card: add PESQ column + bitrate-vs-UTMOSv2 plot
Browse files
README.md
CHANGED
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@@ -48,14 +48,16 @@ codecs span a ~30× bitrate range. DAC/NeMo/EnCodec are high-bitrate multi-codeb
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*acoustic* codecs; WideCodec is a **single-codebook, 50-tokens/s** code at **~0.8 kbps** —
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the only one here whose token stream an autoregressive LLM/TTS model can practically predict.
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**Bitrate = frame-rate × Σ log₂(codebook size).** WideCodec's FSQ is `levels=[4]×8,
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num_quantizers=1` → 8·log₂4 = **16 bits/frame** × 50 frames/s = **800 bps = 0.8 kbps**
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*acoustic* codecs; WideCodec is a **single-codebook, 50-tokens/s** code at **~0.8 kbps** —
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the only one here whose token stream an autoregressive LLM/TTS model can practically predict.
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| codec | native SR | tokens/s | codebooks | ~bitrate | UTMOSv2 | PESQ-WB ↑ | mel-L1 ↓ | HF≥11k | rolloff |
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|---|--:|--:|--:|--:|--:|--:|--:|--:|--:|
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| ground truth | — | — | — | — | 2.822 | — | — | 0.00244 | 8263 |
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| nvidia nemo44k | 44.1k | ~86 | RVQ (many) | ~6–9 kbps | **2.903** | **3.880** | 0.379 | 0.00196 | 8372 |
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| **WideCodec (ours, gs-2.0M)** | 44.1k | **50** | **1** | **~0.8 kbps** | **2.788** | 2.079 | 0.571 | 0.00223 | 9011 |
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| dac | 44.1k | 86 | 9 | ~8 kbps | 2.672 | 3.874 | **0.341** | 0.00156 | 8185 |
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| snac44k | 44.1k | multi-scale | 3–4 | ~2.6 kbps | 2.340 | 2.600 | 0.493 | 0.00158 | 8402 |
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| encodec48k | 48k | 150 | RVQ | 24 kbps | 2.042 | 3.115 | 0.458 | 0.00169 | 8800 |
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**Bitrate = frame-rate × Σ log₂(codebook size).** WideCodec's FSQ is `levels=[4]×8,
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num_quantizers=1` → 8·log₂4 = **16 bits/frame** × 50 frames/s = **800 bps = 0.8 kbps**
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