A signal processing method, device and equipment

Abstract

The embodiment of the invention discloses a signal processing method, device and equipment, which relate to the field of signal processing and are used to solve the phenomenon that the output volume is fluctuating when the terminal switches channels. In the embodiment of the present invention, when the terminal is powered on or performs the operation of switching audio / video channels, the identification of the channel currently used by the terminal for obtaining audio / video signals is obtained; according to the identification of the channel, the The pre-set gain value used to indicate the degree of pre-gain processing on the signal output through the channel and the threshold corresponding to the gain value; wherein, the threshold is used to indicate the volume scaling process of the signal after pre-gain processing degree; use the obtained gain value to perform pre-gain processing on the signal input through the channel; and use the threshold value corresponding to the gain value to perform volume scaling processing on the signal after pre-gain processing and output; thus solving the above problems.

Description

technical field [0001] The present invention relates to the field of signal processing, in particular to a signal processing method, device and equipment. Background technique [0002] With the rapid development of multimedia technology and radio and television technology, smart terminals (such as smart TVs, smart phones, smart mobile TVs, etc.) are usually able to receive and play different types of signals through multiple channels. At present, the more common channels mainly include: ATV (Analog Television, analog TV), DTV (Digital Television, digital TV), AV (Audio Video, audio video), YPbPr (component analog system), HDMI (High Definition Multimedia Interface, high high-definition multimedia), etc. [0003] Smart terminals generally have an AVC (Auto Volume Control, automatic volume control) function. In practical applications, the smart terminal first uses the pre-set gain value for the current audio / video channel to perform pre-gain (PreGain) processing on the input...

AI Technical Summary

Problems solved by technology

[0005] However, due to the different encoding and decoding environments, transmission environments and other factors of different channels, the pre-set gain values ​​for different channels are different. If the difference between the preset gain values ​​​​of different channels is small, the signal is calibrated according to the fixed AVC threshold. Finally, the change range of the volume output by the smart terminal is also within the acceptable error range of the human ear. However, the current channel gain settings are becoming more and more refined, and the gain values ​​​​of different channels are also very different. It can be seen that when using After the pre-gain processing is performed on different gain values, and the volume of the signal after the pre-gain is calibrated by using a unified threshold value, it may not be possible to make the volume of the output signal reach the volume output target value, especially when the smart terminal switches channels. At the same time, the final volume played by the smart terminal will still fluctuate

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