What is an ActiveX Video Codec?

An ActiveX video codec is an ActiveX software program or device that allows video compression and decompression for creating digital video. The ActiveX compression usually utilizes lossy data compression. In the past, video was only stored on magnetic tape as an analog signal. Upon the introduction of the compact disc, it became very easy to start storing and using videos in a digital form, and different video technologies began to emerge. Video and audio call for different customized compression methods, which led to the development of ActiveX Video Codec.

ActiveX Video Codec Design

ActiveX video codec seeks to represent a basically analog data structure in a digital way. Because of the analog video signals' design, which represent color and luma information separately, the first step to image compression in the ActiveX video codec is the representation and storing of the image in YCbCr color space. The YCbCr conversion provides improvement in compressibility by giving decorrelation of the color signals and the separation of luma signals, which is more important than the chroma signal. The ActiveX video codec uses a variety of chroma sub-sampling ratios for its compression needs.

The ActiveX video codec design is standardized; however, its decoding process has to be standardized to allow interoperability. Its encoding process is basically not specified in a standard form and its implementers can freely design their encoder whichever way they want, as long as the video can possibly be decoded in a certain manner. It is for this reason that the video quality produced by decoding in spite of using the same ActiveX video codec standard can differ from one encoder implementation to the next.

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Video ActiveX Codec – Fake ActiveX Video Codec

Because ActiveX video codec has become a standard in most videos, malware developers have used the popularity and importance of ActiveX video codec by developing their own version – the Video ActiveX Codec. Accordingly, Video ActiveX Codec is needed to watch videos. However, problems start after the installation of this fake video codec because what was actually installed in the system was not a video codec but Trojans, like Zlob. Upon the installation of Video ActiveX Codec, the Trojan Zlob program will start displaying System alerts informing the user that the computer is currently infected with Networm-i.Virus@fp, Trojan-Spy.Win32@mx, or any other viruses or Trojans. Such kinds of system alerts are displayed in order to scare the users and make them buy a fake anti-spyware program. After the installation of the Video ActiveX Codec, the homepage may suddenly be changed to a website advertising rogue anti-spyware program.

Users are advised not to trust the following sites:

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