KR19980072471A

KR19980072471A - Car AV System

Info

Publication number: KR19980072471A
Application number: KR1019970007318A
Authority: KR
Inventors: 강병권
Original assignee: 김영귀; 기아자동차 주식회사
Priority date: 1997-03-06
Filing date: 1997-03-06
Publication date: 1998-11-05

Abstract

The present invention relates to an AV system for a vehicle, and an object of the present invention is to provide a vehicle AV system in which a DSP unit is integrally formed in an amplifier of an AV system for a vehicle to realize a realistic sound field in a vehicle.

According to an aspect of the present invention, there is provided an audio / video (AV) head unit including an AV head unit for operating and controlling audio and video, A DSP unit 20 for converting the analog signal into an analog signal and amplifying or varying the frequency characteristic of the analog signal, a signal output from the DSP unit 20 and a signal output from the AV head unit 10, A fix eq u unit 30 which erases noise and the like and fixes a signal generated in accordance with the characteristics of the vehicle, a signal echo canceler 30 which filters low-frequency components of a signal outputted from the DSP unit 20 and a signal outputted from the AV head unit 10 An amplifier unit 50 for amplifying signals output from the LPF unit 40, the pixecunit 30 and the LPF unit 40 and a speaker 60 for outputting the amplified signal from the amplifier unit 50 Made up Even within the vehicle, you can enjoy realistic sound and video with AV system.

Description

Car AV System

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an AV system for a vehicle, and more particularly, to a vehicle AV system in which a DSP unit is integrally formed in an amplifier of an AV system for a vehicle to realize a realistic sound field in a vehicle.

Nowadays, due to the development of electronic devices, there is a lot of dependence on control of electronic devices to improve the performance of automobiles. In particular, various sensors are used to improve the engine performance, resulting in optimum engine efficiency, thus increasing the reliability of the vehicle. In addition, the development of such electronic devices has been applied not only to actual engine driving but also to safety devices for safety of the driver, various additional devices for convenience of driving, and traveling devices.

In particular, for convenience of the driver and a comfortable driving condition, the audio system is installed and a radio for listening to various information or music transmitted from a broadcasting station, and a cassette tape recorder or a CD player for listening to a cassette tape or a CD .

In addition, there is an increasing number of vehicles that are equipped with an LD player that allows users to view video, TV, and the like or to view a laser disk in order to enjoy additional images.

It is called an audio-visual system (AV system) by combining an audio system and a system for viewing video or TV. When listening to music or watching videos with this AV system, the audio signal is amplified and output as it is, so you can not feel the feeling of listening to music or watching the video. In other words, when listening to music played at a concert hall or at a jazz club played on a stadium or the like, it is impossible to feel the sense of presence that allows the user to feel like listening to music even if he does not actually go to the concert hall or go to the stadium .

In order to create such a feeling of presence, a DSP unit (Discrete Signal Processing Unit) is mounted, which is not applied to a vehicle, but also has a problem in that installation space is limited in the assembly space.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide an AV system for an automotive AV system which realizes a field sound field by reducing an assembly space by saving circuit space by integrating an amplifier unit and a DSP unit .

1 is a block diagram of a vehicle AV system in which an amplifier and a DSP unit according to the present invention are integrated.

Description of the Related Art [0002]

10: AV head unit 20: DSP unit

30: Fixed IQ unit 40: LPF unit

40: Amplifier unit 50: Speaker

According to an aspect of the present invention, there is provided an audio / video (AV) head comprising: an AV head unit for operating and controlling audio and video; and a control unit for converting the audio signal into a digital signal, A DSP unit for converting, outputting, amplifying or varying the frequency characteristics; a DSP unit for receiving a signal outputted from the DSP unit and a signal outputted from the AV head unit to erase noises generated during the mode conversion, An LPF unit (Low Pass Filter Unit) for filtering the low frequency components of the signal output from the DSP unit and the signal output from the AV head unit; an amplifier for amplifying the signal output from the FAX unit and the LPF unit; And a speaker for outputting an amplified signal from the amplifier unit.

Hereinafter, the operation of the present invention will be described. The signal output from the AV head unit is converted into a digital signal from the DSP unit, and the signal is processed to be realistic, or is varied or amplified according to the frequency characteristics, mixed with the originally outputted signal, and amplified. Also, before amplifying the acoustic signal, it preprocesses the signal generated according to the characteristics of the vehicle or performs processing for emphasizing the bass sound.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, the present embodiments are not intended to limit the scope of the present invention, but merely as examples.

1 is a circuit configuration diagram of a vehicle AV system showing an embodiment of the present invention. 1, an AV head unit 10 for operating and controlling audio and video, and the like. The control signal outputted from the AV head unit 10 is inputted through a communication line, receives an output of a voice signal, A DSP unit 20 for converting the signal into a signal, converting the signal into an analog signal, outputting the amplified signal or varying the frequency characteristic thereof, and a signal output from the DSP unit 20 and a signal output from the AV head unit 10 A voice signal output from the DSP unit 20 and a voice output from the AV head unit 10. The voice signal output from the DSP unit 20 and the voice signal output from the AV head unit 10, An amplifier unit 50 for amplifying a signal output from the FAQ unit 30 and the LPF unit 40 and a signal amplifying unit 50 for amplifying the signal amplified by the amplifier unit 50. The LPF unit 40 filters out low- Print It comprises a speaker (60).

The speaker 60 includes a speaker 60 for outputting a signal output from the fixture unit 30 and a woofer speaker 602 for outputting a signal output from the LPF unit 40.

The operation of the present embodiment will be described as follows. When the user selects a variety of situations, that is, a sense of presence of a concert hall, a stadium or a jazz club, the selected data is input to the DSP unit 20 via the communication line and reproduced by the AV head unit 10 The DSP unit 20 receives the output audio signal and converts the output audio signal into digital, processes it, amplifies it, or converts the processed signal into an analog signal, And mixes it with the signal output from the AV head unit 10. [

The mixed signal is used to fix the frequency characteristics generated by the characteristics of the vehicle such as amplification of a specific frequency of the vehicle by sound absorption by the seat or by a special characteristic of the vehicle by the fix eq u unit 30 and control of the DSP unit 20 And amplifies the processed voice signal to output it to the speaker 60.

Then, the low frequency signal is amplified and amplified before being amplified so as to utilize the effect of the bass sound, and the amplified sound is outputted to the woofer speaker 602, so that the bass sound is saved.

As described above, the present invention is advantageous in that an amplifier unit and a DSP unit are integrally formed and installed in a vehicle AV system, thereby saving circuit space and reducing assembly space. In addition, the installation of the DSP unit has the advantage of improving the sound quality of the car AV system and realizing the field sound field.

Claims

An AV head unit 10 for operating and controlling audio and video,

A DSP unit 20 for converting a voice signal into a digital signal according to a control signal output from the AV head unit 10, converting the digital signal into an analog signal, amplifying the analog signal,

A fix eq u unit 30 which receives signals output from the DSP unit 20 and the AV head unit 10 to erase noises generated during mode conversion and fix signals generated according to characteristics of the vehicle,

An LPF unit 40 for filtering the low frequency components of the signals output from the DSP unit 20 and the AV head unit 10,

An amplifier unit 50 for amplifying the signals outputted from the fixture unit 30 and the LPF unit 40,

A speaker 60 for outputting a signal amplified by the amplifier unit 50,

Wherein the AV system comprises: