WMA

Reading: [daburiyuemue]
Full spelling: Windows Media Audio
Field:
Multimedia > sound/music > WMA
Expression of information > file format > WMA
Windows > Media technology > WMA

The speech compression system which the Microsoft corporation developed. At one of the technology which forms the multimedia technology “Windows Media” which is loaded onto Windows and the like of the same company, it is speech compression system of standard of the same company product.

WMA has adopted the irreversible compressed system which obtains high bulk compressibility similar to other principal compressed system, by between pulling the data of the part where the human is difficult to get wise. According to the same company, when WMA is used, while the sound quality like of music CD is maintained to approximately 1/22 (64kbps) being possible to compress, if the sound quality is designated as sacrifice, furthermore it can also obtain high bulk compressibility.

As for sound of WMA type, it is possible, to encode making use of the contents management system (DRM system) which is called “Windows Media Rights Manager” it distributes music, as the pay contents it is possible to prevent the fact that pirate edition is distributed with Internet.

WMF Windows meta file

Reading: Microsoft Windows meta file
Full spelling: Windows Meta File
Alias:
Microsoft Windows meta file
Field:
Multimedia > graphics > picture type > WMF
Expression of information > file format > WMF
Windows > Media technology > WMF

File format of the vector picture which Windows of the Microsoft corporation supports usually. The drawing order which controls GDI which is the graphic drawing program of Windows is written, the line segment and rectangle, can do the circular arc and the drawing etc of the text. With the old type where it is supported from Windows 1.0, after the Windows 95 EMF which expands this (Enhanced Meta File) type is adopted.

2005 end of year, vulnerability with respect to security was discovered by the portion of the program of Windows which processes the file of WMF type, being a possibility the optional cord/code which was imbedded to the WMF picture being executed was ascertained. “The picture just is perused with the serious vulnerability which makes the development of the virus which is infected” possible, disturbed the world as an unprecedented situation.

When at vulnerability one with respect to the security which is included in Windows of the Microsoft corporation, the vector graphics file of the WMF type which Windows supports usually is perused, those which is the possibility the optional cord/code which was imbedded being executed. It was discovered by 2005 end of year, year 2006 opened and the correction program was issued directly.

With the defect which is found in the graphic drawing function of Windows, by the fact that pattern of specification is inserted in the file of WMF type, it is possible to make the optional cord/code execute. “The picture just was perused with the serious vulnerability which makes the development of the virus which is infected” possible, disturbed the world as an unprecedented situation. Actually, also the virus which is infected making use of this vulnerability was developed & was released.

WMT

Reading: [daburiyuemutei]
Full spelling: Windows Media Technology
Field:
Multimedia > streaming > WMT
Windows > Media technology > WMT

Set of the basic software in order it draws up & to play back the contents of the streaming format “ASF” type which can handle the multimedia contents of sound and animated picture etc uniformly. The support of “WMA” of the speech compression format of MPEG-4 and the high sound quality which are the animated picture format of high picture quality (code name “MS Audio”) was added from version 4.0. WMT has the contents management system which is called Windows Media Rights Manager, encodes the contents and use distribution condition and the like and also because it is possible, to distribute, distributes music, as the pay contents it is possible to prevent the fact that pirate edition is distributed with Internet.

WMV

Reading: [daburiyuemubui]
Full spelling: Windows Media Video
Field:
Multimedia > animated picture > WMV
Expression of information > file format > WMV
Windows > Media technology > WMV

The animated picture type which the Microsoft corporation developed on the basis of MPEG-4 of animated picture compressed standard. It is the media player of Windows standard, one of the type which “Windows Media Player” supports usually.

The bulk compressibility which is designed network transmission by prerequisite, is high, support of streaming playback and correspondence etc to control of the copy with DRM (copyright protective technology) is a special feature.

Wnn

Reading: [unnu]
Full spelling: Watashino Namaeha Nakanodesu
Field:
OS > UNIX > Wnn
Software > type > Japanese input > Wnn

It was developed in 1987 Omuron and ground TEX, by the Kyoto university, the Japanese input system. We have become client server system, the dictionary can be managed monistically with the server. From the fact that it is released as the freeware it has become the standard Japanese input system on UNIX. “My name is Nakano, (Watashino Namaeha Nakanodesu)” with this name was attached from the fact that it can lump together can convert the sentence which is said. It was the freeware to Wnn4, but up-to-date Wnn6 is the compensatory commercial business software.

W-OAM

Reading: [daburiyuoeemu]
Full spelling: WILLCOM Optimized Adaptive Modulation
Field:
Portable telephone > PHS > W-OAM
Portable telephone > data communication > W-OAM

It was serviced was started in 2006 February, the advancement PHS standard of Will COM. High speed communication is made possible by changing the system which modulates the data in the carrier according to radio wave state. The communication card which corresponds is needed for utilization.

Modulation technique of former PHS communication was QPSK which utilizes the phase where four differs (Quadrature Phase Shift Keying), but when with W-OAM radio wave state is good, when 8PSK which utilizes eight phases (8-Phase Shift Keying) with high speed communication, radio wave state is bad, BPSK which utilizes two phases (Binary Phase Shift Keying) with low speed the communication which is difficult to be cut off in stability is done. These changes are done automatically with judgment of the communication device. At the time of 8PSK communication the communication with of the highest 51kbps which reaches former approximately 1.6 times being possible, channel 8 with the 8x packet transmission which does communication simultaneously the highest 408kbps, channel 4 with the 4x packet transmission which does communication simultaneously the communication with of the highest 204kbps is possible.

WOL

Reading: [ueikuonran]
Full spelling: Wake ON LAN
Field:
LAN > Network management > WOL

The computer which is connected to LAN the function which by way of the network is started from the other computer. There is a merit such that at the enterprise and the like which manages many personal computers, by the fact that the personal computer which had WOL function is introduced, to go to the occasion where the network manager manages the personal computer of remote place and the [te] it does not have. In order to utilize this function, the network card, correspondence of motherboard, BIOS and OS etc is needed.

WordPerfect

Reading: Word perfect
Field:
Software > type > office software > word processor > WordPerfect