公开(公告)号：US07843818B2

公开(公告)日：2010-11-30

申请号：US11356935

申请日：2006-02-17

申请人： Lon-Chan Chu ,  Ido M. Ben-Shachar ,  Ivan J. Leichtling ,  Leonard Alan Collins ,  Claus T. Giloi ,  Yikang Xu

发明人： Lon-Chan Chu ,  Ido M. Ben-Shachar ,  Ivan J. Leichtling ,  Leonard Alan Collins ,  Claus T. Giloi ,  Yikang Xu

IPC分类号： H04L12/28 ,  H04N5/04

CPC分类号： H04L65/80 ,  H04L12/1827 ,  H04L29/06027 ,  H04L47/2416 ,  H04L47/32 ,  H04L65/4038 ,  H04N7/152 ,  H04N21/23406 ,  H04N21/44004

摘要： In order to minimize the delay of the video images viewed by a network conference attendee, an intelligent buffering process (IB process) selectively discards video frames from at least one point, and in an embodiment, many network points, such as at “in” and/or “out” buffers of clients, servers, routers, etc. Packets of video frame data arrive at a buffer, which can fill to a predetermined limit if the packets cannot be forwarded due to delays or slow connections. To forward the most current video images, old frames in the buffer are discarded rather than forwarded. In a particular embodiment, when the buffer is full, the next arriving delta frame packet is discarded. To avoid distortion, each subsequent delta frame is discarded until a new key frame eventually arrives. If the buffer is still full when the key frame arrives, the buffer is purged and the new key frame is added.

摘要翻译： 为了最小化由网络会议参加者观看的视频图像的延迟，智能缓冲处理（IB处理）从至少一个点选择性地丢弃视频帧，并且在一个实施例中，许多网络点，诸如“in” 和/或“输出”缓冲器，视频帧数据的数据包到达缓冲区，如果分组由于延迟或慢速连接而不能转发，则可以填充到预定的限制。 要转发最新的视频图像，缓冲区中的旧帧将被丢弃而不是转发。 在特定实施例中，当缓冲器已满时，丢弃下一个到达的增量帧分组。 为了避免失真，每个随后的增量帧被丢弃，直到新的关键帧最终到达。 如果关键帧到达缓冲区仍然满，则清除缓冲区并添加新的关键帧。

公开(公告)号：US07133362B2

公开(公告)日：2006-11-07

申请号：US09992731

申请日：2001-11-14

申请人： Lon-Chan Chu ,  Ido Ben-Shachar ,  Ivan J. Leichtling ,  Leonard Alan Collins ,  Claus T. Giloi ,  Yikang Xu

发明人： Lon-Chan Chu ,  Ido Ben-Shachar ,  Ivan J. Leichtling ,  Leonard Alan Collins ,  Claus T. Giloi ,  Yikang Xu

IPC分类号： G01R31/08 ,  H04L12/28

CPC分类号： H04L65/80 ,  H04L12/1827 ,  H04L29/06027 ,  H04L47/2416 ,  H04L47/32 ,  H04L65/4038 ,  H04N7/152 ,  H04N21/23406 ,  H04N21/44004

摘要： In order to minimize the delay of the video images viewed by a network conference attendee, an intelligent buffering process (IB process) selectively discards video frames from at least one point, and in an embodiment, many network points, such as at “in” and/or “out” buffers of clients, servers, routers, etc. Packets of video frame data arrive at a buffer, which can fill to a predetermined limit if the packets cannot be forwarded due to delays or slow connections. To forward the most current video images, old frames in the buffer are discarded rather than forwarded. In a particular embodiment, when the buffer is full, the next arriving delta frame packet is discarded. To avoid distortion, each subsequent delta frame is discarded until a new key frame eventually arrives. If the buffer is still full when the key frame arrives, the buffer is purged and the new key frame is added.

摘要翻译： 为了最小化由网络会议参加者观看的视频图像的延迟，智能缓冲处理（IB处理）从至少一个点选择性地丢弃视频帧，并且在一个实施例中，许多网络点，诸如“in” 和/或“输出”缓冲器，视频帧数据的数据包到达缓冲区，如果分组由于延迟或慢速连接而不能转发，则可以填充到预定的限制。 要转发最新的视频图像，缓冲区中的旧帧将被丢弃而不是转发。 在特定实施例中，当缓冲器已满时，丢弃下一个到达的增量帧分组。 为了避免失真，每个随后的增量帧被丢弃，直到新的关键帧最终到达。 如果关键帧到达缓冲区仍然满，则清除缓冲区并添加新的关键帧。

公开(公告)号：US20090164648A1

公开(公告)日：2009-06-25

申请号：US12356096

申请日：2009-01-20

申请人： Yikang Xu ,  Leonard Alan Collins ,  Lon-Chan Chu

发明人： Yikang Xu ,  Leonard Alan Collins ,  Lon-Chan Chu

IPC分类号： G06F15/16

CPC分类号： H04L12/1822 ,  H04L12/1868

摘要： Conferencing data is reliably delivered to computer systems participating in a hierarchically arranged multi-cast conferencing session. When a child computer system does not receive a multi-cast packet (e.g., an IP multi-cast packet), the child computer system sends a negative acknowledgment to a parent computer system. In response, the parent computer system re-transmits conferencing data that was contained in the multi-cast packet to the child computer system. Conferencing data can be re-transmitted to the child computer system via uni-cast (e.g., TCP). Accordingly, conferencing data that is not received or that is damaged via multi-cast can be repaired via uni-cast. Computer systems can join an existing multi-cast conference session without having to communicate with the root computer system. The root computer system adjusts a multi-cast send rate to compensate for changed network conditions.

摘要翻译： 会议数据可靠地传递给参与分层安排的多播会议会话的计算机系统。 当子计算机系统不接收多播分组（例如，IP多播分组）时，子计算机系统向父计算机系统发送否定确认。 作为响应，父计算机系统将包含在多播包中的会议数据重新发送到子计算机系统。 可以通过单播（例如TCP）将会议数据重新发送到子计算机系统。 因此，可以通过单播来修复未被接收或被多播损坏的会议数据。 计算机系统可以加入现有的多播会议会话，而无需与根计算机系统进行通信。 根计算机系统调整多播发送速率以补偿已更改的网络条件。

公开(公告)号：US07227864B2

公开(公告)日：2007-06-05

申请号：US10024090

申请日：2001-12-17

申请人： Leonard Alan Collins ,  Kristofer Noel Iverson ,  Lon-Chan Chu ,  Yikang Xu ,  Xin Liu

发明人： Leonard Alan Collins ,  Kristofer Noel Iverson ,  Lon-Chan Chu ,  Yikang Xu ,  Xin Liu

IPC分类号： H04L12/56

CPC分类号： H04L63/029 ,  H04L29/12009 ,  H04L29/12509 ,  H04L29/12537 ,  H04L29/12924 ,  H04L61/2567 ,  H04L61/2578 ,  H04L61/6063 ,  H04L67/104 ,  H04L67/14 ,  H04L69/329

摘要： Disclosed are methods that enable communications to be established regardless of the presence of communications blockers, e.g., firewalls and NATs, in the path between two computing devices. Two devices each establish communications with a rendezvous service. Through the service, the devices signal each other to set up direct, peer-to-peer communications between themselves. If the devices fail to establish direct communications, then they invoke a relay service that provides the illusion of direct communications. In another aspect, an originating device attempts to establish communications with a recipient, using an address and port number associated with the recipient. If that attempts fails, possibly because a firewall is blocking communications, then the originating device retries using a port normally held open by firewalls. If this attempt also fails, then the originating device invokes the services of a proxy to negotiate a port acceptable for use by the recipient and by any intervening firewalls.

摘要翻译： 公开了能够建立通信的方法，而不管在两个计算设备之间的路径中是否存在通信阻塞器，例如防火墙和NAT。 两个设备各自建立与会合服务的通信。 通过服务，设备相互信号，建立起彼此直接的对等通信。 如果设备无法建立直接通信，则调用中继服务，提供直接通信的错觉。 在另一方面，始发设备尝试使用与接收者相关联的地址和端口号与接收者建立通信。 如果尝试失败，可能是因为防火墙阻止通信，则始发设备将使用通常由防火墙打开的端口重试。 如果此尝试也失败，则始发设备调用代理服务以协商一个可接受的端口以供任何中间的防火墙使用。

公开(公告)号：US20120150982A1

公开(公告)日：2012-06-14

申请号：US13398422

申请日：2012-02-16

申请人： Yikang Xu ,  Leonard Alan Collins ,  Lon-Chan Chu

发明人： Yikang Xu ,  Leonard Alan Collins ,  Lon-Chan Chu

IPC分类号： G06F15/16

CPC分类号： H04L12/1822 ,  H04L12/1868

摘要： Conferencing data is reliably delivered to computer systems participating in a hierarchically arranged multi-cast conferencing session. When a child computer system does not receive a multi-cast packet (e.g., an IP multi-cast packet), the child computer system sends a negative acknowledgment to a parent computer system. In response, the parent computer system re-transmits conferencing data that was contained in the multi-cast packet to the child computer system. Conferencing data can be re-transmitted to the child computer system via uni-cast (e.g., TCP). Accordingly, conferencing data that is not received or that is damaged via multi-cast can be repaired via uni-cast. Computer systems can join an existing multi-cast conference session without having to communicate with the root computer system. The root computer system adjusts a multi-cast send rate to compensate for changed network conditions.

摘要翻译： 会议数据可靠地传递给参与分层安排的多播会议会话的计算机系统。 当子计算机系统不接收多播分组（例如，IP多播分组）时，子计算机系统向父计算机系统发送否定确认。 作为响应，父计算机系统将包含在多播包中的会议数据重新发送到子计算机系统。 可以通过单播（例如TCP）将会议数据重新发送到子计算机系统。 因此，可以通过单播来修复未被接收或被多播损坏的会议数据。 计算机系统可以加入现有的多播会议会话，而无需与根计算机系统进行通信。 根计算机系统调整多播发送速率以补偿已更改的网络条件。

公开(公告)号：US08140700B2

公开(公告)日：2012-03-20

申请号：US12356096

申请日：2009-01-20

申请人： Yikang Xu ,  Leonard Alan Collins ,  Lon-Chan Chu

发明人： Yikang Xu ,  Leonard Alan Collins ,  Lon-Chan Chu

IPC分类号： G06F15/16

CPC分类号： H04L12/1822 ,  H04L12/1868

摘要： Conferencing data is reliably delivered to computer systems participating in a hierarchically arranged multi-cast conferencing session. When a child computer system does not receive a multi-cast packet (e.g., an IP multi-cast packet), the child computer system sends a negative acknowledgment to a parent computer system. In response, the parent computer system re-transmits conferencing data that was contained in the multi-cast packet to the child computer system. Conferencing data can be re-transmitted to the child computer system via uni-cast (e.g., TCP). Accordingly, conferencing data that is not received or that is damaged via multi-cast can be repaired via uni-cast. Computer systems can join an existing multi-cast conference session without having to communicate with the root computer system. The root computer system adjusts a multi-cast send rate to compensate for changed network conditions.

摘要翻译： 会议数据可靠地传递给参与分层安排的多播会议会话的计算机系统。 当子计算机系统不接收多播分组（例如，IP多播分组）时，子计算机系统向父计算机系统发送否定确认。 作为响应，父计算机系统将包含在多播包中的会议数据重新发送到子计算机系统。 可以通过单播（例如TCP）将会议数据重新发送到子计算机系统。 因此，可以通过单播来修复未被接收或被多播损坏的会议数据。 计算机系统可以加入现有的多播会议会话，而无需与根计算机系统进行通信。 根计算机系统调整多播发送速率以补偿已更改的网络条件。

公开(公告)号：US20070192412A1

公开(公告)日：2007-08-16

申请号：US11739174

申请日：2007-04-24

申请人： Yikang Xu ,  Leonard Collins ,  Lon-Chan Chu

发明人： Yikang Xu ,  Leonard Collins ,  Lon-Chan Chu

IPC分类号： G06F15/16

CPC分类号： H04L12/1822 ,  H04L12/1868

摘要： Conferencing data is reliably delivered to computer systems participating in a hierarchically arranged multi-cast conferencing session. When a child computer system does not receive a multi-cast packet (e.g., an IP multi-cast packet), the child computer system sends a negative acknowledgment to a parent computer system. In response, the parent computer system re-transmits conferencing data that was contained in the multi-cast packet to the child computer system. Conferencing data can be re-transmitted to the child computer system via uni-cast (e.g., TCP). Accordingly, conferencing data that is not received or that is damaged via multi-cast can be repaired via uni-cast. Computer systems can join an existing multi-cast conference session without having to communicate with the root computer system. The root computer system adjusts a multi-cast send rate to compensate for changed network conditions.

摘要翻译： 会议数据可靠地传递给参与分层安排的多播会议会话的计算机系统。 当子计算机系统不接收多播分组（例如，IP多播分组）时，子计算机系统向父计算机系统发送否定确认。 作为响应，父计算机系统将包含在多播包中的会议数据重新发送到子计算机系统。 可以通过单播（例如TCP）将会议数据重新发送到子计算机系统。 因此，可以通过单播来修复未被接收或被多播损坏的会议数据。 计算机系统可以加入现有的多播会议会话，而无需与根计算机系统进行通信。 根计算机系统调整多播发送速率以补偿已更改的网络条件。

公开(公告)号：US20070198737A1

公开(公告)日：2007-08-23

申请号：US11739171

申请日：2007-04-24

申请人： Yikang Xu ,  Leonard Collins ,  Lon-Chan Chu

发明人： Yikang Xu ,  Leonard Collins ,  Lon-Chan Chu

IPC分类号： G06F15/16

CPC分类号： H04L12/1822 ,  H04L12/1868

摘要： Conferencing data is reliably delivered to computer systems participating in a hierarchically arranged multi-cast conferencing session. When a child computer system does not receive a multi-cast packet (e.g., an IP multi-cast packet), the child computer system sends a negative acknowledgment to a parent computer system. In response, the parent computer system re-transmits conferencing data that was contained in the multi-cast packet to the child computer system. Conferencing data can be re-transmitted to the child computer system via uni-cast (e.g., TCP). Accordingly, conferencing data that is not received or that is damaged via multi-cast can be repaired via uni-cast. Computer systems can join an existing multi-cast conference session without having to communicate with the root computer system. The root computer system adjusts a multi-cast send rate to compensate for changed network conditions.

公开(公告)号：US20070195807A1

公开(公告)日：2007-08-23

申请号：US11741084

申请日：2007-04-27

申请人： Leonard Collins ,  Kristofer Iverson ,  Lon-Chan Chu ,  Yikang Xu ,  Xin Liu

发明人： Leonard Collins ,  Kristofer Iverson ,  Lon-Chan Chu ,  Yikang Xu ,  Xin Liu

IPC分类号： H04L12/28

CPC分类号： H04L63/029 ,  H04L29/12009 ,  H04L29/12509 ,  H04L29/12537 ,  H04L29/12924 ,  H04L61/2567 ,  H04L61/2578 ,  H04L61/6063 ,  H04L67/104 ,  H04L67/14 ,  H04L69/329

摘要： Disclosed are methods that enable communications to be established regardless of the presence of communications blockers, e.g., firewalls and NATs, in the path between two computing devices. Two devices each establish communications with a rendezvous service. Through the service, the devices signal each other to set up direct, peer-to-peer communications between themselves. If the devices fail to establish direct communications, then they invoke a relay service that provides the illusion of direct communications. In another aspect, an originating device attempts to establish communications with a recipient, using an address and port number associated with the recipient. If that attempts fails, possibly because a firewall is blocking communications, then the originating device retries using a port normally held open by firewalls. If this attempt also fails, then the originating device invokes the services of a proxy to negotiate a port acceptable for use by the recipient and by any intervening firewalls.

摘要翻译： 公开了能够建立通信的方法，而不管在两个计算设备之间的路径中是否存在通信阻塞器，例如防火墙和NAT。 两个设备各自建立与会合服务的通信。 通过服务，设备相互信号，建立起彼此直接的对等通信。 如果设备无法建立直接通信，则调用中继服务，提供直接通信的错觉。 在另一方面，始发设备尝试使用与接收者相关联的地址和端口号与接收者建立通信。 如果尝试失败，可能是因为防火墙阻止通信，则始发设备将使用通常由防火墙打开的端口重试。 如果此尝试也失败，则始发设备调用代理服务以协商一个可接受的端口以供任何中间的防火墙使用。

公开(公告)号：US20060153217A1

公开(公告)日：2006-07-13

申请号：US11356935

申请日：2006-02-17

申请人： Lon-Chan Chu ,  Ido Ben-Shachar ,  Ivan Leichtling ,  Leonard Collins ,  Claus Giloi ,  Yikang Xu

发明人： Lon-Chan Chu ,  Ido Ben-Shachar ,  Ivan Leichtling ,  Leonard Collins ,  Claus Giloi ,  Yikang Xu

IPC分类号： H04L12/56 ,  H04L12/28

CPC分类号： H04L65/80 ,  H04L12/1827 ,  H04L29/06027 ,  H04L47/2416 ,  H04L47/32 ,  H04L65/4038 ,  H04N7/152 ,  H04N21/23406 ,  H04N21/44004

摘要： In order to minimize the delay of the video images viewed by a network conference attendee, an intelligent buffering process (IB process) selectively discards video frames from at least one point, and in an embodiment, many network points, such as at “in” and/or “out” buffers of clients, servers, routers, etc. Packets of video frame data arrive at a buffer, which can fill to a predetermined limit if the packets cannot be forwarded due to delays or slow connections. To forward the most current video images, old frames in the buffer are discarded rather than forwarded. In a particular embodiment, when the buffer is full, the next arriving delta frame packet is discarded. To avoid distortion, each subsequent delta frame is discarded until a new key frame eventually arrives. If the buffer is still full when the key frame arrives, the buffer is purged and the new key frame is added.