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DCC
2007
IEEE

Lossless and Near-Lossless Audio Compression Using Integer-Reversible Modulated Lapped Transforms

14 years 3 months ago
Lossless and Near-Lossless Audio Compression Using Integer-Reversible Modulated Lapped Transforms
We present a simple lossless audio codec, composed of an integer-reversible modulated lapped transform (MLT) followed by a backward-adaptive run-length/Golomb-Rice (RLGR) encoder. Its compression performance matches those of state-of-the-art predictive codecs, and it has the advantage that its compressed bitstream contains frequency-domain data that can be used for applications such as search, identification, and visualization. Its compression gain can be improved through a novel data model based on cross-block smoothed spectral magnitude estimates. Its bitstream can be transcoded into a lossy format, for transfers to portable players, at about twice the speed of other codecs. The codec also supports a near-lossless mode, which allows for an extra factor of two in compression without noticeable distortions.
Henrique S. Malvar
Added 25 Dec 2009
Updated 25 Dec 2009
Type Conference
Year 2007
Where DCC
Authors Henrique S. Malvar
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