JPH0248996B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention records a character string on a magnetic tape at any position on the same recording track as a track on which analog signals such as audio and video are recorded. In addition to displaying playback,
The recorded character string and the character string to be reproduced and displayed are compared and judged, and the recording position of the character string on the magnetic tape is detected according to the judgment content, and the analog signal is copied (dubbed). This invention relates to a magnetic tape editing device.

Conventionally, for example, when editing a magnetic tape by using two magnetic tape recording/playback devices, only analog audio signals are generally recorded on the magnetic tape on the playback side. Therefore, it is troublesome to know the number and title of the currently playing song, and it is therefore very time-consuming to search for and cue the song to be dubbed. did. In order to avoid this kind of trouble, a method has been developed in which the search signal in the non-signal portion between songs is used to control the running of the magnetic tape, thereby locating the beginning of the song to be listened to. However, there have been disadvantages in that it is not possible to accurately detect the intervals between songs for acoustic signal sources with a wide dynamic range, resulting in malfunctions, and it is not possible to specify the absolute position of the song to be searched. Furthermore, on the recording device side,
Each time the reproducing device searches for a song to be dubbed and performs reproduction, an operation related to tape running control is required, which has the disadvantage that editing operations become extremely troublesome.

The present invention has been made with the aim of eliminating the above-mentioned drawbacks. For example, the present invention records a character string data signal and a recording position recognition signal on the same track on which an acoustic signal of a magnetic tape is recorded. , while reproducing and displaying the thus recorded signal,
Magnetic tape editing that improves the operability of editing magnetic tape by automatically controlling tape running on the playback device and recording device sides by comparing and determining the played content and the content instructed to search. The purpose is to provide equipment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a circuit block diagram of a magnetic tape editing device according to an embodiment of the present invention, and FIG. 2 is a circuit block diagram of the above device.
A block diagram of the internal circuit of the CPU. Fig. 2 is a diagram showing an embodiment of a master tape on which each signal is created and recorded by the device shown in Fig. 1. Fig. 3 shows the circuit shown in Fig. 1. 2 is a flowchart showing the operation sequence of FIG.

The magnetic tape editing device of this embodiment shown in FIG. Column data modulation circuit 3, low frequency oscillator 4 (hereinafter abbreviated as OSC 4), recording signal switching circuit 5 (hereinafter abbreviated as switching circuit), recording amplifier 6, recording head 7, magnetic tape 8, playback head 9, playback amplifier 10, Character string data demodulation circuit 11, master side tape running mechanism controller 12 (hereinafter abbreviated as mechanical controller 12), low pass filter 13 (hereinafter abbreviated as LPF 13), A/D converter 14, keyboard 15, power amplifier 1
6, a speaker 17, a tape running mechanism controller 18 (hereinafter abbreviated as mechanical controller 18), a recording amplifier 19, a recording head 20, and a tape to be dubbed 21. The keyboard 15 is composed of a character input key string a, a character string recording command key b, a tape running control key c, and a dubbing song number designation numeric key string d.

As shown in FIG. 1, the CPU 1 includes a program counter 101, a program ROM 102, an instruction decoder 103, and a calculation unit
4. Latch 106, 107, 108, 10 for accumulator 105 and external interface
9, consists of receivers 110, 111, 112 and an address data register 113, which are sequentially specified by the program counter 101 and stored in the ROM 10.
Program instructions outputted from 2 are decoded by an instruction decoder 103 and processed through an accumulator 105, which will be described later. In other words, input from the keyboard 15 is inputted through a receiver 110, and the tape 1 is run through a latch. It controls the running of the tape 2 through the latch, outputs character string data through the latch 106, inputs character string data through the receiver, and inputs display character string data through the address data register. The recording signal is switched via the output latch, and the detection output of the recognition signal at the time of tape winding is input via the receiver to perform processing according to the program.

Below, referring to FIG. 3, the operation of creating and recording character strings and audio signals to create a master tape will be described.

The character string is created using the character input key string a on the keyboard 15. Now, when a character key is input (pressed), the CPU 1 receives the character code corresponding to the character key from the data bus A by pressing the character key on the keyboard 15, and receives the character code corresponding to the character key from the data bus A, as shown in FIG.
At position P1 in the flowchart, it is determined that there is an input based on the pressing of the character key, and the flowchart reaches P2. At P2, the input character code is transferred from the CPU 1 to the RAM 2 via the data bus B. The RAM 2 is a refresh memory for display characters, and this memory 2 is constructed so that its memory contents can be reproduced as characters on the display 2. Therefore, when a character key is input in response to the operation of character key a, the input characters are displayed on the display 2 in the input order, and by repeating this, a character string is created and displayed. It will be done.

Next, a case will be described in which a character string created in this manner is recorded on a magnetic tape. Recording of the character string is performed by pressing the character string recording command key b on the keyboard 15. When the CPU 1 determines that the input of the command key b is "Yes" at P3 of the flowchart, the operation procedure reaches P4 of the flowchart. First, a recording command signal is input from the CPU 1 to the switching circuit 5 via the control line D, and the OSC4 The switching circuit 6 is switched so that the signal F from the amplifier 6 is inputted to the amplifier 6.
Here, the OSC 4 is a low frequency signal oscillator, and oscillates at, for example, an inaudible low frequency of about 5 Hz.
Therefore, the low frequency signal from the OSC 4 is outputted to the output H of the switching circuit 5. This low frequency signal is used as a recognition signal indicating the recording position of the character string data on the magnetic tape, and is treated as a signal for searching the position of the character string data during reproduction.
When the signal to be recorded on the magnetic tape is set in the switching circuit, it reaches P5, and the recording run of tape A (referring to the tape recorded by the recording device on the left in Fig. 1) is switched from the CPU 1 to the mechanical controller 12. control bus J
The mechanical controller 12 performs a series of controls regarding the recording run of the tape A via the bus S, thereby starting recording. When the tape starts running, the flowchart reaches P6, and the low frequency signal that becomes the recognition signal is recorded via the recording amplifier 6 and the recording head 7 for a sufficient time (T seconds) to detect the recognition signal during playback. It is done. After T seconds, when the recording of the recognition signal is completed, the flowchart reaches P7, and the CPU 1 uses the recording command signal to input the character string data outputted from the modulation circuit 3 via the bus E to the amplifier 6. The switching circuit 5 is switched via the control line D. In this way, the flowchart reaches P8 and recording of character string data begins. The character string data is recorded by the CPU operating to read out the stored character string from the RAM 2 by repeating steps P1 and P2 of the flowchart and transfer it to the modulation circuit 3.
In the modulation circuit 3, the parallel character data transferred from the CPU 1 via the data bus C is converted into serial data, digitally modulated so that it can be recorded on a magnetic tape, and the square wave of the digitally modulated signal is converted into serial data. harmonic components etc. are also removed,
Furthermore, a coded signal for synchronization that can be read during reproduction is added to the digital signal and outputted from the switching circuit 5 to the amplifier 6. Since the digital signal modulation/demodulation method is an existing technology, a description thereof will be omitted. Therefore, by repeating the flowcharts P8 and P9, the character string is transferred repeatedly, and the continuous character string data from the modulation circuit 3 is inputted to the switching circuit via the bus E, and then amplified by the recording amplifier 6. After that, recording is sequentially performed on the magnetic tape 8 via the recording head 7. When the string data transfer is completed and all string data recording is completed,
CPU1 reaches P10 in the flowchart and tape A
Stop the recording run via the mechanical controller 12,
At P11, the switching circuit 5 is switched so that the signal recording content is recorded as a normal audio signal. on the other hand,
Normally, the input H to the recording amplifier 6 is connected to the recording side G of the audio signal by the switching circuit 5, so the recording of the audio signal is performed using the tape running control key C of the keyboard 2 as shown in the flow chart on P16 to P25. [FIG. 3 2] This is performed by controlling via the mechanical controller 12 in the same way as in conventional electromagnetic mechanism tape decks and the like.

As described above, the acoustic signal, character string data,
The character string recording position recognition signal is recorded on the same track of the magnetic tape 8, and thus a master tape is created.

FIG. 2 is a diagram showing one embodiment of a master tape created and recorded in this manner. In the same figure, 〓〓 is an acoustic signal, 〓〓 is a character string recording position recognition signal, ■ is each recording position of a character string data signal, A, E, C, and C are acoustic signal areas, A, U, O. ，
K indicates the inter-track area. The song number and title "1. Doremi no Uta" are recorded in Matake, and the actual song is recorded in the A part. Similarly, ko indicates the E part with the character string "2. Kuchinashi no Hana," sa indicates the Ka part with the string "3. Shiroi Guitar," and shi indicates the K part with the string "4. Setonohanayome." In this example, first create a character string for the song number and title indicating the part A using the character input key a, then record the recognition signal and the created character string using the character string recording key b, and then press the tape running control key for the part A. A case is shown in which the "Do-Re-Mi song" is recorded using C, and the following steps are repeated in the same manner, including creating and recording character strings and recording music.

Next, the reproduction operation of such a master tape will be explained.

When the master tape created as described above is rewound by the travel control key C in the keyboard 2 and the performance is started, the acoustic signal, character string data signal, and recognition signal reproduced by the reproduction head 9 are transmitted to the reproduction amplifier 10. After being amplified by the power amplifier 16, the acoustic signal is further amplified by the power amplifier 16 and reproduced as sound from the speaker 17. On the other hand, the character string data signal is input to the demodulation circuit 11 via the signal line L, demodulated into the original parallel character data before digital modulation, that is, the same character data as the data line C, and sent to the data line M to the CPU 1. Output via . The CPU 1 monitors whether or not there is a demodulation input M at P14, and if there is an input, the flowchart reaches P15 and receives the demodulated character code from the demodulation circuit 11 via the data line M. , transfer to RAM2. On display 2
Since the contents of RAM2 are displayed as characters, the reproduced character string is reproduced.

If the master tape in FIG. 2 is played from position A, the acoustic signal A is amplified by the power amplifier 16 and reproduced as sound from the speaker 17. Next, when the position C is reached, character string data is input at the position C, and the demodulation circuit 1
1 operates, the CPU 1 reads the demodulated character string data, and transfers it to the RAM 2, thereby reproducing the character string "2. Kuchinashinohana" on the display 2. Next, a dubbing operation using such a master tape will be explained. Dubbing is performed by directly specifying the song number to be copied using the numeric key sequence d. For example, suppose that the master tape has stopped at the position H. For example, when dubbing the second song "Kuchinashi no Hana", the number key string d
When the number key □2 inside is pressed, the CPU 1 determines the key at P13 of the flowchart and reaches P26. [Fig. 3 3] Therefore, first, a command is sent to the mechanical controller 18 to standby for recording the tape B (referring to the one used in the recording device on the right side in Fig. 1, or the magnetic tape 21) via the control line P. and enter recording standby. Next, reach P27 and transfer tape A to mechanical controller 1.
Rewind playback is performed via 2. It is assumed that the mechanical controller 12 performs control so that rewinding is performed while the reproducing head 9 remains in contact with the magnetic tape 8. When rewind playback begins, CPU1 reaches P28,
Here, the input of the recognition signal is monitored via the signal line Q. The recognition signal recorded on the master tape is a signal with a frequency of 5Hz by the OSC4, which means that the tape speed in the rewind state is normally 20~20~20 of the playing speed.
Since the signal is 30 times larger, it is reproduced via the reproduction head 9 and the reproduction amplifier 10 as a signal with a frequency of 100 to 150 Hz. On the other hand, the LPF 13 is a low pass filter, and this filter 13 has a cutoff frequency of 150 Hz for detecting the recognition signal. When rewinding and playback of the master tape begins, the playback head for the tape is in the ``h'' position, and if the audio signal is in the frequency range of 20Hz to 20KHz, the playback frequency is 20 to 30 times that, or 400KHz.
Therefore, the LPF 13 is connected via the signal line L.
no audible acoustic signal appears at the output. Next, when the reproducing head reaches a position in the recognition signal area in the region (K), the recognition signal is reproduced at 100 to 150Hz, so the LPF 13 operates and its output N is converted into a digital signal by the A/D converter 14. Output to signal line Q as a recognition signal. At this point, the CPU 1 confirms the recognition signal, the flowchart reaches P29, and the tape A is controlled to play via the mechanical controller 12. Since the character string data signal is recorded on tape A in succession to the recognition signal, the demodulation input is confirmed at P30 of the flowchart, and then, at P31 of the flowchart, the data is transferred to RAM2 as in the operation described above. Therefore, it is the character string data at the position of shi on the tape.
“4. Set no Hanayome” is displayed. Next, in P32, the first character of the RAM 2, that is, the number "4" indicating the song number, is taken into the accumulator 105, and in P33, the dubbing designated song number number inputted in P13 is subtracted. In the example, since the key □2 has been input, "2" is placed in the accumulator 105 with 4 minus 2, reaching P34, and the positive/negative is determined. This judgment is to determine the winding direction of the tape to be searched, and since the accumulator 105 is currently "2" and is a positive number, it reaches P35 and is incremented by 1.
The content of 05 is "3". Then, at P36, rewinding and playback control of tape A is commanded again, and the process reaches P40. Tape A is now after the character string data of ``shi'' has been played back, so the recognition signal in the area of ``ki'' is first rewound and played back, and after being judged in P40, the content of the accumulator 105 is changed to only 1 in P41. Subtracted. Since the content of the accumulator 105 was "3", the content becomes "2" as a result of the above subtraction, and since the content of the accumulator 105 is not φ at P42, the flowchart reaches P43, and the reproduction of the recognition signal is completed. After waiting, that is, after the reproduction of the recognition signal in the area of the inter-song area K is completed, P40 is reached again, and the above is repeated until the accumulator reaches φ. The content of the accumulator is Acc = 1 with the recognition signal, and Acc with the recognition signal within the area of the inter-song area C.
=φ and reaches P44. CPU1 in P44
controls the tape A to play through the mechanical controller 12, and in the music range
The second song, “Kuchinashi no Hana” was recorded.
After “2. Gardenia” is displayed on P45 and P46, the recording run of tape B is controlled via the mechanical controller 18 on P47, and the acoustic signal from the area E is amplified by the recording amplifier 19 and recorded. Recording is performed on the magnetic tape 21 by the head 20, and dubbing is started. Next, CPU1 waits until there is a demodulation input at P48, so dubbing continues until playback of the master tape reaches position S, and when S is input, it reaches P49.
Recording of tape B stops, and dubbing of the second song originally specified, ie, the song ``Kuchinashi no Hana'' in the area d, is completed. In this example, the recognition signal in the area O is also recorded, but for example, if the frequency band of the recording amplifier 19 is set to 20Hz,
There is no problem if the above method is used. Thereafter, by simply specifying the number of the song you wish to pick up from the master tape, the tape will be automatically searched and dubbed, allowing you to edit the tape.

The present invention eliminates the drawbacks of conventional magnetic tapes, such as the lack of information and the difficulty in position searching, and also automatically performs tape running control necessary for dubbing operations with simple key operations. This has a great effect on improving operability. Furthermore, operability can be further improved by providing a means for comparing character strings by song title, etc., and by providing a means for dubbing character strings, etc. onto the tape to be dubbed, marketability can be increased. Of course.

It should be noted that the above description is only one embodiment of the present invention, and it goes without saying that various embodiments can be implemented within the scope of the claims.

[Brief explanation of drawings]

FIG. 1 is a circuit block diagram of a magnetic tape editing device according to an embodiment of the present invention, FIG. 2 is a diagram showing an embodiment of a master tape on which each signal is recorded by the above device, and FIGS. , 3 is a flowchart showing the operation sequence in the circuit of FIG. 1... Microprocessor, 2... Reflex memory for dot matrix display and displayed characters, 3... Character string data modulation circuit, 4... Low frequency oscillator for character string recording position recognition signal, 5... Recording signal switching Circuit, 6, 19...Recording asp, 7,
20... Recording head, 8... Magnetic tape for master, 9... Playback head, 10... Playback amplifier, 1
1...Character string data demodulation circuit, 12, 18...Tape running mechanical controller, 13...Low pass filter, 14...A/D converter, 15...Keyboard, 16...Power amplifier, 17...Speaker, 21 ...Magnetic tape for dubbing, a...
Character string input key string, b...Character string recording specification key,
c...Tape running control key, d...Numeric key sequence for dubbing song number designation, A, U, O, K...Magnetic tape inter-track section, I, E, C, K...Magnetic tape audio signal recording section, K...I title string, K...
E title string, sa...ka title string, shi...k title string.

Claims (1)

[Scope of Claims] 1. Keyboard means for inputting character string data; Memory means for storing character string data input from the keyboard means; and recognition signal for generating a recognition signal for searching the recording position of the character string signal. generating means; a magnetic recording and reproducing device capable of recording and reproducing signals on a first magnetic tape and reproducing the first magnetic tape even in a high-speed running state; and a magnetic recording and reproducing device capable of recording and reproducing signals on a first magnetic tape; , the search recognition signal from the recognition signal generating means, the character string data from the memory means, and the sound signal from the sound source are sequentially supplied to the magnetic recording and reproducing device in this order, and recorded on the first magnetic tape. a switching circuit means for recording signals in that order; a magnetic recording device capable of recording signals on a second magnetic tape; and a magnetic recording device capable of recording signals on a second magnetic tape; means for detecting a retrieval recognition signal on the magnetic tape and setting the magnetic recording and reproducing device to a reproducing state based on the detection signal; determining means for determining the content of the character string data from the magnetic tape; means for setting the magnetic recording device to a recording state based on the determination result of the determining means; A magnetic tape editing device comprising means for supplying the acoustic signal being reproduced from a first magnetic tape in the magnetic recording and reproducing device to the magnetic recording device to record it on a second magnetic tape when in a recording state.