KR20000004046A - Apparatus for displaying the remaining time of a record tape - Google Patents

Abstract

PURPOSE: An apparatus for displaying the remaining time of a record tape is provided to inform a user the rest time of a record tape. CONSTITUTION: The apparatus for displaying the remaining time of a record tape comprises: a unit(85) in which a record tape is inserted; a loading motor(90) connected to the unit(85), for putting forward and backward the record tape, wherein the loading motor(90) includes a first loading motor(90a) and a second loading motor(90b); a comparator for comparing a speed of the first loading motor(90a) with that of the second loading motor(90b), wherein the comparator applies a comparison result when the velocity of the first loading motor(90a) corresponds to that of the second loading motor(90b); a counter(100) for supplying a timer(65) with a record time(T) in order to let know that a record time of the record tape exactly elapses half when the velocity of the first loading motor(90a) corresponds to that of the second loading motor(90b), wherein the counter(100) is reset by the timer(65) and again counts the remaining record time(t) corresponding to half the record tape, and wherein the timer(65) reads the record time(t), minuses the record time(t) from the record time(T) and applies the remaining time(T-t) to an on screen display(OSD) (105) which displays the remaining time(T-t) on the screen.

Description

Recording tape remaining time of YRC

The present invention relates to a apparatus for displaying the remaining time of a cassette tape on a VCR that displays a recordable remaining time of a tape on an OSD screen during recording of a VCR.

In general, a VCR is a device used for recording and reproducing television broadcast signals, recording and reproducing other recording tapes, broadcasting recording for other channels not being watched, scheduled recording, and absence recording. In this case, since there is no residual magnetism due to the bias magnetic field even in the case of no signal at present, an AC bias method with low noise is adopted, and the recording of the audio signal has a relatively narrow frequency range of about 20-20000 Hz, and the phase relationship is not so much a problem Therefore, the AC bias method is performed. However, the frequency modulation (FM) recording method has been adopted for recording video signals because its frequency range is wide, about 0-4 MHz, and strict phase characteristics are required to faithfully reproduce waveforms.

On the contrary, during reproduction, the recorded magnetic tape is driven while being connected to the gap of the magnetic head, and the signal read by the magnetic head is amplified and processed and reproduced through the water pipe and the speaker.

If you record more than a certain time when recording on the above VCR, you should know the available recording time of the recording tape in advance and have another recording tape according to the capacity of the recording program.However, the remaining time of the recording tape is not displayed to the current user. There was a problem.

The present invention has been made to solve the above problems, an object of the present invention is to rotate the two motors provided in the deck at the time of the program recording so that the user can know the remaining recordable time of the recording tape during recording VCR counting the recording time to the point where the rotation speed is equal (half recording) by comparing the speed, and displaying the current recording remaining time, which is the result of subtracting the newly counting recording time from the counted recording time, with the OSD. The present invention provides a display device of the remaining time of the recording tape.

1 is a block diagram illustrating a display tape remaining time display apparatus of a VCR.

2 is a flowchart illustrating the operation of the recording tape remaining time display apparatus of the VCR.

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

10: antenna 15: high frequency amplifier

20: mixing unit 25: local oscillation unit

30: tuner 35: TV

45: VCR Y / C IC 50: Head Amplifier IC

55: video head 60: remote controller

65: timer 70: synchronization detection unit

75: ciscon 80: integrator

85: Deck 90: Loading Motor

90a: Loading Motor A 90b: Loading Motor B

95: comparator 100: time counter

105: OSD

Hereinafter, with reference to the accompanying drawings for the configuration and operation of the embodiment for achieving the object of the present invention.

1 is a block diagram illustrating a recording tape remaining time display apparatus of a VCR.

Referring to FIG. 1, the present invention provides a high frequency amplifier 15 for amplifying a high frequency signal, which is a composite video signal received from an antenna 10, a local oscillator 25 for supplying a signal for frequency conversion, An input signal amplified by the high frequency amplifier 15 and a local oscillation frequency received from the local oscillator 25 and a mixing unit 20 for converting into an intermediate frequency, the high frequency amplifier 15 and the local oscillator 25 And a tuner unit 30 configured to select a high frequency signal of a channel desired by a user and convert it into an intermediate frequency, and a composite image signal from the tuner unit 30 to receive a luminance signal as an FM low carrier wave. The raw modulation and color signals are subjected to low frequency conversion, while the VCR Y / V is applied to the TV 35 by a playback composite video signal generated by demodulating the modulated luminance signal and the color signal output from the head amplifier IC 50 into the original signal. C IC 45 and the VCR After amplifying the luminance signal and the color signal modulated from the Y / C IC 45 and being recorded in the video head 55, the signal recorded in the video head 55 is read and amplified. It is connected to the head amplifier IC 50 to be demodulated, and receives the synchronization signal C-SYNC from the integrator 80, and according to the signal applied through the user's remote controller 60 operation, VCR Y / A timer 65 that applies a control signal to the C IC 45 and controls the sheath 75, and is connected to the VCR Y / C IC 45 to detect the synchronization signal C-SYNC and 75) and a sync detector 70 output to the integrator 80, a sheath cone 75 for controlling the operation of the VCR by receiving a sync signal from the sync detector 70, and the sync detector 70. An integrator 80 for integrating a synchronization signal to be output to the timer 65, and various commands of a user can be made. A remote controller 60 having a key, a deck 85 into which a recording tape is inserted, a loading motor 90 mounted on the deck 85 to move the recording tape forward and backward, and the loading motor 90 Is connected to the comparator 95 and the timer 65 for comparing the speeds of the loading motor A 90a and the loading motor B 90b and applying the result to the timer 65 when they match each other. And a time counter 100 that continuously counts the time progressed during recording and applies the timer 65 to the timer 65, and the OSD 105 displays the remaining time of the recording tape on the OSD screen under the control of the timer 65. do.

Hereinafter, the operation of the present invention will be described in more detail with reference to the accompanying drawings.

Referring to FIG. 1, first, the main method of receiving a broadcast signal using the tuner unit 30 is the FS (FREQUENCY SYNTHESIZE) method, and the FS method uses a timer. If a user inputs a reference frequency corresponding to each channel in advance and the user selects a broadcast channel, the tuner unit 30 can receive the broadcast by transmitting the reference frequency of the corresponding channel as data. Here, the components of the tuner unit 30 will be described in more detail. The high frequency signal received from the antenna 10 is characterized by the characteristic impedance of the feeder FEEDER through an input circuit (not shown) of the tuner unit 30. The input impedances of the high frequency amplifier 15 are matched and output to the high frequency amplifier 15, and the high frequency amplifier 15 increases the gain of the received high frequency signal, improves selectivity, and prevents image disturbance. . In addition, the S / N ratio is improved, and the local oscillation frequency output from the local oscillator 25 is prevented from being radiated to the antenna 10 to affect other receivers. In addition, the signal amplified by the high frequency amplifier 15 and the frequency output from the local oscillator 25 is input to the mixing unit 20, the mixing unit 20 mixes the high frequency signal and the local oscillation frequency To generate an intermediate frequency corresponding to the difference between the two frequencies.

In addition, the intermediate frequency signal, which is a composite video signal output from the tuner unit 30, is applied to the VCR Y / C IC 45, and the VCR Y / C IC 45 is applied from the tuner unit 30. The video signal is processed and output to the TV 35, while the playback composite video signal is applied from the head amplifier IC 50 to be output to the TV 35.

The VCR Y / C IC 45 receives a complex video signal from the tuner unit 30 according to a control signal of the scissor 75 to be described later in recording mode, and converts the luminance signal into an FM low carrier and color signal. After the low-frequency conversion is to be output to the video head 55 to be recorded on the video tape, while in the playback mode, the signal read by the video head 55 is applied via the head amplifier IC (50) FM conversion The luminance signal and the low-conversion color signal are demodulated into the original luminance signal and the color signal, and then a playback composite video signal is generated to be displayed on the TV 35.

The synchronous detection unit 70 is connected to the VCR Y / C IC 45 to detect a VCR synchronous signal C-SYNC mixed in the video signal output from the VCR Y / C IC 45, and then pulses. The signal is converted into a signal form and output to the scissor 75 and the integrator 80 to be described later. The integrator 80 receives the sync signal from the sync detector 70 and integrates the signal to the timer 65 to be described later. do. Here, the sheath cone 75 receives the synchronous signal from the synchronous detection unit 70 to control the VCR Y / C IC 45, and performs a cooperative operation with a timer 65 to be described later.

Hereinafter, the operation of the sheath cone 75 will be described in detail.

The ciscon 75 serves as a relay between the user and the VCR set, and receives the synchronization signal from the synchronization detection unit 70 and modulates and demodulates the luminance signal and the color signal in the VCR Y / C IC 45. The control signal, and senses an electrical signal corresponding to a button of the remote controller 60 switched by the user, and applies a driving signal to each part constituting the VCR so that the VCR can operate according to a function operated by the user. The operation state of the VCR set is controlled so that the contents recorded on the Cassette Tape are not damaged. In addition, the sheath cone 75 controls the AC power supplied through the power cord by a power control signal, drives the loading motor to take out and inserts the cassette, and performs an operation. The loading motor 90 is driven by sensing the state of the corresponding deck (DECK) 85 to control the mechanism of the deck (85). Also, it detects the beginning and end of the recording tape to adjust the progress of the tape, and detects the rotation of the reel (not shown; reel) to check the progress of the recording tape is generated from the reel sensor (not shown; RREE SENSOR) If the pulse is not detected within a certain period of time, the system automatically switches to the stop mode, and the humidity in the VCR set is increased so that the humidity in the set is increased by using the DEW SENSOR to prevent damage to the running tape. When the temperature rises above a certain value, the system automatically switches to the stop mode for the protection of the recording tape, and when the drum (not shown; DRUM) rotates at a constant speed, it detects a signal of 30 MHz and the system automatically stops. To perform a sensing function such as switching to the stop mode. In order to perform a function such as a reservation recording, a timer 65 to be described later and data corresponding to the reservation recording are transmitted and authorized by serial data processing.

Here, the operation of the timer 65 for controlling the overall operation of the TV image processing IC 40 and the system by receiving the synchronization signal through the integrator 80 will be described in detail.

First, after receiving a sync signal in the form of a pulse from the integrator 80 to detect a normal broadcast signal application state, a playback composite video signal output from the VCR Y / C IC 45 is output to the TV 35. Ensure normal playback through the water pipe. In addition, by comparing the button that the user has switched the remote controller 60 with a predetermined code to perform a function corresponding to the button, it is possible to set and change the time using the clock (CLOCK) function, By using the clock function, the system transmits data with the sheath 75 during the scheduled recording, and sets the recording start time and the recording end time to automatically record the current deck 85 status or the The operation state of the sheath cone 75 is sensed so as to be displayed on the display unit mounted on the VCR system using LEDs.

In addition, the head amplifier IC 50 connected to the VCR Y / C IC 45 mixes the FM-modulated luminance signal and the low-pass converted color signal output from the VCR Y / C IC 45 and amplifies about 60 dB. While recording to the video head 55, the signal extracted from the tape by the video head 55 is further amplified by 60 dB to demodulate the original luminance signal and the color signal.

In addition to the general operation as described above, the operation of the remaining time of the recording tape for the purpose of the present invention is as follows.

When the user switches the recording button using the remote controller 60 to display the remaining time of the recording tape recorded by the user, the timer 65 controls the time counter 100 to start recording at the same time. Count the time. When the recording proceeds by the above, the comparator 95 senses the speeds of the loading motor A 90a and the loading motor B 90b mounted on the deck 85 and matches the result with the timer 65. To apply. When the speeds of the loading motor A 90a and the loading motor B 90b coincide with each other, it means that the recording time of the current recording tape is exactly half consumed. When the result is applied to the timer 65, the timer 65 reads the recording time T counted up to the present time from the time counter 100, resets the time of the time counter 100, and the other half of the recording tape. Recount the recording time (t) for. When the time counted by the time counter 100 to half is T and the time counted after the half is t, the remaining time of the recording tape becomes T-t. That is, the timer continuously reads the time t counted by the time counter 100 after half, and subtracts the count time t after the half from the first T (half-recording time). The remaining time is recognized and the OSD 105 is controlled to display the remaining time on the OSD screen.

The operation of the recording tape remaining time display apparatus of the VCR in the above process will be described in detail with reference to the flowchart of FIG. 2.

2 is a flowchart for describing an operation of a recording tape remaining time display apparatus of a VCR.

First, referring to FIG. 2, the user turns on the VCR using the remote controller 60 for recording (S100).

When the VCR is turned on in step S100 and recording starts, the timer 65 controls the time counter 100 to count the recording time (S200).

When the recording time is counted in the process S200, the comparator 95 compares the rotational speeds of the loading motor A (90a) and the loading motor B (90b) mounted on the deck 85 to determine whether (S300).

According to the result determined in the process S300, if the rotational speed of the loading motor A (90a) and the loading motor B (90b) does not match, repeating from the process S200, the loading motor A (90a) and loading motor B (90b) If the rotational speeds of?) Coincide with each other, the timer 65 reads the recording time up to the above (S400).

When the recording time is read in the process S400, the timer 65 resets by controlling the time counter 100 and recounts from the read point (S500).

When the time counter 100 recounts in step S500, the timer 65 calculates the value as the remaining time of the current recording tape by subtracting the read recording time from the current recounting recording time (S600).

When the remaining time of the recording tape is calculated in step S600, the timer 65 controls the OSD 105 to display the remaining time of the recording tape so that the calculated value can be output to the OSD screen (S700).

Through all the above processes, the remaining time of the recording tape remaining time display apparatus of the VCR is implemented.

As can be seen from the above description, the present invention compares the rotational speeds of two motors provided in the deck at the time of program recording so that the user can know the remaining recordable time of the recording tape during recording. Counts the recording time up to the same point (half-recording), and displays the current recording remaining time, which is the result of subtracting the newly counted recording time from the counted recording time, with the OSD. There is an effect that can be confirmed.

Claims (1)

In a VCR connected to a television for recording a television program and playing back a recording tape, Deck 85 into which the tape is inserted, A loading motor 90 mounted on the deck 85 to move the recording tape forward and backward; A comparator 95 for comparing the speeds of the loading motor A 90a and the loading motor B 90b constituting the loading motor 90 and applying the result to the timer 65 when they match each other; When the speeds of the loading motor A 90a and the loading motor B 90b coincide with each other, the recording time T is applied to the timer 65 to indicate that the recording time of the current recording tape is exactly half consumed. A time counter 100 which is reset by the timer 65 to count the recording time t for the other half of the recording tape again; The time counter 100 continuously reads the recording time t counting from half afterwards, and subtracts the counting time t after half from the previously read T (half recording time) to the OSD 105. A timer 65 for applying the remaining time Tt; And a OSD (105) for displaying the remaining time (T-t) applied by the timer (65) on an OSD screen. Residual tape display device of the recording tape of the VCR.