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Audio and Video Streaming

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Audio files are compressed for storage or faster transmission ... C:Program FilesLogitechLogitech QuickCamQuickCam.exe. Stream from live feed. ... – PowerPoint PPT presentation

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Title: 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
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