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 silent video


SightSound-R1: Cross-Modal Reasoning Distillation from Vision to Audio Language Models

arXiv.org Artificial Intelligence

While large audio-language models (LALMs) have demonstrated state-of-the-art audio understanding, their reasoning capability in complex soundscapes still falls behind large vision-language models (LVLMs). Compared to the visual domain, one bottleneck is the lack of large-scale chain-of-thought audio data to teach LALM stepwise reasoning. To circumvent this data and modality gap, we present SightSound-R1, a cross-modal distillation framework that transfers advanced reasoning from a stronger LVLM teacher to a weaker LALM student on the same audio-visual question answering (AVQA) dataset. SightSound-R1 consists of three core steps: (i) test-time scaling to generate audio-focused chains of thought (CoT) from an LVLM teacher, (ii) audio-grounded validation to filter hallucinations, and (iii) a distillation pipeline with supervised fine-tuning (SFT) followed by Group Relative Policy Optimization (GRPO) for the LALM student. Results show that SightSound-R1 improves LALM reasoning performance both in the in-domain AVQA test set as well as in unseen auditory scenes and questions, outperforming both pretrained and label-only distilled baselines. Thus, we conclude that vision reasoning can be effectively transferred to audio models and scaled with abundant audio-visual data.


MuteSwap: Visual-informed Silent Video Identity Conversion

arXiv.org Artificial Intelligence

Conventional voice conversion modifies voice characteristics from a source speaker to a target speaker, relying on audio input from both sides. However, this process becomes infeasible when clean audio is unavailable, such as in silent videos or noisy environments. In this work, we focus on the task of Silent Face-based Voice Conversion (SFVC), which does voice conversion entirely from visual inputs. i.e., given images of a target speaker and a silent video of a source speaker containing lip motion, SFVC generates speech aligning the identity of the target speaker while preserving the speech content in the source silent video. As this task requires generating intelligible speech and converting identity using only visual cues, it is particularly challenging. To address this, we introduce MuteSwap, a novel framework that employs contrastive learning to align cross-modality identities and minimize mutual information to separate shared visual features. Experimental results show that MuteSwap achieves impressive performance in both speech synthesis and identity conversion, especially under noisy conditions where methods dependent on audio input fail to produce intelligible results, demonstrating both the effectiveness of our training approach and the feasibility of SFVC.


UniForm: A Unified Diffusion Transformer for Audio-Video Generation

arXiv.org Artificial Intelligence

As a natural multimodal content, audible video delivers an immersive sensory experience. Consequently, audio-video generation systems have substantial potential. However, existing diffusion-based studies mainly employ relatively independent modules for generating each modality, which lack exploration of shared-weight generative modules. This approach may under-use the intrinsic correlations between audio and visual modalities, potentially resulting in sub-optimal generation quality. To address this, we propose UniForm, a unified diffusion transformer designed to enhance cross-modal consistency. By concatenating auditory and visual information, UniForm learns to generate audio and video simultaneously within a unified latent space, facilitating the creation of high-quality and well-aligned audio-visual pairs. Extensive experiments demonstrate the superior performance of our method in joint audio-video generation, audio-guided video generation, and video-guided audio generation tasks. Our demos are available at https://uniform-t2av.github.io/.


Synthesizing Audio from Silent Video using Sequence to Sequence Modeling

arXiv.org Artificial Intelligence

Generating audio from a video's visual context has multiple practical applications in improving how we interact with audio-visual media - for example, enhancing CCTV footage analysis, restoring historical videos (e.g., silent movies), and improving video generation models. We propose a novel method to generate audio from video using a sequence-to-sequence model, improving on prior work that used CNNs and WaveNet and faced sound diversity and generalization challenges. Our approach employs a 3D Vector Quantized Variational Autoencoder (VQ-VAE) to capture the video's spatial and temporal structures, decoding with a custom audio decoder for a broader range of sounds. Trained on the Youtube8M dataset segment, focusing on specific domains, our model aims to enhance applications like CCTV footage analysis, silent movie restoration, and video generation models.


Human Detection of Political Speech Deepfakes across Transcripts, Audio, and Video

arXiv.org Artificial Intelligence

Recent advances in technology for hyper-realistic visual effects provoke the concern that deepfake videos of political speeches will soon be visually indistinguishable from authentic video recordings. The conventional wisdom in communication theory predicts people will fall for fake news more often when the same version of a story is presented as a video versus text. We conduct 4 pre-registered randomized experiments with 2,015 participants to evaluate how accurately humans distinguish real political speeches from fabrications across base rates of misinformation, audio sources, and media modalities. We find base rates of misinformation minimally influence discernment and deepfakes with audio produced by the state-of-the-art text-to-speech algorithms are harder to discern than the same deepfakes with voice actor audio. Moreover, we find audio and visual information enables more accurate discernment than text alone: human discernment relies more on how something is said, the audio-visual cues, than what is said, the speech content.


Artificial Intelligence Can Create Sound Tracks for Silent Videos

#artificialintelligence

Researchers Ghose and Prevost created a deep learning algorithm which, given a silent video, can generate a realistic sounding synchronized soundtrack. Frequently, movies had added sound effects which were not recorded during after the recording to make it feel more realistic in a process called "Foley". Researchers at the university of Texas turned to deep learning to automate this process. They trained a neural network on 12 popular movie events where directors frequently add Foley effects. Their neural network classifies the class of the sound to generate, and also has a sequential network that generates the sound.


Researchers' AI system infers music from silent videos of musicians

#artificialintelligence

In a study accepted to the upcoming 2020 European Conference on Computer Vision, MIT and MIT-IBM Watson AI Lab researchers describe an AI system -- Foley Music -- that can generate "plausible" music from silent videos of musicians playing instruments. They say it works on a variety of music performances and outperforms "several" existing systems in generating music that's pleasant to listen to. It's the researchers' belief an AI model that can infer music from body movements could serve as the foundation for a range of applications, from adding sound effects to videos automatically to creating immersive experiences in virtual reality. Studies from cognitive psychology suggest humans possess this skill -- even young children report that what they hear is influenced by the signals they receive from seeing a person speak, for example. Foley Music extracts 2D key points of people's bodies (25 total points) and fingers (21 points) from video frames as intermediate visual representations, which it uses to model body and hand movements.


Lipper: Synthesizing Thy Speech using Multi-View Lipreading

arXiv.org Machine Learning

Lipreading has a lot of potential applications such as in the domain of surveillance and video conferencing. Despite this, most of the work in building lipreading systems has been limited to classifying silent videos into classes representing text phrases. However, there are multiple problems associated with making lipreading a text-based classification task like its dependence on a particular language and vocabulary mapping. Thus, in this paper we propose a multi-view lipreading to audio system, namely Lipper, which models it as a regression task. The model takes silent videos as input and produces speech as the output. With multi-view silent videos, we observe an improvement over single-view speech reconstruction results. We show this by presenting an exhaustive set of experiments for speaker-dependent, out-of-vocabulary and speaker-independent settings. Further, we compare the delay values of Lipper with other speechreading systems in order to show the real-time nature of audio produced. We also perform a user study for the audios produced in order to understand the level of comprehensibility of audios produced using Lipper.


Google's odd new Clips is like a robot camera that makes silent videos

USATODAY - Tech Top Stories

Jefferson Graham is in the hands-on room at the Made by Google event in San Francisco, showing off new phones, speakers, computer and a camera with a built-in "Google Assistant." SAN FRANCISCO -- Google is getting into the camera business, but Clips is unlike any camera you might have ever seen. Spend some time with it, and you'll have questions about it. The $249 Google Clips looks like a teeny GoPro, but acts very differently. As a photographer, you don't choose the shot--the camera does it for you.


MIT lab uses artificial intelligence to let computer add sound effects to videos - The Boston Globe

#artificialintelligence

MIT researchers have developed a computer system that independently adds realistic sounds to silent videos. Although the technology is nascent, it's a step toward automating sound effects for movies. In a series of videos of drumsticks striking things -- including sidewalks, grass, and metal surfaces -- the computer learned to pair a fitting sound effect, such as the sound of a drumstick hitting a piece of wood or rustling leaves. The findings are an example of the power of deep learning, a type of artificial intelligence whose application is trendy in tech circles. With deep learning, a computer system learns to recognize patterns in huge piles of data and applies what it learns in useful ways.