VITS Vertical Interval Test Signals

What is VITS?

Vertical Interval Test Signals

Not to be confused with Test Patterns VITS is a test signal that has information for white level, black level and can be used to re-calibrate signal to noise ratio metadata.

Standard View

Expanded View

Useful Resources

Detailed Interactive Breakdown

Using it in ld-process-vits

This application performs an analysis of the VITS (Vertical Interval Test Signals) and recalculates the white and black SNR values in the metadata. Note that any TBC file will already have this metadata provided by ld-decode.

This tool is generally used along with dropout correction and stacking as the video content of the TBC is modified - running ld-process-vits therefore allows you update the SNR metadata in order to analyse the result (using ld-analyse).

Use the tool by specifying the required input .tbc file. The tool will backup the previous JSON file (to .vbup) before proceeding.

ld-process-vits <input>

Help Command Options

Options:
  -h, --help                Displays this help.
  -v, --version             Displays version information.
  -d, --debug               Show debug
  -q, --quiet               Suppress info and warning messages
  --input-json <filename>   Specify the input JSON file (default input.json)
  --output-json <filename>  Specify the output JSON file (default same as
                            input)
  -n, --nobackup            Do not create a backup of the input JSON metadata
  -t, --threads <number>    Specify the number of concurrent threads (default
                            is the number of logical CPUs)

Arguments:
  input                     Specify input TBC file

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