Signal correction method and apparatus, and terminal

A signal correction apparatus, wherein the apparatus comprises:

• an input circuit, configured to receive an input signal, wherein the input signal is an audio signal or an image signal, the input signal comprises signals that are corresponding to multiple units respectively, and any one of the units is a sampling point of the audio signal or a pixel unit of the image signal;
• a texture detector, configured to perform texture detection on a target unit in the input signal according to a signal of at least one unit within a neighborhood in which the target unit is located, to obtain a first signal, wherein the first signal indicates texture features of the target unit and the neighborhood;
• a high frequency extractor, configured to extract a high frequency component of a signal of the target unit according to the signal of the at least one unit within the neighborhood to obtain a second signal;
• an fusion circuit, configured to perform multiplication processing and non-linear processing on the first signal and the second signal, to obtain a sharpness correction signal of the target unit, wherein an amplitude of the sharpness correction signal has a linear relationship with an amplitude of the signal of the target unit;
• and
• a first adder, configured to perform sharpness correction on the signal of the target unit according to the sharpness correction signal.