A Framework for a Near-Optimal Excitation Based Rate-Distortion Algorithm for Audio Coding
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M. Vilermo, "A Framework for a Near-Optimal Excitation Based Rate-Distortion Algorithm for Audio Coding," Paper 7621, (2008 October.). doi:
M. Vilermo, "A Framework for a Near-Optimal Excitation Based Rate-Distortion Algorithm for Audio Coding," Paper 7621, (2008 October.). doi:
Abstract: An optimal excitation based rate-distortion algorithm remains an elusive target in audio coding. Typical complexity of the problem for one frame alone is in the order of 60^50. This paper presents a framework for reducing that complexity. Excitation is calculated using cochlear filters that have relatively steep slopes above and below the central frequency of the filter. An approximation of the excitation can be calculated by limiting the cochlear filters to a small frequency region. For example, the cochlear filters may span 15 subbands. In this way, the complexity can be reduced approximately to the order of 60^15*50.
@article{vilermo2008a,
author={vilermo, miikka},
journal={journal of the audio engineering society},
title={a framework for a near-optimal excitation based rate-distortion algorithm for audio coding},
year={2008},
volume={},
number={},
pages={},
doi={},
month={october},}
@article{vilermo2008a,
author={vilermo, miikka},
journal={journal of the audio engineering society},
title={a framework for a near-optimal excitation based rate-distortion algorithm for audio coding},
year={2008},
volume={},
number={},
pages={},
doi={},
month={october},
abstract={an optimal excitation based rate-distortion algorithm remains an elusive target in audio coding. typical complexity of the problem for one frame alone is in the order of 60^50. this paper presents a framework for reducing that complexity. excitation is calculated using cochlear filters that have relatively steep slopes above and below the central frequency of the filter. an approximation of the excitation can be calculated by limiting the cochlear filters to a small frequency region. for example, the cochlear filters may span 15 subbands. in this way, the complexity can be reduced approximately to the order of 60^15*50.},}
TY - paper
TI - A Framework for a Near-Optimal Excitation Based Rate-Distortion Algorithm for Audio Coding
SP -
EP -
AU - Vilermo, Miikka
PY - 2008
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - October 2008
TY - paper
TI - A Framework for a Near-Optimal Excitation Based Rate-Distortion Algorithm for Audio Coding
SP -
EP -
AU - Vilermo, Miikka
PY - 2008
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - October 2008
AB - An optimal excitation based rate-distortion algorithm remains an elusive target in audio coding. Typical complexity of the problem for one frame alone is in the order of 60^50. This paper presents a framework for reducing that complexity. Excitation is calculated using cochlear filters that have relatively steep slopes above and below the central frequency of the filter. An approximation of the excitation can be calculated by limiting the cochlear filters to a small frequency region. For example, the cochlear filters may span 15 subbands. In this way, the complexity can be reduced approximately to the order of 60^15*50.
An optimal excitation based rate-distortion algorithm remains an elusive target in audio coding. Typical complexity of the problem for one frame alone is in the order of 60^50. This paper presents a framework for reducing that complexity. Excitation is calculated using cochlear filters that have relatively steep slopes above and below the central frequency of the filter. An approximation of the excitation can be calculated by limiting the cochlear filters to a small frequency region. For example, the cochlear filters may span 15 subbands. In this way, the complexity can be reduced approximately to the order of 60^15*50.
Author:
Vilermo, Miikka
Affiliation:
Nokia Research Center
AES Convention:
125 (October 2008)
Paper Number:
7621
Publication Date:
October 1, 2008Import into BibTeX
Subject:
Low Bit-Rate Audio Coding
Permalink:
http://www.aes.org/e-lib/browse.cfm?elib=14772