JPH0676552A - Recording/reproducing device - Google Patents

Abstract

(57) [Summary] [Purpose] To be able to easily and accurately confirm whether or not the recording was done correctly. [Structure] A recording means 4 and a reproducing head 5 are arranged apart from each other so that a recorded signal can be reproduced immediately after, and a recording means 12 capable of storing a recording signal supplied to the recording head 4. The storage read timing (τ ₂ ) of the storage means 12 is controlled so that the stored recording signal is read after a lapse of a delay time (τ ₁ ) according to the distance between the recording head 4 and the reproducing head 5 and the tape running speed. The storage control means 13 and 22, the comparison means 18 for comparing the reproduction signal read by the reproduction head 5 with the recording signal read from the storage means 12, and the error presentation according to the comparison result by the comparison means. The recording / reproducing apparatus is configured so as to have warning means (30 to 34) capable of performing the above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus having a recording medium such as a magnetic tape or a disk.

[0002]

2. Description of the Related Art A recording / reproducing apparatus using a magnetic tape as a recording medium, such as a compact cassette tape, is widely used and is used for easy voice recording. When recording a music performance, a conversation, an interview voice or the like with such a recording / reproducing apparatus, it is preferable to be able to confirm at the same time as the recording whether or not the recording is properly executed.

From such a request, for example, a recording head,
In a so-called 3-head recorder in which a reproducing head and an erasing head are independently provided, the fact that the reproducing operation can be performed at the same time as recording is used to reproduce the signal immediately after recording by the recording head by the reproducing head and to output it as monitor sound. It is known that output is possible.

[0004]

However, such a voice monitor system has a problem that the user must listen to the monitor voice from beginning to end during the recording operation, which is not a simple and easy recording confirmation system. It was Of course, in order to confirm the recording error accurately, it is necessary to monitor with considerable caution, and it is not always possible to confirm properly.

When the speaker or performer's self-confidence must be monitored, the distance between the recording head and the reproducing head and the tape running distance between the actual utterance or performance voice and the reproduced monitor voice. There will be a time delay due to speed. For example, the monitor sound is 1 depending on the device.
It may be delayed by about a second. There is also a problem that it is very difficult to continue playing or uttering correctly while listening to such monitor voice, and in practice, the confirmation of the recording state by the monitor voice is often not executed.

[0006]

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a recording / reproducing apparatus capable of easily and accurately confirming a recording state.

That is, the recording head portion and the reproducing head portion are separated from each other by a predetermined distance, that is, they are arranged as separate bodies so that the recorded signal can be reproduced immediately after the recording head portion and the recording signal supplied to the recording head portion. And a storage unit for storing the recording signal stored in the storage unit so that the recording signal stored in the storage unit is read out after a predetermined time corresponding to the distance between the recording head unit and the reproducing head unit and the recording / reproducing linear velocity of the recording medium. Storage control means for controlling the storage and reading operation of the recording head, comparison means for comparing the reproduction signal read by the reproduction head unit with the recording signal read from the storage means, and error presentation according to the comparison result by the comparison means. The recording / reproducing apparatus is configured to have a warning means that can be performed.

The warning means is provided as a display means for displaying the error occurrence frequency within a predetermined unit time.
Alternatively, the configuration is such that an error warning display or an error warning sound is generated according to the detection of the occurrence of an error.

[0009]

If the recording signal to be supplied to the recording head and the reproducing signal reproduced by the reproducing head immediately after being recorded are matched in timing, it is possible to automatically determine whether or not the recording is properly performed. Does not have to keep listening to the monitor audio.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the essential parts of an embodiment of a recording / reproducing apparatus of the present invention. Reference numeral 1 denotes a magnetic tape such as a compact cassette tape or a microcassette tape. At the time of recording, the magnetic tape 1 is run at a predetermined speed, and a recording audio signal supplied from an input terminal 2 is processed by a recording equalizer 3. After that, it is supplied to the recording head 4 and recorded on the magnetic tape 1.

Reference numeral 5 denotes a reproducing head, which is separate from the recording head 4 and is arranged at a predetermined distance.
At the time of reproduction, a reproduction signal is taken out from the reproduction head 5 as the magnetic tape 1 travels, and is amplified in the reproduction processing unit 6.
Processing such as equalizing is performed, and the reproduced audio signal is output from the output terminal 7.

Reference numeral 10 is a recording error detecting section which is composed of, for example, a microcomputer. Reference numeral 11 is an A / D converter, which simultaneously supplies a recording signal to be supplied to the recording head 4 from the input terminal 2 and converts the recording signal into digital data.

Reference numeral 12 denotes a RAM, to which digital data from the A / D converter 11 is supplied. Writing / reading timing and address control in the RAM 12 are executed by the memory controller 13. The RAM 12 only needs to have a data storage capacity for at least a predetermined time corresponding to τ ₂ described later, and does not have to have a large capacity. RAM12
The data read from is stored in the register 15 in the comparison operation unit 14.

On the other hand, 16 is an A / D converter for converting the signal reproduced from the reproducing head 5 into digital data,
The digital data from the A / D converter 16 is the comparison calculation unit 1
It is held in the register 17 in 4.

Reference numeral 18 denotes a comparison unit for comparing the data held in the registers 15 and 17 and outputting comparison information indicating whether or not they match. The mismatch information from the comparison unit 18 becomes error occurrence information.

Reference numeral 19 denotes an integrator, which performs an integration process within a unit time on the disagreement information output from the comparison unit 18, that is, the error occurrence information, and calculates the error occurrence rate. The unit time for calculating the error generation rate is obtained by dividing the system clock CK from the clock generation unit 21 in the microcomputer by the frequency divider 20.

Reference numeral 22 denotes a timing adjusting unit, which is the RAM 1
The time interval from the data writing to the data reading in 2 is set. The memory controller 13 is a RAM based on the timing setting by the timing adjusting unit 22.
12 write / read control is performed.

At the time of recording, the reproduced audio signal read from the reproducing head 5 immediately after being recorded by the recording head 4 has a predetermined time (τ) from the recorded audio signal from the input terminal 2.
₁ ) Only delayed. That is, there is a delay time determined by the distance between the recording head 4 and the reproducing head 5 and the running speed of the magnetic tape 1.

In the comparing section 18, the occurrence of a recording error cannot be determined unless the corresponding data in the recorded signal and the corresponding data in the reproduced signal are accurately compared. Therefore, the memory controller 13 causes the RAM 12 to correspond to the delay time τ _1.
Control the delay time (time from writing of certain data to reading) τ ₂ . So τ ₁ = τ ₂ is set. As control data for this, τ ₂ (= τ
₁ ) is held in the timing adjustment unit 22. In addition,
When the tape running speed is variable like a microcassette tape, a plurality of types of τ ₂ are prepared accordingly and used according to the running mode.

In the recording error detection unit 10, the input recording signal and the reproduction signal which is the recording monitor signal are controlled at the same timing and sequentially compared by the comparison unit 18, so that the comparison result does not match. If is detected, it can be determined that a recording error has occurred. However, due to the recording process in the recording equalizer 3 and the recording / reproducing characteristics of the magnetic tape, it is almost impossible to make a perfect match at the digital data stage, so that the comparison unit 18 needs to set a certain range to be a match. There is.

The output of the comparison section 18 is supplied to the warning driver 30. When the warning driver 30 receives the disagreement information (error occurrence information) from the comparison unit 18, the warning driver 30 receives, for example, LE.
By driving the error indicator 31 such as D to emit light or outputting an alarm sound from the speaker 32, the user is notified that a recording error has occurred.

Information (numerical value) of the error occurrence frequency within a unit time is output from the integrator 19 which performs an integration process on the output of the comparator 18, which is supplied to the display driver 33. For example, in the display unit 34 configured by liquid crystal display means or LED display means, the error occurrence frequency is displayed as a numerical value, or by a bar (level) or meter display according to the numerical value, or by another display form. It is presented to the user one after another. Therefore, the user
The error occurrence or occurrence frequency may be confirmed, and it may be determined whether or not the recording is redone according to the situation.

FIG. 2 shows another embodiment of the present invention.
The recording error detector is configured without using a microcomputer.

In this case, the recording signal from the input terminal 2 is A
The data stored in the RAM 12 via the / D converter 11 and read out after τ ₂ time is converted again into an analog signal in the D / A converter 23 and input to the comparator 24. On the other hand, the reproduction signal reproduced from the reproduction head 5 is directly input to the comparator 24, and therefore the comparator 24 compares the recording signal and the reproduction signal for detecting a recording error.

As the comparator 24, for example, a differential amplifying means is adopted, and therefore an output according to the error level between the recording signal and the reproduction signal is taken out. The output corresponding to the error level is input to the comparator 25 and compared with the reference voltage V _ref obtained by the resistor R, for example. When the error level is higher than the reference voltage V _{ref, the} comparator 25 outputs, for example, an “L” signal, which is used as recording error occurrence information.

The output of the comparator 25 is the warning driver 3
Since the alarm driver 30 supplies the error occurrence information from the comparator 25, the warning driver 30 drives the error indicator 31 to emit light or output an alarm sound from the speaker 32.

The output of the comparator 25 is also supplied to the error rate calculating section 26, and is subjected to integration processing, for example, to calculate information on the error occurrence frequency within a unit time. Numerical information of the error occurrence frequency is supplied to the display driver 33 as in the above embodiment, and presented on the display unit 34 by numerical values or bar display.

Although each of the embodiments has been described above, it is not necessary to provide all of the error indicator 31, the speaker 32 for generating an alarm sound, and the display unit 34 as an error occurrence presenting means. Of course, the speaker 32 may also be used as a speaker for reproduced sound, or the error indicator 31 may be displayed by blinking using an existing recording indicator to express the error occurrence.

Further, it is preferable that the delay time in the RAM 12 be controlled more finely by detecting the tape running speed. In other words, since it is considered that the tape running varies considerably from the timing level of the comparison operation, in order to always accurately compare the corresponding data in the recording signal and the reproducing signal, the information from the tape running speed detecting means should be used. The timing adjustment section 22 outputs τ
It is preferable to finely adjust ₂ .

By performing the comparison processing of the recording signal and the reproduction signal as in the embodiment, not only the recording error occurrence detection but also the level difference and the frequency characteristic difference information can be obtained. It is also possible to feed back to the recording signal processing circuit (for example, the recording equalizer 3) to compensate the recording / reproducing characteristics of the magnetic tape 1. With this configuration, automatic compensation can be performed during recording without performing compensation adjustment according to tape characteristics using a special input signal before recording.

Although the recording / reproducing apparatus corresponding to the analog recording type magnetic tape has been described in the embodiments, the present invention can be naturally applied to a digital recording / reproducing apparatus. Further, not only the tape-shaped recording medium, but also the disk-shaped recording medium,
It can also be used as a recording / reproducing device for a card-shaped recording medium or the like.

[0032]

As described above, the recording / reproducing apparatus of the present invention detects the occurrence of a recording error by controlling the timing of the recorded signal and the reproduced signal immediately after recording and comparing the corresponding data, and the user Since there is no need for the user to constantly monitor the recording state during recording, the recording error can be accurately detected. In particular, since the detection is based on data comparison, it is possible to detect a recording error that is difficult for humans to detect, such as a short-time dropout. Further, since the user does not need to monitor the recording state, there is also an advantage that the recording state can be accurately confirmed even when recording his or her generated voice or performance voice.

Further, by presenting the error occurrence indication as the occurrence frequency information, there is an effect that an appropriate guide can be provided even when it is judged whether or not re-recording is necessary.

[Brief description of drawings]

FIG. 1 is a block diagram of a main part of an embodiment of a recording / reproducing apparatus of the present invention.

FIG. 2 is a block diagram of a main part of another embodiment of the recording / reproducing apparatus of the present invention.

[Explanation of symbols]

 1 magnetic tape 2 input terminal 4 recording head 5 reproducing head 12 RAM 13 memory controller 18 comparing section 19 integrator 24, 25 comparator 30 warning driver 31 error indicator 32 speaker 33 display driver 34 display section

Claims (3)

[Claims] 1. A recording head unit for recording a recording signal input to a recording medium, a reproducing head unit for reading a signal from the recording medium, the recording head unit being separated by a predetermined distance, and the recording head. A storage unit capable of storing a recording signal supplied to the recording unit, and the recording signal stored in the storage unit according to the distance between the recording head unit and the reproducing head unit and the recording / reproducing linear velocity of the recording medium. The storage control means for controlling the storage / reading operation of the storage means so as to be read out after a lapse of a predetermined time, the reproduction signal read by the reproduction head section, and the recording signal read out from the storage means are compared. A recording / reproducing apparatus comprising: a comparing unit; and a warning unit capable of presenting an error according to a comparison result by the comparing unit. 2. The recording / reproducing apparatus according to claim 1, wherein the warning means is provided as a display means for displaying an error occurrence frequency within a predetermined unit time. 3. The recording / reproducing apparatus according to claim 1, wherein the warning means is configured to generate an error warning display or an error warning sound in response to detection of occurrence of an error.