JPH03214487A - audio editing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an audio editing device for editing an audio signal in synchronization with video when editing a film such as a movie.

[Conventional technology J FIG. 7 is a block diagram showing a conventional audio editing device.

In the figure, 1 is a projector capable of projecting a film having a time code track on which a time code is recorded, and 2 is a projector that reads an audio signal recorded on, for example, a magnetic tape, corresponding to the image of the film to be projected. This is an audio table recorder that serves as an audio signal reading unit that further reads out the time code recorded together with this audio signal. 3 is a time code reader that reads the time code recorded on the time code track of the film, and 4 is a synchronizer that controls the synchronized operation of the audio tape recorder 2 based on the time code read by the time code reader 3. be. 5 is an editing section that controls the audio table recorder 2 and edits according to the signal from the synchronizer 4;
is an audio playback section that amplifies and plays back the audio signal read out by the audio tape recorder 2.

FIG. 3 is a block diagram showing a system for recording time codes on negative film at a shooting location. In the figure, 7 is a camera that has a function of recording time codes on the time code track of negative film, and 8 is a time code generator that generates the time code to be recorded on the time code track and supplies it to the camera 7. It is evening.

FIG. 4 is an explanatory diagram showing the recording state of a time code on a time code track of a negative film.

In the figure, 9 is the negative film that was photographed, and 10
is, for example, a time code track on this negative film 9 on which a time code is optically recorded. 11 shows an example of the time code recorded on this time code track 1O, and in this example, consecutive numbers such as "1" to "9" are assigned to each frame of the negative film 9.

FIG. 5 is a block diagram showing a system for recording a time code on a photographed negative film when printing on the photographic film. In the figure, 8 is a time code generator similar to that described above, and 9 is a negative film.

12 is a body film printing machine having a function of recording a time code track code of a body film to be printed, and 13 is a body film printed from a negative film 9 by this body film printing machine 12.

Figure 6 shows the time code on the edited film, the time code read out from the audio table recorder 2,
FIG. 2 is an explanatory diagram showing the mutual relationship between consecutive serial numbers from the start point of the time code, and FIG. Figure (b) shows the time code recorded on the magnetic tape read out by the audio tape recorder 2, and Figure (c) shows the consecutive serial numbers from the start of the time code.

Next, the operation will be explained. When photographing is started in the system of FIG. 3, the time code generator 8 sequentially generates a continuous numerical time code and supplies it to the camera 7. The camera 7 records the image on the negative film 9, and optically records the time code from the time code generator 8 sequentially on the time code track 10 of the negative film 9 corresponding to the image. The time code track 10 of the negative film 9 has a time code 11 with consecutive numbers as shown in FIG.
is recorded. Here, recording of this time code is based on the time code supplied from the time code generator 8 in the positive film printing machine l2 when printing the positive film l3 from the negative film 9 in the system shown in FIG. It may also be done by

Editing work is performed using the positive film 13 printed from the negative film 9 photographed in this manner.

In editing work, the body film l3 printed in this way is projected, and unnecessary portions are deleted, the order of the film is changed, etc. as necessary. When such editing work is completed, the time codes recorded on the time code track of the film become discontinuous and in no particular order, as shown in FIG. 6(a).

When editing a film by projecting it on the projector l shown in FIG. 7, the time code reader 3 reads out the time code recorded on the time code track of the film and supplies it to the synchronizer 4.

The synchronizer 4 controls the synchronized operation of the audio tape recorder 2 based on the time code from the time code reader 3 and the time code read by the audio tape recorder 2.

As a result, the audio table recorder 2 reads out from the magnetic tape an audio signal corresponding to the image projected in the projection IIIl and sends it to the audio playback section 6, which amplifies and plays back the audio signal.

[Problems to be Solved by the Invention] Since the conventional audio editing device is configured as described above, the time code sent from the time code reader 3 to the synchronizer 4 is discontinuous in no particular order, and the synchronizer 4 is Since it is difficult to properly follow such time code discontinuities, there is a problem in that the audio tape recorder 2 does not operate in synchronization normally, causing problems in the reproduction of audio signals.

This invention was made in order to solve the above-mentioned problem, and it is possible to perform the synchronized operation of the audio signal reading section normally even if there is discontinuity in the time code recorded on the time code track of the film. The purpose is to obtain an audio editing device that can perform the following tasks.

[Means to solve the problem]

The audio editing device according to the present invention includes a projector capable of projecting a film having a time code track in which time codes are recorded, and a tacho pulse generating means for generating a tacho pulse in synchronization with the projection of the film, and a synchronizer that is capable of projecting a tacho pulse. The video and audio signals are cued based on each time code from the code reader and audio signal readout section.
It has a function of controlling the subsequent synchronous operation of the audio signal reading section based on the tacho pulse from the tacho pulse generating means.

[Function] The synchronizer in this invention uses the time code read out from the film being projected by the time code reader,
Based on the time code read by the audio signal readout unit that plays the audio signal in accordance with the video of the film,
The video and audio signals are located at the beginning of the film, and subsequent synchronized operation for the film is performed in the projector based on the tacho pulse from the tacho pulse generating means, and the synchronized operation of the audio signal readout section is controlled to record on the time code track. To realize an audio editing device which can normally perform synchronous operation of an audio signal reading section even if the time code read is discontinuous.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, 2 is an audio tape recorder as an audio signal reading section, 3 is a time code reader, 5 is an editing section,
Reference numeral 6 denotes an audio reproduction section, which is the same as or corresponds to those of the conventional device denoted by the same reference numerals in FIG. 7, so detailed explanation will be omitted.

Further, 20 is a counter roller as a tacho pulse generating means for generating tacho pulses in synchronization with film projection, and 21 is different from the conventional projector 1 shown in FIG. 7 in that it is equipped with this counter roller 20. It's a projector.

22 is a synchronizer that controls the synchronized operation of the audio tape recorder 2 based on the time code read by the time code reader 3; The video and audio signals are cued based on the time code read out by the camera, and the subsequent synchronized operation for the film is performed based on the tacho pulse from the counter roller 20 of the projector 2l. This synchronizer differs from the conventional synchronizer 4 shown in FIG. 7 in that it controls the synchronized operation of the recorder 2.

Next, the operation will be explained. Here, FIG. 2 is a flowchart showing the operating procedure at the time of assembling and editing.

When the projector 2l starts projecting a film with discontinuous time codes, the synchronizer 4 first performs step STI.
The time code read from the film by the time code reader 3 is matched with the start of the time code read from the magnetic tape by the audio tape recorder 2. That is, the time code from the film and the time code from the magnetic tape shown in FIGS. 6(a) and 6(b) are cued up at "1", respectively, and at that time the tacho pulse generated by the counter roller 20 of the projection m21 is The counter that counts is reset and the same figure (C
), set to count sequentially from "0". Thereafter, in step ST2, while counting the tacho pulses generated by the counter roller 20, the audio table recorder 2 is operated synchronously with respect to the film based on the counted value of the tacho pulses.
A corresponding audio signal is read out from the audio table recorder 2 in synchronization with the image projected by the projector 2l, and is amplified and reproduced by the audio reproduction section.

Further, the synchronizer 22 stores the time code of a predetermined editing point, and compares the time code sent from the time code reader 3 with the stored time code in step ST3. As a result of the comparison, if it is detected that the two match, the process moves to step ST4, a predetermined editing process is executed, and the editing process ends in step ST5.

Next, this editing process will be explained using deletion of unnecessary parts as an example. The synchronizer 22 operates as described above to control the projection t.
ii 2 While synchronizing the audio table recorder 2 with the film being projected, the time codes at the beginning and end of the deleted portion of the film are stored. When unnecessary parts of the audio signal are deleted based on these stored time codes, two audio tape recorders 2, a mask and a slave, are used. In the audio table recorder 2 on the mask side, a cue is found in step STI, and an audio signal is reproduced from the magnetic tape on the mask side in step ST2. At this time, the audio table recorder 2 on the slave side is in a recording state, and the audio signal reproduced by the audio table recorder 2 on the mask side is recorded as it is on the magnetic tape on the slave side.

When the reproduction of the audio signal in the audio table recorder 2 on the mask side advances to the time code at the beginning of the deleted portion, the synchronizer 22 temporarily stops both audio table recorders 2. Next, only the audio table recorder 2 on the mask side is advanced to the last time code of the deleted portion and temporarily stopped, and in this state, the audio table recorder 2 on the mask side is put into the playback state, and the slave
Put the side audio table recorder 2 into recording mode.

This makes the editing point extremely accurate, and the edited audio signal with unnecessary parts deleted is recorded on the slave side magnetic tape.

In the above embodiment, an audio tape recorder using a magnetic tape is used as the audio signal reading section, but a randomly accessible magnetic disk medium such as a hard disk or a magneto-optical disk may also be used.

In this case, there is no need to record the edited audio signal on the slave side disk, so editing can be performed only on the mask side disk.

Furthermore, in the above embodiment, a general audio tape recorder that does not have a separate memory was described, but it may also be a magnetic tape type tape recorder that is equipped with a memory that can store audio signals for a certain period of time. In such a case, if the unnecessary audio signal to be deleted is within the predetermined time period, it becomes possible to perform the editing process without stopping the table recorders on the mask side and the slave side midway.

[Effects of the Invention J] As described above, according to the present invention, video and audio are cued based on the time code from the film being projected and the time code read by the audio signal reading section, and subsequent Since the synchronized operation of the audio signal reading section is executed based on the tacho pulse from the tacho pulse generating means, when editing the audio signal for a film such as a movie, the time code recorded on the time code track can be used. Even if the signal is discrete and discontinuous, there is an effect that an audio editing device can be obtained in which the audio signal reading section can normally perform synchronized operation.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an audio editing device according to an embodiment of the present invention, FIG. 2 is a flowchart showing the operating procedure during assembly editing, and FIG. 3 is a block diagram showing a system for recording time codes during shooting. , Fig. 4 is an explanatory diagram showing the state of time code recording on the time code track, Fig. 5 is a block diagram showing the system for recording time code during printing, and Fig. 6 is an explanatory diagram showing the state of time code recording on the time code track. FIG. 7 is a block diagram showing a conventional audio editing device. 2 is an audio signal reading unit (audio table recorder), 3
5 is a time code reader, 5 is an editing department, 20 is a tacho pulse generating means (counter roller), 2l is a projector, and 22 is a synchronizer. In addition, in the figures, the same reference numerals represent the same or corresponding parts.

Claims (1)

[Claims] A projector capable of projecting a film having a time code track recording a time code, and equipped with a tacho pulse generating means for generating a tacho pulse in synchronization with the projection of the film, and audio corresponding to the image of the film to be projected. an audio signal reading section that reads out a time code corresponding to a time code recorded on a time code track of the film recorded together with the audio signal; A time code reader performs reading, and the video and audio signals are cued based on the time code read out by the time code reader and the time code read out by the audio signal reading section, and the subsequent synchronized operation for the film is performed as described above. a synchronizer that controls the synchronized operation of the audio signal reading section by executing based on the tacho pulse from the tacho pulse generating means; and an editing section that controls the audio signal reading section according to the signal from the synchronizer and executes editing work. An audio editing device equipped with