- SS-HQ1 Application Notes -
Ver.1.0.0 January 7, 2005
246
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.
Table 12.7-1 ADJUST Settings
Parameter
Description
ADJUST CAT8_Byte1_bit6 Camera adjustment signal output
ADJSTMK CAT8_Byte2_bit4
AD sampling point indicator
(output to AJSTOUTL/M)
DISPMIX CAT8_Byte1_bit7
Y, R-Y and B-Y sampling point indicator
(output to YOUTL/M, RYOUTL/M, and BYOUTL/M)
MSK0HSET CAT9_Byte1_bit0-7
Mask 0 horizontal starting point (4-pixel unit)
/ Sampling horizontal position
MSK0VSET CAT9_Byte17_bit0-7
Mask 0 vertical starting point (4-pixel unit)
/ Sampling vertical position