JPH0513358B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Technical Field of the Invention> The present invention relates to a data synchronous recording/reproducing device.

<Background Art> For example, when recording different data such as a music signal and images or characters on a magnetic tape, conventionally an operator manually inputs and records display data such as images or characters in synchronization with the timing of the music signal. I was using the method of saying.

Therefore, such conventional methods have the disadvantage that it is difficult to synchronize the timing between the two data in the time axis direction, and good synchronized recording cannot be performed.

<Object of the present invention> The present invention was invented in view of the drawbacks of the conventional devices described above, and includes inputting auxiliary data such as images or characters in advance using a key and storing them in a storage means.
Further, there is provided a data synchronized recording and reproducing device that can read out auxiliary data stored in the storage means and record it on a magnetic tape in synchronization with the recording or reproducing tempo of the main data when recording or reproducing main data such as a music signal. It is something that I try to do.

<Configuration of the Present Invention> An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a diagram showing the recording format of a magnetic tape T applied to the present invention.
is a track for display data such as musical note data, and track Tb is a track for music signals such as the melody of a certain song.

FIG. 2 is a block electric circuit showing an embodiment of the device according to the present invention. A recording circuit for recording on the tape T, 4 is a music signal reproducing head for reproducing music signals recorded on the magnetic tape T, and the head 4
The reproduced music signal is processed by a reproduction circuit 5, and then supplied from an output terminal 6 to an amplifier or a speaker drive circuit (not shown), where it is emitted as a musical tone.

7 is a keyboard for inputting musical note data, and is provided with replacement keys □0 to □9, pitch code key □T, and note length code □L, and a third key is provided for inputting musical notes.
According to the example shown in the figure and FIG. 4, one of the tone length or pitch code keys □L, □T and the replacement key is operated.

For example, to input musical notes like the one shown in Figure 5, □１ □T □４ □L □５ □T □２ □L… …□5 □T □8 □L □0 □T □4 □L Enter the keys in this order.

8 is a key decoder that reads the above key input, and the tone length code and pitch code are stored in the tone length RAM.
(Readable/writable memory) 10 and pitch RAM 1
It is designed to be recorded in 1.

Reference numeral 9 denotes an address generation circuit, which is configured to sequentially change the addresses of the tone length and pitch RAMs 10 and 11 by a pulse generated from the key decoder 8 every time the tone length code key □L is input.

12 is a changeover switch for setting whether to record musical note data during recording or playback of a music signal; turning on terminal a will turn on recording, and turning terminal b on will turn on playback. At times, music note data must be recorded.

Reference numeral 13 denotes a note length detection circuit which detects the lengths of notes and rests in the music signal and generates a clock corresponding to the length.

The details are low pass filter (LPF) 13a
The low-frequency part of the music signal is depicted using the 3D 3D to obtain the rhythm part, and in conjunction with this, a phase-locked loop (PLL)
13b to generate a clock.

14 is a counter for counting the above clock;
Reference numeral 15 denotes a coincidence circuit which outputs a coincidence pulse and resets the counter 14 when the count value of the counter 14 and the output of the note length RAM 10 match.

The coincidence pulse output from the coincidence circuit 15 is also supplied to the address generation circuit 9, and the address generation circuit 9 outputs both the RAM 1 and the RAM 1 every time it receives a coincidence pulse.
Addresses 0 and 11 are changed sequentially.

16 is an encoding processing circuit, and when the above matching pulse is obtained, each RAM 1 for the note length and pitch is
After taking in note length and interval codes from 0 and 11, adding and modulating synchronization signals or error detection and correction codes, etc., the musical note data is recorded on the magnetic tape T from the musical note data recording head 18 via the recording circuit 17. It's on.

Reference numeral 19 designates a musical note data reproduction head, and the musical note data reproduced from this is amplified and shaped into a waveform by a waveform shaping circuit 20, and a decoding processing circuit 21 detects a synchronization signal and detects an error in the musical note data. The image is corrected and then displayed on a screen 23 of a television or the like via a display circuit 22.

<Operations of the present invention> The present invention is constructed as described above, and its functions will be explained next.

First, when the user inputs the musical notes of the music to be played using the keyboard 7, the key decoder 8 and the address generation circuit 9 are activated, and each note length and interval code are input to the corresponding predetermined values in the RAMs 10 and 11, respectively. stored in the address.

After key-inputting the musical note data and storing it, the user can record the musical note data while recording the music signal from another source by operating the changeover switch 12, or write the musical note data on the magnetic tape T. Set whether to record while playing.

Then, a switch circuit (not shown) is operated to set the tape recorder to recording or reproduction mode.

Now, when the tape recorder is set to recording mode and the selector switch 12 is turned on to terminal a, the music signal introduced from the input terminal 1 is transferred from the music signal recording head 3 via the recording circuit 2 to the track on the magnetic tape T.
While being recorded in Tb, it is also supplied to the tone length detection circuit 13 via the changeover switch 12.

Also, when the tape recorder is set to playback mode and the selector switch 12 is turned on to terminal b, the magnetic tape T
The music signal reproduced by the music signal reproduction head 4 is processed by the reproduction circuit 5 and then supplied to the speaker drive circuit etc. from the output terminal 6, while being supplied to the note length detection circuit 13 via the changeover switch 12. be done.

When the music signal is thus supplied to the note length detection circuit 13, the note length detection circuit 13 outputs a clock synchronized with the music signal.

Then, this clock is counted by the counter 14, and the count value is used by the matching circuit 15 for tone length.
It is determined whether or not it matches the note length code of the note at the first address recorded in the RAM 10, and if they match, a matching pulse is output from the matching circuit 15.

Based on this coincidence pulse, the counter 14 is reset and starts counting the next clock, while the address generation circuit 9 is reset for the note length and pitch.
Change the addresses of RAM10 and 11 sequentially, and
The encoding processing circuit 16 reads the tone length and pitch codes when they match from both RAMs 10 and 11, adds a synchronization signal, error detection and correction code to them, modulates them, and sends them to the recording circuit 17. Supplied as music note data.

Then, the recording circuit 17 sends the musical note data to the musical note data recording head 18 and records it on the track Ta of the magnetic tape T.

As described above, the tone length and pitch RAM1
The musical note data stored in 0 and 11 are sequentially read out in synchronization with the music signal and recorded on the track Ta of the magnetic tape T, regardless of whether the tape recorder is in recording or reproduction mode.

Next, when the magnetic tape T on which musical note data is recorded is reproduced, the music signal is reproduced by the music signal reproduction head 4, supplied from the reproduction circuit 5 to the speaker drive circuit, and then emitted from the speaker. or,
On the other hand, the musical note data is reproduced by the musical note data reproducing head 19, and then amplified and waveform shaped by the waveform shaping circuit 20. Furthermore, the decoding processing circuit 21 detects the synchronization signal and corrects errors in the musical note data. is detected and corrected and supplied to the display circuit 22, where it is displayed on the screen 23 in synchronization with the music signal.

<Effects of the Present Invention> Since the present invention is configured as described above, it is an excellent invention that can completely synchronize the display of display data such as music note data with the performance of music.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the recording format of a magnetic tape applied to the present invention, FIG. 2 is a block electrical circuit diagram showing an embodiment of the data synchronous recording/reproducing apparatus of the present invention, and FIGS. 3 and 4 FIG. 5 is a diagram showing an example of operation keys used for key-inputting note length and pitch using the keyboard in the device of the present invention, and FIG. 5 is a diagram showing musical notes provided for explanation of the present invention. 3 and 18: music signal and musical note data recording head, 7: keyboard, 10 and 11: RAM for tone length and interval, 13: tone length detection circuit, 14: counter, 16: encoding processing circuit.

Claims (1)

[Claims] 1. A readable and writable storage means that can sequentially store display data at predetermined addresses, a display data input means for storing display data in the storage means, and a clock that outputs a clock corresponding to the note length of a musical signal, etc. a tone length detection circuit; a counter that counts clocks obtained from the tone length detection circuit; a coincidence circuit that compares data between the counter and the storage means and outputs a coincidence pulse when the two match; processing circuit means for reading the display data stored in the storage means by receiving a pulse; and an address generation circuit for sequentially changing the address of the display data stored in the storage means by receiving the coincidence pulse. a first recording head for recording the display data read by the processing circuit means on a magnetic tape; and a second recording head for recording the music signal on the magnetic tape; A data synchronization recording/reproducing device characterized in that it can be reset by