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Media Streaming By Derek Aten Digital T.V. and HDTV Maria Preciado – Audio Streaming Genevieve Taduran – Data Streaming

Media Streaming-final.ppt

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Page 1: Media Streaming-final.ppt

Media Streaming

By Derek Aten – Digital T.V. and HDTVMaria Preciado – Audio Streaming

Genevieve Taduran – Data Streaming

Page 2: Media Streaming-final.ppt

Media Streaming

Streaming Media Streaming media is audio and video that is transmitted over the Internet in a streaming or continuous fashion, using data packets. The most effective reception of streaming media requires some form of broadband technology such as cable modem or DSL.

Page 3: Media Streaming-final.ppt

Introduction

Intro

Dividing a Station's Signal into Several "Channels"

Why Digital Pictures Are So Good

Interacting with TV Programs

Page 4: Media Streaming-final.ppt

Digital Television The idea of sending multiple programs within the 19.39

Mbps is unique to digital TV and is made possible by a

digital compression system.

The transmission is pure digital , along with reception and

display of those signals on the digital TV set.

Digital signals are transmitted through air, cable, and

satellite system.

Home use a decoder receives the signal and uses it, in

digital form, to directly drive your digital TV set.

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High Definition TV High-resolution digital television combined with Dolby Digital

surround sound.

New production and transmission equipment at the HDTV

stations, as well as new equipment for reception by the

consumer.

Imagine 720 or 1080 lines of resolution compared to 525 lines

used in US

There are 18 DTV formats and 6 are HDTV formats, 5 are

based on progressive scanning and 1 on interlaced scanning.

Remaning formats 8 are SDTV with 4 of them for wide screen

16:9 ratios, the other 4 are 4:3 for normal viewing. The other

4 remaining are video graphics VGA formats.

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Formats used in HDTV

720p – 1280*720 pixels progressive

1080i – 1920*1080 pixels interlaced

1080p – 1920*1080 pixels progressive

Sanning system Interlaced | Progressive

Interlaced format - the screen shows every odd line at the

screen, and follows that up with the even lines in a second

scan

Progressive format – scanning shows the whole picture, every

line in one showing. Better quality but more bandwidth.

High Definition TV

Page 7: Media Streaming-final.ppt

MPEG – 2 Digital TV is compressed and encoded using MPEG-2

Each image the MPEG-2 software records just enough of the

picture without making it look like something is missing.

Reduces the amount of data by about 55 to 1.

Standard for DVD video and some satellite TV broadcast

systems.

Compression reduces image quality from what is seen by the

digital camera at the studio.

The quality of the image is still better then analog TV.

HDTV receiver to interact with computer multimedia

applications directly

Page 8: Media Streaming-final.ppt

Audio Streaming

Page 9: Media Streaming-final.ppt

Audio Streaming •Audio streaming is a technique used for transferring audio

data

•Streaming technologies are becoming increasingly important

with the growth of the Internet

•With streaming, the client browser or plug-in can start

displaying the data before the entire file has been transmitted.

•For streaming to work, the client side receiving the data must

be able to collect the data and send it as a steady stream to the

application that is processing the data and converting it to

sound or pictures.

Page 10: Media Streaming-final.ppt

Type of Audio Streaming Applications

•Real Player

•Windows Media Player

•MusicMatch Jukebox

•Quicktime

Page 11: Media Streaming-final.ppt

Audio Streaming File Formats

The RealAudio Format•This format allows streaming of audio with low bandwidths. •Sounds stored in the RealAudio format have the extension .rm or .ram.

The AU Format•The AU format is supported by many different software systems over a

large range of platforms.  •Sounds stored in the AU format have the extension .au.

The AIFF Format

•The AIFF (Audio Interchange File Format) was developed by Apple.

•Sounds stored in the AIFF format have the extension .aif or .aiff.

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The WAVE Format

•The WAVE (waveform) format is developed by IBM and Microsoft.

•Sounds stored in the WAVE format have the extension .wav.

The MP3 Format (MPEG)

•MP3 files are MPEG files.

•MP3 is one of the most popular sound formats for music recording.

•Sounds stored in the MP3 format have the extension .mp3, or .mpga (for MPG

Audio).

Audio Streaming File Formats

Page 13: Media Streaming-final.ppt

Examples of Audio Streaming

The Killer Oldies

Website has a live

streaming radio.

www.killeroldies.com

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Streaming vs. Downloading

-Pros/Cons

Page 15: Media Streaming-final.ppt

Audio File Downloading

Pros- Provides more accurate data

streaming- Less errors in transmission

Cons- Takes up disk space

Page 16: Media Streaming-final.ppt

Audio Streaming

Pros- streaming server opens a

conversation with the media player

Cons- Data accuracy is not great- Allows for data distortion

Page 17: Media Streaming-final.ppt

DATA STREAMING

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OVERVIEW

Process Protocols Applications

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DEFINITION

continuous transmission of data Unicast Multicast

.

Page 20: Media Streaming-final.ppt

PROCESS

Record media Digitize and create files – editing

softwares Place and provide access to files

for streaming

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FILES

Different speeds - surestream (real media) - intelligent streaming (windows

media)

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MEDIA PLAYERS

Real Player - Real Networks Windows Media Player - Microsoft Quicktime Player - Apple Mpeg TV Player - Linux/Unix Pocket TV – Windows CE devices

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SERVERS

- Real Producer Basic- Windows Media Services- Windows Media Encoding Tools- QuickTime Streaming Server- QuickTime Pro

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PROTOCOLS- RTP (RFC 1889)- RSTP (RFC 2326)- Shoutcast Streaming Protocol (MP3 streaming, HTTP streaming, Icecast)- Microsoft MMS MMSU – UDP MMST – TCP- MSBD- HTTP (RFC 2616) – port 80

Page 25: Media Streaming-final.ppt

APPLICATIONS

Entertainment Trading Military Schools Business

.