HelloSoft Echo Canceller SDK

Imagination’s HelloSoft Echo Canceller is high quality Echo Canceller which handles both Line and Acoustic Echo cancellation. It is robust, very low complex, highly optimized, and compliant with ITU-T Rec. G.168 (01/2007), ITU-T Rec. G.167 (03/1993) and P.340 (05/2000) specifications. The full-duplex functionality of is proven on different hardware and OS based platforms including IP Phones, speakerphones, mobile handsets, ATAs, CPEs and residential gateways. It is capable of canceling effective acoustic echo span of up to 128ms in a 512ms moving window span and supports sampling rate up to 48kHz.

• Some of the key features of Imagination’s HelloSoft Echo Canceller are –
• Robust double talk detector for quick detection of near-end signal
• Fast detection of echo path change and rapid re-convergence to new echo path
• Adaptive spectral matching of background noise for comfort noise generation during single talk
• Very low (4ms) algorithmic delay.
• Echo free & full duplex functionality in loud speaker mode operation on commercially available mobile platforms
• Excellent cancellation for real-time speech signals and proven on different real time target platforms and operating systems
• Supports built-in noise cancellation, Automatic Gain Control, Howling Control and Fax Tone Disabler
• Low CPU usage on different target platforms to provide increased device battery life
• Easy integration with platform audio interface at User or Kernel space
• Flexibility and easy integration with the rest of the system enabled by simple APIs
• Commercially deployed and proven on leading speakerphones and cellular handsets