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June 2011 |
The "Moving Picture Experts Group" (MPEG) is a working group of experts that was formed by ISO and IEC to set standards for audio and video compression and transmission.
-The MPEG compression methodology is considered "asymmetric" as the encoder is more complex than the decoder. The encoder needs to be algorithmic or adaptive whereas the decoder is 'dumb' and carries out fixed actions
| Acronym for a group of standards |
Title |
ISO/IEC standards |
First public release date
|
| MPEG-1 |
Coding of moving pictures and associated audio for digital storage media at up to about 1,5 Mbit/s |
ISO/IEC 11172 |
1993 |
| MPEG-2 |
Generic coding of moving pictures and associated audio information |
ISO/IEC 13818 |
1995 |
| MPEG-3 |
|
|
|
| MPEG-4 |
Coding of audio-visual objects |
ISO/IEC 14496 |
1999 |
| MPEG-7 |
Multimedia content description interface |
ISO/IEC 15938 |
2002 |
| MPEG-21 |
Multimedia framework (MPEG-21) |
ISO/IEC 21000 |
2001 |
| MPEG-A |
Multimedia application format (MPEG-A) |
ISO/IEC 23000 |
2007 |
| MPEG-B |
MPEG systems technologies |
ISO/IEC 23001 |
2006 |
| MPEG-C |
MPEG video technologies |
ISO/IEC 23002 |
2006 |
| MPEG-D |
MPEG audio technologies |
ISO/IEC 23003 |
2007 |
| MPEG-E |
Multimedia Middleware |
ISO/IEC 23004 |
2007 |
| (none) |
Supplemental media technologies |
ISO/IEC 29116 |
2008 |
| MPEG-V |
Media context and control |
ISO/IEC 23005 |
2011 |
| MPEG-M |
MPEG extensible middleware (MXM) |
ISO/IEC 23006 |
2010 |
| MPEG-U |
Rich media user interfaces |
ISO/IEC 23007 |
2010 |
| MPEG-H |
High-Efficiency Video Coding |
(planned ISO/IEC 23008) |
Under development |
Return to Advanced Features page
|
|
|
June 2011 |
Microsoft DirectX is a collection of application programming interfaces (APIs) for handling tasks related to multimedia, especially game programming and video, on Microsoft platforms.
A set of APIs developed by Microsoft that enables programmers to write
programs that access hardware features of a computer without knowing
exactly what hardware will be installed on the machine where the program
eventually runs.
DirectX achieves this by creating an intermediate
layer that translates generic hardware commands into specific commands
for particular pieces of hardware. In particular, DirectX lets
multimedia applications take advantage of hardware acceleration features
supported by graphics accelerators.
There are alternatives to the DirectX family of APIs, with OpenGL having the most features. Examples of other APIs include SDL, Allegro, OpenMAX, OpenML, OpenAL, OpenCL, FMOD, etc. Many of these libraries are cross-platform or have open codebases.
On November 10, 2000 Nvidia announced that it has fully implemented Microsoft's new DirectX
Video Acceleration (DirectX VA) standard, an application programming
interface (API) that optimizes the interactions between all of the
company's graphics processors and today's broad range of video decoder
software products. With full DirectX VA support, NVIDIA enables
accelerated video decoding, including copy protected DVD movies, under
Microsoft Windows 2000.
Return to Advanced Features page
|
|
|
June 2011 |
Microsoft DirectX is a collection of application programming interfaces (APIs) for handling tasks related to multimedia, especially game programming and video, on Microsoft platforms.
A set of APIs developed by Microsoft that enables programmers to write
programs that access hardware features of a computer without knowing
exactly what hardware will be installed on the machine where the program
eventually runs.
DirectX achieves this by creating an intermediate
layer that translates generic hardware commands into specific commands
for particular pieces of hardware. In particular, DirectX lets
multimedia applications take advantage of hardware acceleration features
supported by graphics accelerators.
There are alternatives to the DirectX family of APIs, with OpenGL having the most features. Examples of other APIs include SDL, Allegro, OpenMAX, OpenML, OpenAL, OpenCL, FMOD, etc. Many of these libraries are cross-platform or have open codebases.
On November 10, 2000 Nvidia announced that it has fully implemented Microsoft's new DirectX
Video Acceleration (DirectX VA) standard, an application programming
interface (API) that optimizes the interactions between all of the
company's graphics processors and today's broad range of video decoder
software products. With full DirectX VA support, NVIDIA enables
accelerated video decoding, including copy protected DVD movies, under
Microsoft Windows 2000.
Return to Advanced Features page
|
|
|
June 2011 |
•Allows us to pass electrical power safely, along with data, on Ethernet cabling
•Reduce installation costs (single cable)
•IEEE 802.3af -2003
-up to 15.4 W of DC
•IEEE 802.3at -2009
-a.k.a. PoE+ or PoE plus
-up to 25.5 W of DC
•Many PoE switches only support 802.3af
5015D requirements:
0.4A @ 48V = 19.2 W
Go back to Wireless Bridge home page
|
|
|
June 2011 |
•Allows us to pass electrical power safely, along with data, on Ethernet cabling
•Reduce installation costs (single cable)
•IEEE 802.3af -2003
-up to 15.4 W of DC
•IEEE 802.3at -2009
-a.k.a. PoE+ or PoE plus
-up to 25.5 W of DC
•Many PoE switches only support 802.3af
5015D requirements:
0.4A @ 48V = 19.2 W
Go back to Wireless Bridge home page
|
|
|
|
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