Virtual bass optimization method and system, intelligent terminal and storage medium

Abstract

The invention provides a virtual bass optimization method and system, an intelligent terminal and a storage medium. The virtual bass optimization method comprises the following steps: acquiring an original audio signal; effective low-frequency signals in the audio signals are extracted; generating second harmonic signals, third harmonic signals and fourth harmonic signals of the effective low-frequency signals and recording the second harmonic signals, the third harmonic signals and the fourth harmonic signals as f (2t), f (3t) and f (4t) respectively; performing constant amplitude conversion on the generated harmonic signals f (2t), f (3t) and f (4t), and performing synthesis through f (Xt) = 0.7 f (2t) + 0.5 f (3t) + 0.3 f (4t) to obtain a synthesized harmonic signal; and superposing and outputting the synthesized harmonic signal and the original audio signal. Compared with an existing synthesis proportion, the synthesis proportion adopted by the optimization method, the intelligent terminal, the system and the storage medium has the advantages that cracking voice and distortion phenomena are avoided, and the optimization method, the intelligent terminal, the system and the storage medium have a better effect especially for equipment which is small in size and capable of making sound laterally (such as a switch panel using the sound laterally).

Description

technical field [0001] The invention relates to a virtual bass optimization system, an intelligent terminal, a method and a storage medium. Background technique [0002] The use of side-firing switch panels, due to structural limitations, uses a small speaker size, which tends to lose low-frequency parts during audio output. At present, there are two conventional solutions. One is to prevent the loss of low-frequency audio by customizing the sound chamber of the side-firing speaker. However, the cost of this solution is relatively high and different structures require different solutions. The second is to use virtual bass. The key point of virtual bass is to generate low-frequency harmonics in the audio signal. After the bass harmonics are generated, equal-loudness conversion is performed and then synthesized. However, the existing synthesis methods are prone to cracking and distortion, especially for devices with small size and side-firing sound (such as switch panels usin...

AI Technical Summary

Problems solved by technology

However, the existing synthesis methods are prone to cracking and distortion, especially for devices with small size and side-firing sound (such as switch panels using side-firing, etc.), cracking and distortion are more likely to occur

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