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
| Title | Year | Author | Number |
|---|---|---|---|
| CONVERTING CODING/DECODING OF HARMONIOUS AUDIO SIGNALS | 2017 |
|
RU2744477C2 |
| TRANSFORMING CODING/DECODING OF HARMONIC SOUND SIGNALS | 2012 |
|
RU2637994C1 |
| BROADBAND OF HARMONIC AUDIO SIGNAL | 2012 |
|
RU2725416C1 |
| HARMONIC AUDIO FREQUENCY BAND EXPANSION | 2012 |
|
RU2610293C2 |
| APPARATUS, METHOD, OR COMPUTER PROGRAM FOR ESTIMATING THE TIME DIFFERENCE BETWEEN CHANNELS | 2019 |
|
RU2762302C1 |
| AUDIO ENCODER FOR ENCODING AN AUDIO SIGNAL, A METHOD FOR ENCODING AN AUDIO SIGNAL AND A COMPUTER PROGRAM WHICH TAKE INTO ACCOUNT A DETECTABLE SPECTRAL REGION OF PEAKS IN THE UPPER FREQUENCY RANGE | 2017 |
|
RU2719008C1 |
| AUDIO SIGNAL COMPRESSION | 2005 |
|
RU2409874C9 |
| LOW BIT RATE AUDIO ENCODING/DECODING SCHEME WITH COMMON PREPROCESSING | 2009 |
|
RU2483365C2 |
| AUDIO UPMIXING DEVICE WITH THE POSSIBILITY OF OPERATING IN THE MODE WITH/WITHOUT PREDICTION | 2020 |
|
RU2799737C2 |
| AUDIO UPMIX DEVICE CONFIGURED TO OPERATE IN PREDICTION MODE OR IN MODE WITHOUT PREDICTION | 2019 |
|
RU2717387C1 |
