JP3635851B2 - Video recording / playback device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a laptop-type video recording / reproducing apparatus having, for example, two digital format video tape recorders and two video monitors and having a built-in video editing function.
[0002]
[Prior art]
In video recording / playback devices for business and broadcasting, two video recording / playback devices with a single deck are prepared, a controller for controlling these two devices, and two monitor devices for displaying video and audio signals. I was editing at.
[0003]
The functions of the conventional video recording / playback device include the ability to record two decks simultaneously, dubbing using two decks, and editing on the other deck while playing back on one deck There is.
[0004]
For business use and broadcast use, the video signal itself requires high performance, so the amount of information to be stored increases, and the performance and functions required for video recording and playback devices become more sophisticated. Since the video recording / playback apparatus becomes larger, it has not become mainstream to incorporate two decks.
[0005]
However, with the development of video signal compression technology, it has become possible to record high-quality video signals for business use and broadcasting with a small amount of information.
[0006]
As an example, there is a DV format which is a standard of digital video, and its outline is clarified at an exhibition of broadcasting equipment in the industry.
[0007]
Next, the structure of a conventional video recording / reproducing apparatus will be described with reference to the schematic diagram of FIG.
[0008]
In this video recording / reproducing apparatus, a base unit 31 and a lid 32 provided so as to be able to stand up and down with respect to the base unit 31 constitute a single laptop housing 30. The base portion 31 in the laptop housing 30 has a two-stage structure of a front side low step portion 31A and a back side high step portion 31B.
[0009]
First and second video tape recorders 40 and 41 that can be independently recorded and reproduced are arranged side by side in the back side high step portion 31B of the base portion 31 of the laptop housing 30, and the first The loading openings of the second video tape recorders 40 and 41 (reference numerals 40 and 41 indicate portions of the loading openings) are arranged side by side on the front end surface of the back-side high step portion 31B. In addition, the base unit 31 incorporates editing means (not shown) for editing video / audio signals between the first and second video tape recorders 40 and 41. Then, on the upper surface of the front low step portion 31A in the base portion 31 of the housing 30, the operation portions 33 and 34 of the first and second video tape recorders 40 and 41 are connected to the first and second video tape recorders 40 and 40, respectively. As in the arrangement of 41, the operation unit 35 is provided side by side, and an operation unit 35 of an editing unit (not shown) is provided between the operation units 33 and 34 on the upper surface of the front lower stage portion 31 </ b> A.
[0010]
During editing, the first video tape recorder 40 on the left side is used for reproducing the original digital cassette, and the second video tape recorder 41 on the right side is used for recording on the master digital cassette. The circuit is configured on the assumption that the first and second video tape recorders 40 and 41 are used. The recording and playback functions of the first and second video tape recorders 40 and 41 are configured in exactly the same way, and can record video and audio signals of two line inputs independently. Video and audio signals recorded in two digital cassettes can be reproduced independently and output as two line outputs.
[0011]
On the other hand, the lid body 32 in the housing 30 has a structure having a pair of leg portions 32B and 32C on both sides of the main body portion 32A, and the lid body 32 rotates in the front-rear direction with respect to the base portion 31 to stand up. Then, the main body portion 32A of the lid body 32 is positioned on the back side high step portion 31B of the base portion 31, and in the lying state, the back side high step portion 31B is left and right so that the main body portion 32A just overlaps the front side low step portion 31A. The back side high step portion 31B and the pair of leg portions 32B, 32C of the lid body 32 are hinge-coupled with each other sandwiched between the pair of leg portions 32B, 32C of the lid body 32 from both sides.
[0012]
In the main body portion 32A of the lid 32, the first and second video tape recorders 40, 41 are arranged on the surface facing the front lower step portion 31A of the base portion 31 in the lying state, that is, the surface facing the front in the standing state. First and second video monitors 36 and 37 made of a color liquid crystal panel for individually displaying reproduced video output are provided in the same direction.
[0013]
Further, in the peripheral portion of the first video monitor 36 in the main body 32A, a first display composed of, for example, a fluorescent display tube for displaying editing-related information such as an operation mode and a counter value associated with the first video tape recorder 40. The display means 38 is integrally provided in the same direction as the first and second video monitors 36 and 37.
[0014]
Similarly, in the peripheral portion of the second video monitor 37 in the main body 32A, a second display composed of, for example, a fluorescent display tube for displaying editing-related information such as an operation mode and a counter value associated with the second video tape recorder 41 is displayed. The display means 39 is integrally provided in the same direction as the first and second video monitors 36 and 37. In the case of FIG. 3, the first and second display means 38, 39 are provided at the lower part of the first and second video monitors 36, 37. Good.
[0015]
As a result, the operation units 33 and 34 of the first and second video tape recorders 40 and 41 and the operation unit 35 of the editing means are provided on the surface of the base unit 31 facing the cover body 32 in a lying state. become.
[0016]
In this video recording / reproducing apparatus, using the search dial (circular operation dial in FIG. 3) of each video tape recorder, the start point and end point (edit point) of editing are registered while viewing each video monitor, An editing operation was performed. In addition, the audio level is displayed on the display means 38 and 39 regardless of whether both the video signal and the audio signal are recorded during reproduction.
[0017]
[Problems to be solved by the invention]
In this video recording / reproducing apparatus, even when both the video signal and the audio signal are not recorded, the audio level meter displays the zero level.
[0018]
However, when both the video signal and the audio signal are lost, it becomes necessary to search for the next editing point, so it is necessary to know the tape position at that time.
[0019]
For example, when a cassette tape is loaded and played but there is no video signal and no audio signal, the operator is more likely to have a recording signal behind the tape near the beginning of the tape if the tape position is known Judged as fast forward playback in the forward (fast forward) direction, and conversely, near the end of the tape, judged that there is a high possibility that there is a recording signal in front of the tape and played back in the reverse (rewind) direction. Can do.
[0020]
Therefore, the object of the present invention is to display the position of the tape on the audio level meter display unit when the video signal or the audio signal on the tape is not recorded at the time of reproduction, and facilitate the confirmation of the tape position. An object of the present invention is to provide a video recording / reproducing apparatus that realizes improved editing workability.
[0021]
[Means for Solving the Problems]
In order to solve this problem, a first invention is a level detection unit that detects a reproduction level of an audio signal and a video signal, a tape position detection unit that detects a tape position, a display unit, and a level detection of the level detection unit. Information and a control unit that displays on the display unit from the tape position detection information of the tape position detection unit, and when the video signal or audio signal on the tape is recorded at the time of reproduction, the control unit displays on the display unit When the audio level is displayed and neither the video signal nor the audio signal is recorded, the position of the tape is displayed on the display unit.
[0022]
This facilitates confirmation of the tape position and improves editing workability.
[0023]
In addition, the second aspect of the invention is that in the first aspect of the invention, the tape position display on the display unit is configured to display in 1% units using the segment arrangement, and the existing segment arrangement is used as it is. Thus, it is possible to display high detection accuracy of the tape position.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0025]
FIG. 1 is a block diagram showing the configuration of a video recording / reproducing apparatus according to an embodiment of the present invention. In FIG. 1, a first input video signal and an audio signal are supplied to the first input terminal 1, and a second input video signal and an audio signal are supplied to the second input terminal 2. The digital video tape recorder 3 capable of recording and reproducing can record an input video signal and an audio signal input from the first input terminal 1.
[0026]
Also, the digital second video tape recorder 4 capable of recording / reproducing is a video signal and audio signal reproduced by the first video tape recorder 3 and an input video signal and audio input from the second input terminal 2. Either one of the signals can be selectively recorded. The first and second video tape recorders 3 and 4 are built in one housing, and the operation command from the operation unit 5 is comprehensively controlled by the system control microcomputer 6. In the first video tape recorder 3, the first mechanism drive and tape position detector 12 drives the first mechanism 11 including the magnetic tape traveling system and the rotating magnetic head in accordance with the operation command given from the system control microcomputer 6. A reel pulse is output from the first mechanism 11 to the first mechanism drive and tape position detection unit 12, and the tape position is detected based on this reel pulse, and the tape position information is transmitted to the system control microcomputer 6.
[0027]
The first recording circuit 13 gives a first recording signal to the magnetic tape mounted on the first mechanism 11, and the first reproducing circuit 14 starts from the first magnetic tape mounted on the first mechanism 11. 1 reproduction signal is extracted, and the first level detection unit 15 detects that there is at least one of the video signal and the audio signal (detection of presence / absence of the reproduction signal), and detects the level of the audio signal, Reproduction signal presence / absence information and audio level information are transmitted to the system control microcomputer 6. When there is at least one of the video signal and the audio signal on the audio level meter of the first display unit 16, the system control microcomputer 6 displays the first audio level, and both the video signal and the audio signal are displayed. If not, the first tape position information is displayed.
[0028]
In the second video tape recorder 4, the second mechanism drive and tape position detector 22 drives the second mechanism 21 including the magnetic tape traveling system and the rotating magnetic head in accordance with the operation command given from the system control microcomputer 6. To do. A reel pulse is output from the second mechanism 21 to the second mechanism drive and tape position detection unit 22, and the tape position is detected based on this reel pulse, and the tape position information is transmitted to the system control microcomputer 6.
[0029]
Then, the second recording circuit 23 gives a second recording signal to the magnetic tape attached to the second mechanism 21, and the second reproducing circuit 24 starts from the second magnetic tape attached to the second mechanism 21. 2, the second level detection unit 25 detects that there is at least one of the video signal and the audio signal (detection of presence / absence of the reproduction signal), detects the level of the audio signal, Reproduction signal presence / absence information and audio level information are transmitted to the system control microcomputer 6. The system control microcomputer 6 displays the second audio level on the audio level meter of the second display unit 26 when there is at least one of the second video signal and audio signal, and the second video signal and audio. When both signals are absent, the second tape position information is displayed.
[0030]
Next, a usage pattern of the video recording / reproducing apparatus will be described. FIG. 2 is a schematic diagram showing a display unit of the video recording / reproducing apparatus according to the embodiment of the present invention. 2A is a schematic diagram in which the display unit is configured by a fluorescent display tube, and FIG. 2B is an audio level display on the audio level display unit that is a part of the fluorescent display tube of FIG. FIG. 2 (c) is a schematic diagram showing a tape display on an audio level display unit which is a part of the fluorescent display tube of FIG. 2 (a).
[0031]
The operator (operator) operates the search dial of the operation unit 5 while looking at the first and second video monitors (36 and 37 in FIG. 3, not shown in FIG. 1), and the player on the playback device side to edit. The starting point and ending point of the original tape of the first video tape recorder 3 are registered, and the editing operation is started after the starting point of the master tape of the second video tape recorder 4 on the recording / reproducing side is registered. At the time of registration, the first and second video tape recorders 3 and 4 are searched in the special playback mode, and the presence / absence of the playback signal of the audio signal and the video signal and the audio level detection are detected by the level detection units 15 and 25, When there is an audio signal or a video signal, the audio level information is displayed on the audio level meters of the display units 16 and 26 as shown in FIG. In FIG. 2 (b), the audio level of channel 2 is displayed, segments are arranged horizontally in two rows, the upper row is the channel 1 (CH1) audio, the lower row is the channel 2 (CH2) audio, and the audio As the level increases, the number of segments that light up increases from right to left.
[0032]
If neither the audio signal nor the video signal is present, the tape position information is displayed on the audio level meters of the display units 16 and 17 as shown in FIG.
[0033]
In FIG. 2C, an audio level meter is used for tape position display, and only four segments are lit at the beginning of the tape as shown in the figure. The upper row represents the 10th percentile, and the lower row represents the 1st percentile. For example, at the position of 59%, five upper rows are lit and nine lower rows are lit.
[0034]
For example, when a cassette tape is loaded and playback is performed in the special playback mode as described above and both the video signal and the audio signal are absent, the operator looks at the tape position displayed on the audio level meter, In the vicinity, it is determined that there is a high possibility that there is a recording signal behind the tape, and fast forward reproduction is performed in the forward (fast forward) direction. Conversely, in the vicinity of the end of the tape, it is determined that there is a high possibility that there is a recording signal in front of the tape, and rewind playback is performed in the reverse (rewind) direction.
[0035]
Also, when playing in the special playback mode, there is no video signal and no audio signal, and when the playback signal does not appear during fast forward or rewind in one direction, the operator has approached the end or start of the tape. Is determined by looking at the tape position displayed on the audio level meter, and the tape is ejected and replaced with another tape.
[0036]
As described above, according to this embodiment, when the registration point for editing cannot be found because there is no reproduction signal, the tape position is displayed, so the search direction is determined based on the tape position or the tape is changed. You will be able to
[0037]
Further, in the present embodiment, in order to display a necessary position when there is no reproduction signal, a case where there is no reproduction signal, which is a case where an audio level display is not necessary, is displayed on one display portion called an audio level meter. The space of the display part can be used effectively.
[0038]
【The invention's effect】
As described above, according to the present invention, when the video signal or the audio signal on the tape is recorded at the time of reproduction, the audio level is displayed on the display unit, and neither the video signal nor the audio signal is recorded. By displaying the tape position on the display unit, the tape position can be easily confirmed and the editing workability can be improved.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a video recording / reproducing apparatus according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing a display unit of the video recording / reproducing apparatus according to an embodiment of the present invention. (B) Audio level display (c) Tape position display (figure 3) Schematic diagram showing a conventional video recording / reproducing apparatus
DESCRIPTION OF SYMBOLS 1 1st input terminal 2 2nd input terminal 3 1st video tape recorder 4 2nd video tape recorder 5 Operation part 6 System control microcomputer 11, 21 Mechanism 12, 22 Mechanism drive and tape position detection part 13, 23 Recording circuit 14, 24 Reproduction circuit 15, 25 Level detection unit 16, 26 Display unit

Claims (2)

A level detector for detecting the playback level of the audio signal and the video signal;
A tape position detector for detecting the tape position;
A display unit;
The level detection information of the level detection unit, and a control unit that displays on the display unit from the tape position detection information of the tape position detection unit,
When the video signal or audio signal on the tape is recorded at the time of reproduction, the control unit displays the audio level on the display unit, and when neither the video signal nor the audio signal is recorded, the display A video recording / reproducing apparatus characterized in that the position of the tape is displayed on the part. The video recording / reproducing apparatus according to claim 1, wherein the tape position display on the display unit is displayed in units of 1% using a segment arrangement.

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