Digital earphone and electronic terminal

Abstract

The invention provides a digital earphone and an electronic terminal. The digital earphone comprises a first communication interface, an audio codec, a loudspeaker, a microphone and a frequency modulation antenna. The first communication interface receives a digital audio stream signal from the electronic terminal in a state of being connected with the electronic terminal. The audio codec convertsthe digital audio stream signal received through the first communication interface into an analog audio signal. An analog audio signal obtained through conversion is output through a loudspeaker. Themicrophone collects external sound to generate analog microphone signals, the grounding end of the audio codec is connected to the grounding terminal of the first communication interface, and the frequency modulation antenna is connected to the terminal, used for achieving the frequency modulation function, of the first communication interface so that the frequency modulation signals received from the frequency modulation antenna can be output through the terminal of the first communication interface. By adopting the digital earphone and the electronic terminal provided by the embodiment of the invention, the anti-interference capability and the channel quality of the frequency modulation signal are effectively improved.

Description

technical field [0001] The present invention generally relates to the technical field of audio processing, and more specifically, relates to a digital earphone and an electronic terminal supporting a frequency modulation (FM, Frequency Modulation) function. Background technique [0002] With the continuous update and development of electronic technology, the traditional analog 3.5 mm headphone jack or the analog Universal Serial Bus (USB, Universal Serial Bus) headphone jack on the electronic terminal is being replaced by the digital USB headphone jack. At present, the audio interface on the electronic terminal It is developing in the direction of digital USB interface. [0003] The FM performance of the traditional analog earphone is mainly realized by sharing the ground signal line of the analog earphone, that is, the ground signal line of the earphone is used as the antenna of the FM function of the electronic terminal. Such as figure 1 As shown, the left speaker LEFT, ...

AI Technical Summary

Problems solved by technology

[0006] At present, audio codecs are generally integrated in digital earphones. If the FM antenna and the ground signal line of the earphone are co-wired in the way of analog earphones, not only the isolation circuit is still required, but also the noise amplitude of the earphone ground signal line will increase, which is serious. Affects FM antenna performance, for example, may lead to a decrease in the number of searched channels, poor voice quality, and a decrease in FM experience for electronic end users

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