Coded anti-piracy

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Coded anti-piracy (CAP) is an anti-copyright infringement technology which marks each film print of a motion picture with a distinguishing pattern of dots, used as a forensic identifier to identify the source of illegal copies.

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They are not to be confused with cue marks, which are black or white circles usually in the upper right-hand corner of the frame. A cue mark is used to signal the projectionist that a particular reel of a film is ending, as most films come to theaters on several reels of celluloid.

CAP code

CAP code on a 35 mm print of My Own Private Idaho (Gus Van Sant, 1991) Coded anti-piracy (CAP) on a 35mm film print.jpg
CAP code on a 35 mm print of My Own Private Idaho (Gus Van Sant, 1991)

CAP coding is a multi-dot pattern that is printed in several frames of a film print of a theatrically exhibited motion picture. It is sometimes accompanied by text code printed on the edge of a motion picture print, outside the visible picture area.

The dots are arranged in a unique pattern as identification of the particular print of a movie, and are added during manufacture. The marks are not present on the original film negative; they are produced either by physical imprint on the final film print or by digitally postprocessing a digitally distributed film. This enables codes to be customized on a per-copy basis so that they can be used to trace the print to the theaters that played that particular print and to trace any bootleg copies however they were made  be they telecined, cammed, or telesynced.

Kodak's CAP

The original style of CAP code, developed in 1982 by Kodak along with the Motion Picture Association, is a series of very small dots printed in the picture area of a film print.

The original instance of CAP developed by Kodak is a technology for watermarking film prints to trace copies of a print, whether legal or not.

Deluxe's CAP

A newer and more common variation has been developed by Deluxe Media. It makes use of more visible dots, and was developed to thwart film copying from theatergoers with camcorders, or prints that have been illicitly telecined to videotape or DVD.

Deluxe's version has been given the pejorative name of "crap code" by filmgoers.[ who? ] The term "crap code" was coined on a movie projectionists' discussion forum, due to its quite intrusive nature when viewing. These dots are usually placed on bright areas of a film frame, so they can be more easily identified, and are a reddish-brown color.

CineFence

A different marking system is CineFence, introduced by Philips in 2006 and commercially available in 2008.

The Digital Cinema System Specification by Digital Cinema Initiatives mandates forensic marking of digital film; [1] CineFence is the first marking system that complies with this standard.

CineFence claims to be imperceptible to the viewer, but robust to copying and encoding, [1] and encodes 35 bits/5 minutes. [2]

See also

Notes

Related Research Articles

<span class="mw-page-title-main">Digital cinema</span> Use of digital projectors in cinemas

Digital cinema refers to the adoption of digital technology within the film industry to distribute or project motion pictures as opposed to the historical use of reels of motion picture film, such as 35 mm film. Whereas film reels have to be shipped to movie theaters, a digital movie can be distributed to cinemas in a number of ways: over the Internet or dedicated satellite links, or by sending hard drives or optical discs such as Blu-ray discs.

<span class="mw-page-title-main">Keykode</span> Barcode-based film markings developed by Eastman Kodak

Keykode is an Eastman Kodak Company advancement on edge numbers, which are letters, numbers and symbols placed at regular intervals along the edge of 35 mm and 16 mm film to allow for frame-by-frame specific identification. It was introduced in 1990.

<span class="mw-page-title-main">Telecine</span> Process for broadcasting content stored on film stock

Telecine is the process of transferring film into video and is performed in a color suite. The term is also used to refer to the equipment used in this post-production process.

Digital Picture Exchange (DPX) is a common file format for digital intermediate and visual effects work and is a SMPTE standard. The file format is most commonly used to represent the density of each colour channel of a scanned negative film in an uncompressed "logarithmic" image where the gamma of the original camera negative is preserved as taken by a film scanner. For this reason, DPX is the worldwide-chosen format for still frames storage in most digital intermediate post-production facilities and film labs. Other common video formats are supported as well, from video to purely digital ones, making DPX a file format suitable for almost any raster digital imaging applications. DPX provides, in fact, a great deal of flexibility in storing colour information, colour spaces and colour planes for exchange between production facilities. Multiple forms of packing and alignment are possible. The DPX specification allows for a wide variety of metadata to further clarify information stored within each file.

Digital intermediate (DI) is a motion picture finishing process which classically involves digitizing a motion picture and manipulating the color and other image characteristics.

<span class="mw-page-title-main">Film recorder</span> Device that copies content from a computer system to film stock

A film recorder is a graphical output device for transferring images to photographic film from a digital source. In a typical film recorder, an image is passed from a host computer to a mechanism to expose film through a variety of methods, historically by direct photography of a high-resolution cathode-ray tube (CRT) display. The exposed film can then be developed using conventional developing techniques, and displayed with a slide or motion picture projector. The use of film recorders predates the current use of digital projectors, which eliminate the time and cost involved in the intermediate step of transferring computer images to film stock, instead directly displaying the image signal from a computer. Motion picture film scanners are the opposite of film recorders, copying content from film stock to a computer system. Film recorders can be thought of as modern versions of Kinescopes.

<span class="mw-page-title-main">Movie projector</span> Device for showing motion picture film

A movie projector is an opto-mechanical device for displaying motion picture film by projecting it onto a screen. Most of the optical and mechanical elements, except for the illumination and sound devices, are present in movie cameras. Modern movie projectors are specially built video projectors.

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<span class="mw-page-title-main">Film leader</span> Head or tail of a film

A film leader is a length of film attached to the head or tail of a film to assist in threading a projector or telecine. A leader attached to the beginning of a reel is sometimes known as a head leader, or simply head, and a leader attached to the end of a reel known as a tail leader or foot leader, or simply tail or foot.

<span class="mw-page-title-main">Workprint</span> Rough version of a motion picture or television program

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<span class="mw-page-title-main">Motion picture film scanner</span> Device that digitises film stock

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<span class="mw-page-title-main">Cue mark</span> Visual indicator on motion picture films

A cue mark, also known as a cue dot, a cue blip, a changeover cue or simply a cue, is a visual indicator used with motion picture film prints, usually placed in the upper right corner of a film frame. Cue dots are also used as a visual form of signalling on television broadcasts.

A release print is a copy of a film that is provided to a movie theater for exhibition.

The term telecine refers both to a film-to-tape transferring machine, as well as the process by which film is transferred to tape. The telecine process is frequently used by filmmakers to transfer production footage to video, which can then be captured by various non-linear digital editing systems.

A color suite is the control room for color grading video in a post-production environment.

<span class="mw-page-title-main">Spirit DataCine</span> Motion picture film scanner

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A Digital Cinema Package (DCP) is a collection of digital files used to store and convey digital cinema (DC) audio, image, and data streams.

A projection booth, projection box or Bio box is a room or enclosure for the machinery required for the display of movies on a reflective screen, located high on the back wall of the presentation space. It is common in a movie theater.

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