ITU J.121:2002

ITU J.121:2002 Quality Control Protocol For Webcasting Defines protocols between a server and a client in order to distribute sound and television programs by J.120, i.e. perform "webcasting", over a general IP network, which is a non-QoS guaranteed netwo

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Table of Contents

FOREWORD
CONTENTS
1Scope
2References
2.1Normativereferences
2.2Informativereferences
3Termsanddefinitions
4Abbreviationsandconventions
4.1Abbreviations
4.2Conventions
5Systemdefinition
5.1Procedurefortheserver
5.1.1Transmissionofmeasurementsupportinformation
5.1.2Receptionoftheclient'sreport
5.1.3Distributionofmediadata
5.2Procedurefortheclient
5.2.1Monitoringoftransmissionquality
5.2.2Transmissionoftheclient'sreporttotheserver
6DefinitionofaReportPacket
6.1SenderReport(SR)
6.2ReceiverReport(RR)
7RTCPtransmissioninterval
AppendixI-Algorithms
AppendixII-RTPheadervaliditychecks
AppendixIII-DeterminingthenumberofRTPpacketsexpectedand
lost
AppendixIV-ComputingtheRTCPtransmissioninterval
AppendixV-Estimatingtheinter-arrivaljitter

Abstract

Defines protocols between a server and a client in order to distribute sound and television programs by J.120, i.e. perform "webcasting", over a general IP network, which is a non-QoS guaranteed network where data error or packet losses may occur. Defines the kinds of parameters that a client should report to the server, as well as a transmission protocol that is used for sending the report from the client to the server. Also defines transmission of supporting parameters that are useful for the server to analyze the client's report.

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