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1. 发明申请

WO2022216542A1 MULTI-BAND DUCKING OF AUDIO SIGNALS TECHNICAL FIELD 审中-公开
公开(公告)号：WO2022216542A1
公开(公告)日：2022-10-13
申请号：PCT/US2022/023057
申请日：2022-04-01
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： TYAGI, Rishabh , PURNHAGEN, Heiko
IPC分类号： G10L19/008
摘要： A method for multi-band ducking of audio signals is provided. In some implementations, the method involves receiving, at a decoder, an input audio signal, wherein the input audio signal is a downmixed audio signal. In some implementations, the method involves separating the input audio signal into a first set of frequency bands. In some implementations, the method involves determining a set of ducking gains, a ducking gain corresponding to a frequency band of the first set of frequency bands. In some implementations, the method involves generating a broadband decorrelated audio signal, wherein ducking gains of the set of ducking gains are applied to at least one of: 1) a second set of frequency bands prior to generating the at least one broadband decorrelated audio signal; or 2) a third set of frequency bands that separates the at least one broadband decorrelated audio signal.

2. 发明申请

WO2020089302A1 AN AUDIO ENCODER AND AN AUDIO DECODER 审中-公开
公开(公告)号：WO2020089302A1
公开(公告)日：2020-05-07
申请号：PCT/EP2019/079683
申请日：2019-10-30
申请人： DOLBY INTERNATIONAL AB
发明人： FRIEDRICH, Tobias , PURNHAGEN, Heiko , GORLOW, Stanislaw , MERPILLAT, Celine
IPC分类号： G10L19/008 , G10L19/18
摘要： The present disclosure relates to the field audio coding, an in particular to an audio decoder having at least two decoding modes, and associated decoding methods and decoding software for such audio decoder. In one of the decoding modes, at least one dynamic audio object is mapped to a set of static audio objects, the set of static audio objects corresponding to a predefined speaker configuration. The present disclosure further relates to a corresponding audio encoder, and associated encoding methods and encoding software for such audio encoder.

3. 发明申请

WO2019148112A1 BACKWARD-COMPATIBLE INTEGRATION OF HIGH FREQUENCY RECONSTRUCTION TECHNIQUES FOR AUDIO SIGNALS 审中-公开
公开(公告)号：WO2019148112A1
公开(公告)日：2019-08-01
申请号：PCT/US2019/015442
申请日：2019-01-28
申请人： DOLBY INTERNATIONAL AB
发明人： KJOERLING, Kristofer , VILLEMOES, Lars , PURNHAGEN, Heiko , EKSTRAND, Per
IPC分类号： G10L19/02 , G10L19/00 , G10L19/16 , H04N19/00
摘要： A method for decoding an encoded audio bitstream is disclosed. The method includes receiving the encoded audio bitstream and decoding the audio data to generate a decoded lowband audio signal. The method further includes extracting high frequency reconstruction metadata and filtering the decoded lowband audio signal with an analysis filterbank to generate a filtered lowband audio signal. The method also includes extracting a flag indicating whether either spectral translation or harmonic transposition is to be performed on the audio data and regenerating a highband portion of the audio signal using the filtered lowband audio signal and the high frequency reconstruction metadata in accordance with the flag.

4. 发明申请

WO2018175347A1 BACKWARD-COMPATIBLE INTEGRATION OF HARMONIC TRANSPOSER FOR HIGH FREQUENCY RECONSTRUCTION OF AUDIO SIGNALS 审中-公开
公开(公告)号：WO2018175347A1
公开(公告)日：2018-09-27
申请号：PCT/US2018/023183
申请日：2018-03-19
申请人： DOLBY INTERNATIONAL AB , DOLBY LABORATORIES LICENSING CORPORATION
发明人： VILLEMOES, Lars , PURNHAGEN, Heiko , EKSTRAND, Per
IPC分类号： G06F17/10 , G10L19/02 , G10L19/22 , G10L19/24 , G10L19/26
摘要： A method for decoding an encoded audio bitstream is disclosed. The method includes receiving the encoded audio bitstream and decoding the audio data to generate a decoded lowband audio signal. The method further includes extracting high frequency reconstruction metadata and filtering the decoded lowband audio signal with an analysis filterbank to generate a filtered lowband audio signal. The method also includes extracting a flag indicating whether either spectral translation or harmonic transposition is to be performed on the audio data and regenerating a highband portion of the audio signal using the filtered lowband audio signal and the high frequency reconstruction metadata in accordance with the flag.

5. 发明申请

WO2016062869A1 ENCODING AND DECODING OF AUDIO SIGNALS 审中-公开
标题翻译：音频信号的编码和解码
公开(公告)号：WO2016062869A1
公开(公告)日：2016-04-28
申请号：PCT/EP2015/074623
申请日：2015-10-23
申请人： DOLBY INTERNATIONAL AB
发明人： KJOERLING, Kristofer , GROESCHEL, Alexander , PURNHAGEN, Heiko , HOERICH, Holger , KRAUSS, Kurt
IPC分类号： G10L19/16 , G10L19/022
CPC分类号： G10L19/173 , G10L19/022 , G10L19/167 , H04N21/2335 , H04N21/23418
摘要： An audio signal (X) is represented by a bitstream (B) segmented into frames. An audio processing system (500) comprises a buffer (510) and a decoding section (520). The buffer joins sets of audio data (D 1 ; D 2 ,..., D N ) carried by N respective frames (F 1 , F 2 ,..., F N ) into one decodable set of audio data (D) corresponding to a first frame rate and to a first number of samples of the audio signal per frame. The frames have a second frame rate corresponding to a second number of samples of the audio signal per frame. The first number of samples is N times the second number of samples. The decoding section decodes the decodable set of audio data into a segment of the audio signal by at least employing signal synthesis, based on the decodable set of audio data, with a stride corresponding to the first number of samples of the audio signal.
摘要翻译：音频信号（X）由分割成帧的比特流（B）表示。音频处理系统（500）包括缓冲器（510）和解码部分（520）。缓冲器将由N个相应帧（F1，F2，...，FN）携带的音频数据集合（D1; D2，...，DN）连接成对应于第一帧速率的一个可解码的音频数据集合（D）以及每帧的音频信号的第一数量的样本。帧具有对应于每帧的音频信号的第二数量样本的第二帧速率。样本的第一个数量是第二个样本数量的N倍。解码部分通过至少采用基于可解码的音频数据集合的信号合成，将音频数据的可解码集合解码为音频信号的片段，其中步幅对应于音频信号的第一数量的样本。

6. 发明申请

WO2015150384A1 EFFICIENT CODING OF AUDIO SCENES COMPRISING AUDIO OBJECTS 审中-公开
标题翻译：包含音频对象的音频场景的有效编码
公开(公告)号：WO2015150384A1
公开(公告)日：2015-10-08
申请号：PCT/EP2015/057026
申请日：2015-03-31
申请人： DOLBY INTERNATIONAL AB
发明人： PURNHAGEN, Heiko , KLEJSA, Janusz
IPC分类号： G10L19/008
CPC分类号： H04S7/302 , G10L19/008 , H04S3/008 , H04S2400/01 , H04S2400/03 , H04S2400/11
摘要： There is provided encoding and decoding methods for encoding and decoding of object based audio. An exemplary decoding method described is for reconstructing audio objects based on a data stream, wherein the data stream corresponds to a plurality of time frames, wherein the data stream comprises a plurality of side information instances, wherein the data stream further comprises, for each side information instance, transition data including two independently assignable portions which in combination define a point in time to begin a transition from a current reconstruction setting to a desired reconstruction setting specified by the side information instance, and a point in time to complete the transition.
摘要翻译：提供了用于基于对象的音频的编码和解码的编码和解码方法。所描述的示例性解码方法是用于基于数据流重建音频对象，其中数据流对应于多个时间帧，其中数据流包括多个副信息实例，其中数据流还包括每一侧信息实例，包括两个可独立分配的部分的转换数据，这两个可独立分配的部分组合定义开始从当前重建设置到由侧面信息实例指定的期望重建设置的转变的时间点，以及完成转换的时间点。

7. 发明申请

WO2015036352A1 CODING OF MULTICHANNEL AUDIO CONTENT 审中-公开
标题翻译：多通道音频内容的编码
公开(公告)号：WO2015036352A1
公开(公告)日：2015-03-19
申请号：PCT/EP2014/069044
申请日：2014-09-08
申请人： DOLBY INTERNATIONAL AB
发明人： PURNHAGEN, Heiko , MUNDT, Harald , KJOERLING, Kristofer
IPC分类号： G10L19/008
CPC分类号： G10L19/008 , G10L19/02 , G10L19/24 , H04S5/00 , H04S2400/03 , H04S2420/03
摘要： There are provided decoding and encoding methods for encoding and decoding of multichannel audio content for playback on a speaker configuration with N channels. The decoding method comprises decoding, in a first decoding module, M input audio signals into M mid signals which are suitable for playback on a speaker configuration with M channels; and for each of the N channels in excess of M channels, receiving an additional input audio signal corresponding to one of the M mid signals and decoding the input audio signal and its corresponding mid signal so as to generate a stereo signal including a first and a second audio signal which are suitable for playback on two of the N channels of the speaker configuration.
摘要翻译：提供了用于在具有N个通道的扬声器配置上播放的多声道音频内容的编码和解码的解码和编码方法。解码方法包括在第一解码模块中将M个输入音频信号解码为适合于在具有M个声道的扬声器配置上重放的M个mid信号; 并且对于超过M个通道的N个通道中的每一个，接收对应于M个中间信号之一的附加输入音频信号，并解码输入音频信号及其对应的中间信号，以便产生包括第一和第二信号的立体声信号第二音频信号适于在扬声器配置的N个通道中的两个上播放。

8. 发明申请

WO2015036350A1 AUDIO DECODING SYSTEM AND AUDIO ENCODING SYSTEM 审中-公开
标题翻译：音频解码系统和音频编码系统
公开(公告)号：WO2015036350A1
公开(公告)日：2015-03-19
申请号：PCT/EP2014/069041
申请日：2014-09-08
申请人： DOLBY INTERNATIONAL AB
发明人： VILLEMOES, Lars , SAMUELSSON, Leif Jonas , KJOERLING, Kristofer , PURNHAGEN, Heiko , SEHLSTROM, Leif
IPC分类号： G10L19/008
CPC分类号： G10L19/008
摘要： An audio decoding system (100) for processing a two-channel input signal (X) comprises a parametric mixing stage (110). The parametric mixing stage receives the two-channel input signal and a set of mixing parameters (P1), and outputs a two-channel output signal (Y1). The parametric mixing stage comprises a decorrelation stage (111) outputting a decorrelated signal (D1) based on the input signal. The parametric mixing stage further comprises a mixing matrix (112) receiving the input signal and the decorrelated signal, and forming a two-channel linear combination of channels from the input signal and the decorrelated signal. The mixing matrix outputs the linear combination as the two-channel output signal. Coefficients of the linear combination are controllable by the set of mixing parameters, and at least four mixing parameters of the set are independently assignable. In example embodiments, multiple parametric mixing stages are used to independently reconstruct additional channels encoded in the input signal.
摘要翻译：用于处理双通道输入信号（X）的音频解码系统（100）包括参数混合级（110）。参数混合级接收双通道输入信号和一组混合参数（P1），并输出双通道输出信号（Y1）。参数混合级包括基于输入信号输出解相关信号（D1）的去相关级（111）。参数混合阶段还包括接收输入信号和解相关信号的混合矩阵（112），以及从输入信号和解相关信号形成信道的双通道线性组合。混合矩阵输出线性组合作为双通道输出信号。线性组合的系数可以通过混合参数的集合来控制，并且该组的至少四个混合参数是独立可分配的。在示例实施例中，使用多个参数混合级来独立地重建在输入信号中编码的附加通道。

9. 发明申请

WO2015036349A1 NON-UNIFORM PARAMETER QUANTIZATION FOR ADVANCED COUPLING 审中-公开
标题翻译：用于高级耦合的非均匀参数量化
公开(公告)号：WO2015036349A1
公开(公告)日：2015-03-19
申请号：PCT/EP2014/069040
申请日：2014-09-08
申请人： DOLBY INTERNATIONAL AB
发明人： PURNHAGEN, Heiko , EKSTRAND, Per
IPC分类号： G10L19/035 , G10L19/008
CPC分类号： H04W28/065 , G10L19/008 , G10L19/035 , G10L19/038 , H04S1/007 , H04S2420/03 , H04W28/0215
摘要： The present disclosure provides methods, devices and computer program products for non-uniform quantization of parameters relating to parametric spatial coding of audio signals. The disclosure further relates to a method and apparatus for reconstructing an audio object in an audio decoding system taking the non-uniformly quantized parameters into account. According to the disclosure, such an approach renders it possible to reduce bit consumption without substantially reducing the quality of the reconstructed audio object.
摘要翻译：本公开提供了用于与音频信号的参数空间编码相关的参数的非均匀量化的方法，设备和计算机程序产品。本发明还涉及一种在考虑到非均匀量化参数的音频解码系统中重建音频对象的方法和装置。根据本公开，这种方法使得可以在不显着降低重建的音频对象的质量的情况下减少比特消耗。

10. 发明申请

WO2014210284A1 BITSTREAM SYNTAX FOR SPATIAL VOICE CODING 审中-公开
标题翻译：用于空间语音编码的BITSTREAM语法
公开(公告)号：WO2014210284A1
公开(公告)日：2014-12-31
申请号：PCT/US2014/044295
申请日：2014-06-26
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： KLEJSA, Janusz , SAMUELSSON, Jonas , PURNHAGEN, Heiko , DICKINS, Glenn N.
IPC分类号： G10L19/032 , G10L19/008
CPC分类号： G10L19/008 , G10L19/002 , G10L19/0204 , G10L19/0212 , G10L19/032 , G10L19/035
摘要： An encoding system (100) encodes a first (E1) and further (E2, E3) audio signals as a layered bitstream (B), wherein a quantizer for each frequency band of each signal is selected using a rate allocation rule based on signal-specific rate allocation data, a spectral envelope of the signal and a reference level (EnvE1Max), which is determined based on the spectral envelope of the first signal and is not necessarily included in the bitstream. Further disclosed is a decoding system for reconstructing the audio signals based on the bitstream. In embodiments, the bitstream has a basic layer (B E1 ), which contains data that enable decoding of the first audio signal, and a spatial layer (B spatial ) facilitating decoding of the further audio signal(s). In embodiments, the encoding system prepares the bitstream subject to a basic-layer bitrate constraint and a total bitrate constraint.
摘要翻译：编码系统（100）将第一（E1）和另外（E2，E3）音频信号编码为分层比特流（B），其中使用基于信号的比特率的速率分配规则来选择每个信号的每个频带的量化器，特定速率分配数据，信号的频谱包络和基于第一信号的频谱包络确定并且不一定包括在比特流中的参考电平（EnvE1Max）。还公开了一种用于基于比特流重建音频信号的解码系统。在实施例中，比特流具有包含能够对第一音频信号进行解码的数据的基本层（BE1）以及便于对其它音频信号进行解码的空间层（B空间）。在实施例中，编码系统根据基本层比特率约束和总比特率约束准备比特流。

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