Echo cancellation device of law enforcement recorder
A law enforcement recorder and echo cancellation technology, applied in instruments, transmission systems, voice analysis and other directions, can solve the problems of sound vibration, howling, affecting the quality of calls, etc., and achieve the effect of improving efficiency and effect.
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[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
[0018] Reference figure 1 , An echo cancellation device for a law enforcement recorder, including a remote user, a remote user voice input device, a remote user voice output device, a first signal converter, a radio transmission device, a sound processing device, a second signal converter, The local user voice output device, the local user voice input device and the local user, the remote user is connected to the remote user voice input device, the output end of the remote user voice input device is connected to the input end of the first signal converter, the first signal The converter is used to convert the acoustic signal received by the...
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