User`s manual

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.