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Perceived audio quality of compressed audio in game dialogue
Luleå tekniska universitet, Institutionen för konst, kommunikation och lärande, Medier ljudteknik och upplevelseproduktion och teater.
2016 (engelsk)Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
Abstract [en]

A game could have thousands of sound assets, to fit all of those files to a manageable storage space it is often necessary to reduce the size of the files to a more manageable size so they have to be compressed. One type of sound that often takes up a lot of disc space (because there is so much of it) is dialogue. In the popular game engine Unreal Engine 4 (UE4) the the audio is compressed to Ogg Vorbis and has as default the bit rate is set to 104 kbit/s. The goal of this paper is to see if untrained listeners find dialogue compressed in Ogg Vorbis 104 kbit/s good enough for dialogue or if they prefer higher bit rates. A game was made in UE4 that would act as a listening test. Dialogue audio was recorded with a male and a female voice-actor and was compressed in UE4 in six different bit rates. 24 untrained subjects was asked to play the game and identify the two out of six robots with the dialogue audio they thought sound the best. The results show that the subjects prefer the higher bit rates that was tested. The results was analyzed with a chi-squared test which showed that the null-hypothesis can be rejected. Only 21% of the answers were towards UE4s default bit rate of 104 kbit/s or lower. The result suggest that the subjects prefer dialogue in higher bit rates and UE4 should raise the default bit rate.

sted, utgiver, år, opplag, sider
2016. , s. 33
Emneord [en]
Dialogue, Audio, Compression, Games, Game Audio, Lossy Compression, Ogg Vorbis
HSV kategori
Identifikatorer
URN: urn:nbn:se:ltu:diva-61043OAI: oai:DiVA.org:ltu-61043DiVA, id: diva2:1055619
Fag / kurs
Student thesis, at least 15 credits
Utdanningsprogram
Audio Technology, bachelor's level
Veileder
Examiner
Tilgjengelig fra: 2017-02-16 Laget: 2016-12-12 Sist oppdatert: 2017-02-16bibliografisk kontrollert

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