Frequency Domain Long-Term Prediction for Low Delay General Audio Coding

Autor:	Bernd Edler, Ning Guo
Rok vydání:	2021
Předmět:	Modified discrete cosine transform Computer science Applied Mathematics Algorithmic efficiency Frequency domain Signal Processing Harmonic Electrical and Electronic Engineering Long-term prediction Joint (audio engineering) Algorithm Domain (software engineering) Coding (social sciences)
Zdroj:	IEEE Signal Processing Letters. 28:1185-1189
ISSN:	1558-2361 1070-9908
Popis:	In this paper we propose a long-term prediction method for low delay transform domain general audio coders. This Frequency Domain Joint Harmonics Prediction (FDJHP) method operates directly in the Modified Discrete Cosine Transform (MDCT) domain and can enhance the coding efficiency, even under very low frequency resolutions. We compare this new method with state-of-the-art MDCT based methods by analyzing bitrate savings and by a listening test using test signals with strong harmonic components. The results indicate that it outperforms an existing method, which also directly operates in the frequency domain. Additionally, we show how it can be combined with the existing techniques into an adaptive system, where the different methods can complement each other.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e7d3536515081ab9764e6c9afeebc16b https://doi.org/10.1109/lsp.2021.3084503 Zobrazit plný text záznamu