metadata.json

{
  "model": "Streaming Sortformer 4-spk v2 (NVIDIA)",
  "license": "cc-by-4.0",
  "sample_rate": 16000,
  "n_mels": 128,
  "n_fft": 512,
  "win_length": 400,
  "hop": 160,
  "preemph": 0.97,
  "normalize": "NA",
  "mag_power": 2.0,
  "log_guard": 5.960464477539063e-08,
  "pad_to": 16,
  "subsampling_factor": 8,
  "frame_hop_ms": 80,
  "n_spk": 4,
  "spkcache_len": 188,
  "fifo_len": 0,
  "chunk_len": 188,
  "chunk_left_context": 1,
  "chunk_right_context": 1,
  "spkcache_update_period": 188,
  "spkcache_sil_frames_per_spk": 3,
  "scores_boost_latest": 0.05,
  "sil_threshold": 0.2,
  "pred_score_threshold": 0.25,
  "strong_rate": 0.75,
  "weak_rate": 1.5,
  "min_pos_rate": 0.5,
  "max_index": 99999,
  "tf_max": 1520,
  "spk": 188,
  "pe_max": 190,
  "t": 378,
  "graph_io": "chunk_mel[1,1520,128],spkcache[1,188,512],valid[1,378] -> preds[1,378,4],chunk_pe[1,190,512]",
  "golden": {
    "mel_shape": [
      128,
      2160
    ],
    "mel_len": 2150,
    "total_preds_shape": [
      270,
      4
    ]
  },
  "note": "host: NeMo 128-mel (preemph->stft512/win400/hop160->slaney mel->log, normalize=NA) -> feat_chunks (188*8, L/R ctx 1) -> per chunk zero-pad mel to 1520, build spkcache(188)+valid, run graph, slice chunk preds, streaming_update + AOSC compress_spkcache; threshold 0.5/frame/spk (frame=80ms) -> speaker turns."
}