Title:
APPARATUS AND METHOD FOR SYNCHRONIZING VOICE CLOCK OF WIRELESS MICROPHONE AND OF BUILT-IN MICROPHONE
Document Type and Number:
WIPO Patent Application WO/2019/210882
Kind Code:
A1
Abstract:
Provided is an apparatus for synchronizing a voice clock of a wireless microphone and of a built-in microphone, wherein the wireless microphone is connected to a DECT chip so that the wireless microphone has the same clock as the DECT chip; the built-in microphone is connected to an ADC chip so that the built-in microphone has the same clock as the ADC chip; a corrected accurate work clock of a digital processor is output by the DECT chip and is configured to drive the ADC chip; an acceptable frequency such as 12.288 M and 6.144 M is output by a phase-locked loop inside the ADC chip and is supplied to other chips in a system as a voice data processing drive clock; and after receiving the voice data processing drive clock output by the ADC chip, the DECT chip obtains a voice data sampling rate clock of the DECT chip after internal frequency division and supplies same to the ADC ship at the same time, so that real clock synchronization between the DECT chip and the ADC chip is realized and the work clock of the wireless microphone and of the built-in microphone are synchronized. In this way, a reliable basis is provided for an echo cancellation algorithm and the echo cancellation effect of the echo cancellation algorithm is improved.
Inventors:
LU RONGFU (CN)
FENG WANJIAN (CN)
ZENG BINGYANG (CN)
YE GUOZHEN (CN)
JIANG JUN (CN)
FENG WANJIAN (CN)
ZENG BINGYANG (CN)
YE GUOZHEN (CN)
JIANG JUN (CN)
Application Number:
PCT/CN2019/085570
Publication Date:
November 07, 2019
Filing Date:
May 05, 2019
Export Citation:
Assignee:
YEALINK XIAMEN NETWORK TECH CO LTD (CN)
International Classes:
H04R3/12; H04J3/06
Domestic Patent References:
| WO2016179392A1 | 2016-11-10 |
Foreign References:
| CN206332831U | 2017-07-14 | |||
| CN108494517A | 2018-09-04 |
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (CN)
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