Codec Technologies - World Broadcasting Unions

WBU-ISOG Forum 2014
in Tokyo
Codec Technologies
g
Standards and Development Update
( Session 2.4 HEVC and DVB S2E )
NTT Electronics Corporation
April 30th, 2014
P. 2
Challenging Issues of Broadcasters and Operators
Issue
Needs
S
Solution
1. Tighter Satellite
Bandwidth
Reservation
-
More economical
transmission by advanced
encode and modulation
Apply Efficient Method：
- H.264/AVC or HEVC
compression
- DVB-S2X modulation
- SCPC to MCPC
2 Increase Revenue
2.
but Reduce OPEX
-
Transmission of
heterogeneous type of contents
together. (Linear Video, File,
Data, etc)
Apply multimedia friendly
transport
- MMT
-
Heterogeneous
H
t
ffeed
d
bonding
(e.g. Satellite + Fiber)
-
More robust FEC than
ProMPEG is required
because high bitrate
contents
co
te ts suc
such as HD a
and
d
UHDTV transmission is
increasing
3. Requirement for
error-free
transmission
over
o
e IP
Apply robust FEC
- LDGM
P. 3
1. Efficient Compression : HEVC

Targeted efficiency is double of MPEG-4/AVC.

St d di d as the
Standardized
th partt off MPEG-H
MPEG H (ISO/IEC 23008)
23008).

FDIS (Final Draft of International Standard ) in Jan. 2013.
 4:2:0 support

FRExt (4:2:2, 4:4:4 support) will be standardized in July 2014.


cf. MPEG-2 standardization done in 1995
AVC/H.264 done in 2003, FRExt done in 2007.
Various applications
pp
for Video distribution.

Broadcast (UHDTV, HD, SD, Smaller)
 Internet Video, Packaged Media, etc.

For UHDTV distribution, HEVC is key technology.
1. Efficient Compression : HEVC
4
Japan’s UHDTV Roadmap and NexTV-F Project
Source: NexTV-F
Japan’s Roadmap
4K/8K Ultra High Definition Television
2020
Prepare th
P
the 4K/8K
Broadcasting environment
to the viewer
who wish to watch
Now On Time
2016
8K Test Broadcasting : Prepare the
environment to the interested viewer
2014
2013
4K Test Broadcasting :
Prepare the environment to
the interested viewer
Utilize the Test
Result
4K/8K testbed study project
In FY2013
Technical
Feasibility
Contents
Initiatives
Tech./Operational
Recommendations
Public
Relations
NexTv F (Next TV Forum)
NexTv-F
Broadcast Platform
Operator (Pay TV)
Broadcasting
Operators
All-Japan
Telecommunication
Operators
Broadcast
Equipment
Manufactures
Consumer
Electronics
Manufactures
Merchandising Firm
/ Ad. Agencies
P. 5
NTT Electronics Roadmap

AVC/H.264 Based 4K contribution codecs: Ready

HEVC
 Under preparation.
 Targeted to 4K/HD, also expandable to 8K
 4:2:0 and 4:2:2
 HEVC
4K/HD system : FY2015
6
2. Multimedia-friendly Transport

In multimedia era, MPEG-2 system (part.10) is not fit
to the broadcaster’s requirement.
 Broadcaster/Operator
B
d
/O
wants to transmit
i not only
l
linear video but 3D audio, file, data and control
signal.
g

Need to break the curse from “PCR”
 Advanced synchronization system for Transport
stream is needed.

Solution
 Using MPEG-H MMT: MPEG Media Transport
 Standardized as ISO/IEC 23008-1
23008 1
 Efficiency / Usability Improvement
2. Multimedia-friendly Transport
About MPEG-H Standard



International Standardized as ISO/IEC 23008.
Includes MMT, HEVC and FEC codes.
NTT R&D involved to the Standardization.
ISO/IEC 23008-1 MPEG Media Transport (MMT)
ISO/IEC 23008-2 High Efficiency Video Coding (HEVC)
ISO/IEC 23008-3 3D Audio
MPEG-H
ISO/IEC 23008
ISO/IEC 23008-10 Media Transport FEC Codes
7
2. Multimedia-friendly Transport
MMT (MPEG Media Transport) in MPEG-H



Standardized as ISO/IEC 23008-1
Next generation media transport standard which replaces current
MPEG-2 TS (ISO/IEC 13818-1) . MPEG-2 TS has been used for
MPEG-2 video and MPEG-4/AVC video transport.
Capable of hybrid transmission for video, audio and other media
data using satellite and IP network
MMT
1. Flexible Multiplexing
Capable of combining video, audio and any kinds of data
ISO/IEC 23008-1
2. Variable-length Packet
Efficient for IP streaming
MPEG-H
HEVC
ISO/IEC 23008
ISO/IEC 23008-2
23008 2
3. High-efficiency FEC
Recover high error rate at application level
4. UTC Time Stamp
Synchronization between multiple points
FEC
Codes
ISO/IEC 23008-10
5. Control of Visualized Layout
Capable of layout and timing control on screen
8
2. Multimedia-friendly Transport
9
Benefit of Applying MMT (1)

Hybrid transmission among different circuit.
e.g. Satellite and Fiber combination for load mitigation
UTC
UTC
MMT
supported
Encoder
MMT
supported
Decoder
Satellite
Load mitigation
Fiber

Adaptive transmission among different circuit.
Satellite Feed
Fiber Feed
NG
2. Multimedia-friendly transport
10
Benefit of applying MMT (2)

Using
U
i UTC (C
(Coordinated
di t d Universal
U i
l Time)
Ti ) based
b
d time
ti
stamp enables complete synchronization of the
component among different feed.
UTC
MMT
supported
Video
Encoder
UTC
Satellite Feed
MMT
supported
Decoder
MMT
supported
pp
Audio
Encoder
Fiber Feed
UTC
A/V Synchronization
P. 11
3. Robust IP Transmission
3. Robust IP Transmission
12
FEC Codes in MPEG-H


At IP based transmission, FEC is very important.
Pro-MPEG is commonly used, but not robust.
LDGM code will be added to ISO/IEC 23008-10
23008 10 in Oct. 2014. (FDIS)
 NTT R&D has been involved to the standardization WG.
MMT
ISO/IEC 23008-1
MPEG-H
ISO/IEC 23008
HEVC
#1: RS Codes
#2: S-LDPC code
#3: RaptorQ
ISO/IEC 23008-2
#4: RaptorQ LA
#5: LDGM code
FEC
Codes
ISO/IEC 23008-10
#6:Pro-MPEG
3. Robust IP Transmission
13
LDGM Codes and Pro-MPEG Comparison

LDGM covers wide
id range off IP Bitrates
Bit t
Bitrate
1Mbps
10M
100M
1G
Radio
SDTV
Compressed
Contents
HDTV
4K
8K
Applicable
FEC Codes

Pro-MPEG
LDGM
LDGM is
i very robust
b t in
i the
th meantime
ti
keeping
k
i
low
l
complexity
l it
LDGM codes
Large block length
1D Pro-MPEG
・・・
・・・
・・・
Recover thousands of
lost packets in a block
1 packet loss
Short block length
・・・
2 packet loss
Recover only one
lost packet in a block
3. Robust IP Transmission
14
Robustness Comparison
LDGM code is robuster than ProMPEG and LDPC
against the case of Random packet erasure.
10
10
Packete
eerror rate
Packet
error
rate

10
10
−1
1
Without FEC
Uncoded
−2
ProMPEG 1D
1D
ProMPEG
−3
ProMPEG 2D
ProMPEG
2D
MMT
MMTLDGM
LDGM
−4
LDPC rfc5170
LDPC
rfc5170
10
−5
Robuster
RaptorQ
RaptorQ
RScode
code
RS
10
(The simulation condition is
same for each code, K=81 &
M=18.)
−6
0
0.02
0.04
0.06
0.08
Random packet
Random
packeterasure
erasurerate
rate
Coding performance test
in the case of LS33
0.1
NTT Network Innovation Labs.
3. Robust IP Transmission
15
Benefit of Applying MMT LDGM Code


Applicable from Low bitrate to High bitrate.
 Rate-adaptive
 Layer-Aware FEC for Scalability
Efficient Transmission
 Support very large block length up to 32
000
32,000.
 Applicable to UDP transmission for multicast.
IInternational
t
ti
l
IP Transmission
pp
g by
y international IP
MMT LDGM was applied
to of 8K p
public viewing
transmission of 2012 summer sports event.
(Transmission Technology courtesy by NTT Network Innovation Labs.)
P. 16
Summary

HEVC is the key technology for efficient transmission over the
limited bandwidth circuit.

MPEG-2 system (part 10) no longer fits to the current
broadcaster’s requirement. Applying MPEG-H MMT realizes
advanced
d
d service
i and
d operation.
i

IP transmission gradually replacing existing ASI based
transmission. Pro-MPEG has been used for FEC but not so
robust.
LDGM will replace Pro-MPEG and will gain more robustness.

NTT Electronics is developing these advanced technologies for
the next HEVC codecs.
17
Thank you for your attention

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