I joined Film and Video Production Technology as a Lecturer in 2017. Prior to this, I work at Kingston University on a Knowledge Transfer Partnership (KTP) project which developed a prototype Analogue-Hybrid Multi-Occupant Visitor communication interface for door intercom systems, in collaboration. I was awarded a PhD from the University of Essex in 2015 with my thesis, entitled: “Ultra-High Definition Wireless Video Streaming”, which was concerned with enhanced compression techniques for 4k and 8k UHDTV with particular emphasis on wireless and IP network applications, with part of my research leading to the trials of Internet broadcast of 4k UHDTV in 2014.
Areas of specialism
University roles and responsibilities
- Admissions Tutor, Film and Video Production Technology
- Deputy Chair, Early Career Researchers Forum
Affiliations and memberships
My research interests both video compression and transmission which includes video processing, audiovisual transmission and display. I have been involved in proposing solutions for the beyond high definition transport. This has led me to explore computationally efficient ways of video compression including the use of graphic processing units(GPU). In 2014, I contributed significantly to the implementation of the first 4kUHD broadcast over the Internet and this was presented at the prestigious International Broadcast Convention (IBC) in Amsterdam.
Another impact of his research, was the real-time implementation of carriage of high efficiency video coding (HEVC) content over MPEG2-TS and subsequently http live streaming, which was as a result of research into the transmission of 8K UHD video content over wireless. A part of the software code development for this solution is available online as part of the open source FFMPEG software repository.
My other interests relating to video compression and transmission are:
Quality of experience provision in wireless multimedia networks, error resilient video transmission, image/video quality assessment, frame synchronization and the application of knowledge from video transmission to everyday lives (video door entry systems and Smart homes).
Courses I teach on
Postgraduate research supervision
Research at the Innovative Media Lab (IML) is based on understanding perceptual video quality and developing perceptually-optimised signal processing approaches to improve them.
Please contact me if you are interested in pursuing a PhD at IML
from streaming over an IEEE 802.11ac wireless channel, given
measured levels of packet loss. Findings suggest that there is a
strong content dependency to loss impact upon video quality but
that, for short-range transmission, the quality is acceptable,
making 4kUHD feasible on head-mounted displays.
be sensitive to network impairments. However, available measurement techniques that adopt a full reference model are
impractical in real-time streaming because they require the original video sequence available at the receivers side. The
primary aim of this study is to present a hybrid no-reference prediction model for the perceptual quality of 4kUHD
H.265-coded video in the wireless domain. The contributions of this paper are two-fold: first, an investigation of the
impact of quality of service (QoS) parameters on 4kUHD H.265-coded video transmission in an experimental
environment; second, objective model based on fuzzy logic inference system is developed to predict the visual quality
by mapping QoS parameters to the measured quality of experience. The model is evaluated in contrast to random
neural networks. The results show that good prediction accuracy was obtained from the proposed hybrid prediction
model. This study will help in the development of a reference-free video quality prediction model and QoS control
methods for 4kUHD video streaming.
to communicate with visitors at the door, have evolved over
the years, with the current advancements being a fully internet
protocol (IP) based solution. In order to adopt newer IP based
solutions, current analogue systems can be replaced, yet this may
be costly and cumbersome, especially in a conventional multioccupant
building. We therefore propose an architecture which
supports current analogue door phone systems, and also provides
IP based functionality. We have implemented the proposed
architecture based on SIP, WebRTC and an IoT gateway system
connected to the multi-occupant conventional video door phone
perceptual quality of wireless 4kUHD H.265 video streaming.
Based on Interval Type-2 Fuzzy Logic System (IT2FLS), the
model exploits application and physical layer parameters. The
results show that good prediction accuracy was obtained from
the proposed prediction model. This study should help in the
development of a reference-free video quality prediction model
and QoS control methods for 4kUHD video streaming.
Devices, 2017 IEEE International Conference on Consumer Electronics (ICCE) IEEE
HEVC codecs, a comparison is made between the two codecs?
robustness to packet loss. A counter-intuitive finding arises that the
less efficient codec is less affected by packet loss than the more
efficient codec, even at very low levels of packet loss. The findings
will be of interest to those designing portable devices that can display
up to 4kUHD video.
dimensions, SD, HD, 3D, and 4kUHD, even for portable devices has important
implications for displayed video quality. There is an interplay between
packetization, packet loss visibility, choice of codec, and viewing conditions,
which implies that prior studies at lower resolutions may not be as relevant.
This paper presents two sets of experiments, the one at a Variable BitRate
(VBR) and the other at a Constant BitRate(CBR), which highlight different
aspects of the interpretation. The latter experiments also compare and
contrast encoding with either an H.264 or an High Efficiency Video Coding
(HEVC) codec, with all results recorded as objective Mean Opinion Score
(MOS). The video quality assessments will be of interest to those considering:
the bitrates and expected quality in error-prone environments; or, in
fact, whether to use a reliable transport protocol to prevent all errors, at a
cost in jitter and latency, rather than tolerate low levels of packet errors.