Acoustic Components

Overview

Ittiam's Acoustic Components are a complete suite of audio/acoustic algorithms designed to enable high quality, full duplex communication in mobile phones, hands-free car kits, speakerphones and other applications. The suite includes Echo and Noise cancellation, along with acoustic algorithms to improve voice and audio quality. The acoustic software enables clear voice quality at low processing power.

Components

• AEC - Acoustic Echo Cancellation
• Configurable Tail length
• High convergence speed and depth
• Robust Double Talk detector
• Configurable to work optimally in several application scenarios
• Conforms to ITU-T P.340 Full Duplex Type-I requirements
• Smooth non-linear processor (NLP)
• Context adaptive Comfort Noise - matching background noise level
• Anti-howling control for AEC
• Supported sampling rates: 8 KHz, 16 KHz
• ANR - Ambient Noise Reduction
• Works with single microphone configuration
• Suppression of both stationary and non-stationary noises
• Conforms to 3GPP 26.077 and ITU-T G.160 (VED) requirements
• Suppression of noise up to 18 dB
• No distortion to the signal is introduced while suppressing noise. (No 'musical noise'/clipping/fluctuation in speech level)
• Noise adaptation time of less than 1 second
• AGC - Automatic Gain Control
• Smooth gain transitions. No perceptual distortion introduced
• Supports sample rates from 8 kHz to 48 kHz
• Supports mono and stereo channels
• Supports configurable reference output level
• Supports configurable gain adaptation rate
• DRC - Dynamic Range Control
• Smooth gain transitions. No perceptual distortion introduced
• Supports configurable threshold levels
• Supports configurable attack and release times
• Supports sample rates from 8 kHz to 48 kHz
• Supports mono and stereo channels
• Listener Quality Enhancement
• Background noise adaptive gain control
• Smooth gain transitions. No perceptual distortion introduced
• Supports configurable gain adaptation rate
• Equalization Control
• Full audio band coverage
• Supports sample rates from 8 kHz to 48 kHz
• Supports mono and stereo channels
• Supports configurable filter length
• Supports configurable number of bands
• Supports multiple simultaneous Equalizer instances
• Supports both static and dynamic control of Equalizer parameters

Features and Benefits

• Complete suite of acoustic and audio components to meet the requirements of hands-free communication application
• High-quality AEC algorithm and Ambient Noise Reduction
• Improves speech intelligibility and reduces listening fatigue in voice communication
• Improves listening experience with audio playout and enhances recording quality
• Pre integrated acoustic software simplifies integration and test
• Implementations optimized for MCPS, Code and Data Memory usage
• Supplemented with Audio, Video and System Software to provide cost and time-to-market advantage

Target Applications and Segments

• Smartphones
• Mobile Internet Devices (MID)
• Video Telephony
• Handsfree kits
• Bluetooth headsets
• Audio/Video Conferencing

Supported Devices

• ARM Cores
• Cortex A8 (with Neon support) (ARMv7)
• ARM11 (ARMv6)
• ARM9E (ARMv5TE)
• Mobile Application Processors, including the TI OMAP2 and OMAP3 families
• OMAP 2530™, OMAP 3530™
• OMAP 3430™, OMAP 3630™, OMAP 3621™

Contact

For further information, including availability and performance of components on specific devices, contact mkt@ittiam.com