Musical instrument wireless transmission system based on 2.4G wireless digital audio technique

Abstract

The invention discloses a musical instrument wireless transmission system based on 2.4G wireless digital audio technology which includes a musical instrument wireless emitter and a wireless receiver. The emitter and the receiver are matched into a receiving / transmitting system; the system uses self-adaptive frequency hopping technology in international 2.4G ISM frequency band, can automatic avoid strong jamming frequency band, and has high audio transmission quality and stronger communication confidentiality; the musical instrument wireless emitter includes musical instrument pickup device part, audio preprocessor part, AD convertor part, coding demodulation part, RF transmitting part, LCD display part and electrical source part; the musical instrument wireless receiver includes RF receiver part, demodulation decoding part, DA convertor part, audio output processing part, USB recording access part, LCD state display part and electrical source part. The musical instrument wireless transmission system solves problems of large noise and wiring in disorder caused by traditional audio cable connection in stage; conveniences of wireless connection abandons cable that limits bandsman move in musical instrument thoroughly, gives enough free acting space to bandsman.

Description

technical field [0001] The invention relates to a brand-new musical instrument connection method, in particular to the application of a wireless digital audio transmission technology in the field of musical instruments, which is applicable to all electroacoustic musical instruments such as electric guitars, electric box pianos, electric basses, electronic violins, and electronic pianos. Background technique [0002] At present, electro-acoustic musical instruments are developing rapidly, and the application of a large number of new technologies has strongly promoted the development of new products. However, there is no obvious breakthrough in the ancient connection method, and the cable connection is still the main method; the output level of the electro-acoustic instrument pickup is very high. Small, high output impedance, cable connection is inevitably affected by electromagnetic radiation interference from stage lighting, transformers and other electronic equipment; even i...

AI Technical Summary

Problems solved by technology

[0002] At present, electro-acoustic musical instruments are developing rapidly, and the application of a large number of new technologies has strongly promoted the development of new products. However, there is no obvious breakthrough in the ancient connection method, and the cable connection is still the main method; the output level of the electro-acoustic instrument pickup is very high. Small, high output impedance, cable connection is inevitably affected by electromagnetic radiation interference from stage lighting, transformers and other electronic equipment; even if high-quality shielded cables are used to minimize radiation interference, once it is applied to a large stage , the capacitance of the cable itself will increase as the length of the cable increases, the attenuation of high frequency signals will increase, and the transmission speed of high frequency signals will be significantly lower than that of low frequency signals, resulting in phase drift, and the clarity and cohesion of timbre will be greatly reduced. The quality of signal transmission is affected to a large extent; at the same time, there are many devices on the stage, and the dense cable connections make the wiring difficult, appearing to be staggered and messy, which is likely to cause many problems such as musicians tripping and damage to instruments; Root cables, unable to freely follow the music with body movements, which also has certain restrictions on the performance effect

[0003] In view of the lack of cable connection, some foreign large-scale musical instrument manufacturers have developed wireless transmission systems that are attached to musical instruments, which solves the problem of musicians’ movement to a certain extent. However, these wireless systems use analog modulation in the UHF frequency band and have a narrow frequency , susceptible to interference, poor compatibility between similar devices, after being interfered, only the frequencies of the transmitting and receiving ends can be changed manually, and large-scale application cannot be promoted

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