公开(公告)号：US20150049248A1

公开(公告)日：2015-02-19

申请号：US14262994

申请日：2014-04-28

Applicant: QUALCOMM Incorporated

Inventor： Min Wang ,  Tien-Hsin Lee ,  Shankar Genesh LakshmanaSwamy ,  Andy Yu ,  Vikram Singh ,  Sandeep Padubidri Ramamurthy ,  Yau Mo Chan ,  Vasudev Sujir Nayak ,  Srinivasan Balasubramanian

IPC: H04L29/06 ,  H04N5/04

CPC classification number: H04L65/602 ,  H04J3/00 ,  H04L65/607 ,  H04L65/608 ,  H04L69/28 ,  H04N5/04 ,  H04N21/6437 ,  H04N21/8547

Abstract: Methods, systems, and devices are described for media synchronization. Multi-stream media processes may include media streams captured with respect to different clock rates. Multi-processor implementations may involve separate clocks associated with different media streams, such as audio and video, respectively. The separate clocks may tend to drift from one another, becoming further out of sync as time passes. Selecting a reference time of one of the processors to function as a “wall clock,” recording frame capture times with respect to the reference time, accounting for propagation delays, and transmitting frame capture times in terms of the reference time may aid in AV synchronization at a device where audio and video streams are received.

Abstract translation: 描述了媒体同步的方法，系统和设备。 多流媒体处理可以包括关于不同时钟速率捕获的媒体流。 多处理器实现可以分别涉及与不同媒体流（例如音频和视频）相关联的单独的时钟。 单独的时钟可能趋向于彼此漂移，随着时间的过去而变得更加不同步。 选择其中一个处理器作为“挂钟”的参考时间，相对于参考时间记录帧捕获时间，考虑传播延迟和根据参考时间传输帧捕获时间可以有助于AV同步 在接收音频和视频流的设备上。

公开(公告)号：US10085029B2

公开(公告)日：2018-09-25

申请号：US14805318

申请日：2015-07-21

Applicant: QUALCOMM Incorporated

Inventor： Sanjeev Mittal ,  Vikram Singh ,  Tien-Hsin Lee

IPC: H04N21/2343 ,  H04N19/154 ,  H04N19/107 ,  H04N19/112 ,  H04N19/114 ,  H04N19/136 ,  H04N19/159 ,  H04N19/172 ,  H04N19/177 ,  H04N19/44 ,  H04N19/503 ,  H04N19/593 ,  H04N7/14 ,  H04L29/06

CPC classification number: H04N19/154 ,  H04L65/1083 ,  H04L65/1096 ,  H04L65/608 ,  H04N7/141 ,  H04N7/147 ,  H04N19/107 ,  H04N19/112 ,  H04N19/114 ,  H04N19/136 ,  H04N19/159 ,  H04N19/172 ,  H04N19/177 ,  H04N19/44 ,  H04N19/503 ,  H04N19/593

Abstract: A system and method for performing video telephony (VT) is disclosed. In one example, there is provided an apparatus having a transceiver configured to receive VT data and information indicating a switch from a first display to a second display from a network. The apparatus also includes a decoder operatively coupled to the transceiver and configured to decode the VT data, a memory comprising a coded picture buffer (CPB) configured to store the decoded VT data, and a processor operatively coupled to the transceiver, the decoder, and the memory. The processor is configured to, in response to receiving the information indicating a switch from a first display to a second display, instruct the transceiver to transmit a request for an I-frame to the network.

公开(公告)号：US09674737B2

公开(公告)日：2017-06-06

申请号：US14830541

申请日：2015-08-19

Applicant: QUALCOMM Incorporated

Inventor： Ibrahim Hajj-Ahmad ,  Vikram Singh ,  Gary Chia-Jui Chang ,  Jyotirmoy Das ,  Tien-Hsin Lee ,  Sanjeev Mittal

IPC: H04N7/14 ,  H04W36/00 ,  H04L12/825 ,  H04L1/00 ,  H04W88/06

CPC classification number: H04W36/0055 ,  H04L1/0014 ,  H04L47/2416 ,  H04L47/25 ,  H04L47/26 ,  H04N7/147 ,  H04N2007/145 ,  H04W36/00 ,  H04W36/0011 ,  H04W36/14 ,  H04W88/06

Abstract: A system and method for rate-adaptation of a video telephony (VT) session is disclosed. In one example, there is provided a method that includes receiving a first information set indicative of a start of a handover of a device from a first Radio Access Technology (RAT) to a second RAT. The method further includes receiving a second information set indicative of an end of the handover. The method further includes adjusting a rate-adaptation protocol for the VT session based at least in part on the first and second information sets.

公开(公告)号：US09491669B1

公开(公告)日：2016-11-08

申请号：US14830541

申请日：2015-08-19

Applicant: QUALCOMM Incorporated

Inventor： Ibrahim Hajj-Ahmad ,  Vikram Singh ,  Gary Chia-Jui Chang ,  Jyotirmoy Das ,  Tien-Hsin Lee ,  Sanjeev Mittal

IPC: H04N7/14 ,  H04W36/00 ,  H04L12/825

Abstract: A system and method for rate-adaptation of a video telephony (VT) session is disclosed. In one example, there is provided a method that includes receiving a first information set indicative of a start of a handover of a device from a first Radio Access Technology (RAT) to a second RAT. The method further includes receiving a second information set indicative of an end of the handover. The method further includes adjusting a rate-adaptation protocol for the VT session based at least in part on the first and second information sets.

公开(公告)号：US09300713B2

公开(公告)日：2016-03-29

申请号：US14262994

申请日：2014-04-28

Applicant: QUALCOMM Incorporated

Inventor： Min Wang ,  Tien-Hsin Lee ,  Shankar Genesh LakshmanaSwamy ,  Andy Yu ,  Vikram Singh ,  Sandeep Padubidri Ramamurthy ,  Yau Mo Chan ,  Vasudev Sujir Nayak ,  Srinivasan Balasubramanian

IPC: H04L29/06 ,  H04N5/04 ,  H04J3/00 ,  H04N21/6437 ,  H04N21/8547

CPC classification number: H04L65/602 ,  H04J3/00 ,  H04L65/607 ,  H04L65/608 ,  H04L69/28 ,  H04N5/04 ,  H04N21/6437 ,  H04N21/8547

Abstract: Methods, systems, and devices are described for media synchronization. Multi-stream media processes may include media streams captured with respect to different clock rates. Multi-processor implementations may involve separate clocks associated with different media streams, such as audio and video, respectively. The separate clocks may tend to drift from one another, becoming further out of sync as time passes. Selecting a reference time of one of the processors to function as a “wall clock,” recording frame capture times with respect to the reference time, accounting for propagation delays, and transmitting frame capture times in terms of the reference time may aid in AV synchronization at a device where audio and video streams are received.

Abstract translation: 描述了媒体同步的方法，系统和设备。 多流媒体处理可以包括关于不同时钟速率捕获的媒体流。 多处理器实现可以分别涉及与不同媒体流（例如音频和视频）相关联的单独的时钟。 单独的时钟可能趋向于彼此漂移，随着时间的过去而变得更加不同步。 选择其中一个处理器作为“挂钟”的参考时间，相对于参考时间记录帧捕获时间，考虑传播延迟和根据参考时间传输帧捕获时间可以有助于AV同步 在接收音频和视频流的设备上。

公开(公告)号：US09398253B2

公开(公告)日：2016-07-19

申请号：US14257300

申请日：2014-04-21

Applicant: QUALCOMM Incorporated

Inventor： Tien-Hsin Lee ,  Min Wang ,  Radhika Agrawal ,  Vikram Singh ,  Nathan Allan Rickey

IPC: H04N7/14 ,  H04L29/06

CPC classification number: H04N7/147 ,  H04L29/06027 ,  H04L65/1083 ,  H04L65/608 ,  H04L65/80

Abstract: The disclosure relates to video telephony and, more particularly, to techniques for detecting a video pause in a video telephony application. In one example of the disclosure, a method for video telephony comprises detecting, at a receiving device, that video data packets associated with a video telephony call have stopped arriving from a sending device, and determining that the sending device has paused a video portion of the video telephony call based on information contained in video control packets.

Abstract translation: 本公开涉及视频电话，更具体地，涉及用于检测视频电话应用中的视频暂停的技术。 在本公开的一个示例中，视频电话的方法包括在接收设备处检测与视频电话呼叫相关联的视频数据分组已经从发送设备停止到达，并且确定发送设备已经暂停了视频电话的视频部分 基于视频控制包中包含的信息的视频电话呼叫。

公开(公告)号：US20150029303A1

公开(公告)日：2015-01-29

申请号：US14257300

申请日：2014-04-21

Applicant: QUALCOMM Incorporated

Inventor： Tien-Hsin Lee ,  Min Wang ,  Radhika Agrawal ,  Vikram Singh ,  Nathan Allan Rickey

IPC: H04N7/14

CPC classification number: H04N7/147 ,  H04L29/06027 ,  H04L65/1083 ,  H04L65/608 ,  H04L65/80

Abstract: The disclosure relates to video telephony and, more particularly, to techniques for detecting a video pause in a video telephony application. In one example of the disclosure, a method for video telephony comprises detecting, at a receiving device, that video data packets associated with a video telephony call have stopped arriving from a sending device, and determining that the sending device has paused a video portion of the video telephony call based on information contained in video control packets.

Abstract translation: 本公开涉及视频电话，更具体地，涉及用于检测视频电话应用中的视频暂停的技术。 在本公开的一个示例中，视频电话的方法包括在接收设备处检测与视频电话呼叫相关联的视频数据分组已经从发送设备停止到达，并且确定发送设备已经暂停了视频电话的视频部分 基于视频控制包中包含的信息的视频电话呼叫。

公开(公告)号：US10454811B2

公开(公告)日：2019-10-22

申请号：US15644206

申请日：2017-07-07

Applicant: QUALCOMM Incorporated

Inventor： Tien-Hsin Lee ,  Matthew Zivney ,  Manjunatha Kantharaju ,  Shankar Ganesh Lakshmanaswamy ,  Kirankumar Bhoja Anchan ,  Vasudev Nayak

IPC: H04L12/727 ,  G06F3/16 ,  H04L12/26 ,  H04L12/835

Abstract: An apparatus includes de-jitter buffer control circuitry configured to determine an arrival delay value based on previously received audio packets, to identify a receive time of a first audio packet of a talk spurt, to determine an offset value of the first audio packet based on the receive time and the arrival delay value, and to adjust a target delay value associated with a de-jitter buffer based on the offset value. The apparatus also includes a de-jitter buffer configured to buffer the first audio packet based on the adjusted target delay value.

公开(公告)号：US09736083B2

公开(公告)日：2017-08-15

申请号：US14860442

申请日：2015-09-21

Applicant: QUALCOMM Incorporated

Inventor： Min Wang ,  Arungundram Chandrasekaran Mahendran ,  Tien-Hsin Lee ,  Vikram Singh ,  Srinivasan Balasubramanian

IPC: H04L12/927 ,  H04L29/08 ,  H04L12/801 ,  H04L29/06

CPC classification number: H04L47/805 ,  H04L47/14 ,  H04L65/1006 ,  H04L65/1069 ,  H04L65/1089 ,  H04L65/80 ,  H04L67/322

Abstract: Techniques for setting up a packet-switched video telephony (PSVT) call are described. A mobile originated (MO) device may transmit an invitation for the PSVT call to a mobile terminated (MT) device. The invitation may initiate a process to reserve and identify video and audio resources to establish the PSVT call. The MO device may determine whether the video resources are available. If the video resources are not available but audio resources are available, the MO device may instead establish the PSVT call with only an audio stream call between the MO device and the MT device. If audio resources become available ahead of video resources, the PSVT call may be established with an audio stream first and a video stream is automatically added to the call when video resources are reserved later, or the PSVT call is downgraded to a VoIP call if the video resources cannot be reserved.

公开(公告)号：US20170055184A1

公开(公告)日：2017-02-23

申请号：US14830541

申请日：2015-08-19

Applicant: QUALCOMM Incorporated

Inventor： Ibrahim Hajj-Ahmad ,  Vikram Singh ,  Gary Chia-Jui Chang ,  Jyotirmoy Das ,  Tien-Hsin Lee ,  Sanjeev Mittal

IPC: H04W36/00 ,  H04L12/825 ,  H04N7/14

CPC classification number: H04W36/0055 ,  H04L1/0014 ,  H04L47/2416 ,  H04L47/25 ,  H04L47/26 ,  H04N7/147 ,  H04N2007/145 ,  H04W36/00 ,  H04W36/0011 ,  H04W36/14 ,  H04W88/06

Abstract: A system and method for rate-adaptation of a video telephony (VT) session is disclosed. In one example, there is provided a method that includes receiving a first information set indicative of a start of a handover of a device from a first Radio Access Technology (RAT) to a second RAT. The method further includes receiving a second information set indicative of an end of the handover. The method further includes adjusting a rate-adaptation protocol for the VT session based at least in part on the first and second information sets.

Abstract translation: 公开了一种用于视频电话（VT）会话的速率适配的系统和方法。 在一个示例中，提供了一种方法，包括：接收指示设备从第一无线电接入技术（RAT）到第二RAT的切换开始的第一信息集。 该方法还包括接收指示切换结束的第二信息集。 该方法还包括至少部分地基于第一和第二信息集来调整用于VT会话的速率适配协议。