FIELD: information technology.
SUBSTANCE: invention relates to means of encoding and decoding of harmonic audio signals. Encoder for encoding frequency transform coefficients of a harmonic audio signal includes following elements: a peak locator, configured to locate spectral peaks having magnitudes exceeding a predetermined frequency dependent threshold. Peak region encoder configured to encode peak regions including and surrounding located peaks. Low-frequency set encoder configured to encode at least one low-frequency set of coefficients outside the peak regions and below a crossover frequency that depends on ] number of bits used to encode peak regions. Noise-floor gain encoder, configured to encode a noise-floor gain of at least one high-frequency set of not yet encoded coefficients outside peak regions.
EFFECT: technical result consists in improvement of quality of encoded harmonic audio signal.
20 cl, 23 dwg, 1 tbl
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BROADBAND OF HARMONIC AUDIO SIGNAL | 2012 |
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AUDIO SIGNAL COMPRESSION | 2005 |
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RU2409874C9 |
LOW BIT RATE AUDIO ENCODING/DECODING SCHEME WITH COMMON PREPROCESSING | 2009 |
|
RU2483365C2 |
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RU2717387C1 |
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RU2799737C2 |
Authors
Dates
2017-02-17—Published
2012-10-30—Filed