Axis Communications 250S Appendix G Bandwidth, Video Bit Rate, Image Quality vs Bit Rate

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AXIS 250S User’s Manual

Bandwidth

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Appendix G - Bandwidth

As different networks have different characteristics and different amounts of bandwidth available, the AXIS 250S’s video and audio settings may need to be adjusted to suit the prevailing conditions.

The Video Bit Rate

The video bit rate describes how much video data is transferred per second, and can be configured from 0.25 - 8 Mbit/s. Whether or not you should use the available highest rate depends on the answers to a few questions:

Does your application actually need a video stream at the highest quality? Try viewing the live video stream and uploading MPEG-2 files using several different bit rates. Using the lowest acceptable bit rate is recommended.

Are there other bandwidth-dependent services running on the same network? Will the bit rate used by the AXIS 250S cause problems for these services?

How many clients are likely to be viewing the video stream at any one time? The maximum number of viewing clients on a 100 Mbit switched local area network is 3.

Image Quality vs Bit Rate

The quality of the video stream in relation to the bit rate can be roughly illustrated by the graph below.

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Contents Axis 250S MPEG-2 Video Server Axis 250S User’s Manual Table Of Contents Index Introduction Features and BenefitsAxis 250S User’s Manual Applications Axis 250S Rear Panel Product DescriptionAxis 250S Front Panel Title/Variant Part Number Title/Variants Part Numbers Hardware InventoryUnix only Type this in your command line Installing the Axis 250SClient System Requirements Axis 250S User’s Manual Installing the Axis 250SInstalling the Axis MPEG-2 Viewer Client Configuring the video source and audio equipment Accessing the Axis 250S from Internet ExplorerOperating the Axis 250S Accessing and logging on to the Axis 250SLive View Access from a browserPositional Control of the Video Source Disconnected Video SourceEvents and Event Types Configuring Event TypesSetting up a new event type General When Triggered Adding an Upload Server Upload ServersHttp Notification Notification ServersVideo Audio & Video SettingsPort Status Port Status & DevicesAudio Devices Preset position setupLive View Layout Accessing The System Options Administration & System OptionsUsers Administration DescriptionSystem Options Overview Adding Users Firewall SettingsEditing and Deleting Users Adding Allowed IP AddressesNew Server Time Date & TimeCurrent Server Time Automatic IP Configuration TCP/IP Network SettingsDynamic IP Address Notification Settings Parameter DescriptionDNS Manual IP ConfigurationPorts & Devices Smtp email Network SettingsNetwork Traffic IO PortsCOM-Port MaintenanceSupport Logs & Reports Factory Default Settings Installing the Axis IP Installer Appendix a Other IP Setup MethodsUsing the Axis IP Installer Setting the IP Address with the Axis IP Installer Checking the Firmware Appendix B TroubleshootingSupport Server ReportPing Reply Interpretation and recommendation PINGing Your IP AddressSymptoms Possible causes Remedial actions Symptoms, Possible Causes and Remedial ActionsRepeatedly attempts to Attempting to install, but Appendix C Updating the Firmware Obtaining Updated firmware Updating the firmwareModifying the File System Configuration via FTPAppendix D Customizing The Axis 250S Editing and Storing Your Web pages Customizing ProceduresCustom Web Pages Http//server ip address/local/filename.html Creating a New Home Connector Pinout Terminal Blocks a & B D-Sub ConnectorAppendix E Unit Connections I/O Terminal BlocksAxis 250S Schematic Diagram Terminal Connectors a & BPan Tilt Device Driver Connecting Pan/Tilt DevicesBrowser Administration Tools Digital Inputs Controlling and MonitoringTransistor Output Axis 250S then displays the status of the inputs, as follows Appendix F Technical Specifications Approvals EMC Image Quality vs Bit Rate Appendix G BandwidthVideo Bit Rate Other Considerations Index BootpPTZ devices Reports Axis 250S User’s Manual Index