Invention Grant
US07483451B2 Multi-media jitter removal in an asynchronous digital home network
有权
异步数字家庭网络中的多媒体抖动消除
- Patent Title: Multi-media jitter removal in an asynchronous digital home network
- Patent Title (中): 异步数字家庭网络中的多媒体抖动消除
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Application No.: US10333172Application Date: 2001-06-29
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Publication No.: US07483451B2Publication Date: 2009-01-27
- Inventor: Terry Wayne Lockridge , Thomas Edward Horlander , John William Richardson
- Applicant: Terry Wayne Lockridge , Thomas Edward Horlander , John William Richardson
- Applicant Address: FR Boulogne Billancourt
- Assignee: Thomson Licensing
- Current Assignee: Thomson Licensing
- Current Assignee Address: FR Boulogne Billancourt
- Agent Joseph J. Laks; Paul P. Kiel
- International Application: PCT/US01/20845 WO 20010629
- International Announcement: WO02/09331 WO 20020131
- Main IPC: H04J3/06
- IPC: H04J3/06

Abstract:
A method and an apparatus using a system level clocking scheme to remove jitter from multi-media packets distributed over an asynchronous network, in particular an asynchronous network. The present invention overcomes the problems associated with jitter introduced in an asynchronous network by using various time stamps to synchronize a client device clock to a headend clock and to control the data flow in the client device to match the rate that the data is received by a broadband receiver coupled to the headend. A first time stamp is prepended to the transport packets when the packets are received from the headend. A second time stamp is placed in the data frame when the data frame is placed on the network. A third time stamp is placed in the data frame when the data frame is received from the network. The second and third time stamps are used for synchronizing the client clock to the server clock, which is in turn frequency locked to the headend clock. The first time stamp is used for data flow control wherein the client controls the data flow to correspond to the rate the data is received at the server.
Public/Granted literature
- US20040090994A1 Multi-media jitter removal in an asynchronous digital home network Public/Granted day:2004-05-13
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