JPH05189709A - Method for recording selected audio signal on video magnetic tape - Google Patents

Abstract

PURPOSE: To simply cope with user's various requests by recording the singing voice of a singer, indicating popular music and a composite audio signal, including accompanying music on a first sound band and recording an audio signal, indicating the accompanying music on a second sound band. CONSTITUTION: The audio signal is recorded by using a magnetic tape with a sound track 21 including first and second sound bands 24 and 25. At this time, the composite audio signal including the singer's voice and accompanying music indicating popular music is recorded on the first sound band 24, and the audio signal indicating the accompanying music is recorded on the second sound band 25. Then the composite audio signals recorded on both sound bands 24 and 25, a signal desired by a user, is easily and selectively reproduced by switching a sound band selecting switch provided for a video cassette recorder.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to a method for recording selected audio signals on video magnetic tape.

[0002]

BACKGROUND OF THE INVENTION Since the introduction of video cassette recorders (VCRs), VCs have been established.
Due to the rapid development of VCR technology and its software, R is recognized by many consumers as a home entertainment system. Video software generally refers to pre-recorded video tape cassettes used in audiovisual devices, including VCRs.

Recently, in Japan, so-called "Karaoke"
Is very popular, and such a karaoke sings with the voice of the popular singer and / or the voice of the popular singer, not with the voice of the popular singer, but with the voice of the popular singer, accompanied by the orchestra. As a matter of fact, it can have the effect of singing on the stage under a complete orchestra type accompaniment. Such music video cassettes can be produced in their studios by video software producers.

A music video tape cassette containing music and pictures has a prerecorded magnetic tape wound therein. Such magnetic tapes include soundtracks, video tracks and control tracks when recorded in the Video Home System (VHS) format. In a music video cassette including a popular pop song, a composite audio signal in which a voice signal indicating a singer's voice and a music signal indicating accompaniment music are combined is recorded on a sound track.

Particularly, for a music video including popular songs, a user who wants to karaoke is required not only to simply listen to music but also to directly enjoy the song in accordance with the music signal indicating the accompaniment music. Has been done. However, it is difficult for the music video cassette having the audio track recorded as described above to reproduce only the music signal and the video signal indicating the accompaniment music according to the user's request.

Other types of software, such as laser discs (LDs), have been further proposed and used to meet the demands of such users.
There is a problem that a user has to newly purchase or keep an expensive device for reproducing such software, that is, a laser disc reproducing device.

Accordingly, it is an object of the present invention to provide conventional VCs.
An object of the present invention is to provide an audio signal recording method capable of easily and selectively reproducing only a music signal indicating an accompaniment music in R, for example, an accompaniment music signal.

[0008]

According to one embodiment of the present invention, an audio signal containing pop music and accompaniment music is placed on a magnetic tape having a soundtrack including first and second sound bands. An improved method for recording records a composite audio signal comprising on the first soundtrack a voice of a singer indicating the pop music and an accompaniment music, while recording the accompaniment music on the second soundtrack. Record the audio signal shown.

[0009]

According to the present invention, the composite audio signal recorded on the first sound band and the audio signal recorded on the second sound band are added by a sound band selection switch included in a normal VCR. It can be easily and selectively regenerated without requiring circuitry and equipment.

[0010]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a conventional standard video tape cassette recorder (V) with a fixed audio / control head.
FIG. 3 is a schematic diagram of a CR), which has a slanted cylinder 11, an erase head 15, an audio head 13, a control head 14, guide pins 20A and 20B, and a capstan 19. For example, the slanted cylinder 11 is a pair of video heads 1 provided on the cylinder.
2, the audio head 13 includes a first audio head and a second audio head attached to the upper end of the support 9. The VCR also includes a video signal recording / reproducing circuit 16, an audio signal recording / reproducing circuit 18, and a control signal generating circuit 17. In a VCR for a studio for producing video software, the audio signal recording / reproducing circuit 18 is for combining and separating various audio signals input from various audio sources, for example, many microphones provided in the studio. Mixer circuit (not shown).

A cassette having the magnetic tape 10 is a VCR.
When the tape is loaded onto the cylinder 10, the loading motor (not shown) causes the guide pins 20A and 20B to move the tape 10 to the cylinder 11 (broken line) and the audio head 1.
3 and control head 14. Each of the video heads 12 is rotated by the movement of the tape 10.
Contacts a single line of video information across the tape slightly diagonally moving in a helical scan type. The audio head 13 contacts a narrow soundtrack 21 along one end of the tape 10.

During recording, video and audio signals from video and audio sources, such as cameras and microphones, pass through the video signal recording / reproducing circuit 16 and audio signal recording / reproducing circuit 18, respectively. Are supplied to the video head 12 and the audio head 13.

During reproduction, the video signal on the video track is detected by the rotary head 12 and converted into the original video signal of the video source by the video signal recording / reproducing circuit 16. Similarly, the audio signal on the audio track is detected by the fixed head 13 and converted into the original audio signal by the audio signal recording / reproducing circuit 18. The control signal generating circuit 17 and the control head 14 are well known and will not be described for simplicity.

The tape 10 is used for recording and reproducing as shown in FIG.
The head travels in the direction from left to right and is recorded by the heads 12, 13 and 14. First,
A tape pattern of a video tape cassette recorded by the standard method is shown in FIG. 2, but the tape 10 has a soundtrack 2 recorded by heads 13 and 12, respectively.
1 and video track 22. The soundtrack 21 includes a first soundband 24 and a second soundband 25, which are formed by one end of the tape 10.
The video track 22 includes a number of video information lines formed at a predetermined angle with respect to the running direction of the tape 10. There is also a track 23 on the other side of the tape 10, which is a control track, which specifies the program starting point and controls the ac used to drive the capstan 19 during playback. Or used to synchronize.

According to one embodiment of the present invention, the composite audio signal forming the popular song is supplied to the audio signal recording / reproducing circuit 18, and the audio signal recording / reproducing circuit 18 supplies a high frequency ac bias current to the first audio head. Supply to. As a result, the composite audio signal is recorded in the first sound band 24. on the other hand,
The audio signal indicating the accompaniment music from the audio signal source is supplied to the second audio head through the audio signal recording / reproducing circuit 18 and is recorded in the second sound band 25 as described above. A video signal showing an image corresponding to popular songs is frequency-modulated and recorded on the video track 22 by a helical scan method. In this case, the carrier is directly recorded instead of ac bias.

As described above, at the time of recording, the magnetic tape is the capstan 19 and the take-up reel (take-up).
erasing head 15, video head 12, audio head 13 by a drive motor (not shown).
And across the control head 14 in the direction from left to right in FIG. The magnetic coating surface sequentially contacts the head. That is, first, the erasing head 1
5, video head 1 on the next slanted cylinder 11
2 and finally contact the audio head 13 and the control head 14. The erasing head 15 demagnetizes the tape before recording by exposing magnetic particles on the coated surface to a high frequency magnetic field. in this case,
The magnetic field is greater than the maximum magnetization characteristic of the particles.

As the tape passes the erasing head 15, the erasing magnetic field gradually decreases to zero. Therefore, in the demagnetized state, the coating surface has particles oriented in irregular directions. Next, the tape is the recording head 12, 1.
3 and 14 are in contact with each other, and at this time, they pass through the gap of the recording head, respectively, and at this gap, the head 1
The magnetic fields from 2, 13, and 14 cause the magnetic particles to be aligned along the field lines from heads 12, 13, and 14. Many magnetic particles are aligned according to the size of the magnetic field so that the recording area of each head remains on the tape,
This determines the amplitude and direction of the magnetically recorded signal.

When the cassette containing the pre-recorded tape is placed in a normal household VCR and the sound band selection switch on the VCR is operated manually or by a computer, the capstan 19 forces the tape. Is added to move the tape, and the reproducing head 14,
13 and 12, the video signal and the audio signal indicating the accompaniment music are reproduced. This is obtained by reproducing only the audio signal detected from the second audio head by the audio signal recording / reproducing circuit 18. Therefore, it is possible to easily reproduce the accompaniment music of the song and the related video by the normal home VCR.

FIG. 3 shows a magnetic layer of a magnetic tape used for high fidelity recording. The tape is a base film 34.
It includes the coding 33 arranged above. The magnetic coating 33 has two coatings, namely,
The recording medium further includes a first recording layer 32 and a second recording layer 31 arranged on the first recording layer 32.

In another embodiment of the present invention, an audio signal indicating a song is recorded on the first recording layer 32,
A video signal showing an image corresponding to a song is recorded on the second recording layer 31. As is known in the art, this is achieved by a pair of audio heads mounted on an angled cylinder (11 in FIG. 1).

FIG. 4 shows a part of a magnetic tape having a high fidelity recording pattern recorded according to another embodiment of the present invention, in which the magnetic tape 10 is formed on the first recording layer 32 by the high image quality recording method. Soundtrack recorded in 39
And the video track 3 recorded on the second recording layer 31.
Have eight. The audio track 39 includes a first discrete sound band 35 and a second discrete sound band 36, each band 35 and 36 being formed in parallel with a video information line 37, the video information line 37 being at a predetermined angle to the tape running direction. Is formed by.

In the high fidelity recording system, an audio signal is recorded on a magnetic tape in a helical scanning type by a pair of audio heads provided in an inclined cylinder (11 in FIG. 1). In this case, by using a rotary head that scans across the tape, a high relative speed of the magnetic audio head to the tape is obtained, so that the frequency of the audio signal is modulated by a carrier of high frequency (MHz) as in the video signal recording system. You can record / play back.

As described above, even in the high fidelity recording system, the composite audio signal indicating a song is recorded in the first discrete sound band 35 by each audio head, and the audio signal indicating the accompaniment music of the song is recorded in the first discrete sound band 35. Two discrete sound bands 36 can be recorded.
Therefore, the cassette with the pre-recorded tape is placed in a high fidelity home VCR,
When the audio band selection switch provided in the above is operated manually or by a computer, the original video signal and the audio signal indicating only the accompaniment music can be easily reproduced.

[0025]

Therefore, the music video software manufactured by the method of the present invention has an excellent effect that it can easily meet various demands of users without changing the existing video recording and reproducing apparatus.

[Brief description of drawings]

1 is a schematic diagram showing the basic elements of a standard type VCR with a fixed audio / control head.

FIG. 2 is a diagram showing a part of a magnetic tape having a recording pattern recorded according to the present invention.

FIG. 3 is a diagram schematically showing a part of a magnetic tape used for a high fidelity recording system.

FIG. 4 is a diagram showing a part of a magnetic tape having a high fidelity recording pattern recorded according to another embodiment of the present invention.

[Explanation of symbols]

12 ... video head, 13 ... audio head, 14 ...
Control head, 15 ... Erase head, 16 ... Video signal recording / reproducing circuit, 17 ... Control signal generating circuit, 18 ... Audio signal recording / reproducing circuit, 19 ... Capstan, 20A,
20B ... guide pin, 21 ... soundtrack, 22 ...
Video track, 23 ... Control track, 24 ... First sound band, 25 ... Second sound band.

Claims (10)

[Claims] 1. A method for recording an audio signal containing singing voice of a popular music singer and accompaniment music on a magnetic tape having a soundtrack including first and second sound bands, wherein the first sound band comprises: A method of recording a composite audio signal including singing voice of a singer indicating popular music and accompaniment music, and recording an audio signal indicating the accompaniment music on the second sound band. 2. The method according to claim 1, wherein the magnetic tape further includes a video track, and a video signal corresponding to the popular music is recorded on the video track. 3. The method of claim 2, wherein the soundtrack is formed along one edge of the magnetic tape. 4. The magnetic tape comprises a first magnetic recording layer,
A second magnetic recording layer formed on the first magnetic recording layer, wherein the video track is formed on the second magnetic recording layer at an angle to the running direction of the magnetic tape at a predetermined angle. 3. The method of claim 2, wherein the soundtrack is formed on the first magnetic recording layer in parallel with the video track. 5. The sound track includes first and second discrete sound bands, and an audio signal indicating the accompaniment music is recorded in the second discrete sound band. the method of. 6. A prerecorded video tape cassette for use in an audiovisual device, comprising a magnetic tape therein, wherein the magnetic tape comprises an audio track having first and second audio bands, In the first audio band, a composite audio signal including the voice of the singer indicating the popular music and the accompaniment music is recorded, and in the second audio band, the audio signal indicating the accompaniment music is recorded. Videotape cassette. 7. The video tape cassette according to claim 6, wherein the magnetic tape further includes a video track, and a video signal corresponding to the popular music is recorded on the video track. 8. The video tape cassette according to claim 7, wherein the sound track is formed along one end of the magnetic tape. 9. The magnetic tape comprises a first magnetic recording layer,
A second magnetic recording layer formed on the first magnetic recording layer, wherein the video track is formed on the second magnetic recording layer at an angle to the tape running direction at a predetermined angle. The video tape cassette according to claim 7, wherein a sound track is formed on the first magnetic recording layer in parallel with the video track. 10. The sound track includes first and second discrete sound bands, and an audio signal indicating the accompaniment music is recorded in the second discrete sound band. Video tape cassette.