DNR65221-VC1¶
Single-Channel Ultra-Low Latency AI Deep Noise Reduction Processor with Integrated USB and PDM Interface
1. Introduction¶
1.1 Product Description¶
DNR65221-VC1 is a high-performance AI deep noise reduction product based on XMOS processor architecture, designed to provide exceptional audio processing capabilities for audio device manufacturers. The product integrates two independently optimized AI noise reduction models.
- The Strong Noise Reduction model employs a deep neural network architecture capable of effectively processing various stationary and non-stationary noises in complex acoustic environments, achieving maximum noise suppression while ensuring high voice fidelity
- The Singing Noise Reduction model reduces processing latency to 11 milliseconds through lightweight design, effectively suppressing background noise while completely preserving vocal characteristics
- The product supports PDM audio input with simultaneous output to USB interface, widely applicable to live streaming devices, conference systems, recording equipment, outdoor sports cameras, and many other application fields
1.2 Product Features¶
Audio Performance Features
- AI Deep Noise Reduction
- Eliminates various stationary and non-stationary noises, adapting to complex acoustic environments
- Effectively eliminates sudden noises such as button clicks, keyboard typing, and footsteps
- Dual AI Noise Reduction Models
- Strong Noise Reduction model for complex acoustic scenarios: outdoor recording, gaming, and similar scenes
- Singing Noise Reduction model for indoor live singing or interview scenarios
- Ultra-Low Latency Real-Time Processing
- Strong Noise Reduction model latency <50ms, meeting lip-sync requirements
- Singing Noise Reduction model latency <11ms, meeting strict live singing requirements
- High-Fidelity Voice Reproduction
- Strong Noise Reduction model completely preserves voice characteristics
- Singing Noise Reduction model not only preserves voice characteristics but also completely retains vocal trailing tones
USB Interface Features
- Supports UAC 2.0
- Supports OTG connection
- Plug-and-play, no driver installation required
- Supports HID configuration
System Compatibility
- Supports multiple operating systems including Windows, Linux, Android, macOS, and iOS
- No special driver installation required
1.3 Application Scenarios¶
- Live Streaming Devices
- Effectively suppresses various environmental noises, adapting to diverse streaming scenarios
- Gaming Headsets
- Eliminates keyboard noise, mouse clicks, and background noise, providing clear teammate communication experience
- Outdoor Sports Equipment
- Suppresses wind noise and environmental noise interference in sports scenarios, providing clear call and recording experience for outdoor sports enthusiasts
- Outdoor Recording Equipment
- Achieves high-quality recording in complex outdoor acoustic environments, meeting professional needs for on-site interviews and content creation
- Conference System Equipment
- Processes background noises such as air conditioning and footsteps in office environments
- Communication Devices
- Suitable for business calls with strict real-time requirements, providing imperceptible latency voice processing experience
1.4 Product Functional Block Diagram¶
1.5 Ordering Information¶
| PRODUCT MODEL | ORDERING NUMBER | PACKAGE BODY | SIZE (NOM) | Hardware Model | Comments |
|---|---|---|---|---|---|
| DNR65221-VC1 | DNR65221-VC1 | SMT LGA-52 | 13x13mm | A316-Mini-V1 | Single-Channel Ultra-Low Latency AI Deep Noise Reduction Processor with Integrated USB and PDM Interface |
2. Modes and Specifications¶
2.1 Supported Input/Output Modes¶
| Mode Number | Input/Output Mode | Description |
|---|---|---|
| 1 | I²S In(Master) → USB(UAC2.0) I²S In(Master) → I²S Out(Master) | Supports USB and I²S input, USB and I²S output, with internal AI noise reduction |
2.2 Detailed Parameters for Each Operating Mode¶
2.2.1 USB(UAC2.0) ←→ I²S(Master) Mode¶
Input/Output Parameters:
| Parameter | Input/Output | Input/Output |
|---|---|---|
| Interface | USB Audio Class 2.0 | I²S(Master) |
| Audio Format | PCM | PCM |
| Sample Rate | 48KHz/24bit | 48kHz/24bit |
| Bit Depth | Fixed 24bit | Fixed 24bit |
2.3 Noise Reduction Performance Comparison¶
| Comparison Dimension | Strong Noise Reduction Model | Singing Noise Reduction Model | Traditional Noise Reduction Technology |
|---|---|---|---|
| Technical Principle | Deep neural network architecture, AI algorithm analyzes spectral features in real-time, intelligently identifying voice and noise components | Based on Strong Noise Reduction model, specially optimized for music scene processing, preserving vocal pitch and timbre characteristics | Frequency domain filtering methods, based on statistical models and fixed algorithm parameters |
| Processing Latency | < 50ms, meeting lip-sync requirements | < 11ms, ultra-low latency | Moderate latency |
| Noise Processing Capability | Effectively processes stationary and non-stationary noise | Specially optimized for music content processing | Limited capability for non-stationary noise processing |
| Voice Fidelity | Completely preserves voice characteristics | Completely preserves vocal trailing tone details | May experience audio quality loss |
| Environmental Adaptability | Processes various complex acoustic environments | Specially optimized for music scenarios | Suitable for relatively stable acoustic environments |
| Typical Applications | Outdoor streaming devices, gaming headsets, conference systems, professional recording equipment | Indoor streaming devices, karaoke equipment, music recording, online interview systems | Traditional telephone systems, basic conference equipment, fundamental audio processing |
3. Pin Configuration and Functions¶
3.1 DNR65221_VC1 Pin Layout¶
3.2 DNR65221_VC1 Pin Description¶
| Pin Number | Name | Type | Function |
|---|---|---|---|
| 1 | 3.3V | P | Module 3.3V power supply |
| 2 | X1D13 | I/O | NC |
| 3 | X1D16 | I/O | NC |
| 4 | GND | P | Module ground |
| 5 | X1D17 | I/O | NC |
| 6 | X1D18 | I/O | NC |
| 7 | X1D19 | I/O | NC |
| 8 | X1D22 | I/O | NC |
| 9 | X0D29 | I/O | Active low Low noise reduction level LED indicator Slow flash: Singing Noise Reduction model. Steady on: Strong Noise Reduction model |
| 10 | X0D35 | I | NC |
| 11 | X0D36 | I | NC |
| 12 | X0D37 | I/O | NC |
| 13 | X0D38 | O | NC |
| 14 | X0D40 | I/O | Active low Short press to cycle through noise reduction intensity: Off, Low, Medium, High. Long press: Switch noise reduction model. |
| 15 | X0D39 | I | NC |
| 16 | X0D42 | I/O | Microphone MUTE_SW, active low |
| 17 | X0D41 | I/O | Microphone volume +, active low |
| 18 | X0D43 | I/O | Microphone volume -, active low |
| 19 | X1D34 | I/O | NC |
| 20 | GND | P | Module ground |
| 21 | X0D30 | I/O | Active low Medium noise reduction level LED indicator Slow flash: Singing Noise Reduction model. Steady on: Strong Noise Reduction model |
| 22 | X0D31 | I/O | Active low High noise reduction level LED indicator Slow flash: Singing Noise Reduction model. Steady on: Strong Noise Reduction model |
| 23 | X0D32 | I/O | PDM_DATA IN |
| 24 | X0D33 | I/O | NC |
| 25 | GND | P | Module ground |
| 26 | GND | P | Module ground |
| 27 | GND | P | Module ground |
| 28 | X0D00 | I/O | PDM_CLK |
| 29 | X0D11 | I/O | NC |
| 30 | X1D00 | I/O | NC |
| 31 | X1D01 | I/O | NC |
| 32 | GND | P | Module ground |
| 33 | X1D09 | I/O | NC |
| 34 | X1D10 | I/O | NC |
| 35 | X1D11 | I/O | XU316 internal clock output, connects to X0D39 |
| 36 | GND | P | Module ground |
| 37 | GND | P | Module ground |
| 38 | TDI | I/O | XTAG debug PIN |
| 39 | TDO | I/O | XTAG debug PIN |
| 40 | TMS | I/O | XTAG debug PIN |
| 41 | TCK | I/O | XTAG debug PIN |
| 42 | RST_N | I/O | System reset, active low |
| 43 | 1.8V | P | Module 1.8V power supply |
| 44 | GND | P | Module ground |
| 45 | USB_DM | I/O | USB_DM |
| 46 | USB_DP | I/O | USB_DP |
| 47 | GND | P | Module ground |
| 48 | 0.9V | P | Module 0.9V power supply |
| 49 | GND | P | Module ground |
| 50 | GND | P | Module ground |
| 51 | GND | P | Module ground |
| 52 | GND | P | Module ground |
Pin Type Description
I/O type definitions in the table: I=Input, O=Output, P=Power, I/O=Input/Output
4. Hardware Parameters¶
4.1 Normal Operating Conditions¶
| Function | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Operating Temperature | 0 | - | 70 | ℃ |
| 3.3V Operating Voltage | 3.0 | 3.3 | 3.6 | V |
| 1.8V Operating Voltage | 1.62 | 1.80 | 1.98 | V |
| 0.9V Operating Voltage | 0.855 | 0.90 | 0.945 | V |
4.2 Product Dimensions¶
13±0.1mm(L)X13±0.1mm(W)X0.8±0.1mm(H)
4.3 Module Package Diagram¶
5. Product Packaging Information¶
Tray + Outer Box Packaging
6. Revision History¶
| Version | Date | Description | Revised By |
|---|---|---|---|
| V1.0 | 2025-08-20 | Initial release | |
7. Inquiry and Feedback¶
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