Audio-frequency processing device and sound-volume management method
A volume management and audio processing technology, applied in the direction of electrical components, amplification control, gain control, etc., can solve the problems of unreasonable volume adjustment and unbearable audience, and achieve the effect of avoiding manual volume adjustment
Inactive Publication Date: 2012-05-23
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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[0004] However, the volume is automatically adjusted according to the change of the signal-to-noise ratio. If the volume of the noise is very small at the beginning, the signal-to-noise ratio will be very large, and if the volume of the noise is doubled while keeping the signal-to-noise ratio unchanged. In fact, the noise will not affect much, but if the strength of the signal is doubled, it will make the listener unbearable
In addition, the impact of the audio signal on the listener's ears is determined by the audio intensity, not just by the gain value, so simply adjusting the volume is not reasonable enough
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[0012] The volume management method provided by the present invention can be used in audio processing devices of many electronic devices, such electronic devices can be car stereos, home theaters, audio reproduction devices, electronic reading devices, etc. This embodiment lists an audio processing device of an audio reproduction device Make an introduction.
[0013] Such as figure 1 Shown is a structural diagram of the audio processing device 10 in this embodiment. The audio processing device 10 includes a storage unit 11, an input unit 12, a central processing unit 13, a decoding unit 14, a digital-to-analog converter 15, a volume control unit 16, an audio output device 17, a volume management unit 18. A microphone 19 and an analog-to-digital converter 20 .
[0014] The storage unit 11 stores a plurality of audio files and decoding programs. The input unit 12 is used for generating and sending a command signal to the central processing unit 13 in response to a user's oper...
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When listener adjusts volume manually, the volume management system executes following steps: calculating out an average noise volume level in a prearranged time period, and setting up the average noise volume level as a reference noise volume level; hereafter, calculating current average noise volume level periodically, and calculating variable rate of current average noise volume level comparedwith the reference noise volume level; at same time, calculating audio energy value of audio signal periodically; based on the variable rate, and audio energy value to adjust the audio energy value, and calculating out preferred gain value; sending the preferred gain value to a volume control unit to carry out magnifying audio signal. In the environment, where noise volume is changed frequently, the invention can reduce number of manual operation by listener, and let listener listens in audio under proper volume level.
Description
【Technical field】 [0001] The present invention relates to an audio processing device and its volume management method, in particular to a system and method for automatically adjusting volume according to changes in ambient noise. 【Background technique】 [0002] With the development of digital technology, the audio processing system has become more and more perfect, and the sound quality has become clearer and more realistic. However, ordinary audio processing systems are still unable to compensate for the impact of environmental noise, especially when the listener is in an environment where the noise volume changes frequently. covered by. In view of this, listeners need to adjust the volume frequently, that is, when the ambient noise is loud, turn up the volume, and when the ambient noise is low, turn down the volume. This can be very annoying to the listener, especially when the listener is driving a car and potentially dangerous. [0003] In order to solve this problem,...
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IPC IPC(8): H03G3/20
Inventor 谢冠宏李晓光连文钏蔡文升李兵
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD