مدار مجتمع (آی سی) آی‌سی صوتی ویژه

Product Attributes

Introduction

The ZL38AMB is part of a new audio processor family featuring innovative AcuEdge acoustic technology, a set of highly - complex and integrated algorithms. These algorithms are on a powerful DSP platform to extract intelligible information from the audio environment. It is designed to provide leading edge far field microphone processing with advanced features for IP and security cameras with high definition (HD) 2 - way hands - free voice. The license - free, royalty - free intelligent audio Firmware provides Beamforming, Sound Location Estimation, Acoustic Echo Cancellation (AEC), Noise Reduction and other voice enhancements to improve voice intelligibility and quality in harsh environments. Additional tools are offered to speed up the product development cycle, like MiTuner™ ZLS38508 or ZLS38508LITE GUI software packages for interactive configuration and the optional MiTuner ZLE38470BADA Automatic Tuning Kit for automatic tuning and manual fine - tuning.

Features

• DSP with Voice Hardware Accelerators
• Dual ΔΣ 16 - bit digital - to - analog converters (DAC)
• Sampling up to 48 kHz and internal output drivers
• Headphone amps capable of 4 single - ended or 2 differential outputs
• 32 mW output drive power into 16 ohms
• Impulse pop/click protection
• 2 Digital Microphone inputs supporting up to 4 Microphones
• 2 TDM ports shared between PCM and Inter - IC Sound (I²S)
• Each port can be a clock master or a slave
• Each port supports delayed and non - delayed (GCI) timing and I²S normal and left justified modes
• Each port provides sample rate conversion and synchronous TDM bus operation
• SPI or I²C Slave port for host processor interface
• General purpose UART port for debug
• Master SPI port for serial Flash interface
• Can run unattended (controllerless), self - booting into a configured operational state
• Flash firmware can be updated from SPI Slave

Applications

• Far Field Microphone Processing
• Microphone Beamforming
• Sound Location Estimation
• Audio Compressor/Limiter/Expander
• Wideband Acoustic Echo Cancellation (for up to 3 microphones)
• Full or Half duplex operation
• Supports long tail AEC (up to 256 ms)
• Howling detection/cancellation
• Non - linear echo cancellation provides higher tolerance for speaker distortions
• Advanced noise reduction reduces background noise from the near - end speech signal using Psychoacoustic techniques
• Provisions for stereo audio mixing and stereo music record and playback (sample rates of 48 kHz) with 16 kHz voice processing
• Various encoding/decoding options: 16 - bit 2’s complement (linear), G.711 A/μ law, G.722
• Send and receive path 8 - band parametric equalizers
• Comfort noise generation
• 48 kHz bypass mode
• Configurable Cross Point Switch