KR970008610B1 - Control method for reproducing order in recording cassette tape - Google Patents

Abstract

The apparatus and method is for controlling sequence of song title in a cassette, in which the sequence of song title being played in cassette of car audio is displayed numerically, thereby facilitating selection of the song title. The apparatus comprises EQ amplifier(20) and power amplifier(25) for amplifying signal played from a head(10), blank detection unit(30) for detecting a blank signal of tape, a first switch(SW1) for selecting fast-forward(FF) or rewind(RW) of the tape, a second switch(SW2) for selecting normal play or high-speed play mode of the tape, a micro computer(40), a key matrix(50), and a display unit(60) for displaying a count value of the micro computer.

Description

Control method of playing music order control device of cassette

1 is a block diagram of hardware functions of the present invention.

2 is an operation control flowchart of the present invention.

3 is an operation control flowchart using a counter up / down adjustment key of the present invention.

* Explanation of symbols for main parts of the drawings

10: head 20, 25: amplifier

30: blank monitoring unit 40: micom

50: key matrix 60: display unit

SW ₁ , SW ₂ : switch

The present invention relates to a playing song order control device and a control method of a cassette, and more particularly to a playing song order control device and a control method to facilitate the selection of the playing song by displaying the order of the songs played in the car audio with a number .

In conventional car audio, the cassette does not display the order of the songs played.

Therefore, cassette audio has a problem that it takes a lot of time when selecting a song you want to hear because the position of the song and the user wants to hear when the song is played.

In particular, since the audio device installed in the vehicle is driven by the user, the time taken to select a song to listen to is directly connected to the risk of a traffic accident.

Therefore, the user is inconvenient to listen to the cassette playing music which he does not want to hear.

The present invention was devised to solve the above-mentioned problems and inconveniences, and an object of the present invention is to display the order of selection of the tape played on the cassette so that the user can easily select the position of the currently listening song and the desired song. In addition, the present invention provides an apparatus and a control method for playing music order of a cassette to detect a blank area, which is an unrecorded portion between songs and songs of the tape, so that the beginning of a song can be found.

Technical means for achieving the object of the present invention, the EQ amplifier and power amplifier for amplifying the signal reproduced from the head in the apparatus for controlling the playing music of the cassette, and the blank detection unit for detecting a blank signal of the tape of the amplified signal A first switch (SW ₁ ) for receiving the tape power supply (B ⁺ ) and selecting fast forward (FF) and rewind (REW) of the tape; and a first switch (SW ₁ ) for receiving the tape power to select normal and high speed playback of the tape. A second switch (SW ₂ ), a microcomputer for counting the blank detection unit and the first and second switch signals, a key matrix for transmitting a key signal to the microcomputer, and a display unit for displaying a counter coefficient of the microcomputer; It is characterized in that the order of the songs to be played with a number displayed.

Here, it is preferable that a resistor is connected between the amplification time 20 and the blank detection unit to adjust the S / N ratio to distinguish between the play music signal and the blank signal among the signals read from the head.

In addition, it is effective to connect a capacitor and a resistance time constant to adjust the time for detecting the blank signal in the blank detecting unit.

In addition, it is advantageous to connect the capacitor and the resistance time constant so that the micro sensor detects the blank signal output from the head and the microcomputer adjusts the output of the blank detector.

The key matrix may include a counter reset key and a counter up / down key for resetting a counter configured in the microcomputer.

On the other hand, in the method of controlling the playing music of the cassette, the first judgment step of resetting the counter value DP to " 1 " and determining normal playback / fast playback when the cassette operation starts and in tape mode; A second judging step of judging fast forward / rewinding according to the judging step; a third and fourth judging step of judging an input BD from the blank detecting unit according to the second judging step; The fifth and sixth judging steps of increasing and decreasing the counter value according to the fourth judging step and determining whether the counter values DP are "15" and "1", and according to the fifth and sixth judging steps. The order of the songs to be played by sequentially resetting the counter value DP to " 1 " and " 15 " or determining whether the reset key from the key matrix is on or not is performed. It is characterized by displaying.

Here, all of the counter values DP are displayed on the display unit.

In addition, when the counter up / down key of the key matrix is turned on, it is preferable to increase the counter value DP (DP = DP + 1) and decrease (DP = DP-1).

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a functional block diagram of each functional unit of the present invention.

Here, the head 10 of the cassette is configured, the input of the EQ amplifier 20 is connected to one side of the head 10 and the resistor (R ₁ ) and the capacitor (C ₁ ) is connected to the other side is grounded.

The output of the EQ amplifier 20 is connected to the power amplifier 25, and at the same time, is connected to the space detecting unit 30 for detecting a gap between the tune and the tune through the capacitor C ₂ and the resistor R ₂ .

The blank detecting unit 30 is connected to a tape output detecting end S ₁ for detecting a tape output from the head 10, a blank time resistor R ₃ and a condenser C ₃ of a blank tape portion. The first time constant detection stage S ₂ and the resistor R ₄ for outputting a high signal after the space detection of the tape, the second time constant detection stage S ₃ connected to the capacitor C ₄ , and the space It consists of an output stage S ₄ .

The EQ output signal is connected to the tape output detection terminal S ₁ of the blank detection unit 30, and the blank output terminal S ₄ is connected to the blank detection port BD of the microcomputer 40.

Meanwhile, the first switch SW ₁ and the second switch SW ₂ are connected to the tape power supply B ⁺ through a resistor R ₅ .

The first and second switches SW ₁ and SW ₂ are operated in conjunction with each other, and switch the fast forward FF and rewind SEW operations of the tape.

The connection point of the first and second switches SW ₁ and SW ₂ is grounded through a zener diode D ₁ .

The output terminal of the first switch SW ₁ is connected to the fast forward and rewind input terminals F / R of the microcomputer 40.

The input terminal F / R has a fast forward mode when the signal is high and a rewind mode when the signal is low.

The output terminal of the second switch SW ₂ is connected to the normal reproduction and high speed reproduction input terminals P / F of the microcomputer 40.

The input terminal P / F is in high speed playback mode when high, and in normal playback mode when low.

The microcomputer 40 is connected to the key matrix manipulation unit 50 so as to transmit and receive a key signal, and is also connected to the display unit 60 which displays the order of songs to be played.

The display unit 60 may use LCD or LED.

The key matrix operation unit 50 is provided with various function keys such as a counter reset key 51, a counter up key 52, a counter down key 53, and the like.

With this configuration, the tape performs the Low Motion Determination (AMS) function, and detects the empty part between the playing music and the music of the tape, and receives the high level pulse signal generated as an indication of the detection signal. Display by counting the number of times.

Hereinafter, these working effects will be described with reference to FIG. 2 which is a control flowchart of the present invention.

When the cassette is operated, the signal reproduced from the head 10 is applied to the power amplifier 25 via the EQ amplifier 20, and at the same time the reproduction signal is supplied to the tape blank detection unit through the capacitor C ₂ and the resistor R ₂ . It is input (S ₁₎ to (30).

At this time, the S / N ratio for distinguishing the blank signal and the reproduction signal can be adjusted by the resistor (R ₂ ).

In addition, the output S ₄ of the blank detection unit 30 capable of detecting a blank signal in the microcomputer 40 may be adjusted by the time constants of the capacitor C ₄ and the resistor R ₄ .

The microcomputer 40 has a built-in counter that can count the pulse of the blank output.

In FIG. 2, when the cassette audio device is turned on and the operation is started 101, the tape mode is determined 102, and in the tape mode, the counter in the microcomputer 40 is reset 103.

The reset here is not "0" but "1".

That is, it resets to counter variable DP = 1.

Subsequently, the microcomputer 40 determines 104 whether the playback and fast playback input ports P / F are high.

If the port P / F is a high signal, it is a high speed reproduction mode.

Therefore, the microcomputer 40 next determines 105 whether the fast forward and rewind ports F / R are high.

If the result of the determination 105 is high, the microcomputer 40 determines whether the input terminal BD signal from the blank detection unit 30 of the tape is high 106.

If the result of the determination 106 is low, the process jumps to the step 104, and if it is high, the counter variable DP is increased 107 to DP = DP + 1, and then it is determined whether the counter variable DP is DP = 15. (108).

If the determination 108 results in DP = 15, the counter is reset to an initial state (DP = 1) 109 and jumps to the step 104 for execution. If the determination 108 results in DP = 15, the key matrix does not exist. If the counter reset key 51 of (50) is pressed (110), if it is pressed, it jumps to the step (103), and if it is not pressed, it jumps to the step (104).

Here, the counter variable DP 15 indicates the number of songs recorded on one side of the tape.

Therefore, the variable value is arbitrarily set according to the number of recorded songs.

On the other hand, if the P / F port is low in the P / F port determination step 104 of the microcomputer 40 to jump to the step 106 in the normal playback operation to determine the BD port.

In addition, if the F / R port is low instead of high in the F / R port determination step 105 of the micom 40, since it is a rewind mode, it is determined whether the BD port signal of the micom 40 is high (111). If it is low, the process jumps to the step 104 and executes. If the value is high, the counter variable DP is decreased by 112 by DP = DP-1, and it is determined whether the variable DP is 1 ( 113).

If the result of the determination 113 is DP = 1, the counter is reset to DP = 15 (114) and jumps to the step 104, and if the result of the determination 113 is not DP = 1, the key metrics ( If the counter reset key 51 of 50 is pressed (115), if it is not pressed, it jumps to the step 104, and if it is pressed, it jumps to the step 103 and executes it.

The display of the music counted by the counter of the microcomputer 40 is displayed on the display unit 60.

On the other hand, when the counter up key 52 and the counter down key 53 of the key matrix 50 is pressed, it operates as shown in FIG.

That is, when the counter up key 52 is operated, FIG. 3A is inserted into and operated in steps 106 and 107 of FIG.

When the up key is turned on, the counter variable DP is incremented (DP = DP + 1).

In addition, when the down key 53 is operated, the third (B) diagram is inserted and operated between the steps 111 and 112 of FIG.

When the down key is on, the counter variable DP is decremented (DP = DP-1).

Using this key, you can select and listen to songs in the order you want from the song you are currently listening to.

For example, if the second song is currently listened to, the display unit 60 displays "2".

After that, if you want to listen to the fifth song, count the counter up key 52 to 3 to play back the tape.

In this manner, the present invention has an excellent effect of automatically selecting a desired sequence of songs with a blank counter.

Claims (8)

In the apparatus for controlling the playing music of the cassette, the EQ amplifier 20 and the power amplifier 25 for amplifying the signal reproduced from the head 10, and the blank detection unit 30 for detecting a blank signal of the tape of the amplified signal And a first switch (SW ₁ ) for receiving the tape power supply (B ⁺ ) to select fast forward (FF) and rewind (REW) of the tape, and a first switch (SW ₁ ) for receiving the tape power to select normal playback and fast playback. 2 switches SW ₂ , a microcomputer 40 for receiving and counting the first and second switch signals of the blank detecting unit, a key madrix 50 for exchanging a key signal with the microcom, and a counter count of the microcom. Apparatus for controlling the playing song sequence of the cassette, characterized in that the display unit 60 is displayed to display the order of the songs to be played by numbers. The resistor R2 is connected between the amplifier 20 and the space detecting unit 30 to adjust the S / N ratio for distinguishing the play music signal and the space signal among the signals read from the head 10. Control device characterized in that. 2. The control apparatus according to claim 1, wherein a capacitor (C3) and a resistor (R3) time constant are connected to the space detecting unit (30) for time adjustment for detecting a space signal. The capacitor (C4) and the resistor (R4) of claim 1, wherein the space detector 30 detects the output of the blank signal from the head so that the microcomputer 40 adjusts the output S4 of the space detector. A control device characterized by connecting a time constant part. The method according to claim 1, wherein the key matrix 50 comprises a counter reset key 51 and a counter up / down key 52, 53 for resetting a counter configured in the microcomputer 40. Controller. In the method of controlling the playing music of a cassette, when the operation of the cassette starts (101) and the tape mode (102), the counter value (DP) is reset to " 1 " In the first judging step 104, the second judging step 105 for determining the fast forward / rewinding according to the first judging step, and for determining the input BD from the blank detecting unit according to the second judging step. In accordance with the third and fourth determination steps 106 and 111 and the third and fourth determination steps, the counter value is increased (107) and decreased (112), and the counter value DP is " 15 " The fifth and sixth judging steps 108 and 113 for determining whether it is "1" and the counter value DP are reset to "1" and "15" according to the fifth and sixth judging steps. (114) The seventh and eighth judgment steps 110 and 115, which determine whether or not the reset key from the key mattress is on, are executed sequentially to display the order of the songs to be played. Instrumental methods of sequencing a cassette Gong. 7. The control method according to claim 6, wherein all of the counter values (DP) are displayed on the display unit (60). 7. The control method according to claim 6, wherein the counter value DP is increased (DP = DP + 1) and decreased (DP = DP-1) when the counter up / down key of the key matrix is turned on. .