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1. 发明申请

WO2012093954A1 LOCAL MEDIA RENDERING 审中-公开
标题翻译：本地媒体渲染
公开(公告)号：WO2012093954A1
公开(公告)日：2012-07-12
申请号：PCT/SE2011/050003
申请日：2011-01-04
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , BJUREL, Jonas , ÅLUND, Staffan , ERIKSSON, Anders , KARLSSON, Erlendur , KLING, Lars-Örjan , LINDQUIST, Thomas
发明人： BJUREL, Jonas , ÅLUND, Staffan , ERIKSSON, Anders , KARLSSON, Erlendur , KLING, Lars-Örjan , LINDQUIST, Thomas
IPC分类号： H04L29/06 , H04L12/18 , H04M3/56 , H04N7/15
CPC分类号： H04L65/403 , H04L12/1881 , H04L47/2408 , H04L65/4038 , H04L65/60 , H04L65/605 , H04L67/18 , H04L69/24 , H04M3/568 , H04M2201/18 , H04N7/147 , H04N7/15
摘要： The invention involves local media rendering of a multi -party call, performed by a Client User Equipment (1). The media is encoded by each party in the call, and sent as a media stream to a Media server (2), and the media server receives a request for media streams from each Client User Equipment, each media stream in the request associated with a client priority. The Media server selects the media streams to send to each Client User Equipment, based on the request, and further such that the number of streams does not exceed a determined maximum number, which is based e.g. on the available bandwidth.
摘要翻译：本发明涉及由客户端用户设备（1）执行的多方呼叫的本地媒体呈现。媒体由呼叫中的每一方编码，并作为媒体流发送到媒体服务器（2），并且媒体服务器从每个客户端用户设备接收对媒体流的请求，请求中的每个媒体流与一个客户优先。媒体服务器根据请求选择要发送给每个客户机用户设备的媒体流，并且进一步使得流的数量不超过确定的最大数量，其基于例如。在可用带宽上。

2. 发明申请

WO2008135310A3 EARLY REFLECTION METHOD FOR ENHANCED EXTERNALIZATION 审中-公开
公开(公告)号：WO2008135310A3
公开(公告)日：2008-11-13
申请号：PCT/EP2008/053347
申请日：2008-03-20
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , SANDGREN, Patrik , ERIKSSON, Anders , KARLSSON, Erlendur
发明人： SANDGREN, Patrik , ERIKSSON, Anders , KARLSSON, Erlendur
IPC分类号： H04S1/00 , G10K15/08 , H04S3/00 , H04S5/00 , H04R5/04
摘要： Scenes having at least one simulated sound source and simulated sound- reflecting objects are simulated by processing a direct-sound signal with at least one head-related transfer-function, thereby generating a simulated direct-sound signal, and generating simulated early-reflection signals from the simulated direct-sound signal, including simulating early reflections having incidence angles different from the incidence angle of the direct-sound signal. Externalization of the simulated sound source is enhanced.

3. 发明申请

WO2008040805A1 SIMULATION OF ACOUSTIC OBSTRUCTION AND OCCLUSION 审中-公开
标题翻译：声学障碍和声音的模拟
公开(公告)号：WO2008040805A1
公开(公告)日：2008-04-10
申请号：PCT/EP2007/060601
申请日：2007-10-05
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , GUSTAFSSON, Harald , KARLSSON, Erlendur
发明人： GUSTAFSSON, Harald , KARLSSON, Erlendur
IPC分类号： H04S7/00
CPC分类号： H04S7/30 , H04S7/307
摘要： Realistic simulation of acoustic obstruction/occlusion effects in virtual-reality software applications is achieved by specifying whether a type of filter function is low- pass or high-pass and a cut-off frequency and stop-band attenuation of the filter function. The stop-band attenuation can be specified merely qualitatively, for example as "weak", "nominal", or "strong". As a complement or alternative, obstruction/occlusion can be specified in terms of obstruction objects, such as blocking objects, enclosure objects, surface objects, and medium objects. An obstruction object is specified in terms of one or more environmental parameters and corresponds to naturally occurring acoustically obstructive/occlusive objects, such as curtains, walls, forests, fields, etc. The two specification types - filter specification parameters and environmental parameters - may co-exist in the same implementation or one or the other of the interfaces can be used in a particular implementation.
摘要翻译：通过指定滤波器功能的类型是低通还是高通，以及滤波器功能的截止频率和阻带衰减来实现虚拟现实软件应用中的声学阻塞/遮挡效应的现实仿真。阻带衰减只能在质量上被定义为例如“弱”，“标称”或“强”。作为补充或替代方案，障碍物/闭塞可根据阻塞物体（例如阻塞物体，围护物体，表面物体和介质物体）来指定。根据一个或多个环境参数指定阻塞物体，并且对应于天然存在的声阻塞/闭塞物体，例如窗帘，墙壁，森林，场等。两种规格类型 - 过滤器规格参数和环境参数可以共同 - 在相同的实现中存在，或者一个或另一个接口可以在特定实现中使用。

4. 发明申请

WO2007111560A2 FILTER ADAPTIVE FREQUENCY RESOLUTION 审中-公开
标题翻译：滤波器自适应频率分辨率
公开(公告)号：WO2007111560A2
公开(公告)日：2007-10-04
申请号：PCT/SE2007/000299
申请日：2007-03-28
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , TALEB, Anisse , POBLOTH, Harald , KARLSSON, Erlendur , NORVELL, Erik
发明人： TALEB, Anisse , POBLOTH, Harald , KARLSSON, Erlendur , NORVELL, Erik
CPC分类号： H04S3/00 , H03H2017/0072 , H04S2400/01 , H04S2420/01 , H04S2420/03
摘要： In signal processing using digital filtering the representation of a filter is adapted depending on the filter characteristics. If e.g. a digital filter is represented by filter coefficients for transform bands Nos. 0, 1,..., K in the frequency domain, a reduced digital filter having coefficients for combined transform bands, i.e. subsets of the transformed bands, Nos. 0, 1,..., L, is formed and only these coefficients are stored. When the actual filtering in the digital filter is to be performed, an actual digital filter is obtained by expanding the coefficients of the reduced digital filter according to a mapping table and then used instead of the original digital filter.
摘要翻译：在使用数字滤波的信号处理中，滤波器的表示根据滤波器特性进行调整。如果例如数字滤波器由频域中的变换频带编号0，1，...，K的滤波器系数表示，具有用于组合变换频带的系数的减小数字滤波器，即变换频带的子集，编号0，1 ，...，L，并且仅存储这些系数。当要执行数字滤波器中的实际滤波时，通过根据映射表扩展缩小数字滤波器的系数，然后代替原始数字滤波器来获得实际的数字滤波器。

5. 发明申请

WO2007078254A3 PERSONALIZED DECODING OF MULTI-CHANNEL SURROUND SOUND 审中-公开
公开(公告)号：WO2007078254A3
公开(公告)日：2007-07-12
申请号：PCT/SE2007/000006
申请日：2007-01-05
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , TALEB, Anisse , KARLSSON, Erlendur
发明人： TALEB, Anisse , KARLSSON, Erlendur
IPC分类号： H04S3/00 , G10L19/00
摘要： A parametric multi-channel surround audio bitstream is received in a multi-channel decoder (13). The received spatial parameters are in combining unit (37) transformed into a new set of spatial parameters that are used in order to obtain a decoding of the multi-channel surround sound that is not a simple equivalent of the original input multi-channel surround signal but e.g. may be personalized by making the transformation based on a representation of user head related filters obtained from a unit (43). Such personalized spatial parameters may also be obtained by combining the received spatial parameters and a representation of the user head related filters with a set of additional rendering parameters that for example are interactively determined by the user and thus are time dependent.

6. 发明申请

WO2009127515A1 APPARATUS AND METHOD FOR PRODUCING 3D AUDIO IN SYSTEMS WITH CLOSELY SPACED SPEAKERS 审中-公开
标题翻译：用于在具有空间间隔扬声器的系统中生产3D音频的装置和方法
公开(公告)号：WO2009127515A1
公开(公告)日：2009-10-22
申请号：PCT/EP2009/053792
申请日：2009-03-31
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , KARLSSON, Erlendur , SANDGREN, Patrik
发明人： KARLSSON, Erlendur , SANDGREN, Patrik
IPC分类号： H04S1/00 , H04S7/00
CPC分类号： H04S1/00 , H04R2499/11 , H04S7/30 , H04S2420/01
摘要： An audio processing circuit includes a crosstalk cancellation circuit that is advantageously simplified for use in audio devices that have closely-spaced speakers. In particular, crosstalk filtering as implemented in the circuit assumes that the external head-related contralateral filters are time-delayed and attenuated versions of the external, head-related ipsilateral filters. With this assumption, the circuit's crosstalk filtering is configurable for varying audio characteristics, according to a small number of settable parameters. These parameters include configurable first and second attenuation parameters for cross-path signal attenuation, and configurable first and second delay parameters for cross-path delay. Optional sound normalization, if included, uses similar simplified parameterization. Further, in one or more embodiments, the audio processing circuit and method include or are associated with a defined table of parameters that are least-squares optimized solutions. The optimized parameter values provide wider listening sweet spots for a greater variety of listeners.
摘要翻译：音频处理电路包括有利地简化为用于具有紧密间隔的扬声器的音频设备的串扰消除电路。特别地，在电路中实现的串扰滤波假设外部头部相关对侧滤波器是外部头部相关同侧滤波器的时间延迟和衰减版本。根据这个假设，电路的串扰滤波可以根据少数的可设置参数进行配置以改变音频特性。这些参数包括用于交叉路径信号衰减的可配置的第一和第二衰减参数，以及用于交叉路径延迟的可配置的第一和第二延迟参数。可选的声音归一化（如果包括在内）使用类似的简化参数化。此外，在一个或多个实施例中，音频处理电路和方法包括或者与最小二乘优化解决方案的规定的参数表相关联。优化的参数值为更多种类的听众提供更广泛的聆听甜点。

7. 发明申请

WO2009002245A1 METHOD AND ARRANGEMENT FOR ENHANCING SPATIAL AUDIO SIGNALS 审中-公开
标题翻译：用于增强空间音频信号的方法和装置
公开(公告)号：WO2009002245A1
公开(公告)日：2008-12-31
申请号：PCT/SE2007/051077
申请日：2007-12-21
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , KARLSSON, Erlendur , DE BACHTIN, Sebastian
发明人： KARLSSON, Erlendur , DE BACHTIN, Sebastian
IPC分类号： G10L19/14 , G10L21/02
CPC分类号： G10L19/107 , G10L19/008 , G10L21/0364 , G10L25/90
摘要： In a method of enhancing spatial audio signals, receiving (SlO) an ACELP coded signal comprising a plurality of blocks. For each received block estimating (S20) a signal type based on at least one of the received signal and a set of decoder parameters, estimating (S30) a pitch frequency based on at least one of the received signal and the set of decoder parameters, and determining (S40) filtering parameters based on at least one of the estimated signal type and the estimated pitch frequency. Finally, high pass filtering (S50) the received signal based on the determined filter parameters to provide a high pass filtered output signal.
摘要翻译：在增强空间音频信号的方法中，接收（S10）包括多个块的ACELP编码信号。对于每个接收的块估计（S20），基于接收信号和一组解码器参数中的至少一个的信号类型，基于接收信号和解码器参数集合中的至少一个来估计（S30）音调频率，以及基于估计的信号类型和估计的音调频率中的至少一个来确定（S40）滤波参数。最后，基于所确定的滤波器参数对接收到的信号进行高通滤波（S50），以提供高通滤波的输出信号。

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

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.

10. 发明申请

WO2018208191A1 ASR TRAINING AND ADAPTATION 审中-公开
公开(公告)号：WO2018208191A1
公开(公告)日：2018-11-15
申请号：PCT/SE2017/050457
申请日：2017-05-08
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： GRANCHAROV, Volodya , SVERRISSON, Sigurdur , KARLSSON, Erlendur , VULGARAKIS FELJAN, Aneta , VANDIKAS, Konstantinos , TESLENKO, Maxim
IPC分类号： G10L15/065 , G10L15/183 , G10L17/00
摘要： AM and LM parameters to be used for adapting an ASR model are derived for each audio segment of an audio stream comprising multiple audio programs. A set of identifiers, including a speaker identifier, a speaker domain identifier and a program domain identifier, is obtained for each audio segment. The set of identifiers are used to select most suitable AM and LM parameters for the particular audio segment. 5 The embodiments enable provision of maximum constraints on the AMs and LMs and enable adaptation of the ASR model on the fly for audio streams of multiple audio programs, such as broadcast audio. This means that the embodiments enable selecting AM and LM parameters that are most suitable in terms of ASR performance for each audio segment.

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