A test of MPEG using time-inverted spoken audio

Author

McLaughlin, Thomas ; Cookson, John ; Rasmussen, Lloyd

Author_Institution

Nat. Libr. Service for the Blind & Physically Handicapped, Washington, DC, USA

Volume

2

fYear

1996

fDate

7-10 May 1996

Firstpage

1025

Abstract

We excerpted a 20 second sample from a DAT-mastered talking book segment and encoded it at 32 and 48 kbit/sec using MPEG I, layer 3. We also encoded the same segment at 80 kbit/sec. using MPEG I, layer 2. We then encoded a time-inverted version of the material in the same way. After decoding, we put the inverted segments back into normal sequence and compared them with the corresponding segments encoded in normal temporal order. We did the comparison by means of an ABX test with volunteer listeners. Naive listeners were unable to reliably distinguish between material coded in normal temporal order and the same material coded in inverted order. Trained listeners could reliably make the distinction in layer 3 at 32 and 48 kbit/sec. but not in layer 2 at 80 kbit/sec

Keywords

audio coding; code standards; decoding; digital audio tape; speech coding; telecommunication standards; 20 sec; 32 kbit/s; 48 kbit/s; 80 kbit/s; ABX test; DAT-mastered talking book segment; MPEG I; decoding; inverted order; layer 2; layer 3; naive listeners; temporal order; time-inverted spoken audio; trained listeners; Acoustic testing; Audio systems; Books; Codecs; Decoding; ISO standards; Materials reliability; Materials testing; Software libraries; Transform coding;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on

Conference_Location

Atlanta, GA

ISSN

1520-6149

Print_ISBN

0-7803-3192-3

Type

conf

DOI

10.1109/ICASSP.1996.543298

Filename

543298