Multimedia via Data Networks Agenda n n

Multimedia via Data Networks

Agenda n n n IP services in mobile telephony Voice over IP (High Definition) Video over IP q q q Video on demand Video conferencing Download

Integrated Multiservice Networks— Data/Voice/Video SNA Data Voice Video Internet Multiservice Network Packet-Based

Multimedia via Data Networks

GSM/3 G Mobile Telephony

Talsarunu tarifi (USD/min) Vo. IP un Lattelekom

SIP phones n Basic SIP IP phones below $100 n 802. 11 phones n video phones n Speakerphones n PDAs with SIP software n MAC, Unix, and MSoft.

Voice Quality Guidelines

Silence Suppression by Voice Activity Detection (VAD) Speech Silence Speech No Cells

Fax over IP

H. 323 MCU n n Responsible for managing multipoint conferences (two or more endpoints engaged in a conference) The MCU contains q q 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

A Integrated SIP Service System Desktop SIP clients H. 323 SIPUA sip 323 sipd Programmable SIP servers SIP Gatekeeper SIP-H. 323 signaling gateway Conferencing Hardware SIP phone sipconf SIP-MGCP gateway sipgw MGCP Unified messaging sipum rtspd Streaming media SIP-PSTN gateway PSTN Quick-time Regular telephones RTSP

ENUM example: Voice PSTN Internet 6. 5. 4. 3. 2. 1. 0. 8. 7. 3. 4. e 164. arpa 4. sip: mah@nic. at 43. at 2. +43 780. * 5. INVITE sip: mah@nic. at 43. at Telekom PSTN Switch 1. +43 780 123456 PSTN-IP Gateway nic. at 43. at 6. INVITE sip: mah@nic. at 43. at

ENUM example: SMS delivery PSTN Internet 6. 5. 4. 3. 2. 1. 0. 8. 7. 3. 4. e 164. arpa 4. sip: mah@nic. at 43. at 2. SMS via SMPP MO SMS Center 5. MESSAGE sip: mah@nic. at 43. at at 43 SMPP Server 1. SMS an +43 780 123456 nic. at 43. at 6. MESSAGE sip: mah@nic. at 43. at

cross-domain call ENUM IN NAPTR 7. 3. 5. 7. 3. 2. 2. 4. 2. 6. 0. 1. 8. 7. 8. e 164. arpa. ? . . . NAPTR. . . "!^. *!sip: 19343@fwd. pulver. com!" DNS SRV lookup fwd. pulver. com +878106242237537 sip: 19343@fwd. pulver. com session sip: axelm@nic. at 43. at sip: mah@nic. at 43. at sip: 18341@fwd. pulver. com sip: 19343@fwd. pulver. com

PBX 2 PBX using ENUM +442079025500 PBX PSTN +442079025500 Asterisk Linux PBX ENUM +421257296666 Asterisk Linux PBX PCM or SIP or IAX or H. 323 Internet PCM or SIP or IAX or H. 323 sip: 2666@stuba. sk IN NAPTR 6. 6. 9. 2. 7. 5. 2. 1. 2. 4 e 164. arpa. ? ENUM DNS . . . NAPTR. . . "!\+421257296(. *)$!sip: 2\1@stuba. sk!"

Skype n Based on Kazaa Overlay network q q q n n Unstructured p 2 p file sharing overlay Overlay p 2 p 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: //rfc 3951. x 42. com/)

i. LBC – MOS (Audio Quality) behavior versus percentage packet loss

Skype n n n 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 size 1440 HDV 1080 1280 1920 1080 i HD 720 p HD 704 4 CIF/ Full. D 1 (SD) 720 576 352 320 288 240 CIF (SD) digvid 1080

1. 2 High Quality Digital Video Technologies Resolution Delay Uncompressed HDTV Bandwidth 1080 i (1920 x 1080 30 fps) 1~1. 5 Gbps 100 msec MPEG 2 720 p (1280 x 720 60 fps) 20~80 Mbps 1~2 sec 10 Mbps 2~3 sec 250 Mbps 100 msec 30 Mbps ~300 msec 5~6 Mbps 1~2 sec H. 264 Uncompressed SDTV DV MPEG 2 480 i (720 x 480 30 fps) 4 of 14

Video Streaming Over the Network Bandwidth 10 Gbps 10 Mbps 5 Mbps DVD 1 Gbps HD 100 Mbps SD 50 Mbps WMV MPEG 4 1. 5 Mbps H. 263 128 Kbps MPEG 1 H. 261 QHD 25 Mbps DV MPEG 2

Lab Tests LDK-6000 PDP-502 MX SMPTE 292 M Centaurus 10 Gig. E Ultra. Grid Sender Back-2 -back tests: q q Video: 720 p Duration: 10 min RTT: 70 µs MTU: 8800 bytes 1. 485 Gbps Centaurus 10 Gig. E RTP/UDP/IP SMPTE 292 M Ultra. Grid Receiver Results: q q q No loss or reordering 1198. 03 Mbps throughput Total 10, 178, 098 packets sent and received

HDV over IP system HD Camcorder HD Display … TS Packets MPEG-2 TS IEEE 1394 Interface IP Network … … Sender … Packetizer RTP Packets Packetizer and MPEG 2 Decoder Receiver 7 of 14

i 2 CAT experiences with HD n 2001 Open Opera q q 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 CINESA Diagonal Liceu Opera House HDSDI (1, 5 Gbps ) SDI HDSDI Media Gateway MPEG 2 (10 Mbps ) IP Multicast i 2 CAT UNIVERSITIES (UPC, Ud. G, Ud. L)

Video Packetization and IP Transport n RTP packetization is based on: q n ``RTP Payload Format for Uncompressed Video’’, RFC 4175 Ladan Gharai and Colin Perkins RFC 4175 covers packetization of various video formats: q q Supports range of formats including standard & high definition video Interlaced and progressive RGB, RGBA, BGRA, YUV Various color sub-sampling: 4: 4: 4, 4: 2: 2, 4: 2: 0, 4: 1: 1

RTP n n RFC 1889: RTP: A Transport Protocol for Real-Time Applications RFC 2250: RTP Payload format for MPEG 1/MPEG 2 Video q q q RTP Payload contain integral number of MPEG transport packet (188 byte). Suggest several MPEG picture fragmentation rules. RTP Header fields for MPEG 2 Video 8 of 14