#42002/7/2 18:02:28
微软的那个叫“ Corona":
这里有片文章可以看一下！
Microsoft's Corona technology gained some momentum at NAB2002, with several digital media creation tools vendors announcing their support for the company's next generation Windows Media technology. Corona, the code-name for the Redmond, WA company's next generation streaming media solution promises to provide several features to content creators in the area of audio and video that have never been offered before in the category. The company says it will introduce by this Summer two new professional-level video and audio codecs.
For media creators and filmmakers, this could bode well in their efforts to output a low bandwidth, high-quality video and audio experience for distribution. Filmmakers have already embraced the technology. Director Larry Fessenden released WENDIGO in March using Windows Media Corona technology. The capability to offer lower bandwidths yet retain high image quality could enable artists to get their creations out to the masses at reduced costs in bandwidth than those incurred today with current technologies, provided the claims that Microsoft puts into its marketing of the technology are valid. If the claims prove true, as we will see this summer when Corona becomes a de facto product, new opportunities will arise that will enable content creators--from digital filmmakers to corporate media creation jockeys, to wedding videographers--to create, output and distribute content with high quality video and audio to DVD, via the Web, and other message mediums.
NAB2002 was a half-way point of sorts for Microsoft and its developers that have embraced Corona. The partial list below details some of the companies that have joined with Microsoft in promoting Corona, and what hardware and software they are offering in their efforts to assist digital artists in exploiting the new technology.
For audio professionals, Corona is expected to provide six channel surround sound with full spectrum, full resolution audio on the Web at 24-bit/96kHz sampling. Audio companies that are working to implement the technologies in their products include: Creative Labs, Inc. which previewed its Sound Blaster Audigy 5.1 line of sound cards. Audigy currently supports 24-bit/96kHz formats over a digital I/O, making it compatible with AES-EBU-compliant professional audio equipment. Digital music creators can also take advantage of Audigy's EAX ADVANCED HD optimized driver, which enables low-latency ASIO support for low-latency multi-track recording.
Echo Audio showcased its Echo 5.1 PCI-based pro-level capture and playback solution that supports multichannel Windows Media Audio professional with support for Corona.
M-Audio/Midiman previewed its Delta 1010 PCI digital recording system supporting playback of WMA Professional Audio.
Steinberg Media AG demonstrated a Windows Media Audio Professional Export plugin running on its Steinberg Nuendo multitrack recording and editing application. The company also showcased multitrack playback using Windows Media.
Syntrillium Software's Cool Edit Pro 2.0 application will support Corona with the capability
to encode 5.1 audio channels to a single Windows Media Audio stream at various bit
resolutions and sampling rates.
For video professionals, Microsoft promises that Corona will give content creators the
capability to produce DVD-quality standard definition video at one-half the data rate of
MPEG-2, depending on the complexity of the data. This feat, the company claims, will make it possible to burn two to three times as much SD video on a single DVD than what is currently available today. In addition, the new Corona video codec will offer the capability to offer high definition 720p video resolutions (for playback on a PC) at file sizes up to 50 percent smaller than that of today's DVDs.
Vendors that have announced commitment to the new Windows Media technology include Adobe Systems, which says that its Premiere and After Effects dynamic media creation tools will offer support of Corona through plugins, giving the users of those tools the capability to create media with Corona specifications in mind.
Accom has readied its WSD/HDX digital disk recorder with support for Corona. Its UI-based tool will offer one-button encode functionality. Avid Technology demonstrated its high-end Avid DS|HD with Corona support. It showcased the Avid system exporting out to Corona's high definition Windows Media Video. Discreet previewed its Cleaner encoding application with support for Corona-based HD encoding and playback capabilities.
Drastic Technologies demonstrated its next digital disk recorder with the capability to capture SD and HD source files to native uncompressed Windows Media.
Thomson Broadcast demonstrated its Grass Valley Aqua Internet Encoder with Corona support. Aqua offers real-time capture and digitization of video from any source--camera, file, tape, or media, as well as output to Windows Media Corona video.
Winnov showcased its XStreamEngine Broadcaster digitizing video to the Corona specification.
The NAB2002 trade show enabled vendors to show support for Microsoft's new streaming Windows Media solution. This Summer we will see if everything that Microsoft says Corona can do, will do. There has always been a tradeoff when it comes to optimizing video and audio for Internet distribution and playback. If you want high quality, you can't have low bandwidth. If you want low bandwidth, you can't have high quality. If what Microsoft says is true, that its Corona technology will give media creators both high quality AND low bandwidth, then the gates will open wider for those who wish to create high-quality, low bandwidth digital media for mass distribution.
