@inproceedings{fae0e1e27c1944f0a710de37da51330a,
title = "Design of an MPEG-4 general audio coder for improving speech quality",
abstract = "This paper proposes a design for an ISO/IEC MPEG-4 general audio encoder to improve the speech quality at low bit rates. The main contributions to the improvement are using i) a higher sampling rate to get higher time resolution for a given frame length and ii) adaptive preprocessing to reduce the bandwidth. Listening tests at 8 and 16 kbit/s showed that compared with a conventional audio coder and a speech-specific coder, the proposed coder provided better speech quality than the conventional audio coder (MP3) while keeping the quality for music. For speech signals, however, the speech-specific coder (MPEG-4 CELP) produced significantly better quality than the audio coders. The proposed design will be especially useful for low-bit-rate audio-visual delivery applications which may include both speech and music signals.",
keywords = "Bandwidth, Bit rate, Digital audio players, IEC, ISO, MPEG 4 Standard, Sampling methods, Signal design, Speech, Testing",
author = "T. Moriya and A. Jin and N. Iwakami and T. Mori",
note = "Publisher Copyright: {\textcopyright} 2000 IEEE.; IEEE Workshop on Speech Coding ; Conference date: 17-09-2000 Through 20-09-2000",
year = "2000",
doi = "10.1109/SCFT.2000.878429",
language = "English",
series = "2000 IEEE Workshop on Speech Coding - Proceedings: Meeting the Challenges of the New Millennium",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "139--141",
booktitle = "2000 IEEE Workshop on Speech Coding - Proceedings",
}