JPH0572663B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic tape for detecting a song interval detection device for testing the detection time of a song gap detection device of a tape recorder.

Conventional configuration and its problems In recent years, in order to enhance the editing functions of tape recorders, song interval detection devices have been increasingly used to perform song selection and song cue functions. The detection time of the song interval detection device is set by taking into account variations in the electric circuit as well as variations in the running system, especially since the speed of the motor is not generally controlled during song interval detection, especially during fast forwarding. Therefore, a magnetic tape for detecting the detection time of a song interval detection device has been proposed.

A conventional magnetic tape for testing a track distance detection device will be described below.

FIG. 1 is an explanatory diagram showing an example of a recording signal of a magnetic tape for testing with a conventional track interval detection device, in which 1 is a first signal section, and 2 is a first track interval following the first signal section. Section 3 is a second signal section following the first song interval section, and the first signal section and the second signal section include a signal at a detection level higher than the detection level of the song interval detection device to be inspected. The signal is recorded in the first song interval 2 at a level that is lower than the signal detection level of the song detection device to be inspected.

The operation of the magnetic tape for testing the track interval detection device constructed as described above will be described below.

When a magnetic tape composed of signals as shown in FIG. By reproducing the first inter-song section 2, the inter-song detection device detects that the first signal section has ended and outputs an inter-song detection signal. The tape recorder can use this inter-track detection signal to change the operating mode, such as stopping tape running, but if the inter-track detection time setting of the inter-track detection device is longer than the allowable value, or the tape recorder If the setting of the tape running speed is higher than the allowable value, the song interval detection device cannot detect the first song interval section 2 as an interval, and the first signal section 1
Since the second signal unit 3 determines that the songs are the same song and does not output the song interval detection signal, it is possible to detect the song as a defect without switching the operation mode.

However, in the above-mentioned conventional configuration, the time of the first song interval 2 is set to the time that should be detected by the song interval detection device, so although it is possible to detect that there is a song gap, it is possible to check that there is a song gap, but there is no song gap. This method has a problem in that it is impossible to detect if a portion is detected incorrectly.

Music tapes and the like currently available on the market generally have a track interval of 3 seconds or more. On the other hand, large signals are not always recorded in parts of songs such as music tapes, and there are moments when there are very small signals or no-signal parts, and these parts are generally said to last less than one second. ing. For this reason, the inter-track detection time of the inter-track detection device of a tape recorder is generally set to about 2 seconds.

Therefore, with a song interval detection device tested using a conventional test tape in which the first song interval 2 in FIG. There was no guarantee that there would be no malfunctions in areas where there was a momentary no signal during the process.

Purpose of the Invention The present invention solves the above-mentioned conventional problems.
To provide a magnetic tape for testing a song interval detection device that can not only guarantee that the song gap detection device operates between songs, but also guarantee that there will be no malfunction during the song.

Structure of the Invention The present invention provides a first signal section, a first inter-musical section following the first signal section, a second signal section following the first inter-musical section, and a second signal section following the first inter-musical section. A magnetic tape for testing a song interval detection device on which a signal consisting of a second song portion following the signal portion and a third signal portion following the second song portion is recorded; The time of the second inter-song portion is set to the minimum value of the inter-song detection time allowable by the inter-song detection device to be tested, and the time of the second inter-song portion is set to the maximum value allowable by the inter-song detection device to be tested. By setting and recording the second signal portion and the third signal portion as different signals, it is possible to easily test that the detection time of the song interval detection device to be tested is within the allowable value. It is something that can be done.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below based on the drawings.

FIG. 2 shows recording signals of a magnetic tape for detecting a song interval detecting device in an embodiment of the present invention. In FIG. 2, 11 is a first signal section, 12 is a first inter-song section following the first signal section 11, and 13 is a first signal section.
is a second signal section following the first inter-song section 12, 1
4 is a third signal section following the second signal section 13, and the first signal section 11, second signal section 13, and third signal section 15 correspond to the signal detection level of the song interval detection device to be inspected. recorded at a level above, and the first inter-song part 1
2 and the second song interval 14 are recorded at a signal detection level below the signal detection level of the song interval detection device to be inspected. Further, the second signal section 13 and the third signal section 15 record different signals, for example, the second signal section 13 records at different frequencies, such as 1 KHz and the third signal section 15 at 4 KHz. Furthermore, the time of the first song interval 12 is the minimum value of the allowable song interval detection time of the song detection operation to be inspected;
For example, it is set to 1.5 seconds, and the time of the second song interval 14 is set to be the maximum allowable song interval detection time of the inspection target interval detection device, for example, 2.5 seconds. Further, the signal portion is set to, for example, 15 seconds.

The operation of the magnetic tape for testing the song interval detection device of this embodiment constructed as described above will be described below. When a magnetic tape composed of signals as shown in FIG. 2 is used in a tape recorder equipped with a track interval detection device, the track interval detection device detects the signal by first reproducing the first signal portion 11. Next, the tape runs and plays the first inter-track section 12, which is shorter than the inter-track detection time of the inter-track detection device, and in order to play the immediately next second signal section 13, the inter-track detection device does not output the song interval detection output signal. Next, when the second song interval 14 is played back, since the time is longer than the song interval detection time of the song gap detection device, the tape recorder outputs a song gap detection output signal, and the tape recorder stops tape running based on this song gap detection signal. It is possible to change the operation mode, etc. If the song interval detection time of the song interval detection device is longer than the allowable value, the second song interval detection signal is not outputted, and if the song interval detection time is shorter than the allowable value, the first song interval detection signal is not outputted. In order to output a song detection signal in the song gap 12, by observing the operation mode of the tape recorder, it is determined whether the tape recorder does not operate in the first song gap 12 and operates in the second song gap 14. It is possible to guarantee that the inter-song detection device has a normal inter-song detection time. Furthermore, by configuring the second signal section 13 and the third signal section 15 with different signals, when the song interval detection device operates, the tape recorder is put into the playback mode and the signal to be played next is activated. By observing, the first
It is possible to determine whether the operation occurred during the inter-song section 12 or the second inter-song section 14. Therefore, when the song interval detection device does not operate, it is the case that the song interval of the song interval detection device is longer than the allowable value, and the song interval detection device operates and then the second signal section 1
3 is played back, the inter-song detection time is shorter than the allowable value, and when the inter-song detection device operates and the third signal section 15 is then played back, the inter-song detection time is within the allowable value. It can be determined that

As described above, according to this embodiment, (1) When the song interval detection device does not work.

(2) The song interval detection device operates, and then the second signal section 1
3 is played.

(3) The song interval detection device operates, and then the third signal section 1
5 is played.

By observing which of these three methods is present, it is guaranteed that the inter-track detection device always operates during the inter-song portions of music tapes, etc., and that the inter-track detection device does not malfunction during the middle of the song. In addition, if the inter-musical detection time of the inter-musical detection device is not appropriate, it is possible to determine whether the inter-musical detection time is too long or too short without using a special measuring device or the like.

Effects of the Invention As described above, the present invention is capable of detecting an interval between songs to be inspected without the need for the detection device to be inspected not to operate or for the signal portion to be subsequently reproduced after being operated to be the second signal portion. By confirming that the third signal section is always played back after the device operates, it is possible to know that the song detection time of the song detection device is within the allowable value, and It is possible to realize a magnetic tape for testing the song interval detection device, which can easily test the song gap detection device, since it can be guaranteed that the song will always operate during the song and will not malfunction in the middle of the song.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a recording signal of a magnetic tape for testing a conventional song interval detection device, and FIG. 2 is a diagram showing an example of a recording signal of a magnetic tape for testing a song gap detection device of the present invention. . DESCRIPTION OF SYMBOLS 11...First signal part, 12...First inter-musical part, 13...Second signal part, 14...Second inter-musical part, 15...Third signal part.

Claims (1)

[Claims] 1 a first signal section, a first inter-music section following the first signal section, a second signal section following the first inter-music section, and a second signal section following the second signal section. A signal composed of a song interval and a third signal portion following the second song interval is recorded, and the time of the first song interval is allowable by the song interval detection device to be inspected. The time of the second inter-song detection time is set to the minimum value of the inter-song detection time, and the time of the second inter-song portion is set to the maximum value of the inter-song detection time allowable by the inter-song detection device to be tested, and the second signal portion and A magnetic tape for testing a track interval detection device, characterized in that the third signal portion is recorded with a different signal.