JP2687600B2 - Sound reproduction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a sound reproducing device using an 8 mm VTR.

[Summary of the Invention]

The present invention relates to a sound reproducing device using an 8 mm VTR,
A plurality of audio signals are recorded by dividing them into tracks in a diagonal direction with respect to the longitudinal direction of the tape, the audio signals are reproduced from the tape by a rotary head, and the reproduced audio signals are simultaneously reproduced by individual speakers. In the sound reproducing device adapted to reproduce, by making the height of each individual speaker different in accordance with the height of the sound source at the time of recording the audio signal, a sound with a realistic sensation close to that at the time of recording is produced. Is to be played.

[Conventional technology]

It has been proposed to form a recording device dedicated to an audio signal by diverting a device having a standard defined by 8 mm VTR. This divides the video signal recording area of the 8 mm VTR into 5 parts, and the 1st to the 1st PCM data recording area on the diagonal track (221 °) on the tape is defined by the 8 mm VTR standard. It is divided into 6 segments of 6 and outputs PCM data for a time corresponding to the desired segment to record an PCM audio signal by two rotary heads which are spaced 180 ° apart from each other. In this case, since the audio signal cannot be recorded for each segment on the track, the applicant of the present invention has previously disclosed the Japanese Patent Laid-Open No. 61-
According to 289579, a plurality of, for example, 12 sound sources
We have proposed a recording device that can record (= 6 × 2) channel audio signals into PCM and record multiple tracks simultaneously.

Further, Japanese Patent Laid-Open Publication No. 62-180504 discloses a reproducing apparatus capable of simultaneously reproducing audio signals recorded on a tape by such a recording apparatus in parallel from a plurality of tracks without serially reproducing from each of the six segment areas. Applicant has proposed. In such simultaneous playback, a playback device for assigning and recording audio signals of one musical instrument such as an orchestra to one track and playing the audio signals of each musical instrument with 12 speakers is a "JAS Journal". May 1986, pp. 9-15, "12-channel PCM multi-track recorder using 8 mm VTR".

[Problems to be solved by the invention]

According to the above-mentioned JAS Journal, when reproducing the source of each musical instrument such as an orchestra recorded on a 6-channel 12-track, 12 speakers corresponding to each individual musical instrument are arranged side by side in a straight line. An example is shown in which multi-channel reproduction is attempted by supplying a source recorded in 12 channels to the speaker.

In this case, since the twelve speakers are simply arranged in a row, the sound reproduced from the twelve speakers has a drawback that is different from the sound in the actual playing state.

The present invention has been made in view of the above drawbacks, and an object of the present invention is to provide a sound reproducing device having a realistic sensation that is extremely close to an actual playing state.

[Means for solving the problem]

As shown in FIGS. 1 and 2, an example of the sound reproducing apparatus of the present invention is such that audio signals of a plurality of musical instruments, voices, etc. are recorded in a track () which is oblique to the longitudinal direction of the tape (1). 2) Area recording is performed on the tape, and the audio signals are reproduced from the tape (1) by the rotary heads (5) and (6), and the reproduced audio signals are respectively output to individual speakers (11P ₁ ) (11P ₂ ). (11B) (11SY) (11SN) (11H) (11
BS) (11D) (11S) (11G) (11V ₁ ) (11V ₂ ) In the sound reproducing device that is reproduced simultaneously, each individual speaker (11P ₁ ) (11P ₂ ) (11B) (11SY) ) (11SN)
(11H) (11BS) (11D) (11S) (11G) (11V ₁ ) (11
The height of V ₂ ) is made different according to the height of the sound source of the instrument or voice when recording the audio signal of the instrument or voice.

[Action]

According to the sound reproducing apparatus of the present invention, an oblique track for one field of 8 mm VTR is divided into 6 segments, audio signals of 12 musical instruments and the like are recorded, and reproduction outputs of these musical instruments and the like are divided into 12 segments. When the speakers are simultaneously emitted, the heights of these speakers are made different so as to match the height of the musical instrument at the time of recording, so that a reproduced sound field close to the realism at the time of recording can be obtained.

〔Example〕

Before describing the speaker array of the sound reproducing apparatus of the present invention, the structure of the reproducing apparatus for reproducing a 12-channel audio signal using the 8 mm VTR will be described with reference to FIGS. 2 to 4.

Figure 3 shows a rotating drum used in the standard of 8 mm VTR, and this rotating drum (4) is 180 ° from each other.
The rotary magnetic heads (5) and (6) of the first and second channels are attached at angular intervals of. Recording and reproduction are performed by the rotary magnetic heads (5) and (6). The magnetic tape (1) is wound and guided over a range of 221 degrees or more on the peripheral surface of the rotating drum (4). When recording / reproducing a normal 8 mm VTR video signal, the recording / reproducing of the video signal is performed in the section of 180 degrees out of 221 degrees, and in the remaining section of 36 degrees.
Recording and reproduction of audio signals that have been PCM and compressed in the time domain are performed. The track pattern on the magnetic tape (1) recorded by such rotary heads (5) and (6) is recorded obliquely to the longitudinal direction of the magnetic tape (1) as shown in FIG. When 180 degrees of this video signal recording section is divided into 5 equal parts, the respective angles become 36 degrees. Therefore, if 36 degrees of the remaining PCM audio signal recording area is added, as shown in FIG. 2, the diagonal track (2) becomes The magnetic tape (1) is divided into first to sixth segments which divide the width direction into six equal parts. Normal 8
In order to reproduce an audio signal with a millimeter VTR, one track is selected and reproduced as a stereo like the oblique track (2a) shown on the left side of FIG. The rotation angle position is detected for the 6 segments, and PCM independent audio signals are recorded at the time corresponding to each segment of 36 degrees from the contact start end of the rotary magnetic head (5) (6), and at the time of reproduction. By gated that time and performing reproduction, for example, twelve PCM audio signals from twelve sound sources are output to the first to twelfth speakers (3a) to (3l) substantially simultaneously and emitted. You can FIG. 4 is a system diagram of a reproducing system for reproducing audio signals from 12 sound sources recorded on such an oblique track. First and second rotary magnetic heads (5)
The output from (6) is amplified in the reproduction amplifiers (7a) and (7b), respectively, and supplied to the signal separation circuit (8). In front of this signal separation circuit (8), there is provided a switch means for supplying a pulse from a pulse generator (not shown) related to the rotary head to the pulse signal generation circuit and controlling the pulse signal generation circuit. The output of the playback amplifier (7a) is the first
Is the audio signal PCM ₁ recorded on the track TRK ₁ of the output audio signal PCM ₂ ～PCM ₆ recorded in the second to sixth track TRK ₂ ～TRK ₆ is output to the output of the playback amplifier (7b) And is input to the signal separation circuit (8). The signal separating circuit (8) is controlled by a gate pulse from a gate generating circuit (not shown), and the six first magnetic tapes (1) of the magnetic tape (1) are controlled.
To sixth track TRK ₁ ~TRK ₆ 2 channels recorded in the (left and right channels) of audio signals PCM ₁ ~PCM ₆ (i.e., 12 channels of up to PCM ₁ ~PCM ₁₂ in mono) is obtained. That is, the first and second rotary magnetic heads (5)
In (6), the audio signal PCM ₁ of the first segment on the oblique track read from the first track TRK ₁ is intermittently obtained in the time axis direction. Similarly, the _{second to sixth} tracks on the diagonal tracks read from the _{second to} sixth tracks TRK2 to TRK6
The sixth segment audio signal PCM ₂ ~PCM ₆ of is intermittently obtained that in the time axis direction. The audio signals PCM _{1 to} PCM ₆ obtained from the signal separation circuit (8) are supplied to the reproduction processing circuits (9a) to (9f) for reproduction processing. The reproduction processing circuits (9a) to (9f) perform waveform shaping, time axis expansion, and bit conversion, and then separate the audio signals into left and right audio signals. In this example, the PCM audio signal is separated into two types of audio signals, for example, if there are 12 types of musical instruments having different sound sources. The two separated audio signals are respectively D / A converted, output amplified through the LPF and noise removal circuit, and the audio signals of 1 to 12 channels are connected to the output of each playback processing circuit (9a) to (9f). It is supplied to the twelve speakers (3a) to (3l) shown in FIG.

In this example, the height of the opening of the speaker cabinet for accommodating these speakers (3a) to (3l) is determined as shown in FIG. That is, FIG. 5A shows, for example, a recorded audio signal when a piano (10) is played, for example, on a track TRK ₁ , and outputs a reproduction signal from the recording track TRK ₁ exclusively to a sound emission hole of a speaker cabinet. It is a perspective view for explaining the method of determining the height of the. First, adjust the height of the mid-treble speaker (11P) in height H _P of the sound source when to record the sound of the Viano (10). In this case, the opening (13P) of the mid-high range speaker (11P) put in the 3-way speaker cabinet (12P).
Equal to the floor the height of the sound source at the piano recorded in height H _P from the center position of P). Therefore, in this example, the speaker cabinet (12P) is placed on the table (14).

FIGS. 5B and 5C also explain how to determine the height of each speaker cabinet when reproducing an audio signal containing a musical sound when a sax (17) is played along with a drum (15) and a cymbal (16). It is a figure. When recording the performance sound of the drum (15) or the sax (17), the heights of the sound source H _D and H _S are, for example, the mid-high range speaker (11D) built in the 2-way speaker cabinet (12D) (12S). The heights H _D and H _S from the center of the openings (13D) and (13S) of (11S) to the floor should be aligned.

Also, for example, a speaker cabinet (12SN) in which a full-range speaker is housed in order to reproduce a cymbal (16).
Then, the opening (13SN) of this full-range speaker (11SN)
The height H _SN from the center position to the floor is selected to be equal to the height H _SN of the sound source when the sound of the cymbal (16) was recorded. Therefore, in this example, a stand (18) or the like is arranged at the lower end of the speaker cabinet to adjust the height H _SN . Of course,
A height adjusting means (19) for freely adjusting the height of the stand (18) as shown in FIG. 5C may be provided. In this case, the height adjusting means (19) is manually or vertically moved by a motor or the like. It can also be moved. Furthermore, the speaker cabinet (12S) is moved up and down along the stand (18), and the stand (18)
It is also possible to slidably dispose two or more speaker cabinets and slide two or more speaker cabinets to adjust the height of each speaker cabinet. Further, the tone-direction (trademark) type speaker in which a plurality of speakers are arranged in series in the vertical direction may be electrically sequentially switched to change the height direction.

In the clarinet (17), saxophone, or trumpet shown in FIG. 5C, the sound source moves left and right in order to play by moving the body left and right. For example, as shown in FIG. The speaker (12S) for reproducing (17) or the saxophone may be swung left and right as shown in FIGS. 6A and 6B. In FIG. 6A, the stand (18) is composed of a spring member so that the speaker can be swung back and forth and left and right by vibrating by hand.

As shown in FIG. 6B, a pivot (23) is provided at an upper position of the stand (18), and a sub arm (21) is rotatably pivotally attached to the pivot, and a speaker is provided at an upper end of the sub arm (21). Attach the cabinet (12S) and attach the weight (22) to the lower end.
By vibrating the speaker cabinet (12S) to the left and right, the speaker cabinet can be swung to the left and right like a pendulum by the weight (22).
In addition, it vibrates left and right by hanging the speaker cabinet from the ceiling etc. and swinging it left and right like a pendulum, rotating the speaker cabinet with a motor, etc., or electrically switching multiple speakers arranged in the horizontal direction. You may be made to obtain the sound that was made.

As described above, the speaker cabinet groups in which the speaker sound emitting position height is equal to the sound source height of the musical instrument to be played are arranged as shown in FIG. As shown in FIG. 1, for example, on the left side of the reproduction hall (25), speaker cabinets (12P ₁ ) (12P ₂ ) for reproducing the first and second pianos are arranged.
A speaker cabinet (12B) for bass reproduction is arranged at the left back of the reproduction hall (25). In addition, the reproduction hall (2
In the back right of 5) is a speaker cabinet for snare playback (12SN) and a speaker cabinet for cymbal playback (12SN).
SY), speaker cabinet for high-hat playback (12
H) are installed, and speaker cabinets (12SY) (12PSN) (1 for snare, cymbal, and hi-hat playback are provided.
Speaker cabinets (12BS) (12D) for playing bass drum and kick drum are arranged in front of 2H). Furthermore,
A speaker cabinet (12S) (12G) for playing solo performances of saxophone, guitar, etc. is placed in front of the speaker cabinet for playing each of the above musical instruments, and two speaker cabinets for vocals (12V ₁ ) ( 12V ₂ ) is installed. By arranging the speaker cabinets three-dimensionally in the same manner as in the actual ensemble state, it is possible to obtain a sound reproducing apparatus in which audio signals such as musical instruments and voices emitted from these speakers are extremely realistic.

FIG. 7 shows another speaker arrangement according to the present invention. Similar to FIG. 1, the same height as that of the sound source at the time of recording and the height of the mid-high range speaker is selected in the same manner as the arrangement in the ensemble state. Performer display panels (27P) (27B) (27D) (27G) (27S) (27M) in front of and behind each speaker cabinet
Those who listen to the reproduced sound from these musical instruments with the arrangement of the 1st and 2nd piano speakers (12P ₁ ) (12P ₂ )
The sound emitted from the piano is the same as that of a piano. Similarly, each speaker cabinet of bass, bass drum, hi-hat, cymbal, guitar, sax, marimba, etc. (12
B), (12D), (12H), (12SY), (12G), (12
The musical sounds emitted from S) and (12M) are visually clarified to be these sounds, and a realistic sensation closer to the actual ensemble state is obtained.

In the above case, the performer display panel is cut out in the shape of the performer, but the same effect can be obtained by attaching the performer's photo panel or the like to the baffle portion of the speaker.

In FIGS. 1 and 7, a plurality of speaker cabinets are arranged in the reproduction hall to reproduce audio signals such as musical instruments and voices. However, an automatic performance piano and a plurality of speaker cabinets are arranged in the reproduction hall. and, the first to fifth track TRK ₁ ～TRK ₅ shown in FIG. 2 for example a guitar, saxophone, bass, kick drum, hi-hat, and recorded sound from the instrument, such as a snare, and reproduce it, these It is also possible to emit a sound through a speaker cabinet corresponding to the musical instrument and record a piano automatic performance control signal on the sixth track TRK ₆ , and pick up this control signal at the time of reproduction to automatically perform the automatic performance piano. The PCM audio signal recorded in each of the above segments is 8 mV
Obviously, it may be an audio signal from a satellite or a cable television, for example, not from a TR recording / reproducing device. In the above example, the piano automatic performance control signal is recorded in one of the six segments, but a binaural signal may be put in this one segment and used for headphone stereo or the like.

According to the present invention, audio signals such as musical instruments and voices of different sound sources are simultaneously recorded on each track of an 8 mm VTR PCM multi-track, and the audio signals reproduced at the same time are reproduced by different speakers and the height of the speakers or Since the arrangement positions were arranged at the front and the rear at the height at the time of recording and at the same position as the ensemble recording state, a more realistic sound reproducing device was obtained.

The present invention is not limited to the above embodiments,
Obviously, various modifications can be made without departing from the scope of the present invention.

〔The invention's effect〕

According to the present invention, it is possible to obtain a sound reproducing device having a realistic sensation that is very close to the actual playing state.

[Brief description of the drawings]

FIG. 1 is a speaker array diagram showing an embodiment of a sound reproducing apparatus of the present invention, FIG. 2 is a track pattern diagram on a tape, FIG. 3 is a schematic diagram showing a rotary drum for guiding the tape, and FIG.
FIG. 5 is a system diagram of a reproduction system, FIG. 5 is an explanatory view showing a method of determining the height of a speaker, FIG. 6 is an explanatory view showing a method of swinging the speaker left and right, and FIG. 7 is an audio reproduction device of the present invention. It is an array diagram showing another example of. (1) is magnetic tape, (2) is diagonal track, (3a) ~
(3l) is a speaker, (5) and (6) are first and second rotary magnetic heads, (11B) (11P ₁ ) (11P ₂ ) (11S) (11BS)
(11D) (11SY) (11SN) (11H) (11G) (11V ₁ ) (11V
₂ ) is mid-high range speaker and full range speaker, (14)
Is a stand and (18) is a stand.

Claims (1)

(57) [Claims] 1. An audio signal of a plurality of musical instruments, voices, etc. is recorded by dividing the tape into areas in a diagonal direction with respect to the longitudinal direction of the tape, and the audio signal is reproduced from the tape by a rotary head. In a sound reproducing device in which each audio signal is simultaneously reproduced by each individual speaker, the height of each individual speaker is set to the above-mentioned musical instrument or voice of the musical instrument or voice at the time of recording the audio signal of the musical instrument or voice. A sound reproduction device characterized in that they are made different according to the height of the sound source.