Research Lines

From the network layer to the viewer’s perception.

Adaptive Video Streaming

MPEG-DASH bitrate adaptation algorithms such as Look Ahead, variable-bitrate encoding and server-side representation switching.

MPEG-DASH ABR algorithms VBR +1 more

Low-Latency Live Streaming

Live delivery with LL-DASH and SRT, chunked transfer and delay-aware switching to keep latency low without stalls.

LL-DASH SRT Live video

Quality of Experience

Objective QoE models validated with subjective tests, ITU-T P.1203, 3D video and QoE-as-a-Service for 5G vehicular scenarios.

QoE ITU-T P.1203 VMAF +1 more

Peer-Assisted Delivery

Hybrid P2P distribution for DASH with WebRTC and Service Workers (SwarmLayer), transparent to existing players.

P2P WebRTC CDN offloading

Reliable Content Delivery

File delivery over unidirectional and multicast channels with FLUTE and AL-FEC (LDPC), background push and hybrid broadcast/broadband networks.

FLUTE AL-FEC DVB +1 more

Wireless and Green Networking

QoS-aware routing and video in mobile ad hoc networks, energy-efficient protocols and Energy Efficient Ethernet for streaming servers.

MANET QoS routing Energy efficiency
Featured Publications
Performance evaluation of peer-assisted MPEG-DASH streaming in multi-user mobile scenarios featured image

Performance evaluation of peer-assisted MPEG-DASH streaming in multi-user mobile scenarios

Performance evaluation of peer-assisted MPEG-DASH streaming with multiple concurrent users in mobile scenarios.

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Román Belda
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SwarmLayer: A Hybrid P2P Assisted Solution for MPEG-DASH Streaming featured image

SwarmLayer: A Hybrid P2P Assisted Solution for MPEG-DASH Streaming

SwarmLayer is a hybrid P2P layer for MPEG-DASH that uses WebRTC and Service Workers to offload up to 96% of server traffic with no changes to existing players.

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Román Belda
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A DASH server-side delay-based representation switching solution to improve the quality of experience for low-latency live video streaming featured image

A DASH server-side delay-based representation switching solution to improve the quality of experience for low-latency live video streaming

SSRS for LL-DASH live streaming uses server-measured client request delays to adapt video quality, achieving good quality-latency trade-offs without player modifications.

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Román Belda
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Look ahead to improve QoE in DASH streaming featured image

Look ahead to improve QoE in DASH streaming

The Look Ahead ABR algorithm for DASH streaming leverages variable bitrate information from constant-quality encodings to minimize stalls while maintaining high QoE, outperforming …

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Román Belda
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New objective QoE models for evaluating ABR algorithms in DASH featured image

New objective QoE models for evaluating ABR algorithms in DASH

Three new objective QoE models for DASH based on PSNR and VMAF, validated subjectively and via the Look Ahead ABR algorithm, outperforming existing models.

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Ismael de Fez
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Recent Publications

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Multimedia Communications Group (COMM)

Institute of Telecommunications and Multimedia Applications (iTEAM)

Building 8G, Access D, Floor 4 – Universitat Politècnica de València

Camino de Vera, s/n

46022 Valencia, Spain

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