JPH03225655A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent an unrecorded part from being mistaken for the fault of an equipment, etc., by a user by displaying that it is the unrecorded part on a display means when a magnetic tape travels on the unrecorded part. CONSTITUTION:A CTL signal is not counted by a CTL counter part 13 in the unrecorded part, so that a display control part 14 interrupts the control of counting-up in the display of hour, minute and second. Then, the display of hour, minute and second is stopped at that time and kept in such a state in the display part 15. When the CTL signal is not detected, an H signal is outputted from an unrecording detection part 16. Since the H signal is also supplied to another input terminal of an AND gate 17 from a control part at such a time, the H signal is supplied to the control part 14 from the gate 17. Based on the H signal, the control part 14 controls the display part 15 to display that it is the unrecorded part. Then, the user does not mistake the unrecorded part as the fault of the equipment and the tape.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording/reproducing device, and more particularly to a display unit for displaying various operational information in the magnetic recording/reproducing device.

[Summary of the Invention] The magnetic recording and reproducing apparatus of the present invention has a display means configured to count and display the running time when a magnetic tape, which is a recording medium, runs, and when the magnetic tape reaches an unrecorded part, This is detected by a non-recording detection means, and a display indicating that the magnetic tape has reached an unrecorded portion is displayed on the display means.

[Prior Art] In a magnetic recording/reproducing device using a magnetic tape as a recording medium, for example, a CTL signal is recorded along with recording a video signal or an audio signal on the magnetic tape. Some compatible devices can indicate the amount of tape travel in hours, minutes, and seconds corresponding to the playback time by counting CTL signals during playback, high-speed playback, fast forwarding, rewinding, etc. , In the display section provided on the front of the device housing, display section 1 shows the operating status as shown in Figure 3 (the figure shows the fast forwarding status).
In addition, a display section 2 is provided to indicate the running distance in hours, minutes, and seconds, and in the case shown, the user can know that the magnetic tape is running at a point 24 minutes and 53 seconds from the recording start point. I can do it.

Furthermore, even in devices compatible with a recording method that does not record CTL signals, similar display is possible by methods such as envelope detection of reproduced signals.

[Problems to be Solved by the Invention] By the way, in the display means configured to count and display the hours, minutes, and seconds in the recorded portion based on the CTL signal etc. as the tape runs, When the magnetic tape reaches the unrecorded area, the CTL signal or the envelope of the playback signal is no longer detected, so the count-up of hours, minutes, and seconds (or countdown if it is being rewound) is stopped. It has characteristics.

For example, if the magnetic tape has video signals recorded for only 30 minutes and 41 seconds, fast forwarding continues from the state shown in FIG. As shown in the figure, when "0.430, 41." is reached, the hours, minutes, and seconds are displayed at °'0.30, 41. ” and the value will not be counted up.

Therefore, such a display means can accurately tell the time of the part already recorded on the magnetic tape.
It is said to be very useful.

However, for people who are not familiar with devices equipped with this type of display means, if the counting of hours, minutes, and seconds stops at an unrecorded part, they may mistakenly think that there is a problem with the device or the tape. There are many things.

In other words, in the display means of conventional VTR devices, for example, a four-digit numerical value is used to count up based on the rotation of the capsun, etc., in response to the running of the tape, regardless of whether it is recorded or unrecorded on the tape. Since there are many things that always display a count, the user may recognize that the tape is running normally by seeing the count being executed on the display (the count number changes). many. Therefore, if a person who is used to such conventional equipment uses a device that does not count the unrecorded portions as described above, the counting will stop, resulting in the tape being cut, the device malfunctioning, or the tape not meeting its product specifications. There was a problem in which incorrect judgments were made, such as that the product was defective and did not have the correct number of hours.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a magnetic recording and reproducing apparatus that is equipped with a display means that does not count unrecorded portions. When traveling through a recorded area, the display means displays that the area is an unrecorded area.

That is, when an unrecorded portion on a recording medium such as a magnetic tape is detected by the unrecorded area during operation, the display control means displays an indication on the display means indicating that the recording medium is an unrecorded area. I will try to do the following.

[Operation] When the magnetic tape etc. reaches an unrecorded area, the count on the hour, minute, and second display is stopped, but at the same time, the count on the display means is stopped to indicate that the tape is running on an unrecorded area. Even if the system stops, the user will not misunderstand it as a failure of the equipment, etc.

[Example 1] FIG. 1 shows an example of a display unit employed in the magnetic recording/reproducing apparatus of the present invention. Note that this magnetic recording/reproducing device receives C.
The device is compatible with the recording format in which the TL signal is recorded. In addition, fast forwarding and rewinding operations are performed while the magnetic tape 10 is being loaded onto the magnetic tape. Therefore, even during fast forwarding, etc.
The device must be capable of reading TL signals.

10 is a magnetic tape, on which video signals are recorded on diagonal tracks of the tape using a helical scan method;
Also, audio signals are recorded on tracks in the longitudinal direction of the tape or in diagonal directions like video signals. Furthermore, CTL signals are recorded on CTL tracks formed in the longitudinal direction of the tape.

11 is a CTL head for reading out the CTL signal recorded on the CTL track, and 12 is an amplifier circuit. 13 is a CTL count unit that counts the read CTL signal;
4 is a display control section for controlling various display operations, and 15 is a liquid crystal or backlight type display section provided on the front surface of the casing of the magnetic recording/reproducing apparatus.

The display control unit 14 includes a control unit (CPU
) Based on the signal supplied from The amount of travel is detected as a time amount in hours, minutes, and seconds, and control is performed so that the detected time is displayed on the display unit 15. In addition to displaying the hours, minutes, and seconds and operating status, the display section 15 is also provided with a display section that displays that the magnetic tape 1o is an unrecorded section. ! i'NOT REC
It is possible to display the characters ``ORDING'', 0, or ``unrecorded''.

Reference numeral 16 denotes a non-recording detection section which is designed to be able to determine whether the tape 10 is a recorded portion or an unrecorded portion by detecting the presence or absence of a CTL signal. , for example, “H” for the AND gate 17.
”Output a signal.

Further, an "H" signal is supplied to the AND gate 17 from a control section (not shown) when the tape is running, that is, during playback, variable speed playback, fast forwarding, and nine rewinding.

Since the display unit in the magnetic recording/reproducing apparatus of this embodiment is configured as described above, when the magnetic tape 1o is running over a portion where the magnetic tape 1o has already been recorded, the display unit 15 is displayed based on the CTL count. As the hours, minutes, and seconds change, a display such as that shown in FIG. Even if the timer is set, the hours, minutes, and seconds counting operation will stop and, for example, as shown in FIG. 2, the message [i'NOT RECORDING I] will be displayed.

That is, in the unrecorded portion, the CTL counter section 13
When the CTL signal is not counted (as a result, the display control section 14 interrupts the count-up control of the display of hours, minutes, and seconds, and therefore, the display of hours, minutes, and seconds remains stopped at that point on the display section 15. Then, as the CTL signal is no longer detected, the unrecorded detection unit 16 outputs “H”.
At this time, the other input terminal of the AND gate 17 is also supplied with the H'' signal from the control section, so the AND gate 17 outputs the H'' signal to the display control section 14.
Based on this signal, the display control section 14 displays an indication (fi'NOT RE (1:0RDI) on the display section 15 indicating that it is an unrecorded portion.
NG, 11).

Therefore, even if the count of hours, minutes, and seconds stops changing, the user can recognize that the magnetic tape is running in an unrecorded area, and will not misunderstand that it is a failure of the equipment or tape. do not have.

It is effective for the user to display 17'NOT RECORDING ffl in a different color from other displays or to make it blink, and it can also be displayed near the hours, minutes, and seconds in the display. preferable. Furthermore, an alarm sound may be emitted at the same time.

By the way, as mentioned above, the "H" level is supplied to one side of the AND gate 17 when the tape is running during playback, but it is also supplied in the same way when the tape is running at - or when the tape is stopped. 6 In other words, except when recording or stopping in recording standby mode, [i'NOT RECORD
It is effective to display ING, l.

Note that the CTL counter section 13, display control section 14, unrecorded detection section 16, and AND gate 17 in FIG.
It can be configured by software means in a microcomputer.

In the above embodiments, for example, β type, VHS type VT
We have given examples of devices compatible with recording formats that have CTL signals, such as
It goes without saying that even when the L signal is not provided, the present invention can be applied to equipment that can display hours, minutes, and seconds by detecting the envelope of the reproduced video signal.

[Effects of the Invention] As explained above, the magnetic recording/reproducing device of the present invention allows the user to understand that the recording medium is an unrecorded portion using the display means when the recording medium reaches the unrecorded portion. This display has the effect of preventing the user from being misled even if the counting operation of hours, minutes, and seconds stops due to the recording medium running in an unrecorded area. be.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a display unit according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of a display state in a display unit according to an embodiment of the present invention, and FIGS. 3 and 4 are diagrams showing a display unit in an embodiment of the present invention. It is an explanatory diagram of a display state. IO is a magnetic tape, 11 is a CTL head, 13 is a CTL
A counter section, 14 a display control section, 15 a display section, 16 an unrecorded detection section, and 17 an AND gate.

Claims (1)

[Scope of Claims] The unrecorded detecting means comprises a display means, a display control means for controlling a display operation on the display means, and an unrecorded detecting means capable of detecting an unrecorded portion on a recording medium. When an unrecorded portion on the recording medium is detected by the above, the display control means displays a message on the display means indicating that the recording medium is an unrecorded portion. playback device.