| 摘要 |
FIELD: information technology.SUBSTANCE: device has an input for receiving an audio signal; a low-frequency region encoder for encoding the low-frequency region of the audio signal; a high-frequency region encoder for encoding the high-frequency region of the audio signal by performing an operation for inserting and encoding single-frequency components when the tone selection controller indicates that the audio signal is a tone signal, and performing selection of the band copy, scaling the band copy and inserting single-frequency components when the tone selection controller indicates that the audio signal is normal; and a controller for selecting at least two of said single-frequency components and for forming an indicator, wherein the indicator is configured to represent said at least two single-frequency components, and also configured depending on the frequency interval between two single-frequency components.EFFECT: high efficiency and accuracy of encoding signals.22 cl, 9 dwg |
