ADLINK Technology PCI-MPG24 Manuel d'utilisateur télécharger pdf (Page 87)

Reference Manual 77

v_sub_offset

If v_sub_window is performed, this parameter specifies a rela-

tive offset between the topmost pixel of the output stream and

the topmost pixel of the source stream, in pixels.

h_scale_enb

Specify if it will perform ½ scaling in the horizontal direction.

X 0: Disable scaling

X 1: Enable scaling

v_scale_enb

Specify if it will perform ½ scaling in the vertical direction.

X 0: Disable scaling

X 1: Enable scaling

sub_sample

Specify if it is performing sub_sampling. Sub-sampling will per-

form ½ scaling down to the stream in both horizontal and verti-

cal directions.

X 0: Disable sub_sampling

X 1: Enable sub_sampling

max_bitrate

The maximum bit rate allowed for this resolution.

Note:

Sub-sampling, sub-windowing, and scaling are three

different methods provided by the chip to reduce the

source stream size, and performed in the sequence

above. If sub-sampling and sub-windowing are both

enabled, the sub-offset for sub-window will be relative

to the leftmost pixel of the stream AFTER sub-sam-

pling is performed.

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ADLINK Technology PCI-MPG24 Manuel d'utilisateur Page 87