JPH0528721A - Tape recorder - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a tape recorder capable of confirming that a tape is running even when there is no control signal on the tape. [Structure] A control signal detected by a control signal reproducing head 11 is counted by a linear counter calculation unit 12, and at the same time, signals from a supply reel sensor 14 and a take-up reel sensor 15 are input to a calculation unit 16 of a remaining tape time and the like. While calculating the remaining tape time,
When the tape reaches the unrecorded portion while the linear count value is displayed on the display unit 17 and the tape is running, the change of the linear counter stops, but the control signal detection unit 13 outputs the information without control. Control unit 18
Since the control unit 18 automatically switches the display content of the display unit 17 from the linear count value to the tape remaining time or the like, the tape running can be performed by displaying the tape remaining time or the like even in an unrecorded portion. Can be confirmed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video tape recorder and a digital audio tape recorder having a tape running time display means.

[0002]

2. Description of the Related Art In recent years, what is called a linear time counter has become mainstream for displaying the running time of a tape in a video tape recorder or the like. The linear time counter counts the number of control signals used as reference signals when recording / reproducing a tape, converts the time into the time, and obtains the running time of the tape and displays it on the display unit. If it is constant, the length of the tape is always proportional to the number of control signals written therein, so that the running time proportional to the moving amount of the tape can always be displayed during running. Further, even in a tape recorder having a function of calculating the tape remaining time with respect to the time of the entire tape from the rotation cycle and the rotation frequency of the supply reel base and the take-up reel base, a linear time counter is usually displayed on the display unit. However, when it is desired to display the tape remaining time and the like, the display contents of the display section are switched by a changeover switch as needed.

[0003]

However, in the conventional linear time counter display, since the running time is calculated and displayed by counting the control signals that are simultaneously written when recording the tape, the recording is never performed. For an unused tape that has not been performed or a tape that includes an unrecorded portion in the middle, the linear time counter stops even though the tape is running and moving. On the other hand, the value of the remaining tape time, which uses the rotation of the supply reel base and the take-up reel base, is updated regardless of whether it is recorded or unrecorded. Since the linear time counter is still displayed as a stopped state, not only can you not know where the tape is currently running, but you can even determine whether it is actually running or stopped. There is a problem that you can not do it. Furthermore, there is a risk of misunderstanding that the tape is abnormal or the tape recorder is out of order.

In order to solve the above problems, the present invention provides
An object of the present invention is to provide a video tape recorder capable of confirming that a tape is running even when running on an unrecorded portion in a linear time counter display, and checking the current running position of the entire tape. And

[0005]

To achieve the above object, a tape recorder of the present invention comprises a linear time counter utilizing a control signal recorded on a tape, a supply reel sensor, a take-up reel sensor, and Means for calculating the remaining tape time, etc. using the rotation speed detected from the reel sensor, display section for selectively displaying the value of the linear time counter and other information, and detecting the unrecorded section of the tape And a control unit that automatically switches the display content of the display unit from the linear time counter to the display of the remaining tape time etc. when an unrecorded portion is detected while the tape is running by the linear time counter display. It is a composition.

[0006]

The tape recorder of the present invention has the above structure.
While the tape is running, the rotation speed of the reel stand is always detected by the signals from the supply reel sensor and the take-up reel sensor, and the remaining time of the tape is constantly calculated and the linear time counter is displayed. When the unrecorded portion is detected by the unrecorded portion detecting means during traveling, the display content of the display section is automatically switched from the linear time counter display to the tape remaining time display.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A video table recorder according to an embodiment of the present invention will be described below.

FIG. 1 is a block diagram showing the configuration of a video tape recorder according to an embodiment of the present invention. In the figure, 11 is a control signal reproducing head for taking in a control signal when the tape is running, 12 is a linear counter calculating section for counting the reproduction control signal, 13 is a control for judging the presence or absence of the reproduction control signal and detecting an unrecorded section. A signal detector, 14 is a supply reel sensor for detecting the rotation speed of the supply reel stand, 15 is a take-up reel sensor for detecting the rotation speed of the take-up reel stand, 1
6 is a calculation unit for calculating the remaining time of the tape based on the signal sent from the reel sensor, 17 is a display unit capable of selectively displaying the linear counter value, the remaining time of the tape, and the like, 18 Is a control unit for switching the display contents according to the unrecorded portion detection signal from the control signal detection unit.

The mutual relationship and operation of each of the above components will be described. When the tape runs, if it is a recorded tape, the control signal is taken in by the control signal reproducing head 11, and the linear counter calculating unit 12
Is input to the control signal detector 13. The linear counter calculator 12 calculates a linear counter value based on this signal and sends it to the controller 14. On the other hand, since the supply reel base and the take-up reel base rotate at all times while the tape is running, a signal for detecting the rotation speed of each reel base from the supply reel sensor 14 and the take-up reel sensor 15 is the tape remaining time, etc. Is input to the calculation unit 16. The tape remaining time calculation unit 16 calculates the tape remaining time based on the signal and sends it to the control unit 14.

At the same time, information indicating that there is a control signal from the control signal detector 13 is also input to the controller 14. Then, when the linear counter value is displayed on the display unit 17, since the information indicating that the control signal is present is input from the control signal detection unit 13, the control unit 14 continues to display the linear counter value and the video is displayed. The user of the tape recorder can confirm that the tape is running by seeing the value of this linear counter change.

Since the output signal from the control signal reproducing head 11 disappears when reproducing the unrecorded portion of the tape,
Since the input signal to the linear counter calculation unit 12 disappears and the change of the linear counter stops, it is absolutely possible to judge whether the user is unrecorded, the tape is stopped due to an abnormality, or the video tape recorder is out of order. I can not do it. However, when the output signal from the control signal reproducing head 11 disappears, the input signal to the control signal detecting unit 13 also disappears at the same time, so the control signal detecting unit 13 sends information indicating that there is no control signal to the control unit 14. Based on this information, the control unit 14 switches the display content of the display unit 17 from the linear counter value to the display of the remaining tape time and the like. The tape usage time and tape remaining time are updated regardless of the presence / absence of the control signal as long as the supply reel base and the take-up reel base are rotating. You can check the running. Also, since the displayed content is the tape usage time, which is the length from the tape start end to the current position, or the remaining tape time, which is the length from the current position to the tape end, the current position It is also possible to judge where is on the entire tape.

[0012]

As is apparent from the above embodiments, the tape recorder of the present invention selects the linear time counter, the means for calculating the remaining tape time, the value of the linear time counter and other information. Display that can be displayed
Means for detecting the unrecorded portion of the tape, and when the unrecorded portion is detected during tape running by the linear time counter display, the display content is automatically switched from the linear time counter to the display of the remaining tape time etc. By providing the control means, it is possible to easily check the tape running by watching the change of the value such as the remaining time of the tape even while running the unrecorded part, and the displayed contents show the current position of the entire tape. It is intended to realize an excellent video tape recorder that can easily determine the surrounding area.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a video tape recorder according to an embodiment of the present invention.

[Explanation of symbols]

 11 Control Signal Playback Head 12 Linear Counter Calculation Section 13 Control Signal Detection Section 14 Supply Reel Sensor 15 Winding Reel Sensor 16 Calculation Section for Remaining Time of Tape 17 Display Section 18 Control Section

Claims (1)

Claim: What is claimed is: 1. A means for detecting a control signal recorded on a tape to calculate a running time of the tape (hereinafter referred to as a linear time counter), and a detection for detecting a rotation speed of a supply reel base. Device (hereinafter supply reel sensor), detection device for detecting rotation speed of take-up reel stand (hereinafter take-up reel sensor), and rotation speed detected from each reel sensor To the end of the tape (hereinafter tape remaining time) or at least one of the distance from the current position to the end of the tape (hereinafter tape remaining time), and the value of the linear time counter. The display part that can selectively display other information and the part where the control signal is not recorded on the tape (hereinafter referred to as unrecorded part) are detected. And a control unit for automatically switching the display content of the display unit from the linear time counter to the display of the remaining tape time etc. when an unrecorded portion is detected during tape running by the linear time counter display. Tape recorder.