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TMS320C5517: Help For AER

user4585611
Prodigy 30 points
Part Number: TMS320C5517
Other Parts Discussed in Thread: TLV320AIC3204

Dear sir
​I have gotten a development board TS320C5517​ from your dealer in Shenzhen, China. I would like to control the howling of intercom with your AER library.our connection:microphone is connected to IN1_L and IN1_R of TLV320AIC3204 , speaker is connected to HP_L and HP_R .the audio data is read by TS320C5517 through I2S interface, then we send it to AER, after the process of AER , audio data will be played on TLV320AIC3204.but in practice the howling has not been controlled also the audio has been Jammed. I think that may be caused by the wrong use of AER library. So
would you please send us a sample for similar application

BR

  • 0
    TI__Guru**** 161600 points
    Hi,

    I've notified the sw team. Their feedback will be posted here.

    Best Regards,
    Yordan
  • 0
    TI__Mastermind 30365 points
    BR,

    Unfortunately, we don't have a readily shareable AER example. However, we do have a TI design on the C5517 that does voice processing www.ti.com/.../TIDEP-0077
    video www.youtube.com/watch
    Please take a look at this example for some guidance on using I2S and the aic3204 that's on the C5517 EVM. This does not have AER, but it has Beam Forming, Adaptive Spectral Noise Reduction, Multisource selection and Dynamic Range Compression.

    The howling feature is part of the fabric of the AER package and its not something you can control per say.

    Lali
  • 0 in reply to Lalindra Jayatilleke
    TI__Mastermind 40225 points

    Hi BR,

    Please keep in mind that AER is a complex component which requires proper integration and tuning. The amount of tuning depends on the application. For your intercom application, I expect minimum tuning should be sufficient. Please follow the AER_Integration_Guide.pdf in the docs folder of the installed AER to first get AER integrated properly in your system. Then please follow AER_Quick_Tuning_Guide.pdf to do the minimum tuning. 

    If you can share a block diagram of your system and the testing setup, I may be able to provide some extra information to help you move forward. 

    Regards,

    Jianzhong

  • 0 in reply to Jianzhong Xu
    Prodigy 30 points

    Above please find our block diagram:
    Sound is collected by the microphone and send to walkie-talkie module A;
    Walkie-talkie module A transfers the language information to walkie-talkie module B via wireless link;
    Walkie-talkie module B then sends the sound to the speaker.What we concern is that when the microphone and speakers is close to each other, it would cause the whistle. We would like to use C5517 + AER library to solve this problem, but have no idea how to use the AER library. Would you please help?

  • 0 in reply to user4585611
    TI__Mastermind 40225 points

    Thanks for sharing the information. Unfortunately, I don’t think AER is the right solution for the kind of howling control that you need. What they need is audio feedback control, similar to what’s in a PA system. AER is designed to cancel echo in a system where the mic input doesn't play back in the speaker but goes to the other end of the communication. 

    Regards,

    Jianzhong