JPS60129988A - Editing device - Google Patents

Abstract

PURPOSE:To eliminate effectively a distortion at editing point by recording data repetitively to both edge parts of a tape to simplify the interpolation of data when one of the data is missing thereby editing automatically the data of a rotary type VTR. CONSTITUTION:An output of a buffer memory 14 is applied to a comparator circuit 18 in an arithmetic circuit 16, and when a data 11(B) of a front part of a PCM data 10b' in one frame superimposed on a TV signal of the VTR and a data 11(A) recorded after the preceding frame to the former frame are equal, an output 18a is extracted, the data is reproduced while skipping the data 11(A) recorded at the post part of the preceding one frame, and when the data A, B are not equal and there exists no correlation, the PCM data 10a' and the B included in the 1st frame are extracted at an output 18b and the PCM data B and the 10b' included in the next 2nd frame are extracted at an output 18c. Both the data are subject to weighting of inverted coefficient at variable resistors 19, 20 via an invertedly interlocking coefficient circuit 17 and subject to cross fade, then an edited output 22 is extracted via an adder circuit 21.

Description

[Detailed Description of the Invention] No. 1 The object of the white light is hung directly on the stand, the paneer, and at 6 o'clock the magnetic tape of the video tape recorder (hereinafter referred to as v'rg) records the helical I7 light ( Or playback 1) In the news data, a part of the data of 1 frame +'iil is inserted after the frame one before the frame (magnetic ■, self-recording 1 generation device) This paper relates to the improvement of an editing device using data from.

Prior art and its problems A magnetic bow f"j that helically records (reproduces) a pulse code modulated (hereinafter referred to as PCM) signal on a VTR.
k14 generators are already known. Figure 1 shows PCM audio data 2a, 2b) recorded helically on a magnetic tape 1, for example, but in reality, continuous audio data is recorded using a plurality of 1-type heads. Therefore, discontinuity occurs between the first track 2a and the second track 2b, between tracks 2b and 2c, and between tracks 2n-4 and 2n. 2 like this
Ei, when +4 is live, each track 2a, 2b, 2c
z) There was a problem in which there was a high probability of signal loss (dropout) occurring at the edge portion 3.4 of sS2n. Furthermore,
These PCM Ondo data tracks 2a, 2b, 2c
The PCM of frame 7a and the next frame 7b consisting of odd field 5a and 1 field 5b between vertical synchronization signals 7 is shown in Figure 2. When editing is performed such as joining the data at the position indicated by the symbol 6, the PCM data 5b and data 5c are uncorrelated data, so they are merged at the joining point 8 (joint). No. 14's discontinuous sound, clicks, etc. were generated, and it rotated in the first direction; - Since it was a J head, it had the disadvantage of not being able to control speed and not be able to cross fade.

Purpose of the Invention The present invention was made in view of the above-mentioned drawbacks, and its purpose is to use a rotating VTR to record all PCM data using a special method: to record 1T+Raj and simply cross-fade. and 4i, 1%% of the stone that provides the device.

The main purpose of the invention is to record part of the nil data of one frame of the back door F-Y recorded obliquely on the tape of a rotating head type video tape recorder. Data inserted overlappingly after one of the frames 1J frame 7il-operator 1nu plus data overlapped above All comparison means to detect all matches or mismatches and mismatches At times Todoroki's work is accomplished by providing a complete editing device that is as complete as it is done.

Examples of the invention Hereinafter, all the drawings of the editing device of the present invention will be described in detail.

FIG. 4 is a system diagram showing an embodiment of the PCM data recording device of the present invention, and FIG. 5 is a waveform explanatory diagram. In Figure 10, 9a, 9b, and 9c are the first to third random access memories (hereinafter referred to as RAM), and the data for the Otokuri 1u report is converted into PCM and is stored in the first to third random access memories. RAM9a, R
6PCM audio data 1 supplied to AM9b and RAM9c
0 is the first tt A IVI as shown in FIG. 5 (4).
9aiC1 frame worth of data 10a is stored in the second RAM 9.
Similarly to b, data 10b for one frame is placed in the third R in the center.
Same as A M 9c, data 10c for one frame is t
i[Next to be stored. Next, the PCM data 10a f is read out from the first RAM 9a at high speed, and the data 1 in Figure 5 (■) is read out at high speed.
0a', it is compressed and recorded forward for one input frame, and then the first stored data lla to llb of the data 11 of the second RAM 9b is extracted by km and 1
PC for one frame] is recorded after the VI data 10a'. In this state, the first RAM 9a is empty, so the third
3F of PCM data is written into the RAM9 (!). When the memory data llb of the second RAM9b is reached and the recording of data for one frame as shown in Fig. 5 (t3) is completed. 2nd RA by 111 tour de force of controller 12
Extract data from the first data lla of M9b at high speed and record all data iob' in the same compressed format in the next frame of the 5th (9) (B), then record the data iob' of the 3rd RA
The first stored data 12 among the stored data 12 of M9c
A to 12b can be read out at high speed and the PC for one frame can be read out at high speed.
If recorded after M data 10b'. At this time, the second RA
Since M 9b is available for reading, data subsequent to the first RAM 9a can be written. Figure 5 (B)
), when the recording of data for one frame of the second frame is completed, reading is started from the first data 12a of the third RAM 9c under the control of the controller 12 and continues reading to the end of the RAM 9c of hA. The data is compressed and recorded on the third frame as shown by data 100' in Fig. Data 13 from data 13a to 13b is read out and recorded on the third frame.

At this time, data subsequent to the second RAM 9b is written into the third RAM 9c. By performing any kind of repetition, it is possible to insert the data in the previous part of one frame after the previous frame of the core frame, as shown in Figures 5(B) and 6. becomes.

As mentioned above, the case of editing PCM data recorded on, for example, a VTR tape will be explained in detail with reference to FIGS. 6-8. FIG. 7 is a system diagram of the reproduction editing device. As shown in FIG. Add. 15 is ff17+t' for performing editing work with an editing operation device
Operation of the entire system including l' all k? The control section is fully assembled. The output of the buffer memory 14 is given to a comparator circuit 18 in the arithmetic circuit 16, and the comparator circuit 18 compares data 11(
If the data 11(A) recorded after the previous frame is equal to the data 11(A) recorded after the previous frame, the output 18a is outputted from i(R, and the data 1 recorded after the previous frame is
1 (A) Skip 'i and playback, data A, B
If Jl are not equal and uncorrelated, it is included in the first frame6. PCM data 10a' and B are taken out at output 18b, and PCM data B and 10b' contained in the next second frame is taken out from Lv output 18c. Both of these data are processed by the inverse operation ψh4 series number circuit with the variable resistor 19.20 as shown in FIG. circuit 2
1'f! : It is made so that the +1lifi collection output 22 is taken out by the valve.

``The effect of ``i-color brightness'' was achieved by achieving <4:4 as in Narukami, so data is repeatedly recorded on both edge portions of the tape, and the 411i interval of 34λ when one edge is missing is also easy. Not only that, but it also has features such as being able to automatically edit the data of a rotating VTR and effectively removing distortion at the editing point.

[Brief explanation of the drawing]

Figure 1 is a plan view of a magnetic tape that covers all tracks when PCM data is recorded on a conventional rotary VTR.
Fig. 2 shows the recording speed when recording PCM data on a conventional VTR; Fig. 3 shows data explaining the editing points of conventional PCM data;
+1) System diagram showing Md record system of raw equipment, '4+5 diagram (A
)(B) is a recording format for explaining the method of recording PCM data into a TV signal according to the present invention, and FIG. FIG. 7 is a system diagram showing the concentration (reproduction) system of the magnetic recording and reproducing apparatus of the present invention, and FIG.
The figure is a graph showing the waveform of the graphite graphite signal in the M fish collection section. 1...Magnetic tape 2a, 2b, 2csq2
n” Track 3.4...Edge part 5a...
・Odd number filled 5b... Even number filled 6.8...
・Axis collection points 7a, 7b *** 1 frame period 9a
, 9b, 9c ・m@1st to m3 RAM10
...PCM voice data 11.12.13.Data at the beginning of the first to third RAM 120e controller 13...VTR 14.e.Buffer memory 15...
Editing device 16... Arithmetic circuit 17... Inverse motion coefficient circuit 18.0 ratio soft circuit 19.20... σ-cho variable resistance Ishi 2 engineering... Addition circuit! t#: ￥+゛L91 people Representative of Nippon Columbia Co., Ltd. Patent attorney Yamaro U
beauty

Claims (1)

[Claims] A part of the data before one frame of audio data recorded diagonally on the tape of an 11-head type video tape recorder. The editing device is characterized in that, in addition to the data zentaku means, the overlapped data is added to the ratio means to perform a match or mismatch zenshii'3, and when there is a mismatch, a single row of hayabasa is performed.