JPH09185369A - Digital information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record a musical sound or auxiliary digital information regarding the musical performance of a musical instrument in an auxiliary recording area on a recording medium. SOLUTION: This recording medium TP is so constituted that a PCM signal generated by digitizing a musical sound signal is recorded in the main information recording area M of the recording medium TP and auxiliary digital information on MIDI code, etc., regarding musical instrument control or timbre control related to the said musical sound is recorded in an auxiliary information recording area S formed at a specific interval with the main information recording area M. This recording medium TP is mounted, and the said PCM signal and auxiliary digital information on the MIDI code, etc., are reproduced from the single track T of the same recording medium TP and supplied to specific corresponding sound source generators, which can be controlled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital information recording medium, and particularly to a musical sound in an auxiliary recording area of the recording medium.
Alternatively, the auxiliary digital information relating to the performance of the musical instrument is recorded and reproduced.

[0002]

2. Description of the Related Art Conventionally, magnetic recording of various kinds of information on a recording medium such as a magnetic tape has been widely performed. In recent years, in order to record more information in high quality, information is digitized and recorded.

[0003]

By the way, conventionally, for example, in the case of recording information about only a performance and other information obtained by adding vocals to this performance on one recording medium, each of these information is recorded. It was recorded separately. However, in such a case, there is a problem that it is not efficient in terms of recording a large amount of information on one recording medium because the performance part of each information is common.

[0004]

The present invention has been made in view of the above-mentioned circumstances, and digital information recording and recording capable of efficiently recording more information on one recording medium. The purpose is to provide a reproduction method. In order to achieve this object, the present invention has, as shown in FIG. 1, a main information recording area in which main information is digitally recorded and an auxiliary information recording area in which auxiliary information of the main information is digitally recorded. A digital information recording medium formed independently of each other at intervals, in which a PCM signal obtained by digitizing a musical tone signal is recorded in the main information recording area, and a musical instrument control related to the musical tone is recorded in the auxiliary information recording area. Alternatively, auxiliary digital information such as MIDI code relating to tone color control is recorded.

When the digital information recording medium as described above is reproduced, only the information recorded in the main information recording area M or the auxiliary information recording area S is reproduced, or in each of these areas M and S. By reproducing the generated information at the same time, it is possible to realize three types of performance forms. In addition, the information for realizing the three types of performance forms can be recorded in one recording medium, and an efficient recording medium can be realized.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. This embodiment shows a case where the present invention is carried out by a tape recorder provided with the magnetic heads 1 and 2 of the helical scan system. In this embodiment, the MIDI (Musical Instrument) is used.
nt Digital Interface) code is recorded.

The MIDI code is used for selecting a predetermined sound source generator and causing the selected sound source generator to play, and is necessary for information and performance for selecting the predetermined sound source generator. It includes musical instrument control information indicating a pitch, a scale, a note length, and the like.

As shown in FIG. 2, the tape recorder is composed of a rotary drum 3 to which the magnetic heads 1 and 2 are attached, a signal recording system 4 and a signal reproducing system 5. The signal recording system 4 includes amplifiers 6, 7,
It is composed of an A / D (Analog Digital) converter 8, an encoder 9, and a modulation circuit 10, and is a PCM that digitizes a musical tone signal, which is the main information in this embodiment and is supplied through an input terminal 11. (Pulse C
mode modulation signal and other input terminal 12 to modulate the MIDI code which is the auxiliary digital information in the present embodiment supplied to the encoder 9 from a microcomputer, a sequencer or the like,
The magnetic heads 1 and 2 are supplied to the magnetic heads 1 and 2.

On the other hand, the signal reproduction system 5 includes an amplifier 15,
16, 17, a demodulation circuit 18, a signal processing circuit 19, a performance device 20 including a plurality of sound source generators, a D / A converter 21, and a mixer 22. The MIDI signal is reproduced while the musical tone signal is reproduced. Plays a musical tone signal from the tone generator unit 20 that is selectively played by the chord and outputs the output terminal 2
Output from 3.

In the tape recorder as described above, the magnetic tape Tp which is the recording medium in this embodiment is used.
Is wound around the outer circumference of the rotary drum 3 at 90 degrees,
The magnetic tape Tp is run at a predetermined speed and the rotary drum 3 is rotated at a constant speed to record the information supplied from the signal recording system 4 on the magnetic tape Tp.

As a result, a plurality of unit tracks T inclined with respect to the longitudinal direction of the magnetic tape Tp are formed on the magnetic tape Tp, and the signal recording system is formed on each of the unit tracks T, as shown in FIG. At 4, the digitized information is recorded. Further, in each of the unit tracks T,
As shown in FIG. 1, a main information recording area M and an auxiliary information recording area S set to be smaller than this recording area are formed. In the main information recording area M, a modulated signal of the PCM signal is recorded and the auxiliary information is recorded. The modulated signal of the MIDI code is recorded in the recording area S.

In this embodiment, the main information recording area M is composed of 128 blocks, and each block has a synchronization signal area Sync, as shown in FIG.
Index signal area ID, block address area B
A, parity code area PC, PCM data area PCM
Consists of Then, a small amount of other S'can be formed in the index signal region ID,
The MIDI code may be recorded in this area. Further, a tracking signal, a PLL signal and the like are recorded in the hatched portion of FIG.

In this embodiment as described above, when a PCM signal of a song is recorded as the main information and a MIDI code for accompaniment of the song is recorded as an auxiliary signal, the mixer 22 of the signal reproducing system 5 is recorded. By selecting the reproduction output in, it is possible to realize three kinds of reproduction modes such as reproduction of only song, reproduction of song and accompaniment, and reproduction of only accompaniment.

In particular, when playing only the accompaniment, it can be used as so-called karaoke. In this case, since the MIDI code itself is a digital signal, it is excellent in terms of rhythm accuracy and sound quality. ing.

Further, by recording performance information only for the main melody as the MIDI code, for example, when performing fast forward FF or rewinding REW while the magnetic tape Tp is wound around the rotary drum 3, the main information recording area is recorded. The PCM signal recorded in M becomes fragmentary and is not reproduced as it was, but by reproducing the above MIDI code,
The main melody based on this MIDI code can be played.

Thus, when performing fast forward or rewind as described above, the approximate position of each song can be known by reproducing only the main melody. By the way, in each of the above-mentioned embodiments, the MIDI code is recorded as the auxiliary digital information. However, the present invention is not limited to this. It may be recorded in.

In particular, by recording auxiliary digital information relating to tone color control showing the same tone color as the tone color of the main information data recorded in the PCM data area, the tone color in the main information data can be immediately known. Can be done.

In the case of recording audio information such as the description of a song as described above, a data compression method such as differential PCM can be used to record an amount of information sufficient to recognize the content of words. I can.

MIDI is used as auxiliary digital information.
Although the case where the code is recorded has been described, the present invention is not limited to this, and the code for controlling the device that moves in association with the tone signal recorded in the main information recording area M is recorded in the auxiliary information recording area S. You may do it.

Further, the present embodiment is applied to a tape recorder provided with the magnetic heads 1 and 2 of the helical scan system, but if it is a medium capable of recording digital signals, for example,
Any material such as a tape medium by a tape recorder equipped with a multi-track type magnetic head, a semiconductor memory, a disk medium, or the like may be used.

[0021]

As is apparent from the above description, according to the digital information recording medium of the present invention, it is possible to reproduce the music recorded on one recording medium in three kinds of playing modes. Yes, this makes it possible to realize efficient recording.

When performing fast forward or rewind by playing the main melody based on the MIDI code,
It is also possible to know the approximate position of each song by playing only the main melody.

Since the auxiliary information recording area is set smaller, reproduction of accompaniment can be realized without lowering reproduction quality or recording density. In addition, since it is configured to be reproducible by a single reproducing element, it is very easy to achieve compatibility with existing standards.

When fast-forwarding or rewinding is performed by playing the main melody based on the MIDI code,
It is also possible to know the approximate position of each song by playing only the main melody.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a track pattern of a signal recorded on a digital information recording medium of the present invention.

FIG. 2 is a block circuit diagram of a tape recorder to which a medium according to an embodiment of the present invention is mounted.

FIG. 3 is a schematic diagram showing an example of a track pattern of the digital information recording medium of the present invention recorded by the tape recorder shown in FIG.

[Explanation of symbols]

 1, 2 Magnetic head 3 Rotating drum 4 Signal recording system 5 Signal reproducing system 6,7,15,16,17,18 Amplifier 8 A / D converter 9 Encoder 10 Modulation circuit 11,12 Input terminal 18 Demodulation circuit 19 Signal processing circuit 20 Performer (sound source generator) 21 D / A converter 22 Mixer 23 Output terminal M Main information recording area S, S'Auxiliary information recording area T Unit track TP Recording medium

Claims (2)

[Claims] 1. A main information recording area in which main information is digitally recorded and an auxiliary information recording area which is set smaller than the recording area and in which auxiliary information of the main information is digitally recorded are independent of each other at predetermined intervals. A digital information recording medium formed by a PCM in which a tone signal is digitized in the main information recording area.
A signal is recorded, and M for musical instrument control or tone color control related to the musical sound is recorded in the auxiliary information recording area.
A digital information recording medium, characterized in that auxiliary digital information such as an IDI code is recorded. 2. A main information recording area in which main information is digitally recorded and an auxiliary information recording area which is set smaller than the recording area and in which auxiliary information of the main information is digitally recorded are independent of each other at predetermined intervals. A digital information recording medium formed by a PCM in which a tone signal is digitized in the main information recording area.
A digital information recording medium characterized by recording a signal and recording auxiliary digital information such as a device control code relating to device control related to the musical sound in the auxiliary information recording area.