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) |