Stephen McQuistin presented our poster on
Consolidating Streams to Improve DASH Cache Utilisation at the
ACM CoNEXT conference in Heidelberg, Germany, from 1-4 December 2015.
This is early work, starting to explore how to optimise caching for
large-scale video streaming systems based on the MPEG DASH standard
(and related systems).
The University of St Andrews awarded
Dr Vint Cerf an honorary doctorate on 24 June 2015. To celebrate this,
they organised a one-day event entitled
The Internet at 100, with a number of talks reviewing the history
of the Internet, its current state, and looking forward to the future.
I was honoured to be invited to speak at this event.
I attended the Adaptive Media Transport Workshop held at Cisco in
Issy Les Moulineaux, Paris, on 18-19 May 2015, and organised by
Ali Begen. The goal of the
workshop was to bring together those in industry and academia
working on adaptive video streaming over the Internet, with a
focus on technologies relating to MPEG DASH.
I attended the Workshop on Adaptive Media Transport organised by Cisco in San Jose, CA,
on 14-15 June 2012. For our project,
Martin Ellis and Conor Cahir also attended from Glasgow, along with
Jörg Ott and Varun Singh
from Aalto University.
Welcome to Conor Cahir who starts work as a research student under my
supervision today. Conor's work is sponsored by Cisco, and he'll be
studying adaptive HTTP streaming and cache-aware TCP for streaming.
RTP packet traces for IPTV systems are large, but well structured.
While they compress reasonably well with a general-purpose compression
utility, such as gzip, better
performance can be achieved using a compressor that understands the
structure of RTP data.
I attended the Workshop on Adaptive Video Streaming over IP Networks
held at Cisco Systems in Boxborough, MA, USA, on 12-13 October 2010,
to present an update on our adaptive IPTV work.
In previous work, we have analysed repair and monitoring mechanisms for
scalable media distribution using RTP over multicast UDP/IP. This
project takes one step back to consider the bigger picture of what is
an appropriate protocol to use for large-scale, scalable, IPTV content
distribution.
In our previous
project work we a) established an active measurement infrastructure to
assess the communication characteristics of cross-provider IPTV paths
with different kinds of access networks (cable, ADSL) and carried out a
first series of experiments, b) realising an ns-2 simulation environment
for IPTV systems (including VQEs) incorporating RTCP- based feedback,
FEC, and retransmissions for SSM-based video distribution, and c)
performing initial simulations for feedback-based error repair and
inference using the characteristics determined by the measurement.
We presented
initial measurement results for IPTV networks at the Workshop of
Real-Time Video Distribution over IP Networks held at Cisco Systems in
Lawrenceville, GA, USA on 13-14 November 2008.
Welcome to Martin Ellis, who starts
work as a new research student under my supervision today. Martin is sponsored
by Cisco for his first year, and will be working on the adaptive IPTV project.
Internet Protocol Television (IPTV) systems are a rapidly growing
converged network service. These systems replace the traditional
“set-top box”, receiving broadcast or cable television,
with a networked IP-centric device, to which video is streamed live or
on demand. The user experience initially follows that of traditional
television, but it is expected that additional interactive services
will be offered over time, as the potential of the underlying
converged network architecture is exploited. Key to this, however, is
ensuring the television service provided matches – or exceeds
– that of traditional broadcast television. Converged networks
suffer from different problems than do pure data networks and
dedicated real-time transmission networks, so there is a need for new
algorithms and protocol mechanisms to monitor reception quality and
diagnose network problems. This project aims to develop such new
algorithms and protocols.