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POP-sound elimination method

A music and sound technology, applied in the field of sound signal processing, can solve the problems of POP sound is not easy to hear, POP sound, etc., to achieve the effect of improving product competitiveness, eliminating POP sound, and avoiding POP sound

Inactive Publication Date: 2014-10-15
SHANGHAI WINGTECH ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the volume is lowered, the POP sound is not easy to hear
In addition, at the beginning of the recording sound, there will also be obvious POP sound phenomenon
[0004] There is no better solution to eliminate the POP sound. In view of this, it is urgent to design a solution to eliminate the POP sound.

Method used

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Embodiment 1

[0038] see figure 1 , the present invention discloses a kind of method (can be used for mobile phone or other electronic equipments) of eliminating POP tone, described method comprises:

[0039] Step A: The codec is connected to the baseband chip of the mobile phone to transmit sound and control commands;

[0040] Step B: Determine the working scene of the mobile phone;

[0041] For the scene where the music is just playing, it is necessary to reset the codec, and then write the corresponding control parameters to open the downlink path of the codec, and set a playback status bit at the same time to record that it is already in the playback state at this time, and then start the music play;

[0042] For the scene of music switching, by judging the playing status bit, it is known that it is already in the playing state, and there is no need to reset the codec or rewrite the control parameters, so as to speed up the switching of music and avoid the generation of POP sound;

...

Embodiment 2

[0047] This embodiment discloses a method for eliminating POP sounds on a mobile phone, please refer to figure 2 , the specific implementation of the present invention in the present embodiment comprises the following steps:

[0048] Step A: Wolfson's Codec (Coder and Decoder, codec) chip, wm5102 and the BBIC (Base Band Integrated circuit, baseband chip) of the mobile phone are used to transmit sound through I2S (Inter-IC Sound) bus connection; through I2C (Inter-IC Sound) -Integrated Circuit) bus connection is used to transmit control commands, such as figure 1 As shown, BBIC takes MTK's 6592 chip as an example. This chip supports 3 I2S and 3 I2C buses, and one of the I2S buses and one I2C bus are connected to wm5102;

[0049] Step B: There are two scenarios for playing music on the mobile phone: the beginning of playback and music switching, both of which may have POP sounds. For the scene of just starting to play music, you need to reset the wm5102 chip, and then write t...

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Abstract

The invention discloses a POP-sound elimination method comprising the steps that a coder-decoder is connected with a baseband chip of a mobile phone and used for transmitting sound and a control instruction; working scenes of the mobile phone are judged; and POP-sound is eliminated under the working scenes of music playing, sound recording and cooperation of music playing and sound recording respectively. In the working scene of cooperation of music playing and sound recording, a coder-decoder needs to be reset, and then corresponding control parameters are written in and used for starting uplink and downlink pathways of the coder-decoder simultaneously. Meanwhile, a sound recording state position and a playing state position are arranged and the current state of the cooperation working mode is recorded. The cooperation working mode is started in the recording process so that the coder-decoder does not need to be reset when a call comes, the control parameters do not need to be written in again, and thus generation of POP-sound is avoided. An objective of POP-sound elimination is achieved by using a software manner completely so that hardware cost can be saved and product competitiveness can be enhanced simultaneously.

Description

technical field [0001] The invention belongs to the technical field of sound signal processing, and relates to a method for eliminating noise, in particular to a method for eliminating POP sound. Background technique [0002] With the development of multimedia technology, the development of mobile terminals is also changing with each passing day. In order to improve the sound quality and sound effect of smart phones, the solution of external Codec is generally used. This solution brings the problem of POP sound while improving the sound quality of mobile phones. [0003] POP sound is also called pop sound, also can be called pops and clicks. It is more obvious when the playback starts and ends, and it feels like the sound of electric shock. However, if the volume is lowered, the POP sound is not easy to hear. In addition, at the beginning of recording sound, there will also be obvious POP sound phenomenon. [0004] Now there is no better solution to eliminate the POP soun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/725H04M1/19H04M1/72442H04M1/72454
Inventor 乔连伟
Owner SHANGHAI WINGTECH ELECTRONICS TECH
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