Matrox-electronic-systems M.Key/100 Manual de usuario descargar pdf (Pagina 19)

Using Matrox M.Key/100 with VFW programs

$ Alternate Sets an alternate zig zag scanning pattern of the AC coefficient

of the DCT block as defined in the ISO/IEC 13818-2 (figure 7-3)

specification documentation. Use this setting when capturing or rendering

video at a high data rate (for example, at a data rate of 100 Mb/sec or higher).

6 Under Rounding Type, select one of the following:

$ MPEG-2 Rounds the AC coefficients up to the nearest whole number

when calculating the quantization coefficient.

$ Matrox Custom Truncates the AC coefficients to the lowest whole

number when calculating the quantization coefficient. In some cases, this

setting may yield less artifacts in graphics.

7 Select the Force Frame-based DCT setting to render macroblocks as

frames rather than as fields. In some cases, graphics will yield less artifacts if

this option is selected.

8 Click OK to save your settings. The settings you selected will be used each

time you render material with your program, until you change the settings

again.

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Matrox-electronic-systems M.Key/100 Manual de usuario Pagina 19