）与第一相似度（107）进行比较来检测由参数立体声转换所添加的失真，以及 从编码侧计算并发送第一强度差（108），并校正频域立体声解码信号L（b）和R（b）的频谱。
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公开(公告)号：US08295499B2
公开(公告)日：2012-10-23
申请号：US12823616
申请日：2010-06-25
CPC分类号： G10L19/025
摘要： An audio information processing apparatus and method include dividing an audio signal, determining a time period having a power change ratio of an audio signal larger than a first threshold value as an attack candidate, searching the time period of the attack candidate and a time period immediately before the time period of the attack candidate for an attack starting point, correcting a power of an audio signal included in the time period, and determining whether a power change ratio of the audio signal included in the time period is larger than a second threshold value for attack detection which is larger than the first threshold value.
摘要翻译： 音频信息处理装置和方法包括：分割音频信号，确定具有大于第一阈值的音频信号的功率变化率的时间段作为攻击候选者，在攻击候选者的时间周期和紧急时刻 在攻击起始点的攻击候选者的时间段之前，校正包括在该时间段内的音频信号的功率，以及确定该时间段中包括的音频信号的功率变化率是否大于第二阈值 用于大于第一阈值的攻击检测。
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