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1. 发明申请

WO2020144061A1 SPATIALLY-BOUNDED AUDIO ELEMENTS WITH INTERIOR AND EXTERIOR REPRESENTATIONS 审中-公开
公开(公告)号：WO2020144061A1
公开(公告)日：2020-07-16
申请号：PCT/EP2019/086876
申请日：2019-12-20
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： FALK, Tommy , KARLSSON, Erlendur , ZHANG, Mengqiu , JANSSON TOFTGÅRD, Tomas , DE BRUIJN, Werner
IPC分类号： H04S7/00
摘要： A method of audio rendering. The method includes receiving an audio element, wherein the audio element comprises: i) an interior representation that is valid within a spatial region, the interior representation of the audio element being in a listener-centric format and ii) information indicating the spatial region. The method further includes determining that a listener is outside the spatial region. The method further includes deriving an exterior representation of the audio element and rendering the audio element using the exterior representation of the audio element. In another aspect, a method of providing a spatially -bounded audio element is provided. The method includes providing, to a rendering node, an audio element. The audio element includes: (i) an interior representation that is valid within a spatial region, the interior representation being in a listener-centric format; and (ii) information indicating the spatial region.

2. 发明申请

WO2022008470A1 COMFORT NOISE GENERATION FOR MULTI-MODE SPATIAL AUDIO CODING 审中-公开
公开(公告)号：WO2022008470A1
公开(公告)日：2022-01-13
申请号：PCT/EP2021/068565
申请日：2021-07-06
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： JANSSON TOFTGÅRD, Tomas , KINUTHIA, Charles , JANSSON, Fredrik
IPC分类号： G10L19/012 , G10L19/008 , G10L19/18
摘要： A method for generating comfort noise is provided. The method includes providing a first set of background noise parameters N1 for at least one audio signal in a first spatial audio coding mode and a second set of background noise parameters N2 for the at least one audio signal in a second spatial audio coding mode. The first spatial audio coding mode is used for active segments; the second spatial audio coding mode is used for inactive segments. The method further includes adapting the first set of background noise parameters N1 to the second spatial audio coding mode, thereby providing a first set of adapted background noise parameters N̂1. The method further includes generating comfort noise parameters by combining N̂1 and N2 over a transition period. The method further includes generating comfort noise based on the comfort noise parameters.

3. 发明申请

WO2019193156A1 SUPPORT FOR GENERATION OF COMFORT NOISE 审中-公开
公开(公告)号：WO2019193156A1
公开(公告)日：2019-10-10
申请号：PCT/EP2019/058650
申请日：2019-04-05
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： JANSSON, Fredrik , NORVELL, Erik , JANSSON TOFTGÅRD, Tomas
IPC分类号： G10L19/012 , G10L19/008
摘要： A method and a transmitting node for supporting generation of comfort noise for at least two audio channels at a receiving node. The method is performed by a transmitting node. The method comprises determining spectral characteristics of audio signals on at least two input audio channels and determining a spatial coherence between the audio signals. The spatial coherence is associated with perceptual importance measures. A compressed representation of the spatial coherence is determined per frequency band by weighting the spatial coherence within each frequency band according to the perceptual importance measures. Information about the spectral characteristics and the compressed representation of the spatial coherence per frequency band is signaled to the receiving node for enabling the generation of the comfort noise at the receiving node.

4. 发明申请

WO2022262960A1 IMPROVED STABILITY OF INTER-CHANNEL TIME DIFFERENCE (ITD) ESTIMATOR FOR COINCIDENT STEREO CAPTURE 审中-公开
公开(公告)号：WO2022262960A1
公开(公告)日：2022-12-22
申请号：PCT/EP2021/066159
申请日：2021-06-15
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： NORVELL, Erik , JANSSON TOFTGÅRD, Tomas
IPC分类号： G10L19/008
摘要： A method and apparatus (110, 120, 1000, 1006) to identify coincident microphone configurations, CC, and adapt an inter-channel time difference, ITD, search, in an encoder or a decoder is provided. The method includes for each frame m of a multi-channel audio signal: generating a cross-correlation of a channel pair of the multi-channel audio signal; determining a first ITD estimate based on the cross-correlation; determining if the multi-channel audio signal is a CC signal; and responsive to determining that the multi-channel audio signal is a CC signal, biasing the ITD search to favor ITDs close to zero to obtain a final ITD.

5. 发明申请

WO2022223132A1 ERROR CORRECTION OF HEAD-RELATED FILTERS 审中-公开
公开(公告)号：WO2022223132A1
公开(公告)日：2022-10-27
申请号：PCT/EP2021/060722
申请日：2021-04-23
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： KARLSSON, Erlendur , ZHANG, Mengqiu , JANSSON TOFTGÅRD, Tomas
IPC分类号： H04S1/00 , H04S7/00
摘要： A method for generating a final corrected head-related (HR) filter dataset, (A). The method includes obtaining a first corrected HR filter dataset, (B). Obtaining the first corrected HR filter dataset (B) includes: obtaining (s802) an initial HR filter dataset, (C); obtaining (s804) an extracted HR filter dataset, (D), extracted from the initial HR filter dataset, (C); obtaining (s806) a model, (E), of the extracted HR filter dataset, (D); generating (s808) a modelled HR filter dataset,(F), using the model, (E); selecting (s810) for correction one or more HR filters that are included in the initial HR filter dataset, (C), based on the modelled HR filter dataset, (F), and the extracted HR filter dataset, (D); and generating (s812) the first corrected HR filter dataset, (B) by correcting the selected one or more HR filters. Either the final corrected HR filter dataset (A) is the first corrected HR filter dataset (B) or the method further comprises generating the final corrected HR filter set (A) using the first corrected HR filter dataset (B).

6. 发明申请

WO2017153466A1 A METHOD AND APPARATUS FOR INCREASING STABILITY OF AN INTER-CHANNEL TIME DIFFERENCE PARAMETER 审中-公开
标题翻译：提高信道间时差参数稳定性的方法和装置
公开(公告)号：WO2017153466A1
公开(公告)日：2017-09-14
申请号：PCT/EP2017/055430
申请日：2017-03-08
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： NORVELL, Erik , JANSSON TOFTGÅRD, Tomas
IPC分类号： G10L19/008 , G10L25/06
摘要： A method for increasing stability of an inter-channel time difference (ICTD) parameter in parametric audio coding, wherein a multi-channel audio input signal comprising at least two channels is received. The method comprises obtaining an ICTD estimate, ICTD est (m), for an audio frame m and a stability estimate of said ICTD estimate, and determining whether the obtained ICTD estimate, ICTD est (m), is valid. If the ICTD est (m) is not found valid, and a determined sufficient number of valid ICTD estimates have been found in preceding frames, a hang-over time is determined using the stability estimate and a previously obtained valid ICTD parameter, ICTD (m—1), is selected as an output parameter, ICTD (m), during the hang-over time. The output parameter, ICTD (m), is set to zero if valid ICTD est (m) is not found during the hang-over time.
摘要翻译：一种用于增加参数音频编码中的声道间时间差（ICTD）参数的稳定性的方法，其中接收包括至少两个声道的多声道音频输入信号。该方法包括对于音频帧m和所述ICTD估计的稳定性估计获得ICTD估计，ICTD est（m），以及确定所获得的ICTD估计值ICTD est（m）是否有效。如果ICTD _{（m）没有被发现有效，并且在前面的帧中发现了足够数量的有效ICTD估计值，使用稳定性估计来确定延迟时间，并且选择先前获得的有效ICTD参数ICTD（m-1）作为输出参数，ICTD（m），在暂停期间。如果有效的ICTD est 不是（m），则输出参数ICTD（m）被设置为零在停留期间发现。}

7. 发明申请

WO2021180310A1 REPRESENTATION AND RENDERING OF AUDIO OBJECTS 审中-公开
公开(公告)号：WO2021180310A1
公开(公告)日：2021-09-16
申请号：PCT/EP2020/056349
申请日：2020-03-10
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： DE BRUIJN, Werner , JANSSON TOFTGÅRD, Tomas , FALK, Tommy
IPC分类号： G06F3/16
摘要： A method (900) for representing a cluster of audio objects (202). The method includes obtaining (s902) reference position information identifying a reference position within the cluster of audio objects; and using the obtained reference position information, transforming (s904) the cluster of audio objects into a composite spatial audio object. The transforming of the cluster of audio objects into the composite spatial audio object is performed independently of any listening position of any user.

8. 发明申请

WO2020144062A1 EFFICIENT SPATIALLY-HETEROGENEOUS AUDIO ELEMENTS FOR VIRTUAL REALITY 审中-公开
公开(公告)号：WO2020144062A1
公开(公告)日：2020-07-16
申请号：PCT/EP2019/086877
申请日：2019-12-20
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： FALK, Tommy , KARLSSON, Erlendur , ZHANG, Mengqiu , JANSSON TOFTGÅRD, Tomas , DE BRUIJN, Werner
IPC分类号： H04S7/00
摘要： In one aspect, there is a method for rendering a spatially-heterogeneous audio element. In some embodiments, the method includes obtaining two or more audio signals representing the spatially-heterogeneous audio element, wherein a combination of the audio signals provides a spatial image of the spatially-heterogeneous audio element. The method also includes obtaining metadata associated with the spatially-heterogeneous audio element, the metadata comprising spatial extent information indicating a spatial extent of the audio element. The method further includes rendering the audio element using: i) the spatial extent information and ii) location information indicating a position (e.g. virtual position) and/or an orientation of the user relative to the audio element.

9. 发明申请

WO2020002448A1 ADAPTIVE COMFORT NOISE PARAMETER DETERMINATION 审中-公开
公开(公告)号：WO2020002448A1
公开(公告)日：2020-01-02
申请号：PCT/EP2019/067037
申请日：2019-06-26
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： JANSSON, Fredrik , JANSSON TOFTGÅRD, Tomas
IPC分类号： G10L19/012 , G10L19/008
摘要： A method for generating a comfort noise (CN) parameter is provided. The method includes receiving an audio input; detecting, with a Voice Activity Detector (VAD), a current inactive segment in the audio input; as a result of detecting, with the VAD, the current inactive segment in the audio input, calculating a CN parameter CN used ; and providing the CN parameter CN used to a decoder. The CN parameter CN used is calculated based at least in part on the current inactive segment and a previous inactive segment.

10. 发明申请

WO2017137069A1 PROCESSING AN AUDIO WAVEFORM 审中-公开
标题翻译：处理音频波形
公开(公告)号：WO2017137069A1
公开(公告)日：2017-08-17
申请号：PCT/EP2016/052688
申请日：2016-02-09
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： GRANCHAROV, Volodya , JANSSON TOFTGÅRD, Tomas
IPC分类号： G10L15/04 , G10L25/78
CPC分类号： G10L15/04 , G10L25/21 , G10L25/24 , G10L25/78
摘要： There is provided mechanisms for processing an audio waveform, the method being performed by an audio processing device. A method comprises obtaining a sequence of logarithmic energy values of an audio waveform. The audio waveform is composed of frames. One logarithmic energy value is provided for each frame. The method comprises determining stationary segments of frames of the audio waveform using the obtained logarithmic energy values. The method comprises determining one respective mel-frequency cepstral coefficient (MFCC) vector for each stationary segment using the logarithmic energy values in the respective determined stationary segments.
摘要翻译：提供了用于处理音频波形的机制，该方法由音频处理设备执行。一种方法包括获得音频波形的对数能量值序列。音频波形由帧组成。为每个帧提供一个对数能量值。该方法包括使用获得的对数能量值确定音频波形的帧的静止段。该方法包括使用各自确定的静止段中的对数能量值为每个静止段确定一个相应的梅尔频率倒谱系数（MFCC）向量。

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