Tektronix TG8000 User Manual

HDLG7 HD Dual Link Video Generator module
To select the Converter
mode on the HDLG7
module
Select from the
following converter modes when you want to convert the SMPTE
292M 4:2:2 serial digital signal a pplied to the HD SDI I N c onnector into a dual
link output format:
60, 59.94, or 50 Hz Progressive Formats. The HDLG7 module converts the input
interlace signal (60i, 59.94i, or 50i) to a progressive signal by doubling the frame
rate. The in
put signal is copied to both Link A and Link B, but the payload
identifier is modified to indicate a dual-link signal. The results are a 4:2:2 YCbCr
10-bit s ignal at the faster progressive rate (60p, 59.94p, or 50p).
4:4:4 YCbCr Formats. The HDLG7 module converts the input 4:2:2 YCbCr signal
to 4:4:4 Y
CbCr signal by up-interpolating the chroma channel data samples.
This is a ccomplished by using several incoming data samples before and after
the data s amples to derive the extra sample point. If 10-bit sample s tructure is
selected, the alpha channel is set to blanking levels or is controlled by the ALPHA
CHANNEL DATA menu. If 12 bit is chosen, the addition 2 LSB bits are set to
zero on the Y and co-sited Cb and Cr samples. The de rived Cb and Cr sa mples
will co
ntain derived LSB bits.
4:4:4 RGB Formats. The HDLG7 module converts the input 4:2:2 YCbCr signal
to 4:4:4 YCbCr as described above. Then the signal is color-space converted
using the inverse linear transform defined in SMPTE 274M. If 10-bit sample
structure is selected, the alpha channel is s et to blanking levels or is controlled
by th
e ALPHA CHANNEL DATA menu. If 12 bit is chosen, the addition 2 bits
(LSB) are computed from the linear transform calculations.
4:2:2 YCbCr 12 Bit Formats. The HDLG7 module converts the input 4:2:2 YCbCr
signal to 4:2:2 YCbCr 12 bits by setting zeros for the additional 2 bits (LSB). The
alpha channel is set to blanking levels or is controlled by the ALPHA CHANNEL
D
ATA m enu.
4:4:4 XYZ Formats. The HDLG7 module converts the input 4:2:2 YCbCr signal
to 4:4:4 YCbCr and 4:4:4 RGB as described in the preceding paragraphs. Then
the RGB signal is converted to XYZ by normalizing the gamma corrected RGB
signal and applying the results to a RGB to XYZ color-space converter. The
output of the converter is gamma corrected for digital cinema. The XYZ mode
can be selected only in the 2K format mode.
TG8000 Multiformat Test Signal Generator User Manual 3–221

Tektronix TG8000 Specifications

General

Brand	Tektronix
Model	TG8000
Category	Portable Generator
Language	English