KR20090018369A - Common antenna car audio system and control method - Google Patents

Common antenna car audio system and control method Download PDF

Info

Publication number
KR20090018369A
KR20090018369A KR1020070082764A KR20070082764A KR20090018369A KR 20090018369 A KR20090018369 A KR 20090018369A KR 1020070082764 A KR1020070082764 A KR 1020070082764A KR 20070082764 A KR20070082764 A KR 20070082764A KR 20090018369 A KR20090018369 A KR 20090018369A
Authority
KR
South Korea
Prior art keywords
antenna
radio
signal
car audio
reception mode
Prior art date
Application number
KR1020070082764A
Other languages
Korean (ko)
Inventor
소병춘
Original Assignee
주식회사 대우아이에스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 대우아이에스 filed Critical 주식회사 대우아이에스
Priority to KR1020070082764A priority Critical patent/KR20090018369A/en
Publication of KR20090018369A publication Critical patent/KR20090018369A/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
    • H01Q1/3216—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used where the road or rail vehicle is only used as transportation means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/11—Aspects of broadcast communication characterised by the type of broadcast system digital multimedia broadcasting [DMB]

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

A common antenna car audio system and a control method are provided to cut down on additional expense according to the installation of antenna by allowing an additionally mounted device to share the common antenna equipped in the vehicle. A common antenna car audio system comprises an antenna(101) receiving radio and digital broadcast, an antenna switch(102) which switches the signal received through the antenna selectively between two paths, a microcomputer(103) controlling the path selection of the antenna switch, and an antenna jack connection part(105) connecting one path of the antenna switch to an external device.

Description

Antenna Sharing Car Audio System and Control Method {COMMON ANTENNA CAR AUDIO SYSTEM AND CONTROL METHOD}

The present invention relates to an antenna shared car audio system and a control method, and in particular, an antenna capable of receiving an FM / AM radio broadcast of a built-in car audio and a digital broadcast of an externally mounted external device using one antenna installed in a vehicle. The present invention relates to a shared car audio device and a control method.

Recently, a number of devices installed in vehicles, such as TV receivers, satellite digital broadcast receivers, and terrestrial digital broadcast receivers, are increasing. These terminals may be mounted in a built-in form before leaving the vehicle, but are more often mounted after the vehicle leaves the vehicle user's preference.

A terminal mounted in a built-in form before shipment is used to share a single antenna installed in the vehicle, while the additional terminal is installed according to the user's choice after shipment, using a separate antenna according to the terminal. Digital broadcasting receivers using a frequency band of 180-230 MHz are equipped with an antenna of 40 cm in length. The installation of additional antennas internally and externally is not only aesthetically pleasing but also incurs additional costs for antenna installation.

As described above, if an additional terminal is installed according to a user's selection, a separate antenna should be used. Thus, additionally installing the antenna internally and externally may not be aesthetically pleasing and additional cost may be incurred in installing the antenna.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide an antenna shared car audio system of a vehicle so that an additionally installed digital broadcasting terminal can share one antenna provided in the vehicle.

In order to achieve the above object, the antenna sharing car audio system according to the present invention includes an antenna for receiving radio and digital broadcasting, an antenna switch for selectively switching and transmitting a signal received from the antenna in two paths, and It is characterized in that it comprises a microcomputer for controlling the path selection, and an antenna jack connecting portion for connecting one path of the antenna switch to an external device.

Here, the radio and digital broadcast is a system for selecting one of two broadcasts and listening to it. One path of the antenna switch is connected to a tuner inside the car audio, and the other path is connected to an external device connected to the antenna jack connection unit. It is characterized by.

In this case, the external device preferably includes a DM terminal and a TV receiver.

According to another feature of the present invention, an antenna for receiving radio and digital broadcast, an impedance matching unit for removing reflected waves by impedance matching the received signal of the antenna, and receiving the impedance matched signal to remove noise and only signal And an amplifier for amplifying and an antenna jack connecting portion for transmitting a received signal to an external device, wherein the amplifier supplies the signal to a radio tuner in the main body and the antenna jack connecting portion. In this case, the radio broadcast and the digital broadcast may be simultaneously received.

According to still another aspect of the present invention, there is provided a method for receiving a wireless signal, receiving a user selection, determining a reception mode, and if the determined reception mode is a radio mode, transmitting the wireless signal to a radio tuner inside a car audio body. And if the determined reception mode is an external device mode, transmitting the wireless signal to the antenna jack connection unit.

The reception mode may further include transmitting the received radio signal to the radio tuner and the antenna jack connection unit when the reception mode is a simultaneous reception mode. The step of determining a reception mode by receiving the user selection may include: Recognizing an input reception mode, and switching a path to the radio signal according to the reception mode.

The antenna sharing car audio system and control method according to the present invention can share a single antenna installed in a vehicle to listen to the radio broadcast of a built-in car audio and to watch a broadcast of a digital broadcasting terminal installed separately.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following embodiments are provided to those skilled in the art to fully understand the present invention, can be modified in various forms, the scope of the present invention is limited to the embodiments described below no.

1 is a block diagram illustrating an antenna common car audio system according to a first embodiment of the present invention. As shown in FIG. 1, an antenna 101 for receiving radio and digital broadcasts, an antenna switch 102 for selectively switching a signal received from the antenna to two paths, and a path selection of the antenna switch Microcom 103 for controlling the, and the radio tuner 104 receives the signal of the antenna switch 102 in the radio mode, an antenna jack connecting unit 105 and an antenna jack for connecting one path of the antenna switch to an external device It consists of 106.

Here, the first embodiment is a case where a broadcast through one terminal is received at one time without driving the car audio and the digital broadcasting terminal at the same time.

The antenna 101 is installed outside the vehicle and resonates with radio and digital broadcast frequency bands to receive radio signals of the corresponding frequency bands.

The antenna switch 102 receives a signal received by the antenna 101 and switches it to selectively output two paths. Here, the two paths, one path is a path for receiving a radio broadcast by transmitting a signal to the radio tuner 104 of the car audio, the other path is a digital broadcast terminal (not shown) via the antenna jack connection 105 A path for receiving digital broadcast by transmitting a signal. In this case, the switching of the antenna switch 102 is performed by SW_SEL which is a control output signal of the microphone 103.

The microcomputer 103 is the central processing unit of the car audio, and SW_SEL, which is one of the control outputs of the microcomputer 103, controls the antenna switch 102. For example, if the SW_SEL signal is high, the radio path is selected, and if the SW_SEL signal is low, the digital broadcast reception path is selected.

The radio tuner 104 is connected to one of two outputs of the antenna switch 102 and receives a radio broadcast signal and extracts only a signal of a selected channel. Since the output signal of the radio tuner 104 is then passed to a general radio receiving circuit, the presentation of the component is omitted.

The antenna jack connector 105 is connected to one of the two outputs of the antenna switch 102 and transmits the input signal to the antenna jack 106.

One end of the antenna jack 106 is connected to the antenna jack connecting portion 105 and the other end is a connector cable connected to an external digital broadcasting terminal. The cable is impedance-matched with the transmitter to minimize signal attenuation. Since the shape of the antenna jack 106 may vary depending on the digital broadcasting terminal, the antenna jack 106 may have various types so as to interface with various digital broadcasting terminals.

2 is a block diagram illustrating an antenna common car audio system according to a second embodiment of the present invention. As shown in FIG. 2, an antenna 101 for receiving radio and digital broadcasts, an impedance matching unit 202 for removing reflected waves by impedance matching the received signal of the antenna, and receiving the impedance matched signal An amplifier 203 for removing noise and amplifying only a signal, a radio tuner 104 for receiving a signal transmitted from the amplifier 203, and an antenna jack for transmitting a signal transmitted from the amplifier 203 to an external device. It is composed of a connecting portion 105 and the antenna jack 106.

The second embodiment is an example of a system that always operates the radio, such as the RDS radio in Europe. European Radio Data System (RDS) radio broadcasting is a radio data broadcasting system that can receive various data messages such as emergency information through the display of radios installed in automobiles. RDS broadcasting broadcasts data such as traffic information in the FM broadcasting frequency band. That is, the second embodiment is a form of receiving a digital broadcast and simultaneously receiving a radio broadcast in the form of data.

The antenna 101 is installed outside the vehicle and resonates with radio and digital broadcast frequency bands to receive radio signals of the corresponding frequency bands.

The impedance matching unit 202 equally matches the impedance with the transmitting side to minimize the reflected wave and maximize the power of the received signal.

The amplifier 203 receives the output signal of the impedance matching unit 202 and suppresses noise and amplifies the strength of the attenuated signal during transmission.

Here, the output signal of the amplifier 203 is supplied to the radio tuner 104 and the antenna jack connecting portion 105 in the main body.

The radio tuner 104 is an element that selectively outputs only the radio wave of the channel by tuning to the frequency of the selected channel among the radio reception signals. The radio tuner 104 receives the output of the amplifier 203 and delivers it to the internal radio receiver circuit of the car audio.

The antenna jack connector 105 receives the signal output from the amplifier 203 and delivers it to an external device. The antenna jack connection unit 105 is connected to the antenna jack 106 to transmit a signal received to an external digital broadcasting terminal.

One end of the antenna jack 106 is connected to the antenna jack connecting portion 105, and the other end is connected to an external digital broadcasting terminal to transmit a digital broadcast signal. Since the shape of the antenna jack 106 may vary depending on the digital broadcasting terminal, the antenna jack 106 may have various types so as to interface with various digital broadcasting terminals.

3 is a flowchart illustrating an operation procedure of an antenna shared car audio system according to a first embodiment of the present invention. A description with reference to FIG. 3 is as follows.

First, a radio signal is received via an antenna. Of course, it is preferable to turn on the power of the car audio or digital broadcasting terminal and select a channel to be listened to.

In the initial state, the antenna switch 102 is in radio mode and the signal received at the antenna 101 is delivered to the radio tuner 104.

Here, the radio mode refers to a mode for receiving radio broadcast through car audio.

At this time, if not in the radio mode (S302), in order to receive the digital broadcast antenna jack 106 is connected to an external device such as a digital broadcast terminal (S303). Of course, connecting the external device may be connected to the external device before this step. Here, the selection of the radio mode or the DMB mode is preferably operated through key input through a user.

Subsequently, the microcomputer 103 controls the control signal SW_SEL of the antenna switch 102 to change from the radio mode to the DMB mode (S304).

Here, the DMB mode is a mode in which a signal received from the antenna 101 is transmitted to an external device via the antenna switch 102.

Then, the antenna reception signal is transmitted to the external digital broadcasting terminal through the antenna jack 106 (S305). That is, the output signal of the antenna switch 102 is transmitted to the external digital broadcasting terminal via the antenna jack connection unit 105 and the antenna jack 106.

Now, the user receives the digital broadcast through the digital broadcast terminal (S306).

On the other hand, if the determination result in the radio mode (S302), the antenna switch 102 maintains the initial state and the signal received from the antenna 101 is transmitted to the radio tuner 104 (S307).

Then, the user can listen to the radio broadcast (S308).

The configuration of the present invention has been described above through the preferred embodiments and the accompanying drawings. However, these are only examples and are not used to limit the scope of the present invention. Those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this, and the true scope of protection of the present invention should be determined by the technical spirit of the appended claims. .

1 is a block diagram illustrating an antenna shared car audio system according to a first embodiment of the present invention.

2 is a block diagram illustrating an antenna shared car audio system according to a second embodiment of the present invention.

3 is a flowchart illustrating an operation procedure of an antenna shared car audio system according to a first embodiment of the present invention.

Description of the main parts of the drawing

101: antenna 102: antenna switch

103: micom 104: radio tuner

105: antenna jack connection 106: antenna jack

Claims (9)

An antenna for receiving radio and digital broadcasts, An antenna switch for selectively switching and transmitting a signal received from the antenna in two paths; A microcomputer for controlling the path selection of the antenna switch; An antenna jack connecting portion connecting one path of the antenna switch to an external device Antenna sharing car audio system comprising a. The method of claim 1, The radio and digital broadcast is an antenna shared car audio system, characterized in that for selecting any one of the two broadcasts. The method of claim 1, One path of the antenna switch is connected to the tuner inside the car audio, The other path is an antenna shared car audio system, characterized in that connected to the external device connected to the antenna jack connection. The method of claim 1, The external device is an antenna shared car audio system, characterized in that it comprises a DM terminal and a TV receiver. An antenna for receiving radio and digital broadcasts, An impedance matching unit for removing reflected waves by impedance matching the received signal of the antenna; An amplifier which receives the impedance matched signal, removes noise, and amplifies only the signal; Includes an antenna jack connection for transmitting a received signal to an external device, And the amplifier supplies the signal to the radio tuner and the antenna jack connection in the main body. The method of claim 5, And simultaneously receiving the radio broadcast and the digital broadcast. Receiving a wireless signal, Determining a reception mode by receiving a user selection; Transmitting the radio signal to a radio tuner inside a car audio body if the determined reception mode is a radio mode; And transmitting the wireless signal to the antenna jack connector if the determined reception mode is an external device mode. The method of claim 7, wherein If the reception mode is a simultaneous reception mode And transmitting the received radio signal to the radio tuner and the antenna jack connection unit. The method of claim 7, wherein Determining the reception mode by receiving the user selection, Recognizing a reception mode input by the user; Switching a path to the radio signal according to the reception mode Antenna sharing car audio control method, characterized in that.
KR1020070082764A 2007-08-17 2007-08-17 Common antenna car audio system and control method KR20090018369A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070082764A KR20090018369A (en) 2007-08-17 2007-08-17 Common antenna car audio system and control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070082764A KR20090018369A (en) 2007-08-17 2007-08-17 Common antenna car audio system and control method

Publications (1)

Publication Number Publication Date
KR20090018369A true KR20090018369A (en) 2009-02-20

Family

ID=40686648

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070082764A KR20090018369A (en) 2007-08-17 2007-08-17 Common antenna car audio system and control method

Country Status (1)

Country Link
KR (1) KR20090018369A (en)

Similar Documents

Publication Publication Date Title
US7260356B2 (en) Method and apparatus for wirelessly coupling a source signal to a radio frequency receiver
EP1608083B1 (en) Diversity with identification of specific antenna properties and evaluation thereof
EP1863193B1 (en) Digital satellite receiver and method for switching among multiple receiver antennas using diversity circuitry
US20120115421A1 (en) Apparatus and method for automatic replacement of wireless link
JP2005159827A (en) Portable telephone receiving a plurality of broadcast waves
EP1883164B1 (en) Wireless communication device for receiving mobile broadcasting signal and transmitting/receiving bluetooth signal with single antenna
EP2560236B1 (en) Apparatus to communicate multiple signals from multiple antennas on a single cable.
US8285209B2 (en) Short range FM modulator/transmitter and system incorporating same
KR100584438B1 (en) Mobile station including the external antenna
US20050197083A1 (en) System and method for the adaptation of received digital data
US20070298710A1 (en) Audio interfaces
KR20090018369A (en) Common antenna car audio system and control method
US20110124288A1 (en) Apparatus and method for automatic wireless link replacement
WO2009058139A1 (en) Short range fm modulator/transmitter and system incorporating same
US20030036402A1 (en) Cellular broadcast receiver
JP2008312014A (en) On-vehicle digital broadcast receiver
US20060166632A1 (en) Apparatus and method for automatically tuning frequency
US20070263557A1 (en) Apparatus for eliminating interference from broadcast signals with satellite signals
KR101491155B1 (en) Apparatus for Digital Multimedia Broadcasting and method of controlling the thereof
JPH11331000A (en) Fm broadcast receiver and fm multiplex receiver
KR200421705Y1 (en) Dmb antenna module
EP1662681A1 (en) Receiver integrated satellite digital audio radio antenna system
KR20080010943A (en) Computer system built-in multimedia signal receiver
JP2003347949A (en) Onboard radio receiver
WO2010114064A1 (en) Conversion system, conversion device

Legal Events

Date Code Title Description
N231 Notification of change of applicant
WITN Withdrawal due to no request for examination