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双麦阵列定向拾音降噪消回音芯片NR2048
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2023-04-13
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NR2048采用最新的双麦阵列定向拾音束技术,可以针对高噪音环境下对讲通话设备进行噪音压制,降噪有效指标达到了80db,广泛使用在一些机场地勤,高铁驾驶,医疗CT,等一些特种高噪音环境通话设备的对讲质量改善.
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NR2048
www.acoustic-s.com Date: 02/07/2020 Version: 1.0
High Performance Voice Processor
for Mobile Applications
Product Data Sheet
near-end and far-end users. With acoustics’s proprietary
NR2048 provides system integrators and designer
NR2048
www.acoustic-s.com Date: 02/07/2020 Version: 1.0
With low power consumption and highly compact footprint, the NR2048 voice
voice processor capable of HD NR2048 is the new generation of
voice processing technology, the NR2048 uses
1. Introduction
Voice (wideband) and narrow band voice processing, and it is designed to improve
intelligibility for voice calls, as well as helping to improve voice recognition command inputs
in noisy environments. It delivers state-of-the-art voice processing capabilities to improve
the listening experience of both
advanced beam-forming technology to
track the caller’s voice and filters out the unwanted background noises, providing natural
and clear conversations for users in any environment.
1.1 Overview
processor provides noise suppression, acoustic echo cancellation (AEC) and other adaptive
voice enhancements for mobile communications. It also contains specific processing
modules to improve voice recognization (VR) rate and improve voice recording in noisy
environments.
s great degree of flexibilities to customize
each processing module and fine-tune the algorithms to adapt to each device’s unique
needs and acoustic path characteristics. This IC can be easily integrated into system
architectures with either a split Applications Processor(AP)-CODEC-Baseband or a highly
integrated SOC basedband framework.
1.2 Key Features
Highly integrated SOC
o High performance voice processor with built-in hardware support for signals
from 8KHz to 48KHz sampling rate
o Voice processor with on-chip dual-core digital signal processor (DSP) sub-
system, which includes hardware computation accelerators, RAM, and ROM
o Three indepedent sets of serial port supporting flexible digital data formats,
and each can be programmed as PCM, I2S or slave-mode TDM
o Five TDM channels support up to three independent formats, and each TDM
channel can be configured as either I2S or PCM
o Highly configuable pins programmable to support up to three PDM inputs and
four PDM outputs
o PDM clock for PDM output data can be at 1.024, 2.048, 3.072 or 4.096 MHz.
o Serial Host Interface(SHI) is I
2
C-compatible and supports on-the-fly
command and parameter download for processor control and configuration
o Flexible clocking input with built-in PLL, supports 3 to 48MHz ( in 1 or
2.048MHz steps, as well as 3.684, 7.68, 14.4, 15.36, 16.8, 19.2, 19.68, and
38.2MHz
o Programmable digital gain control:-143.25 to +24dB in 0.75dB increments on
voice input/output ports
Enhancement (ERLE) up to 85dB
NR2048
www.acoustic-s.com Date: 02/07/2020 Version: 1.0
High performance
o Robust AEC providing full-duplex conversation with overall Echo Return Loss
o Noise Suppression providing natural and clear conversation in noisy
environment
o Supports Wideband (HD Voice) and narrow band voice applications
o Bright Voice Enhancement (BVE) for inbound listening improvement
o Dynamic Range Control (DRC) for inbound and outbound voice paths
o Automatic Gain Control (AGC) on inbound and outbound voice paths
o Far-field voice pick-up for hands-free conferencing application
o Automatic microphone calibration to compensate for ±3dB microphone
sensitivity variances on multiple microphone implementation
o High resolution equalizer to compensate for the loudspeaker frequency
response in music playback mode
o Audio equalizer to compensate for the receiving and sending frequency
responses in voice communication mode
o Supports true 3-mircrophone voice processing in handheld narrow band calls
o Built-in side-tone generation
o Voice recognition(VR) rate enhancement mode for voice search application
under high noise environments for both handset and handsfree mode
o Noise Reduction in sound recording mode for 8/16/24/32/44.1/48 KHz signals
Specifications
o 0.11um low power process
o Operation voltages
IO:1.8V~3.3V digital input/output.
Core: built-in LDO provide power for internal core voltage.
o Packages:
25 ball WLCSP Package, 2.966×2.966 mm
2
, 0.45mm ball pitch
NR2048
www.acoustic-s.com Date: 02/07/2020 Version: 1.0
Inbound Voice from
far-end
Outbound Voice
towards far-end
Acoustic Echo Canceller
Yes
2- and 3- microphone Beamforming
Yes
Stationary and Non-Stationary Noise Reduction Yes Yes
Far field pickup for conferencing/recording
Yes
Automatic Gain Control Yes Yes
Audio Equalization Yes Yes
Dynamic Range Control
Yes Yes
Ambient noise-cued Adaptive Speech Enhancement (BVE) Yes
Wideband(HD) and Narrowband Voice Processing
Yes Yes
Voice Recognition Enhance mode
Yes
8KHz, 16KHz, 24KHz, 32KHz, 44.1KHz, and 48KHz
Sound Recording with Noise Reduction
Yes
NR2048 Voice Processing Capability
Summary of NR2048 Voice Processing Functions
NR2048
www.acoustic-s.com Date: 02/07/2020 Version: 1.0
1.3 Pin Configuration
Figure 1: 25-pin WLCSP Pin Configuration - Bottom View
MCLK
VDDC VDD
TEST SCL
RST_ SDA
A
B
C
D
12
3
45
E
I2S_DOU T0I2S_DOU T1I2S_DIN1
I2S_DOU T2
DMIC_DIN0
I2S_BCLK0I2S_DIN0VSSDDMIC_IN_CLK
I2S_LRCLK0
I2S_DIN2
DMIC_OU T_CLK
I2S_BCLK1
DMIC_OU T0
DMIC_OU T1
I2S_LRCLK1
I2S_BCLK2I2S_LRCLK2
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