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| library_name: pytorch |
| license: apache-2.0 |
| --- |
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| # DS-CNN Keyword Spotting (Ambarella N1-655 CVflow v3 NVP) |
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| Depthwise Separable Convolutional Neural Network (DS-CNN) for 12-class Keyword Spotting (KWS) on 1-second 16 kHz audio clips, trained on the Google Speech Commands dataset. |
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| Original paper: [Hello Edge: Keyword Spotting on Microcontrollers](https://arxiv.org/abs/1711.07128) |
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| Model Configuration: |
| - Reference implementation: [https://github.com/ARM-software/ML-KWS-for-MCU](https://github.com/ARM-software/ML-KWS-for-MCU) |
| - Original Weight: [https://huggingface.co/EclipseAidge/ds_cnn](https://huggingface.co/EclipseAidge/ds_cnn) |
| - Dataset: Google Speech Commands v0.02 (CC-BY-4.0) |
| - License: Apache-2.0 (`LICENSE`) |
| - Support Cooper version: |
| - CNNGen: `[3.9.0 / n1-655x]` (`cavalry_gen 3.0.4`) |
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| ## Upstream Attribution & Modification Notice |
| - **Upstream Copyright**: Copyright (c) Arm Limited and Contributors (`ARM-software/ML-KWS-for-MCU`), MLCommons Association (`mlcommons/tiny`), and Eclipse Aidge (`EclipseAidge/ds_cnn`), licensed under the Apache License, Version 2.0. Trained on Google Speech Commands v0.02 (Creative Commons Attribution 4.0 International, Copyright Google LLC). |
| - **Modification Notice (Apache-2.0 Section 4(b))**: Modified by Ambarella International LLC (2026). Transposed input layout to NCHW `[1, 1, 49, 10]` IEEE FP16 and compiled via Ambarella Cooper SDK CNNGen 3.9.0 (`cavalry_gen 3.0.4`) into CVflow v3 N1-655 (`vdg_arch = 0xB`) Cavalry DAG binary format (`n1-655_kws_dscnn_amba_optimized.bin`). |
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| ## NVP Port & Runtime Specification |
| - **Target SoC**: Ambarella N1-655 (`vdg_arch = 0xB`, CVflow v3 `cavalry_gen` 3.0.4) |
| - **Input port**: `StatefulPartitionedCall_functional_1_conv2d_BiasAdd_in0` `[1, 1, 49, 10]` IEEE FP16 (1 s @ 16 kHz, 40 ms window, 20 ms hop, 40 HTK Mel bins [20..4000 Hz], DCT-II top 10 MFCCs) |
| - **Output port**: `dense` `[1, 12]` IEEE FP16 (12 Speech Commands classes: `silence`, `unknown`, `yes`, `no`, `up`, `down`, `left`, `right`, `on`, `off`, `stop`, `go`) |
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| | Model | Device | Compression | Model Link | |
| | :---: | :---: | :---: | :--- | |
| | DSCNN | N1-655 | Amba_optimized | [Model_Link](https://huggingface.co/cchiou-amba/DSCNN/blob/main/n1-655_kws_dscnn_amba_optimized.bin) | |
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