notability date September 2011 primary sources date September 2011 QDesign Corporation was a leader in digital audio compression technologies. The companies MP2 and MP3 technologies were used in professional audio and broadcast automation systems as well as multimedia and video production systems. However, QDesign is most well known for their music codec , originally known as LBpack, developed by Dmitry Shmunk. QDesign licensed the initial version of the codec and hired the developer to create what would become the official audio compression in Apple Computer s QuickTime v3. The codec s official name is RaveSound , ref http www.qdesign.com news archives 01 06 98.htm ref but is commonly called QDesign Codec. It is optimized to compress quite well at very low bitrates, but its aggressiveness introduces audible artifacts at higher bitrates. The QDesign codec made it possible to deliver full bandwidth stereo audio over a 28K modem thus surpassing RealAudio in delivering high quality real time audio over the Internet during the early days of streaming media. The personal version comes with QuickTime Pro and allows encoding at bitrates up to 48 kbit s. The professional version allows bitrates up to 128 kbit s. Apple is now steering away from proprietary codecs in QuickTime like Sorenson Video and QDesign, and focusing on standards MPEG 4 . In recent years, usage of QDMC has generally been eschewed in favor of Advanced audio coding AAC . The company continued its advances in digital audio compression and security to introduce QDX , a proprietary audio format targeted at providing the music industry with a solution to secure digital music distribution. The Company was acquired in 2002 by DTS. References Reflist External links http web.archive.org web 20090201092625 http qdesign.com products about products qdmc OSX.htm QDMC s site at QDesign backup at WayBack Machine . QDesign ... ReallyRareWares backup at Wayback Machine . Category Audio codecs de QDesign Music Codec ... more details
Multiple issues notability September 2011 primarysources September 2011 orphan February 2009 QDX is an old Audio data compression lossy audio compression format, designed for portable multimedia players with small amount of memory. Overview QDX files are encoded at 128 kbit s but bitrate can be Bitrate peeling peeled so that lower bitrate stream can be extracted and saved on portable player up to 2.5 hours of music on a 32 MB without need of transcoding, which is called Fit To Media. What is more, this format is resistant to dropouts while streaming, which is called Fit To Stream. QDX format also offers Digital Rights Management DRM info, which prevents from unauthorized use of files. Hardware support iriver iDP 100 can play QDX files. http www.iriver.com html product prpa product.asp?pidx 30 See also QDesign Comparison of audio formats External links http www.qdesign.com QDESIGN http www.qdesign.com products about products qdx.htm Info on QDESIGN http www.digitalprosound.com Htm New Media 2000 July QXDtech.htm QDesign New QDX Compression Format Announced for Fall 2000 Category Data compression Category Audio codecs multimedia software stub pl QDX ... more details
Refimprove date February 2007 PowerHouse is a trademarked name for a Bytecode byte compiled fourth generation programming language or 4GL originally produced by Quasar Corporation later renamed Cognos Incorporated for the Hewlett Packard HP3000 mini computer. It was initially composed of five components QDD, or Quasar Data Dictionary for building a central data dictionary used by all other components QDesign a character based screen generator Quick an interactive, character based screen processor running screens generated by QDesign Quiz a report writer QTP a batch transaction processor. History PowerHouse was introduced in 1982 and bundled together in a single product Quiz and Quick QDesign, both of which had been previously available separately, with a new batch processor QTP. In 1983, Quasar changed its name to Cognos Corporation and began porting their application development tools to other platforms, notably Digital Equipment Corporation s VAX , Data General s Eclipse MV , and IBM s AS 400 , along with the UNIX platforms from these vendors. Cognos also began extending their product line with add ons to PowerHouse for example, Architect and end user applications written in PowerHouse for example, MultiView . Fact date February 2007 Subsequent development of the product added support for platform specific relational databases, such as HP s Allbase SQL , DEC s Oracle Rdb Rdb , and Microsoft s Microsoft SQL Server SQL Server , as well as cross platform relational databases such as Oracle Database Oracle , Sybase SQL Server Sybase , and IBM s IBM DB2 DB2 . The PowerHouse language represented a considerable achievement. Says who date March 2011 Compared with languages like COBOL , Pascal programming language Pascal and PL 1 , PowerHouse substantially cut the amount of labour required to produce useful applications on its chosen platforms. It achieved this through the use of a central data dictionary, a compiled file that extended the attributes of data fields nativel ... more details
, ATRAC3 , QDesign , and MP3pro formats appear in some tests, despite much lower adoption as of 2007 ... s stereo music codec in Helix Producer 10 QDesign Music Codec 2 Pro 32 kbit s at 32 kHz, Quality mode ... more details
MIDI MP3 MPEG 1 Audio Layer 3 MP3 Pulse code modulation PCM QCELP Qualcomm PureVoice QDesign WAV Waveform ... 3.0, including the Sorenson Video codec for advanced video compression, the QDesign Music codec ... issues LZW patent . Support for the QDesign Music 2 and MPEG 1 Layer 3 audio MP3 QuickTime 4 was the first ... more details
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