VBrick Systems Understanding Bit Rate and Sample Frequency for

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Sample Frequency	See Bit Rate and Sample Frequency for all settings. Frequency at which
	the audio is sampled at the encoder. Range 8–48 KHz. Shown for
	Audio Rate1 only. Audio Rates2 and 3 share this common value. If
	Audio Rate2 or Audio Rate3 s enabled, the Sample Frequency is
	automatically set to 44.1 KHz.

Audio Rate2	Use to configure multiple bit rates. Check Enabled to display
	configuration settings for Audio Rate2. Once enabled, AudioRate2 and
	AudioRate3 are available for selection on the Multicast, Server, and
	Archiver pages. If selected on those pages, an error will display if you
	attempt to disable them on this page.

Audio Rate3	Use to configure multiple bit rates. Check Enabled to display
	configuration settings for Audio Rate3.

Bit Rate and Sample Frequency

The following are the allowed combinations of Bit Rate and Sample Frequency when Audio

Channels is Stereo or Mono (left only) or Mono (L+R).

Table 11. Audio Channels: Stereo/Mono †

Stereo		Mono

Bit Rate (bits/sec)	Sample Frequency (KHz)	Bit Rate (bits/sec)	Sample Frequency (KHz)

192000	48	48000	44.1

192000	44.1	32000	44.1

160000	48	20000	32

160000	44.1	20000	22.05

128000	48	16000	22.05

128000	44.1	16000	16

96000	44.1	12000	16

80000	44.1	10000	16

64000	44.1	10000	11.025

48000	44.1	8000	11.025

48000	32	8000	8

40000	32	6000	8

32000	44.1	5000	8

34	© 2008 VBrick Systems, Inc.

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Contents VB4000-5000-6000 Series Network Video Appliances Copyright Contents SDI Configuration StatusDiagnostics MaintenanceMaintenance Mode WM TemplatesStream Prioritization IndexWM Admin Guide OrganizationGetting Help Getting the Best VideoFont Conventions Printer-FriendlyPreface Topics in this chapter OverviewSystem Requirements for Windows Media Player Standard Features Standard Feature Encoder ReflectorTypical VBrick Applications Http TCPApplication Description VBricks Streaming EcosystemMulticasting UnicastingVBrick Reflecting ReflectingReflecting from VBrick Appliances Push ReflectingPull Reflector Type Pull ReflectingPush Reflecting from a Windows Media Server Other Considerations Using Multiple Bit Rate StreamsMBR Output Streams Configurable Input/Output Stream Rates WM Output Streams Output DescriptionHTTP/RTSP MBR Output SettingsShared Video Settings Independent Video Settings Shared Audio Settings Independent Audio Settings MBR GroupsMBR Troubleshooting Using On Demand Playback Optimizing System Performance Mixed Model AppliancesArchiver and Recorder Functionality Archiver/Recorder FunctionalityVBrick Systems, Inc WM Configuration Configuration Network Configuration Network EthernetDomain Name Server Numbers or hyphensConfiguration Network Routing Network Time SynchronizationWM Configuration Configuration Network Management Configuration Encoder Configuration Encoder TemplateTemplate Name Description LANConfiguration Encoder Video Windows Media Encoder Video -- Slot1 SvidVBrick Systems, Inc Reduces the saturation Settings to allow this Tools Options Security Run Script Video Template Settings -- Slot1 Video Rate1 Video Rate1 Video Rate2 Video Rate3Video Rate1 Video Rate2 Video Rate3 WM Configuration Configuration Encoder Audio Audio Template Settings Bit Rate and Sample Frequency Stereo MonoConfiguration Encoder Multicast Windows Media Encoder Multicast -- Slot1 Multicast Playback NSC File Information -- Slot1Configuration Encoder Announce SAP Windows Media Announce Common Information -- Slot1 Bit mask. This string is simply another keyword you can use Configuration Encoder Server Announce Program Guide SAP for Multicast -- Slot1Windows Media Encoder Server -- Slot1 HttpRtspu URL RtspuHttp URL Unicast Playback Rtsp UDPAnnounce Http and Rtspu Server Rtsp URL Http SAPRtspu SAP ASX Rollover Announce External Server -- Slot1Creating Publishing Points Creating Publishing Points on Windows Media ServersCreating Non-Authenticated Push Publishing Points Creating Publishing Points on Helix Universal ServersConfiguration Encoder Archiver Creating Pull Publishing PointsWM Configuration Windows Media Archiver -- Slot1 FirmwareWM Configuration FTP Server Enable Progressive DownloadConfiguration Encoder Push Http Push Slot1VBrick Systems, Inc Configuration Reflector Configuration Reflector Source Push ReceiverPull Receiver ASX Microsoft Server on-demandPulling MBR Streams Pulling VOD Files from a Microsoft WM ServerConfiguration Reflector Multicast Configuration Reflector Announce SAPConfiguration Reflector Server Configuration Reflector Archiver Configuration Reflector Push Configuration Jpeg Jpeg Configuration Jpeg FTP Configuration Jpeg Capture ConstraintsModel Jpeg Configuration Max Clients † Configuration FTP File TransferConfiguration FTP File Transfer Servers FTP Server Configuration FTP File Transfer Transfers FTP StatusFTP Queue Operation Configuration PassthroughHard Drive Status Configuration Passthrough COM1 Passthrough State ResponderPassthrough State Initiator WM Configuration Configuration System Configuration Passthrough COM2Configuration System General SystemConfiguration System Snmp Traps Front Panel LCD DisplayProgram Files\VBrick\VB6000\Download\ReleaseVxxxxxx Number Event Description Configuration System Security Improving Security Page Run Scripts Using IWS Configuration Script ManagementConfiguration Script Management Event Triggering VBrick Systems, Inc Sample Script Run Scripts Using the IR Remote ControlRun Scripts Using Event Triggers Configuration Script Management Auto Configuration Scripting NotesURL VBrick Systems, Inc SDI Configuration IntroductionConfiguration Encoder Video Configuration Encoder Audio Audio Limitations with SDI Video Input and SDI Audio Input SDI LimitationsVideo Limitations with SDI Video Input VBrick Systems, Inc Status Status System InformationStatus Network Status Status Network Status CodecGeneral InterfaceStatus Network Status Routing Status Encoder Status Status Network Status Network TimeVideo PLX EepromAudio Close CaptioningStatus Reflector Status Status Reflector Status GeneralMulticast Push ReceiveStatus Jpeg Status VBrick WM Appliance Admin Guide 101 Status Hard Drive Status Hard Drive General Status Hard Drive ArchiverVBrick WM Appliance Admin Guide 103 Status Server Status Status Server Status GeneralStatus Server Status Encoder Details HTTP/RTSP ServerStatus Push Status Status Server Status Reflector DetailsHttp Push Status Status System Log Config Status FTP Server Status Status System LogStatus System Log System Event Status System Log Traps Status System Log System InfoStatus User Information Status User Information Main BoardStatus User Information Slot1 112 Diagnostics Network Tests Diagnostics Network Tests Ping TestDiagnostics Network Tests Trace Route Test PDUDiagnostics Device Test Trace Route Test ResultsWhen done, reset Configured Operational Mode to Run Diagnostics Hard Drive 118 Maintenance Maintenance Device InformationMaintenance Read/Write Read From Device Maintenance Default All ConfigurationMaintenance Read/Write Configuration Read Configuration Data from Device Maintenance Read/Write Write To Device Sample VBrick Configuration FileMaintenance Usernames & Passwords Write Configuration Data to Device124 Maintenance Usernames & Passwords Change SNMPv3 Passwords User Level Default User Name Default Password Authority126 Maintenance Mode Maintenance Mode Limitations Maintenance Mode FeaturesMaintenance Mode Indicators Maintenance Mode CLI Operation Command Description EntrySubnet mask associated with WM Templates CBR/CFR Video Encoder Parameter SettingBest Quality Audio Encoder Parameter Setting Cable/DSL-300K, High MotionCable/DSL-128K, Low Motion Cable/DSL-300K, Low MotionCable/DSL-128K, High Motion Modem 56K Security & SurveillanceAudio Channels Mono L +R Bit Rate 8000 Sample Frequency KHz Stream Prioritization Stream PrioritizationNon Bitrate Constrained Bitrate ConstrainedExample 1 Priority List Example 2 Redundant ListHow the WM Appliance Creates Priority Lists For Group ServingFor Archiving, and Pushing to or Pulling from a WM Server Example 4 Sliding Window BehaviorConfiguring Groups Safe Group ConfigurationsIndex Initiator Device Test Network Tests 144

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