Attribute List
From NI 5431 Composite Video Generator
NI 5431 Composite Video Generator
Attribute List
The following table lists and describes the LabVIEW attributes and their default values based on the standard video type.
Attribute List
| Attribute Name | Value | Description | Unit | Default Value |
|---|---|---|---|---|
| SYNC_AMPLITUDE (IRE) | double* | Level of the synchronization pulses. The sync level is negative. A positive value is inverted by the software. | IRE | NTSC: -40 SECAM: –40 Std PAL: –43 M-PAL: –40 N-PAL: –40 Comb N-PAL: –43 |
| ZERO_LEVEL (IRE) | double* | Level of zero or blanking. | IRE | 0 |
| SETUP_LEVEL (IRE) | double* | Level of black. The value indicates the setup level, that is the difference between blanking and black. | IRE | NTSC: 7.5 Std PAL: 0.0 SECAM: 0.0 M-PAL: 7.5 N-PAL: 7.5 Comb N-PAL: 0 |
| WHITE_LEVEL (IRE) | double* | Level of white. | IRE | 100.00 |
| SAMPLING_FREQUENCY (Hz) | double* | Sampling frequency of the generator. | Hz | NTSC: 20.013986 M-PAL: 20.013986 others:20.000000 |
| SAMPLES_PER_LINE | int | Number of samples in a video line. | sample | NTSC: 1272 M-PAL: 1272 others:1280 |
| REFERENCE_LINE | int | Number of the line that starts at the vertical sync edge. | line | NTSC: 4 M-PAL: 4 others: 1 |
| SYNC_DURATION (US) | double* | Duration of the HSync pulse. | µs | 4.74. |
| SYNC_START (US) | double* | Where the falling edge of sync signal reach 50% of the sync level. | µs | 0.00 |
| SYNC_RISETIME (US) | double* | Time between 10–90% of the sync level. | µs | 0.2 |
| BURST_DURATION (US) | double* | Duration of the color burst. | µs | Std PAL: 2.25 SECAM: 2.25 N-PAL: 2.25 others: 2.5 |
| BURST_START (US) | double* | Where the amplitude of the color burst signal reach 50% of BURST_AMPLITUDE. | µs | NTSC : 5.3 N-PAL: 5.8 others: 5.6 |
| BURST_RISETIME (US) | double* | 10–90% rise time of the color burst signal. | µs | 0.2 |
| BURST_AMPLITUDE (IRE) | double* | Amplitude of the color burst. | IRE | NTSC: 20.0 others: 21.4 |
| SUBCARRIER_PERIODS_ PER_LINE | double* | Number of periods of the chroma subcarrier in a video line. | periods | NTSC: 227.5000 Std PAL: 283.7516 M-PAL: 227.2500 CombN-PAL: 229.2516 (not applicable for SECAM) |
| SUBCARRIER_START_PHASE (DEG) | double* | Color modulation start phase. | degrees | 0.00 |
| SUBCARRIER_SECOND_ HARMONIC (%) | double* | Color modulation second harmonic distortion. | % | 0.00 (not applicable for SECAM) |
| SUBCARRIER_THIRD_ HARMONIC (%) | double* | Color modulation third harmonic distortion. | % | 0.00 |
| BRIGHTNESS (IRE) | double* | Brightness value added the Y signal. | IRE | 0.00 |
| CONTRAST | double* | Contrast factor. | none | 1.00 |
| SATURATION | double* | Saturation factor. | none | 1.00 |
| TINT(DEG) | double* | Hue offset angle (NSTC only). | degree | 0.00 |
| GAMMA | double* | Gamma correction factor. | none | 1.00 |
| IMAGE_INTERLACED | int | Is the image interlaced. | no/yes | 1 (yes) |
| IMAGE_TOP (LINES) | int | Line number where the image starts in the video frame. | line | NTSC: 22 M-PAL: 22 others: 21 |
| IMAGE_HEIGHT (LINES) | int | Number of line of the image to be used. | line | NTSC: 480 M-PAL: 480 others: 576 |
| IMAGE_X_START (US) | double* | Specify the time from the beginning of each line where the active image starts. | µs | Std PAL: 10.5 SECAM: 10.5 CombN-PAL: 10.5 others: 9.5 |
| IMAGE_DURATION (US) | double* | Specify the duration of the active image on each line. | µs | NTSC: 52.2 M-PAL: 52.2 N-PAL: 53.0 others: 52.0 |
| IMAGE_WIDTH (PIXELS) | int | Number of line pixels of the image to be used. | pixel | NTSC: 640 M-PAL: 640 others: 768 |
| INPUT_GAIN | double* | Used only with 16-bit pixels as input data. | none | 100 IRE/65535 lsb = 1.5259–3 |
| INPUT_OFFSET | double* | Used only with 16-bit pixels as input data. | none | 0 |
| OUTPUT_GAIN | double* | Used only with 16-bit pixels as output data. | none | 25000 lsb/100 IRE = 250 |
| OUTPUT_OFFSET | double* | Used only with 16-bit pixels as output data. | none | –4000 lsb |
| NOISE _LEVEL (IRE RMS) | double* | Level of white noise to be added to the generated signal. | IRE rms | 0.00 |
| DIGITAL_DELAY (PIXELS) | int | Delay between the analog sync and the digital sync signals. | samples | 28 |
| FIELD_POLARITY | int | Field digital signal polarity. | Logical | 0 (negative) |
| Y_FILTER | int | Lowpass filter used for the Y component. | filter1 | none |
| UV_FILTER | int | Lowpass filter used for the U and V components. | filter1 | 1.3 MHz IIR |
| I_FILTER | int | Lowpass filter used for the I component. | filter1 | 1.3 MHz IIR |
| Q_FILTER | int | Lowpass filter used for the Q component. | filter1 | 0.4 MHz IIR |
| C_FILTER | int | Lowpass filter used for the C component. | filter1 | none |
| COMPOSITE_FILTER | int | Lowpass filter used for the composite signal. | filter1 | none |
| SECAM_BOTTLE_SHAPE_ SIGNAL | int | Enables the bottle shape signals (SECAM only) | Disable/ Enabled | 1 (enabled) |
| U or Q Gain | Double* | Gain applied to the U or the Q signal | none | 1.00 |
| V or I Gain | Double* | Gain applied to the V or the I signal | none | 1.00 |
The following figure shows the relationship between the sync and burst timings and the attribute name. For example, the number 3 is specified by the attribute Sync Duration (us).
| 1 | White Level (IRE) | 2 | Sync Start (us) |
| 3 | Sync Duration (us) | 4 | Burst Start 9 (us) |
| 5 | Image X Start (us) | 6 | Setup Level (IRE) |
| 7 | Burst Amplitude (IRE) | 8 | Zero Level (IRE) |
| 9 | Burst Duration (us) | 10 | Sync Amplitude (IRE) |
| 11 | Sync Rise Time (us) | 12 | Burst Rise Time (us) |