BPPA (Band-Pass Phase Adjustment) digital audio processor and sound box processor using same

Abstract

The invention discloses a BPPA (Band-Pass Phase Adjustment) digital audio processor and a sound box processor using the same. The digital audio processor comprises n band-pass filters, n time delayers and an n*1 mixer. In the invention, input audio signals are separated into n paths of audio signals according to different frequency bands through the n band-pass filters; the n paths of audio signals are respectively input into the n paths of time delayers; and signals output by the n paths of time delayers are simultaneously input into the n*1 audio mixer to carry out mixing output. The digital audio processor is suitable for sound box processors with a single loudspeaker, two fractional frequencies, three fractional frequencies or multiple fractional frequencies. Based on the chip design of a DSP (Digital Signal Processor), the processors can be adjusted in a large range and large amplitude, have simple operation and obviously and greatly improve the tone quality performance. In addition, the invention can correct the phase deviation of the loudspeaker and improve the frequency response and the transient response of the loudspeaker, thereby reducing the distortion and greatly improving the tone quality performance of the loudspeaker.

Description

technical field [0001] The present invention relates to a kind of band-pass phase adjustment digital audio processor (BPPA) and the sound box processor using this processor, specifically, relate to a kind of utilizing high-speed DSP (digital signal processing) chip, carry out preprocessing to audio signal, That is to use multiple separated bandpass filters to separate signals of different frequency bands, delay the signals of different frequency bands to realize phase deviation, and then mix the separated signals of different frequency bands to realize the phase adjustment of audio signals of different frequency bands technology, and speaker processors that use it. Background technique [0002] In a sound reinforcement system, the main bottleneck that affects the final sound quality is the distortion of the speaker, including frequency response distortion and phase response distortion. In loudspeaker manufacturing and system sound reinforcement applications, most of the att...

AI Technical Summary

Problems solved by technology

Some use physical methods, such as modifying the design of the speaker box, optimizing the structure of the tweeter horn, etc., which are difficult to adjust and difficult to grasp; some use the method of optimizing the speaker processing circuit, such as optimizing the frequency division circuit design. The adjustment is relatively simple, but the range of adjustment is limited

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