IEC TR 63094:2017

IEC TR 63094 ®
Edition 1.0 2017-06
TECHNICAL
REPORT
colour
inside
Multimedia systems and equipment – Multimedia signal transmission –
Dependable line code with error correction

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IEC TR 63094 ®
Edition 1.0 2017-06
TECHNICAL
REPORT
colour
inside
Multimedia systems and equipment – Multimedia signal transmission –

Dependable line code with error correction

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.160.60; 35.110 ISBN 978-2-8322-4337-4

– 2 – IEC TR 63094:2017 © IEC 2017
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 9
4 4b/10b line code . 9
4.1 Overview. 9
4.2 Forward error correction (FEC) . 9
4.3 Embedded clock . 9
4.4 DC balance . 9
4.5 4b/10b data encoding. 10
4.6 Frame format . 10
4.6.1 Frame . 10
4.6.2 Setup command . 10
4.6.3 Idle command . 11
4.7 Encoding. 11
4.8 Decoding . 11
4.9 Error handling . 11
4.9.1 1-bit error . 11
4.9.2 2-bit error . 12
4.9.3 Over 3-bit error . 12
Annex A (informative) Real-time scheduling . 13
Annex B (informative) Characteristics of embedded clock . 14
Annex C (informative) Characteristics of DC balance . 15
Annex D (informative) Implementation of a decoder . 16
Bibliography . 17

Figure 1 – A humanoid robot . 6
Figure A.1 – EDF scheduling . 13

Table 1 – The 4b/10b data transform . 10
Table 2 – Setup command . 10
Table 3 – Idle command . 11
Table 4 – The 4b/10b look-up . 11
Table B.1 – The length of successive 0 or 1 in case of 1-bit error . 14
Table C.1 – An example of the isomery of 0 and 1 in a successive 10-bit window . 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MULTIMEDIA SYSTEMS AND EQUIPMENT –
MULTIMEDIA SIGNAL TRANSMISSION –
DEPENDABLE LINE CODE WITH ERROR CORRECTION

FOREWORD
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The main task of IEC technical committees is to prepare International Standards. However, a
technical committee may propose the publication of a technical report when it has collected
data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
IEC TR 63094, which is a technical report, has been prepared by IEC technical committee 100:
Audio, video and multimedia systems and equipment.
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
100/2823A/DTR 100/2871/RVDTR
Full information on the voting for the approval of this technical report can be found in the
report on voting indicated in the above table.

– 4 – IEC TR 63094:2017 © IEC 2017
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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INTRODUCTION
This document defines a line code that incorporates error correction capability to
communicate reliably among multimedia components, I/O peripherals and computers. A
number of complex multimedia machines, in particular robots, automobiles, and network
routers, have a growing demand for distributed processing. In addition, modernization of
facilities such as factories, offices, schools, and homes is creating a ubiquitous and
multimedia computing environment. Unlike conventional PC applications for documentation
and Internet applications that exchange texts without hard time constraints, these types of
cooperative computing require reliable real-time responses to physical events occurring in the
real world. In order for distributed nodes to cooperate in real-time, an interconnecting network
shall realize real-time and dependable communication without re-sending on noisy
environments. The 4b/10b provides a dependable line code for such real-time
communications between multimedia components, I/O peripherals and/or computers by
providing embedded clock, DC balance, error detection and error correction features.
The real-time aspect means that the exactness of the system including operations and
communications depends not only on the result, but also on the time it took to achieve the
result. In the narrow sense, the real-time aspect means that the time constraint, including
deadlines or cycles, must be met.
Real-time tasks with the time constraints are generally scheduled and executed by a real-time
scheduler and a real-time oper
...