JPH0218702A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To stop unnecessary recording operation in a silent condition by generating a correspondent recording stop signal from a silence detecting function part to a magnetic recording and reproducing function part and stopping recording function when the silent condition exists for a prescribed time during the recording operation. CONSTITUTION:A magnetic recording and reproducing device 12 is composed of a silence detecting function part 12A and a magnetic recording and reproducing function part 12B. After a power source is inputted and other necessary processing is executed, the operation of the device is started. Next, by operating the function part to be needed for the recording operation, the necessary recording operation is started. While the necessary recording operation is executed, the presence or absence of the recording stop signal, which is mentioned later, is periodically decided. When a decided result is the 'presence', the recording operation is stopped and continuously, the operation of the whole device is stopped. Thus, the unnecessary recording operation of the device is stopped in the silent condition.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a magnetic recording/reproducing device, and in particular, when a silent state continues for a predetermined period of time during a recording operation. The present invention relates to a magnetic recording/reproducing device which generates a corresponding recording stop signal to a magnetic recording/reproducing function section to stop its recording function.

[Prior Art] FIG. 5 is an explanatory diagram of the operation of a conventional magnetic recording/reproducing apparatus of this type. In this FIG. 5, for example, DAT
A conventional CD reproducing device (51) is connected to a conventional magnetic recording/reproducing bag W (52) such as a device. Is the audio signal played by this CD playback device (51) a magnetic recording playback bag? 1f (52) side, and necessary recording is performed on the magnetic tape attached to the magnetic recording/reproducing device (52).

By the way, when the magnetic recording and reproducing device f (52) used for the above-mentioned recording is a DAT device, the total time required for reproduction on the CD reproducing device (51) side is the same as that of the magnetic recording and reproducing device L (52) III. Assuming that the time is shorter than the total time required to record a DAT tape, even if the playback signal from the CD playback device (51) disappears, the recording will be "silent" unless a prescribed measure is taken to stop the recording operation. The operation will continue. Then, such a recording operation is performed, and an AT tape with a silent section in the latter half is obtained. If an attempt is made to reproduce such an AT tape, it becomes impossible to distinguish between silent parts and sound parts, and even if the reproduction operation continues, there will be no reproduced sound.

In addition, in normal DA, T equipment, by distinguishing between recorded and non-recorded areas in the digital signal domain, various functions can be achieved, including a mode switching function called blank skip. However, as mentioned in 4 above, since it is impossible to distinguish between sound and non-sound in the recording section, the above function cannot be achieved.

Here, the blank skip refers to when a silent section continues for a predetermined period of time during a playback operation, and the operation mode of the magnetic recording/playback device is changed from the playback mode to the search mode (i.e., fast forward mode). mode), detects the next sound part in a short time, and returns to playback mode.

Therefore, when a silent section continues on an AT tape as described above, the function of automatically switching the DAT tape to the fast-forward mode cannot be achieved.

Note that such a switching function itself is provided in a normal device of this type.

[Problems to be Solved by the Invention] A conventional magnetic recording/reproducing device operates as described above. For example, assuming that there is a silent section in the latter half of a recorded DAT tape. , it becomes impossible to distinguish between the sound part and the sound part, and even if the playback operation continues, there will be no playback sound, and when such a non-recording part continues, the 81 ability of the fast forward mode will be activated. The problem was that it could not be done.

This invention has been made to solve the above-mentioned problems, and when a silence state exists for a predetermined period of time during the recording operation, a corresponding recording stop signal is sent from the silence detection function section. It is an object of the present invention to provide a magnetic recording/reproducing device which can cause a magnetic recording/reproducing function to stop its recording function.

[Means for Solving the Problems] A magnetic recording and reproducing device according to the present invention records and reproduces information on a magnetic tape, and is composed of a magnetic recording and reproducing function section and a silence detection function section. .

[Function] According to the present invention, when a silent state exists for a predetermined period of time during the recording operation, a corresponding recording stop 1 signal is generated from the silence detecting function section to the magnetic recording and reproducing function section 5. , the recording function is stopped.

[Examples] Next, the present invention will be described based on examples shown in the accompanying drawings.

FIG. 1 is a block diagram showing a magnetic recording/reproducing apparatus which is an embodiment of the present invention. In FIG. 1, an ordinary CD reproducing device W (11) is connected to a magnetic recording/reproducing bag W (12) such as a DAT device. This magnetic recording and reproducing bag fi (12) has a silence detection function section (1
2^) and a magnetic recording/reproducing function section (12B>).

FIG. 2 is a flowchart for explaining the operation of the above embodiment. In FIG. 2, the power is turned on and the necessary measures are taken to start the operation of the device (szi).

Next, by operating the functional parts necessary for the recording operation,
A required recording operation is started (S22), and while performing the required recording operation, the presence or absence of a recording stop signal, which will be described later, is periodically determined. If the result of the determination is "no", the process returns to step (S22) to continue the recording operation. On the other hand, if the result of the determination is "Yes", the recording operation is stopped (524), and the operation of the entire apparatus is subsequently stopped (S25).

FIG. 3 shows the silence detection function section (12^) in the above embodiment.
) is an illustrative diagram of the configuration. In FIG. 3, a pre-stage amplifier <31>, a first comparator (32), a game h (33>) serving as a timer function, and a second comparator (34)
) and a monostable multivibrator (35) in series to detect the silence 8! The Noh Department (12^) is comprised. In FIG. 3, a stereo audio signal is received, and an LCH audio signal is applied via a resistor R1, and an RCII audio signal is applied via a resistor R2, both of which are connected to a common capacitor. It is connected to the amplifier (31) in the preceding stage of the silence detection function section (12^) via the CI.

FIG. 4 is a diagram illustrating waveforms at each part of the silence detection function section (12^). In FIG. 4, an external audio signal A is applied to an amplifier (31) in the preceding stage of the silence detection function section 12^). This audio signal A
is suitably amplified and then applied to the (+) input terminal of the first comparator (32) and compared with the reference human power V1 from its (-) input terminal, and based on the result of this comparison, a predetermined level is set. A signal B causing a change is output. This signal B is applied to the next stage gate (33), and this gate (33) outputs a signal C that gradually rises as the level of the signal B changes. This gradually rising signal C is applied to the +) input terminal of the second comparator (34), and the reference human power from its (-) input terminal is
2, and a signal that rises based on the result of this comparison and causes a predetermined level change is output. This signal is applied to a monostable multivibrator (35) at the subsequent stage, and a signal E in the form of a single pulse is output in response to the rise of the signal.

This signal E is used as a recording stop signal and is applied to the magnetic recording/reproducing function section (12D). By applying this signal E, the recording function in the magnetic recording/reproducing function section (12B) is stopped, and the unnecessary recording operation of the device in the silent state is stopped.

[Effects of the Invention] As explained above, the magnetic recording and reproducing device according to the present invention records and reproduces information on a magnetic tape, and is composed of a magnetic recording and reproducing function section and a silence detection function section. , when a silent state exists for a predetermined period of time during the recording operation, a corresponding recording stop signal is generated from the silence detection function section to the magnetic recording and reproducing function section to stop the recording function. As a result, unnecessary recording operations of the magnetic recording/reproducing apparatus in the silent state are stopped. In addition, the above-mentioned recording (recording) t! Even if the operator leaves his/her seat after starting the recording, the recording operation will surely stop after a predetermined period of time when there are no more signals to be recorded, so there will be no sound. This prevents unnecessary recording operations in the state. Furthermore, when reproducing a signal from a different CD and restarting the recording operation, the recording (
It is also easy to find the starting point (recording).

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a magnetic recording and reproducing apparatus which is an embodiment of the present invention, FIG. 2 is a flowchart for explaining the operation of the above embodiment, and FIG. 3 is a silent FIG. 4 is a diagram illustrating the configuration of the detection function section, FIG. 4 is a diagram illustrating waveforms in each part of the silence detection function section, and FIG. 5 is a block diagram showing a conventional magnetic recording/reproducing apparatus. (11) is a CD playback device, (12) is a magnetic recording and playback device, (12^) is a silence detection function section, and (12B) is a magnetic recording and playback function section.

Claims (1)

[Claims] (1) A magnetic recording and reproducing device that records and reproduces information on a magnetic tape consists of a magnetic recording and reproducing function section and a silence detection function section, and is capable of responding when a silence state exists for a predetermined period of time during recording operation. A magnetic recording/reproducing apparatus characterized in that a recording stop signal is generated from the silence detecting function section to the magnetic recording/reproducing function section to stop the recording function.