Supported Video Signal Info Reports
- Updated2023-08-17
- 7 minute(s) read
Supported Video Signal Info Reports
You can select one or more signal groups, infoframes, or packets in Video Signal Info for NI VMS to measure and report. By default, no Video Signal Info reports are selected.
NI VMS supports the following Video Signal Info reports:
- Audio Infoframe
- HDMI Infoframe
- AVI Infoframe
- SPD Infoframe
- MPEG Infoframe
- General Parameters
- General Timing
- Backward Compatible
Audio Infoframe
The audio infoframe describes characteristics of the active audio stream.
The byte layout of the audio infoframe is specified in the following two tables.
The audio infoframe packet header:
| Byte No | Definition (Value) |
|---|---|
| HB0 | Packet Type (0x84) |
| HB1 | Version (0x01) |
| HB2 | Length (0x0A) |
The audio infoframe packet contents:
| Byte No | Definition (Value) |
|---|---|
| PB1 | <Coding Type:4> | 0 | <Channel Count:3> |
| PB2 | 0 | 0 | 0 | <Sample Frequency:3> | <Sample Size:2> |
| PB3 | <Format:8> |
| PB4 | <Channel Allocation:8> |
| PB5 | Downmix Inhibit | <Level Shift value:4> | 0 | <Playback level:2> |
| PB6 | 0 |
| PB7 | 0 |
| PB8 | 0 |
| PB9 | 0 |
| PB10 | 0 |
| PB11-27 | 0 |
The content of the audio infoframe can be reported as low level results or high level results, selected by a switch.
Low level reporting consists of one result line for each byte in the infoframe in the order specified in the two tables above.
High level reporting consists of the results specified in the table below:
| Measurement Parameter | Definition | Range |
|---|---|---|
| Coding Type | Coding Type | 0-15 |
| Channel Count | Channel Count | 0-7 |
| Sample Frequency | Sample Frequency | 0-7 |
| Sample Size | Sample Size | 0-7 |
| Format | Format | 0-255 |
| Channel Allocation | Channel Allocation | 0-255 |
| Downmix Inhibit | Downmix Inhibit | 0-1 |
| Level Shift Value | Level Shift Value | 0-15 |
| Playback Level | Playback Level | 0-7 |
HDMI Infoframe
The HDMI Infoframe is a CEA-861 vendor-specific Infoframe containing a 24-bit IEEE Registration Identifier of 0x000C03, and describes the HDMI video that is formatted and transmitted.
The byte layout of the HDMI infoframe is specified in the following two tables.
The HDMI infoframe packet header:
| Byte No | Definition (Value) |
|---|---|
| HB0 | Packet Type (0x81) |
| HB1 | Version (0x01) |
| HB2 | Length (max 31) |
The HDMI infoframe packet contents:
| Byte No | Definition (Value) |
|---|---|
| PB1 | ID#1 (24 bit 0x000C03) ID#2 |
| PB2 | ID#2 |
| PB3 | ID#3 |
| PB4 | HDMI Video Format | 0 | 0 | 0 | 0 | 0 |
| PB5 | HDMI VIC or 3d Structure or empty |
| PB6 | <3D Ext Data> or <empty> |
| PB7-Length | (0) |
The content of the HDMI infoframe can be reported as low level results or high level results, selected by a switch.
Low level reporting consists of one result line for each byte in the infoframe in the order specified in the two tables above.
High level reporting consists of the results specified in the table below:
| Measurement | Definition | Range |
|---|---|---|
| Registration ID | 24 bit registration id | |
| HDMI VIC Present | HDMI VIC Present? | 0-1 |
| 3D Structure Present | 3D Structure Present? | 0-1 |
| 3D Ext Data Present | 3D Ext Data Present? | 0-1 |
| HDMI VIC | HDMI VIC | 0-255 |
| 3D Structure | 3D Structure | 0-255 |
| 3D Ext Data | 3D Ext Data | 0-1 |
AVI Infoframe
The bytestring representation of the AVI Infoframe is expected to conform to AVI Infoframe Version 2 specified in standard CEA-861 E, page 36:
The byte layout of the AVI Infoframe is specified in the following two tables.
The AVI infoframe packet header:
| Byte No | Definition (Value) |
|---|---|
| HB0 | Packet Type (0x82) |
| HB1 | Version (0x02) |
| HB2 | Length (0x0D) |
The AVI infoframe packet contents:
| Byte No | Definition (Value) |
|---|---|
| PB1 | 0 | Y1 | Y0 | A0 | B1 | B0 | S1 | S0 |
| PB2 | C1 | C0 | M1 | M0 | R3-0 |
| PB3 | ITC | EC2-0 | Q1 | Q0 | SC1 | SC0 |
| PB4 | F47 | VIC6-0 |
| PB5 | YQ1 | YQ0 |CN1 |CN0 | PR3-0 |
| PB6 | Line Number of End of Top Bar (lower 8 bits) |
| PB7 | Line Number of End of Top Bar (upper 8 bits) |
| PB8 | Line Number of Start of Bottom Bar (lower 8 bits) |
| PB9 | Line Number of Start of Bottom Bar (upper 8 bits) |
| PB10 | Pixel Number of End of Left Bar (lower 8 bits) |
| PB11 | Pixel Number of End of Left Bar (upper 8 bits) |
| PB12 | Pixel Number of End of Right Bar (lower 8 bits) |
| PB13 | Pixel Number of End of Right Bar (upper 8 bits) |
The content of the AVI infoframe can be reported as low level results or high level results, selected by a switch.
Low level reporting consists of one result line for each byte in the infoframe in the order specified in the two tables above.
High level reporting consists of the results specified in the table below:
| Measurement | Definition | Range |
|---|---|---|
| Color Format | RGB or YCbCr indicator | 0-3 |
| Active Format Data Valid | Active Format Aspect Ratio valid? | 0-1 |
| Bar Data | Bar Info data valid? | 0-3 |
| Scan Information | Scan Information. See CEA-861-D for details | 0-255 |
| Coded Frame Aspect Ratio | Coded Frame Aspect Ratio | 0-255 |
| Colorimetry | 0-255 | |
| Active Portion Aspect Ratio | Active Format Aspect Ratio | 0-255 |
| IT Content Valid | IT Content Valid | 0-1 |
| Extended Colorimetry | Extended Colorimetry | 0-7 |
| Active Portion Aspect Ratio | Active Portion Aspect Ratio | 0-255 |
| RGB Quantization Range | Quantization range | 0-3 |
| Non-Uniform Picture Scaling | Non-Uniform Picture Scaling | 0-3 |
| VIC | Video Format Identification code | 0-127 |
| Pixel repetition Field | Pixel repetition factor | 0-15 |
| Photo Content | Photo Content | 0-3 |
| YCC Quantization Range | YCC Quantization Range | 0-3 |
| End Of Top Bar | Line number of End of Top Bar | 0-65535 |
| Start Of Bottom Bar | Line number of Start of Bottom Bar | 0-65535 |
| End Of Left Bar | Line number of End of Left Bar | 0-65535 |
| Start Of Right Bar | Line Number of Start of Right bar | 0-65535 |
SPD Infoframe
The bytestring representation of the SPD Infoframe is expected to conform to SPD Infoframe Version 1 specified in standard CEA-861 E, page 45:
The byte layout of the SPD Infoframe is specified in the following two tables.
The SPD infoframe packet header:
| Byte No | Definition (Value) |
|---|---|
| HB0 | Packet Type (0x83) |
| HB1 | Version (0x01) |
| HB2 | Length (0x019) |
The SPD infoframe packet contents:
| Byte No | Definition (Value) |
|---|---|
| PB1-8 | Vendor name (8 characters) |
| PB9-24 | Product Specification (16 characters) |
| PB25 | Source Information |
The content of the SPD infoframe can be reported as low level results or high level results, selected by a switch.
Low level reporting consists of one result line for each byte in the infoframe in the order specified in the two tables above.
High level reporting consists of the results specified in the table below:
| Byte No | Definition (Value) |
|---|---|
| HB0 | Packet Type = 0x83 |
| HB1 | Version = 0x01 |
| HB2 | Length = 0x019 |
| PB0 | Vendor name Character 1 |
| PB1 | Vendor name Character 2 |
| PB2 | Vendor name Character 3 |
| PB3 | Vendor name Character 4 |
| PB4 | Vendor name Character 5 |
| PB5 | Vendor name Character 6 |
| PB6 | Vendor name Character 7 |
| PB7 | Vendor name Character 8 |
| PB8 | Product Description Character 1 |
| PB9 | Product Description Character 2 |
| PB10 | Product Description Character 3 |
| PB11 | Product Description Character 4 |
| PB12 | Product Description Character 5 |
| PB13 | Product Description Character 6 |
| PB14 | Product Description Character 7 |
| PB15 | Product Description Character 8 |
| PB16 | Product Description Character 9 |
| PB17 | Product Description Character 10 |
| PB18 | Product Description Character 11 |
| PB19 | Product Description Character 12 |
| PB20 | Product Description Character 13 |
| PB21 | Product Description Character 14 |
| PB22 | Product Description Character 15 |
| PB23 | Product Description Character 16 |
| PB24 | Source Information |
MPEG Infoframe
The bytestring representation of the SPD Infoframe is expected to conform to SPD Infoframe Version 1 specified in standard CEA-861 E, page 45:
The byte layout of the MPEG Infoframe is specified in the following two tables.
The MPEG infoframe packet header:
| Byte No | Definition (Value) |
|---|---|
| HB0 | Packet Type (0x85) |
| HB1 | Version (0x01) |
| HB2 | Length (0x0A) |
The MPEG infoframe packet contents:
| Byte No | Definition (Value) |
|---|---|
| PB0 | MB#0 |
| PB1 | MB#1 |
| PB2 | MB#2 |
| PB3 | MB#3 |
| PB4 | 0 | 0 | 0 | FR0 | 0 | 0 | VIC6-0 |
| PB5 | YQ1 | YQ0 |CN1 |CN0 | MF11 | MF0 |
| PB6 | 0 |
| PB7 | 0 |
| PB8 | 0 |
| PB9 | 0 |
The content of the MPEG infoframe can be reported as low level results or high level results, selected by a switch.
Low level reporting consists of one result line for each byte in the infoframe in the order specified in the two tables above.
High level reporting consists of the results specified in the table below:
| Measurement Parameter | Definition | Range |
|---|---|---|
| Bit Rate | Bit Rate | 0-15 |
| Field Repeat | Field Repeat | 0-15 |
| Frame | Frame | 0-15 |
General Parameters
The General Parameters report provides general measurement information that does not belong to a specific packet group. Parameters in this report are bundled into groups, where each group starts with a line indicating the name of the group, followed by a number of parameter lines, then terminated by a blank line.
At present, NI VMS only supports the Measurement Time parameter group, which records the time at which NI VMS performs the Video Signal Info measurement. This parameter group is intended for time-stamping purposes.
| Measurement | Definition | Range |
|---|---|---|
| Meas Year | Year in which NI VMS performed the measurement | YYYY |
| Meas Month | Month in which NI VMS performed the measurement | 1-12 |
| Meas Day of Month | Day on which NI VMS performed the measurement | 1-31 |
| Meas Hour | Hour at which NI VMS performed the measurement | 0-23 |
| Meas Minutes | Minute at which NI VMS performed the measurement | 0-59 |
| Meas Seconds | Second at which NI VMS performed the measurement | 0-59 |
| Meas DST? | Indicates whether NI VMS performed the measurement during Daylight Savings Time, indicated by 1, or not, indicated by 0 | 0-1 |
General Timing
The general timing parameters provide timing measurement information that is not reported in the standard infoframes.
| Measurement | Definition | Units |
|---|---|---|
| Total Line Length | Total length of a video line in Pixels (and µs) | Pixels, µs |
| Total Lines | Total number of lines | Lines |
| Length of all lines | µs | |
| Active Line Length | Length of active video part of a line in Pixels (and µs) | Pixels, µs |
| Active Lines | Number of Active Lines | Lines |
| HSYNC Width | Horizontal sync pulse width in Pixels (and µs) | Pixels, µs |
| H Front Porch | Horizontal Front Porch width in Pixels (and µs) | Pixels, µs |
| V Front porch | Vertical Front Porch width in Lines | Lines |
| VSYNC to Active Video | Number of lines from VSYNC pulse to start of Active Video | Lines |
Backward Compatible
In order to maintain backward compatibility, a "Backward Compatible" report is available. This report produces the same results as the "Video Signal Info" measurement in earlier NI VMS releases.
| Measurement | Definition | Units |
|---|---|---|
| Frame rate | The frame rate of the acquired digital video signal | Hz |
| Total Width | Total length of a video line in Pixels | Pixels |
| Total Height | Total number of lines | Lines |
| Active Width | Length of active video part of a line in Pixels | Pixels |
| Active Height | Number of Active Lines | Lines |
| Interlaced | Interlaced (True) or progressive (False) digital video acquired | Boolean |
| Bits pr Sample | Number of bits pr sample in acquired video signal | |
| RGB Format | RGB (True) or YUV (False) | Boolean |
| 4:2:2 Format | 4:2:2 format (True) or 4:4:4 format (False) | Boolean |
| Encrypted | Encrypted (True) or unencrypted (False) | Boolean |