Wednesday, February 25, 2009

PowerDVD-commercial media player-MSLinux

CyberLink PowerDVD is a commercial media player for Microsoft Windows and Linux. The latest version of the software is PowerDVD 8. Several editions of the software are sold including: Ultra, Deluxe and Standard. All editions support the viewing of DVD but only the Ultra edition supports Blu-Ray playback. HD DVD playback is not supported.

The product is distributed via physical install media (CD) or via download from the Cyberlink website. PowerDVD is often bundled with a variety of PC systems and peripherals (particularly optical drives).

HD DVD support was included in some versions of PowerDVD 7 but was removed from PowerDVD 8 because there will be limited new releases in this format as it is no longer supported by any major studio. It can be re-enabled through a workaround. Cyberlink advises users who want to keep HD DVD playback to buy the Ultra editions of PowerDVD 7 and 8 which can be installed together on the same system.

Wednesday, February 18, 2009

Voice command device

A voice command device is a device controlled by means of the human voice. By removing the need to use buttons, dials and switches, consumers can easily operate appliances with their hands full or while doing other tasks.

The first examples in home appliances are washing machines that allow consumers to operate washing controls through vocal commands, and mobile phones with voice-activated dialing.

Newer VCDs are speaker-independent, so they can respond to multiple voices, regardless of accent or dialectal influences. They are also capable of responding to several commands at once, separating vocal messages and providing appropriate feedback, accurately imitating a natural conversation. They can understand around 50 different commands and retain up to 2 minutes of vocal messages.

Tuesday, February 10, 2009


PowerVR is a division of Imagination Technologies (formerly VideoLogic) that develops hardware and software intellectual property for 2D and 3D rendering, and for video encoding, decoding, and associated image processing. In the late 1990s they competed heavily with 3dfx in the 3D accelerator market for desktop PC's and game consoles, but both companies were forced from this market by the rise of OpenGL, Direct3D and the ATI and NVIDIA cards that better supported these technologies.

Since then, the PowerVR technology has been aimed primarily at the low-power market and are now found inside many mobile devices such as palmtops and cellphones. PowerVR accelerators are not manufactured by PowerVR, but instead the IP is licensed to other companies such as NEC, Intel, Freescale, TI, and Samsung.

Tuesday, February 03, 2009


A microphone sometimes referred to as a mike (pronounced /mic) or—more recently—mic, is an acoustic-to-electric transducer or sensor that converts sound into an electrical signal. Microphones are used in many applications such as telephones, tape recorders, hearing aids, motion picture production, live and recorded audio engineering, in radio and television broadcasting and in computers for recording voice, VoIP, and for non-acoustic purposes such as ultrasonic checking.
A Neumann U87 condenser microphone

The most common design today uses a thin membrane which vibrates in response to sound pressure. This movement is subsequently translated into an electrical signal. Most microphones in use today for audio use electromagnetic induction (dynamic microphone), capacitance change (condenser microphone, pictured right), or piezoelectric generation to produce the signal from mechanical vibration.