Using Objective and Subjective Quality Tests

Here’s a column that talks about the requirement to perform both objective and subjective testing when evaluating different encoding techniques or comparing codecs. Here’s the first paragraph.

I spend a lot of time assessing video quality, sometimes to compare different codecs, but more frequently to identify the optimal encoding techniques. For example, does an I-frame interval of 3 seconds deliver substantially better quality than an interval of 1 second? How about VBR vs. CBR, or the very slow x265 preset compared to medium? The only way to know is to encode both ways and compare the results.

Click here to read the entire article.

About Jan Ozer

I help companies train new technical hires in streaming media-related positions; I also help companies optimize their codec selections and encoding stacks, and evaluate new encoders and codecs.

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