公开(公告)号：US06760309B1

公开(公告)日：2004-07-06

申请号：US09535769

申请日：2000-03-28

申请人： Haim Rochberger ,  Gad Azriel ,  Sarit Shani Natanson

发明人： Haim Rochberger ,  Gad Azriel ,  Sarit Shani Natanson

IPC分类号： H04J314

CPC分类号： H04L65/1009 ,  H04L29/06027 ,  H04L47/10 ,  H04L47/11 ,  H04L47/2416 ,  H04L47/2441 ,  H04L47/2458 ,  H04L47/286 ,  H04L65/80

摘要： An apparatus for and a method of dynamically prioritizing packets over a packet based network. Packets are dynamically prioritized on the basis of their ‘time to live’ in the network as they travel from one network entity to another. Packets are assigned a priority in accordance with how ‘old’ or ‘young’ they are. Packets with a relatively long time left to live are assigned lower priority then those with relatively little time left to live. A time to live (TTL) field is added to the packet as it travels from one network entity to another. The contents of the time to live (TTL) field represents how ‘young’ or ‘old’ the packet is and conveys the time left before the packet is no longer of any use. Each network entity that receives the packet with a TTL field, subtracts from it the time the packet spends passing through that entity. The field decreases as it hops from network entity to entity until it reaches its destination or is discarded.

摘要翻译： 一种用于基于分组的网络动态地优先分组分组的装置和方法。 基于他们从一个网络实体到另一个网络实体的网络的“居住时间”，动态优先分组。 按照“旧”或“年轻”分配优先级。 具有相对较长时间的分组被分配到较低的优先级，那些相对较少的时间剩下的生活。 当数据包从一个网络实体传播到另一个网络实体时，生存时间（TTL）字段被添加到数据包中。 生活时间（TTL）字段的内容表示数据包的“年轻”或“旧”，并传达了数据包不再有任何用途之前的时间。 接收TTL字段的数据包的每个网络实体，在数据包通过该实体的时间内从其中减去。 该字段从网络实体跳到实体，直到到达目的地或被丢弃为止。

公开(公告)号：US06724736B1

公开(公告)日：2004-04-20

申请号：US09570333

申请日：2000-05-12

申请人： Gad Azriel

发明人： Gad Azriel

IPC分类号： H04B320

CPC分类号： H04M7/006 ,  H04B3/23 ,  H04L65/80 ,  H04L2012/6491 ,  H04M3/002 ,  H04M9/082

摘要： An apparatus for and a method of remote echo cancellation in a packet based telephony system. Echo cancellation algorithms normally performed on the local end of a connection, are performed instead by the remote end of the connection. Alternatively, the echo cancellation algorithms are performed for both the local and remote ends of a connection on a remote device. In the former case, the remote endpoint estimates the echo function of the local endpoint using audio and timing synchronization data corresponding to the actual audio played at the local endpoint. Using this information, the remote endpoint is able to accurately perform echo cancellation.

摘要翻译： 用于基于分组的电话系统中的远程回波消除的装置和方法。 通常在连接的本端执行的回波消除算法是由连接的远端执行的。 或者，对远程设备上的连接的本地和远端都执行回波消除算法。 在前一种情况下，远程端点使用对应于在本地端点播放的实际音频的音频和定时同步数据来估计本地端点的回波函数。 使用该信息，远程端点能够准确地执行回声消除。

公开(公告)号：US07286652B1

公开(公告)日：2007-10-23

申请号：US09584581

申请日：2000-05-31

申请人： Gad Azriel ,  Yackov Sfadya

发明人： Gad Azriel ,  Yackov Sfadya

IPC分类号： H04M1/64 ,  H04L12/66 ,  G06F15/173

CPC分类号： H04L12/00 ,  H04L29/06 ,  H04L43/00 ,  H04L43/106

摘要： An apparatus for and a method of audio recording in packet based telephony systems. Using the present invention, the equivalent of four audio channels are recorded utilizing only two recording channels. Each channel recorded comprises the stream of packets generated and transmitted by each endpoint to the other side. The RTP packets include the samples generated by the particular endpoint in addition to the timestamp of the samples received from the other side actually played by the endpoint. The recording device has knowledge of what was played at the other endpoint in order to accurately playback the audio samples generated by and received from the other endpoint. The recording device receives a packet stream containing the audio generated on each endpoint and the timestamp of the packet from the other side that was played on the endpoint. The recording device can reconstruct from this data the audio signal that was actually played on each endpoint.

摘要翻译： 一种用于基于分组的电话系统中的音频记录装置和方法。 使用本发明，仅使用两个记录通道来记录相当于四个音频通道。 记录的每个通道包括由每个端点生成和发送到另一侧的分组流。 除了由端点实际播放的另一侧接收的样本的时间戳之外，RTP分组还包括由特定端点生成的采样。 记录装置知道在另一端点播放的内容，以便准确地回放由另一端点产生和接收的音频样本。 记录装置接收包含在每个端点上产生的音频的分组流和来自在端点上播放的另一侧的分组的时间戳。 记录装置可以从该数据重建实际在每个端点上播放的音频信号。