Multimedia via Data Networks

Agenda

IP services in mobile telephony Voice over IP (High Definition) Video over IP

Video on demand Video conferencing Download

Data

Voice

Video

Internet

Multiservice Network

Packet-Based

Integrated Multiservice Networks—Data/Voice/Video

PBX

SNA

Multimedia via Data Networks

GSM/3G Mobile Telephony

Talsarunu tarifi (USD/min) VoIP un Lattelekom

SIP phones Basic SIP IP phones below $100 802.11 phones video phones Speakerphones PDAs with SIP software MAC, Unix, and MSoft.

Voice Quality Guidelines

Silence Suppression by Voice Activity Detection

Speech Silence Speech

No Cells

CellsCells CellsCells

Voice Activity Detection (VAD)

Fax over IP

H.323 MCU

Responsible for managing multipoint conferences (two or more endpoints engaged in a conference)

The MCU contains a Multipoint Controller (MC) that manages the call signaling may optionally have Multipoint Processors (MPs) to handle

media mixing, switching, or other media processing

Multisite Videoconferencing

MCU

Streaming server

rtspd

Quick-time

GatekeeperSIPUA

SIP

H.323

RTSP

sipd

sipconfsipconf

sipumsipum

sip323sip323SIP-H.323

signaling gateway

Conferencing

Programmable SIP servers

Unified messaging

Streaming media

Hardware SIP phone

Desktop SIP clients

sipgwsipgw

PSTN

MGCPSIP-MGCP gateway

SIP-PSTN gateway

Regular telephones

A Integrated SIP Service System

ENUM example: Voice

Telekom PSTN Switch

nic.at43.at

1. +43 780 123456

6.5.4.3.2.1.0.8.7.3.4.e164.arpa

4. sip:mah@nic.at43.at

sip:mah@nic.at43.at

5. INVITE sip:mah@nic.at43.at

PSTN-IP Gateway

2. +43 780.*

DNS

6. INVITE sip:mah@nic.at43.at

PSTN Internet

ENUM example: SMS delivery

MO SMS Center

nic.at43.at

6.5.4.3.2.1.0.8.7.3.4.e164.arpa

4. sip:mah@nic.at43.at

sip:mah@nic.at43.at

5. MESSAGE sip:mah@nic.at43.at

at43 SMPPServer

2. SMS via SMPP

DNS

6. MESSAGE sip:mah@nic.at43.at

PSTN Internet

1. SMS an +43 780 123456

cross-domain call ENUM

sip:axelm@nic.at43.at

nic .at43.at fwd.pulver.com

ENUM DNS

SIP server

SIP server

sip:mah@nic.at43.at sip:18341@fwd.pulver.com sip:19343@fwd.pulver.com

+878106242237537

session

IN NAPTR 7.3.5.7.3.2.2.4.2.6.0.1.8.7.8.e164.arpa. ?

... NAPTR ... "!^.*!sip:19343@fwd.pulver.com!"

DNS SRV lookupfwd.pulver.com

sip:19343@fwd.pulver.com

PSTN

Internet

ENUM

DNS

AsteriskLinux PBX

AsteriskLinux PBX

PBX

PBX2PBX using ENUM

PCM or SIP or IAX or H.323

+421257296666

IN NAPTR 6.6.6.6.9.2.7.5.2.1.2.4e164.arpa. ?

... NAPTR ... "!\\+421257296(.*)$!sip:2\\1@stuba.sk!"

PCM or SIP or IAX or H.323

EN

UM

sip:2666@stuba.sk

+442079025500

+442079025500

Skype

Based on Kazaa Overlay network Unstructured p2p file sharing overlay Overlay p2p network consisting of ordinary and

Super Nodes (SN). Ordinary node connects to network through a

Super Node. Centralized authentication server Excellent Audio quality based on Internet Low

Bit rate Codec ILBC (http://rfc3951.x42.com/)

iLBC – MOS (Audio Quality) behavior versus percentage packet loss

Skype Skype client listens on configured TCP and UDP ports. Uses a variant of STUN to identify the type of NAT and

firewall. Usage of TCP port 80 enables client to reach super node

even through firewalls. Call signaling is done over TCP, messages are preferably

transported over UDP. In the presence of NAT or firewalls, calls between caller

and callee are routed by an intermediate node All Skype messages are encrypted.

HD Video resolution

HD video sizeHD video size1920

1080

1080i HD1080

1440 HDV

720

1280720p HD

704

576

4CIF/FullD1 (SD)

352

288

CIF (SD)

320

240

digvid

1.2 High Quality Digital Video Technologies

Resolution Bandwidth Delay

HDTV

Uncompressed

1080i (1920x1080 30fps)

720p(1280x720 60fps)

1~1.5Gbps 100msec

MPEG2 20~80Mbps 1~2 sec

H.264 10Mbps 2~3 sec

SDTV

Uncompressed

480i(720x480 30fps)

250Mbps 100msec

DV 30Mbps ~300msec

MPEG2 5~6Mbps 1~2 sec

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Video Streaming Over the Network

WMV1.5Mbps 25Mbps

5Mbps

50Mbps

100Mbps

1Gbps

10Gbps

HD

DVMPEG4

MPEG1

DVD

H.261

128Kbps

MPEG2

SD

QHD

Bandwidth

10Mbps

H.263

Lab Tests

Centaurus

10 GigE

Centaurus

10 GigE

UltraGrid Sender

UltraGrid Receiver

LDK-6000PDP-

502MX

1.485 Gbps

RTP/UDP/IP

SMPTE 292M SMPTE 292M

Back-2-back tests: Video: 720p Duration: 10 min RTT: 70 µs MTU: 8800 bytes

Results: No loss or reordering 1198.03 Mbps throughput Total 10,178,098 packets

sent and received

HDV over IP system

MPEG-2 TS

IP Network

PacketizerPacketizer and MPEG2 Decoder

Sender Receiver

TS Packets …

…RTP Packets

HD Camcorder

IEEE1394Interface

HD Display

…

…

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i2CAT experiences with HD

2001 Open Opera Live transmission of an Opera (La Traviata) from Liceu Opera House to a cinema both

in Barcelona to compare spectators feelings. After several tests with experts, we concluded that the only acceptable quality was

uncompressed high definition

i2CATMedia

Gateway

HDSDI

SD

I MPEG2(10 Mbps )

CINESA Diagonal

UNIVERSITIES (UPC, UdG, UdL)IP Multicast

HDSDI (1,5 Gbps )

Liceu Opera House

Video Packetization and IP Transport

RTP packetization is based on: ``RTP Payload Format for Uncompressed Video’’, RFC 4175 Ladan Gharai and Colin Perkins

RFC 4175 covers packetization of various video formats: Supports range of formats including standard & high definition video Interlaced and progressive RGB, RGBA, BGR, BGRA, YUV Various color sub-sampling: 4:4:4, 4:2:2, 4:2:0, 4:1:1

RTP

RFC 1889: RTP: A Transport Protocol for Real-Time Applications

RFC 2250: RTP Payload format for MPEG1/MPEG2 Video RTP Payload contain integral number of MPEG

transport packet (188byte). Suggest several MPEG picture fragmentation rules. RTP Header fields for MPEG2 Video

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