公开(公告)号：US08514459B2

公开(公告)日：2013-08-20

申请号：US12155791

申请日：2008-06-10

申请人： Teruki Mita ,  Yoshihiro Ariyama ,  Hiroaki Harada

发明人： Teruki Mita ,  Yoshihiro Ariyama ,  Hiroaki Harada

IPC分类号： H04N1/00 ,  H04N1/32

CPC分类号： H04M11/066

摘要： A communication device transmits voice and facsimile signals in the same channel between a terminal device and a packet network. The communication device has an echo canceler and a jitter buffer. The jitter buffer has a delay recovery control function that selectively deletes data from the jitter buffer to recover from packet delays. After detecting a facsimile tone, the communication device waits to detect a certain interval of silence, then deactivates its echo canceler and delay recovery control function and switches into facsimile communication mode. If a certain interval of silence is detected during the facsimile transmission, the communication device reactivates its echo canceler and delay recovery control function and continues communicating in voice mode if the line is left connected.

公开(公告)号：US20090009818A1

公开(公告)日：2009-01-08

申请号：US12155791

申请日：2008-06-10

申请人： Teruki Mita ,  Yoshihiro Ariyama ,  Hiroaki Harada

发明人： Teruki Mita ,  Yoshihiro Ariyama ,  Hiroaki Harada

IPC分类号： H04N1/00

CPC分类号： H04M11/066

摘要： A communication device transmits voice and facsimile signals in the same channel between a terminal device and a packet network. The communication device has an echo canceler and a jitter buffer. The jitter buffer has a delay recovery control function that selectively deletes data from the jitter buffer to recover from packet delays. After detecting a facsimile tone, the communication device waits to detect a certain interval of silence, then deactivates its echo canceler and delay recovery control function and switches into facsimile communication mode. If a certain interval of silence is detected during the facsimile transmission, the communication device reactivates its echo canceler and delay recovery control function and continues communicating in voice mode if the line is left connected.

摘要翻译： 通信设备在终端设备和分组网络之间的相同信道中发送语音和传真信号。 通信设备具有回波消除器和抖动缓冲器。 抖动缓冲区具有延迟恢复控制功能，可选择性地从抖动缓冲区中删除数据，从数据包延迟中恢复。 在检测到传真音后，通信设备等待检测到一定的静默间隔，然后停用其回波消除器和延迟恢复控制功能并切换到传真通信模式。 如果在传真传输期间检测到一定的间隔时间，则通信设备会重新激活其回波消除器和延迟恢复控制功能，如果线路保持连接，则继续以语音模式进行通信。