JPH0728617Y2 - Recording / playback device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is useful, for example, when it is necessary to repeatedly monitor the recorded contents or the reproduced contents for a specific period during recording or reproducing of a tape recorder. The present invention relates to a recording / reproducing device.

[Outline of device]

The recording / reproducing apparatus of the present invention is capable of A / D converting a signal being recorded or reproduced, recording the same in a semiconductor memory, and reading a digital signal recorded in the semiconductor memory at an arbitrary point of time during recording. Is capable of repeatedly outputting the monitor sound of the recorded content or the reproduced content for a specific period without stopping the recording operation and rewinding the tape during the reproduction.

[Conventional technology]

When playing back with a tape recorder or the like, there is a case where it is desired to listen to and check only a specific period of the play back content (repeat monitor, repeat play). In such a case, conventionally, the tape rewinding operation is performed to reproduce the recorded content.

However, such an operation of mechanically stopping the tape running and rewinding has a problem that the tape rewinding amount is not stable and the running mechanism is complicated.

Therefore, at the time of reproduction, for example, the signal being reproduced is A-
A method has also been proposed in which a fixed amount of data is always D-converted and recorded in a solid-state memory (semiconductor memory), and a repeat reproduction function for extracting a past reproduction signal from the semiconductor memory at a desired time is provided. (Japanese Patent Laid-Open No. 61-184703) [Problems to be Solved by the Invention] By using a tape recorder having such a solid-state recording function, as described above, rewinding is performed at the time of reproduction. It is possible to re-output the playback content for a specific period without requiring mechanical operations such as
For example, when recording important conference content or explanation content, it may be necessary to confirm whether or not this important content is recorded even during recording. In this case, switching to playback mode interrupts the recording content. It is not preferable.

[Means to solve the problem and its action]

The present invention has been made for the purpose of solving such a problem, and at the same time as outputting a monitor signal at the time of recording and a reproduction signal at the time of reproduction from an output means such as a speaker, always stores a fixed amount in a semiconductor memory. , When a repeat operation is required, recording is continued during recording, reproduction is interrupted during reproduction, and the information stored in the semiconductor memory is read out as a repeat monitor signal or a repeat reproduction signal. It can be output from a speaker or the like.

〔Example〕

 Hereinafter, the present invention will be described based on the following embodiments.

FIG. 1 is a block diagram of a recording / playback system showing an embodiment when the present invention is applied to a tape recorder. 1 is a tape, 2 is a magnetic head for recording and playback, 3 is a microphone, and 4A is a repeat operation. Switches for switching, switches 4B to 4D for switching between recording and playback, 5 is a speaker, 6 is a connection terminal for headphones or the like, 7 is a preamplifier, 8 is a recording amplifier,
Reference numeral 9 is a reproduction amplifier, and 10 is a power amplifier. 11 is a monitor signal or a reproduction signal is converted into a digital signal (ADPCM)
Then, for example, an A / D converter that supplies the semiconductor memory 12 (D-RAM) and a D / D converter that converts the digital signal read from the semiconductor memory 12 into an analog signal and outputs the analog signal during a repeat monitor or repeat reproduction operation. This is a signal processing circuit with a built-in A converter and other components.

Reference numeral 13 controls the signal processing circuit 11 and also writes / writes address data to / from the semiconductor memory 12.
3 shows a controller that supplies a read signal and the like.

This controller 13 is, for example, a clock signal generator 13
A, a sequencer 13B, an address generator 13C, etc. are built in so that various control signals related to the operation buttons of the tape recorder can be input by the switch S and the signals can be output to the control circuit 14 for the tape drive motor M. Has been done.

The recording / reproducing apparatus of the present invention has such a configuration. First, during normal recording, the switch 4A is set to the a contact.
The switches 4B-4D are connected to the R contacts. For this reason,
The input signal from the microphone 3 is recorded on the tape 1 via the amplifiers 7 and 8 and the magnetic head 2 and is also supplied to the headphones connected to the connection terminal 6 via the switches 4B and 4A and the power amplifier 10. , You can monitor the recording. Further, a part of the monitor signal that has passed through the switch 4B is supplied to the signal processing circuit 11 via the switch 4C, AD converted, and recorded in the semiconductor memory 12.

The amount of signals recorded in the semiconductor memory 12 varies depending on the capacity of the memory and the sampling frequency, but it may be set so as to have a storage capacity that is practically suitable for the repeat monitor and repeat reproduction.

In this recording state, for example, when the monitor sound is missed, the repeat monitor operation can be performed to repeat the monitor sound without interrupting the recording. For example, when the repeat monitor switch S is turned on at time T _{1 in} FIG. 2 (a), the controller 13 is controlled, the switch 4A is connected to the b contact, and the repeat monitor mode is set.

That is, when the repeat monitor is controlled at the time point T ₁ , the semiconductor memory 12 is controlled to the read mode, and when the storage time of the semiconductor memory 12 is t, the past recording signal between T _{0 and} T _{1 is} output from the controller 13. On the basis of the above command, the signal is output to the signal processing circuit 11 and is D / A converted, and the audio signal recorded in the past is output from the headphone terminal 6 as a repeat of the monitor audio. Here, when the user listens to the repeat monitor audio during recording and hears that important items are recorded (at T ₂ ) and then cancels the repeat monitor mode, switch 4A switches to the a contact again. The semiconductor memory is connected and at the same time the semiconductor memory is controlled to the recording mode. Then, the recording monitor signal after the time point T ₂ is the headphone terminal 6
Etc., and at the same time, a part thereof is AD converted and recorded in the semiconductor memory 12.

In the repeat monitor mode, reading can be performed repeatedly with a pause period Δt.

During playback operation, switches 4B-4D are
It is connected to the PB contact, and the switch 4A is connected to the a contact. Therefore, the reproduction signal from the head 2 is
While being output from the speaker 5 and the like via the amplifiers 9 and 10, a part of the reproduced signal is AD converted by the signal processing circuit 11 and recorded in the semiconductor memory 12.

Here, when repeat reproduction is necessary, for example, the second
By turning on the switch S at the time T _{1 in the} figure (b), the controller 13 is controlled in the same manner as during recording, and the switch 13
4A is connected to the b contact, and the information between T _{0 and} T ₁ recorded in the semiconductor memory 12 is repeatedly output with the pause period Δt added. Since the controller 13 sends a signal to the control circuit 14 to stop the drive motor M at the time of this repeat reproduction, the tape reproduction is performed from the position interrupted at T ₁ no matter which point the repeat reproduction mode is released. become.

By stopping the drive motor M and then reversing it slightly, it is possible to eliminate the sound interruption when returning to the normal reproduction mode.

As described above, the recording / reproducing apparatus of the present invention enables the repeat operation using the semiconductor memory 12 at both the time of recording and the time of reproducing, and particularly the recording action is interrupted at the time of recording. Without having to listen to the previous monitor sound repeatedly, it is extremely useful.

It should be noted that although the description has been made assuming that the information recorded in the semiconductor memory is repeatedly output (continuous repeat) for the sound during the repeat monitor or repeat reproduction, a mode selection switch or the like is provided, and the controller 13 and the switch 4 are provided.
By controlling A, the repeat monitor mode or repeat playback mode can be automatically canceled after the repeat output is made only once. It is possible to select whether the repeat is continuous repeat or single repeat beforehand. You can also

Further, the storage capacity of the semiconductor memory 12 may be set in advance by using a mode selection switch or the like by preparing several kinds of selection modes (for example, 4 seconds, 8 seconds, and 12 seconds can be selected). it can.

[Effect of device]

As described above, the recording / reproducing apparatus of the present invention enables both the repeat monitor at the time of recording and the repeat reproduction at the time of reproducing by using the semiconductor memory. The monitor sound can be repeated without interruption, which is extremely useful in practice.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a recording / reproducing apparatus of the present invention, and FIG. 2 is an explanatory diagram of a repeat monitor and repeat reproduction. In the figure, 4A to 4D are switches, 11 is a signal processing circuit, 12 is a semiconductor memory, and 13 is a controller.

Claims (1)

[Scope of utility model registration request] 1. A first switching means for selecting an external input signal and a reproduction signal from a recording medium; an A / D conversion means for converting the signal from the first switching means into a digital signal; Storage means for storing the digital signal converted by the D conversion means, D / A conversion means for converting the digital signal read from the storage means into an analog signal, an output from the first switching means and the above Second switching means for selecting an output signal of the D / A converting means, operation means for giving an instruction for a repeat monitor and an instruction for repeat reproduction, means for recording the external input signal on a recording medium, and A means for reproducing a reproduction signal is provided, and control for switching the first switching means to an external input signal at the time of recording, control for switching the first switching means to a reproduction signal from a recording medium at the time of recording, and When the repeat monitor is instructed, the second switching means is switched from the output signal from the first switching means to the output signal of the D / A conversion means, and
In the control of reading the past recording signal stored in the storage means, and when the repeat reproduction is instructed at the time of reproduction, the second switching means is caused to output D / from the output signal from the first switching means. A recording / reproducing apparatus comprising: control means for switching to the output signal of the A conversion means and for controlling the reading of past reproduction signals stored in the storage means.