Comparison of two HE-AAC Codec Implementations Based on Objective Quality Assessment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F17%3A00312006" target="_blank" >RIV/68407700:21230/17:00312006 - isvavai.cz</a>

Výsledek na webu

<a href="http://radio.feld.cvut.cz/conf/poster/proceedings/Poster_2017/Section_EI/EI_042_Smutny.pdf" target="_blank" >http://radio.feld.cvut.cz/conf/poster/proceedings/Poster_2017/Section_EI/EI_042_Smutny.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of two HE-AAC Codec Implementations Based on Objective Quality Assessment

Popis výsledku v původním jazyce

Although normatives of codecs usually contain typical Q-R (Quality-Rate) curves, there are not such curves comparing different implementations of the same codec. In this paper, we describe the experiment of assessing the audio quality of two implementations of the HE-AAC codec created by Fraunhofer institute (FDK AAC (libfdk-aac from FFmpeg) and FhG AAC (enc_fhgaac from Winamp)) in three profiles (AAC-LC, HE-AAC v1 and HE-AAC v2). For assessing the quality, a PEAQ algorithm was used. The quality assessment was performed on the ITU-R BS.1387 audio sample database. The bitrate of samples was chosen from 24 to 112 kbps in 8 kbps increments. The experiment showed, that although the Winamp codec performed generally better than the FFmpeg one, the quality of AAC-LC and HE-AAC v1 does not differ dramatically. However, it is not case of the HE-AAC v2 profile in FDK AAC, which gave very bad results unlike the same profile in FhG AAC codec. It was proved, that, based on the difference in quality, the two implementations are different.

Název v anglickém jazyce

Comparison of two HE-AAC Codec Implementations Based on Objective Quality Assessment

Popis výsledku anglicky

Although normatives of codecs usually contain typical Q-R (Quality-Rate) curves, there are not such curves comparing different implementations of the same codec. In this paper, we describe the experiment of assessing the audio quality of two implementations of the HE-AAC codec created by Fraunhofer institute (FDK AAC (libfdk-aac from FFmpeg) and FhG AAC (enc_fhgaac from Winamp)) in three profiles (AAC-LC, HE-AAC v1 and HE-AAC v2). For assessing the quality, a PEAQ algorithm was used. The quality assessment was performed on the ITU-R BS.1387 audio sample database. The bitrate of samples was chosen from 24 to 112 kbps in 8 kbps increments. The experiment showed, that although the Winamp codec performed generally better than the FFmpeg one, the quality of AAC-LC and HE-AAC v1 does not differ dramatically. However, it is not case of the HE-AAC v2 profile in FDK AAC, which gave very bad results unlike the same profile in FhG AAC codec. It was proved, that, based on the difference in quality, the two implementations are different.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the International Student Scientific Conference Poster – 21/2017

ISBN

978-80-01-06153-4

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

1-7

Název nakladatele

Czech Technical University in Prague

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

23. 5. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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