Digital Chromatics Jargon

ProRes

dc_admin — Mon, 07 Apr 2014 17:15:45 +0000

ProRes- A family of lossy intermediate codecs designed by Apple. ProRes reduces storage and bandwidth requirements in postproduction. It supports resolutions from SDTV up to 4K.

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K

dc_admin — Mon, 07 Apr 2014 17:14:30 +0000

K- 1024 pixels of horizontal resolution. The term arose in digital film scanning and is now frequently used to describe 2K, 4K and 8K digital cinema systems.

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Gamma

dc_admin — Mon, 07 Apr 2014 17:13:23 +0000

Gamma- An encoding technique for handling grayscale in video and HDTV systems. For accommodating extreme highlights and shadows, gamma encoding has been surpassed by Sony S-Log 2 logarithmic encoding and RAW recording.

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QFHD

dc_admin — Wed, 02 Apr 2014 17:16:21 +0000

QFHD- Short for Quad Full HD, an image of 3840 x 2160, the resolution used in consumer Ultra HD television systems. This is closely related to the digital cinema 4K standard of 4096 x 2160.

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2K

dc_admin — Sat, 13 Apr 2013 17:10:42 +0000

2K- An image with 2048 pixels horizontal resolution. In the Digital Cinema Initiatives (DCI) standard, an image container of 2048 x 1080. This is closely related to 1080p high definition (1920 x 1080). The Sony F55, F5 and FS700 cameras can output a 2K image without windowing, which means no loss in angle of view versus the 4K image.

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4K

dc_admin — Sat, 23 Mar 2013 00:13:27 +0000

4K – Currently the most popular of the higher resolution in digital cinematography and film. The term 4K refers to the horizontal resolution of these formats, which are all on the order of 4,000 pixels. Historically many aspects of handling 4K have been problematical – not least due to the large data rate (over 1.1 GB/s) and the amount of data produced – about 4 TB/h. However modern technologies applied all the way from scene to screen have now made 4K far more readily accessible. For some time, 4K has been the format of choice for some complex effects shots where it was felt these needed extra quality (over 2K) to still look good after all the necessary processes are completed, specially where the finished shots are inter-cut with the original camera data. Now it is increasingly being used for entire movies.

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4:2:0

dc_admin — Tue, 12 Mar 2013 19:19:36 +0000

4:2:0 - A sampling system used to digitize the luminance and color difference components (Y, R-Y, B-Y) of a video signal. It decreases the overall data by 25 percent against 4:2:2 sampling and the color information has a reasonably even resolution in both the vertical and horizontal directions. 4:2:0 is widely used in MPEG-2 coding meaning that the broadcast and DVD digital video seen at home is usually sampled this way.

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4:2:2

dc_admin — Fri, 08 Mar 2013 19:18:01 +0000

4:2:2 - A ratio of sampling frequencies used to digitize the luminance and color difference components (Y, R-Y, B-Y) of an image signal. The term 4:2:2 denotes that for every four samples of the Y luminance, there are two samples each of R-Y and B-Y, giving less chrominance (color) bandwidth in relation to luminance. This compares with 4:4:4 sampling where full same bandwidth is given to all three channels – in this case usually sampled as RGB.

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4:4:4

dc_admin — Wed, 27 Feb 2013 19:16:36 +0000

4:4:4 - One of the ratios of sampling frequencies used to digitize the luminance and color difference components (Y, B-Y, R-Y) or, more usually, the RGB components of a video signal. In this ratio there is always an equal number of samples of all components. RGB 4:4:4 is commonly used in high-end post including that used for digital cinematography.

In the converged media world, big screen requirements for cinema demand a new high level of picture quality. Film is commonly scanned in RGB for digital intermediate and effects work, and recorded directly to disks. The signal is then kept in the RGB form all the way through the DI process to the film recorder – making the best use of the full RGB data. For the rapidly growing market of digital cinema exhibition the DCI has recommended X ́Y ́Z ́ chromaticity which can be derived from RGB using a 3D LUT.

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8K

dc_admin — Sat, 16 Feb 2013 17:11:13 +0000

8K- An image with 8192 pixels horizontal resolution.

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