TerraTec Cameo Convert, Руководство пользователя

Страница: 26 / 27

26 CameoConvert (English)
NTSC – NTSC is the video standard used in the USA and Japan. NTSC has a higher frame rate
than PAL (30 frames or 60 -> fields per second), but a lower resolution (525 rows, with 480
visible). Color depiction in NTSC is realized in -> YIQ.
PAL – This is the most common video standard in Europe. PAL displays 25 frames (or 50 ->
fields) per second and has a resolution of 625 rows, of which 576 are visible. Color depiction
in PAL is realized in -> YUV.
Preview –The preview offers you a quick overview of your work. The final quality is normally
considerably higher than that of the preview.
RAM – Random Access Memory is the main memory of your PC. Since video editing with ef-
fects is very memory-intensive, the old rule applies: you can never have enough RAM!
Rendering – this refers to the processing of video or audio clips after an editing operation has
been completed, for example after the application of an effect or filter.
RGB color space – In the RGB color space, each visible pixel is made up of the three compo-
nents R(ed), G(reen) and B(lue). To achieve the natural display of colors on a computer, each
of these components must have at least 256 values. This corresponds to exactly one byte for
each color component. A single complete video image would thus require 768 pixels x 576
pixels x 3 bytes = 1,327,104 bytes. This corresponds to around 1.2 MB per frame! One second
of video in the RGB color space would therefore require around 31.6 MB of storage space.
Using this process, a 2 GB hard drive would have a video capacity of around one minute. No
current hard drive can deliver this volume of data in real time, but a number of options are
available to reduce the data volume of the video signal substantially through transformation
to a different color space (usually YUV) and compression (usually MJPEG).
S video – Unlike -> composite video, chrominance and luminance are transmitted separately
in S video, resulting in higher quality.
Saturation – Describes the share of color in the picture.
SECAM – The English drive on the left, the French use SECAM. SECAM is the third video stan-
dard after PAL and NTSC. Today it is only in use in France and a number of Eastern countries.
East Germany, for example, also once used the SECAM standard.
Storyboard – Unlike the -> timeline, the storyboard offers a thematic overview of your video
project. Individual scenes can be identified easily, but it does not deliver a sense of the actual
length of the project.
SVCD – Abbreviation for Super Video CD. SVCDs are similar to -> VCDs, but they have a great
advantage in that their data is in MPEG-2 format with a -> variable bit rate. In addition, the
resolution of 480 X 576 pixels is higher than that of the VCD. An SVCD generally can contain