JPS61283056A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To shorten a nonaudio time and to enjoy music in a pleasant atmosphere by recording a specific signal showing the termination of sound recording when such detection is made that a recorded sound is not outputted during the prescribed period and traversing automatically and quickly a tape when said specific signal is detected at reproduction. CONSTITUTION:An input signal is impressed on an amplifier 1, the prescribed current passing through a selector 2 and a buffer amplifier 3 is applied to a magnetic recording head 4, and a motor is driven to record a sound magnetically on the tape 8. Here, when that the tape is not recorded is detected, a tailing end display signal generator circuit 14 generates a specific tailing end display signal, which is recorded on the tape 8 through the selecter 2. At reproduction, the input signal magnetized from the tape 8 is read by a reproduction magnetic head 9, and reproduced through amplifiers 10 and 11. In this case, the tailing end display signal is detected, thereby traversing quickly the tape.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is directed to a magnetic tee 7° (hereinafter simply referred to as tape).
The present invention relates to a recording and reproducing apparatus, and more particularly, to a recording and reproducing apparatus that uses a cassette tape as a recording medium, and has an automatic tape fast-forward nine-way mechanism from the recording end position to the end of the tape.

(Prior art) In general, the recordable time for cassette and toteso is 45 minutes on both sides.
There are four types: minutes (46 minutes), 60 minutes, 90 minutes, and 120 minutes, and there are also special ones of 50 minutes, 54 minutes, and 80 minutes.

Even if you record using a wide variety of tapes,
There are often unrecorded parts that remain until the end of the tape, and especially when recording music by an individual, there is a surplus of several minutes to several minutes, and there is no sound during that period. Therefore, it is necessary to fast-forward the tape to the end in order to edit or play the next recorded part. In a conventional cassette tape recording/playback device, in order to automatically fast-forward the tape to the end, record something unnecessary in the silent section and press the tape program selector button (hereinafter referred to as TPS). There was no other way than to fast-forward using the software (called Getan).

(Problems to be Solved by the Invention) It is an object of the present invention to solve the inconvenience of the above-mentioned cassette tape recording and reproducing apparatus in which automatic fast-forwarding of silent parts is not possible.

(Means for Solving the Problems) The present invention solves the above-mentioned problems in cassette tape recording and playback devices by making it possible to stop recording when it is detected that no recording current is output for a certain period of time during recording. The present invention is solved by having a mechanism for recording a specific signal, and a mechanism for automatically fast-forwarding the magnetic tape to its end when the playback output of the specific signal is detected during playback. It is.

(Function) By adopting the above-described configuration, the present invention can automatically fast-forward the blank time after the recording of music or the like is completed, thereby allowing editing such as playback before the next recording. , or listening to music can be made easier and more convenient.

(Embodiment) The present invention will now be explained by way of an embodiment using the drawings. FIG. 1 is a block diagram showing the structure of a recording/reproducing apparatus according to an embodiment of the present invention. To record using this device, an input signal from a sound source (not shown) is applied to the amplifier 1, a required current is applied to the magnetic recording pin P4 through the selector 2, the buffer amplifier f3, etc., and the motor control circuit 5 Magnetic recording is carried out in the same manner as in the prior art on the tape 8 which is being run by a take-up roll 6.7 which is rotated directly or via a belt by a motor (not shown) whose drive is controlled. In the case of playback, as before, from tape 8,
The above-mentioned magnetized input signal is read out by the reproducing magnetic head 9, and is reproduced via the amplifier 10 and the output buffer amplifier 11. 12 is TPS +f methane, this operation activates the motor control circuit 5, which controls the winding roll 6.7
By controlling the rotation of the motor (not shown) that rotates the
You can fast forward CHI F8. In this state, if a silent part continues for more than about 4 seconds during normal tape running without fast-forwarding, the silent part detection section 13 detects this and
Skips and plays one song on the record. This interlaced playback can be performed any number of times by counting the output of the silent portion detection section 13.

The above operation is the same as that of conventional TPS except for selector 2.
, the same as in the case of a cassette deck with an N button.In addition to the above-mentioned mechanism, the present invention detects the non-recording state of the tape and generates a special end-of-line indication signal in the end-of-day indication signal generation circuit 14. It is constructed so that it is recorded on the tape 8 via the selector 2 in the same way as in normal recording, and the tape is fast-forwarded by detecting the end indicating signal during playback.

Figure 2 shows the generation structure of the termination indication signal in detail. Figures (,) and (b) respectively show the sending part and the receiving part of the termination indication signal, and correspond to Figure 1. The parts shown are indicated by dotted boxes using the same reference numerals. Now, Cn in the termination indication signal generation circuit 14 surrounded by a dotted line is a termination indication signal generation control section including, for example, a touch switch.By pressing this, the output of the selector 2 is turned to O (zero, silent) for about 4 seconds. It is possible to send a signal to This can be done by not operating the clock generation circuit Ck and by sending the output of the phase encoder Pe to the buffer amplifier 3 instead of the output of the amplifier 1, and the recording head 4 (Fig. 1) records about 4 silent parts on the tape. recorded for seconds. Next, 32 clock signals from the clock generation circuit Ck cause the same code to be read four times from the 8-bit code generator Bi. As this 8-bit code, for example, Fleming code r1110010
0J can be used, or a 32-bit set of codes may be used. If the clock width force is 1 kHz, it is 32 m5ec.
This signal ends.

Pe is a phase encoder used for data cassettes, a clock generation circuit Ck, a code generator Bi, etc.
A phase encoding clock synchronized with the clock of 32 above
Record the bit signal. During reproduction, the reproduction head 9 first detects the silent portion (non-recorded portion) recorded as described above. When the output from the amplifier 10 disappears for about 4 seconds, a set/-, 6 pulse is generated from the silence detection circuit Dt (silence detection section 13), and the flip-flop FF
1, and the Q output becomes H level.

As a result, the analog (AND) Gt in the termination indicating signal detection circuit 15 becomes conductive, and the output of the amplifier 10 is applied to the phase decoder Pd. The 32-bit G signal after the silent part is phase encoded as mentioned above, so
Since it is not affected by wow and flutter, it can be reproduced correctly by the phase decoder Pd.

The code matching circuit Fc compares the 8 bits from the beginning, and outputs a matching pulse every time there is a match, which is counted 3 times (or even 2 times) by the match counter Cs and resets FF 1 with the output. . In this way, the match count counter Cs is set to the flip-flop FF.
If it is set to be cleared by the Q output of flip-flop FF 1, the match counter Cs will operate only when the Q output of flip-flop FF 1 is at H level, and will sequentially count the number of matches from the beginning of the 8-bit data after the silent part. Count as 1.2.3... The output sets the flip-flop FF 2, and when the Q output becomes H level, the motor control circuit 5 controls a motor (not shown) to move the take-up reel 6.7 into a fast-forward state using a mechanism similar to the conventional one. The tape 8 is wound halfway to the end, and the motor is stopped when the winding point is detected, and the fast forwarding is completed.

Although the present invention has been described above, 1. The running of the tape 8 may be reversed to the arrow shown in FIG. ), terminal display code (2),
It takes about 4 seconds to form the silent part (2) in the silent part (3), about 1 second to form the silent part (1) and (3), and the end display code (
For 1) and (2), the order of the data may be reversed. The end display code uses an 8-bit Fleming code four times, and detects three or more times as the criterion, so it can be used in combination with the clock frequency and phase encode.
It can be said that there is almost no signal in random noise, natural sounds, music, etc., and therefore there is almost no possibility that a malfunction will occur due to the termination indicating signal.

As is clear from the above detailed explanation, the present invention enables automatic tape fast forwarding from the end of recording to the end of the tape, regardless of the length of the remaining tape of the Kanachinototegu. When combined with a mechanism, it allows continuous playback of both sides of a tape, and when listening to a car stereo in a car, it can be set to the next playback position without manual intervention, reducing silent time and allowing you to enjoy the playback sound. Note that silence can be detected even during normal playback, so normal playback can be performed. Further, the order of the end display codes (1) and (2) when the tape running is reversed from that in FIG. 1 as described above is ignored at the time of verification, so there is no problem. Even if the end indication code is recorded, when recording further in the direction of the end, if the tape is run in the recording state from about 4 seconds before the end indication code, the end indication code will disappear and there will be no problem.

(Effects of the Invention) As can be seen from the above description, the present invention automatically fast-forwards the unrecorded tape portion after recording in a cassette tape recording/playback device. When enjoying a car stereo inside the car, the silent time is shortened, so you can enjoy music etc. on both sides of the cassette for a long time without the danger of operating the car.
High practical value.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a block diagram showing the main parts thereof in detail. 12... TPS (Chief f rodaram selector) button, 13... Silent part detection section, 14... Termination display signal control section, Ck... Clock generation circuit, Cs...
Match count counter, Dt...; Silence detection circuit, FFI
...Flip flop 7'l, FF2...Flip flop 7'2. Fc... code verification circuit, Gt... dart, Pd... phase decoder, Pe... phase encoder.

Claims (1)

[Claims] In a recording/playback device using a cassette magnetic tape as a recording medium, the configuration detects that a recording current is not output for a certain period of time during recording and records a specific signal, and the playback output of the specific signal during playback. 1. A recording and reproducing device characterized by comprising a configuration that, when a magnetic tape is detected, automatically moves the magnetic tape in fast forward motion to a terminal end.