Advanced Security Camera Audio Processor 64-Pin QFN T/R

The ZL38051 is part of Timberwolf audio processor family of products that feature the company’s innovative AcuEdge acoustic technology, which is a set of highly-complex and integrated algorithms. These algorithms are incorporated into a powerful DSP platform that allow the user to extract intelligible information from the audio environment. The Microsemi AcuEdge Technology ZL38051 is designed to provide leading edge far field microphone processing with advanced features targeted for IP and security cameras with high definition (HD) 2-way hands-free voice. The Microsemi AcuEdge Technology license-free, royalty-free intelligent audio Firmware provides Beamforming, Sound Location Estimation, Acoustic Echo Cancellation (AEC), Noise Reduction and a variety of other voice enhancements to improve both the intelligibility and subjective quality of voice in harsh environments. Microsemi offers additional tools to speed up the product development cycle. The MiTuner ZLS38508 or ZLS38508LITE GUI software packages allow a user to interactively configure the ZL38051 device.

• 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
• Prevents oscillation in AEC audio path
• 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