A High-Quality Speech and Audio Codec With Less Than 10-ms Delay
Valin, J.-M.
Terriberry, T.B.
Montgomery, C.
Maxwell, G.
Octasic, Inc., Montreal, QC, Canada;
This paper appears in: Audio, Speech, and Language Processing, IEEE Transactions on
Publication Date: Jan. 2010
Volume: 18,
Issue: 1
On page(s): 58-67
ISSN: 1558-7916
INSPEC Accession Number: 10927052
Digital Object Identifier: 10.1109/TASL.2009.2023186
First Published: 2009-05-15
Current Version Published: 2009-10-13
Abstract
With increasing quality requirements for multimedia communications, audio codecs must maintain both high quality and low delay. Typically, audio codecs offer either low delay or high quality, but rarely both. We propose a codec that simultaneously addresses both these requirements, with a delay of only 8.7 ms at 44.1 kHz. It uses gain-shape algebraic vector quantization in the frequency domain with time-domain pitch prediction. We demonstrate that the proposed codec operating at 48 kb/s and 64 kb/s out-performs both G.722.1C and MP3 and has quality comparable to AAC-LD, despite having less than one fourth of the algorithmic delay of these codecs.
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