-
公开(公告)号：US09843859B2
公开(公告)日：2017-12-12
申请号：US14724375
申请日：2015-05-28
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Cheah Heng Tan , Linus Francis , Robert J. Novorita
CPC classification number: H04R1/46 , G10L19/265 , G10L21/0364 , H04R1/1016 , H04R3/005 , H04R2460/13
Abstract: Preprocessing speech signals from an indirect conduction microphone. One exemplary method preprocesses the speech signal in two stages. In stage one, an external speech sample is characterized using an auto regression model, and coefficients from the model are convolved with the internal speech signal from the indirect conduction microphone to produce a pre-conditioned internal speech signal. In stage two, a training sound is received by the indirect conduction microphone and filtered through a low-pass filter. The result is then modeled using auto regression, and inverted to produce an inverted filter model. The pre-conditioned internal speech signal is convolved with the inverted filter model to remove negative or undesirable acoustic characteristics and loss from the speech signal from the indirect conduction microphone.
-
公开(公告)号：US20160351203A1
公开(公告)日：2016-12-01
申请号：US14724375
申请日：2015-05-28
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Cheah Heng Tan , Linus Francis , Robert J. Novorita
CPC classification number: H04R1/46 , G10L19/265 , G10L21/0364 , H04R1/1016 , H04R3/005 , H04R2460/13
Abstract: Preprocessing speech signals from an indirect conduction microphone. One exemplary method preprocesses the speech signal in two stages. In stage one, an external speech sample is characterized using an auto regression model, and coefficients from the model are convolved with the internal speech signal from the indirect conduction microphone to produce a pre-conditioned internal speech signal. In stage two, a training sound is received by the indirect conduction microphone and filtered through a low-pass filter. The result is then modeled using auto regression, and inverted to produce an inverted filter model. The pre-conditioned internal speech signal is convolved with the inverted filter model to remove negative or undesirable acoustic characteristics and loss from the speech signal from the indirect conduction microphone.
Abstract translation: 从间接传导麦克风预处理语音信号。 一个示例性方法分两个阶段对语音信号进行预处理。 在第一阶段，使用自回归模型来表征外部语音样本，并且来自该模型的系数与来自间接传导麦克风的内部语音信号进行卷积以产生预处理的内部语音信号。 在第二阶段，间接传导麦克风接收到训练声，并通过低通滤波器进行滤波。 然后使用自动回归模拟结果，并反转以产生反向过滤器模型。 预处理的内部语音信号与反向滤波器模型进行卷积，以消除来自间接传导麦克风的语音信号的负面或不良声学特性和损耗。
-
公开(公告)号：US20150043539A1
公开(公告)日：2015-02-12
申请号：US13963293
申请日：2013-08-09
Applicant: MOTOROLA SOLUTIONS, INC
Inventor： THOMAS J. SENESE , Nathanael P. Kuehner , Todd A. Leigh , Harish Natarahjan , Robert J. Novorita , Mark Shahaf
IPC: H04W4/20
CPC classification number: H04W4/20 , H04M11/06 , H04M11/066 , H04W4/10 , H04W76/45 , H04W76/50 , H04W84/08
Abstract: A method, a subscriber unit, and a system provide concurrent voice and data systems and methods that “steal bits” from voice frames for low-speed concurrent data. In this manner, concurrent voice and data is supported over protocols that require voice-only in current operation such as Project 25 (P25). The stealing of bits from voice is done in a manner that is transparent and not noticeable to users. The systems and methods enable replication of signaling on the downlink and wireline segments that is replaced on the uplink, encoding of interleaving blocks that extend across multiple Layer 2 voice logical data units (LDUs), flexibility in replacing voice data in LDUs, indication of the availability of the service and an interleaving schedule, notification of upcoming stealing events via signaling, and the like.
Abstract translation: 一种方法，一个用户单元和一个系统提供并发的语音和数据系统和方法，从低速并发数据的语音帧“窃取位”。 以这种方式，通过协议需要并发语音和数据，这些协议仅需要现有操作中的语音（例如项目25（P25））。 从语音窃取位是以透明的方式进行的，而用户不明显。 这些系统和方法使得能够复制下行链路上的信令和在上行链路上被替换的有线线路段，跨越多个第2层语音逻辑数据单元（LDU）的交织块的编码，LDU中替换语音数据的灵活性， 服务的可用性和交织计划，通过信令的即将到来的窃取事件的通知等。
-
-
Search Results
3
records
(took 0.015 seconds)
