DNR6521x-VC1¶
Single-Channel Ultra-Low Latency AI Deep Noise Reduction Processor with Integrated USB and I2S Interfaces
1. Introduction¶
1.1 Product Description¶
DNR6521x is a high-performance AI deep noise reduction product based on XMOS processor architecture, designed to provide audio equipment manufacturers with exceptional audio processing capabilities. The product integrates two independently optimized AI noise reduction models.
- The strong noise reduction model employs deep neural network architecture to effectively process 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 I2S audio input and can simultaneously output to USB and I2S interfaces, widely applicable to live streaming equipment, conference systems, recording devices, outdoor sports DV, and other application fields
1.2 Product Features¶
Audio Performance Features
- AI Deep Noise Reduction
- Eliminates various stationary and non-stationary noises, adapts to complex acoustic environments
- Effectively eliminates sudden noises such as key sounds, keyboard sounds, footstep sounds
- Dual AI Noise Reduction Models
- Strong noise reduction model suitable for complex acoustic scenarios: outdoor recording, gaming, etc.
- Singing noise reduction model suitable for indoor live streaming, singing or interview scenarios
- Ultra-Low Latency Real-Time Processing
- Strong noise reduction model latency <50ms, meets audio-video synchronization requirements
- Singing noise reduction model latency <11ms, meets strict live singing requirements
- High-Fidelity Voice Restoration
- Strong noise reduction model completely preserves voice characteristics
- Singing noise reduction model not only completely preserves voice characteristics but also completely preserves singing tail 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 such as Windows, Linux, Android, macOS, and iOS
- No special driver installation required
Codec Support
- Supports NAU88l21
1.3 Application Scenarios¶
- Live Streaming Equipment
- Effectively suppresses various environmental noises, adapts to diverse live streaming scenarios
- Gaming Headsets
- Eliminates keyboard sounds, 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 calling and recording experience for outdoor sports enthusiasts
- Outdoor Recording Equipment
- Achieves high-quality recording in complex outdoor acoustic environments, meeting professional requirements for on-site interviews and content creation
- Conference System Equipment
- Processes background noise such as air conditioning sounds and footstep sounds 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 |
|---|---|---|---|---|---|
| DNR65211-VC1 | DNR65211-VC1 | SMT LGA-52 | 13x13mm | A316-Mini-V1 | Single-channel ultra-low latency AI deep noise reduction processor with integrated USB and I2S interfaces, singing + strong noise reduction models, 3-level noise reduction |
| DNR65212-VC1 | DNR65212-VC1 | SMT LGA-52 | 13x13mm | A316-Mini-V1 | Single-channel ultra-low latency AI deep noise reduction processor with integrated USB and I2S interfaces, strong noise reduction model, 2-level noise reduction |
2. Modes and Specifications¶
2.1 Supported Input/Output Modes¶
| Mode Number | Input/Output Mode | Description |
|---|---|---|
| 1 | I²S In(Master) → Ai DNR → USB(UAC2.0) I²S In(Master) → Ai DNR → I²S Out(Master) | Supports USB and I²S input, USB and I²S output, 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 |
| Sampling Rate | 48KHz/24bit | 48kHz/24bit |
| Bit Depth | Fixed 24bit | Fixed 24bit |
2.2.2 Supported Codec¶
- This product is compatible with NAU88l21 codec
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 real-time spectrum analysis, intelligent voice and noise component identification | Based on strong noise reduction model, specially optimized for music scene processing, preserves singing tone and timbre characteristics | Frequency domain filtering method, based on statistical models and fixed algorithm parameters |
| Processing Latency | < 50ms meets audio-video synchronization | < 11ms ultra-low latency | Medium latency |
| Noise Processing Capability | Effectively processes stationary and non-stationary noise | Specially optimized for music content processing | Limited capability for non-stationary noise |
| Voice Fidelity | Completely preserves voice characteristics | Completely preserves singing tail tone details | Possible audio quality loss |
| Environmental Adaptability | Processes various complex acoustic environments | Specially optimized for music scenarios | Suitable for relatively stable acoustic environments |
| Typical Applications | Outdoor live streaming equipment, gaming headsets, conference systems, professional recording equipment | Indoor live streaming equipment, karaoke equipment, music recording, online interview systems | Traditional telephone systems, basic conference equipment, basic audio processing |
3. Pin Configuration and Functions¶
3.1 DNR6521x_VC1 Pin Layout¶
3.2 DNR6521x_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 DNR65211 function definition {Low noise level LED indicator Slow blink: Singing noise reduction model Constant on: Strong noise reduction model} DNR65212 function definition {Noise reduction off LED indicator, constant on} |
| 10 | X0D35 | I | I²S_IN_SCLK(MASTER, connect to NAU88L21) |
| 11 | X0D36 | I | I²S_IN_LRCLK(MASTER, connect to NAU88L21) |
| 12 | X0D37 | I/O | I²S_IN_DATA0(MASTER, connect to NAU88L21) |
| 13 | X0D38 | O | I²S_OUT_DATA0(MASTER, connect to NAU88L21) |
| 14 | X0D40 | I/O | Active low DNR65211 function definition {Short press to cycle through noise reduction strength: Off, Low, Medium, High Long press: Switch noise reduction model} DNR65212 function definition {Short press to cycle through noise reduction strength: Off, Low, High} |
| 15 | X0D39 | I | I²S_OUT_MCLK(MASTER, connect to NAU88L21) |
| 16 | X0D42 | I/O | Microphone MUTE_SW, active low, turns off MIC input |
| 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 DNR65211 function definition {Medium noise level LED indicator Slow blink: Singing noise reduction model Constant on: Strong noise reduction model} DNR65212 function definition {Low noise level LED indicator, constant on} |
| 22 | X0D31 | I/O | Active low DNR65211 function definition {High noise level LED indicator Slow blink: Singing noise reduction model Constant on: Strong noise reduction model} DNR65212 function definition {High noise level LED indicator, constant on} |
| 23 | X0D32 | I/O | SPK volume +, active low |
| 24 | X0D33 | I/O | SPK volume -, active low |
| 25 | GND | P | Module ground |
| 26 | GND | P | Module ground |
| 27 | GND | P | Module ground |
| 28 | X0D00 | I/O | I2C_SCL(connect to NAU88L21) |
| 29 | X0D11 | I/O | I2C_SDA(connect to NAU88L21) |
| 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 | O | XU316 internal clock output, connect 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 types in 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. reference design¶
6. Product Packaging Information¶
Tray + Outer Box Packaging
7. Revision History¶
| Version | Date | Description | Author |
|---|---|---|---|
| V1.0 | 2025-08-10 | Initial version release | |
8. Inquiry and Feedback¶
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