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Pickup device and sound source distance determining method

A sound pickup device, the technology of distance

Active Publication Date: 2018-08-24
IFLYTEK CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The application provides a sound pickup device and a sound source distance determination method, the purpose of which is to solve the problem of reducing the accuracy of voice transcription caused by the proximity microphone

Method used

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  • Pickup device and sound source distance determining method
  • Pickup device and sound source distance determining method
  • Pickup device and sound source distance determining method

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Embodiment Construction

[0045] In the process of research, the applicant found that by improving the sensitivity of the short-speaking microphone, although the sound pickup effect for the sound source in the middle field (such as the distance between the sound source and the microphone is 0.3 meters to 1 meter) can be improved, thereby ensuring the sound pickup effect for the middle sound source. The accuracy of the transcription of the field sound source, but it will introduce the following new problems: 1. The high-sensitivity proximity microphone will bring the problem of self-excited howling to the live sound reinforcement. 2. The sensitivity of picking up the noise of the scene is strengthened at the same time, so the signal-to-noise ratio is reduced, and the accuracy of the transcription of the near-field sound source (such as the distance between the sound source and the microphone is less than 0.3 meters) is reduced.

[0046] In order to solve the above problems, the applicant tried to use a m...

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PUM

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Abstract

The invention provides a pickup device comprising a proximity pickup module, a microphone array pickup module and an output control module, wherein the proximity pickup module at least comprises a proximity microphone, and the microphone array pickup module at least comprises a microphone array. The output control module is used for controlling to output a sound signal picked up by the pickup module and / or the sound signal picked up by the microphone array pickup module according to the distance between a sound source and the pickup device. Based on the function of the output control module, the pickup device can output the sound signal output from the microphone array to a voice transfer device in the case of a midfield sound source, thereby avoiding the problem that the voice transfer accuracy is reduced due to the far distance between a speaker and the proximity microphone. Moreover, the pickup module can also output the sound information output by the proximity pickup module to a sound amplifying device, thereby avoiding the echo interference problem caused by using the sound signal output by the microphone array as a sound amplifying source while ensuring the voice transfer accuracy.

Description

technical field [0001] The present application relates to the field of electronic information, in particular to a sound pickup device and a method for determining the distance from a sound source. Background technique [0002] With the development of speech recognition technology, breakthroughs have been made in speech transcription technology, and real-time speech transcription into text has been successfully applied in many scenarios. Meetings are an important scenario for the application of speech transcription. Through online or offline speech transcription technology, the speeches in the meeting are converted into text to form detailed meeting records, which can facilitate the storage, query, retrieval and dissemination of meeting content. [0003] At present, the microphones used in conferences are generally proximity microphones, which require the speaker to be close to the microphone to effectively pick up the sound. In this case, the collected sound signals can also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/12
CPCH04R3/12H04R2430/00
Inventor 王朋朱庆龙谢信珍
Owner IFLYTEK CO LTD
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