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31. 发明授权

US08676365B2 Pre-echo attenuation in a digital audio signal 有权
标题翻译：数字音频信号中的前回波衰减
公开(公告)号：US08676365B2
公开(公告)日：2014-03-18
申请号：US13063002
申请日：2009-09-15
申请人： Balazs Kovesi , Stéphane Ragot
发明人： Balazs Kovesi , Stéphane Ragot
IPC分类号： G06F17/00
CPC分类号： G10L19/26 , G10L19/0212 , G10L19/025
摘要： A method is provided for attenuating pre-echoes in a digital audio signal generated from a transform encoding, comprising, upon decoding and for a current frame of said digital audio signal: defining a concatenated signal from at least the reconstructed signal of the current frame, dividing said concatenated signal into subunits of samples having a predetermined length, calculating the time envelope of the concatenated signal, detecting the transition of the time envelope towards a high-energy area, determining the low-energy sub-units preceding a subunit in which a transition has been detected, and an attenuation step in said determined subunits. The attenuation is carried out according to an attenuation factor calculated for each of the determined subunits, based on the time envelope of the concatenated signal. The invention also relates to a device for implementing said method, and to a decoder including such a device.
摘要翻译：提供了一种用于衰减从变换编码产生的数字音频信号中的预回波的方法，包括在解码和所述数字音频信号的当前帧时：从至少当前帧的重建信号定义级联信号，将所述级联信号划分成具有预定长度的样本的子单元，计算所述级联信号的时间包络，检测所述时间包络朝向高能区域的转变，确定子单元之前的低能量子单元，其中，已经检测到转换，并且在所述确定的子单元中的衰减步骤。根据对于每个确定的子单元计算的衰减因子，根据级联信号的时间包络来执行衰减。本发明还涉及一种用于实现所述方法的装置，以及包括这种装置的解码器。

32. 发明授权

US08577687B2 Hierarchical coding of digital audio signals 有权
标题翻译：数字音频信号的分层编码
公开(公告)号：US08577687B2
公开(公告)日：2013-11-05
申请号：US12667724
申请日：2008-07-04
申请人： Balazs Kovesi , Stéphane Ragot
发明人： Balazs Kovesi , Stéphane Ragot
IPC分类号： G10L19/00
CPC分类号： G10L19/24
摘要： The invention relates to a method for scalar quantization-based coding of the samples of a digital audio signal (S), the samples being coded over a pre-determined number of bits in order to obtain a binary frame of quantization indices (IPCM), the coding being carried out according to an amplitude compression law, where a pre-determined number of least significant bits are not taken into account in the binary frame of quantization indices. The coding method comprises the steps for storing (27) at least a part of the least significant bits that are not taken into account in the quantization index binary frame and for determination (28) of an enhancement bit stream (IEXT) comprising at least one bit thus stored.The invention also relates to an associated decoding method which comprises the steps for receiving (29) an enhancement bit stream (I′EXT) comprising one or more extension bits and for concatenation (30) of the extension bits behind the bits coming from the binary frame in order to obtain a decoded audio signal.The invention also relates to the coder and decoder implementing these methods.
摘要翻译：本发明涉及一种用于对数字音频信号（S）的采样进行标量量化编码的方法，该样本是通过预定位数进行编码的，以便获得量化指数（IPCM）的二进制帧，根据幅度压缩规律执行编码，其中在量化索引的二进制帧中不考虑预定数量的最低有效位。编码方法包括以下步骤：在量化索引二进制帧中存储（27）至少一部分不被考虑的最低有效位，并且用于确定包括至少一个的增强位流（IEXT）这样存储。本发明还涉及一种相关联的解码方法，其包括以下步骤：接收（29）包含一个或多个扩展比特的增强比特流（I'EXT），并用于从二进制位的比特之后的扩展比特的连接（30）以获得解码的音频信号。本发明还涉及实现这些方法的编码器和解码器。

33. 发明授权

US08571856B2 Limitation of distortion introduced by a post-processing step during digital signal decoding 有权
标题翻译：在数字信号解码期间通过后处理步骤引入的失真限制
公开(公告)号：US08571856B2
公开(公告)日：2013-10-29
申请号：US12667908
申请日：2008-07-04
申请人： Balazs Kovesi , Stéphane Ragot
发明人： Balazs Kovesi , Stéphane Ragot
IPC分类号： G10L21/00
CPC分类号： G10L19/26 , G10L21/02
摘要： The invention relates to the processing of a digital signal originating from a decoder and a noise reduction post-processing step, including, in particular, limitation of distortion introduced by the post-processing step in order to deliver a corrected output signal (SOUT), assigning said corrected output signal (SOUT) with: a current amplitude having an intermediary value between a current amplitude value of the post-processed signal (SPOST) and a corresponding current amplitude value of the decoded signal (S′MIC), or the current amplitude of the post-processed signal (SPOST), according to the respective values of the current amplitude of the post-processed signal (SPOST) and by the corresponding current amplitude of the decoded signal (S′MIC).
摘要翻译：本发明涉及从解码器产生的数字信号的处理和降噪后处理步骤，特别地，包括通过后处理步骤引入的失真的限制，以便递送校正的输出信号（SOUT），通过以下方式分配所述校正输出信号（SOUT）：具有后处理信号（SPOST）的当前振幅值与解码信号（S'MIC）的相应电流振幅值之间的中间值的电流幅度或电流根据后处理信号（SPOST）的当前幅度的相应值和解码信号（S'MIC）的对应电流幅度，后处理信号（SPOST）的振幅。

34. 发明授权

US08418032B2 Processing of bit errors in a digital audio bit frame 有权
标题翻译：处理数字音频位帧中的位错误
公开(公告)号：US08418032B2
公开(公告)日：2013-04-09
申请号：US12744993
申请日：2008-12-10
申请人： Balazs Kovesi , Stéphane Ragot
发明人： Balazs Kovesi , Stéphane Ragot
IPC分类号： H03M13/00
CPC分类号： H03M13/451 , H03M13/09 , H03M13/356 , H03M13/6312
摘要： The invention relates to a method of processing bit errors in a bit frame emanating from a digital audio coder, comprising a step of receiving a current bit frame liable to comprise bit errors. According to the invention, the bit frame comprises sensitive bits to be protected which are catalogued in at least one category according to the type of parameter that they code and the method furthermore comprises the steps of receiving protection bits, of reading the sensitive bits received in the current bit frame, the number of sensitive bits being lower than the number of bits of the bit frame, of detecting bit errors as a function of said protection bits received and of said sensitive bits received and in the event of detecting at least one erroneous bit in said bit frame, of modifying the current bit frame before decoding, as a function of the category in which the erroneous bit is catalogued. The invention also pertains to a device implementing the method according to the invention as well as to a decoder and a coding/decoding system comprising such a device.
摘要翻译：本发明涉及一种处理从数字音频编码器发出的比特帧中的比特错误的方法，包括接收当前比特帧容易包含比特错误的步骤。根据本发明，位帧包括要被保护的敏感位，其根据它们编码的参数的类型在至少一个类别中编目，并且该方法还包括以下步骤：接收保护位，读取接收到的敏感位当前位帧，敏感位的数量低于位帧的位数，检测位误差作为接收的所述保护位和所接收的所述敏感位的函数，并且在检测至少一个错误的位置的情况下在所述比特帧中，根据编码错误位的类别的函数来修改解码之前的当前比特帧。本发明还涉及实现根据本发明的方法的装置以及包括这种装置的解码器和编码/解码系统。

35. 发明授权

US08260620B2 Device for perceptual weighting in audio encoding/decoding 有权
标题翻译：音频编码/解码中感知加权的设备
公开(公告)号：US08260620B2
公开(公告)日：2012-09-04
申请号：US12279493
申请日：2007-02-07
申请人： Stéphane Ragot , Romain Trilling
发明人： Stéphane Ragot , Romain Trilling
IPC分类号： G10L19/00 , G10L19/14
CPC分类号： G10L19/24 , G10L19/0208
摘要： A hierarchical audio coder for use in a frequency band divided into adjacent first and second sub-bands, the coder including: a core coder (305) for coding an original signal in the first sub-band of the frequency band; a stage (306) for calculating a residual signal (e) from the original signal and the signal from the core coder; a device (307) for perceptually weighting the residual signal (e). The perceptual weighting device includes a perceptually weighted filter (307) with gain compensation adapted to realize spectral continuity between the output signal of the perceptually weighted filter with gain compensation and the signal in the second sub-band. Application to transmitting and storing digital signals, such as audio-frequency speech, music, etc. signals.
摘要翻译：一种分级音频编码器，用于分成相邻的第一和第二子频带的频带中，编码器包括：用于对频带的第一子带中的原始信号进行编码的核心编码器（305）用于从原始信号和来自核心编码器的信号计算残余信号（e）的级（306）; 用于感知地加权残余信号（e）的装置（307）。感知加权装置包括具有增益补偿的感知加权滤波器（307），其适于实现具有增益补偿的感知加权滤波器的输出信号与第二子带中的信号之间的频谱连续性。应用于数字信号的发送和存储，如音频语音，音乐等信号。

36. 发明申请

US20100306629A1 PROCESSING OF BIT ERRORS IN A DIGITAL AUDIO BIT FRAME 有权
标题翻译：在数字音频帧框中处理位错误
公开(公告)号：US20100306629A1
公开(公告)日：2010-12-02
申请号：US12744993
申请日：2008-12-10
申请人： Balazs Kovesi , Stéphane Ragot
发明人： Balazs Kovesi , Stéphane Ragot
IPC分类号： H03M13/09 , G06F11/10
CPC分类号： H03M13/451 , H03M13/09 , H03M13/356 , H03M13/6312
摘要： The invention relates to a method of processing bit errors in a bit frame emanating from a digital audio coder, comprising a step of receiving a current bit frame liable to comprise bit errors. According to the invention, the bit frame comprises sensitive bits to be protected which are catalogued in at least one category according to the type of parameter that they code and the method furthermore comprises the steps of receiving protection bits, of reading the sensitive bits received in the current bit frame, the number of sensitive bits being lower than the number of bits of the bit frame, of detecting bit errors as a function of said protection bits received and of said sensitive bits received and in the event of detecting at least one erroneous bit in said bit frame, of modifying the current bit frame before decoding, as a function of the category in which the erroneous bit is catalogued. The invention also pertains to a device implementing the method according to the invention as well as to a decoder and a coding/decoding system comprising such a device.
摘要翻译：本发明涉及一种处理从数字音频编码器发出的比特帧中的比特错误的方法，包括接收当前比特帧容易包含比特错误的步骤。根据本发明，位帧包括要被保护的敏感位，其根据它们编码的参数的类型在至少一个类别中编目，并且该方法还包括以下步骤：接收保护位，读取接收到的敏感位当前位帧，敏感位的数量低于位帧的位数，检测位误差作为接收的所述保护位和所接收的所述敏感位的函数，并且在检测至少一个错误的位置的情况下在所述比特帧中，根据编码错误位的类别的函数来修改解码之前的当前比特帧。本发明还涉及实现根据本发明的方法的设备以及包括这样的设备的解码器和编码/解码系统。

37. 发明申请

US20100121646A1 CODING/DECODING OF DIGITAL AUDIO SIGNALS 有权
标题翻译：数字音频信号的编码/解码
公开(公告)号：US20100121646A1
公开(公告)日：2010-05-13
申请号：US12524774
申请日：2008-01-30
申请人： Stéphane Ragot , Cyril Gukllaume
发明人： Stéphane Ragot , Cyril Gukllaume
IPC分类号： G10L19/02
CPC分类号： G10L19/0204 , G10L19/002 , G10L19/0212 , G10L19/038 , G10L19/24
摘要： The invention relates to the coding/decoding of a signal into several sub-bands, in which at least a first and a second sub-bands which are adjacent are transform coded (601, 602). In particular, in order to apply a perceptual weighting, in the transformed domain, to at least the second sub-band, the method comprises:—determining at least one frequency masking threshold (606) to be applied on the second sub-band; and normalizing said masking threshold in order to provide a spectral continuity between the above-mentioned first and second sub-bands. An advantageous application of the invention involves a perceptual weighting of the high-frequency band in the TDAC transform coding of a hierarchical encoder according to standard G.729.1.
摘要翻译：本发明涉及将信号编码/解码成几个子带，其中相邻的至少第一和第二子带被变换编码（601,602）。具体地，为了将变换后的域中的感知加权应用到至少第二子带，该方法包括： - 确定要应用于第二子带的至少一个频率屏蔽阈值（606）; 以及归一化所述屏蔽阈值，以便提供上述第一和第二子带之间的频谱连续性。本发明的有利应用涉及根据标准G.729.1的分级编码器的TDAC变换编码中的高频带的感知加权。

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