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BitJazz
SheerVideo FAQ
Uses: Genres

Is SheerVideo useful for animation?

Is SheerVideo useful for computer-generated imagery?

Is SheerVideo useful for film?

Is SheerVideo useful for games?

Is SheerVideo useful for high-definition video?

Is SheerVideo useful for home videos?

Is SheerVideo useful for medical imaging?

Is SheerVideo useful for satellite imaging?

Is SheerVideo useful for scientific imaging?

Is SheerVideo useful for still photography?

Is SheerVideo useful for the Web?

Is SheerVideo useful for titling?

Is SheerVideo useful for video?

SheerVideoIs SheerVideo useful for video?

Yes, SheerVideo is designed for professional-quality video. SheerVideo is tuned for the high detail of real-world imagery found in studio-quality and broadcast-quality video, and SheerVideo supports all popular 8-bit pro video formats, including SD and HD and arbitrary resolution, progressive and interlaced, NTSC and PAL/SECAM, 4:3 and 16:9 and arbitrary aspect ratio, RGB and Y'CbCr, 4:2:2 and 4:4:4[:4]. SheerVideo compresses any such data by an average power of 2.2, with absolutely no image degradation, in real time, on the fly, cutting storage and transmission requirements in half. SheerVideo saves time, space, and money in all phases of video production, including capture, editing, postproduction, and archival.

As an example of its utility for video, SheerVideo makes it possible to stream perfect-fidelity SD video to or from an ordinary hard disk without SCSI or RAID in real time. As another example, SheerVideo makes it possible to stream perfect-fidelity HD video at the highest definition (1920 x 1080 p/f at 30 f/s) in real time over FireWire 800 to or from a camera or software-RAIDed ordinary FireWire hard disk drives.

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SheerVideoIs SheerVideo useful for high-definition video?

Yes, SheerVideo is optimal for High-Definition video. Because of its power, SheerVideo halves the enormous HD video file sizes, and halves the huge bandwidth required to transmit HD. And, because of its power and speed, SheerVideo also halves the storage, transmission, and retrieval times required for HD, even when encoding and decoding on the fly.

As a result, SheerVideo makes it possible to use cheaper storage and transmission solutions. For example, SheerVideo makes it possible to transmit the highest-definition HD, 1920 x 1080 pixels at 30 frames per second, over a single FireWire 800 link in real time. Or to stream real-time HD to or from ordinary hard disks software-RAIDed on a FireWire 800 bus.

And SheerVideo does this with perfect fidelity. Moreover, SheerVideo supports the Y'PbPr and Y'CbCr 8b 4:2:2 and 4:4:4[:4] pixel formats used for HD.

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SheerVideoIs SheerVideo useful for film?

Yes, SheerVideo is ideal for digitized film. Film producers, being used to the superior quality of film, demand the utmost quality in digital film production. SheerVideo delivers perfect fidelity. And because SheerVideo halves scanned file sizes, bandwidth requirements, storage & retrieval times, and transmission times, SheerVideo makes it possible to double the resolution being used for the digitized film, with no increase in storage and transmission costs.

In addition, because SheerVideo is so fast and cuts the video data rate in half, SheerVideo makes it possible to view scanned film in real time on a moderately fast personal computer such as a dual-CPU 1.25 GHz Mac at the current standard wide-screen resolution of 2048 x 1152 pixels at 24 frames per second.

And of course, SheerVideo supports RGB[A] 8b, the format preferred by film producers because of its similarity to film's color space.

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SheerVideoIs SheerVideo useful for computer-generated imagery?

Yes, SheerVideo is ideal for naturalistic Computer Generated Imagery. Most CGI creators strive for perfection, and aren't willing to put up with anything less than perfect fidelity. SheerVideo offers perfect fidelity, but at twice the speed of uncompressed video, and with half the file size. And SheerVideo supports the RGB[A] formats preferred by CGI artists.

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SheerVideoIs SheerVideo useful for medical imaging?

Definitely. SheerVideo is ideally suited for medical imaging. Medical imaging devices produce enormous amounts of information at great cost, which are used to make life-or-death decisions. SheerVideo can halve this volume of data, on the fly as it is produced, and thereby halve the storage and retrieval times. And SheerVideo maintains perfect fidelity, so that life-critical diagnoses are based solely on real data, and not based on compression artifacts.

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SheerVideoIs SheerVideo useful for scientific imaging?

Absolutely. SheerVideo is perfect for scientific imaging. In scientific imaging, rare or otherwise difficult-to-reproduce events are captured at great expense on tight budgets, often in situations pushing the limits of imaging technology. SheerVideo compresses these hard-won data to half their bulk, with perfect fidelity, permitting them to be stored and transmitted in half the time and half the bandwidth. This in turn makes it possible to push the technology even further, and double the shutter speed or resolution.

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SheerVideoIs SheerVideo useful for satellite imaging?

Unquestionably. SheerVideo is perfect for satellite imaging. Satellites and space probes produce prodigious amounts of image data at tremendous expense, but the severe constraints on the amount of data they can store and transmit back to earth require them to discard much of this valuable information, either through the use of approximating compression, or by wholesale culling of images. SheerVideo can compress this data in real time on the fly to less than half the data rate with perfect fidelity, so that it takes less than half the storage space, less than half the storage time, less than half the transmission time, and less than half the transmission bandwidth, permitting twice as many images to be stored and transmitted in the available space, bandwidth, and time. In turn, doubling the storage speed, which is usually the limiting factor, makes it possible to double the spatial, spectral, or temporal resolution of the imaging device. Alternatively, this advantage can be translated into smaller, lighter, cheaper components requiring less energy in space-based systems.

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SheerVideoIs SheerVideo useful for still photography?

Yes, SheerVideo is particularly useful for high-quality high-resolution digital photographs. BitJazz has not yet focussed on applying Sheer technology to still photography, and has not yet defined a SheerPhoto file format, but photographers and digital artists can already take advantage of SheerVideo's speed, power, and perfect fidelity by storing RGB[A] Sheer-encoded still images in QuickDraw Picture (PICT) files or QuickTime Image (QTIF) files. SheerVideo PICT files can be opened by any application that knows how to open PICT files, which is essentially all Mac applications that use pictures in any way.

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SheerVideoIs SheerVideo useful for animation?

Sometimes. For traditional 2-dimensional animation, Apple's Animation codec is the best choice, because it compresses such material much more than SheerVideo. And unlike SheerVideo, the Animation codec also supports low-precision color modes that are ideal for constant-shaded animation.

However, for more-realistically shaded animation, SheerVideo compresses better than the Animation codec, which looks for runs of identical pixels. And for naturalistic 3-dimensional animation such as Pixar's work, SheerVideo compresses twice as well as the Animation codec. SheerVideo also compresses twice as fast as Animation, although Animation decompresses 23% slower. Note that SheerVideo supports both RGB[A] 8b formats, for film animation, and Y'CbCr[A] 8b 4:4:4[:4] and 4:2:2 formats, for television and direct-to-video animation.

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SheerVideoIs SheerVideo useful for titling?

Hardly. SheerVideo compresses title screens as well as any other content, but other codecs specifically designed for poster-quality imagery, such as Apple's Animation codec, are capable of compressing title screens much better.

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SheerVideoIs SheerVideo useful for home videos?

Not very. SheerVideo compresses on average 60% less than DV, in part because SheerVideo does not directly support the Y'CbCr 8b 4:1:1 and 4:2:0 formats used in DV. For most home-video producers, the space savings of using DV would override the time savings and supreme quality offered by SheerVideo. Furthermore, most home-video producers are likely to use free editing software, such as Apple's iMovie, that can only work in DV format.

However, for those with the extra disk space and the more-versatile editing software, SheerVideo compresses nearly 7 times faster than DV for Y'CbCr 8bv 4:2:2, and SheerVideo compresses with perfect fidelity, contrasted with DV's average error rate of 3.75 bits per pixel.

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SheerVideoIs SheerVideo useful for games?

SheerVideo is useful for game production, but not for game distribution. In a published computer game, video quality and speed are not as critical as file size. An approximating codec such as Sorenson or MPEG can compress video to much slimmer size than any perfect-fidelity codec possibly can.

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SheerVideoIs SheerVideo useful for the Web?

No, SheerVideo is not useful for the World Wide Web. Most people's Internet connections are far too slow for real-time perfect-fidelity video. For the Web, the bandwidth criterion completely overrides concerns of quality and coding speed.

On the other hand, if you are fortunate enough to be participating in Internet 2 research, then SheerVideo is very useful.

If you're using SheerVideo for an imaging genre not listed here, we'd love to hear about it. Please drop a note in our Suggestion Box, or e-mail us at suggestionsbitjazz.com

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