\nomenclature{\textbf{Concatenate}}{in File$\rightarrow$Load insertion strategy, means to load from disk or copy from the timeline edits belonging to different media onto the same set of tracks, one right after the other.}
-\nomenclature{\textbf{Compression}}{in \CGG{}’s dialogs means compression format. See Codec.}
+\nomenclature{\textbf{Compression}}{in \CGG{}’s dialogs means compression format. See Codec. In a media video the compression can be Intraframe (within each frame) or it can be about Groups Of Pictures (GOP and Long GOP) between frames, i.e. Interframe. Also, the compression algorithm can be lossy or lossless. Lossy and Interframe are also fine for editing, but for Color Correction, Chroma-Key and Rotoscoping, lossless and Intraframe compression is required.}
\nomenclature{\textbf{Context menu}}{a pop-up menu.}
\nomenclature{\textbf{YUV}}{is a color model which splits luma from chroma, similarly to human sight.. Colors are stored as absolute luma representation and the difference signal between luma and chroma complement components. This color model is used by PAL and NTSC standards. Y stands for the luma component and U and V are the chroma components. U and V are actually color difference components (respectively R-Y and B-Y). In fact YUV signals are created from an original RGB source. The weighted values of R, G, and B are added together to produce a single Y signal, representing the overall luma. The U signal is then created by subtracting the Y from the blue signal of the original RGB, and then scaling; V is created by subtracting the Y from the red, and then scaling by a different factor. Previous black-and-white systems used only luma (Y) information and color information (U and V) was added so that a black-and-white receiver would still be able to display a color picture as a normal black and white picture.}
-\nomenclature{\textbf{8 / 10-bit images}}{images that were sampled at 8 or 10 bits per channel. The tone range for each channel is from 0 to 255 for 8-bit and from 0 to 1023 for 10-bit.}
+\nomenclature{\textbf{8 / 10-bit images}}{images that were quantizated at 8 or 10 bits per channel. The tone range for each channel is from 0 to 255 for 8-bit and from 0 to 1023 for 10-bit.}
\nomenclature{\textbf{Algorithm}}{set of instructions, typically to solve a class of problems or perform a computation.}
\nomenclature{\textbf{DeSpill}}{process to remove background color contamination from the edges of the subject in foreground, during a chroma key.}
-\nomenclature{\textbf{Digital Intermediate (DI)}}{Over time it has taken on different meanings. For \CGG{} is meant as the creation of a high quality file that during the various stages of editing and color correction keeps as much information as possible. Being little or uncompressed its manipulation is also faster and more efficient.}
-
\nomenclature{\textbf{Dynamic range}}{is the ratio between the largest and smallest values (luminance) that an image can assume. The larger the size, the better we can distinguish details in the dark and light parts.}
\nomenclature{\textbf{Exposure}}{the exposure is the amount of light per unit area reaching an image sensor, as determined by shutter speed, lens aperture and scene luminance.}
\nomenclature{\textbf{Gamut}}{In color reproduction, the gamut is a certain complete subset of colors. The larger the gamut of a device (associated with a color space) the more colors can be displayed.}
-\nomenclature{\textbf{HDR images}}{are images that have a dynamic range larger than that of the sensor used. They are created directly with a rendering or with the merge of several images at low dynamic range. They require the use of floating points.}
-
\nomenclature{\textbf{HDTV}}{(high definition TV) standard characterized by a 16:9 aspect ratio, various frames rates and scan modes and with a resolution of at least 1080.}
+\nomenclature{\textbf{Intermediate}}{The production process of a movie in which you switch from film to a digital intermediate for the various stages of processing and then return to the film. (ADA = Analog, Digital, Analog). The most used formats are Cineon/DPX and OpenEXR. We also talk about DI= Digital Intermediate. Nowadays it is often used as a synonym for Mezzanine codec (see).}
+
\nomenclature{\textbf{Lanczos}}{algorithm for high quality resampling video signal. It is also used in case of upsampling, weak point of other similar filters.}
\nomenclature{\textbf{Letterbox}}{blacks bars on the top and bottom side of the frame. They are due to a smaller frame size than the one set in the project (see also Pillarbox).}
\nomenclature{\textbf{LUT, 3D LUT}}{(LookUp Table) used to map one color space to another. \CGG{} uses them through ffmpeg filters. There are downloadable collections or there are specific ones provided by hardware manufacturers.}
+\nomenclature{\textbf{Mezzanine codec}}{Transcode digital footage files into a high quality codec that is more efficient on the timeline and retains all initial information (is a DDD process, i.e. Digital, Digital, Digital). Generally such codecs are little or nothing compressed; if compressed they are lossless and intraframe and the chrominance is not less than 4:2:2. Very used codecs are DNxHD; ProRes; ffv1; HuffYUV; etc.}
+
\nomenclature{\textbf{Nearest neighbor}}{is the simplest method of resampling an image. It is fast and resources saving, but produces less smooth results.}
\nomenclature{\textbf{Panning}}{in video technology, panning refers to the horizontal scrolling of an image wider than the display. In \CGG{} it is done (together with other camera movements) with the camera tool.}
projects / goodguy / cin-manual-latex.git / blobdiff