Monday, May 24, 2010

Echo Cancellation

If you are hearing echo of yourself, it means the other end is using a speaker/microphone set that doesn't have echo cancellation built-in the hardware or software driver.  There are a couple of ways to avoid this:

1)  Use a headset instead of speakers
2)  Use a microphone that has Acoustic Echo Cancellation (AEC)

The following devices support AEC, and had been confirmed to work with ReelPortal:

- Asus EEE 1000HE netbook (using RealTek HD Audio driver).  Fortunately, many netbooks have this driver as well, or something else that's equivalent.

- LG MSB-100 Bluetooth Speakerphone (~$20 on ebay).  Other bluetooth speakerphones should also work (check Amazon.com for Motorola EQ5, EQ7).

- Logitech EasyCall desktop speakerphone (must use with Logitech driver).

- Logitech QuickCam Deluxe for Notebook, using Logitech QuickCam 10.xx software (for Windows 2000).  Do NOT use the latest Logitech driver/software (for XP, Win 7), as they crippled it so that AEC only works with their Vid software.  Update:  Acoustic echo cancellation ("AEC") is no longer available with versions 11.7 and higher of the Logitech® QuickCam® software. AEC is available from most leading video-calling applications (link).  In other words, new Logitech webcams do not have AEC in the drivers!

- Logitech QuickCall Speakerphone (available on ebay for ~15 USD) is another great product with AEC.

NOTE: Logitech AEC may introduce some delay in the audio playback on slow systems.

Please report other devices with AEC confirmed working with ReelPortal.  Thank you.