公开(公告)号：US07586513B2

公开(公告)日：2009-09-08

申请号：US10819108

申请日：2004-04-07

Applicant: Petter Muren ,  Trygve Frederik Marton ,  Tom-Ivar Johansen

Inventor： Petter Muren ,  Trygve Frederik Marton ,  Tom-Ivar Johansen

IPC: H04N7/14

CPC classification number: H04N7/15 ,  H04R27/00

Abstract: An arrangement and a method of localizing active speakers in a video conference includes a localization device that locates at least one microphone relative to the camera, while the at least one microphone in turn localizes the relative positions of audio sources. As the microphones are usually positioned close to the audio source in a video conference, the ratio of the distance between microphones relative to the distance between table microphone and audio source is reduced. Thus, the microphones are able to determine the positions of the audio sources with a higher resolution than if placed close to the camera. When the respective positions of the microphones relative to the camera and the audio source are known, the position of the audio source relative to the camera is then determined by means of geometrical calculations.

Abstract translation: 在视频会议中定位主动扬声器的布置和方法包括定位设备，其定位相对于照相机的至少一个麦克风，而至少一个麦克风又使音频源的相对位置定位。 由于麦克风通常位于视频会议中靠近音频源的位置，麦克风之间的距离相对于桌麦克风和音频源之间的距离的比例将会降低。 因此，麦克风能够以比放置在相机附近更高的分辨率来确定音频源的位置。 当麦克风相对于相机和音频源的相应位置是已知的时，音频源相对于相机的位置然后通过几何计算来确定。

公开(公告)号：US07477735B2

公开(公告)日：2009-01-13

申请号：US11022293

申请日：2004-12-22

Applicant: Trygve Frederik Marton ,  Ingvar Flaten Aarnes ,  Bjørn Winsvold ,  Geir Ole Øverby

Inventor： Trygve Frederik Marton ,  Ingvar Flaten Aarnes ,  Bjørn Winsvold ,  Geir Ole Øverby

IPC: H04M9/08

CPC classification number: H04M9/082 ,  H04M9/08

Abstract: An audio communication system and method with improved acoustic characteristics features a stereo detector that is introduced in the echo canceller of the system. When stereo in far-end audio is detected, converging of the adaptive mono model of the canceller is suspended, and when stereo in far-end audio is not detected, converging of the adaptive stereo model of the canceller is suspended. The system may also be extended with a miscellaneous processing unit configured to attenuate the signal at certain events implying a large stereo echo contribution. A stereo collapsing unit is also introduced on the channels of the far-end audio to remove the stereo image at certain events to further suppress the echo contribution.

Abstract translation: 具有改善的声学特性的音频通信系统和方法具有引入到系统的回波消除器中的立体声检测器。 当检测到远端音频中的立体声时，暂停消除器的自适应单声道模型的收敛，并且当未检测到远端音频中的立体声时，中止自适应立体声模型的收敛。 该系统还可以用配置成在意味着大的立体声回波贡献的某些事件处衰减信号的杂项处理单元来扩展。 在远端音频的声道上还引入了立体声折叠单元，以在某些事件中去除立体声图像，以进一步抑制回波的贡献。

公开(公告)号：US08515086B2

公开(公告)日：2013-08-20

申请号：US12338719

申请日：2008-12-18

Applicant: Trygve Frederik Marton ,  Torgeir Grothe Lien

Inventor： Trygve Frederik Marton ,  Torgeir Grothe Lien

IPC: H04B3/20 ,  A61F11/06 ,  H04M9/08

CPC classification number: H04M9/082

Abstract: Different sampling rates between a playout unit and a capture unit are compensated for via a system, method and computer program product. The playout unit receives samples from a computational unit, and the capture unit sends samples to the computational unit. A playout FIFO buffer operates in a playout time domain, and a capture FIFO buffer operates in a capture time domain. The computational unit is synchronized to a common clock. A first relationship is calculated between the common clock and a playout fifo buffer read pointer, and a second relationship is calculated between the common clock and a capture FIFO buffer write pointer. For each sample in the playout time domain a corresponding sample in the samples from said computational unit is found and sent to the playout FIFO buffer. For each sample in the common clock time domain the corresponding sample in the capture time domain is found and sent to the computational unit.

Abstract translation: 通过系统，方法和计算机程序产品补偿播出单元和捕获单元之间的不同采样率。 播放单元从计算单元接收样本，并且捕获单元将样本发送到计算单元。 播放FIFO缓冲器在播放时域中操作，并且捕获FIFO缓冲器在捕获时域中操作。 计算单元与公共时钟同步。 在公共时钟和播出fifo缓冲区读指针之间计算第一关系，并且在公共时钟和捕获FIFO缓冲器写指针之间计算第二关系。 对于播放时域中的每个样本，找到来自所述计算单元的样本中的对应样本并发送到播放FIFO缓冲器。 对于公共时钟时域中的每个采样，捕获时域中的相应采样被发现并发送到计算单元。

公开(公告)号：US08437490B2

公开(公告)日：2013-05-07

申请号：US12691509

申请日：2010-01-21

Applicant: Trygve Frederik Marton

Inventor： Trygve Frederik Marton

IPC: H04R9/08 ,  H04R11/04

CPC classification number: H04R1/406 ,  H04R2430/21

Abstract: A video teleconferencing directional microphone has two surfaces joined with an angle of 90° relative to each other, a first omni directional microphone element arranged adjacent to the intersection between the two surfaces. The ceiling microphone assembly also includes a second omni directional microphone element arranged at a predetermined distance (d) from both surfaces. A subtractor subtracts the output of the first microphone element from the output of the second microphone element, and the output of the subtractor is equalized by an equalizer (Heq) to generate an equalized output. The surfaces and subtractor generates a quarter toroid directivity pattern for the ceiling microphone assembly. The quarter toroid sensitivity pattern increases sensitivity in the direction of a sound source of interest, but reduces sensitivity to any sound waves generated by noise sources at other locations or reverberations.

Abstract translation: 视频电话会议定向麦克风具有相对于彼此以90度的角度连接的两个表面，邻近两个表面之间的交叉点设置的第一全向麦克风元件。 天花板麦克风组件还包括从两个表面以预定距离（d）布置的第二全向麦克风元件。 减法器从第二麦克风元件的输出中减去第一麦克风元件的输出，并且减法器的输出由均衡器（Heq）相等以产生均衡的输出。 表面和减法器为天花板麦克风组件产生四分之一环形方向性图案。 四分之一环形灵敏度图案增加了感兴趣的声源的方向的灵敏度，但降低了对在其他位置或混响处的噪声源产生的任何声波的敏感度。

公开(公告)号：US20080174665A1

公开(公告)日：2008-07-24

申请号：US11966773

申请日：2007-12-28

Applicant: Gisle ENSTAD ,  Trygve Frederik Marton ,  Johan Ludvig Nielsen

Inventor： Gisle ENSTAD ,  Trygve Frederik Marton ,  Johan Ludvig Nielsen

IPC: H04N5/232

CPC classification number: H04N7/15 ,  H04N7/142 ,  H04R1/02 ,  H04R1/34

Abstract: An audio source tracking arrangement, integrated in or connected to a video conference system, for determining a position of a source creating a sound, including: at least an audio signal processing module configured to determine the position of the source creating the sound based on a plurality of audio signals originating from the source respectively captured by a plurality of microphones; and one or more microphone housings, respectively encapsulating at least one of the plurality of microphones, the one or more microphone housings including a cavity in which at least one of the plurality of microphones is localized, an aperture on a surface of the microphone housing, and a channel extending from the cavity to the aperture, wherein the channel and the cavity are dimensioned to form an acoustical amplifier with a frequency response having one or more high frequency peaks in a frequency band of the sound.

Abstract translation: 一种音频源跟踪装置，集成在或连接到视频会议系统，用于确定创建声音的源的位置，包括：至少一个音频信号处理模块，被配置为基于一个音频信号来确定创建声音的源的位置 源自分别由多个麦克风捕获的源的多个音频信号; 以及分别封装所述多个麦克风中的至少一个麦克风的一个或多个麦克风外壳，所述一个或多个麦克风外壳包括多个麦克风中的至少一个位于其中的空腔，麦克风外壳的表面上的孔， 以及从所述腔延伸到所述孔的通道，其中所述通道和所述腔的尺寸被设计成形成具有在所述声音的频带中具有一个或多个高频峰值的频率响应的声学放大器。

公开(公告)号：US07336294B2

公开(公告)日：2008-02-26

申请号：US10814863

申请日：2004-03-31

Applicant: Snorre Kjesbu ,  Finn Helge Lunde ,  Petter Muren ,  Trygve Frederik Marton

Inventor： Snorre Kjesbu ,  Finn Helge Lunde ,  Petter Muren ,  Trygve Frederik Marton

IPC: H04N7/14

CPC classification number: H04N7/144

Abstract: An arrangement and a method of a videoconferencing end-point provide for eye contact between users at different sites. A conference camera is placed in the light beam of a projector apparatus without degrading the camera-captured view by the projector light. This is provided by generating a black spot in the light beam covering the camera lens, and by adjusting the position and/or size of the black spot according to a camera position detector, which may be the camera itself or one or more light sensors around and close to the camera lens.

Abstract translation: 视频会议端点的布置和方法提供了在不同站点的用户之间的眼神接触。 会议摄像机被放置在投影仪设备的光束中，而不会因投射灯而降低相机拍摄的视野。 这是通过在覆盖照相机镜头的光束中产生黑点，并且通过根据照相机位置检测器调整黑点的位置和/或尺寸来提供的，摄像机位置检测器可以是照相机本身或一个或多个光传感器 并靠近相机镜头。

公开(公告)号：US07315619B2

公开(公告)日：2008-01-01

申请号：US11023586

申请日：2004-12-29

Applicant: Trygve Frederik Marton ,  Bjorn Winsvold ,  Tore Gravermoen

Inventor： Trygve Frederik Marton ,  Bjorn Winsvold ,  Tore Gravermoen

IPC: H04M1/00

CPC classification number: H04M9/082 ,  H04S2420/05

Abstract: The present invention relates to an audio communication system and method with improved acoustic characteristics. The present invention utilizes the Haas effect to simulate a sound picture that gives a better subjective impression of stereo sound compared to the objective stereo image. It provides a system and a method for presenting the stereo image in an optimal way for an associated echo canceller without compromising with the subjective perception of stereo.

Abstract translation: 本发明涉及具有改善的声学特性的音频通信系统和方法。 本发明利用哈斯效应来模拟与目标立体图像相比立体声的更好的主观印象的声音图像。 它提供了一种用于以相对于回声消除器的最佳方式呈现立体声图像的系统和方法，而不会影响立体声的主观感知。