KR20000008237A - Broadcasting receiving device and method using two tuners - Google Patents

Abstract

PURPOSE: A broadcasting receiving device is provided to move the frequency memorized which has a good receiving state without key operation while running after memorizing the broadcasting frequency to the region to move using two tuners. CONSTITUTION: A broadcasting receiving method comprises the steps of: receiving by inputting the frequency transmitted from a broadcasting station of the present position in the 1st tuner(100) by installing two tuners in a car-audio; inputting the frequency transmitted from the broadcasting station of the area to move in the 2nd tuner; a driver or a user doesn't have to set the frequency at every moving of the area by automatically moving the receiving frequency into the 2nd tuner if the receiving sensitivity is decreased in the state of memorized in the microcomputer(900).

Description

Broadcast receiving apparatus and method using two tuners

The present invention relates to a broadcast receiving apparatus of a car audio, and in particular, to store a broadcasting frequency of a region to be moved by using two tuners, and when the movement state is better than the current broadcasting frequency without a key operation when the movement is automatically memorized. The present invention relates to a broadcast receiving apparatus and method using two tuners to move in frequency.

In the conventional broadcast receiving apparatus using a single tuner, since the frequency output from the same station varies depending on the region, when the driver moves from the A region to the B region, the reception of the broadcast that was listening at the place where the driver first started moving becomes worse. There was a problem in finding a frequency suitable for a moving area.

The present invention is to solve the above-mentioned conventional problems, in particular, two tuners in the car audio to store the frequency of the moving place, one tuner receives the current local broadcast, the other one Tuner uses the two tuners that keep receiving the frequency that is memorized and compare the received state with the current one. A broadcast receiving device and method are provided.

In order to achieve the above object, a broadcast receiving apparatus using two tuners of the present invention comprises: a first tuner unit which receives and receives a frequency transmitted from a broadcasting station before moving; A second tuner unit for receiving and receiving a frequency transmitted from a broadcasting station to be moved; A first frequency amplifier which receives the frequency received by the first tuner and separates intermediate frequency amplification, noise cancellation, and a voice signal; A first capacitor which receives the voice signal output from the first frequency amplifier and removes the DC voltage and outputs the AC voltage; A first reverse voltage prevention diode for preventing an AC voltage output from the first capacitor from being reversely discharged; A second frequency amplifier receiving the frequency received by the second tuner and performing the same operation as the first frequency amplifier; A second condenser that receives an audio signal output from the second frequency amplifier and performs the same operation as that of the first condenser; A second reverse voltage prevention diode which operates in the same manner as the first reverse voltage prevention diode so that the AC voltage output from the second capacitor is not discharged backward; After receiving the frequency output from the first tuner unit and outputting a control signal, receiving and storing the frequency output from the second tuner unit and comparing the signal-metameters of the first and second tuner units to generate a control signal. A microcomputer for outputting; A first filter unit receiving a control signal output from the microcomputer and applying a set voltage suitable for a frequency such that the first tuner unit can receive a frequency of a desired band; A second filter unit receiving a control signal output from the microcomputer and applying a set voltage suitable for a frequency such that the second tuner receives a frequency of a desired band; A relay unit receiving the control signal output from the microcomputer and selecting and outputting signals output from the first and second frequency amplifiers; The relay unit may include a transistor configured to perform a switching operation so as to receive an input of a control signal output from the microcomputer and perform an on / off operation.

On the other hand, the broadcast receiving method using the two tuners of the present invention includes a first tuner usage checking step (S10) for checking whether the broadcast is currently received using the first tuner; A memory input determination step (S20) of determining whether a memory key is input when it is checked whether the first tuner unit is being used in the first tuner use checking step (S10); A second tuner operation on step (S30) of returning to the first tuner use checking step (S10) if the memory key is not input in the memory input determination step (S20), and a second tuner unit operating if the memory key is input; A signal-meta output determination step (S40) of determining whether a signal-meta is output from the second tuner unit when the second tuner unit operates in the second tuner operation on step (S30); If the signal-meta is not output in the signal-meta output determination step (S40), the signal returns to the second tuner operation on step (S30). A signal-meta comparison determination step (S50) of determining whether the level of the signal-meta output from the second tuner unit is high; If the signal-meta level output from the second tuner unit is not higher than the signal-meta level output from the first tuner unit in the signal-meta comparison determination step (S50), the process returns to the second tuner operation on step (S30). And, if high, the control signal output step (S60) for outputting a control signal for driving the relay in the microcomputer; A transistor on step (S70) in which a transistor is operated when a control signal is output in the control signal output step (S60); A relay driving step (S80) in which a relay is operated when the transistor is turned on in the transistor on step (S70); When the relay is driven in the relay driving step (S80), it comprises a second tuner listening step (S90) for listening to the signal output from the second tuner unit.

1 is a block diagram showing a broadcast receiving apparatus using two tuners according to an embodiment of the present invention;

2 is a flowchart illustrating a broadcast reception method using two tuners according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: first tuner portion 200: second tuner portion

300: first frequency amplifier 400: first capacitor

500: first reverse voltage prevention diode 600: second frequency amplifier

700: second capacitor 800: second reverse voltage prevention diode

900: microcomputer 1000: first filter unit

1100: second filter unit 1200: relay unit

1300: Transistor

Hereinafter, the above-described contents will be described in detail through an embodiment according to the present invention.

As shown in FIG. 1, first, the first tuner unit 100 receives and receives a frequency transmitted from a broadcasting station (not shown) before the vehicle moves, and the second tuner unit 200 receives the frequency. Receives and receives the frequency transmitted from the broadcasting station to be moved to another place, the first frequency amplifier 300 receives the frequency received from the first tuner unit 100, the intermediate frequency amplification, noise removal and voice signal Disconnect.

In addition, the first condenser 400 receives the voice signal output from the first frequency amplifier 300 and removes the DC voltage and outputs only the AC voltage. The AC voltage output from the first condenser 400 is not discharged in reverse, and the second frequency amplifier 600 receives the frequency received from the second tuner 200 and is the same as the first frequency amplifier. It works.

Meanwhile, the second capacitor 700 receives the voice signal output from the second frequency amplifier 600 and performs the same operation as that of the first capacitor 400. In the second reverse voltage prevention diode 800, The same operation as the first reverse voltage prevention diode 500 is performed so that the AC voltage output from the second capacitor 700 is not reversely discharged, and the microcomputer 900 outputs the frequency output from the first tuner unit 100. Receives and outputs a control signal, receives and stores the frequency output from the second tuner unit 200, and compares the signal-metadata of the first and second tuner units 100 and 200 to control the signal. Will print

In addition, the first filter unit 1000 receives a control signal output from the microcomputer 900 and applies a setting voltage suitable for the frequency so that the first tuner unit 100 can receive a frequency of a desired band. The second filter unit 1100 receives a control signal output from the microcomputer 900 and applies a setting voltage suitable for the frequency so that the second tuner 200 can receive a frequency of a desired band.

In addition, the relay unit 1200 receives a control signal output from the microcomputer 900 and selects and outputs the signals output from the first and second frequency amplifiers 300 and 600, and the transistor 1300. In the present embodiment, the switching unit is configured to receive the control signal output from the microcomputer 900 so that the relay unit 1200 can perform an on / off operation.

Hereinafter, an operation process of a broadcast reception device using two tuners configured as described above will be described.

When a driver or a user rides in a car and wants to listen to a radio by receiving a frequency transmitted from a broadcasting station (not shown) while moving from Seoul to Daejeon, for example, a frequency transmitted from a Seoul broadcasting station before moving initially is received. When the first tuner unit 100 receives and outputs the received frequency, the first tuner unit 100 receives the frequency received from the first frequency amplification unit 300 to separate the intermediate frequency amplification, noise removal and speech signal Print it out.

In addition, when the audio signal output from the first frequency amplifier 300 is input from the first condenser 400 and the DC voltage is removed and the AC voltage is output, the AC output from the first condenser 400 is output. The first reverse voltage prevention diode 500 prevents the voltage from being reversed.

On the other hand, if the frequency of the competitive broadcast station that the user wants to move by using the second tuner unit 200 is set in advance, the second tuner 200 receives the frequency transmitted from the competitive broadcast station and outputs it, The second frequency amplifier 600 receives the frequency received from the second tuner unit 200 and separates the intermediate frequency amplification, noise removal, and the voice signal, and outputs the voice signal output from the second frequency amplifier 600. Is input from the second capacitor 700 to remove the DC voltage and outputs the AC voltage.

In addition, the second reverse voltage prevention diode 800 prevents the AC voltage output from the second capacitor 700 from being reversely discharged and prevents the frequency output from the first tuner unit 100 from the microcomputer 900. When the control signal is output from the control unit, the control signal output from the microcomputer 900 is inputted and driven by the relay unit 1200, and only the broadcasting frequency received from the first tuner unit 100 is driven by the driver or user. Can listen.

At this time, for example, when the vehicle arrives at Daejeon through Seoul, when the frequency received by the second tuner unit 200 is a high-quality frequency without noise, the microcomputer 900 receives the second tuner unit 200. After receiving and storing the frequency output from the) and compares the signal-metameter output from the first, second tuner unit 100, 200 and outputs a control signal, and outputs from the microcomputer 900 The driver or user listens only to the broadcast frequency received from the second tuner unit 200 while the control signal is input from the transistor 1300 and the relay unit 1200 is grounded with the second frequency amplifier 600. Driven to do so.

In addition, the control signal output from the microcomputer 900 is input from the capacitor 1001 and the first transistor 1002 and the second transistor 1003 of the first filter unit 1000 to remove noise and amplify the voltage. In addition, the second filter unit 1100 receives the control signal output from the microcomputer 900 from the condenser 1101 and the third and fourth transistors 1102 and 1103 in the same manner as the first filter unit 1000. Noise reduction and voltage amplification are applied to the set voltage according to the frequency to receive the set frequency transmitted from the broadcasting station.

Meanwhile, in the broadcast receiving method using the two tuners of the present invention, by checking whether the broadcast is currently received using the first tuner unit 100 (S10), the first tuner unit in the first tuner use checking step (S10). If it is confirmed that 100 is being used, it is determined whether the user inputs the memory key among the car audio setting keys attached to the front of the inside of the vehicle (not shown) (S20), and the memory key in the memory input determination step (S20) If no input is made, the process returns to the first tuner use checking step (S10), and if input, the second tuner unit 200 operates (S30).

In addition, when the second tuner unit 200 operates in the second tuner operation on step (S30), it is determined whether a signal-meta is output from the second tuner unit 200 (S40), and the signal-meta If the signal-meta is not output in the output determination step (S40), the signal returns to the second tuner operation on step (S30), and if it is output, the signal-meta output from the first and second tuner units 100 and 200 is output. In operation S50, it is determined whether the level of the signal-metameter output from the second tuner unit 200 is high by comparing the Cs.

In this case, when the signal-meta level output from the second tuner unit 200 is not higher than the signal-meta level output from the first tuner unit 100 in the signal-meta comparison determination step (S50), the first signal is measured. Returning to the tuner operation on step S30, if high, the microcomputer 900 outputs a control signal for driving the relay unit 1200 (S60).

In addition, when the control signal is output in the control signal output step S60, the control signal output from the microcomputer 900 is input to the transistor 1300 to operate (S70), and in the transistor on step S70. When the transistor 1300 is turned on, the relay unit 1200 operates (S80), and when the relay unit 1200 is driven in the relay driving step (S80), it is output from the second tuner unit 200. The driver or user may listen to the voice signal (S90).

As described above, in the broadcast receiving apparatus and method using the two tuners of the present invention, two tuners are built in the car audio to receive and receive a frequency transmitted from a broadcasting station located at the current position by the first tuner unit, and to move. The frequency transmitted from the broadcasting station is received by the second tuner, and when the reception sensitivity decreases while the memory is stored in the microcomputer, the receiving frequency is automatically moved to the second tuner so that the frequency is not set whenever the driver or the user moves the area. There is no need to effect.

Claims (2)

A first tuner unit for receiving and receiving a frequency transmitted from a broadcasting station before moving; A second tuner unit for receiving and receiving a frequency transmitted from a broadcasting station to be moved; A first frequency amplifier which receives the frequency received by the first tuner and separates intermediate frequency amplification, noise cancellation, and a voice signal; A first capacitor which receives the voice signal output from the first frequency amplifier and removes the DC voltage and outputs the AC voltage; A first reverse voltage prevention diode for preventing an AC voltage output from the first capacitor from being reversely discharged; A second frequency amplifier receiving the frequency received by the second tuner and performing the same operation as the first frequency amplifier; A second condenser that receives an audio signal output from the second frequency amplifier and performs the same operation as that of the first condenser; A second reverse voltage prevention diode which operates in the same manner as the first reverse voltage prevention diode so that the AC voltage output from the second capacitor is not discharged backward; After receiving the frequency output from the first tuner unit and outputting a control signal, receiving and storing the frequency output from the second tuner unit and comparing the signal-metameters of the first and second tuner units to generate a control signal. A microcomputer for outputting; A first filter unit receiving a control signal output from the microcomputer and applying a set voltage suitable for a frequency such that the first tuner unit can receive a frequency of a desired band; A second filter unit receiving a control signal output from the microcomputer and applying a set voltage suitable for a frequency such that the second tuner receives a frequency of a desired band; A relay unit receiving the control signal output from the microcomputer and selecting and outputting signals output from the first and second frequency amplifiers; And a relay unit configured to perform a switching operation so that the relay unit receives an control signal output from the microcomputer and performs an on / off operation. A first tuner use step (S10) of checking whether a broadcast is currently received using the first tuner; A memory input determination step (S20) of determining whether a memory key is input, when it is checked whether the first tuner unit is being used in the first tuner use checking step (S10); A second tuner operation on step (S30) of returning to the first tuner use checking step (S10) if the memory key is not input in the memory input determination step (S20), and a second tuner unit operating if the memory key is input; A signal-meta output determination step (S40) of determining whether a signal-meta is output from the second tuner unit when the second tuner unit operates in the second tuner operation on step (S30); If the signal-meta is not output in the signal-measurement determination step (S40), the signal returns to the second tuner operation on step (S30), and if so, compares the signal-meta-meters output from the first and second tuner units. A signal-meta comparison determination step (S50) of determining whether the level of the signal-meta output from the second tuner unit is high; If the signal-meta level output from the second tuner unit is not higher than the signal-meta level output from the first tuner unit in the signal-meta comparison determination step (S50), the process returns to the second tuner operation on step (S30). And, if high, the control signal output step (S60) for outputting a control signal for driving the relay in the microcomputer; A transistor on step (S70) in which a transistor is operated when a control signal is output in the control signal output step (S60); A relay driving step (S80) in which a relay is operated when the transistor is turned on in the transistor on step (S70); If the relay is driven in the relay driving step (S80), the broadcast receiving method using two tuners comprising a second tuner listening step (S90) for listening to the signal output from the second tuner unit.