Pick-up device and method

Abstract

The invention discloses a pick-up device and method. The pick-up device comprises a digital signal processor, at least one microphone, multiple amplifiers and multiple analog-digital converters. Each microphone is used for receiving an audio signal and sending the audio signal to the amplifier corresponding to the microphone. Each amplifier is used for amplifying the received corresponding audio signal and sending the amplified audio signal to the analog-digital converter corresponding to the amplifier. Each analog-digital converter is used for converting the received corresponding audio signal into a digital signal and sending the digital signal to a digital signal processor. The digital signal processor is used for receiving the digital signals sent by the analog-digital converters, confirming the digital signals where clipping is not conducted from the received digital signals, and confirming output signals according to gain values corresponding to the digital signals where clipping is not conducted. The pick-up device can have good pick-up performance in various pick-up scenes.

Description

technical field [0001] The embodiments of the present invention relate to the field of audio signal processing, and more specifically, to a sound pickup device and a sound pickup method. Background technique [0002] Recording is one of the necessary functions of handheld terminal devices such as mobile phones. by figure 1 The sound pickup device 100 shown is an example, the sound pickup device 100 first picks up the sound through the microphone 101, and converts the acoustic signal into an analog electrical signal; The electrical signal is amplified / adapted to the system specification range; the amplified analog electrical signal is then transmitted to an analog-to-digital converter (Analog-to-Digital Conversion, ADC) 103 to realize the digital conversion of the analog electrical signal; finally, The recording data is stored in the memory 104 of the sound pickup device 100 for playback and reproduction later. [0003] For the sound pickup functions such as recording ment...

AI Technical Summary

Problems solved by technology

[0004] like figure 1 As shown, in the prior art, a typical pickup device includes a microphone, an amplifier, and an ADC. At this time, it is difficult to simultaneously consider the three indicators of the maximum supported sound pressure, signal-to-noise ratio, and sensitivity.

For example, if it is expected that the sound pickup device can obtain a sufficiently high signal-to-noise ratio and high sensitivity in low-volume or typical-volume sound pickup scenarios, under high sound pressure conditions, the electrical signal obtained after the microphone conversion will increase with the sound pressure The strengthening of the sound becomes larger rapidly, which exceeds the sound pressure support capability of the pickup device. At this time, even if the diaphragm of the microphone does not clip, the analog circuit at the back end will clip; If the signal-to-noise ratio and sensitivity are small, the electrical signal converted by the microphone will be submerged in the noise signal and cannot be discerned under low volume conditions.

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