Audio and video streaming

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 STREAMING AUDIO 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
.RM

Windows 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 Streaming Installation 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 Files\REAL\RealProducer\realprod.exe

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

48. Video StreamingVideo Streaming
•Using Windows Media Player.
- C:\Program Files\Windows Media Player\mplayer2.exe

49. Video StreamingVideo 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 StatisticsVideo Streaming Statistics

51. Video Streaming StatisticsVideo Streaming Statistics

52. Video StreamingVideo 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 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