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Accession number;03A0296575
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| Title;SmartJukebox: An Efficient and High-Quality MPEG-2 AAC Encoder |
| Author;
TAKAMIZAWA Y
(Nec Corp.)
NOMURA T
(Nec Corp.)
IKEKAWA M
(Nec Corp.)
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Journal Title;NEC Res Dev
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Journal Code:G0138A
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ISSN:0547-051X
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VOL.44;NO.2;PAGE.203-208(2003)
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| Figure&Table&Reference;FIG.4, TBL.3, REF.11 |
| Pub. Country;Japan |
| Language;English |
| Abstract;This paper describes high-quality and processor-efficient software implementation of an MPEG-2 AAC LC Profile encoder utilized in "SmartJukebox," music jukebox software. MDCT and quantization processing are accelerated by 21.3% and 19.0%, respectively, through the use of SIMD instructions. In addition, psycho-acoustic analysis in the MDCT domain makes the use of FFTs unnecessary and reduces the computational cost of the analysis by 56.0%. The results of subjective quality tests show that better sound quality is provided by greater efficiency in quantization processing and Huffman coding. All of this results in high-quality and processor-efficient software implementation of an MPEG-2 AAC encoder. Subjective test results show that the sound quality achieved at 96kbps/stereo is equivalent to that of MP3 at 128kbps/stereo. The encoder works 13 times faster than real time for stereo encoding on an 800MHz Pentium III processor. (author abst.) |
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