JPS6220630B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording and reproducing apparatus used for producing television broadcast programs, etc.
When editing a tape-like recording medium such as a magnetic recording tape such as a VTR, the original tape on which each cut of a broadcast program is recorded is edited in the order of the program composition, and then an image signal, for example, is generated for each cut from a temporary editing tape that is continuously recorded. For example,
In the case of magnetic recording tape, an editing point information detection device is used to create editing information by detecting editing points corresponding to discontinuous points that occur between adjacent cuts of time codes such as SMPTE 80-bit time code. In particular, the present invention is designed to automatically detect and record editing points.

Generally, a VTR used for producing television broadcast programs.
When editing tapes, etc., the raw material tapes, which usually consist of multiple tapes in which the image signals of the program content for each cut are recorded in random order, must be edited in order to avoid deteriorating the image quality of the recorded image signals. Helical tapes that are cheap and easy to operate during editing, such as cassette tapes that are not used directly but are copied from the original tape.
Perform editing work using VTR tapes, etc. First, using such an editing copy tape, the image signals of each cut are temporarily edited in the order of the program configuration to produce a temporary editing tape configured according to the broadcast program. Next, for each cut of the image signal that is sequentially reproduced from the temporary editing tape, the order in which the raw material tape corresponding to each cut is copied to the program broadcasting tape and editing point information such as the start and end of each cut are recorded. A control data recording body is prepared in which editing machine control data is sequentially recorded. Next, the editing machine is controlled based on the editing point information obtained from the control data recording medium to sequentially copy the recorded contents of each raw material tape onto a high-performance broadcasting magnetic tape according to the program contents, and finally Complete the program broadcast tape.

In addition, on the above-mentioned temporary editing tape, audio signals as well as image signals of the program contents are recorded according to the program structure, and editing data such as time codes necessary for producing the finished tape are also recorded. Of course.

Further, as the above-mentioned editing machine control data recording medium for sequentially recording editing point information, it is preferable to use, for example, a so-called floppy disk, paper tape, punch card, or the like. Note that a floppy disk is a type of magnetic disk.
A thin plastic disc coated with magnetic powder is placed in a rectangular case, and can be used by loading it into a recording/reproducing device while in the case.

However, in conventional editing work, in order to detect edit points on a temporary editing tape, editing point information such as the time code superimposed during the production of the temporary editing tape must be extracted from the playback image of the temporary editing tape. Edit points were visually detected and confirmed, and the visually detected edit point information, such as time code, was written down, and then the punch cards, etc. necessary for producing the finished tape for broadcasting mentioned above were created. . Therefore, not only is there a high risk of errors occurring when dictating the editing point information or transferring it to a punch card, but also the editing work, such as creating a punch card for recording control data, requires considerable effort and time. There was a problem.

It is an object of the present invention to solve the above-mentioned conventional problems and eliminate their drawbacks, to automatically detect editing points on a temporary editing tape and record detected editing point information, and to By making it possible to obtain editing information such as cut time, lap time that is the sum of successive cut times, or total time that is the sum of all cut times, the time required for editing work can be reduced to a fraction of the total time. It is an object of the present invention to provide an editing point information detection device which can be significantly shortened compared to the conventional one.

That is, the editing point information detection device of the present invention edits a plurality of series of information signals, each consisting of a series of unit information sections, with the period of arrangement of the unit information sections almost aligned, and also edits each of the series of information signals for each of the series of information signals. Sequentially attaching a section index consisting of a numerical value that changes sequentially in a predetermined manner to each unit information section,
In an editing point information detection device that runs a temporary editing tape recorded almost continuously, detects connecting positions of the series of information signals that are almost consecutively adjacent to each other, and creates editing point information represented by the connecting positions,
Sequentially transmitting the section indicators reproduced from the temporary editing tape through at least one delay element each having a delay amount approximately equal to the period of the arrangement of the unit information sections related to the running speed of the temporary editing tape. a counter that is supplied to at least one comparator, and that is set with a numerical value represented by at least one section index via the at least one delay element and sequentially adds and subtracts a value each time the section index is reproduced; A count output is supplied to each of the at least one comparators, and a numerical value represented by each of the interval indicators sequentially passed through the at least one delay element in the at least one comparator and a sequential count output of the counter. The present invention is characterized in that the discontinuous points of the sequential section indicators are detected as the connection positions based on the results of these comparisons and comparisons.

The invention will be explained in detail below by way of example embodiments with reference to the drawings.

First, in order to facilitate understanding of the present invention, aspects of general broadcasting VTR tape editing work will be described in detail.

Generally, in the first stage of broadcast VTR tape editing work, as shown in Figure 1, each source tape is sequentially loaded into a high-performance broadcast VTR 2 and played back, and the played images are displayed on a monitor 4. While checking the reproduced image signal, the tape time index superimpose device, so-called TTIS
1, and generates a time code consisting of numerical values that change regularly for each frame, such as the SMPTE 80-bit time code mentioned above, on the image signal of each cut recorded on each raw material tape. By recording on the cue track etc. of each raw material tape, a unique time code is added to each cut, and the image signal of each cut played from each raw material tape is recorded with the corresponding time code and tape reel number etc. Together with the identification signal, it is supplied to a simple editing VTR 3, such as a helical VTR, and at the same time, the corresponding audio signals are also supplied directly from the broadcasting VTR 2.
For example, it is possible to record the image signals of each cut from each raw material tape in random order on a simple VTR tape for editing, such as a cassette tape, so that even if the image quality is degraded by the editing process, the image content can be determined. A copy tape for editing that can be used without any problems is produced while monitoring the image content on the monitor 5. In addition, editing information such as time code and reel number is recorded on the cue track of the copy tape, or
Superimposed recording is performed during the blanking period of each frame of the image signal.

Then, in the second stage of editing work, the second
As shown in the figure, the editing copy tape produced as described above is loaded into an editing playback VTR 7, such as a helical VTR, and played back, and the time code added to the playback image signal is supplied to TTIS1''. Editing recording VTR 8 that directly records edited information such as reproduced image signals, audio signals, and time codes as a helical VTR while displaying the converted text signals and superimposed images on the monitor 4. For example, the video signal is supplied to a simple VTR tape for producing a temporary editing tape as a cassette tape, and is displayed on the monitor 5 via the TTIS 1'' together with editing information such as a time code on which simultaneously reproduced image signals are superimposed. However, when making such copies, it is necessary to use a simple VTR 7 for both playback and recording.
and 8 are appropriately controlled by the editing machine 6 to run the magnetic tape loaded in each back and forth, and the image signals of each cut recorded in random order on the editing copy tape are arranged in the order of the program structure. While editing and re-recording, and adding editing information such as time code and reel number to the image signal of each cut, as mentioned above, the image quality was slightly inferior, but it was edited exactly as the finished tape for broadcasting. Create an edit tape.

Then, in the third stage of editing work, the third
As shown in the figure, each raw material tape is sequentially loaded into a high-performance broadcasting VTR 2 in the order of the program structure, and the image and audio signals for each cut are played back, as well as editing information such as time code. While playing back and displaying the image superimposed on the monitor 4 via the TTIS 1, the image signal is appropriately compensated by the image compensator 12, and then transferred to the same high-performance broadcasting VTR 11 for high-performance broadcasting. Copy onto performance magnetic tape to create a finished tape.

As described above, each raw material tape is sequentially played back in the order of the program structure, and the image signal for each cut from each raw material tape is connected to a high-performance broadcasting tape according to the program structure and copied. In doing so, the VTRs 2 and 11 for both playback and recording are appropriately controlled and driven by an automatic editing machine 9. Necessary control data is supplied from a control data recording medium 10 in which necessary editing information such as editing point information such as a time code indicating a time code is recorded as control data.

Conventionally, to create in advance a control data recording body such as a punch card on which such editing control data is recorded, the above-mentioned temporary editing tape is played back and editing point information superimposed on the reproduced image is read. Because the editor had to write down the edited information on the punch card, errors were made as described above, or a great deal of time and effort was required to create the punch card. On the other hand, the device of the present invention reproduces the edit point information recorded on the cue track of the temporary editing tape, automatically detects the discontinuous point of the time code in the edit point information, and Edit point information indicating discontinuous points, etc., is automatically entered into the punch card, so that no human effort is required at least to create the punch card.

FIG. 4 shows a configuration example of an editing point information detecting device of the present invention having the above-mentioned functions of automatic editing point detection and automatic punch card creation. In the illustrated configuration, the temporary editing tape 21 is run at, for example, a normal playback speed, and sequential frames of recorded images, such as SMPTE 80-bit time codes, recorded on the cue track of the temporary editing tape 21 are sequentially read. The time code detector 22 sequentially detects a time code consisting of, for example, a binary code representing a numerical value that increments. The detected sequential time codes are supplied to the synchronization signal detector 31 to generate clock pulses with a repetition period corresponding to the running speed of the temporary editing tape 21, and then to the comparator 23.
For example, by driving a shift register with a clock pulse from the synchronizing signal detector 31, the input signal is supplied with a delay time τ equivalent to one frame interval corresponding to the running speed of the temporary editing tape 21.
The signals are sequentially delayed and supplied to other comparators 25, 27 and 29, respectively, through delay elements 24, 26 and 28 configured to give .

Therefore, if there is an editing point K between frames D and E among the sequential frames A to H recorded sequentially on the temporary editing tape 21, then the editing point K
For example, the time codes of frames A to D detected earlier increment and increase in sequence, and the time codes of frames E to H detected after edit point K also increment in sequence, for example. However, since the time codes before and after the edit point K are assigned completely unrelated to each other, the numerical values represented by the time codes of frames D and E that sandwich the edit point are discontinuous. is common.

In the editing point information detection device of the present invention, in order to detect editing points by automatically determining the discontinuous points of the time codes sequentially detected from the temporary editing tape 21, the frame interval is sequentially determined as described above. The time codes of two sequentially adjacent frames delayed by τ are simultaneously supplied to the editing point processing unit 30, and first, at the beginning of the punch card creation work, the time codes of the first detected frames after the temporary editing tape 21 starts running, for example. The numerical value of the time code of frame A is set to the initial value of the counter 32 as editing start point information.
Thereafter, each time the time code is detected, the counter 32 is incremented by a clock pulse from the synchronization signal detector 31. For example, when the time code value increases sequentially, the counter 32 is incremented sequentially, and in this way, the edit point time code is The successive step count outputs that are counted up and increased sequentially from the initial value of are sequentially supplied in parallel to the above-mentioned comparators 23, 25, 27, and 29, and are sequentially fed to these comparators as described above. Each of the supplied detection outputs is compared and compared with the sequential time code values. Therefore, those comparators 23, 25, 27, 2
When the edit point time code is not included in the sequential time codes that are sequentially supplied to those comparators, each comparison output of 9 is a combination of those time codes and the sequential step count output from the counter 32. Since they all match, they all become "1". On the other hand, each comparator 23, 25, 2
When the edit point time code is included in the sequential detection output time code that is sequentially supplied to 7 and 29, the time code detected after the edit point K and the sequential step counting output of the counter 32 are combined. do not match and become "0". Therefore,
The comparison outputs of the comparators 23, 25, 27, and 29 are supplied to the editing point processing unit 30 via the illegal mismatch elimination processing unit 33, and detection is performed based on "0" and "1" of each comparison output. The edit point K is detected by determining whether the output time code and the step count output match or do not match, and the detected output time code following the edit point K is set again in the counter 32 as an initial value, and then Prepare for editing point detection operation. The edit point information is further supplied to the edit point information output device 34 and recorded on other recording media.

Therefore, in addition to the discrepancy between the above-described sequential detection output time code and the sequential step count output of the counter 32 that occurs after the editing point K as described above, the discrepancy occurs due to a dropout that occurs on the temporary editing tape, for example. This can also occur if the code is not played properly. However, mismatches between the incorrect detection output time code and step count output due to dropouts, etc., occur temporarily, for example, only during a single frame period, and the time code is not normally played back over several frames. Since it can be assumed that there are almost no cases where there is a discrepancy, the illegal discrepancy elimination processing unit 33 determines irregular discrepancies other than edit points due to drop-outs etc. based on the number of consecutive occurrences of discrepancies between the detection output time code and step count output. For example, appropriate processing such as not supplying each comparison output at that time to the edit point processing unit 30 is performed.

Incidentally, detection of a mismatch between the detection output time code and step count output based on the comparison outputs "0" and "1" in these processing units 33 and 30 can be performed by appropriately configuring, for example, an exclusive OR gate circuit. It can be done easily. In addition, the comparators 23, 25, 27, and 29 shown in FIG.
3, 25, 27, and 29 in sequence, and the counter 32
If the step count output from the subtracters 23, 25, 2 is supplied in parallel and subtraction is performed simultaneously, for example, if the time code values are increasing sequentially, the subtracters 23, 25, 2
For example, the difference calculation outputs of 7 and 29 are 0, 1, 2, and 3 when the edit point time code is not included.
However, when the edit point time code is included, the sequential change in the difference calculation output is disturbed, so the manner in which the difference calculation output changes is determined by each processing unit 33, 30 described above. If the discrimination is made appropriately, the same effect as using a comparator can be obtained.

In addition, in the edit point processing unit 30, edit point information is appropriately determined based on continuity or discontinuity between at least two detection output time codes sequentially detected, and the edit point information can be reliably detected. As editing point information, the cut number, roll number, time code of the cut-in point and cut-out point of editing, each cut time, wrap time, total time, etc. are calculated and processed based on the control data from the temporary editing tape 21, and edited. It is supplied to the editing point information output device 34 as point information.

Note that the device of the present invention having the function of automatically detecting edit point information as described above can be configured not only by hardware logic but also by software logic, and in the case of software logic, each of the devices has a single function. Equivalent signal processing can be performed using flexible logic by repeatedly using one delay element and comparator, or by using a memory element as a delay element. In particular, invalid mismatch elimination processing can be performed using various programs. It can be executed by

Next, in the configuration of the apparatus of the present invention shown in FIG. 4, the operating speed of the editing point information output device 34, which actually performs punch card creation, etc., is compared to other circuit parts that only process electrical signals. It becomes much slower. Therefore, if each cut is short and a large number of editing points arrive in a short period of time, the output device 34 may not be able to follow each cut and output incorrect editing point information. . In order to avoid such erroneous output, a memory function is added to the device of the present invention as shown in FIG. That is, as shown in the figure, for example, three edit point information memories 41, 42, and 43 are placed side by side in the edit point information output device 34, and edit point information from the edit point processing unit 30 is supplied in parallel. The memory write control unit 44 is activated by the write pulse from the edit point processing unit 30.
, the editing point information of the memory contents is selectively written into the empty memory that has been output to a punch card or the like in response to read pulses sequentially passed through the output control section 46 and the memory read control section 45. , these three memories are used repeatedly in sequence. If the processing speed of editing point information output is improved in this way, it will be possible to follow the temporary editing tape 21 even if it runs at high speed, so the number of parallel memories and the number of card punchers etc. can be increased appropriately. As a result, the work time for creating punch cards can be significantly shortened.

Note that when automatically detecting edit point information using the device of the present invention, if a time code that includes discontinuous points has been added before editing, for example by using a drop frame, that time code will be automatically detected. It is necessary to modify the manner in which codes are assigned to eliminate discontinuities in time codes other than at editing points.

Next, when detecting edit point information using the apparatus of the present invention, in reality, inaccurate reading of the time code may occur when transitioning from the cut-out point to the cut-in point. In other words, since the cut-out point is the final point of consecutive time codes, it is easy to predict the time code at the cut-out point from the preceding time code and read it accurately, but the time code at the cut-in point Because a time code that is completely unrelated to the code suddenly appears, the reading may become inaccurate, or the previous time code may be retained as it is and the same time code may not be updated for several to tens of frames. may be shown as the detection output. Therefore, when detecting edit points, only the time code of the cut-out point of each cut is used as the accurate detection output, and the time code of the cut-in point is
For example, the number of frames included in the cut is counted by counting the time code read pulses detected after the preceding edit point, and the counted value is subtracted from the value represented by the time code at the cut-out point. By using the calculated value, it is possible to accurately detect the time code of the cut-in point, regardless of whether direct reading is accurate or inaccurate. In this way, even if the detection operation of the time code detector starts slowly, it can operate stably and perform accurate time code detection.

As is clear from the above description, according to the present invention, accurate editing points are automatically detected while the temporary editing tape loaded in the editing point information detection device is running at an arbitrary speed, and editing point information is detected. It is possible to efficiently and automatically create a control data recording body for controlling an editing machine, such as a punch card on which information is recorded. When automatically detecting edit point information, if edit point information such as time code is recorded using the audio track or cue track of the temporary editing tape, high-speed detection of edit point information or audio-specific The present invention can be applied to editing point information detection. Furthermore, when editing point information such as a time code is recorded superimposed on the vertical planking period of an image signal, the present invention can be applied to low-speed detection of editing point information and editing point information detection of an image information signal. Can be done. Therefore,
The editing point information detection device of the present invention can be similarly applied to editing tape-shaped recording media such as various information recording tapes and image films in broadcasting stations and production.
It is possible to efficiently detect edit point information at high speed and with high reliability and to create editing machine control data based on the edit point information.

[Brief explanation of the drawing]

Figures 1, 2 and 3 are block diagrams showing the configuration of a device used for general program broadcasting magnetic recording tape editing work in the order of the work, respectively.
The figure is a block diagram showing an example of the configuration of the editing point information detecting device of the present invention, and FIG. 5 is a block diagram showing another example of the configuration of a part thereof. 1, 1', 1''...Tape time index superimpose device (TTIS), 2, 3, 7,
8,11...VTR, 4,5...Monitor, 6...
Editing machine, 9... Automatic editing machine, 10... Control data recording medium, 12... Image compensator, 21... Temporary editing tape, 22... Time code detector, 23, 2
5, 27, 29... comparator, 24, 26, 28...
...Delay element, 30...Edit point processing unit, 31
...Synchronization signal detector, 32...Counter, 33...
...Illegal discrepancy elimination processing unit, 34...Edit point information output device, 41, 42, 43...Edit point information memory, 44...Memory write control section, 45...Memory read control section, 46...Output control section , 47...
...Edit point information output buffer memory.

Claims (1)

[Scope of Claims] 1. A plurality of series of information signals, each consisting of a series of unit information sections, are edited so that the period of arrangement of the unit information sections is almost the same, and each of the series of information signals is edited in a predetermined manner. A section index consisting of a sequentially changing numerical value is sequentially attached to each unit information section, and a temporary editing tape recorded almost continuously is run to determine the connection position of the series of information signals that are almost consecutively adjacent to each other. In an edit point information detection device that detects and creates edit point information represented by the connection position, the section index sequentially reproduced from the temporary edit tape is arranged in the unit information section related to the running speed of the temporary edit tape. at least one comparator through at least one delay element, each having a delay amount approximately equal to the period of A count output of a counter that sequentially adds and subtracts a numerical value represented by the interval index is supplied to the at least one comparator,
The numerical values represented by the section indicators sequentially passed through the delay elements are compared and verified with the sequential count outputs of the counter, and the discontinuous points of the sequential section indices are connected to the connection point based on the results of the comparison and verification. An editing point information detection device characterized in that the editing point information is detected as a position. 2. In the editing point information detection device according to claim 1, a number is set in the counter based on the numerical values respectively represented by at least two adjacent section indicators via the at least one delay element. An editing point information detection device characterized in that a numerical value is set. 3. In the editing point information detection device according to claim 1, the unit information section included in the series of information signals is determined from the numerical value expressed by the section index corresponding to the connection position detected at the end of the series of information signals. An editing point information detecting device characterized in that the starting end of a series of information signals is detected by inversely calculating the number of edit point information signals.