Signal processing method and signal processing device and signal processing system

A signal and clock signal technology, applied in the field of signal processing methods, devices and systems, can solve the problems of increasing the difficulty of PCB layout, large area occupied by PCB layout, and inability to filter radio frequency signal interference, so as to reduce the probability of TDDnoise occurrence, The effect of reducing the chance of noise entering the GSM signal and reducing the complexity of PCB layout

Active Publication Date: 2015-01-28
XIAOMI INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] EMI devices (including EMI protection components (such as EMI filter) and small-capacity capacitors) cannot filter out radio frequency signal interference (envelope noise) on the entire line, such as the line from the EMI device to the system end in the uplink transmission, And the radio frequency signal interference of the line between the EMI device and the earphone in the downlink transmission cannot be filtered out
[0008] However, due to the need to add EMI protection components and small-capacity capacitors on the line, there are many components on the line, and the PCB layout occupies a large area and the layout is complicated.
At the same time, due to the need for strict protection during PCB layout, it will also increase the difficulty of PCB layout

Method used

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  • Signal processing method and signal processing device and signal processing system
  • Signal processing method and signal processing device and signal processing system
  • Signal processing method and signal processing device and signal processing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Embodiment 1 of the present invention provides an earphone, and the structure of the earphone can be as follows image 3 As shown, it includes a microphone module 11, a signal conversion module 12 and an earphone interface 13, wherein:

[0081] The microphone module 11 is used to collect sound signals, and convert the collected sound signals into analog audio signals;

[0082] The signal conversion module 12 is used to convert the analog audio signal converted by the microphone module into a digital audio signal, and convert the digital audio signal received from the mobile terminal into an analog audio signal;

[0083] The earphone interface 13 includes a power line interface, a ground wire interface, a clock signal interface and a data line interface, wherein:

[0084] The power line interface is used to receive a power signal provided by the mobile terminal;

[0085] The ground wire interface is used to connect with the ground wire provided by the mobile terminal; ...

Embodiment 2

[0093] Embodiment 2 of the present invention provides a mobile terminal, and the structure of the mobile terminal may be as follows Figure 4 As shown, it includes a processor 21 and an earphone jack interface 22, wherein;

[0094] The processor 21 includes a clock signal determination module for determining the clock signal; here, the processor 21 can be understood as a collection of functional modules except the earphone jack interface in the current mobile terminal.

[0095] Between the processor 21 and the earphone jack interface 22, a signal line for transmitting power signals, a signal line for connecting to a ground line, a signal line for transmitting digital audio signals, and a signal line for transmitting the clock The signal line connection of the clock signal determined by the signal determination module;

[0096] The earphone hole interface 22 includes a power line interface, a ground line interface, a data line interface and a clock signal interface, wherein: ...

Embodiment 3

[0108] Embodiment 3 of the present invention provides a signal processing method, which can be applied to the uplink channel transmission process between a mobile terminal and an earphone connected to the mobile terminal, and the steps of the method can be as follows Image 6 shown, including:

[0109] Step 101, perform analog-to-digital conversion.

[0110] In this step, the earphone can collect sound signals, convert the collected sound signals into analog audio signals, and convert the obtained analog audio signals into digital audio signals, so as to realize subsequent digital signal transmission to the mobile terminal.

[0111] Specifically, converting the obtained analog audio signal into a digital audio signal in this step may be triggered immediately after the earphone is powered on, or may be triggered when a clock signal sent by the mobile terminal is received.

[0112] Step 102, sending a digital audio signal.

[0113] In this step, the earphone may send the digit...

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Abstract

The invention provides a signal processing method, a signal processing device and a signal processing system. The signal processing method, the signal processing device and the signal processing system include that a headphone can send digital audio signals to a mobile terminal, and the mobile terminal can also send the digital audio signals to the headphone. Since the signals transmitted between the headphone and the mobile terminal are digital signals, the opportunities that noise enters signals of global system for mobile communications (GSM) are greatly reduced, and the probability of occurrence of the noise on a telecommunications device for the deaf (TDD) is reduced. Meanwhile, without the need of arranging an electromagnetic interference device (EMI) on a main board of the mobile terminal, the area occupied by the layout of a printed circuit board (PCB) can be reduced, and the arrangement complexity of the PCB is lowered; and the PCB does not need to be protected strictly in the arrangement process so that the arrangement difficulty of the PCB can be lowered.

Description

technical field [0001] The present invention relates to the communication field, in particular to a signal processing method, device and system. Background technique [0002] Time Division Distortion (TDD, Time Division Distortion) noise (noise) is a common mobile terminal noise. The reason for this is that the power amplifier (PowerAmplify) of the radio frequency transmitting module of the mobile terminal transmits the Global System for Mobile Communications (GSM) signal at a frequency of 216.8Hz every 1 / 216.8 seconds (the working band of the GSM signal can include 900MHz, 1800MHz or 1900MHz), there will be envelope noise. Since the auditory frequency range of the human ear is 20Hz~20KHz, and the envelope noise generated by the PA when transmitting is 216.8Hz, the frequency of the noise falls within the audible range of the human ear, so when moving If the line in the middle of the earphone connected to the terminal is poorly designed, if there is a chance for noise to en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/00H04B1/38H04M1/725H04M1/72409
Inventor 孙伟郭峰李志杰
Owner XIAOMI INC
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