公开(公告)号：US07142533B2

公开(公告)日：2006-11-28

申请号：US10095375

申请日：2002-03-12

申请人： Ayman Ghobrial ,  Jerry Lynn Greer ,  Bruce Edward Mitchell ,  Paul Graves McElroy

发明人： Ayman Ghobrial ,  Jerry Lynn Greer ,  Bruce Edward Mitchell ,  Paul Graves McElroy

IPC分类号： H04L12/28 ,  H04L12/66 ,  H04B3/20 ,  H04M9/08

CPC分类号： H04L12/5601 ,  H04L2012/5656 ,  H04L2012/5671 ,  H04Q11/04 ,  H04Q2213/13034 ,  H04Q2213/1319 ,  H04Q2213/1329 ,  H04Q2213/13292

摘要： A cascaded signal processing arrangement processes digitally encoded voice samples transported over a time division multiplex (TDM) communication path for application to a processor-controlled digital communication device, in particular an integrated access device. Processed voice samples are packetized in accordance with an encapsulating protocol and transmitted as a packetized voice output stream to a destination receiver device. The arrangement includes an echo canceller coupled to the TDM communication path and performing echo cancellation processing on the digitally encoded voice samples. The echo cancellation-processed voice sample signals are compressed by a data compression operator and applied to a packet encapsulating host processor via the TDM communication path. This obviates the necessity of the host processor having to use data bus cycles to download processed digitized voice samples.