AEC Acoustic Echo Cancellation | ClearOne comm SR 1212, PRO TH20

AEC (Acoustic Echo Cancellation)

AEC (Acoustic Echo Cancellation) reduces or removes acoustical echo from an input signal, thereby improving audio clarity. Converge Pro devices perform AEC using the full bandwidth (20hz to 22kHz) of the signal.

AEC uses a reference source to perform AEC based on the acoustic characteristics and dynamics of a specific room. Use the AEC Reference/PA Adapt Reference tab to set up these references.

Accessing AEC

With the Channel tab selected on the Tab Bar, select the desired Mic Input channel on the Tree View tab in the Site Pane, and press the AEC button (located just below the Pre Gain meter).

The Channel Property Configuration screen appears with the AEC tab selected (see below).

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ClearOne comm SR 1212, PRO TH20, PRO 8I operation manual AEC Acoustic Echo Cancellation, Accessing AEC

Contents

Converge PRO 880880T880TA840T8iTH20 Converge SR 1212SR 1212A Clearone Part no -151-880 Revision 3.2 April Adobe Flash Copyright and Trademark Notice Introduction 218 310 Converge Pro Product Family Overview Applications Models Common FeaturesFeature Enhancements Common Benefits AEC Acoustical Echo Cancellation Enhancements Telephone Hybrid Enhancements 880T, 880TA, 840T, TH20 Important safety information Read all safety information before using this product Advanced Telephone Conferencing Feature Set Converge Pro 880TA Converge Pro Product Descriptions Converge Pro Converge Pro 880T Converge Pro 840T Converge Pro Converge Pro TH20 Converge Pro SR 1212A Converge Pro SR1212 Product Registration Customer Service and SupportWarranty Information Operating Requirements System Requirements Converge Pro 880 Package Contents Unpacking Converge Pro 880T Package Contents Converge Pro 880TA Packing Contents Converge Pro 840T Package Contents Converge Pro 8i Package Contents Converge Pro TH20 Package Contents Converge Pro SR1212 Package Contents Converge SR 1212A Packing Contents Converge Pro 880 Front Panel Controls and ConnectionsConverge Pro Front Panels Converge Pro 840T Front Panel Converge Pro SR1212 Front Panel Converge Pro 8i Front PanelConverge Pro TH20 Front Panel Converge Pro SR1212A Front PanelPage Converge Pro 880T Rear Panel Converge Pro 880TA Rear Panel Converge Pro Rear PanelsConverge Pro 880 Rear Panel Converge Pro 840T Rear Panel Converge Pro SR1212 Rear Panel Converge Pro Rear Panel ConnectorsConverge Pro TH20 Rear Panel Converge Pro SR1212A Rear PanelPage Page Audio and Control Buses Expansion BusExpansion Bus Connections Assigning Device IDs Device IDsDevice Types and IDs LCD Programming Overview Adjusting LCD Menu Parameters LCD Menu TreePage LCD Default Display Front Panel Lock LCD Channels Menu Accessing the Channels MenuSetting Channel Gain and Mute Channel Display Default Contrast LCD Settings MenuAccessing the Settings Menu RS-232 Network Baud Rate Flow Control Hardware Executing Macros Accessing the Macros MenuLCD Macros Menu Executing Presets LCD Preset MenuAccessing the Presets Menu Installing Converge Console Converge Console programmingPage Page Converge Console Overview Accessing Converge ConsoleDefault User ID and Password Navigating Converge Console Button Bar File View Add Connect Modes ServicesMenu Bar Tab Bar Site Pane Center Pane Console Modes Objects PaneStatus Bar Accessing Site Files Site File OverviewPage Saving Site Files Disconnect from a Site Connect to a SiteConnect To a Site Accessing Site Properties Site Properties Create a New Site Site Properties General Tab Email Notifications Site Properties Management TabControl Master Unit User name/Passwords Site Properties Time/Local TabPage Accessing Unit Properties Unit Properties Device Name Add a New UnitUnit Properties General Tab Device ID Audio Master Room Default Meter & ChannelFront Panel Mode & PIN Front Panel Lock/Unlock Telephone Country Code AMX Duet Mode IP SettingsSerial Port Settings Unit Properties Comm Communications TabPage Configuration Mode Tabs Configuration Mode OverviewAccessing Configuration Mode Unit Tab Functionality Accessing the Unit TabUnit Tab LED Buttons Input Channel SettingsOutput Channel Settings Processing Channel Settings Fader Channel Settings Power Amp Channels Converge Pro 880TA and SR 1212A Expansion Audio RX and TX Sound Mask Launches the Sound Mask pane Page »» Feedback Eliminator Settings »» Feedback Controls »» Filter Depth Mode »» Mode »» FilterPage Page Channel Tab Overview Accessing Channel TabChannel Configuration Controls Channel Routing Matrix Channel Property Configuration ScreenMeters Page Page AEC Acoustic Echo Cancellation Accessing AEC NLP Non-Linear Processing Radio Buttons Enable AEC CheckboxPA Adapt and AEC Reference Button ERL Echo Return Loss Meter PTT Push to Talk Mode ERL + Erle Meter NC Noise Cancellation Accessing NC Configuring Noise Cancellation All Pass High Pass Low Pass Notch PEQ Parametric Equalizer Accessing FiltersFilters Active Filter Filter Types Filter NodesAdding Filters Frequency Available for all filter types Phase Bypass All Table View Add FilterRemove Filter Accessing AGC/ALC AGC/ALC Automatic Gain Control/Automatic Level Control Tab Active Gain Meter Maximum Gain SliderTarget Level Slider Response Time Slider Accessing Channel Gating Configurations Mic Gating Gate Settings Manual Gating Gating Settings Auto GatingAuto Gating Settings Auto Gating Ambient Tracking Gating Groups Manual Gating SettingsManual Gating Manual On/Manual Off Post Gate MeterPage Ppwr Phantom Power Mic Input SettingsAccessing Mic Input Settings Channel Label Post Gain Meter Pre Gain MeterGain Section Post Process Meter Channel Configuration Buttons 100 Channel Routing Matrix InputsExpanded Channel Routing Matrix Creating Channel Objects 101 Optimizing Input Gain Structure 102 103 Line Input SettingsAccessing Line Input Settings AGC Automatic Gain Control Button Gain SliderMute Button 104 105 AGC Configuration SettingsChannel Routing Matrix Line Inputs Channel Routing Matrix Outputs, Processing, Faders 106 107 108 Telco RX SettingsAccessing Telco Rx Settings NC Noise Cancellation Tab 109 Ringer Cadence Telco Settings Tab110 111 Telco Meters TabDialer Button Recv Input Meter Dial Tone Level SliderRecv Boost Slider 112 ALC Button NC ButtonClear Effect Button NOM Button 114 Min/Max LimitsPost-Gain Meter 115 116 NOM Number of Open Mics/Constant Level Output SettingsAccessing Output Settings 117 118 Output Level MeterChannel Routing Matrix Outputs Channel Routing Matrix Inputs, Processing, Faders 119 120 Optimizing Output Gain Structure 121 122 Telco TX SettingsAccessing Telco Tx Settings 123 124 LimiterChannel Routing Matrix Telco Tx 125 126 127 128 Processing SettingsAccessing Processing Settings 129 Delay ButtonFilter Button Cmprs Compression Button 130 Threshold GroupPost Compressor Gain Ratio Gain Slider & Process Meter Input MeterCompression Meter 132 133 134 135 136 Fader SettingsAccessing Fader Settings 137 Gain Slider & Post Gain MeterChannel Routing Matrix Faders 138 139 Routing Legend Accessing the MatrixMatrix Tab 140 Input Routing Clear Matrix ButtonAudio Routing Matrix Expansion Bus I-Z Routing 142 Cross Point Shortcut MenuCross Point Level Control Clear Matrix Copy and Paste CellsCopy and Paste Matrix Exporting Matrix Objects AEC/PA Adapt References Sources Accessing AEC Reference/PA Adapt ReferenceAEC Reference/PA Adapt Reference Tab 144 Virtual AEC/PA Adapt References 145 146 Expansion Bus Reference SourcesPA Virtual References Output channels Speakers Virtual references Macro Recorder Accessing MacrosMacro Tab 147 148 Macro EditorCreating Macros Modifying Macros Adding and Inserting Command LinesRunning Macros Using Console Deleting Macros Exporting Macro Objects Running Macros Using the Front PanelRunning Macros Using Control Devices 150 Gating Controllers Accessing Gating GroupsGating Tab 151 152 Internal Gating GroupsGlobal Gating Groups 153 Control Tab Accessing the Control TabUser-Definable Pins 154 Control/Status Pin Programming Default Pin AssignmentsControl/Status Ports 155 156 Clearing Pin ProgrammingExporting Control Objects Creating Command Strings Accessing the String TabCommand String Special Characters String Tab Running Command Strings 158 Scheduling Events Accessing the Event SchedulerEvent Scheduler Tab 159 160 Database Button Bar Accessing the DatabaseDatabase Tab 161 162 AV DevicesCreating a New AV Device Mic Input Line Input Telco Rx Output Telco Tx Channel Objects163 Modifying AV Devices and Objects Import/Export AV Devices and ObjectsUpload/Download AV Devices and Objects 164 165 166 Optimizing Gain StructureOptimizing Gain for Mic Input Channels Optimizing Gain for Telco Tx Channels Optimizing Gain for Line Input ChannelsOptimizing Gain for Telco Rx Channels Optimizing Gain for Output Channels 168 Using Drag and Drop Configuration Drag and Drop ConfigurationAccessing Drag and Drop Configuration 169 Creating Objects 170 171 172 Control Objects Preset ObjectsMatrix Objects Macro Objects 174 175 Preset ModeAccessing Preset Mode Preset Configuration Tabs 176 Creating Presets 177 178 Executing Presets Using Control Programming Executing Presets Using ConsoleExecuting Presets Using the LCD Preset Menu 179 Preset Control Masking Executing Presets Using MacrosPreset Execution Flags Preset Storage Space Considerations Exporting Preset Objects 181 182 Accessing the File MenuFile Menu Overview File Menu allows you to use Site Files and Print Reports 183 Report Window Accessing Print ReportsPrint Reports 184 185 Accessing the View MenuView Menu Overview View Menu Options 186 Adding Units Accessing the Add MenuAdd Menu 187 188 189 Connect Menu Overview Accessing the Connect MenuSite Setup Overview Connect To a Site Create a New Site Connect Menu Options Modes Menu Overview Accessing the Modes MenuConfiguration Mode Preset Mode Console Button Bar 191 Service Menu Options Services Menu OverviewAccessing the Services Menu 192 193 Accessing DialerDialer Muting Using Line FeaturesPlacing and Ending Calls Renulling the Line Phonebook Accessing PhonebookUsing Phonebook 195 Dialer Button Bar Services Menu Overview 196 Label Editor Accessing Label EditorUsing Label Editor 197 198 Accessing Device LogDevice Log Using Device Log 199 200 201 Accessing Event LogEvent Log 202 Using Event LogServices Menu Event Scheduler Web Builder Accessing Web BuilderConfiguring User Console 203 Line User Volume Down Volume Up Mute 204 Configuring Control Console 205 Accessing the Web Portal 206 207 Loading Firmware Accessing Firmware LoaderFirmware Loader 208 209 Meter View Tab Accessing Debug ConsoleDebug Console 210 Gate View Tab 211 Running a Signal Test Signal GeneratorTest Signal Types 212 213 Tone Frequency SettingsSystem Checks Tab 214 System Check Config TabPA Temp Define PA Fault Define Sound Masking Tab ADD Info 215 216 Execute PresetsAccessing Execute Presets 217 Conventions Command Form DescriptionType and Device IDs 218 219 Groups and ChannelsPA Virtual Reference Meter Type Definitions Table 220 221 Cleareffect Clear Effect Wide Band Telco Emulation Serial Command IndexAEC Acoustic Echo Cancellation Enable / Disable 222 223 224 Refsel Reference Select for PA Adaptation & AEC 225 226 Serial Commands 227 Adclip Audio Clipping AD Auto Disconnect Enable / DisableAconnlvl Audible Connect / Disconnect Level 228 229 Adpresent Audio PresenceAGC Automatic Gain Control 230 Avrt Adaptive Volume Ratio AVG Adaptive Volume GainAVR Adaptive Volume Reference AVT Adaptive Volume Threshold 232 Clock Clock Set Compdly Compressor DelayCompdlyEN Compressor Delay Enable 233 Compsel Compression Select Compress Compressor AdjustCtrlmaster Control Master Mode Country Country Selection 235 Devicesubtype Sets the Subtype of a Connected Device Dfltm Default MeterDiag Diagnostic Commands Devicetype Sets the Type of a Connected Device 237 238 Enetdhcp Ethernet Dhcp SelectionEnetdomain Ethernet Domain Argument 239 FE Feedback Elimination EnableEref Expansion Bus Reference Groups and Channels 240 FEN Feedback Elimination Nodes 241 Filter Filter Adjust 242 Filtsel Filter Select FMP First Mic Priority ModeGain Gain Adjustment Flow Flow Control Gover Gating Override Gmode Gating ModeGate Gate Status Gpiostatus General Purpose Status Grpsel Gating Group Select Gratio Gate Ratio AdjustGreport Gate Report Hook Hook Flash 246 247 LVL Level Locstate Location StateLogmask Device Log Mask 248 Macro Macro Execution/Reporting Lvlreporten Level Report EnableLvlreport Level Report Manufacturer Manufacturer Identification Label 250 MC Multi-Channel ModeMcgain Multi-Channel Gain Mcramp Multi-Channel Ramp Mcminmax Multi-Channel Min and max Gain SettingMcmute Multi-Channel Min and Max Gain Setting DB / sec 252 MIN Minimum Gain SettingMmax Maximum Number of Microphones Mtrxclear Clear Matrix Model Model Identification LabelMtrx Matrix Routing 253 NCD Noise Cancellation Depth Adjust Mtrxlvl Matrix Attenuation AdjustName Unit Name Netbios Name Mute Mute Null Null the Telephone Line Ncsel Noise Cancellation SelectNLP Non Linear Processing Adjust 255 PAENergy PA Energy-saver mode PAA PA Adaptive ModePacen PA Softclipper Enable 256 257 Paeqrst PA EQ Filter ResetPaeqset PA EQ Filter Set Argument Type Size Paimped PA Output Impedance Paflt PA FaultPalen PA Limiter Enable Palt PA Limiter Threshold Pangm PA Noise Gate Mode Pangat PA Noise Gate Activation TimerPangen PA Noise Gate Enabled Pangf PA Noise Gate Filter 260 Pato PA Thermal Overload Pasmm PA Sound Mask ModePasmt PA Sound Mask Timer Phonebookadd Adds an Entry to the Phonebook 262 Pttthreshold Push to Talk Threshold Ramp Ramp Gain AdjustmentPrgstring Program String Pushtotalk Push to Talk Redial Redial the Last Number Refset Reference Channel Set UpReset Reset Ring Ring Indication 265 Rxboost Receive Boost Ringoff Ring Cadence Off TimeRingon Ring Cadence On Time 266 267 Slvl Speech Level Control Siggensweep Signal Generator SweepSigtout Signal Generator Time Out Smtpsrv Smtp Mail Server Address 269 270 Syschecks System ChecksSysresult System Check Result Tamode Telco Adapt Mode 271 272 273 Xdelaysel Audio Delay Enable 274 Serial Command Support Table 275 276 277 278 279 280 Control/Status PortsConverge Pro 880 Port a Female DB-25 Converge Pro 880T Port a Female DB-25 281 Converge Pro 840T Port a Female DB-25 282 Converge Pro 8i Port a Female DB-25 283 Converge Pro TH20 Port a Female DB-25 284 Converge SR 1212 Port a Female DB-25 285 286 All Models RS-232 PortAll Models Port B Female DB-25 Appendix C Firmware Loading Procedure 287 Converge Pro 288 289 Control/Status Ports Converge Pro 880T 290 291 Converge Pro 880TA 292 293 Converge Pro 840T 294 295 296 297 Converge Pro TH20 298 Converge SR 299 300 Converge SR 1212A 301 302 303 FCC Part 15/ICES-003 ComplianceFCC Part 68 Compliance Electrical Safety Advisory 304 Equipment Safety 73/23/EEC Low Voltage Directive LVD IEC 60950-1305 306 2003/11/EC & 2002/95/EC RoHS Compliance Directive 307 Safety 73/23/EEC Low Voltage Directive LVD 308 NEW Zealand Compliance 309 Glossary 310 311 312 313 314 315

ClearOne comm SR 1212, PRO TH20, PRO 8I AEC Acoustic Echo Cancellation, Accessing AEC

Models: SR 1212 PRO 8I PRO TH20

AEC (Acoustic Echo Cancellation)

Accessing AEC