Video Transmission Techniques in Wireless Networks
Summary
Wireless video delivery has evolved from purely digital schemes to hybrid and analog-inspired approaches that address the inherent variability of radio channels. Traditional digital methods rely on source compression and error-correcting codes to deliver bit-accurate streams, yet they suffer from abrupt quality collapse when channel conditions deteriorate. To overcome this “cliff effect,” recent research has introduced pseudo-analog or hybrid digital-analog frameworks that blend compression with analog modulation. Such techniques exploit linear transforms and progressive coding to ensure that video quality degrades gracefully as signal-to-noise ratio falls, rather than collapsing suddenly. Extensions of these concepts encompass multi-view and volumetric media, where correlations across views or dimensions are harnessed via multi-dimensional cosine transforms or graph-based signal processing. Concurrently, adaptive resource-allocation algorithms have been developed to distribute power and bandwidth between digital and analog components, texture and depth layers or across spatial streams in multiple-input multiple-output (MIMO) systems. Collectively, these advances bring more predictable quality scaling, reduced latency and simpler rate control, with applications spanning mobile streaming, immersive virtual reality and Internet-of-Things video surveillance.
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Video Transmission Techniques in Wireless Networks publication trend
The graph below shows the total number of articles in video transmission techniques in wireless networks across all publications each year (not limited to Nature Index journals).
Technical terms
Cliff effect: A phenomenon in digital wireless video where perceived quality drops sharply once channel capacity falls below a threshold.
Soft Delivery: A pseudo-analog streaming paradigm that replaces hard bit-rates with linear transforms and analog modulation to provide smooth quality adjustment.
Hybrid digital-analog transmission: A method combining compressed digital bitstreams with analog signal components to mitigate abrupt video degradation under variable channel conditions.
Graph Fourier transform: A generalisation of the Fourier transform applied to data defined on graph structures, used to exploit spatial correlations in point-cloud and multi-view video transmission.
References
- Soft Delivery: Survey on a New Paradigm for Wireless and Mobile Multimedia Streaming. ACM Computing Surveys (2023).
- HoloCast+: Hybrid Digital-Analog Transmission for Graceful Point Cloud Delivery With Graph Fourier Transform. IEEE Transactions on Multimedia (2021).
- Resource Optimization for 3D Video SoftCast with Joint Texture/Depth Power Allocation. Applied Sciences (2022).
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