Adjust Output; Adjust Function - Sony SS-HQ1 Application Notes

12.7. ADJUST Output

12.7.1. ADJUST Function

The ADJUST function is a function which performs 10-bit digital value sampling immediately after the A/D
converter; performs 9-bit digital value sampling after YC processing (immediately before encoder processing);
and outputs those values through serial communication. This function can be used to digitally measure signal
level characteristics with the camera set in the image pickup state.
As an example application, individual color bar color measurement results can be used in studying dynamic
range during evaluations, and in testing for variations among camera sets on mass production lines.
Operations
The SG block generates a sampling pulse (ADJUST pulse), and sampling is performed in the A/D block and Y/C
block.
In the A/D block, the value immediately following the A/D converter (AJSTOUT) is sampled.
In the Y block, the value immediately preceding the encoder processing block (YOUT) is sampled. In the C
block, the color difference values prior to encoding (R-Y: RYOUT, B-Y: BYOUT) are sampled.
The values of AJSTOUT, YOUT, RYOUT, and BYOUT can be read by transmitting CAT22 (SOUT1) through
serial communication.
Settings
Marker position indicators during camera adjustment signal output are set by setting numerical values for
MSK0HSET and MSK0VSET. When these are set, the indicators are mixed with the Y signal and makers are
displayed on the screen. These set values are the same as the position indicated by the mask 0 starting point
address.
The marker display can be turned ON/OFF by using ADJSTMK and DISPMIX. Note that these markers will not
be displayed unless the individual parameters are set to ON after first setting ADJUST (CAT8_Byte1_bit6) to
1[h].
Also note that the position displayed by the mask 0 starting point address, as well as the marker positions
displayed by ADJSTMK and DISPMIX are different from each other for reasons related to DSP processing.
However, the sampled data will correspond to the respective marker positions.
Parameter
ADJUST
ADJSTMK
DISPMIX
MSK0HSET
MSK0VSET
Table 12.7-1 ADJUST Settings
CAT8_Byte1_bit6
CAT8_Byte2_bit4
CAT8_Byte1_bit7
CAT9_Byte1_bit0-7
CAT9_Byte17_bit0-7
Description
Camera adjustment signal output
AD sampling point indicator
(output to AJSTOUTL/M)
Y, R-Y and B-Y sampling point indicator
(output to YOUTL/M, RYOUTL/M, and BYOUTL/M)
Mask 0 horizontal starting point (4-pixel unit)
/ Sampling horizontal position
Mask 0 vertical starting point (4-pixel unit)
/ Sampling vertical position
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- SS-HQ1 Application Notes -
Ver.1.0.0 January 7, 2005