公开(公告)号：US20150163276A1

公开(公告)日：2015-06-11

申请号：US14625890

申请日：2015-02-19

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Thomas D. Greenslade ,  Guy C. Leaver ,  Murlin H. Coffey, III ,  Ian D. Hughes ,  Jason Cresswell

IPC: H04L29/06 ,  H04N7/15

CPC classification number: H04L65/605 ,  H04L12/1881 ,  H04L65/1089 ,  H04N7/15

Abstract: Multicast media notifications are provided when unicast media encoders are unavailable to serve endpoints that send a communication session request to a call control device. When the call control device receives a communication session request from an endpoint, a determination is made as to whether any one of a plurality of unicast media encoders is available for the communication session request. When it is determined that none of the plurality of unicast media encoders is available, the endpoint is connected to a multicast media encoder that presents a multicast media notification to the endpoint. The multicast media encoder generates a video keyframe associated with the multicast media notification, synchronizes the video keyframe to a starting point of audio, and outputs the synchronized video keyframe.

Abstract translation: 当单播媒体编码器不可用于向呼叫控制设备发送通信会话请求的端点时，提供组播媒体通知。 当呼叫控制设备从端点接收通信会话请求时，确定多个单播媒体编码器中的任一个是否可用于通信会话请求。 当确定多个单播媒体编码器中没有一个可用时，该端点连接到向端点呈现组播媒体通知的多播媒体编码器。 多媒体媒体编码器生成与组播媒体通知相关联的视频关键帧，将视频关键帧同步到音频起点，并输出同步的视频关键帧。

公开(公告)号：US09544349B2

公开(公告)日：2017-01-10

申请号：US14625890

申请日：2015-02-19

Applicant: Cisco Technology, Inc.

Inventor： Thomas D. Greenslade ,  Guy C. Leaver ,  Murlin H. Coffey, III ,  Ian D. Hughes ,  Jason Cresswell

IPC: H04L12/16 ,  H04L29/06 ,  H04L12/18 ,  H04N7/15

CPC classification number: H04L65/605 ,  H04L12/1881 ,  H04L65/1089 ,  H04N7/15

Abstract: Multicast media notifications are provided when unicast media encoders are unavailable to serve endpoints that send a communication session request to a call control device. When the call control device receives a communication session request from an endpoint, a determination is made as to whether any one of a plurality of unicast media encoders is available for the communication session request. When it is determined that none of the plurality of unicast media encoders is available, the endpoint is connected to a multicast media encoder that presents a multicast media notification to the endpoint. The multicast media encoder generates a video keyframe associated with the multicast media notification, synchronizes the video keyframe to a starting point of audio, and outputs the synchronized video keyframe.

Abstract translation: 当单播媒体编码器不可用于向呼叫控制设备发送通信会话请求的端点时，提供组播媒体通知。 当呼叫控制设备从端点接收通信会话请求时，确定多个单播媒体编码器中的任一个是否可用于通信会话请求。 当确定多个单播媒体编码器中没有一个可用时，该端点连接到向端点呈现组播媒体通知的多播媒体编码器。 多媒体媒体编码器生成与组播媒体通知相关联的视频关键帧，将视频关键帧同步到音频起点，并输出同步的视频关键帧。