Audio and Video Streaming

1
Audio and Video Streaming

Presented by Thanh Ly Liqin
Zhang Ronald Togelang Hector
Frausto
2
AGENDA

• Introduction
• - D\Introduction.avi
• Audio Streaming Overview
• Video Streaming Overview
• Audio Streaming Demonstration
• Video Streaming Demonstration
• Questions and Answers

3
AUDIO STREAMING OVERVIEW

• Audio File Features
• Audio Streaming Concept
• Audio Streaming Advantages
• Audio Streaming Applications
• Audio Streaming Format
• Audio Streaming Products

4
Audio File Features

• Audio file is a record of captured sound that can
  be played back
• e.g. .WAV File
• Audio files are compressed for storage or faster
  transmission
• Requires high bandwidth to transfer across the
  network

5
Audio Streaming Concept
LAN, Intranet, Internet
?PC Audio Format
?PC Windows Media
.ASF Real Producer .RM
.WAV Live Broadcast
Streaming Software
Windows Media Encoder Real Producer 7.0
6
Audio Streaming Concept

• Analog-to-Digital modulation
• Streaming audio technologies relies on
• Sound sequences
• Compression schemes
• Compression schemes (encoding) decreases the
  audios bandwidth requirements
• Lowering the audios sampling rate
• Filtering high frequencies
• Performing other waveform

7
Audio Streaming Advantages

• Real time audio content.
• Low bandwidth media used.
• No waiting for downloading audio file.
• Internet users can enjoy a live online program.

8
Audio Streaming Applications

• Long-distance or automated training
• Seminars
• Concerts
• Speeches
• Music samples
• Online corporate messages
• Hear the news / Radio

9
Audio Formats

• Microsoft Windows Media Formats
• .avi, .asf, .asx, .rmi, .wav
• Moving Pictures Experts Group (MPEG)
• .mp3
• Musical Instrument Digital Interface (MIDI)
• .mid, .rmi
• Apple Quick Time, Macintosh AIFF Resource
• .qt, .aif, .aifc, .aiff, .mov
• UNIX Formats
• .au, .snd

10
Audio Streaming Products

• Window Media Technologies (Microsoft)
• RealSystem G2 (RealNetworks)
• Shockwave Streaming Audio (Macromedia)
• IBM Bamba (IBM)
• Streamworks (Xing Technology)
• Media Player (Netscape)

11
Windows Media Technologiesby Microsoft

• Leading digital media platform.
• Windows Media Technologies consist of
• Windows Media Player
• Windows Media Services
• Windows Media Tools
• Windows Media SDK
• Free download at http//www.microsoft.com/windows/
  windowsmedia/

12
Windows Media Technologies

• Windows Media Audio codec provides
  FM-radio-quality sound at half the bit rate of
  MP3
• Integration with other Microsoft products
  (Windows NT Server, Microsoft Site Server,
  Microsoft BackOffice)
• Digital rights management
• Advanced Compression Technology Broadcasting

13
WMT Advantages

• Wide bandwidth range
• Intelligent streaming
• Multiple bit rate encoding
• High scalability
• Built-in multicast service
• Seamless stream switching
• Easy Internet Radio Distribution

14
Real Networks

• High quality streaming audio at all bandwidths on
  both the Internet and corporate Intranets.
• Support realtime and on-demand, all sounds
  (stereo and mono)
• Take advantage of key features of Window 2000
  (load balancing, clustering, stability)
• Operating systems as Window NT, Linux, Sun
  Solaris

15
Real System G2 Products Advantages

• RealPlayer 7
• Over 150 live radio stations built-in, superb
  audio
• RealProducer 7
• Streaming Software Efficient encoding Reach the
  widest possible audience choice of operating
  systems
• RealPresenter G2
• Live/recorded capability Presentation Manager

16
RealSystem G2 Products Advantages

• RealSlideshow 2
• Combine pictures with music or speech, customize
  the layout of presentation
• RealServer 7
• 60 simultaneous sessions of live or on-demand
  streaming Near CD quality Internet audio
• Free download at
• http//www.realnetworks.com/products/

17
Video Streaming

• Video Streaming Objective
• Streaming Advantages
• Video Streaming Architecture
• Compression and Decompression-codec
• MPEG 1-4 Introduction
• Major Products and Features Comparison

18
Video Streaming Objective

• The object is to overcome the negative effects of
  physical distance and network technology
  limitation.

19
Streaming Advantages

• Reduce setup time
• Reduction in client storage requirement
• Video can be viewed in real time
• Transmission signals over low bandwidth
  facilities

20
Video Streaming Architecture

• Content Creation/Capture
• Content Management
• Content Formatting (Compression)
• Delivery
• Distribution
• Presentation (Viewing)
• View Control

21
Video Capture

• Converting analog to video signals
• A special video capture card to convert the
  analog signals to digital form and compresses the
  data.
• Also digital video devices that can capture
  images and transfer to a computer

22
Content Management

• Critical in video server
• The purpose including create, collect, catalog,
  organize, store, and access to massive multimedia
  information database

23
Video Input Formats

• AVI
• ActiveMovie
• Cinepak
• Indeo
• motion-JPEG

• MPEG
• QuickTime
• RealVideo
• Video for Windows
• XGA

24
Video FormatsAVI ASF

• Developed by Microsoft
• AVI (Audio Video Interleaved)
• - limited to 320x240 resolution
• - 30 frames per second
• ASF (Advanced Streaming Format)
• - Has been submitted to ISO for standardization
• - Expected to replace AVI format

25
Codec(Compressor/Decompressor)

• Coding techniques to compress video data
• The newest codec change their sampling rate as
  they run
• Choice of codec is the biggest factor to
  determine the bandwidth needed to connect the
  server and receive content
• Many of the codecs follow international standards

26
Content Compression

• MPEG (A working group of ISO)
• - The most common standard for video
• compression and file formats
• - Generally produce better quality video than
  other
• formats
• - High compression rate
• - MPEG1, MPEG2 and MPEG4

27
MPEG-1

• MPEG-1 was designed for coding progressive video
  at a transmission rate of about 1.5 million bits
  per second.
• It was designed specifically for Video-CD and
  CD-i media.
• MPEG-1 audio layer-3 (MP3) has also evolved from
  early MPEG work.

28
MPEG-2

• MPEG-2 was designed for coding interlaced images
  at transmission rates above 4 million bits per
  second.
• MPEG-2 is used for digital TV broadcast and
• DVD.
• An MPEG-2 player can handle MPEG-1 data as well.

29
MPEG-3

• A proposed MPEG-3 standard, intended for High
  Definition TV (HDTV), was merged with the MPEG-2
  standard when it became apparent that the MPEG-2
  standard met the HDTV requirements.

30
MPEG-4

• An MPEG-4 standard is in the final stages of
  development and release.
• It is a much more ambitious standard and
  addresses speech and video synthesis, fractal
  geometry, computer visualization, and an
  artificial intelligence (AI) approach to
  reconstructing images.

31
Major Products

• Microsoft Windows Media Technologies
• http//www.microsoft.com/windows/windowsmedia/
• RealSystem G2
• http//www.realnetwork.com

32
ComparisonWMT vs- RealSystem G2

• Head to head comparison
• Feature Comparison
• More Information http//www.microsoft.com/windows/
  windowsmedia/

33
ComparisonWMT vs- RealSystem G2

• Cost Analysis
• - Prepared by Approach, Inc.,
• Key findings
• - Both streaming products results in positive
• returns on investment
• - Microsoft solution is more economical than the
• RealNetwork solution
• Download in Word format

34
Audio Streaming Architecture

• Creating Audio File
• Demonstration of Streaming Software
• Demo of Streaming Process
• Windows Media Encoder
• RealProducer 7 Basic
• Play the Audio File

35
Creating Audio File

• Record From File
• Audio files located in your hard drive
• Record Form Media Device
• Media device such as Microphone, CD Player, PC
  Camera, etc.
• Live Broadcast
• Broadcast live media stream from your computer

36
Installation of Streaming Software

• Windows Media Tools
• Windows Media Encoder
• RealSystems G2
• RealProducer 7 Basic

37
Windows Media Technologies
Download Windows Media Tools
http//www.microsoft.com/windows/windowsmedia
38
RealSystem G2Download RealProducer
http//www.realnetworks.com/products/producer/
39
Playing Audio File

• Windows Media Player
• RealPlayer

40
Windows Media Player 6.4
http//www.microsoft.com/windows/windowsmedia/
41
Download RealPlayer
http//www.real.com/player/index
42
Real Player 7.0 Basic
43
Video Streaming Presentation

• Active Streaming Format (ASF)
• - MS Defacto standard for streaming video.
• Real Media (RM)
• - Reals standard for streaming video

44
Video Streaming

• Codec selections from Real Media.

45
Video Streaming

• Codec Selections from Windows Media.

46
Video Streaming

• Streaming with Real Producer.
• Real Producer.
• - C\Program Files\REAL\RealProducer\realprod.exe

47
Video Streaming

• Streaming with Windows Media Encoder .
• Windows Media.
• - C\Program Files\Windows Media
  Components\Tools\NsRex.exe

48
Video Streaming

• Using Windows Media Player.
• - C\Program Files\Windows Media
  Player\mplayer2.exe

49
Video Streaming

• Streamed file size comparison.
• - C\WINDOWS\EXPLORER.SCF
• Unstreamed .AVI file 155,290 KB
• RealMedia Streamed file .RM 483 KB
• Windows Media Streamed file .ASF 1,283 KB

50
Video Streaming Statistics
51
Video Streaming Statistics
52
Video Streaming

• Live feed Video Capture.
• - C\Program Files\Logitech\Logitech
  QuickCam\QuickCam.exe
• Stream from live feed.
• - C\Program Files\REAL\RealProducer\realprod.exe
  
• - C\Program Files\Windows Media
  Components\Tools\NsRex.exe

53
Audio/Video Streaming Summary

• Capture Audio/Video
• Create your file
• Install the streaming software
• Windows Media Tools http//www.microsoft.com/windo
  ws/windowsmedia/
• RealProducer 7 Basic http//www.realnetworks.com/p
  roducts/

54
Audio/Video Streaming Summary

• Play the Audio Stream File
• Windows Media Player 6.4
• http//www.microsoft.com/windows/windowsmedia/
  
• RealPlayer 7 Basic
• http//www.real.com/player/index

55
Questions and Answers