By making the AGC aware of the AEC state, we can avoid having the AGC becoming a cause of howling. Noise Reduction is done pre-NLP, resulting in a far cleaner audio stream feeding into the non-linear processor. *NR2 is not turned on.Īdaptive Digital Technologies’ high definition acoustic echo canceller ( HD AEC), has integrated Noise Reduction and AGC into its AEC algorithm and created appropriate hooks to make them work together seamlessly. Note: MIPS generated with AGC, NR and CNG enabled. HD AEC C55x CPU Utilization & Memory Requirements HD AEC C64x / C64x+ CPU Utilization & Memory Requirements When using external source for program and data memory, MIPS increase by 3x per enabled microphone. Note: MIPS generated with single mic enabled, and running with on chip (internal) program and data memory only. HD AEC C674x CPU Utilization & Memory Requirements HD AEC ARM Cortex-M7 CPU Utilization & Memory Requirements Specifications measured on TI Tiva C series ARM Cortex-M4 based MCU. Note: HD AEC Cortex-M4 MIPS generated with 0 wait state FLASH. HD AEC ARM Cortex-M4 CPU Utilization & Memory Requirements Specifications measure on BeagleBoard-xM TI AM37x ARM Cortex-A-8 based MCU. Note: MIPS generated with single mic enabled,running with on chip (internal) program and data memory only. Nc.HD AEC ARM Cortex-A8/A9/A15/A17 CPU Utilization & Memory RequirementsĪll Memory usage is given in units of byte. Nc.addEventListener(AsyncErrorEvent.ASYNC_ERROR, onAsyncErrorEventHandler) Nc.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler) Public function EchoCancel_RTMPTestNotWorking() Define before compilation who we are first phone or second phone Private var PLAY_STREAM_NAME:String = "" Private var PUBLISH_STREAM_NAME:String = "" Public class EchoCancel_RTMPTestNotWorking extends Sprite I established the connection between iPhone6 (8.1.3) and iPhone 6+ (9.3.2) and tried with another combination iPhone 5s (9.2.1) and iPhone6(8.1.3) using below code snippet: I tried reproducing the problem using the sample project that you shared : I have not tried this with setLoopBack(true) as I only use that mode for user to make sure they can hear themselves as a test - not during a call which is where I need AEC. On ios side, if mute mic (mic=null) while in a call, the incoming sound returns to normal without garble/delay - unmute the mic (mic=enhancedmic) incoming sound becomes garbled/delay. Note using ios on one side with enhanced mic, android/win/mac on the other without enhanced mic - all configurations result in the same garbled/studder sound, and add delay on inbound on the ios side.
In our case, an example is as follows:ġ) create a netconnection to an rmtp server (media server)Ģ) once connected, create a netstream, attached to the above netconnection I also tried changing the mic.rate up and down with predictable results: at 48 the sound is sped up so the voice sounds like a garbled mickey mouse (well sort of).
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