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Topic: ABC/HR & BS.1116 scales (Read 4147 times) previous topic - next topic
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ABC/HR & BS.1116 scales

ABC/HR's scale is as follows:

5.0 = Imperceptible
4.0 = Perceptible, but not annoying
3.0 = Slightly annoying
2.0 = Annoying
1.0 = Very annoying

But in "Subjective Evaluation of State-of-the-Art 2-Channel codecs" by Soulodre et al, which they say was carried out "in accordance with the subjective testing procedures outlined in ITU-R Recommendation BS. 1116", they quote the following scale on the last page of the paper:

5.0 = Imperceptible
4.0 to 4.9 = Perceptible, but not annoying
3.0 to 3.9 = Slightly annoying
2.0 - 2.9 = Annoying
1.0 - 1.9 = Very annoying

So these two scales are the same for Imperceptible, but for anything below 5.0 the two scales are offset wrt to the other by 0.5 (or for pedants, 0.45).

Could someone that has the BS.1116 standard document say which scale they use please?

ABC/HR & BS.1116 scales

Reply #1

ABC/HR & BS.1116 scales

Reply #2
Thanks.

 
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