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Abstract

The demand to deliver the highest quality audio has pushed broadcasters to consider lossless delivery. However, there is a lack of existing perceptual test results for the codecs at high bitrate. Therefore, a subjective listening test (ITU-R BS.1116-3) was carried out to assess the perceived difference in quality between AAC-LC 320kbps and an uncompressed reference. Twelve audio samples were used in the test, which included orchestral, jazz, vocal music and speech. A total of18 participants with various experience levels took part in the experiment. The results showed no perceptible difference between lossless and AAC-LC 320 kbps encoding.

This paper was originally presented at the 144th Convention of the Audio Engineering Society,23–26 May 2018 in Milan, Italy and is also available from the AES’s electronic library at

This publication is part of the Immersive and Interactive Content section

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