JPS6256597B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sound processing control device, and particularly to a sound processing control device that is necessary when mixing sound effects, etc. with recorded audio using time codes recorded on video tape recorders and multi-channel tape recorders. The present invention relates to a sound processing control device that outputs only channels.

Conventionally, in order to record video signals and audio signals such as dialogue on a magnetic medium using a video tape recorder, the video signal 2 is recorded diagonally or perpendicularly to the longitudinal direction of the magnetic medium 1, as shown in FIG. At the same time,
Audio such as dialogue (two tracks in the case of stereo etc.) is recorded on the audio track 3, a control signal is recorded on the control track 5, and a time code such as SMPTE is recorded on the time code track 4. The information on these recording tracks is reproduced by a rotating head, such as a 2-head or 4-head, and a fixed head.

Furthermore, in addition to the video tape recorder, the magnetic medium 6 for recording audio signals by a multi-channel tape recorder or the like has a first track 7a and a second track 7, as shown in FIG.
b, . . . n-th tracks 7n are arranged in parallel in the width direction of the magnetic medium 6. Actually, audio information is recorded on the tracks from the first track to the 23rd track, and the SMPTE track 7n is recorded on the 24th track 7n. Record the time code, etc.

SMPTE (SOCIETY OF MOTION) mentioned above
PICTURE AND TELEVISION ENGINEERS)
As shown in Figure 3, one frame of the time code is 80 bits, the bit frequency is 2.4 kHz, and can represent up to a maximum time of 99 hours, 59 minutes, 59 seconds, and 29 frames. Of these, 64 bits are the time code and user bit 9, and 16 bits are the sync word 10. Of the time code mentioned above, 32 bits are used as empty bits for the user, and 32 bits are used as a time code, each of which has 4 bits to indicate what hour, minute, and second frame it is in. The data is divided into 4 bits, and 4 bits are inserted between each bit. The 16-bit sync word 10 makes it possible to identify whether the magnetic medium is running in the forward direction or in the reverse direction, and the code signal is such that the information of "1" and "0" is inverted phase. It is made up of a bi-phase signal expressed by the difference.

Synchronization can be achieved using the time code recorded on the magnetic medium of the video tape recorder as described above and the time code recorded on the magnetic medium of the multi-channel tape recorder. Erase the audio recorded on the audio track 3 of the magnetic medium of the video tape recorder, track down (mix) the track signals of each channel of the multi-channel tape recorder, and record the audio signals such as dialogue sound effects, etc. I can do it. Such sound processing editing is normally performed as follows. That is, audio signals such as dialogues are recorded on the audio track 3 of the magnetic medium 1 (see Fig. 1) of a 2-inch video tape recorder, and video signals are recorded as video signals. The time code is recorded on track 2, and the above-mentioned time code is further recorded on time code track 4. Hereinafter, this will be referred to as the basic magnetic medium. If sound effects and the like are inserted into the recorded material in this way, a magnetic medium that can be aired can be obtained based on this.

The basic magnetic medium described above is played back by, for example, a 4-head 2-inch video tape recorder (master video tape recorder) not shown, and the playback output is supplied to the multichannel tape recorder 12 of the sound effect editing device 14 shown in the fourth drawing. Here, the audio signal on the basic magnetic medium and the time code (the time code on the basic magnetic medium or the time code from a time code oscillator etc. may be used as necessary) are input to the first track of the audio track as shown in FIG. 7a and the nth track 7n. Furthermore, the magnetic medium in the video tape recorder 13 of the sound effect editing device 14 to which the output of the above-mentioned master video tape recorder is supplied contains the video signal of the basic magnetic medium and a time code (a time code from a time code oscillator or the like may be used). ) are recorded in the same way as in Figure 1. Further, the sound effects that have been appropriately processed in the sound effect editing device 14 are recorded on the second to twenty-third tracks 7b to _7o-1 of the magnetic medium 6 of the multichannel tape recorder 12. The audio signal into which the sound effects have been inserted from the output terminal (not shown) of the sound effect editing device 14 is copied back to the basic magnetic medium 1 of the master video tape recorder. That is, in the sound effect editing device 14, as shown in FIG.
The recorded tracks 7b to _{7o-1 are} reproduced, and the reproduced signals are mixed and dubbed onto the audio track 3 of the basic magnetic medium 1 shown in FIG. Of course, at this time, the original audio signal recorded on the basic magnetic medium 1 is erased. Furthermore, even if the video tape recorder 13 described above is used as a master video tape recorder and the reel on which the basic magnetic medium 1 is recorded is directly attached to the video tape recorder 13 as shown in FIG. is the same as In this case, the video tape recorder 13
Since the video signal, time code, and audio signal are recorded on the tape, the multichannel tape recorder 12 and the video tape recorder 13 record the video signal, time code, and audio signal.
From there, audio information is dubbed onto the first track 7a, and a time code is dubbed onto the n-th track 7n.

As mentioned above, a plurality of tracks 7a recorded on the magnetic medium 6 of the multi-channel tape recorder 12
~7 The audio information including the lines and sound effects _{of o-1} is transferred to one or two audio tracks (in the case of stereo) of the master magnetic medium 1 described above or of the video tape recorder 13 shown in the fourth figure. When copying back to 3, the S/N is greatly degraded because the audio information is minxed with sound effects for multiple tracks (portions without sound effects become noise) and down (dubbed). For example, if you copy back an audio signal recorded on two tracks with the same S/N but different phases, the S/N will degrade by about 3 dB, and with four tracks, the S/N will degrade by about 3 dB. It becomes 6dB. Therefore, in order to create the basic magnetic medium 1 in which audio information including sound effects with good S/N is recorded, sound effects 8a to 8 of the tracks 7a to 7n of the magnetic medium 6 shown in FIG.
If the level of the track that does not contain 8 _o-1 is reduced or cut off, the S/N can be increased by that amount. When the number of tracks and sound effects are small,
These can be controlled manually, but when the number of tracks reaches about 24 channels, it is not possible to stop the magnetic medium 6 midway, so an appropriate track is selected from among the multiple tracks by manual operation. It has the disadvantage that the output of the sound effect part cannot be attenuated or blocked.

The present invention aims to provide a sound processing control device that eliminates the above-mentioned drawbacks, and its feature is that sound effects, etc., which are copied back from the sound effect editing device 14, are stored on the basic magnetic medium 1. The purpose of this method is to automatically turn tracks in an audio signal into which no audio information such as sound effects is inserted into an "off" state using the SMPTE time code, thereby improving the S/N ratio.

The present invention will now be described in detail with reference to FIGS. 4 and 5. FIG. 4 shows a system diagram of the sound effect editing device 14 of the present invention, which is based on the basic magnetic medium 1 that is recorded according to the scenario by a master video tape recorder and on which audio such as dialogue is recorded. Video tape recorder 13 in sound effect editing device 14
Images and time codes are recorded on a magnetic medium as shown in FIG. 1, or a master tape of a master video tape recorder is set in the video tape recorder 13. Multichannel tape recorder 1
As shown in FIG. 2, the magnetic medium No. 2 has multiple tracks 7a to 7n arranged in parallel, and if it is monaural, it is placed on the first track, and if it is stereo, it is placed on the first and second tracks, and the audio such as dialogue is placed on the nth track. Dubbing timecode to the track. If a basic magnetic medium is set in the video tape recorder 13, the audio is dubbed from the video tape recorder 13 to, for example, the first track 7a of the multichannel tape recorder 12, and the time code is dubbed to the nth track.

The video signal and time code or audio signal dubbed to the video tape recorder 13 described above are passed through a code reader character generator included in the control circuit 16, and the SMPTE time code is used to monitor them together with the video. It is displayed on the cathode ray tube surface of the television receiver 15 in the form of hours, minutes, seconds, and frames. Control circuit 16
is controlled by a microcomputer, and includes a multi-channel tape recorder 12, first and second switch circuits 17, 18, and a plurality of sound effect reproduction tape recorders 19a, 19b, 19c.
It is done in such a way as to control. Sound effects 8a to 8o- ₁ recorded on each tape track of the sound effect reproduction tape recorders 19a, 19b, and 19c
However, as shown in FIG. 2, the lines are recorded on a track different from the track 7a on which the lines and the like of the multi-channel tape recorder 12 are recorded. For this reason, the adjustment console 20 used in a normal studio outputs the sound effects from the sound effect playback tape recorders 19a, 19b, 19c to the multichannel tape recorder 12 based on the command from the control circuit 16. It controls a second switch circuit 18 which selects which track of the track to record. Furthermore, the output of the multichannel tape recorder 12 is applied to the adjustment console 20 through a first switch circuit 17. The first switch circuit 17, of course, turns the switch group "on" and "off" based on commands from the control circuit 16.

Based on the sound processing control device 14 configured as described above, in order to record sound effects on the magnetic medium tracks 7b to _7o-1 , the scenario of the television receiver 15 from the video tape recorder 13 is changed based on the scenario. While looking at the image and time code, the user operates the adjustment console 20 based on the scenario and inputs the event number. In other words, the sound effects in a certain part of the scenario are on which track and at what time and minute, etc. These details include the time code at the time of inputting the event number, the device number of the tape recorder for playing the sound effects, the multichannel This includes inputting the track number of the tape recorder 12, the recording start point, the recording end point, etc. Through such input operations, the control circuit 16 stores the event number, selects the equipment number of the tape recorder for sound effect reproduction based on the data in the event memory, selects the track of the multichannel tape recorder 12, and selects the equipment number of the tape recorder for sound effect reproduction. Commands to start and stop the effect reproduction tape recorder, commands to synchronize the multi-channel tape recorder 12 and video tape recorder 13, and data exchange are performed through the bus line 21. Control circuit 16
Compares the time code stored in the event memory with the time code recorded on the sound effect playback tape recorder, and when the two match, starts the sound effect playback tape recorder and plays sound effect 8.
a, 8b... _8o-1 on tracks 7b...7o _-1 of the multichannel tape recorder 12,
Lines and sound effects are recorded on each track to provide complete audio information for the scenario. In this way, the audio information of multiple tracks including the lines and sound effects of each track 7a, 7b... _7o-1 recorded on the multi-channel tape recorder 12 is stored on the basic magnetic medium of the video tape recorder shown in FIG. 1 audio track 3. Of course, in this case, the original audio information recorded on the audio track of the basic magnetic medium 1 is erased. This tracked down video tape recorder 1
When mixing the information of multiple tracks of the multichannel tape recorder 12 with the sound (audio) track of the basic magnetic medium No. 3, in the present invention, as shown in FIG. Audio signals are always played. on the other hand,
Based on the time code recorded on the 24th channel, first the sound effect 8c of the 4th channel 7d is the time.
At _t1 , the switch circuit 17 is operated to input the playback output to the adjustment console 20. At this point, the second
and the third track is turned "off" so that no tape noise is played. Next, at time _t2 , the sound effect 8a of the second track 7b is turned on.
Although the third track 7c is in the "off" state, the third track 7c is in the "off" state. Next, at time _t3 , the sound effect 8c of the fourth track 7d becomes "off" so as to stop the reproduction output, and only the second track 7b becomes the output state. Furthermore, at time _t4 , the second track 7b is turned off, only the third track 7c is turned on, and the sound effect 8b is recorded on the soundtrack of the basic magnetic medium. At time t ₅ ,
The track 7c is in the "off" state, and from then on, only the information such as dialogue on the first track 7a is recorded.

In this way, in order to track down, the present invention stores the time of each track, equipment number, etc. in the storage circuit of the control circuit 16 based on a scenario in advance, so that the second switch circuit 1
8 can be easily controlled, so it can automatically extract only the signal for which sound effects should be dubbed from among multiple tracks and mix down the sound effects onto the audio signal of the audio track of the video tape recorder 13, etc. It is possible to
Therefore, the influence of other sound effect signals is blocked, and the cause of S/N deterioration during mixdown due to other signals can be removed, so that the S/N during mixdown can be improved.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the recording state of the magnetic medium of a video tape recorder used in the sound processing device of the present invention, and FIG. 2 is a plan view showing the recording state of the magnetic medium of a multi-channel tape recorder similar to FIG. 3 is a schematic diagram for explaining SMPTE, FIG. 4 is a more detailed system diagram of the present invention, and FIG. FIG. In the figure, 13 is a video tape recorder, 12
14 is a multi-channel tape recorder, 14 is a sound processing device, 15 is a television receiver, 16 is a control circuit, 17 and 18 are switch circuits, 19a, 19
b, 19c is a tape recorder for reproducing sound effects.

Claims (1)

[Scope of Claims] 1. A first medium on which a first audio signal and a time code signal are recorded, and on which a plurality of second audio signals are each intermittently recorded on a multitrack;
The second one where the video signal and time code signal are recorded.
A first audio signal and a plurality of audio signals reproduced from the first medium by a multi-channel tape recorder using a time code signal recorded on the first and second media. A sound processing control device for recording a mixed signal of a second audio signal on an audio track of the second medium by a video tape recorder, wherein a plurality of second audio signals reproduced from the first medium are recorded. a switch circuit that turns each audio signal on and off; a control circuit that controls the multichannel tape recorder, the video tape recorder, and the switch circuit; and a storage circuit provided in the control circuit; On/off timing signals for each of the audio signals are stored in the storage circuit using time codes, and the control circuit turns on/off the switch circuit based on the timing signals read from the storage circuit. A sound processing control device characterized by automatically controlling.