Matrox Electronic Systems Matrox RT.X2 User Manual download pdf (Page 206)

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Appendix D, Matrox RT.X2 Glossary

of time code can be read only while the tape is

moving. See also VITC.

luma key An effect that makes portions of

a foreground image fully or partially

transparent based on the luminance of that

image, so that an underlying image can show

through. See also alpha key and chroma

key.

luminance The brightness portion of a

video signal. The luminance of a pixel

determines its brightness on a scale from

black to white. See also chrominance.

luminance key See luma key.

M

mark in To select the first frame of a clip.

mark out To select the last frame of a clip.

mask effect A Matrox effect that lets you

apply a mask (cutout shape) to a clip to

superimpose it onto another clip.

mask blur effect A Matrox effect that lets

you create a “region of interest” by adding a

mask to your clip and applying blurring to it.

mask mosaic effect A Matrox effect that

lets you create a “region of interest” by

adding a mask to your clip and applying a

mosaic effect to it.

MIP mapping In 3D graphics, a rendering

technique where a texture is stored at multiple

resolutions. See also texture mapping.

M-JPEG See Motion-JPEG.

mosaic effect An effect that “blurs” an

image by copying pixels into adjacent pixels

both horizontally and vertically. This gives

the image a blocky appearance, often used to

hide people’s identities on television.

move & scale effect A Matrox effect that

lets you

position and scale your clips

anywhere in 2D space while adding soft

edges

. See also DVE.

Motion-JPEG A compression and storage

standard used for motion video. The JPEG

compression process is applied to each video

field, in succession. Also called M-JPEG.

MP@ML Main Profile@Main Level. An

MPEG-2 video compression profile that

supports 4:2:0 luminance/chrominance

sampling at up to 720×576 pixel resolution,

and data transfer rates up to 15 Mb/sec (1.79

MB/sec). This profile is used for broadcast

transmission and distribution on DVD. See

also 4:2:2P@ML.

MPEG A video compression standard that

specifies a series of compression profiles and

image resolution levels, introduced in 1990 by

the Motion Picture Experts Group. MPEG

takes advantage of the redundancy inherent in

video data through a combination of inter-

frame and intra-frame redundancy reduction.

The MPEG standard supports data transfer

rates of up to 1.5 Mb/sec (0.2 MB/sec). Also

called MPEG-1. See also MPEG-2, inter-

frame (IBP) compression, and intra-frame (I-

frame) compression.

MPEG-1 See MPEG.

MPEG-2 A video compression standard

that improves upon the MPEG standard by

supporting data rates of up to 100 Mb/sec (12

MB/sec), scalable modes, field or frame

searching, and much larger screen sizes. See

also intra-frame (I-frame) compression, inter-

frame (IBP) compression, 4:2:2P@ML, and

MP@ML.

MPEG-2 IBP An MPEG-2 compression

type that uses inter-frame compression to

create a group of I, B, and P-frames. Used for

broadcast transmissions and distribution on

DVD. See also GOP.

MPEG-2 I-frame An MPEG-2

compression type that uses only intra-frame

compression (that is, only I-frames are

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