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1. 发明公开

KR20200137026A 후처리 지연을 저감시킨 고주파 재구성 기술의 통합 审中-公开
公开(公告)号：KR20200137026A
公开(公告)日：2020-12-08
申请号：KR20207033980
申请日：2019-04-25
申请人： DOLBY INT AB
发明人： KJOERLING KRISTOFER , VILLEMOES LARS , PURNHAGEN HEIKO , EKSTRAND PER
IPC分类号： G10L19/16 , G10L19/18 , G10L21/038
摘要： 인코딩된오디오비트스트림을디코딩하기위한방법이개시된다. 방법은인코딩된오디오비트스트림을수신하는것 및디코딩된저대역오디오신호를생성하기위해오디오데이터를디코딩하는것을포함한다. 방법은고주파재구성메타데이터를추출하는것 및필터링된저대역오디오신호를생성하기위해분석필터뱅크로디코딩된저대역오디오신호를필터링하는것을더 포함한다. 방법은또한, 오디오데이터에대해스펙트럼변환또는고조파전위가수행되어야하는지여부를나타내는플래그를추출하는것 및플래그에따라필터링된저대역오디오신호및 고주파재구성메타데이터를사용하여오디오신호의고대역부분을재생성하는것을포함한다. 고주파재생성은오디오채널마다 3010개샘플의지연으로후처리동작으로서수행된다.

2. 发明申请

WO2010105926A2 ADVANCED STEREO CODING BASED ON A COMBINATION OF ADAPTIVELY SELECTABLE LEFT/RIGHT OR MID/SIDE STEREO CODING AND OF PARAMETRIC STEREO CODING 审中-公开
标题翻译：基于自适应可选左/右或中/侧立体声编码和参数立体声编码组合的高级立体声编码
公开(公告)号：WO2010105926A2
公开(公告)日：2010-09-23
申请号：PCT/EP2010052866
申请日：2010-03-05
申请人： DOLBY INT AB , PURNHAGEN HEIKO , CARLSSON PONTUS , KJOERLING KRISTOFER
发明人： PURNHAGEN HEIKO , CARLSSON PONTUS , KJOERLING KRISTOFER
IPC分类号： G10L19/00
CPC分类号： G10L19/002 , G10L19/008 , G10L19/18 , H04S3/02 , H04S5/00 , H04S5/005 , H04S5/02 , H04S2400/01 , H04S2400/03 , H04S2420/03
摘要： The application relates to audio encoder and decoder systems. An embodiment of the encoder system comprises a downmix stage for generating a downmix signal and a residual signal based on a stereo signal. In addition, the encoder system comprises a parameter determining stage for determining parametric stereo parameters such as an inter-channel intensity difference and an inter-channel cross-correlation. Preferably, the parametric stereo parameters are time- and frequency-variant. Moreover, the encoder system comprises a transform stage. The transform stage generates a pseudo left/right stereo signal by performing a transform based on the downmix signal and the residual signal. The pseudo stereo signal is processed by a perceptual stereo encoder. For stereo encoding, left/right encoding or mid/side encoding is selectable. Preferably, the selection between left/right stereo encoding and mid/side stereo encoding is time- and frequency-variant.
摘要翻译：该应用涉及音频编码器和解码器系统。编码器系统的实施例包括用于基于立体声信号来生成下混合信号和残余信号的下混合级。另外，编码器系统包括用于确定参数立体声参数（诸如声道间强度差和声道间互相关）的参数确定级。优选地，参数化立体声参数是时间和频率变化的。此外，编码器系统包括变换阶段。变换级通过基于缩混信号和残差信号执行变换来生成伪左/右立体声信号。伪立体声信号由感知立体声编码器处理。对于立体声编码，可以选择左/右编码或中/侧编码。优选地，左/右立体声编码和中/立体声编码之间的选择是时间和频率变化的。

3. 发明申请

WO2014161996A3 AUDIO PROCESSING SYSTEM 审中-公开
标题翻译：音频处理系统
公开(公告)号：WO2014161996A3
公开(公告)日：2014-12-04
申请号：PCT/EP2014056857
申请日：2014-04-04
申请人： DOLBY INT AB
发明人： KJOERLING KRISTOFER , PURNHAGEN HEIKO , VILLEMOES LARS
IPC分类号： G10L19/008 , G10L19/04 , G10L19/20
CPC分类号： G10L19/008 , G10L19/032 , G10L19/04 , G10L19/20
摘要： An audio processing system (100) comprises a front-end component (102, 103), which receives quantized spectral components and performs an inverse quantization, yielding a time-domain representation of an intermediate signal. The audio processing system further comprises a frequency-domain processing stage (104, 105, 106, 107, 108), configured to provide a time-domain representation of a processed audio signal, and a sample rate converter (109), providing a reconstructed audio signal sampled at a target sampling frequency. The respective internal sampling rates of the time-domain representation of the intermediate audio signal and of the time-domain representation of the processed audio signal are equal. In particular embodiments, the processing stage comprises a parametric upmix stage which is operable in at least two different modes and is associated with a delay stage that ensures constant total delay.
摘要翻译：音频处理系统（100）包括前端组件（102,103），其接收量化的频谱分量并执行逆量化，产生中间信号的时域表示。音频处理系统还包括频域处理级（104,105,106,107,108），被配置为提供经处理的音频信号的时域表示，以及采样率转换器（109），提供重建的以目标采样频率采样的音频信号。中间音频信号的时域表示和经处理的音频信号的时域表示的各自的内部采样率相等。在特定实施例中，处理阶段包括可在至少两个不同模式下操作的参数上混级，并且与确保恒定总延迟的延迟级相关联。

4. 发明申请

WO2013186344A3 SMOOTH CONFIGURATION SWITCHING FOR MULTICHANNEL AUDIO RENDERING BASED ON A VARIABLE NUMBER OF RECEIVED CHANNELS 审中-公开
标题翻译：基于可变数量的接收频道进行多通道音频渲染的最佳配置切换
公开(公告)号：WO2013186344A3
公开(公告)日：2014-02-06
申请号：PCT/EP2013062340
申请日：2013-06-14
申请人： DOLBY INT AB
发明人： PURNHAGEN HEIKO , SEHLSTROM LEIF , ROEDEN KARL JONAS , KJOERLING KRISTOFER , VILLEMOES LARS
IPC分类号： G10L19/008 , G10L19/005
CPC分类号： G10L19/008 , G10L19/0017 , G10L19/18 , H04S3/008 , H04S2400/03 , H04S2420/03
摘要： A decoding system reconstructs an n-channel audio signal on the basis of an input signal representing the audio signal, in different time frames, either by parametric coding or as n discretely coded channels. Parametric decoding uses a core signal and mixing parameters controlling a spatial synthesis stage, to which a downmix signal is supplied from a downmix stage. The downmix stage realizes a projection on the downmix signal based on an n- channel input signal, either a discretely coded signal or a core signal padded with neutral-valued channels. The padding may take place either on the decoding side (reduced parametric coding) or the encoding side. In an embodiment, an audio decoder (110) in the decoding system pads the core signal during an initial portion of each reduced parametrically coded time frame directly succeeding a discretely coded time frame and during a final portion of each reduced parametrically coded time frame directly preceding a discretely coded time frame.
摘要翻译：解码系统通过参数编码或作为n个离散编码的信道，在不同的时间帧中，基于表示音频信号的输入信号来重构n信道音频信号。参数解码使用核心信号和控制空间合成阶段的混合参数，下混合信号从下混合级提供给它。下混合阶段基于n-沟道输入信号，即离散编码信号或填充有中性信道的核心信号实现对下混信号的投影。填充可以在解码侧（缩减参数编码）或编码侧进行。在一个实施例中，解码系统中的音频解码器（110）在直接在离散编码的时间帧之后的每个缩减的参数编码的时间帧的初始部分和在直接前进的每个缩减的参数编码的时间帧的最后部分期间，离散编码的时间帧。

5. 发明申请

WO2013186343A3 SMOOTH CONFIGURATION SWITCHING FOR MULTICHANNEL AUDIO 审中-公开
标题翻译：多通道音频的最佳配置切换
公开(公告)号：WO2013186343A3
公开(公告)日：2014-02-06
申请号：PCT/EP2013062339
申请日：2013-06-14
申请人： DOLBY INT AB
发明人： PURNHAGEN HEIKO , SEHLSTROM LEIF , ROEDEN KARL JONAS , KJOERLING KRISTOFER , VILLEMOES LARS
IPC分类号： G10L19/18
CPC分类号： G10L19/008 , G10L19/0017 , G10L19/18 , H04S3/008 , H04S2400/03 , H04S2420/03
摘要： A decoding system (100) reconstructs an n-channel audio signal on the basis of an input signal (A) representing the audio signal either by parametric coding or as n discretely coded channels. Parametric decoding proceeds on the basis of a core signal and mixing parameters (a) controlling a spatial synthesis stage (150), which is supplied with a downmix signal from a downmix stage (140). A selector (170) controls the components of the decoding system, in steady-state parametric and discrete decoding mode and transitions between these. The downmix stage realizes a projection on the downmix signal based on an n-channel signal, either an n-channel input signal or a core signal padded with neutral values. The downmix stage is active in each time frame in which the input signal represents the audio signal by parametric coding and in at least the first time frame after the last time frame in each episode of parametrically coded time frames.
摘要翻译：解码系统（100）根据表示音频信号的输入信号（A），通过参数编码或作为n个离散编码的声道来重建n声道音频信号。基于核心信号和混合参数（a）进行参数解码，（a）控制空间合成级（150），其被提供有来自下混级（140）的降混信号。选择器（170）以稳态参数和离散解码模式控制解码系统的组件，并在这些模式之间转换。下混合阶段基于n沟道信号（n沟道输入信号或填充有中性值的核心信号）实现对下混合信号的投影。下混合阶段在每个时间帧中是活动的，其中输入信号通过参数编码表示音频信号，并且至少在每个参数编码的时间帧的最后一个时间帧之后的第一时间帧中。

6. 发明申请

WO2011073201A3 SBR BITSTREAM PARAMETER DOWNMIX 审中-公开
公开(公告)号：WO2011073201A3
公开(公告)日：2011-10-06
申请号：PCT/EP2010069651
申请日：2010-12-14
申请人： DOLBY INT AB , KJOERLING KRISTOFER , THESING ROBIN
发明人： KJOERLING KRISTOFER , THESING ROBIN
IPC分类号： G10L19/00 , G10L19/008 , G10L21/02 , G10L21/038
CPC分类号： G10L19/008 , G10L21/038
摘要： The present document relates to audio decoding and/or audio transcoding. In particular, the present document relates to a scheme for efficiently decoding a number M of audio channels from a bitstream comprising a higher number N of audio channels. In this context a method and system for merging a first and a second source set of spectral band replication (SBR) parameters to a target set of SBR parameters is described. The first and second source set comprise a first and second frequency band partitioning, respectively, which are different from one another. The first source set comprises a first set of energy related values associated with frequency bands of the first frequency band partitioning. The second source set comprises a second set of energy related values associated with frequency bands of the second frequency band partitioning. The target set comprises a target energy related value associated with an elementary frequency band. The method comprises the steps of breaking up the first and the second frequency band partitioning into a joint grid comprising the elementary frequency band; assigning a first value of the first set of energy related values to the elementary frequency band; assigning a second value of the second set of energy related values to the elementary frequency band; and combining the first and second value to yield the target energy related value for the elementary frequency band.
摘要翻译：本文件涉及音频解码和/或音频代码转换。特别地，本文件涉及一种用于从包括较高数目的N个音频声道的比特流有效地解码M个音频声道的方案。在这种情况下，描述了用于将第一和第二源光谱带复制（SBR）参数集合合并为目标SBR参数集合的方法和系统。第一和第二源组分别包括彼此不同的第一和第二频带划分。第一源集合包括与第一频带划分的频带相关联的第一组能量相关值。第二源集合包括与第二频带划分的频带相关联的第二组能量相关值。目标集合包括与基本频带相关联的目标能量相关值。该方法包括以下步骤：将第一和第二频带划分成包括基本频带的联合网格; 将第一组能量相关值的第一值分配给基本频带; 将第二组能量相关值的第二值分配给基本频带; 以及组合第一和第二值以产生基本频带的目标能量相关值。

7. 发明专利

ES2399058T3 Aparato y procedimiento para generar una señal de control de sintetizador de múltiples canales y aparato y procedimiento para sintetizar múltipes canales 未知
公开(公告)号：ES2399058T3
公开(公告)日：2013-03-25
申请号：ES06706309
申请日：2006-01-19
申请人： FRAUNHOFER GES FORSCHUNG , KONINKL PHILIPS ELECTRONICS NV , DOLBY INT AB , DOLBY INT AB , KONINKL PHILIPS ELECTRONICS NV
发明人： NEUSINGER MATTHIAS , HERRE JUERGEN , DISCH SASCHA , PURNHAGEN HEIKO , KJOERLING KRISTOFER , ENGDEGARD JONAS , BREEBAART J , SCHUIJERS E , OOMEN W
IPC分类号： H04S5/00
摘要： Aparato para generar una señal de control de sintetizador de múltiples canales, que comprende: un analizador de señal para analizar una señal de alimentación de múltiples canales; una calculadora para información de alisamiento, para determinar información de control de alisamiento en respuestaal analizador de señal, siendo la calculadora de información de alisamiento operativa para determinar la informaciónde control de alisamiento tal que, en respuesta a la información de control de alisamiento, un post-procesador lateralde sintetizador separado según la reivindicación 16 genera un parámetro de reconstrucción post-procesado o unacantidad post-procesada derivada del parámetro de reconstrucción, por una porción de tiempo de una señal dealimentación a procesar; y un generador de datos para generar una señal de control que representa la información de control de alisamientocomo la señal de control de sintetizador de múltiples canales.

8. 发明专利

HUE059669T2 Visszafelé kompatibilis integrálása magas frekvenciás rekonstrukciós technikáknak audio jelekhez 未知
公开(公告)号：HUE059669T2
公开(公告)日：2022-12-28
申请号：HUE21164481
申请日：2019-01-28
申请人： DOLBY INT AB
发明人： KJOERLING KRISTOFER , VILLEMOES LARS , PURNHAGEN HEIKO , EKSTRAND PER
IPC分类号： G10L19/00

9. 发明专利

PL3872809T3 WSTECZNIE KOMPATYBILNA INTEGRACJA TECHNIK REKONSTRUKCJI WYSOKIEJ CZĘSTOTLIWOŚCI DLA SYGNAŁÓW AUDIO 未知
公开(公告)号：PL3872809T3
公开(公告)日：2022-09-26
申请号：PL21164481
申请日：2019-01-28
申请人： DOLBY INT AB
发明人： KJOERLING KRISTOFER , VILLEMOES LARS , PURNHAGEN HEIKO , EKSTRAND PER
IPC分类号： G10L19/00

10. 发明专利

BR122020020698B1 Método para decodificação, meio legível por computador não transitório para decodificação, decodificador, e método de codificação de áudio para codificação em forma de onda intercalada 未知
公开(公告)号：BR122020020698B1
公开(公告)日：2022-05-31
申请号：BR122020020698
申请日：2014-04-04
申请人： DOLBY INT AB
发明人： MUNDT HARALD , PURNHAGEN HEIKO , KARL JONAS ROEDEN , KJOERLING KRISTOFER , THESING ROBIN
IPC分类号： G10L19/02 , G10L19/26 , G10L21/038
摘要： a presente invenção refere-se a métodos e aparelhos para decodificação e codificação de sinais de áudio. em particular, um método para decodificação inclui receber um sinal codificado em forma de onda tendo um conteúdo espectral correspondente a um subconjunto da faixa de frequência acima de uma frequência de cruzamento. o sinal codificado em forma de onda é intercalado com uma reconstrução de alta frequência paramétrica do sinal de áudio acima da frequência de cruzamento. desta forma uma reconstrução melhorada das bandas de alta frequência do sinal de áudio é alcançada.

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