Multimedia System

Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,Multimedia System,Group member Name:,Lim Lee Sa (wet020071) - Introduction,Ling Hung Ping (wet020075)- characteristic,Ooi,Li Ching(wet020141)- features,Tan,Pey,Shy(wet020173)- type of multimedia system,Tan Wee,Seong,(wet020176)- example,Introduction,Multimedia system is a computer (machine) that can transmit and accept information (multiple media) from the external world.,supports the integrated storage, transmission and representation of the discrete media types text, graphics and image and the continuous media types audio and video on a digital computer.,Media types:,Text,Hypertext,Images,Static & Dynamic,Audio,Speech, Music,Video,Movies, Documentaries,2D Graphics,Vector Graphics,3D Graphics,Games,Different form of media types:,01001000,01000101,01001100,01001100,01001111,10101110000101000010101000000011,10101111111110100000010101010001,10000000000011111010101010001011111111111,01111100000010101010001010010000010101010,10111111110100001000101010101010000100010,11110111000000101010111111111111011100000,11111111111111111111000000000000001010100,00000000000000000001000010000111111111000,1111111111111000000000011,1111010000001000100101000,1111111111000000000011110,1100000010000010001000000,1111111101000001111101001,1110100000000001000100000,11000 1110,11101 11001 0001,11000 1110,11001 0001,11100 11000 1110,11101 11001 0001,Data file,Audio file,Video file,Image file,Graphics file,Characteristic,Generation or capture of data,Processing such as digitalize,Storage in devices,Manipulate using software such as,photoshop,Distribution over LAN or WAN network,Output using devices such as monitor,Rendering,representation,transmission,several time-dependent and time-independent media streams,Components,D,evices,Examples,Capture devices,Video camera, audio microphone, keyboard etc.,Software Processing Elements,Content creation, compression, encryption,etc.,Storage devices,CD,-,ROMS, Hard disks, Memories,Distribution network,Ethernet, ATM, Fiber Optics, Wireless,Display / Rendering devices,Monitors, Speakers, Projectors,Printers, CD-quality speaker (HDTV),SVGA,HiRes,monitor,Processing devices,CPUs, Set Top boxes, workstations, DSP hardware,Features,V,ery high processing power,A,file system capable of handling multimedia information,F,ile formats that exploit the inherent properties of the multimedia information,E,fficient and high I/O rate,M,ultimedia operating system,S,torage and memory,N,etwork support,S,oftware tools,Features,V,ery high processing power,- In the modern multimedia context, movement and processing of large amounts of data in real-time are emphasized.,- Include support hardware such as graphics and video adapters, digital signal processors and etc.,A,file system capable of handling multimedia information,- File systems should have the capability to deal with streams of data, such as video and audio.,F,ile formats that exploit the inherent properties of the multimedia information,-,The file formats should be easy to handle from the file system point of view.,E,fficient and high I/O rate,-,The input and output subsystem should be able to handle large storage.,- The controller hardware should be able to provide recording and reading of data from these storages.,Multimedia operating system,- An efficient file system and data structures are required to provide support for direct transfers.,- Disk to NIU, real time scheduling of tasks, fast interrupt processing and streams.,Storage and memory,- Caches have to be larger and may have to be in a 2 or 3 level hierarchy for efficient management.,Network support,- To apply client-server paradigm in building multimedia application, high-speed support from the network subsystem is needed.,- It should be able to stream the data out of the disk directly, to minimize delay.,Software tools,- Need to be user friendly, as they have to handle a variety of media at the same time.,- To make things easier, tools should support object-oriented software design and development methodologies.,Types of Multimedia Systems,Type I,Standalone,Multimedia,system,Example: Authoring system and multimedia presentation system,CPU,CPU,I/O,MEM,NIU,Display, Audio,Controller,Display,Disk,CPU,I/O,MEM,NIU,Display, Audio,Controller,Display,Disk,CPU,I/O,MEM,NIU,Display, Audio,Controller,Display,Disk,DEDICATED LINK,(Physical or Logical),Type II,Peer-to-peer Multimedia system,Example: multimedia workstation-based conferencing system,Type III,Distributed Multimedia system,Exist in a large interconnected networks,Examples: Internet and corporate networks,CPU,I/O,MEM,NIU,Display, Audio,Controller,Display,Disk,CPU,I/O,MEM,NIU,Display, Audio,Controller,Disk,HIGH,SPEED,NETWORK,Examples,Digital satellite: TV program,Data encoded and encrypted,Data transmitted to satellite via uplink in,Isleworth,Data travels a round trip of 44,000 miles before reaching the user,Data unencrypted, decoded in the,Digibox,and viewed on standard TV,When broadcasting audio and video the following has to happen; compression (to MPEG-2); encryption, this is the encoding of television signals or data for security purposes.,E,xample,:,to restrict reception to authorised viewers only or by online communication, to keep them private; and Transmission.,Transmission sees the data sent to the,Astra,1 satellite in space on a geostationary orbit.,The satellite then fires the data back,and,100% availability over a large areas including those more derelict places as long as you can point your minidisk at the,Astra,22.8 degrees east satellite, and do not have a building or other obstruction in the direct line of sight.,Internet-based Game-On-demand,Multimedia Home platform specification (MHP),is a generic interface between digital applications and user machines, whether they happen to be set top boxes, digital TV sets or Multimedia Pcs. MHP extends the DVB open standards. Addressed are MHP architecture, System core, and MHP Profiles.,The Radio Frequency (RF) Input (from satellite dish/aerial) is demodulated into an MPEG-2 stream.,spliced into its video, audio, subtitle, and data streams, and passed on to the CPU and Operating system.,The data stream (usually image files) has its own dedicated rendering engine and is directly passed to the on screen display.,The data streams are examined for system information,teletext,or MHP data object, and then routed via device drivers to the hardware/software modules for interpretation and execution.,Thank You,