JPS592979B2 - magnetic tape playback device - Google Patents

Description

[Detailed Description of the Invention] The present invention is designed to automatically search or selectively reproduce information such as audio signals and data signals recorded on a magnetic tape. Regarding a magnetic tape playback device that uses position signals, in particular, the handling is facilitated by displaying an instruction indicating the direction of operation to be performed next based on the correspondence between the number of information desired for selective playback and the current tape position. It is an object of the present invention to provide a magnetic tape reproducing device which is easy to use and has extremely few erroneous operations.

For example, as a device that performs selective reproduction using a position signal recorded in a no-signal portion between information or at the beginning of information,
Set the number of the information you wish to play and press the PLAY (play) button and the FF (fast forward) or 10REW (rewind) button at the same time. When a predetermined position signal (including a no-signal part) is detected, the FF button will be pressed. Alternatively, only the REW button returns and playback automatically starts from the beginning of the desired information.

15 In this case, it is necessary to consider the relationship between the information number and the current tape position, select and operate the operation button, and if the operation button is pressed incorrectly, the tape position will gradually become further away from the desired information, and automatic selection playback will be performed. I had a problem where I couldn't do anything.

20 The present invention was made in view of such problems,
The current tape position is compared with the number of the information desired to be reproduced, and the operation button to be operated next can be displayed.

Hereinafter, the present invention will be explained based on illustrated embodiments.

25 In the drawing, 1 is an address specifying means for setting the address of information desired to be reproduced, 2 is a specified address register for storing the address specified by the address specifying means 1, and 3 is a magnetic head, an amplifier circuit, and a rectifier. A position signal reproducing means constituted by a circuit, etc.; 4 is a tape position register for storing the position signal reproduced by the position signal reproducing means 3; 5 is an output A of the designated address register 2 and an output B of the tape position register 4; is input, compare the two, A<B, A=B
, output A>B to each output terminal35
The comparison means 6 is an inverter connected to the A<B output terminal of the comparison means 5, and lights up the REW direction indicator lamp 7.

Reference numeral 8 denotes an inverter connected to the A>B1, output terminal of the comparing means 5, and lights the FF direction indicator lamp 9.

Reference numeral 10 denotes an inverter connected to the A-B output terminal of the comparing means 5, which drives the plunger 12 via the transistor switch 11.

On the other hand, a part of the output of the designated address register 2 is sent to the decoder 13.
The numeric display means 14 is driven via the numeral display means 14 to display the designated address.

Also, part of the output of the tape position register 4 is sent to the decoder 1.
5 to drive the numerical display means 16 to display the tape position. Although there are a plurality of output lines from the designated address register 2, tape position register 4, and decoders 13 and 15, they are abbreviated with bold lines. Next, the operation of this embodiment will be explained.

First, the address specifying means 1 sets the address at which reproduction is desired. For example, when address 5 is set, the content of the designated address register 2 becomes [5], and the number display means 14 displays "5" via the decoder 13. On the other hand, if the tape position is, for example, the start end, the content of the designated address register 2 becomes [5]. The output is “O
", and the number display means 16 via the decoder 15 displays "
"O" is displayed.

On the other hand, the A input of the comparing means 5 is "5", the B input is "O", the A>B output terminal becomes "H", and the FF direction indicator lamp 9 is turned on via the inverter 8.

Therefore, it is sufficient to press the PLAY button and the FF button at the same time to fast-forward the tape. As the tape runs and position signals are sequentially reproduced by the position signal reproducing means 3, the contents of the tape position register 4 increase sequentially, and the contents of the number display means 16 also increase sequentially. Then, when the content of the tape position register 4 becomes "5", if A>B output of the comparison means 5 becomes L, the FF direction indicator lamp 9 goes out and the A-B
The output becomes 1H, and the plunger 12 is driven via the inverter 10 and the transistor switch 11 to enter the PLAY state, and the information corresponding to address 5 is reproduced. Next, for example, when "2" is set by the address designation means 1, the designated address register 2 stores "2", and the number display means 14 displays "2" via the decoder 13.

The A input of the comparing means 5 is "2" and the B input is "5", and the A<B output terminal becomes "H", and the REW direction indicator lamp 7 lights up via the inverter 6. Therefore, P
When the LAY button and the REW button are pressed simultaneously to rewind the tape, position signals are sequentially reproduced by the position signal reproducing means 3 in the same manner as described above. Then, the contents of tape position register 4 decrease sequentially, and when it reaches "2", REW is started.
The direction indicator lamp 7 goes out, the A and B output terminals become "H", and the plunger 12 is driven 1 in the same way as above.
A transition is made to the reproduction state of information corresponding to the desired second address. Without the direction indicator lamps 7 and 9, it would be necessary to consider the size relationship between the desired address number and the current tape position, and then operate the FF or REW button.If you accidentally operate the wrong button, The desired information and the tape position keep getting farther apart, and no matter how long it takes, the tape is not in a playback state.

Note that if the REW direction indicator lamp 7 and the FF direction indicator lamp 9 are installed near the REW button and the FF button, respectively, the effect will be increased.

As described above, according to the present invention, it is possible to indicate the operation button to be operated next based on the correspondence between the tape position of information for which automatic selective reproduction is desired and the current tape position, which facilitates handling. Accordingly, it is possible to provide a magnetic tape reproducing apparatus capable of performing selective reproduction with extremely few erroneous operations.

[Brief explanation of drawings]

The drawings are main part block diagrams of one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Address designation means, 2... Designation address register, 3... Position signal reproduction means, 4...
...Tape position register, 5...Comparison means,
7...REW direction indicator lamp, 9...
FF direction indicator lamp.

Claims (1)

[Claims] 1. A magnetic tape playback system that searches for information and selectively plays back information by detecting a positional signal recorded at the beginning or the no-signal portion existing between information recorded on a magnetic tape. A magnetic tape playback device, characterized in that it is configured to display an instruction indicating the operating direction to be operated for selective playback based on the correspondence between the tape position desired for selective playback and the current tape position. Device. 2. If the desired tape position for selective playback is A and the current tape position is B, compare them and display the rewind direction if A<B, and the fast forward direction if A>B. A magnetic tape reproducing device according to claim 1, characterized in that: