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Dot crawl (also known as chroma crawl or cross-luma) [1] [2] is a visual defect of color analog video standards when signals are transmitted as composite video, as in terrestrial broadcast television. It consists of moving checkerboard patterns which appear along horizontal color transitions (vertical edges).
User's guide for a Dulcitone keyboard. A user guide, also commonly known as a user manual, is intended to assist users in using a particular product, service or application. It is usually written by a technician, product developer, or a company's customer service staff. Most user guides contain both a written guide and associated images.
The main microprocessor in the Chroma and Expander is a 68B09, and it has a computer interface consisting of a 25-pin D-sub connector. The factory original Chroma CPU board has 2 AA batteries to preserve memory while the power is off. Many Chroma CPU boards have been damaged from battery leakage.
The subsampling scheme is commonly expressed as a three-part ratio J:a:b (e.g. 4:2:2) or four parts, if alpha channel is present (e.g. 4:2:2:4), that describe the number of luminance and chrominance samples in a conceptual region that is J pixels wide and 2 pixels high. The parts are (in their respective order):
Luminance only, Chrominance only, and full color image. Chrominance (chroma or C for short) is the signal used in video systems to convey the color information of the picture (see YUV color model), separately from the accompanying luma signal (or Y' for short).
Luma alone does not perfectly represent luminance; accurate luminance requires both accurate luma and chroma. Hence, errors in chroma "bleed" into the luminance of an image. Note the bleeding in lightness near the borders. Due to the widespread usage of chroma subsampling, errors in chroma typically occur when it is lowered in resolution ...
Chroma, a canceled 2014 video game by Harmonix; Chroma and Chroma Prime, playable characters from Warframe Warframe; Chroma, a fictional city in the video game De Blob; Chroma, a fictional supernatural force in the video game Fahrenheit; Chroma, a profession in the video game Phantom Brave
The resulting time-chroma representation is also referred to as chromagram. The figure above shows chromagrams for a C-major scale, once obtained from a musical score and once from an audio recording. Because of the close relation between the terms chroma and pitch class, chroma features are also referred to as pitch class profiles.