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0014B - Audio Test Tones
published
0014B v2.0
Item image
TEST TONES
Standard Test Tones
EBU Tech 3304 BLITS, GLITS
Duration, Search Area, Freq.
Tone Type, Channel Number
https://qc.ebu.io/items/0014B/versions/2-0-0/
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Summary
EBU QC Id
0014B
Name
Audio Test Tones
Status
published
Category
absolute
Lead editor
Eric Carson
Aliases
monotone audio detection line-up tone
Tags
audio
Versions
Version Status Edition date Saved by Note
Details
Definition
System shall detect if standard test tones are present in the programme. This test item can be used in conjunction with EBU QC Test Item 0052B.

In the frequency domain, the system will seek out single tone audio, either at a specific frequence (such as 440 Hz) or at any frequency. The system will also seek out known test patterns, including "left ident" test tone, in which one channel periodically drops to silence.

Optionally, aditional test patterns (such as GLITS and BLITS) may be detected.
References

  • [https://tech.ebu.ch/docs/tech/tech3304.pdf EBU Tech 3304]

    Remark: BLITS (BSkyB)

  • [https://tech.ebu.ch/docs/r/r049.pdf EBU R 049]

    Remark: Stereo

  • [http://www.digitalproductionpartnership.co.uk/downloads/standards/ BBC GLITS]

Examples

  • 00:10:39:00 - 00:10:41:00 2 seconds of 440 kHz tone detected on channel 1.

Input parameters
Name Description
Output parameters
Name Description
Test material
Title Version Download
Remarks
Remarks
This test can be used to detect tones during programme material i.e. where they are not wanted.
It can also be used to detect the presence of test tones where the are required and to detect the type of tone. For example 1kHz tone is expected at 09:59:30:00 for 20 seconds

Golden Eyes/Ears EBU QC Test Item 0102B (AV LIneup) can be used where automation is not viable.

Note: that legacy material may have tone frequencies slightly different from the expected value, so the expected value is optional.
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