Guillaume Bichot - Principal Scientist Rennes

Guillaume Bichot

Principal Scientist


Laboratory:Home Experience Lab

What's new:

May 2012 - Digital Life
I am leading a new project in Technicolor named "Digital Life". The goal is to simplify the user's digital life in personalizing the way he accesses, manages and consumes her/his digital content. We embrace audio/video but also any information flows/sources that can influence user digital's life. It is a multi disciplinary project that gathers teams working on topics related to user environment, user perception knowledge, personalized media distribution, privacy, personalized rendering, new user interactive content, multi-screen operations, new media formats and new user centric service architecture.

December 2011 - online machine learning course by  Andrew Ng (Standford)
I completed this 2 intensive months course, I recommend to everybody. In addition to the very pedagogic course , you get homework that give you a good background for approaching various research areas where ML could be a very convenient swiss knife you always dreamed off. We currently experiment ML algorithms in video stream characterization and detection and in QOE prediction.

Short Bio:

Guillaume Bichot, born in 1965, holds a master of Network & Computer Science of the University of Paris VI ("Pierre et Marie Curie").
In 1990, he joined SILICOM, a software engineering company in Rennes. He has been involved in various projects as a software and/or micro-electronic consultant with Thomson Electronic Laboratory (D2HDMAC multiplex system - control and supervision work station), France Telecom Transpac (X25 Access Network administration and supervision), Thomson Broadcast System (MPEG2 compression board for US-DSS and European-DVB markets, VOD professional backendsystem).
In 1996 he joined Thomson Multimedia, corporate research to work on home networking participating into the developments around the High Performance Serial Bus IEEE 1394. In 1997-2000, he contributed significantly to the specification of the Home Audio Video interoperability (HAVi), a distributed software platform for Consumer Electronic appliances, as one of the main architect.
In 2001, he participated to the new Thomson multimedia Research laboratory set-up in Princeton, New Jersey, USA, as a senior member in order to work on video streaming over wireless mobile networks. He’s been involved in ETSI, 3GPP-UMTS and WLAN (IEEE 802.11) inter-working activities.
End of 2003, back to France he joined the Network laboratory as a technical advisor for network science focusing on broadband wireless access networking.  He participated onto a project related to the IEEE802.16 standard and led activities related to Medium Access Control and IP transport.
In 2005, he set-up the Mobile IP TV activity for Thomson Corporate Research, France and led activities around video on demand over DVB-H and ATSC M/H.
Since end of 2008, he led worldwide research projects in Technicolor. Current project is about digital life enhancement; it gathers 50 people around the world (Beijing, Hanover, Paris, Palo-alto, Rennes).

Research interests:

My interest is about media (audio/video) delivery. In particular I focus on multi-path, multi-link delivery wherein path diversity is operated intelligently to 1/ smooth and increase the user experience, 2/ operate in a more efficient way the delivery paths. Activities range from delivery architecture through synchronization mechanisms, transport formats (SVC, MBR) optimization, video QOE modeling and protocols optimization. Recent question I am addressing is whether video streaming would benefit from CCN content centric network.


2009-2012 - Connected Home
This project was about enhencing the user experience regarding media delivery to the home. It was one of the 6 research projects in technicolor reserach & innovation worlwide. We addressed various topics ranging from scalable distribution (P2P, SVC), broadcast/broadband combined networking, adaptive streaming, home network monitoring and management, in home wirless distribution and distributed storage. In addition to the project lead, I have been particularly involved in adaptive streaming and combined networking. I have contributed in the following collaborative projects CELTIC/Motswan, French/FUI Systerminal, FP7 FIGARO.
2005-2008 - Mobile Video
In 2005, I set-up a team in Rennes to work  around the mobile TV. I participated in several architecture meetings in order to strategically address this new market for Thomson. As the DVB-H expert, I helped different business units to quickly setup environment test including Grass Valley in France and mobility team in USA. End of 2007, we were almost 10 people working on advanced studies and developments around mobile TV. Our “Robust filecasting” work has been shown two times in IBC 2006 and 2007 and partially integrated in a product. I wrote papers and filled several patents. In the mean time we have been active in standardization activities (DVB-IPDC, OMA-BCAST and 3GPP, ATSC-MH). Between 2007 and 2008, we have been involved in the French/FUI Mobimages project. This project took place in Brittany and aimed at developing a complete and advanced mobile TV chain from the content provider up to the terminal. I was the  work package leader coordinating the developments of the platform as well as of the development of the experimental cellular phone terminal.
2004-2005 Professional wireless media distribution
This project was about developping a platform from scratch based on the IEEE802.16 technology. The envisgaed outcome was a professionnal video communication kit. We designed and developped a transmitter board wherein I took in charge the CPU block (based on a PowerPC and a PCI interface), ported Uboot and Linux on it and developed the IEEE802.16 driver. In the same time we contributed to the  FP6 IST BROADWAN project. The Thomson contribution was relative to fixed wireless broadband access in rural areas. In this context, we worked on Wimax use cases. I co-authored a paper: “Hybrid architecture to achieve true broadband access in rural areas”.I have started works on multi access technologies with the following presentation and papers: “A multilink architecture for a global wireless Internet connectivity” (ASPROM seminar - May 10, 2005) and “New architectures for an enhanced multimedia wireless broadband service” (Broadband Europe symposium 2005 - December 12, 2005).
2001-2003 Cellular networking for media distribution
In this project, we decided to investigate the cellular technology. We spent a year and half understanding the cellular ecosystem and its standardization (3GPP, 3GPP2). I did focus particularly onto the MAC layer and Between 2002-2003,  on WLAN/3G inter-working. The idea regarding that project was to inter-connect the WLAN access network as IEEE802.11x with some public network as a 3G mobile network (e.g. 3GPP/UMTS) or an IP network. I have been involved within the ETSI/BRAN/Hiperlan2-3G inter-working group and the 3GPP SA2/WLAN group trying to define an architecture framework and the interfaces to allow the inter-connection between Hiperlan2 and both IP and UMTS/3GPP networks.
1996-2000 Home networking
This project focused on the IEEE 1394 (FireWire). Beyond the development of the bus technology, we wanted to develop an interoperable  framework. Between 1997 and 2000, the work was fully driven by the HAVi (Home Audio Video Interoperability) effort. It is a distributed software architecture designed over the IEEE80.1394 (Firewire) Bus. This was an International project in the framework of a consortium composed by eight consumer electronic companies: Thomson, Philips, Matsushita, Sony, Hitachi, Toshiba, Sharp, and Grunding.I was the Thomson representative and main contributor of the messaging system and the registry.
In addition to participating in HAVi afffot, we were involved in the  Eureka COMMEND project. I participated mainly as the Thomson HAVi expert. As a task leader I had to extend the HAVi 1.0 specification to allow multiple clustering within the HAVi network. I've also participated within studies about inter-connection between the wireless LAN ETSI/Hiperlan2 and the bus IEEE1394 (Firewire).


More than 20 patents in the field of network science and mobile networking.

Some experiences:

Multi-path and multi-link video distribution
Content Centric Network and video streaming (simulation)
Distributed multi sources adaptive streaming (algorithms and experimentation)
To optimize concurrent SCTP (model and experiment)
Proxy based architecture (architecture study)
WLAN/cellular tight coupling (architecture, protocols, algorithms)

Wireless video
Research on optimizing [video] file distribution over cellular networks (measurement campaign, prototyping in C++)
Research on optimizing video over Wifi (algorithms, experiments, Linux)

Software distributed platform
Developed HAVi software distributed platform (architecture, prototyping in C and Java).

Remote management
Developments of software plugins for a X25/IP centralized monitoring system(UNIX, C)

Embedded system
WMAN professionnal system (Uboot + Linux port on IBM PPC based custom board, Designed CPU part of our IEEE802.16 based custom board)
Video to smartphones (Linux port on Compaq IPaq)
VOD system (Design and test of a FPGA based SCSI disks board, Wrote low level file system for multi SCSI-RAID in C, OS9 port on Mototola 68360 MC based custom board)
Video compression boards for MPEG2 and DSS systems ( Wrote control software including statistical multiplexing algorithm in C).


Drama school
Founder and president of "La Chapelle Enjouée", a drama school and a troupe since 2005 (2 employees, 27 children, 8 adults, 1 stage set decorator).
Want to know more, go here:
Founder and secretary of "La Chapelle bien chaussée" since 2004, a running club.
Virtual pilot
Virtual pilot (252 hours with since 2006. Operate FS2004.
A fan of Orbiter (space flight simulation:
Guitarist (modern).
Chorus singer (tenor)
From 1993 to 1997 in Chevaigné (Britany)
From 2001 to 2003 in Princeton (Wetminster choir college community)
A beginner in painting (oil)
Family and leisure
Between 1998 and 2000, member and president of AFEL, a multi activities organization for families in La Chapelle Chaussée-France (several employees, more than 100 members)
Between 1993 and 1997, member and vice-president of ASCC, a multi activities organization for families in Chevaigné-France (11 sections, several employees, more than 100 members)

Latest publications


Experimentation of Multipath HTTP Streaming over Internet

Stéphane Gouache, Guillaume Bichot, Christopher Howson

NEM Summit / Best Paper award
September 27, 2011

Distributed & Adaptive HTTP Streaming

Stéphane Gouache, Guillaume Bichot, Amine Bsila &amp, Christopher Howson

ICME 2011 / best paper candidate
July 11, 2011

Smart single window congestion control for concurrent multipath transport

Amine Bsila, Guillaume Bichot, Stéphane Gouache, Christopher Howson, Nicolas Montavont

ICCCN 2010
August 02, 2010

Introducing innovative services with a dense broadcast network

Samuel Guillouard, Guillaume Bichot, Christopher Howson, Yvon Legallais

June 17, 2009

Packet Loss in a DVB-H Network Christopher Howson

ICT Mobile Summit
June 11, 2008

Robust file casting for Mobile TV

International Broadcasting Convention (IBC)
September 01, 2007


EEE International Symposium on Broadband Multimedia Systems and Broadcasting IEEE BTS
March 01, 2006

New architectures for an enhanced multimedia wireless broadband service

Guillaume Bichot, Wolfgang Brauneis, Hilmar Linder

Broadband Europe
December 01, 2005

Home network leaps to digital

Guillaume Bichot, Louis Litwin, Kumar Ramaswamy

RF Design
September 01, 2002


Broadcast/broadband tight coupling for a new personalized TV experience (presentation)

Guillaume Bichot, Yvon Legallais

EBU Broadthinking 2011
March 30, 2011


A multiLink architecture for a global wireless Internet connectivity

Wibrace Workshop
June 01, 2005

Hybrid architecture to achieve true broadband access in rural areas

I. Tardy, L.E. Bråten, Guillaume Bichot, M. Settembre, J. Seseña

Broadband Europe
December 01, 2004