Why does Nexus One deliver such great call quality? Well, it's all thanks to Audience's Third Generation 'A1026 voice processor', which utilizes two mics to "uniquely identify the primary voice in conversation and eliminate surrounding noise." Besides the Nexus One, it will come to other mobile handsets this year.
The Audience A1026 Voice Processor boasts features like:
- Powerful Processing: the A1026 chip includes a low-power, high-performance custom Digital Signal Processor (DSP) core that delivers industry-leading stationary and non-stationary noise suppression, acoustic echo cancellation (AEC), and Programmable Voice Equalization (VEQ) algorithms.
- Easy Integration: the A1026 voice processor is provided in a highly compact 2.7mm x 3.5mm, 40-pin WLCSP (0.5mm pitch) package that can fit any handset style or design and easily integrates into existing mobile phone architectures. It also provides an auto-calibration feature eliminating the need to make per-unit adjustments on the production line.
- Energy-Efficiency: the A1026 voice processor delivers approximately 30% power reduction from previous generation products in standard talk mode.
- Performance Advancements: the new A1026 processor includes customizable voice quality tuning capabilities, a Post-Equalization Filter that allows handset manufacturers to manage frequency response, and a Multi-band Compander (MBC) to improve audio quality and reduce distortion for end-users when receiving communication, or using the phone's speaker phone function.
Full Tech Spec:
- Transmit Non-Stationary and Stationary Noise Suppression
- Receive Noise Suppression
- Acoustic Echo Cancellation
- Transmit and Receive Post Equalization Filtering
- MultiBand Compander (MBC)
- Voice Equalization
- Low Power and High Performance Audience DSP Core
- Power Supplies
- Digital I/O: 1.8V~3.3V
- LDO: 1.8V
- Up to 400kHz I2C Compatible Host Interface
- Two Slave PCM Interfaces
- 2 Analog Microphone or Digital Microphone Inputs
- Analog Audio Output
- 40-pin WLCSP, 0.5mm pitch