It creates a bit-for-bit duplicate of the original audio file so that no data is lost, which makes it ideal for archiving content masters.
Depending on the complexity of the original, content will be compressed at a or ratio. Although this is lower than the ratio achieved with other Windows Media Audio 9 Series codecs, it provides the same benefits of compression while leaving the data intact.
Like Windows Media Audio 9 Professional, the Windows Media Audio 9 Lossless codec also offers dynamic range control using the maximum and average audio amplitudes that are calculated during the encoding process. Using the Quiet Mode feature in Windows Media Player 9 and later, users can hear the full dynamic range, a medium difference range up to 12 dB above the average, or a little difference range up to 6 dB above the average.
This low-bit-rate codec is primarily targeted for speech content, but performs very well with mixed-mode content that includes both voice and music.
In voice mode, the codec takes advantage of the relatively less complicated and narrower frequency range of the human voice to maximize compression.
In music mode, the codec operates like the standard Windows Media Audio 9 codec. Encoded content can be configured to switch between voice and music modes automatically. The Windows Media Audio 9 Voice codec offers superior quality for low-bit-rate streaming scenarios less than 20 Kbps , such as radio broadcasts, advertising, e-books, podcasts, and voiceovers. The voice codec can also compress content to as low as 4 Kbps at 8 kHz. The following table outlines what your audience will experience when playing Windows Media Audio 9 Series content on earlier Microsoft Windows operating systems than Windows XP or with earlier versions of Windows Media Player.
Formal standardization of VC-1 represents the culmination of years of technical scrutiny by over 75 companies, leading to a codec that is well-documented, extremely stable, easily licensable, and accepted by the industry. VC-1 supports three profiles: Simple, Main, and Advanced. The Simple and Main profiles have been complete for several years, and existing implementations such as WMV 9 have long supported the creation and playback of content using these profiles, as well as an early implementation of the Advanced profile.
The completion of the Advanced profile and consequent standardization of all profiles in VC-1 represents the final step in a comprehensive specification that delivers high definition content—either interlaced or progressive—across any medium and to any capable device. It supports Simple, Main, and Advanced profiles. These profiles support a wide range of bit rates, from high-definition content at one-half to one-third the bit rate of MPEG-2, to low-bit-rate Internet video delivered over a dial-up modem.
This codec also supports professional-quality downloadable video with two-pass and variable bit rate VBR encoding.
Windows Media Video 9 is already supported by a wide variety of players and devices. VSFilter v2. CDXA Reader v1. GSpot Codec Information Appliance v2. Software similar to Media Player Codec Pack 4. K-Lite Mega Codec Pack X Codec Pack 2. X Codec Pack is one of the most complete codec packs which helps you to play all major audio and video formats.
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