Check out how does Audio and video streaming work in technology, advantages drawbacks type conversation and more.

1. Audio and Video StreamingAudio 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 STREAMINGAUDIO STREAMING
OVERVIEWOVERVIEW
 Audio File Features
 Audio Streaming Concept
 Audio Streaming Advantages
 Audio Streaming Applications
 Audio Streaming Format
 Audio Streaming Products

4. Audio File FeaturesAudio 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. LAN, Intranet,
Internet
Audio Streaming ConceptAudio Streaming Concept
.WAV
Live Broadcast
.ASF
Real Producer
.RMWindows Media Encoder
Real Producer 7.0
PC
Audio Format
PC
Windows Media
Streaming
Software

6. Audio Streaming ConceptAudio Streaming Concept
 Analog-to-Digital modulation
 Streaming audio technologies relies on:
Sound sequences
Compression schemes
 Compression schemes (encoding) decreases the
audio’s bandwidth requirements:
Lowering the audio’s sampling rate
Filtering high frequencies
Performing other waveform

7. Audio Streaming AdvantagesAudio 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 ApplicationsAudio Streaming Applications
 Long-distance or automated training
 Seminars
 Concerts
 Speeches
 Music samples
 Online corporate messages
 Hear the news / Radio

9. Audio FormatsAudio 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 ProductsAudio 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 TechnologiesWindows Media Technologies
by Microsoftby 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 TechnologiesWindows 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 AdvantagesWMT 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 NetworksReal 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 &Real System G2 Products &
AdvantagesAdvantages
 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 StreamingVideo 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 ObjectiveVideo Streaming Objective
 The object is to overcome the negative effects of
physical distance and network technology
limitation.

19. Streaming AdvantagesStreaming 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 ArchitectureVideo Streaming Architecture
 Content Creation/Capture
 Content Management
 Content Formatting (Compression)
 Delivery
 Distribution
 Presentation (Viewing)
 View Control

21. Video CaptureVideo 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 ManagementContent Management
 Critical in video server
 The purpose including create, collect, catalog,
organize, store, and access to massive multimedia
information database

23. Video Input FormatsVideo Input Formats
 AVI
 ActiveMovie
 Cinepak
 Indeo
 motion-JPEG
 MPEG
 QuickTime
 RealVideo
 Video for Windows
 XGA

24. Video FormatsVideo Formats
AVI & ASFAVI & 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. CodecCodec
(Compressor/Decompressor)(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 CompressionContent 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-1MPEG-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-2MPEG-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-3MPEG-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-4MPEG-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 ProductsMajor Products
 Microsoft Windows Media Technologies
http://www.microsoft.com/windows/windowsmedia/
 RealSystem G2
http://www.realnetwork.com

32. ComparisonComparison
WMT –vs- RealSystem G2WMT –vs- RealSystem G2
 Head to head comparison
Feature Comparison
 More Information http://www.microsoft
.com/windows/windowsmedia/

33. ComparisonComparison
WMT –vs- RealSystem G2WMT –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 ArchitectureAudio 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 FileCreating 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 StreamingInstallation of Streaming
SoftwareSoftware
 Windows Media Tools
– Windows Media Encoder
 RealSystems G2
– RealProducer 7 Basic

37. Windows Media TechnologiesWindows Media Technologies
http://www.microsoft.com/windows/windowsmedia
Download Windows Media ToolsDownload Windows Media Tools

38. RealSystem G2RealSystem G2
Download RealProducerDownload RealProducer
http://www.realnetworks.com/products/producer/

39. Playing Audio FilePlaying Audio File
 Windows Media Player
 RealPlayer

40. Windows Media Player 6.4Windows Media Player 6.4
http://www.microsoft.com/windows/windowsmedia/

41. Download RealPlayerDownload RealPlayer
http://www.real.com/player/index

42. Real Player 7.0 BasicReal Player 7.0 Basic

43. Video Streaming PresentationVideo Streaming Presentation
• Active Streaming Format (ASF)
- MS Defacto standard for streaming video.
• Real Media (RM)
- Real’s standard for streaming video

44. Video StreamingVideo Streaming
• Codec selections from Real Media.

45. Video StreamingVideo Streaming
• Codec Selections from Windows Media.

46. Video StreamingVideo Streaming
Streaming with Real Producer.
• Real Producer.
- C:Program FilesREALRealProducerrealprod.exe

47. Video StreamingVideo Streaming
Streaming with Windows Media Encoder .
• Windows Media.
- C:Program FilesWindows Media ComponentsToolsNsRex.exe

48. Video StreamingVideo Streaming
• Using Windows Media Player.
- C:Program FilesWindows Media Playermplayer2.exe

49. Video StreamingVideo Streaming
• Streamed file size comparison.
- C:WINDOWSEXPLORER.SCF
• Unstreamed *.AVI file = 155,290 KB
• RealMedia Streamed file *.RM = 483 KB
• Windows Media Streamed file *.ASF = 1,283 KB

50. Video Streaming StatisticsVideo Streaming Statistics

51. Video Streaming StatisticsVideo Streaming Statistics

52. Video StreamingVideo Streaming
• Live feed Video Capture.
- C:Program FilesLogitechLogitech QuickCamQuickCam.exe
• Stream from live feed.
- C:Program FilesREALRealProducerrealprod.exe
- C:Program FilesWindows Media ComponentsToolsNsRex.exe

53. Audio/Video Streaming SummaryAudio/Video Streaming Summary
 Capture Audio/Video
– Create your file
 Install the streaming software
– Windows Media Tools
http://www.microsoft.com/windows/windowsmedia/
– RealProducer 7 Basic
http://www.realnetworks.com/products/

54. Audio/Video Streaming SummaryAudio/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 AnswersQuestions and Answers