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1. 发明授权

US09583117B2 Method and apparatus for encoding and decoding audio signals 有权
标题翻译：用于对音频信号进行编码和解码的方法和装置
公开(公告)号：US09583117B2
公开(公告)日：2017-02-28
申请号：US11915834
申请日：2007-10-08
申请人： Venkatesh Krishnan , Vivek Rajendran , Ananthapadmanabhan A. Kandhadai
发明人： Venkatesh Krishnan , Vivek Rajendran , Ananthapadmanabhan A. Kandhadai
IPC分类号： G10L19/00 , G10L21/00 , G10L19/12 , G10L21/04 , G10L19/20
CPC分类号： G10L19/20 , G10L19/22
摘要： Techniques for efficiently encoding an input signal are described. In one design, a generalized encoder encodes the input signal (e.g., an audio signal) based on at least one detector and multiple encoders. The at least one detector may include a signal activity detector, a noise-like signal detector, a sparseness detector, some other detector, or a combination thereof. The multiple encoders may include a silence encoder, a noise-like signal encoder, a time-domain encoder, a transform-domain encoder, some other encoder, or a combination thereof. The characteristics of the input signal may be determined based on the at least one detector. An encoder may be selected from among the multiple encoders based on the characteristics of the input signal. The input signal may be encoded based on the selected encoder. The input signal may include a sequence of frames, and detection and encoding may be performed for each frame.
摘要翻译：描述用于有效地编码输入信号的技术。在一种设计中，广义编码器基于至少一个检测器和多个编码器对输入信号（例如，音频信号）进行编码。所述至少一个检测器可以包括信号活动检测器，类噪声信号检测器，稀疏检测器，一些其它检测器或其组合。多个编码器可以包括静音编码器，噪声状信号编码器，时域编码器，变换域编码器，一些其它编码器或其组合。可以基于至少一个检测器来确定输入信号的特性。可以基于输入信号的特性从多个编码器中选择编码器。可以基于所选择的编码器对输入信号进行编码。输入信号可以包括一系列帧，并且可以针对每个帧执行检测和编码。

2. 发明申请

US20090187409A1 METHOD AND APPARATUS FOR ENCODING AND DECODING AUDIO SIGNALS 有权
标题翻译：编码和解码音频信号的方法和装置
公开(公告)号：US20090187409A1
公开(公告)日：2009-07-23
申请号：US11915834
申请日：2007-10-08
申请人： Venkatesh Krishnan , Vivek Rajendran , Ananthapadmanabhan A. Kandhadai
发明人： Venkatesh Krishnan , Vivek Rajendran , Ananthapadmanabhan A. Kandhadai
IPC分类号： G10L13/00 , G10L19/00 , H04M1/00
CPC分类号： G10L19/20 , G10L19/22
摘要： Techniques for efficiently encoding an input signal are described. In one design, a generalized encoder encodes the input signal (e.g., an audio signal) based on at least one detector and multiple encoders. The at least one detector may include a signal activity detector, a noise-like signal detector, a sparseness detector, some other detector, or a combination thereof. The multiple encoders may include a silence encoder, a noise-like signal encoder, a time-domain encoder, a transform-domain encoder, some other encoder, or a combination thereof. The characteristics of the input signal may be determined based on the at least one detector. An encoder may be selected from among the multiple encoders based on the characteristics of the input signal. The input signal may be encoded based on the selected encoder. The input signal may include a sequence of frames, and detection and encoding may be performed for each frame.
摘要翻译：描述用于有效地编码输入信号的技术。在一种设计中，广义编码器基于至少一个检测器和多个编码器对输入信号（例如，音频信号）进行编码。所述至少一个检测器可以包括信号活动检测器，类噪声信号检测器，稀疏检测器，一些其它检测器或其组合。多个编码器可以包括静音编码器，噪声状信号编码器，时域编码器，变换域编码器，一些其它编码器或其组合。可以基于至少一个检测器来确定输入信号的特性。可以基于输入信号的特性从多个编码器中选择编码器。可以基于所选择的编码器对输入信号进行编码。输入信号可以包括一系列帧，并且可以针对每个帧执行检测和编码。

3. 发明授权

US09653088B2 Systems, methods, and apparatus for signal encoding using pitch-regularizing and non-pitch-regularizing coding 有权
公开(公告)号：US09653088B2
公开(公告)日：2017-05-16
申请号：US12137700
申请日：2008-06-12
申请人： Vivek Rajendran , Ananthapadmanabhan A. Kandhadai , Venkatesh Krishnan
发明人： Vivek Rajendran , Ananthapadmanabhan A. Kandhadai , Venkatesh Krishnan
IPC分类号： G10L19/18 , G10L19/022 , G10L19/08
CPC分类号： G10L19/18 , G10L19/022 , G10L19/08
摘要： A time shift calculated during a pitch-regularizing (PR) encoding of a frame of an audio signal is used to time-shift a segment of another frame during a non-PR encoding.

4. 发明申请

US20080027718A1 SYSTEMS, METHODS, AND APPARATUS FOR GAIN FACTOR LIMITING 有权
标题翻译：系统，方法和设备增益因子限制
公开(公告)号：US20080027718A1
公开(公告)日：2008-01-31
申请号：US11610104
申请日：2006-12-13
申请人： Venkatesh Krishnan , Ananthapadmanabhan A. Kandhadai
发明人： Venkatesh Krishnan , Ananthapadmanabhan A. Kandhadai
IPC分类号： G10L19/14
CPC分类号： G10L21/038 , G10L19/0204 , G10L25/18
摘要： The range of disclosed configurations includes methods in which subbands of a speech signal are separately encoded, with the excitation of a first subband being derived from a second subband. Gain factors are calculated to indicate a time-varying relation between envelopes of the original first subband and of the synthesized first subband. The gain factors are quantized, and quantized values that exceed the pre-quantized values are re-coded.
摘要翻译：所公开的配置的范围包括其中语音信号的子带被分开编码的方法，第一子带的激励是从第二子带导出的。计算增益因子以指示原始第一子带和合成的第一子带的包络之间的时变关系。对增益因子进行量化，并重新编码超过预量化值的量化值。

5. 发明授权

US09454974B2 Systems, methods, and apparatus for gain factor limiting 有权
标题翻译：用于增益因子限制的系统，方法和装置
公开(公告)号：US09454974B2
公开(公告)日：2016-09-27
申请号：US11610104
申请日：2006-12-13
申请人： Venkatesh Krishnan , Ananthapadmanabhan A. Kandhadai
发明人： Venkatesh Krishnan , Ananthapadmanabhan A. Kandhadai
IPC分类号： G10L19/14 , G10L21/038 , G10L19/02 , G10L25/18
CPC分类号： G10L21/038 , G10L19/0204 , G10L25/18
摘要： The range of disclosed configurations includes methods in which subbands of a speech signal are separately encoded, with the excitation of a first subband being derived from a second subband. Gain factors are calculated to indicate a time-varying relation between envelopes of the original first subband and of the synthesized first subband. The gain factors are quantized, and quantized values that exceed the pre-quantized values are re-coded.
摘要翻译：所公开的配置的范围包括其中语音信号的子带被分开编码的方法，第一子带的激励是从第二子带导出的。计算增益因子以指示原始第一子带和合成的第一子带的包络之间的时变关系。对增益因子进行量化，并重新编码超过预量化值的量化值。

6. 发明授权

US07987089B2 Systems and methods for modifying a zero pad region of a windowed frame of an audio signal 有权
标题翻译：用于修改音频信号的窗口化帧的零焊盘区域的系统和方法
公开(公告)号：US07987089B2
公开(公告)日：2011-07-26
申请号：US11674745
申请日：2007-02-14
申请人： Venkatesh Krishnan , Ananthapadmanabhan A. Kandhadai
发明人： Venkatesh Krishnan , Ananthapadmanabhan A. Kandhadai
IPC分类号： G10L11/06
CPC分类号： G10L19/20 , G10L19/0212
摘要： A method for modifying a window with a frame associated with an audio signal is described. A signal is received. The signal is partitioned into a plurality of frames. A determination is made if a frame within the plurality of frames is associated with a non-speech signal. A modified discrete cosine transform (MDCT) window function is applied to the frame to generate a first zero pad region, where the region has a length of (M−L)/2, where L is an arbitrary value, and a second zero pad region if it was determined that the frame is associated with a non-speech signal. The frame is encoded. The decoder window is the same as the encoder window.
摘要翻译：描述了用与音频信号相关联的帧修改窗口的方法。接收到一个信号。信号被分割成多个帧。确定多个帧内的帧与非语音信号相关联。修改的离散余弦变换（MDCT）窗函数被应用于帧以产生第一零焊盘区域，其中区域具有长度（M-L）/ 2，其中L是任意值，第二零焊盘如果确定帧与非语音信号相关联。帧被编码。解码器窗口与编码器窗口相同。

7. 发明授权

US09208792B2 Systems, methods, apparatus, and computer-readable media for noise injection 有权
标题翻译：用于噪声注入的系统，方法，装置和计算机可读介质
公开(公告)号：US09208792B2
公开(公告)日：2015-12-08
申请号：US13211027
申请日：2011-08-16
申请人： Vivek Rajendran , Ethan Robert Duni , Venkatesh Krishnan
发明人： Vivek Rajendran , Ethan Robert Duni , Venkatesh Krishnan
IPC分类号： G10L21/00 , G10L25/90 , G10L21/02 , G10L19/028
CPC分类号： G10L19/028
摘要： A method of processing an audio signal is described. The method includes selecting one among a plurality of entries of a codebook based on information from the audio signal. The method also includes determining locations, in a frequency domain, of zero-valued elements of a first signal that is based on the selected codebook entry. The method further includes calculating energy of the audio signal at the determined frequency-domain locations. The method additionally includes calculating a value of a measure of a distribution of the energy of the audio signal among the determined frequency-domain locations. The method also includes calculating a noise injection gain factor based on the calculated energy and the calculated value.
摘要翻译：描述了一种处理音频信号的方法。该方法包括基于来自音频信号的信息来选择码本的多个条目之一。该方法还包括在频域中确定基于所选码本条目的第一信号的零值元素的位置。该方法还包括在确定的频域位置处计算音频信号的能量。该方法还包括计算所确定的频域位置之间的音频信号的能量分布的度量的值。该方法还包括基于计算的能量和计算值来计算噪声注入增益因子。

8. 发明申请

US20120046955A1 SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR NOISE INJECTION 有权
标题翻译：用于噪声注射的系统，方法，装置和计算机可读介质
公开(公告)号：US20120046955A1
公开(公告)日：2012-02-23
申请号：US13211027
申请日：2011-08-16
申请人： Vivek Rajendran , Ethan Robert Duni , Venkatesh Krishnan
发明人： Vivek Rajendran , Ethan Robert Duni , Venkatesh Krishnan
IPC分类号： G10L19/00
CPC分类号： G10L19/028
摘要： A scheme for injecting noise at uncoded elements of a spectrum is controlled according to a measure of a distribution of energy of the original spectrum among the locations of the uncoded elements.
摘要翻译：根据未编码元件的位置之间的原始光谱能量分布的测量来控制用于在光谱的未编码元件中注入噪声的方案。

9. 发明授权

US09236063B2 Systems, methods, apparatus, and computer-readable media for dynamic bit allocation 有权
标题翻译：用于动态位分配的系统，方法，设备和计算机可读介质
公开(公告)号：US09236063B2
公开(公告)日：2016-01-12
申请号：US13193529
申请日：2011-07-28
申请人： Ethan Robert Duni , Venkatesh Krishnan , Vivek Rajendran
发明人： Ethan Robert Duni , Venkatesh Krishnan , Vivek Rajendran
IPC分类号： G10L25/90 , G10L19/038 , G10L19/093
CPC分类号： G10L25/90 , G10L19/038 , G10L19/093
摘要： A method of bit allocation is described. The method includes, for each among a plurality of vectors, calculating a corresponding one of a plurality of gain factors. The method also includes, for each among the plurality of vectors, calculating a corresponding bit allocation that is based on the gain factor. The method further includes, for at least one among the plurality of vectors, determining that the corresponding bit allocation is not greater than a minimum allocation value. The method additionally includes, in response to the determining, for each of the at least one vector, changing the corresponding bit allocation.
摘要翻译：描述了一种比特分配的方法。对于多个向量中的每一个，该方法包括计算多个增益因子中的相应一个。对于多个向量中的每一个，该方法还包括基于增益因子来计算相应的比特分配。该方法还包括对于多个向量中的至少一个，确定相应的比特分配不大于最小分配值。该方法还响应于确定对于至少一个向量中的每一个，改变相应的比特分配。

10. 发明申请

US20120029925A1 SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR DYNAMIC BIT ALLOCATION 有权
标题翻译：用于动态位分配的系统，方法，装置和计算机可读介质
公开(公告)号：US20120029925A1
公开(公告)日：2012-02-02
申请号：US13193529
申请日：2011-07-28
申请人： Ethan Robert Duni , Venkatesh Krishnan , Vivek Rajendran
发明人： Ethan Robert Duni , Venkatesh Krishnan , Vivek Rajendran
IPC分类号： G10L19/00
CPC分类号： G10L25/90 , G10L19/038 , G10L19/093
摘要： A dynamic bit allocation operation determines a bit allocation for each of a plurality of vectors, based on a corresponding plurality of gain factors, and compares each allocation to a threshold value that is based on a dimensionality of the vector.
摘要翻译：动态位分配操作基于相应的多个增益因子确定多个向量中的每一个的位分配，并且将每个分配与基于向量的维度的阈值进行比较。

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