Audio signal balance processing method and device and processing circuit

Abstract

The invention provides an audio signal balance processing method and device and a processing circuit. The method comprises the following steps that: a processing chip receives an audio signal, replaces second audio data of a right channel with inverted data of first audio data of a left channel, and replaces the first audio data with inverted data of the second audio data to respectively obtain first inverted data and second inverted data; the processing chip sends the first audio data and the first inverted data to a first decoder, and sends the second audio data and the second inverted datato a second decoder; the first decoder outputs a left channel signal and an inverted signal of the left channel signal after decoding, and the second decoder outputs a right channel signal and an inverted signal of the right channel signal after decoding. According to the embodiment of the invention, the single decoder can output single-channel signals with opposite polarities, the problem of phase shift in the prior art is solved, and the channel separation degree of balanced audio signals is increased.

Description

technical field [0001] The present application relates to the technical field of audio processing, and in particular, to a method, device and processing circuit for balanced processing of audio signals. Background technique [0002] Balanced output is widely used in professional audio field. The principle of balanced output is roughly that the audio data in the audio signal is reversed to obtain data with opposite polarity, and then sent to two decoders respectively to obtain analog signals with opposite phases. During transmission, each channel uses two signal lines to be responsible for the transmission of audio signals, one of which transmits the original audio signal corresponding to the channel, and the other transmits the inverted signal of the original audio signal of the channel. [0003] There are some decoders in the prior art, such as the ES9218P and MS4344 decoders. These decoders do not have an inversion function inside and cannot output a single channel signal...

AI Technical Summary

Problems solved by technology

like figure 1 Due to the time difference in the inversion processing of the inverting device, there will be a signal phase shift between the two decoders, that is, the final output analog signal R+ (right channel signal) and R- (right channel signal) There is a phase difference between the anti-phase signal of the left channel signal), and there is a phase difference between the output analog signals L+ (left channel signal) and L- (the anti-phase signal of the left channel signal)

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