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Audio and Video StreamingAudio and Video Streaming
Presented by: Thanh LyLiqin ZhangRonald TogelangHector Frausto
AGENDA
• Introduction- D:\Introduction.avi
• Audio Streaming Overview• Video Streaming Overview• Audio Streaming Demonstration• Video Streaming Demonstration• Questions and Answers
AUDIO STREAMING AUDIO STREAMING OVERVIEWOVERVIEW
Audio File Features Audio Streaming Concept Audio Streaming Advantages Audio Streaming Applications Audio Streaming Format Audio Streaming Products
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
LAN, Intranet, Internet
Audio Streaming ConceptAudio Streaming Concept
.WAV Live Broadcast
.ASF
Real Producer.RM
Windows Media Encoder Real Producer 7.0
PC
Audio FormatPC
Windows MediaStreaming Software
Audio Streaming ConceptAudio Streaming Concept
Analog-to-Digital modulation Streaming audio technologies relies on:
Sound sequencesCompression schemes
Compression schemes (encoding) decreases the audio’s bandwidth requirements:Lowering the audio’s sampling rateFiltering high frequenciesPerforming other waveform
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.
Audio Streaming ApplicationsAudio Streaming Applications
Long-distance or automated training Seminars Concerts Speeches Music samples Online corporate messages Hear the news / Radio
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
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)
Windows Media TechnologiesWindows Media Technologiesby 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/
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
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
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
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
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/
Video StreamingVideo Streaming
Video Streaming Objective Streaming Advantages Video Streaming Architecture Compression and Decompression-codec MPEG 1-4 Introduction Major Products and Features Comparison
Video Streaming ObjectiveVideo Streaming Objective
The object is to overcome the negative effects of physical distance and network technology limitation.
Streaming AdvantagesStreaming Advantages
Reduce setup time Reduction in client storage requirement Video can be viewed in real time Transmission signals over low bandwidth facilities
Video Streaming ArchitectureVideo Streaming Architecture
Content Creation/Capture Content Management Content Formatting (Compression) Delivery Distribution Presentation (Viewing) View Control
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
Content ManagementContent Management
Critical in video server The purpose including create, collect, catalog,
organize, store, and access to massive multimedia information database
Video Input FormatsVideo Input Formats
AVI ActiveMovie Cinepak Indeo motion-JPEG
MPEG QuickTime RealVideo Video for Windows XGA
Video FormatsVideo FormatsAVI & 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
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
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
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.
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.
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.
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.
Major ProductsMajor Products
Microsoft Windows Media Technologies
http://www.microsoft.com/windows/windowsmedia/
RealSystem G2
http://www.realnetwork.com
ComparisonComparisonWMT –vs- RealSystem G2WMT –vs- RealSystem G2
Head to head comparison
Feature Comparison
More Information http://www.microsoft.com/windows/windowsmedia/
ComparisonComparisonWMT –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
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
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
Installation of Streaming Installation of Streaming SoftwareSoftware
Windows Media Tools– Windows Media Encoder
RealSystems G2– RealProducer 7 Basic
Windows Media TechnologiesWindows Media Technologies
http://www.microsoft.com/windows/windowsmedia
Download Windows Media ToolsDownload Windows Media Tools
RealSystem G2RealSystem G2Download RealProducerDownload RealProducer
http://www.realnetworks.com/products/producer/
Video Streaming PresentationVideo Streaming Presentation
• Active Streaming Format (ASF)
- MS Defacto standard for streaming video.• Real Media (RM)
- Real’s standard for streaming video
Video StreamingVideo Streaming
Streaming with Real Producer.
• Real Producer.
- C:\Program Files\REAL\RealProducer\realprod.exe
Video StreamingVideo Streaming
Streaming with Windows Media Encoder .
• Windows Media.
- C:\Program Files\Windows Media Components\Tools\NsRex.exe
Video StreamingVideo Streaming
• Using Windows Media Player.
- C:\Program Files\Windows Media Player\mplayer2.exe
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
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
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/
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
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