Audio signal balance processing method and device and processing circuit

An audio signal and processing circuit technology, applied in transducer circuits, electrical components, sensors, etc., can solve the problem of signal phase shift of two decoders, achieve fast information transmission, accurate decoding, and ensure timely communication.

Pending Publication Date: 2020-07-17
FIIO ELECTRONICS TECH
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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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  • Audio signal balance processing method and device and processing circuit
  • Audio signal balance processing method and device and processing circuit
  • Audio signal balance processing method and device and processing circuit

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Embodiment Construction

[0029] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0030] like figure 1 As shown, in the processing circuit of the prior art, the main clock signals of decoder 1 and decoder 2 come from an external 49.152M crystal oscillator, and the I2S selection switch receives the I2S signal from the Bluetooth chip and decoder 3, and selects the output One I2S signal (including bit clock signal, left and right channel clock signal and original audio data), the bit clock signal, left and right channel clock signal and original audio data output by the I2S selection switch are directly output to decoder 1, and the I2S selection switch outputs The output bit clock signal and the left and right channel clock signals are directly output to the decoder 2, while the original audio signal needs to pass through the inverter first, and the inverted original audio signal is...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00
CPCH04R3/00
Inventor 毛辛晨王祝伦
Owner FIIO ELECTRONICS TECH
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