Digital video, video [DV – Digit Video, video]
1. The term used in relation to the systems and tools to create, store, transform, transmit and / or receive (including reproduction) of moving images using computer technology. Digital video is characterized by the following basic parameters: frame rate [frame rate] (measured by the number of interchangeable image frames on the screen per second), screen resolution [spatial resolution] (measured by the number of pixels in an image frame), color depth or color resolution [color resolution] (measured by the number of transmitted color tones), and image quality [image quality] – a complex indicator, including the above. One type of digital video is computer animation.
2. Video presentation format used for recording and data exchange between digital video cameras, VCR and PC. Also called DV editing [DV-the format]. For DV transmission, the IEEE-1394 standard (FireWire or i.LINK) is used. Provides 5: 1 video signal compression ratio, 3.6MB / s signal transmission rate, video frame resolution for PAL – 720×576 and NTSC – 720×480, support for recording and reproduce sound in 4 channels with a sampling frequency of 32 kHz and a bit depth of 12 (or in 2 channels with a sampling frequency of 48 kHz and a bit depth of 16 bits). See [556] for more details.
DV Type-1 (Digital Video Type-1): A variant of the DV format presentation (see above), incompatible with Video for Windows and compatible only with later versions of DirectShow. A file in this format has video and audio components of the recording, which are interleaved (stereo, 48 kHz, 16-bit). This format is the recommended format for processing DV video on a PC [556].
DV Type-2 (Digital Video Type-2) – The original (legacy) version of the DV format on a PC, backward compatible with Video for Windows – Programs running on Video for Windows can only read one file Type -2. In this case, to save data in it, you need to use a special codec. Compared to Type -1, it is more expensive to decode and mix [556].
S-Video is an image format in which chroma and luminance are separated into two separate signals, resulting in higher image quality (see also “stereo video” above).
Component Video [Component Video]: Color video transmitted using three separate channels using one of the color separation models: RGB, YiQ, or YUV.
Intel DVI (Intel Digital Video Interface), Intel Real-time Video – DVI is a hardware / software suite that includes a DVI chipset, an executable software interface, data compression and decompression schemes, and data file formats. DVI format was created in 1984 in Princeton, New Jersey by employees of the USA company the RCA Corporation. Then it changed ownership and from 1988 became the property of Intel Corp., which supports its development. Currently, DVI is a multimedia format for storing audio and video data. Its main features: Supports 16 million colors; it has a maximum resolution of 256×240 pixels; uses its own compression machine and JPEG (5: 4 motion picture compression ratio); it also provides still image storage and compression (lossy and lossless); has a specification on CD-ROM. Audio compression is done using ADPCM and PCM 8. For more information, see [584].
RIFF (Resource, Interchange, File, Format) – “File Format Resource Sharing” from Microsoft is a complex multimedia format used for Windows * *, Windows NT, and OS / 2 operating systems. Its purpose: to adapt various types of data for multimedia programs. The type of data contained in the RIFF file is indicated by the extension: embedded audiovisual data – * .avi; audio data (“wave”) – * .wav; raster data – * .rdi; MIDI data – * .rmi; lots of other RIFF- * .bnd files … Since there are many different multimedia files under the general name RIFF, each of them is processed taking into account the type of data it contains. For example, a RIFF file that contains audiovisual data is often referred to and treated as an AVI file in general and not as a RIFF file. RIFF files are often mistakenly believed to be similar to TIFF (Tag Image File Format) files. Although these formats use the same storage concept, they are incompatible. For more details, see [584].
QT (QuickTime), QTM (QuickTime Movie Resourse Format)
