This document discusses video formats and compression. It defines digital video as discrete video frames containing both audio and pictures. It describes common video file formats like MOV, AVI, MPEG, ASF and RM and their purposes. The document also discusses video compression techniques, identifying lossless and lossy compression and their advantages.
A presentation on the digital preservation of audiovisual materials, including a brief history of media formats and file types, among others. It's a bit of a rushed work, I admit, plus the text designs are not as smooth as before I converted the PPT to PDF format.
A presentation on the digital preservation of audiovisual materials, including a brief history of media formats and file types, among others. It's a bit of a rushed work, I admit, plus the text designs are not as smooth as before I converted the PPT to PDF format.
DB2 for z/OS - Starter's guide to memory monitoring and controlFlorence Dubois
DB2 for z/OS makes more and more use of REAL memory to improve performance and reduce cost. But if you don't carefully budget and monitor the use of REAL memory on your system, you could be putting your applications at risk. This presentation will go back to the basics and answer the most common questions about REAL memory management including: how does DB2 uses virtual and REAL memory? how to build a budget based on system settings and buffer pool sizes? how to size the LFAREA? what are the key performance indicators and how do I know I am running 'safely'? what can be done to protect the system?
Streaming video is content sent in
compressed form over the Internet and
displayed by the viewer in real time.
A Web user does not have to wait to
download a file to play it. Instead, the
media is sent in a continuous stream of
data and is played as it arrives.
DB2 for z/OS - Starter's guide to memory monitoring and controlFlorence Dubois
DB2 for z/OS makes more and more use of REAL memory to improve performance and reduce cost. But if you don't carefully budget and monitor the use of REAL memory on your system, you could be putting your applications at risk. This presentation will go back to the basics and answer the most common questions about REAL memory management including: how does DB2 uses virtual and REAL memory? how to build a budget based on system settings and buffer pool sizes? how to size the LFAREA? what are the key performance indicators and how do I know I am running 'safely'? what can be done to protect the system?
Streaming video is content sent in
compressed form over the Internet and
displayed by the viewer in real time.
A Web user does not have to wait to
download a file to play it. Instead, the
media is sent in a continuous stream of
data and is played as it arrives.
Unsure of the aspect ratio for your iPhone? Can’t tell a bit rate from a frame rate? At a loss when it comes to lossy and lossless codecs? Don’t worry, we’re here to help.
Encoding Video for Microsoft Silverlightgoodfriday
Learn how to optimize your video encoding quality regardless or the specific distribution and infrastucture approaches you use. Detailed scenarios will cover optimizing video encoding quality for progressive download, streaming, self-hosting, Windows Live Silverlight Streaming, and third-party content delivery networks (CDNs).
2. CMS Content Updating
In this chapter, you will learn:
o Define what is “digital video”
o Identify the various video format and their
characteristics
o Describe the advantages and disadvantages of
the various formats across platforms.
o Define what is “digital audio”
o Identify the various sound formats and its
characteristics
3. Video
Video is stream of data composed of
discrete frames, usually including both
audio and pictures
o US TV Signal = 30 fps
o European stations = 15 fps
o Movies = 24 fps
4. Video
Analog Video
o It is the representation of information by
variable physical quantities such as the size
of electrical voltages.
5. Video
• Digital Video
o is a sheet of dots, called pixels, each holding
colour value.
6. Video
Video File Format
File Platform Purpose
Extension
.MOV Mac, Win Mac’s * Once the movie is
QuickTime compressed, the
Video viewer must have the
.AVI Mac, Win Microsoft’s same compressor to
Audio Video play it back.
Interleaved
7. Video
Video File Format
File Platform Purpose
Extension
.MPEG Mac, Win, MPEG Video * Once the movie is
Unix Mac may compressed, the
have problem viewer must have the
with the audio same compressor to
track play it back.
8. Video
Video File Format
File Platform Purpose
Extension
.ASF Mac, Win Microsoft Both .RM and .ASF
streaming compression is
format intended to produce
a low data rate :
may discard data as well as
compress it, which is
important for streaming
used for distribution only
9. Video
Video File Format
File Platform Purpose
Extension
.RM Mac, Win, Used by Both .RM and .ASF
Unix RealNetworks compression is
streaming intended to produce
a low data rate :
may discard data as well as
compress it, which is
important for streaming
used for distribution only
10. Video
Cross Platform
Dynamic Data Exchange (DDE)
o allows data to be transmitted between client
and a server
o Hot link and/or cold link
11. Video
Cross Platform
Object Linking and Embedding (OLE)
o Lets you embed or link data objects created
in different OS app
o An embedded object becomes a part of the
file into which it is pasted
o A linked object is changed automatically in
when the original file is updated
12. Video Compression
Lossless compression
o The simplest form of digital video compression
takes advantage of spatial redundancy – i.e
areas of single picture that are the same.
Lossy Compression
o information is removed permanently.
13. Video Compression
Advantages of compression
o smaller amount of storage is needed
o compression allows highly miniaturized
equipment for consumer and professionals
o compression reduces the bandwidth needed
o allows faster-than-real-time transfer between
media.