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公开(公告)号：US09552824B2
公开(公告)日：2017-01-24
申请号：US15097192
申请日：2016-04-12
IPC分类号： G10L19/00 , G10L19/26 , G10L19/107 , G10L19/20 , G10L19/12 , G10L19/125 , G10L21/003 , G10L19/09 , G10L21/013 , G10L19/22 , G10L21/007 , G10L19/032 , G10L19/02
CPC分类号： G10L19/26 , G10L19/02 , G10L19/0212 , G10L19/032 , G10L19/09 , G10L19/107 , G10L19/12 , G10L19/125 , G10L19/20 , G10L19/22 , G10L19/265 , G10L21/003 , G10L21/007 , G10L21/013
摘要： Disclosed is a method, apparatus and non-transitory computer readable storage medium, which is configured to examine an input audio signal to determine an estimated pitch period associated with a detection criterion, encode the filtered audio signal to generate a compressed audio bit stream, decode the compressed audio bit stream to generate a decoded audio signal and adaptively filtering the decoded audio signal to produce an output audio signal, wherein adaptively filtering the decoded audio signal comprises filtering each of a plurality of segments of the decoded audio signal in a manner that is dependent upon the estimated pitch period associated therewith, and wherein a pitch-based post-filter operates to shape noise components located between harmonics of the input audio signal.
摘要翻译： 公开了一种方法，装置和非暂时计算机可读存储介质，其被配置为检查输入音频信号以确定与检测标准相关联的估计音调周期，对经滤波的音频信号进行编码以产生压缩音频比特流，解码 压缩音频比特流以产生解码的音频信号，并自适应地对解码的音频信号进行滤波以产生输出音频信号，其中自适应地对解码的音频信号进行滤波，包括以解码的音频信号的多个片段中的每一个进行滤波， 取决于与其相关联的估计音调周期，并且其中基于音调的后置滤波器用于对位于输入音频信号的谐波之间的噪声分量进行整形。
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公开(公告)号：US20240153517A1
公开(公告)日：2024-05-09
申请号：US18504879
申请日：2023-11-08
CPC分类号： G10L19/20 , G10L19/008 , G10L19/0212 , G10L19/167 , G10L25/18 , H04S3/008 , H04S2400/03 , H04S2420/03
摘要： A method for decoding an encoded audio bitstream in an audio processing system is disclosed. The method includes extracting from the encoded audio bitstream a first waveform-coded signal comprising spectral coefficients corresponding to frequencies up to a first cross-over frequency for a time frame and performing parametric decoding at a second cross-over frequency for the time frame to generate a reconstructed signal. The second cross-over frequency is above the first cross-over frequency and the parametric decoding uses reconstruction parameters derived from the encoded audio bitstream to generate the reconstructed signal. The method also includes extracting from the encoded audio bitstream a second waveform-coded signal comprising spectral coefficients corresponding to a subset of frequencies above the first cross-over frequency for the time frame and interleaving the second waveform-coded signal with the reconstructed signal to produce an interleaved signal for the time frame.
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公开(公告)号：US11183200B2
公开(公告)日：2021-11-23
申请号：US17073228
申请日：2020-10-16
IPC分类号： G10L19/00 , G10L19/26 , G10L19/20 , G10L19/12 , G10L19/125 , G10L21/003 , G10L19/09 , G10L21/013 , G10L19/22 , G10L21/007 , G10L19/032 , G10L19/02 , G10L19/107
摘要： In some embodiments, a pitch filter for filtering a preliminary audio signal generated from an audio bitstream is disclosed. The pitch filter has an operating mode selected from one of either: (i) an active mode where the preliminary audio signal is filtered using filtering information to obtain a filtered audio signal, and (ii) an inactive mode where the pitch filter is disabled. The preliminary audio signal is generated in an audio encoder or audio decoder having a coding mode selected from at least two distinct coding modes, and the pitch filter is capable of being selectively operated in either the active mode or the inactive mode while operating in the coding mode based on control information.
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公开(公告)号：US09343077B2
公开(公告)日：2016-05-17
申请号：US14936408
申请日：2015-11-09
IPC分类号： G10L19/00 , G10L19/26 , G10L19/12 , G10L19/125 , G10L21/003 , G10L19/02 , G10L19/107 , G10L19/20
CPC分类号： G10L19/26 , G10L19/02 , G10L19/0212 , G10L19/032 , G10L19/09 , G10L19/107 , G10L19/12 , G10L19/125 , G10L19/20 , G10L19/22 , G10L19/265 , G10L21/003 , G10L21/007 , G10L21/013
摘要： In some embodiments, a pitch filter for filtering a preliminary audio signal generated from an audio bitstream is disclosed. The pitch filter has an operating mode selected from one of either: (i) an active mode where the preliminary audio signal is filtered using filtering information to obtain a filtered audio signal, and (ii) an inactive mode where the pitch filter is disabled. The preliminary audio signal is generated in an audio encoder or audio decoder having a coding mode selected from at least two distinct coding modes, and the pitch filter is capable of being selectively operated in either the active mode or the inactive mode while operating in the coding mode based on control information.
摘要翻译： 在一些实施例中，公开了用于滤波从音频比特流产生的初步音频信号的音调滤波器。 音调滤波器具有从以下之一中选择的操作模式：（i）使用滤波信息对初步音频信号进行滤波以获得滤波的音频信号的有源模式，以及（ii）禁用音调滤波器的非活动模式。 在具有从至少两个不同编码模式中选择的编码模式的音频编码器或音频解码器中产生初步音频信号，并且在编码中操作时，音调滤波器能够选择性地在活动模式或非活动模式下操作 模式基于控制信息。
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公开(公告)号：US11610595B2
公开(公告)日：2023-03-21
申请号：US17532775
申请日：2021-11-22
IPC分类号： G10L19/00 , G10L19/26 , G10L19/20 , G10L19/12 , G10L19/125 , G10L21/003 , G10L19/09 , G10L21/013 , G10L19/22 , G10L21/007 , G10L19/032 , G10L19/02 , G10L19/107
摘要： In some embodiments, a pitch filter for filtering a preliminary audio signal generated from an audio bitstream is disclosed. The pitch filter has an operating mode selected from one of either: (i) an active mode where the preliminary audio signal is filtered using filtering information to obtain a filtered audio signal, and (ii) an inactive mode where the pitch filter is disabled. The preliminary audio signal is generated in an audio encoder or audio decoder having a coding mode selected from at least two distinct coding modes, and the pitch filter is capable of being selectively operated in either the active mode or the inactive mode while operating in the coding mode based on control information.
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公开(公告)号：US09558754B2
公开(公告)日：2017-01-31
申请号：US15097201
申请日：2016-04-12
IPC分类号： G10L21/00 , G10L19/26 , G10L19/107 , G10L19/20 , G10L19/12 , G10L19/125 , G10L21/003 , G10L19/09 , G10L21/013 , G10L19/22 , G10L21/007 , G10L19/032 , G10L19/02
CPC分类号： G10L19/26 , G10L19/02 , G10L19/0212 , G10L19/032 , G10L19/09 , G10L19/107 , G10L19/12 , G10L19/125 , G10L19/20 , G10L19/22 , G10L19/265 , G10L21/003 , G10L21/007 , G10L21/013
摘要： In one embodiment, an audio decoder for decoding an encoded audio bitstream is disclosed. The audio decoder is capable of being operated in at least three different decoding modes. The audio decoder includes a demultiplexer for obtaining audio data and control information from the encoded audio bitstream. The audio decoder also includes a first audio decoder configured to operate in a first decoding mode using a first decoding technique and a second audio decoder configured to operate in a second decoding mode using a second decoding technique. The audio decoder also includes a pitch predictor integrated into the second audio decoder. The pitch predictor includes a long-term prediction filter and a short-term prediction filter. The audio decoder further includes a selector for selecting one of the at least three different decoding modes based on at least some of the control information.
摘要翻译： 在一个实施例中，公开了一种用于对编码音频比特流进行解码的音频解码器。 音频解码器能够以至少三种不同的解码模式进行操作。 音频解码器包括用于从编码的音频比特流获得音频数据和控制信息的解复用器。 音频解码器还包括被配置为使用第一解码技术以第一解码模式操作的第一音频解码器和被配置为使用第二解码技术在第二解码模式下操作的第二音频解码器。 音频解码器还包括集成到第二音频解码器中的音调预测器。 音调预测器包括长期预测滤波器和短期预测滤波器。 音频解码器还包括选择器，用于基于至少一些控制信息来选择至少三种不同解码模式之一。
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公开(公告)号：US09396736B2
公开(公告)日：2016-07-19
申请号：US14936393
申请日：2015-11-09
IPC分类号： G10L19/00 , G10L19/26 , G10L19/20 , G10L19/12 , G10L19/125 , G10L21/003 , G10L19/02 , G10L19/107
CPC分类号： G10L19/26 , G10L19/02 , G10L19/0212 , G10L19/032 , G10L19/09 , G10L19/107 , G10L19/12 , G10L19/125 , G10L19/20 , G10L19/22 , G10L19/265 , G10L21/003 , G10L21/007 , G10L21/013
摘要： In one embodiment, an audio decoder for decoding an audio bitstream is disclosed. The decoder includes a first decoding module adapted to operate in a first coding mode and a second decoding module adapted to operate in a second coding mode, the second coding mode being different from the first coding mode. The decoder further includes a pitch filter in either the first coding mode or the second coding mode, the pitch filter adapted to filter a preliminary audio signal generated by the first decoding module or the second decoding module to obtain a filtered signal. The pitch filter is selectively enabled or disabled based on a value of a first parameter encoded in the audio bitstream, the first parameter being distinct from a second parameter encoded in the audio bitstream, the second parameter specifying a current coding mode of the audio decoder.
摘要翻译： 在一个实施例中，公开了一种用于对音频比特流进行解码的音频解码器。 解码器包括适于以第一编码模式操作的第一解码模块和适于以第二编码模式操作的第二解码模块，第二编码模式不同于第一编码模式。 解码器还包括在第一编码模式或第二编码模式中的音调滤波器，音调滤波器适于滤除由第一解码模块或第二解码模块产生的初步音频信号以获得滤波信号。 基于在音频比特流中编码的第一参数的值，音调滤波器被选择性地启用或禁用，第一参数不同于在音频比特流中编码的第二参数，第二参数指定音频解码器的当前编码模式。
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公开(公告)号：US20230274755A1
公开(公告)日：2023-08-31
申请号：US18314865
申请日：2023-05-10
IPC分类号： G10L21/055 , G10L19/022 , H04N21/2368 , H04N21/439 , G10L19/16 , H04N21/43
CPC分类号： G10L21/055 , G10L19/022 , H04N21/2368 , H04N21/4398 , G10L19/167 , H04N21/4302 , G10L19/22
摘要： An audio processing system (100) accepts an audio bitstream having one of a plurality of predefined audio frame rates. The system comprises a front-end component (110), which receives a variable number of quantized spectral components, corresponding to one audio frame in any of the predefined audio frame rates, and performs an inverse quantization according to predetermined, frequency-dependent quantization levels. The front-end component may be agnostic of the audio frame rate. The audio processing system further comprises a frequency-domain processing stage (120) and a sample rate converter (130), which provide a reconstructed audio signal sampled at a target sampling frequency independent of the audio frame rate. By its frame-rate adaptability, the system can be configured to operate frame-synchronously in parallel with a video processing system that accepts plural video frame rates.
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公开(公告)号：US10236010B2
公开(公告)日：2019-03-19
申请号：US15792589
申请日：2017-10-24
IPC分类号： G10L19/00 , G10L19/26 , G10L19/20 , G10L19/12 , G10L19/125 , G10L21/003 , G10L19/09 , G10L21/013 , G10L19/22 , G10L21/007 , G10L19/032 , G10L19/02 , G10L19/107
摘要： In some embodiments, a pitch filter for filtering a preliminary audio signal generated from an audio bitstream is disclosed. The pitch filter has an operating mode selected from one of either: (i) an active mode where the preliminary audio signal is filtered using filtering information to obtain a filtered audio signal, and (ii) an inactive mode where the pitch filter is disabled. The preliminary audio signal is generated in an audio encoder or audio decoder having a coding mode selected from at least two distinct coding modes, and the pitch filter is capable of being selectively operated in either the active mode or the inactive mode while operating in the coding mode based on control information.
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公开(公告)号：US09830923B2
公开(公告)日：2017-11-28
申请号：US14947906
申请日：2015-11-20
IPC分类号： G10L19/00 , G10L19/26 , G10L19/107 , G10L19/20 , G10L19/12 , G10L19/125 , G10L21/003 , G10L19/09 , G10L21/013 , G10L19/22 , G10L21/007 , G10L19/032 , G10L19/02
CPC分类号： G10L19/26 , G10L19/02 , G10L19/0212 , G10L19/032 , G10L19/09 , G10L19/107 , G10L19/12 , G10L19/125 , G10L19/20 , G10L19/22 , G10L19/265 , G10L21/003 , G10L21/007 , G10L21/013
摘要： In some embodiments, a pitch filter for filtering a preliminary audio signal generated from an audio bitstream is disclosed. The pitch filter has an operating mode selected from one of either: (i) an active mode where the preliminary audio signal is filtered using filtering information to obtain a filtered audio signal, and (ii) an inactive mode where the pitch filter is disabled. The preliminary audio signal is generated in an audio encoder or audio decoder having a coding mode selected from at least two distinct coding modes, and the pitch filter is capable of being selectively operated in either the active mode or the inactive mode while operating in the coding mode based on control information.
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