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1. 发明公开

US20230283293A1 METHODS AND DEVICES FOR VECTOR SEGMENTATION FOR CODING 审中-公开
公开(公告)号：US20230283293A1
公开(公告)日：2023-09-07
申请号：US18121032
申请日：2023-03-14
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Tomas JANSSON TOFTGÅRD , Volodya GRANCHAROV , Jonas SVEDBERG
IPC分类号： H03M7/30 , H04N19/124 , H04N19/192 , H04N19/94 , G06F17/16 , G10L19/038
CPC分类号： H03M7/3082 , H04N19/124 , H04N19/192 , H04N19/94 , G06F17/16 , G10L19/038
摘要： A method for partitioning of input vectors for coding is presented. The method comprises obtaining of an input vector. The input vector is segmented, in a non-recursive manner, into an integer number, NSEG, of input vector segments. A representation of a respective relative energy difference between parts of the input vector on each side of each boundary between the input vector segments is determined, in a recursive manner. The input vector segments and the representations of the relative energy differences are provided for individual coding. Partitioning units and computer programs for partitioning of input vectors for coding, as well as positional encoders, are presented.

2. 发明申请

US20210272575A1 ADAPTIVE COMFORT NOISE PARAMETER DETERMINATION 有权
公开(公告)号：US20210272575A1
公开(公告)日：2021-09-02
申请号：US17256073
申请日：2019-06-26
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Fredrik JANSSON , Tomas JANSSON TOFTGÅRD
IPC分类号： G10L19/012 , G10L19/008 , G10L25/84
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 CNused; and providing the CN parameter CNused to a decoder. The CN parameter CNused is calculated based at least in part on the current inactive segment and a previous inactive segment.

3. 发明申请

US20190267013A1 DETERMINING THE INTER-CHANNEL TIME DIFFERENCE OF A MULTI-CHANNEL AUDIO SIGNAL 审中-公开
公开(公告)号：US20190267013A1
公开(公告)日：2019-08-29
申请号：US16410494
申请日：2019-05-13
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Manuel BRIAND , Tomas JANSSON TOFTGÅRD
IPC分类号： G10L19/008 , G10L19/20 , H04S3/00 , H04S7/00
摘要： A method and device are disclosed for determining an inter-channel time difference of a multi-channel audio signal having at least two channels. A determination is made at a number of consecutive time instances, inter-channel correlation based on a cross-correlation function involving at least two different channels of the multi-channel audio signal. Each value of the inter-channel correlation is associated with a corresponding value of the inter-channel time difference. An adaptive inter-channel correlation threshold is adaptively determined based on adaptive smoothing of the inter-channel correlation in time. A current value of the inter-channel correlation is then evaluated in relation to the adaptive inter-channel correlation threshold to determine whether the corresponding current value of the inter-channel time difference is relevant. Based on the result of this evaluation, an updated value of the inter-channel time difference is determined.

4. 发明公开

US20240275401A1 METHODS AND DEVICES FOR VECTOR SEGMENTATION FOR CODING 审中-公开
公开(公告)号：US20240275401A1
公开(公告)日：2024-08-15
申请号：US18413974
申请日：2024-01-16
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Tomas JANSSON TOFTGÅRD , Volodya GRANCHAROV , Jonas SVEDBERG
IPC分类号： H03M7/30 , G06F17/16 , G10L19/038 , H04N19/124 , H04N19/192 , H04N19/94
CPC分类号： H03M7/3082 , G06F17/16 , G10L19/038 , H04N19/124 , H04N19/192 , H04N19/94
摘要： A method for partitioning of input vectors for coding is presented. The method comprises obtaining of an input vector. The input vector is segmented, in a non-recursive manner, into an integer number, NSEG, of input vector segments. A representation of a respective relative energy difference between parts of the input vector on each side of each boundary between the input vector segments is determined, in a recursive manner. The input vector segments and the representations of the relative energy differences are provided for individual coding. Partitioning units and computer programs for partitioning of input vectors for coding, as well as positional encoders, are presented.

5. 发明公开

US20230410820A1 ADAPTIVE COMFORT NOISE PARAMETER DETERMINATION 审中-公开
公开(公告)号：US20230410820A1
公开(公告)日：2023-12-21
申请号：US18307319
申请日：2023-04-26
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Fredrik JANSSON , Tomas JANSSON TOFTGÅRD
IPC分类号： G10L19/012 , G10L19/008 , G10L25/84
CPC分类号： G10L19/012 , G10L19/008 , G10L25/84 , G10L2025/786
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 CNused; and providing the CN parameter CNused to a decoder. The CN parameter CNused is calculated based at least in part on the current inactive segment and a previous inactive segment.

6. 发明申请

US20220392463A1 METHOD AND APPARATUS FOR INCREASING STABILITY OF AN INTER-CHANNEL TIME DIFFERENCE PARAMETER 有权
公开(公告)号：US20220392463A1
公开(公告)日：2022-12-08
申请号：US17842499
申请日：2022-06-16
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Erik NORVELL , Tomas JANSSON TOFTGÅRD
IPC分类号： G10L19/008 , G10L19/26 , G10L21/0308
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, ICTDest(m), for an audio frame m and a stability estimate of said ICTD estimate, and determining whether the obtained ICTD estimate, ICTDest(m), is valid. If the ICTDest(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 ICTDest(m) is not found during the hang-over time.

7. 发明申请

US20200184981A1 METHOD AND APPARATUS FOR ADAPTIVE CONTROL OF DECORRELATION FILTERS 审中-公开
公开(公告)号：US20200184981A1
公开(公告)日：2020-06-11
申请号：US16463619
申请日：2017-11-23
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： Tomas JANSSON TOFTGÅRD , Tommy FALK
IPC分类号： G10L19/008 , H04S3/00
摘要： An audio signal processing method and apparatus for adaptively adjusting a decorrelator. The method comprises obtaining a control parameter and calculating mean and variation of the control parameter. Ratio of the variation and mean of the control parameter is calculated, and a decorrelation parameter is calculated based on the said ratio. The decorrelation parameter is then provided to a decorrelator.

8. 发明申请

US20190268016A1 METHODS AND DEVICES FOR VECTOR SEGMENTATION FOR CODING 审中-公开
公开(公告)号：US20190268016A1
公开(公告)日：2019-08-29
申请号：US16405229
申请日：2019-05-07
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Tomas JANSSON TOFTGÅRD , Volodya GRANCHAROV , Jonas SVEDBERG
IPC分类号： H03M7/30 , G10L19/038 , G06F17/16 , H04N19/124 , H04N19/192 , H04N19/94
摘要： A method for partitioning of input vectors for coding is presented. The method comprises obtaining of an input vector. The input vector is segmented, in a non-recursive manner, into an integer number, NSEG, of input vector segments. A representation of a respective relative energy difference between parts of the input vector on each side of each boundary between the input vector segments is determined, in a recursive manner. The input vector segments and the representations of the relative energy differences are provided for individual coding. Partitioning units and computer programs for partitioning of input vectors for coding, as well as positional encoders, are presented.

9. 发明申请

US20160198279A1 DETERMINING THE INTER-CHANNEL TIME DIFFERENCE OF A MULTI-CHANNEL AUDIO SIGNAL 有权
标题翻译：确定多通道音频信号的通道时间差
公开(公告)号：US20160198279A1
公开(公告)日：2016-07-07
申请号：US15073068
申请日：2016-03-17
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Manuel BRIAND , Tomas JANSSON TOFTGÅRD
IPC分类号： H04S3/00 , G10L19/008
CPC分类号： G10L19/008 , G10L19/20 , H04R2499/11 , H04S3/008 , H04S7/00 , H04S2420/01 , H04S2420/03
摘要： A method and device are disclosed for determining an inter-channel time difference of a multi-channel audio signal having at least two channels. A determination is made at a number of consecutive time instances, inter-channel correlation based on a cross-correlation function involving at least two different channels of the multi-channel audio signal. Each value of the inter-channel correlation is associated with a corresponding value of the inter-channel time difference. An adaptive inter-channel correlation threshold is adaptively determined based on adaptive smoothing of the inter-channel correlation in time. A current value of the inter-channel correlation is then evaluated in relation to the adaptive inter-channel correlation threshold to determine whether the corresponding current value of the inter-channel time difference is relevant. Based on the result of this evaluation, an updated value of the inter-channel time difference is determined.
摘要翻译：公开了一种用于确定具有至少两个通道的多声道音频信号的信道间时间差的方法和装置。在多个连续时间实例中确定基于涉及多声道音频信号的至少两个不同信道的互相关函数的信道间相关。信道间相关的每个值与信道间时间差的对应值相关联。基于时间上的信道间相关的自适应平滑自适应地确定自适应信道间相关阈值。然后，关于自适应信道间相关阈值评估信道间相关的当前值，以确定信道间时间差的相应当前值是否相关。根据该评价结果，确定通道间时差的更新值。

10. 发明公开

US20240274138A1 METHOD AND APPARATUS FOR ADAPTIVE CONTROL OF DECORRELATION FILTERS 审中-公开
公开(公告)号：US20240274138A1
公开(公告)日：2024-08-15
申请号：US18582932
申请日：2024-02-21
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： Tomas JANSSON TOFTGÅRD , Tommy FALK
IPC分类号： G10L19/008 , H04S3/00
CPC分类号： G10L19/008 , H04S3/008 , H04S2400/01 , H04S2420/03 , H04S2420/07
摘要： An audio signal processing method and apparatus for adaptively adjusting a decorrelator. The method comprises obtaining a control parameter and calculating mean and variation of the control parameter. Ratio of the variation and mean of the control parameter is calculated, and a decorrelation parameter is calculated based on the said ratio. The decorrelation parameter is then provided to a decorrelator.

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