Pith Number

pith:CRZPAPKX

pith:2025:CRZPAPKXJPOXLUEXGPFLJY3DFI

not attested not anchored not stored refs resolved

Ovi: Twin Backbone Cross-Modal Fusion for Audio-Video Generation

Calder Katyal, Chetwin Low, Weimin Wang

Ovi generates audio and video together in one process by fusing twin identical diffusion transformers block by block.

arxiv:2510.01284 v1 · 2025-09-30 · cs.MM · cs.CV · cs.SD · eess.AS

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\pithnumber{CRZPAPKXJPOXLUEXGPFLJY3DFI}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

By using blockwise cross-modal fusion of twin-DiT modules, Ovi achieves natural synchronization and removes the need for separate pipelines or post hoc alignment.

C2weakest assumption

That initializing an audio tower with an architecture identical to a strong pretrained video model and then jointly training via bidirectional cross-attention on a vast video corpus will produce reliable cross-modal timing and semantic alignment without additional alignment losses or post-processing.

C3one line summary

A single generative model uses twin DiT backbones with blockwise cross-attention and scaled-RoPE timing exchange to synthesize synchronized audio-video directly.

References

20 extracted · 20 resolved · 6 Pith anchors

[1] Seed-TTS: A Family of High-Quality Versatile Speech Generation Models · arXiv:2406.02430

[2] com/research/video-generation-models-as-world-simulators 2025

[3] HuMo: Human-centric video generation via collaborative multi-modal conditioning

[4] CosyVoice: A Scalable Multilingual Zero-shot Text-to-speech Synthesizer based on Supervised Semantic Tokens · arXiv:2407.05407

[5] Ace-step: A step towards music generation foundation model.arXiv preprint arXiv:2506.00045

Formal links

2 machine-checked theorem links

Cited by

20 papers in Pith

PhyAVBench: A Challenging Audio Physics-Sensitivity Benchmark for Physically Grounded Text-to-Audio-Video Generation

Omni-Customizer: End-to-End MultiModal Customization for Joint Audio-Video Generation

InstructAV2AV: Instruction-Guided Audio-Video Joint Editing

AVI-Edit: Audio-sync Video Instance Editing with Granularity-Aware Mask Refiner

PhyAVBench: A Challenging Audio Physics-Sensitivity Benchmark for Physically Grounded Text-to-Audio-Video Generation

Receipt and verification

First computed	2026-05-17T23:38:46.035192Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1472f03d574bdd75d09733cab4e3632a17170d01c6e39b857b36a5aa06a2afc4

Aliases

arxiv: 2510.01284 · arxiv_version: 2510.01284v1 · doi: 10.48550/arxiv.2510.01284 · pith_short_12: CRZPAPKXJPOX · pith_short_16: CRZPAPKXJPOXLUEX · pith_short_8: CRZPAPKX

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/CRZPAPKXJPOXLUEXGPFLJY3DFI \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 1472f03d574bdd75d09733cab4e3632a17170d01c6e39b857b36a5aa06a2afc4

Canonical record JSON

{
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    "abstract_canon_sha256": "7ce7d15b63daa02ae8b8851c614d09cbf19336f1adae2c17ef4b109714a5f876",
    "cross_cats_sorted": [
      "cs.CV",
      "cs.SD",
      "eess.AS"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.MM",
    "submitted_at": "2025-09-30T21:03:50Z",
    "title_canon_sha256": "eaf2258893cf6399b57c826c3db6ad000d9d95ddfa1b691dfd5fb7a996ec484a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2510.01284",
    "kind": "arxiv",
    "version": 1
  }
}