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| ATRAC3 is a newly developed compression technology based on
Sony’s proprietary ATRAC(Adaptive TRansform Acoustic Coding). This audio
compression technology is supported by MiniDisc. ATRAC3 achieves twice the data
compression rate of ATRAC with virtually no loss in sound quality. ATRAC3 can
reduce the size of audio data to 1/10 of the original audio source. |
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| Utilizing the characteristics of the human auditory system,
sound that is inaudible to the human ear, and data that occurs before and after
loud sounds are dropped to reduce data size without losing what’s most important,
sound quality. |
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The audio data analyzing resolution is two times higher than
that of the ATRAC system.
This allows more effective compression with the least amount of sound quality
degradation. |
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| The original audio spectral waveform is divided in frequency
bands and then processed in two different map pattern contours for efficient compression
with the least amount of quality degradation. |
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| In the digital signal sequence of 0 and 1, frequently appearing
patterns are replaced with shorter sequences, resulting in a smaller amount of
required data and efficient compression. |
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