HDX4
Encyclopedia
HDX4 is an MPEG-4
MPEG-4
MPEG-4 is a method of defining compression of audio and visual digital data. It was introduced in late 1998 and designated a standard for a group of audio and video coding formats and related technology agreed upon by the ISO/IEC Moving Picture Experts Group under the formal standard ISO/IEC...

 codec developed by a German company named Jomigo Visual Technology.
Benchmark tests of c't (a renowned German computer magazine), issue 05/2005 and Doom9.org showed that it was the fastest codec among the ones tested, with the downside of a slightly lesser encoding efficiency. It is, among others, compatible with DivX, Xvid and Nero Digital.

The MPEG-4 implementation in HDX4 follows the specification guidelines of ISO/IEC 14496-2, also known as Simple Profile and Advanced Simple Profile.

The HDX4 codec ships bundled with the "HDX4 Movie Creator" suite, a software which claims to be optimized especially for the creation of videos for portable devices, but which is also capable of creating professional video content in High Definition or for streaming purposes in MP4.

As of now, the codec is more widely used in commercial fields, for example at Lufthansa, a German airline, and the Fraunhofer IGD in Darmstadt, Germany. Fraunhofer IGD employs HDX4 for its video conferencing system Communitrust. Apart from the commercial field, there are also various consumer applications which can make use of the HDX4 codec, due to its support of proprietary Microsoft Windows interfaces. By using an application like e.g. MovieJack, the HDX4 codec can be used to convert a variety of video formats into content which is suitable for playback on mobile phones (3GPP
3GPP
The 3rd Generation Partnership Project is a collaboration between groups of telecommunications associations, known as the Organizational Partners...

), iPod or the PlayStation Portable.

In addition to the plain HDX4 codec, there are also several SDKs available, these encapsulate functionalities like the creation of content in MPEG-4, H.264, AAC
Advanced Audio Coding
Advanced Audio Coding is a standardized, lossy compression and encoding scheme for digital audio. Designed to be the successor of the MP3 format, AAC generally achieves better sound quality than MP3 at similar bit rates....

, AMR-NB, G.726
G.726
G.726 is an ITU-T ADPCM speech codec standard covering the transmission of voice at rates of 16, 24, 32, and 40 kbit/s. It was introduced to supersede both G.721, which covered ADPCM at 32 kbit/s, and G.723, which described ADPCM for 24 and 40 kbit/s. G.726 also introduced a new...

, 3GP
3GP
3GP is a multimedia container format defined by the Third Generation Partnership Project for 3G UMTS multimedia services. It is used on 3G mobile phones but can also be played on some 2G and 4G phones....

, MP4, ASF
ASF
In computing:* Advanced Systems Format , a Microsoft streaming format associated with Windows Media Player....

formats and containers, as well as special functions like dynamic upscaling and picture optimization.

External links

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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