Multimedia Hardware Platforms. MOD002556. 31/03/2014. Week 9

Multimedia Hardware Platforms
MOD002556
31/03/2014
13:00-16:00

IPTV, VOD, Multicasting and MPEG infastructure

Enabling technology
HTTP

http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol

SMTP

http://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol

IRC

http://en.wikipedia.org/wiki/Internet_Relay_Chat

RTSP

http://en.wikipedia.org/wiki/Real_Time_Streaming_Protocol

MPEG
http://en.wikipedia.org/wiki/Moving_Picture_Experts_Group
http://www.mpeg.org/

MPEG2
http://en.wikipedia.org/wiki/MPEG-2

MPEG4
http://en.wikipedia.org/wiki/MPEG-4

MPEG7
http://en.wikipedia.org/wiki/MPEG-7

MPEG21
http://en.wikipedia.org/wiki/MPEG-21

Steaming Media
http://en.wikipedia.org/wiki/Streaming_media

JPEG
http://en.wikipedia.org/wiki/JPEG
http://www.jpeg.org/

Advanced graphics port
http://en.wikipedia.org/wiki/Accelerated_Graphics_Port

•Originally 66MHz x 32 bits

–264 MBps

•Most recent version is x8

–2 GBps

  (Only 264 MBps for capture)

•Current systems use

  16x PCI-Express (PCI-e)

–3.7 GBps

  (display and capture)

Video Capture

http://en.wikipedia.org/wiki/Video_capture

•Analogue-to-Digital Conversion (A-to-D)

•Analogue format

–YUV

•Y is black & white luminance

•U is blue - Y

•V is red - Y

–Used for small storage and bandwidth requirement

•Digital format

–RGB

–640 x 480 pixels VGA at 30 fps requires 27 MBps

DVD formats

http://en.wikipedia.org/wiki/DVD_formats
http://dvr.about.com/od/dvdrecordableformats/f/faq5.htm

•DVD 5

–Single sided, single layer with capacity of up to 4.7 GB

•DVD 9

–Single sided, dual-layered with total capacity of 8.5 GB

•DVD 10

–Double-sided, single layer with a capacity of 9.4 GB

•DVD 18

–A double-sided, dual-layer with total capacity of 17 GB

Compression Techniques

http://en.wikipedia.org/wiki/Image_compression

•Redundancy

–Remove multiple “o” or “1”s

•Quantisation

–Subtract 128

•Discrete Cosine Transformation

–Equate to a cosine curve

•Encoding “words” (Hofman)

–Match to a “code word”

Understanding Encoding

http://en.wikipedia.org/wiki/Encoding_(memory)

http://www.iptvdictionary.com/IPTVDictionary-Intra-Frame-I-Frame-Definition.html

http://x443.wordpress.com/2008/12/25/visualizing-mpeg4-motion-compensation-vectors-using-mplayer/

WEBP Compression

https://developers.google.com/speed/webp/docs/compression

https://developers.google.com/speed/webp/docs/compression?hl=de

IP Multicasting

http://en.wikipedia.org/wiki/IP_multicast

•IP

–“Best Efforts” (no guarantee QoS)

–“peer to peer” 1, 2 or more channels

•IP Multicasting

–IP packets sent to

  Rendezvous Point (RP)

–Packets multicasted to

  individual peers from RP

http://www.ietf.org/

http://my.opera.com/blu3c4t/blog/2008/02/12/internet-protocol-over-satellite-network

•Envivio MPEG4 suite in MEL114

•http://en.wikipedia.org/wiki/Video_codec

•http://en.wikipedia.org/wiki/Iptv

•http://en.wikipedia.org/wiki/Video_on_demand

•http://en.wikipedia.org/wiki/H264

•http://www.ist-nm2.org/publications/nm2_Brochure_2nd_edition.pdf

•http://www.ist-nm2.org/production_tools.html