-
公开(公告)号：CA2247427C
公开(公告)日：2001-06-05
申请号：CA2247427
申请日：1997-01-24
Applicant: MOTOROLA INC
Inventor： ASHLEY JAMES PATRICK , PROCTOR LEE MICHAEL
Abstract: An apparatus (200) for providing a multi-party speech connection for use in a wireless communication system (10). The apparatus (200) comprises a first speech encoder (202) producing a first encoded speech signal, a second speec h encoder (20) producing a second encoded speech signal, a conference circuit (22), and a speech decoder (208) responsive to the conference circuit (22). The conference circuit (22) receives the first and second speech encoded signals and produces a multiplexed encoded speech signal. The speech decoder (208) receives the multiplexed encoded speech signal and produces a decoded speech signal.
-
公开(公告)号：BR9913200A
公开(公告)日：2001-05-15
申请号：BR9913200
申请日：1999-07-23
Applicant: MOTOROLA INC
Inventor： BROPHY JOHN DOUGLAS , ASHLEY JAMES PATRICK , PROCTOR LEE MICHAEL
Abstract: Vocoder bypass is provided using in-band signaling. In preferred embodiments of the present invention, three signaling channels are arranged for transmission within the compressed speech. Each of the signaling channels are communicated at a preferred rate to permit fast, reliable detection of conditions indicating vocoder bypass mode of operation, to negotiate suitable vocoder type if necessary, and to synchronize and communicate compressed speech in a vocoder bypass mode of operation.
-
公开(公告)号：BR9708166A
公开(公告)日：1999-07-27
申请号：BR9708166
申请日：1997-01-24
Applicant: MOTOROLA INC
Inventor： ASHLEY JAMES PATRICK , PROCTOR LEE MICHAEL
Abstract: An apparatus (200) for providing a multi-party speech connection for use in a wireless communication system (10). The apparatus (200) comprises a first speech encoder (202) producing a first encoded speech signal, a second speech encoder (20) producing a second encoded speech signal, a conference circuit (22), and a speech decoder (208) responsive to the conference circuit (22). The conference circuit (22) receives the first and second speech encoded signals and produces a multiplexed encoded speech signal. The speech decoder (208) receives the multiplexed encoded speech signal and produces a decoded speech signal.
-
-
公开(公告)号：FI961838A0
公开(公告)日：1996-04-30
申请号：FI961838
申请日：1996-04-30
Applicant: MOTOROLA INC
Inventor： SCRIBANO GINO ANTONY , PROCTOR LEE MICHAEL , NGUYEN QUOC VINH
Abstract: A method and apparatus for packet alignment in a simulcast system includes a communications controller (310) having a vocoder and an input/output (I/O) processor (313) controlling the vocoder (311), the I/O processor having a timing alignment control (315) and a packet counter (314) for inserting timing alignment tags in voice/data packets and adjusting packet numbering and timing based on alignment requests from a master radio communication unit. The communications controller is coupled to radio communication units (330, 340, 350), each having a packet buffer (331) and an alignment processor (332) which includes a packet number detector (333) for detecting the transmission timing tag and sending a request for a packet numbering adjustment to the communications controller and a timing alignment detector (334) for comparing a receive time of the first information packet and a predetermined preferential receive time and for sending a timing alignment request to the communications controller.
-
Patent Agency Ranking16.发明公开
公开(公告)号：EP1010278A4
公开(公告)日：2002-10-28
申请号：EP98921087
申请日：1998-05-08
Applicant: MOTOROLA INC
Inventor： PROCTOR LEE MICHAEL , ASHLEY JAMES PATRICK
CPC classification number: H04W28/20 , H04B2201/70703 , H04J3/1688 , H04W88/181
Abstract: A method and system for controlling speech encoding in a communication system utilizes feedback information such as packet modification control data (154) sent from a communication link output controller, such as a network arbitor (142). The network arbitor (142) sends the packet modification control data (154) to a selected vocoder (146) to change the filter states of the selected vocoder (146) when the network arbitor (142) modifies an output speech packet communicated of a communication link (20), to facilitate improved convergence of a speech encoder and a speech decoder, such as a mobile subscriber unit.
-
公开(公告)号：DE69942513D1
公开(公告)日：2010-07-29
申请号：DE69942513
申请日：1999-07-23
Applicant: MOTOROLA INC
Inventor： BROPHY JOHN DOUGLAS , PROCTOR LEE MICHAEL , ASHLEY JAMES PATRICK
-
-
公开(公告)号：SE515715C2
公开(公告)日：2001-10-01
申请号：SE9601585
申请日：1996-04-26
Applicant: MOTOROLA INC
Inventor： SCRIBANO GINO ANTHONY , PROCTOR LEE MICHAEL , NGUYEN QUOC VINH
Abstract: A method and apparatus for packet alignment in a simulcast system includes a communications controller (310) having a vocoder and an input/output (I/O) processor (313) controlling the vocoder (311), the I/O processor having a timing alignment control (315) and a packet counter (314) for inserting timing alignment tags in voice/data packets and adjusting packet numbering and timing based on alignment requests from a master radio communication unit. The communications controller is coupled to radio communication units (330, 340, 350), each having a packet buffer (331) and an alignment processor (332) which includes a packet number detector (333) for detecting the transmission timing tag and sending a request for a packet numbering adjustment to the communications controller and a timing alignment detector (334) for comparing a receive time of the first information packet and a predetermined preferential receive time and for sending a timing alignment request to the communications controller.
-
公开(公告)号：DE19580846C1
公开(公告)日：2000-11-16
申请号：DE19580846
申请日：1995-05-26
Applicant: MOTOROLA INC
Inventor： ASHLEY JAMES PATRICK , PROCTOR LEE MICHAEL
Abstract: A method and apparatus are provided for echo canceling which includes double-talk immunity. The echo canceller (15) according to the present invention includes a double-talk detector (17) which uses an adaptive double-talk detection threshold (214) and an accurate estimation of reference energy (106) to detect double-talk. The echo canceller further provides for correcting partial echo canceller adaptive filter vector divergence occurring prior to double-talk detection by maintaining and switching to an auxiliary echo canceller filter with known "good" filter coefficients (58, 60, 62).
-
-
-
-
-
-
-
-
-
Search Results
61
records
(took 0.02 seconds)
