REVIEW 3 major objections 8 minor 37 references
Relevance-guided Audio Visual Fusion for Video Saliency Prediction
T0 review · 3 major / 8 minor · reviewed 2026-08-12 · deepseek-v4-flash
Pith's one-line read This paper claims that relevance-gated audio fusion improves audio-visual video saliency prediction, with average gains of about 0.97% and 1.58% over CASP-Net on six eye-movement datasets.
desk verdict Competent incremental architecture with informative ablations, but the training-protocol ambiguity blurs the headline improvement over CASP-Net. read the letter →
The pith
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
The reading
What carries the argument
The load-bearing object is the Relevance-guided Audio-Visual feature Fusion (RAVF) block, a transformer-style cross-attention module whose retention maps $\mathrm{Ret}_A = V_Q A_K^\top / \sqrt{d_k}$ and $\mathrm{Ret}_V = A_Q V_K^\top / \sqrt{d_k}$ replace softmax and act as explicit gates on audio and visual values, with per-head weights $C_{\mathrm{weights}} = \mathrm{Softmax}(\mathrm{MLP}(\mathrm{Cat}(v2a_{\mathrm{attn}}, a2v_{\mathrm{attn}})))$. This mechanism directly controls how much audio survives into the fused representation, which is what lets the model suppress background music, while the Multi-scale feature Synergy and Multi-scale Regulator Gate modules refine and route the multi-scale visual features to the saliency decoder.
What would settle it
Re-run the six-dataset comparison with every method trained on the same per-dataset training splits, or jointly on the same six training sets with the same DHF1K pre-training, and identical test sets; if the average gains over CASP-Net shrink to noise, the relevance-gating claim is not supported. A second check is to present videos with a deliberately mismatched audio track and inspect whether the retention maps drop toward zero and whether the saliency map remains unchanged.
Extended reading notes
Core claim
The paper's central claim is that semantic relevance between audio and visual streams--not mere temporal synchronization--should govern audio-visual fusion for saliency prediction. AVRSP operationalizes this with a Relevance-guided Audio-Visual feature Fusion module in which two cross-attention retention maps, $\mathrm{Ret}_A$ and $\mathrm{Ret}_V$, measure how much each modality should keep of the other, replacing the softmax over attention scores so the retained amount is directly readable. The Multi-scale feature Synergy and Multi-scale Regulator Gate modules then enrich and route the fused information to the decoder. Evaluated on DIEM, Coutrot1, Coutrot2, AVAD, ETMD, and SumMe, the network outperforms the compared baselines, with the largest margins on DIEM and AVAD; the authors interpret this as evidence that relevance-guided fusion helps most on diverse, dynamic content.
Load-bearing premise
The load-bearing premise is that AVRSP and the comparison methods, especially CASP-Net, were trained and tested under the same data splits and evaluation protocol, so the reported average gains of 0.97% and 1.58% come from the new modules and not from different training data or test sets.
Editorial extensions
If this is right
- Audio-visual saliency models can stop treating all synchronized audio as useful; gating by relevance should prevent background-music scenes from pulling predictions off the visual subject.
- The visual-only variant also improves over visual-only baselines, indicating that the multi-scale synergy and regulator gate contribute independently of audio.
- On datasets with complex dynamic content such as DIEM and AVAD, the relevance-guided fusion produces the largest gains, suggesting the benefit grows with scene diversity.
- The reverse-window testing strategy lets the 32-frame model produce saliency maps for every frame, including the first 31, without retraining.
- Ablation results place RAVF above element-wise addition, multiplication, concatenation, bilinear fusion, and MBT, indicating that the relevance-gating design, not multi-modality alone, drives the improvement.
Reading between the lines
- A direct extension the paper does not run is to take a video with speech and swap in unrelated ambient audio, then check whether the retention maps fall and the prediction stays on the visual subject; this would isolate semantic relevance from low-level audio-visual correlation.
- The RAVF gating scheme could be lifted into other multimodal tasks, such as sound-source localization or video captioning, where background audio is a known failure mode, since the retention maps give a per-frame measure of modality trust.
- Because the absolute gains are under two percentage points averaged over metrics, the durable contribution is likely the design principle--relevance as an explicit gate--rather than a large accuracy margin on existing benchmarks.
Signed reviews
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The manuscript proposes AVRSP, a neural network for audio-visual video saliency prediction. The visual branch is a 3D S3D backbone with ASPP and LIP, and the audio branch is SoundNet; these are fused by a Relevance-guided Audio-Visual Fusion module (RAVF) that uses cross-attention with learned per-head relevance weights. Two additional modules, Multi-scale feature Synergy (MS) and Multi-scale Regulator Gate (MRG), enhance multi-scale visual features. The model is pre-trained on DHF1K and then trained on six audio-visual datasets. Experiments report results on DIEM, ETMD, AVAD, Coutrot1, Coutrot2, and SumMe, claiming average improvements of approximately 0.97% for the visual-only variant and 1.58% for the audio-visual variant over CASP-Net. Ablation studies on DIEM and AVAD validate the proposed modules and fusion strategy.
Significance. The paper addresses a real and relevant problem: audio-visual saliency prediction in the presence of irrelevant audio, such as background music. The RAVF module is a plausible mechanism for adaptively gating audio features based on cross-modal relevance, and the MS/MRG modules are reasonable extensions for integrating multi-scale visual features. The paper provides extensive experiments on six publicly available datasets, ablation studies for both the modules and alternative fusion methods, and visualizations of the learned relevance weights. If the training protocol is clarified and the dimensional issues in the fusion equations are resolved, the contribution would be a useful, if incremental, advance to the field. The current manuscript, however, does not fully support the central performance claim because of the underspecified training protocol and the ambiguities in the core fusion formulation.
major comments (3)
- [§III-B Eqs. (1)-(7)] The formulation of the RAVF module is dimensionally underspecified. The visual feature X0 is a 4D tensor with spatial dimensions H/32 × W/32 and temporal dimension Tv/8, while the audio feature Fa is a 1D sequence of length Ta. In Eqs. (4)-(5), v2a_attn therefore has the token count of the visual feature and a2v_attn has the token count of the audio feature. Eq. (6) concatenates these two tensors, but no pooling, reshaping, or token-count equalization is described, so the concatenation is only valid if the token counts coincide, which is not stated. Eq. (7) then multiplies Cweights with v2a_attn; if the concatenation was along the token dimension, the lengths differ and the product is undefined, while if it was along the channel dimension, the channel counts differ. The authors should specify the exact tensor shapes and operations at each step, including how the per-head weights are produced.
- [§IV-B, §IV-A, §IV-E] The training protocol for the main comparison is not specified. §IV-B says the visual branch is trained on DHF1K and then 'combined it with the audio branch and trained it on six audio-visual datasets for 100 epochs,' but it does not state whether the six datasets are pooled into one joint training set or trained per dataset, nor does it give train/test splits for Coutrot1, Coutrot2, AVAD, ETMD, and SumMe (only DIEM is split in §IV-A). The ablation study in §IV-E uses only the DIEM and AVAD training sets. If the main model is trained jointly on all six datasets while the baselines in Tables I-II are trained per dataset, AVRSP has a substantial data advantage, and the reported average gains (0.97% and 1.58% over CASP-Net in §IV-D) may not reflect the proposed modules. The authors should report the exact splits and training protocol, and ideally re-evaluate the baselines under the same protocol.
- [§IV-D, Tables I-II] The central performance claim is an average improvement of approximately 0.97% and 1.58% 'across all metrics' on the six datasets. The per-dataset results are not uniformly positive: for example, Ours(V) on ETMD has AUC-J 0.930 versus 0.938 for CASP-Net(V), and Ours(AV) on SumMe has AUC-J 0.903 versus 0.907 for CASP-Net(AV). Averaging across metrics and datasets without reporting per-metric standard deviations or significance tests makes the improvement claim difficult to interpret. The authors should report the per-metric average differences and, if possible, statistical significance (e.g., paired tests across videos or datasets) for the main comparison.
minor comments (8)
- [Abstract and throughout] The network name appears as 'A VRSP' in the abstract and 'AVRSP' elsewhere; use a single consistent spelling throughout the manuscript.
- [§III-B, Eq. (6)] The concatenation operation 'Cat' is not defined; state explicitly whether the concatenation is along the channel or sequence dimension and provide the resulting tensor shape.
- [§III-B, after Eq. (1)] The sentence 'The introduction of RetA and RetV represents the retention levels of the audio-value AV and visual-value VV' is misleading, since RetA and RetV are attention score matrices rather than scalar retention levels; rephrase for clarity.
- [§IV-C] The AUC-J metric is described only informally; provide the standard definition or a reference for the specific variant used.
- [§IV-B, Testing Details] The reverse window strategy is described only for the video frames; clarify how the corresponding audio segments are handled for the first 31 frames.
- [Figure 2] The tensor dimensions in Figure 2 are difficult to read in the preprint; ensure all dimension annotations are legible and consistent with the text.
- [§II-B, References [26],[27]] The related work discusses MTCAM [27], but this method is not included in the experimental comparison; either add it to the experiments or remove the mention.
- [§IV-B] The paper would benefit from a statement on code and model availability, as the current experimental details are insufficient for replication.
Circularity Check
No circularity found: the paper's empirical comparisons and ablations are self-contained, and the only flagged issue is an unverified training-protocol detail, which is a reproducibility concern rather than a circular derivation.
full rationale
The paper's central claim is an empirical performance comparison: AVRSP versus prior models on six audio-visual datasets. The proposed modules (RAVF, MS, MRG) are defined by explicit forward-pass equations (Eqs. 1-15) and trained with a supervised loss (Eq. 19) on ground-truth saliency maps; at test time the saliency predictions are compared with held-out eye-tracking data. Nothing in the methodology defines the predicted saliency map as the optimized value of a fitted parameter that is later reported as a prediction. The relevance weights RetA and RetV are learned intermediate activations of cross-attention, not quantities fitted to the final metric, so the interpretation of them as semantic relevance is a post-hoc description rather than a derivation. The comparison with CASP-Net and other baselines is vulnerable to a possible protocol mismatch because Section IV-B states only that the model was 'trained on six audio-visual datasets for 100 epochs' without specifying per-dataset train/test splits; this is a legitimate reproducibility and verifiability concern about whether the reported average improvement of about 1.58% is matched-protocol, but it is not circularity, because the baselines and the proposed method are both empirical systems evaluated on the same published datasets. The loss function overlaps with evaluation metrics (KL, CC, Sim), but this is standard supervised training rather than a constructional identity, since the model must still generalize to unseen test frames. There is one reference by an author (ref. [10], L. Yu), but it is used only as an example in the related-work survey and is not load-bearing for the paper's claims. No self-citation chain, uniqueness theorem, or ansatz-via-citation pattern is present, so the derivation chain is not equivalent to its inputs.
Assumptions & free parameters
free parameters (1)
- Loss weights alpha1 and alpha2 =
-0.1 each
assumptions (3)
- domain assumption S3D features, fine-tuned on DHF1K, are suitable visual representations for saliency prediction.
- domain assumption SoundNet features capture audio semantics that can be aligned with visual content for cross-attention.
- ad hoc to paper Omitting softmax in cross-attention still yields meaningful relevance scores because of the rescaling and residual connections.
Cite this review
Pith. "Pith review of Relevance-guided Audio Visual Fusion for Video Saliency Prediction." pith.science (2026). https://pith.science/paper/EAVCUYRK
@misc{pith2026241111454,
author = {Pith},
title = {Pith review of: Relevance-guided Audio Visual Fusion for Video Saliency Prediction},
year = {2026},
howpublished = {\url{https://pith.science/paper/EAVCUYRK}},
note = {Machine review of arXiv:2411.11454}
}
read the original abstract
Audio data, often synchronized with video frames, plays a crucial role in guiding the audience's visual attention. Incorporating audio information into video saliency prediction tasks can enhance the prediction of human visual behavior. However, existing audio-visual saliency prediction methods often directly fuse audio and visual features, which ignore the possibility of inconsistency between the two modalities, such as when the audio serves as background music. To address this issue, we propose a novel relevance-guided audio-visual saliency prediction network dubbed AVRSP. Specifically, the Relevance-guided Audio-Visual feature Fusion module (RAVF) dynamically adjusts the retention of audio features based on the semantic relevance between audio and visual elements, thereby refining the integration process with visual features. Furthermore, the Multi-scale feature Synergy (MS) module integrates visual features from different encoding stages, enhancing the network's ability to represent objects at various scales. The Multi-scale Regulator Gate (MRG) could transfer crucial fusion information to visual features, thus optimizing the utilization of multi-scale visual features. Extensive experiments on six audio-visual eye movement datasets have demonstrated that our AVRSP network achieves competitive performance in audio-visual saliency prediction.
Figures
Figures from the paper (3 more)
Reference graph
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Reviewed August 12, 2026 · model on record in the stance chip above.
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