HELIOS SERIES USER MANUAL
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7-1-4 BT.656
7-1-5 CDS_2
7-1-3 BT.1120
BT.656 digital video consists of one clock signal and eight data signals
(DV0~DV7).
BT.656 digital video supports all the functions, which include brightness/contrast
adjustment, polarity selection, palette selection, reticle controlling, digital zoom
and video mirror. And the data source of BT.656 shall be the data after image
processing (DRC).
CDS_2 digital video consists of a clock signal (Clock), a frame valid signal
(Vsync), a line valid signal (Hsync), and 16-bits data signals (DATA).
The digital video includes two parts. The first part is image data, in YUV422
format, the higher 8 bits data defines luminance, the lower 8 bits data defines
chrominance, supporting color palette mapping; the followed part is temperature
data, only 14 bits are valid bits, write ‘0’ to the highest 2 bits.
There are two kinds of sync for CDS_2: external sync and internal sync. The data
is synchronized by Vsync signals and Hsync signals for external sync. The data
is synchronized by adding sync codes for internal sync.
See next 2 pages.
BT.1120 digital video outputs signals line by line. It includes clock signals (Clock),
line valid signal (Line_Valid), frame valid signal (Frame_Valid), and 16 data signals
(DV0 - DV15). As shown:
When BT.1120 digital video is selected, the functions like digital zoom, menu
display are not supported.
