公开(公告)号：US20150092585A1

公开(公告)日：2015-04-02

申请号：US14500059

申请日：2014-09-29

Applicant: Apple Inc.

Inventor： Tiange Shao ,  Onur E. Tackin ,  Oren M. Elrad

IPC: H04W28/02 ,  H04L12/26 ,  H04L12/853 ,  H04W24/08

CPC classification number: H04L47/2416 ,  H04L43/0835 ,  H04L43/087 ,  H04L47/283 ,  H04L47/564 ,  H04L65/608 ,  H04L65/80 ,  H04W4/80 ,  H04W28/0236

Abstract: This disclosure relates to adjusting a jitter buffer at a wireless device based on inter-arrival-jitter (IAJ). In one embodiment, an IAJ value may be calculated for each of multiple received packets. An IAJ distribution may be generated for the received packets. A target packet loss rate may be determined. A quality of service value for IAJ distributions corresponding to the target packet loss rate may be determined. A de-jitter delay value may be calculated based on the IAJ distribution and the quality of service value for IAJ distributions. The de-jitter delay value may be used to adjust the jitter buffer at the wireless device.

Abstract translation: 本公开涉及基于到达间抖动（IAJ）来调整无线设备处的抖动缓冲器。 在一个实施例中，可以为多个接收的分组中的每一个计算IAJ值。 可以为接收到的分组生成IAJ分发。 可以确定目标分组丢失率。 可以确定与目标丢包率相对应的IAJ分发的服务质量值。 可以基于IAJ分布和IAJ分布的服务质量值来计算去抖动延迟值。 去抖动延迟值可用于调整无线设备处的抖动缓冲区。

公开(公告)号：US09107159B2

公开(公告)日：2015-08-11

申请号：US14293494

申请日：2014-06-02

Applicant: Apple Inc.

Inventor： Luciano M Verger ,  Madhusudan Chaudhary ,  Onur E Tackin ,  Oren M Elrad ,  Srinivasan Vasudevan ,  Thanigaivelu Elangovan ,  Tiange Shao

IPC: H04L1/00 ,  H04W56/00 ,  H04W36/00 ,  H04J3/06 ,  H04L29/06 ,  H04W36/14 ,  H04L1/20

CPC classification number: H04W56/003 ,  H04J3/0632 ,  H04L1/203 ,  H04L1/205 ,  H04L29/06027 ,  H04L65/80 ,  H04L67/322 ,  H04W36/0022 ,  H04W36/0072 ,  H04W36/0088 ,  H04W36/08 ,  H04W36/14

Abstract: A jitter buffer in a Voice over LTE receiver may be influenced by radio level feedback (RLF) from both local and remote endpoints to preemptively adjust the jitter buffer delay in anticipation of predicted future losses that have a high probability of occurring. The radio events of the RLF and the scenarios that trigger the preemptive adjustments may be identified, and their use may be expressed in terms of mathematical formulas. In prior art designs, the instantaneous jitter is derived from a weighted history of the media stream, and consequently only packets that have already arrived are used to compute the instantaneous jitter to adjust the length of the buffer. By providing and using RLF from both local and remote endpoints, the anticipated delay—for packets that have not yet arrived—may be used to preemptively adjust the buffer, thereby minimizing packet loss without introducing unnecessary delay.

Abstract translation: 在LTE语音接收机中的抖动缓冲器可能受来自本地和远端端点的无线电电平反馈（RLF）的影响，以预先考虑具有高概率发生的预测未来损耗的抖动缓冲器延迟。 可以识别RLF的无线电事件和触发抢先调整的场景，并且可以用数学公式来表示它们的使用。 在现有技术的设计中，瞬时抖动是从媒体流的加权历史导出的，因此只有已经到达的分组被用于计算瞬时抖动以调整缓冲器的长度。 通过从本地端点和远端端点提供和使用RLF，对于尚未到达的数据包，预期的延迟可能被用于抢先调整缓冲区，从而最大限度地减少数据包丢失而不引入不必要的延迟。

公开(公告)号：US20150351060A1

公开(公告)日：2015-12-03

申请号：US14821144

申请日：2015-08-07

Applicant: Apple Inc.

Inventor： Luciano M. Verger ,  Madhusudan Chaudhary ,  Onur E. Tackin ,  Oren M. Elrad ,  Srinivasan Vasudevan ,  Thanigaivelu Elangovan ,  Tiange Shao

IPC: H04W56/00 ,  H04L1/20 ,  H04W36/08

CPC classification number: H04W56/003 ,  H04J3/0632 ,  H04L1/203 ,  H04L1/205 ,  H04L29/06027 ,  H04L65/80 ,  H04L67/322 ,  H04W36/0022 ,  H04W36/0072 ,  H04W36/0088 ,  H04W36/08 ,  H04W36/14

Abstract: A jitter buffer in a Voice over LTE receiver may be influenced by radio level feedback (RLF) from both local and remote endpoints to preemptively adjust the jitter buffer delay in anticipation of predicted future losses that have a high probability of occurring. The radio events of the RLF and the scenarios that trigger the preemptive adjustments may be identified, and their use may be expressed in terms of mathematical formulas. Previously, the instantaneous jitter was derived from a weighted history of the media stream, and consequently only packets that had already been received were used to compute the instantaneous jitter to adjust the length of the buffer. By providing and using RLF from both local and remote endpoints, the anticipated delay—for packets that have not yet arrived—may be used to preemptively adjust the buffer, thereby minimizing packet loss without introducing unnecessary delay.

Abstract translation: 在LTE语音接收机中的抖动缓冲器可能受来自本地和远端端点的无线电电平反馈（RLF）的影响，以预先考虑具有高概率发生的预测未来损耗的抖动缓冲器延迟。 可以识别RLF的无线电事件和触发抢先调整的场景，并且可以用数学公式来表示它们的使用。 以前，瞬时抖动是从媒体流的加权历史得出的，因此只有已经接收到的数据包被用于计算瞬时抖动以调整缓冲器的长度。 通过从本地端点和远端端点提供和使用RLF，对于尚未到达的数据包，预期的延迟可能被用于抢先调整缓冲区，从而最大限度地减少数据包丢失而不引入不必要的延迟。

公开(公告)号：US09554346B2

公开(公告)日：2017-01-24

申请号：US14821144

申请日：2015-08-07

Applicant: Apple Inc.

Inventor： Luciano M. Verger ,  Madhusudan Chaudhary ,  Onur E. Tackin ,  Oren M. Elrad ,  Srinivasan Vasudevan ,  Thanigaivelu Elangovan ,  Tiange Shao

IPC: H04L1/00 ,  H04W56/00 ,  H04W36/08 ,  H04W36/00 ,  H04J3/06 ,  H04L1/20 ,  H04L29/06 ,  H04W36/14 ,  H04L29/08

CPC classification number: H04W56/003 ,  H04J3/0632 ,  H04L1/203 ,  H04L1/205 ,  H04L29/06027 ,  H04L65/80 ,  H04L67/322 ,  H04W36/0022 ,  H04W36/0072 ,  H04W36/0088 ,  H04W36/08 ,  H04W36/14

Abstract: A jitter buffer in a Voice over LTE receiver may be influenced by radio level feedback (RLF) from both local and remote endpoints to preemptively adjust the jitter buffer delay in anticipation of predicted future losses that have a high probability of occurring. The radio events of the RLF and the scenarios that trigger the preemptive adjustments may be identified, and their use may be expressed in terms of mathematical formulas. Previously, the instantaneous jitter was derived from a weighted history of the media stream, and consequently only packets that had already been received were used to compute the instantaneous jitter to adjust the length of the buffer. By providing and using RLF from both local and remote endpoints, the anticipated delay—for packets that have not yet arrived—may be used to preemptively adjust the buffer, thereby minimizing packet loss without introducing unnecessary delay.

Abstract translation: 在LTE语音接收机中的抖动缓冲器可能受来自本地和远端端点的无线电电平反馈（RLF）的影响，以预先考虑具有高概率发生的预测未来损耗的抖动缓冲器延迟。 可以识别RLF的无线电事件和触发抢先调整的场景，并且可以用数学公式来表示它们的使用。 以前，瞬时抖动是从媒体流的加权历史得出的，因此只有已经接收到的数据包被用于计算瞬时抖动以调整缓冲器的长度。 通过从本地端点和远端端点提供和使用RLF，对于尚未到达的数据包，预期的延迟可能被用于抢先调整缓冲区，从而最大限度地减少数据包丢失而不引入不必要的延迟。

公开(公告)号：US20130332156A1

公开(公告)日：2013-12-12

申请号：US13775100

申请日：2013-02-22

Applicant: APPLE INC.

Inventor： Onur Ergin Tackin ,  Sinan Karahan ,  Lalin S. Theverapperuma ,  Tiange Shao ,  Haining Zhang ,  Arun G. Mathias

IPC: H04R29/00 ,  G10L21/0216

CPC classification number: H04R29/004 ,  G10L21/0216 ,  G10L25/78 ,  H03G3/3005 ,  H03G3/3089 ,  H04M1/6008 ,  H04M1/6041 ,  H04M2250/12 ,  H04R3/005 ,  H04R3/02 ,  H04R2499/11

Abstract: The disclosed system and method for a mobile device combines information derived from onboard sensors with conventional signal processing information derived from a speech or audio signal to assist in noise and echo cancellation. In some implementations, an Angle and Distance Processing (ADP) module is employed on a mobile device and configured to provide runtime angle and distance information to an adaptive beamformer for canceling noise signals, provides a means for building a table of filter coefficients for adaptive filters used in echo cancellation, provides faster and more accurate Automatic Gain Control (AGC), provides delay information for a classifier in a Voice Activity Detector (VAD), provides a means for automatic switching between a speakerphone and handset mode of the mobile device, or primary microphone and reference microphones and assists in separating echo path changes from double talk.

Abstract translation: 所公开的用于移动设备的系统和方法将从车载传感器获得的信息与从语音或音频信号导出的常规信号处理信息相结合，以帮助噪声和回波消除。 在一些实现中，在移动设备上采用角度和距离处理（ADP）模块，并且被配置为向自适应波束形成器提供运行时间角度和距离信息以消除噪声信号，提供用于建立自适应滤波器的滤波器系数表的装置 用于回声消除，提供更快更准确的自动增益控制（AGC），为语音活动检测器（VAD）中的分类器提供延迟信息，提供了在移动设备的免提电话和手机模式之间自动切换的手段，或 主麦克风和参考麦克风，有助于将回声路径变化与双方通话分离。

公开(公告)号：US09882818B2

公开(公告)日：2018-01-30

申请号：US14500059

申请日：2014-09-29

Applicant: Apple Inc.

Inventor： Tiange Shao ,  Onur E. Tackin ,  Oren M. Elrad

IPC: H04L1/00 ,  H04L12/26 ,  H04L12/853 ,  H04W28/02 ,  H04L12/875 ,  H04L12/841 ,  H04L29/06 ,  H04W4/00

CPC classification number: H04L47/2416 ,  H04L43/0835 ,  H04L43/087 ,  H04L47/283 ,  H04L47/564 ,  H04L65/608 ,  H04L65/80 ,  H04W4/80 ,  H04W28/0236

Abstract: This disclosure relates to adjusting a jitter buffer at a wireless device based on inter-arrival-jitter (IAJ). In one embodiment, an IAJ value may be calculated for each of multiple received packets. An IAJ distribution may be generated for the received packets. A target packet loss rate may be determined. A quality of service value for IAJ distributions corresponding to the target packet loss rate may be determined. A de-jitter delay value may be calculated based on the IAJ distribution and the quality of service value for IAJ distributions. The de-jitter delay value may be used to adjust the jitter buffer at the wireless device.

公开(公告)号：US20140362830A1

公开(公告)日：2014-12-11

申请号：US14293494

申请日：2014-06-02

Applicant: Apple Inc.

Inventor： Luciano M. Verger ,  Madhusudan Chaudhary ,  Onur E. Tackin ,  Oren M. Elrad ,  Srinivasan Vasudevan ,  Thanigaivelu Elangovan ,  Tiange Shao

IPC: H04W56/00 ,  H04W36/00

CPC classification number: H04W56/003 ,  H04J3/0632 ,  H04L1/203 ,  H04L1/205 ,  H04L29/06027 ,  H04L65/80 ,  H04L67/322 ,  H04W36/0022 ,  H04W36/0072 ,  H04W36/0088 ,  H04W36/08 ,  H04W36/14

Abstract: A jitter buffer in a Voice over LTE receiver may be influenced by radio level feedback (RLF) from both local and remote endpoints to preemptively adjust the jitter buffer delay in anticipation of predicted future losses that have a high probability of occurring. The radio events of the RLF and the scenarios that trigger the preemptive adjustments may be identified, and their use may be expressed in terms of mathematical formulas. In prior art designs, the instantaneous jitter is derived from a weighted history of the media stream, and consequently only packets that have already arrived are used to compute the instantaneous jitter to adjust the length of the buffer. By providing and using RLF from both local and remote endpoints, the anticipated delay—for packets that have not yet arrived—may be used to preemptively adjust the buffer, thereby minimizing packet loss without introducing unnecessary delay.

Abstract translation: 在LTE语音接收机中的抖动缓冲器可能受来自本地和远端端点的无线电电平反馈（RLF）的影响，以预先考虑具有高概率发生的预测未来损耗的抖动缓冲器延迟。 可以识别RLF的无线电事件和触发抢先调整的场景，并且可以用数学公式来表示它们的使用。 在现有技术的设计中，瞬时抖动是从媒体流的加权历史导出的，因此只有已经到达的分组被用于计算瞬时抖动以调整缓冲器的长度。 通过从本地端点和远端端点提供和使用RLF，对于尚未到达的数据包，预期的延迟可能被用于抢先调整缓冲区，从而最大限度地减少数据包丢失而不引入不必要的延迟。