KR970038829A - Audio output device of car and its method - Google Patents

Abstract

The present invention relates to an audio output device of a vehicle and a method thereof for performing sound processing using a digital signal processor and providing an optimum sound balance to a rider with the addition and improved arrangement of speakers.

The present invention generates a key input unit for inputting an output selection signal of each speaker, a control signal for signal source selection and speaker output selection according to key operation of the key input unit, correction of signal levels, addition of reverberation components, and frequency. A microcomputer for generating a control signal for characteristic correction, a switching unit for switching and outputting only one signal source among a plurality of signal sources according to a signal source selection control signal output from the microcomputer, and an analog audio signal output from the switching unit Analog / digital converter for converting to digital audio signal, first digital signal processor for correcting dynamic range of digital audio signal output from analog / digital converter, and level control of audio signal output from first digital signal processor And a second digital signal processor for performing parametric equalizer processing; Third to fifth digital signal processors for adding reverberation and initial reflection to the digital audio signal output from the signal processor, and first digital converters for converting the digital audio signals output from the third to fifth digital signal processors, respectively, into analog audio signals. To third and third digital / analog converters, first and second amplifiers for amplifying and outputting audio signals output from the first digital / analog converter to the front left and right speakers, and outputting from the second digital / analog converter. A third and fourth amplifiers for amplifying the audio signal to be output to the rear first and second left speakers, and amplifying the audio signal output from the third digital / analog converter to the rear first and second right speakers. The fifth and sixth amplifying units are sent.

Description

Automobile audio output device and method

Since this is an open matter, no full text was included.

2 is a block diagram of an audio output device for a vehicle according to the present invention.

3 is a plan view showing an example of speaker arrangement according to the present invention.

4 is a plan view showing another arrangement example of the speaker according to the present invention.

5 is a flowchart of an audio output method of a vehicle according to the present invention.

Claims (2)

A key input unit for inputting an output selection signal of each speaker, and a control signal for signal source selection and speaker output selection according to key operation of the key input unit are generated, and signal level correction, reverberation component addition, and frequency characteristic correction are performed. A digital signal for outputting a microcomputer for generating a control signal for the control unit, a switching unit for switching and outputting only one signal source among a plurality of signal sources according to the signal source selection control signal output from the microcomputer, and an analog audio signal output from the switching unit. An analog / digital converter for converting to an audio signal, a first digital signal processor for correcting a dynamic range of the digital audio signal output from the analog / digital converter, and a level of an audio signal output from the first digital signal processor A second digital signal processor for performing control and parametric equalizer processing; A third to fifth digital signal processing unit for adding reverberation and initial reflection sound to the digital audio signal output from the second digital signal processing unit, and the digital audio signals output from the third to fifth digital signal processing units as analog audio signals, respectively. First to third digital / analog converters for converting the first and second amplifiers for amplifying an audio signal output from the first digital / analog converter and outputting the audio signal to the front left and right speakers FL and FR; And a third and fourth amplifiers for amplifying the audio signal output from the second digital / analog converter and outputting the amplified audio signal to the rear first and second left speakers BL1 and BR1, and the third digital / analog converter. And a fifth and sixth amplifying units configured to amplify the audio signal output from the first and second rear speakers (BL2, BR2) and amplify the audio signal. Video output device. A first step of searching for the presence or absence of input of an output position key of the speaker with the output of each speaker set in a basic direction; A second process of controlling voice output to all speakers when the search key is a driver-oriented key; A third process of controlling the voice to be output only to the left and right speakers of the driver's seat and the first and second right speakers of the rear seat when the search key is the rear right dominant key; And a fourth process of controlling the voice to be output only to the left and right speakers of the driver's seat and the first and second left speakers of the rear seat when the search key is the left and right keys of the rear seat. ※ Note: The disclosure is based on the initial application.