🤖 AI Summary
Video streaming faces a fundamental trade-off between high visual quality and low latency. Conventional codecs, lacking contextual modeling capabilities, transmit all frame data, resulting in significant bandwidth redundancy. This paper proposes ELVIS, an end-to-end enhancement framework that introduces a novel collaborative paradigm: server-side rate-distortion-optimized encoding coupled with client-side generative reconstruction. Specifically, the server proactively discards redundant frames—e.g., low-motion regions—while the client reconstructs them using diffusion models or transformer-based generative techniques. ELVIS adopts a modular architecture, enabling flexible substitution of encoders, reconstruction models, and quality metrics (e.g., VMAF). Evaluated on standard benchmarks, ELVIS achieves a 11-point VMAF improvement and substantially reduces bandwidth requirements at equivalent perceptual quality. The framework establishes a scalable architectural foundation for integrating generative AI into real-time streaming systems.
📝 Abstract
The primary challenge of video streaming is to balance high video quality with smooth playback. Traditional codecs are well tuned for this trade-off, yet their inability to use context means they must encode the entire video data and transmit it to the client. This paper introduces ELVIS (End-to-end Learning-based VIdeo Streaming Enhancement Pipeline), an end-to-end architecture that combines server-side encoding optimizations with client-side generative in-painting to remove and reconstruct redundant video data. Its modular design allows ELVIS to integrate different codecs, inpainting models, and quality metrics, making it adaptable to future innovations. Our results show that current technologies achieve improvements of up to 11 VMAF points over baseline benchmarks, though challenges remain for real-time applications due to computational demands. ELVIS represents a foundational step toward incorporating generative AI into video streaming pipelines, enabling higher quality experiences without increased bandwidth requirements.