models/ax620e/model_meta.json

{
  "name": "wakeup_nihao_aixin_ax620e",
  "framework": "ONNX",
  "task": "wake_word_detection",
  "route": "general",
  "inputs": [
    {
      "name": "fbank",
      "shape": [
        1,
        26,
        64
      ],
      "dtype": "float32",
      "layout": "NCHW"
    }
  ],
  "outputs": [
    {
      "name": "logits",
      "shape": [
        1,
        2,
        64
      ],
      "dtype": "float32"
    }
  ],
  "preprocess": "reference log-fbank: sample/32768 -> hann(512,periodic) -> rfft magnitude -> mel filterbank (26) -> log(x+1e-7) -> Q6.10 (q=x*1024/1024)",
  "postprocess": "wake word '你好，爱芯': wake score = logits[1, last]; 3-frame sliding sum vs threshold (0.608 DET_MODE_90 / 0.615 DET_MODE_95)",
  "sdk_interface": {
    "input": "int16 pcm mono 16k, 512 samples per frame",
    "output": "per-frame wake score + trigger event"
  },
  "hardware": "AX620E",
  "npu_mode": "NPU2",
  "training": "fine-tuned from WakeNet9 with edge-tts data (see model_convert/train/)"
}