Multicast RTP An Overview | Extron electronic 68-1998-01 REV. C

Multicast RTP — An Overview

Multicast RTP allows a source to be displayed on multiple displays. This method uses a real-time variation of UDP (User Datagram Protocol) called RTP (Real-time Transport Protocol).

RTP	Network	RTP
LAN-1	Network	LAN-1
LAN-2		LAN-2
STATUS		STATUS
VN-MATRIX 225 SERIES		VN-MATRIX 225 SERIES
RGB/DVI OVER IP		RGB/DVI OVER IP

Encoder sends data using RTP to a multicast group.

SOURCE

RTP

LAN-1

LAN-2

STATUS

VN-MATRIX 225 SERIES

RGB/DVI OVER IP

RTP

LAN-1

LAN-2

STATUS

VN-MATRIX 225 SERIES

RGB/DVI OVER IP

RTP

LAN-1

LAN-2

STATUS

VN-MATRIX 225 SERIES

RGB/DVI OVER IP

RTP

Multiple decoders can be part of the multicast group.

DISPLAYS

Figure 2. Multicast RTP Streaming

The source encoder uses RTP to send data to a multicast group. The source does not need to know the IP address of the decoders that are using the source.

RTP provides very low latency which is important for video streaming. Unlike other protocols, RTP packets include a time stamp. If packets are received in the wrong order, they are sorted into the correct order for display or discarded if the time stamp is out-of-date.

However, because RTP is a connectionless protocol, data delivery is not guaranteed. When data packets are lost (for example, due to excessive network traffic), the VN-Matrix 200 / 225 / 300 / 325 devices carefully manage the data stream to minimize any image disruption.

VNM Recorder • Introduction

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Extron electronic 68-1998-01 REV. C manual Multicast RTP An Overview, Multicast RTP Streaming

Contents

User Guide Safety Instructions Specifications Availability FCC Class a Notice Conventions Used in this Guide Contents Reference Information About this Guide About the VNM Recorder Overview of Recorded Streams Overview of Stream Playback About RAID5 Storage Transport Protocols Used for StreamingDecoder device Multicast RTP An Overview Multicast RTP Streaming Unicast RTP An Overview Unicast RTP Streaming Unicast TCP An Overview Unicast TCP Streaming Features Definitions Front Panel Features Installation OverviewPanels Cabling Status LED Icons Rear Panel Features Parallel/Printer connector not used Pin connector not active/used Configuration Hardware Setup Setup Overview VNM Recorder Power Up Procedure VNM Recorder Login Screen To change the administrator password Login InformationTo add or change usernames and passwords If the VNM Recorder is not logged into VNM Recorder Power Down ProcedureUsing the Front Panel If the VNM Recorder is logged into Choosing the Controller Device Using the Keyboard and MouseFrom the login screen From the Linux desktop Default Network Settings Configuring the VNM RecorderConfiguring the Network and IP Address Settings Ethernet Device Window Confirm Settings Window Stage 2 Setting the controller IP address Config.xml Text Window Configuring the VN-Matrix Encoders and Decoders Stage 3 Restart the VNM Recorder About Web-based Overview of the Web-based User Interface Accessing the Web-based User Interface Controller Login Web-based User Interface Control Options Device List Device List Five channel VNM Recorder That the current and persistent databases remain up-to-date Recorder Device Recorder Device VNM Recorder Recorder Channel contains the following parameters Navigate Navigate To be deleted Make Directory Use this field to add a new directory Player Player Selecting a recording for replay Stop Pause Play Bookmark Config Advanced Configuration Config Zz Playback Finish This is automatically filled in when FEC Forward Error Correction panel Currently not supported Accounts Accounts Clock Management VN-Matrix Encoder and Decoder ConfigurationController Licensing About the Content Directory Overview Content Directory Basics Navigate Page Content Directory Creating a Directory Setting a Stream Storage LocationFolder Icon Loading Icon Alert Icon Understanding Saved Recordings With Multiple Elements Navigate Page Multiple Element Recording Renaming a Stream or Directory Deleting a Stream or Directory Setting up a VN-Matrix Codec as a Decoder Initial Setup and ConfigurationRecording Playing Streams Setting up a VN-Matrix Codec as an Encoder Recording a Stream Switching a Codec between Encoder and DecoderRecording Preparation Initialize Recording Stop Recording Playing a Recorded Stream Playback Preparation Stop Playback Initialize PlaybackPause Playback Start and Finish Times Playback of Bookmarked Streams Using BookmarksFile Structure Deleting Bookmarks About Alarms Alarms Filter Settings Applying Alarm Filter Settings Alarm TypeAlarm Severity Alarm Severity Description Alarm List Alarms Page Alarm List Sorting Alarm Logs Alarm Logs Alarm Type Description Encoder Alarm Reference TablesAlarm Type Description Action Default Settings Alarm Type Description Decoder Alarm Type Description System Controller Included Parts InformationPart Number Guest username matrixrec Guest password matrix Firmware UpdatesPreparing the Firmware Gathering Firmware Installation Information Installing the Firmware Config.xml and Admin.xml Text Files Firmware Installation Table below Terminal window. Manually close the terminal window Browser Configuration Microsoft Internet Explorer version 7 or above Per Site Internet Options Custom Level Security Options Mozilla Firefox version 1.3 or above Cookie Preferences Mounting Tower InstallationRack Installation UL Guidelines for Rack Mounting Rack Mounting Identifying the Sections of the Rack Rails Preparing to Install the Rails Installing the VNM Recorder into a Rack Europe and Africa China USA, Canada, South America Central America JapanAsia Middle East