JPH1069759A - Absolute address recording device - Google Patents

Abstract

(57) [Summary] [Problem] To assign an absolute address to a video record to be shot continuously and manage it. Information recorded by adding a frame number to a recording number updated every time a new video is recorded on the same recording medium is recorded on the recording medium as absolute address information for the video recording. It is. When a new video recording is performed, the recording number is updated, so if this recording number and the frame number within that recording number are specified, even if multiple video recording parts are recorded , The video intended by the operator can be retrieved accurately. Therefore, editing work at a broadcasting station or the like can be performed efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absolute address recording device applicable to a video camera for news gathering and the like.
More specifically, information obtained by adding a frame number to a recording number updated each time a new video is recorded on the same recording medium (tape or the like) is recorded on the same recording medium as absolute address information for the video recording. By
The desired frame of the desired video recording can be accurately retrieved using only the absolute address information.

[0002]

2. Description of the Related Art In a recording / reproducing unit (VTR) mounted on a digital VTR or a video camera for news gathering, video information is recorded on an oblique track (helical track) 3 as shown in FIG. Time information, for example, a time code is recorded on a track (linear track) 4 in the longitudinal direction of the tape 2.

The time code is used when editing recorded information. For example, in a video camera for news gathering, when editing while reproducing the recorded information of the tape transmitted to the station or transmitted, the recorded scene (scene)
The search is performed on the basis of the time code.

[0004] For example, as shown in FIG.
.. Are recorded on the same tape by continuous shooting, when a specific frame of a specific scene is specified, a search is performed by specifying a time code. For example, a specific frame of scene 1 can be searched for by specifying a time code (hour: minute: second: code information indicating a frame) recorded in association with scene 1.

[0005]

By the way, since the time code can be arbitrarily set by the user and recorded, the time code is reset and recorded on the tape 2 every time the scene changes as shown in FIG. There is. In such a case, when a plurality of scenes are recorded on the same tape by continuous shooting, the continuity of the time code is not ensured.

Of course, depending on how the time code is set, the magnitude relationship of the time code is reversed between the preceding and succeeding scenes, and a plurality of the same time code often occur. In such a case, the management of the scene by the time code is troublesome, and the frame image of the scene specified by the operator cannot be accurately searched.

When a tape cassette is used as a recording medium, a tape cassette 5 provided with a storage means (for example, an IC memory) 7 on the side surface 6 or the like may be used as shown in FIG. For example, when used for news gathering, it is necessary to have a comment (memo) for the news gathering that tells when, where, which cameraman, what purpose, and how long the recorded time was. If these comments are stored in the storage means 7, the necessary editing can be quickly performed without error by referring to the contents.
There is no mistake in the tape cassette.

FIG. 10 shows an example of the content of a comment. The content of the comment is briefly recorded together with the time code. In some cases, the comment includes important news gathering information that requires a part of the video to be mosaiced to hide the image content.

[0009] Even when a comment is written in such storage means, the search keyword is a time code, but since this time code does not have continuity with another video record, it is stored in the same storage means. There is also a possibility that the time code is stored in the means in duplicate. Therefore, even in such a case, the necessary editing cannot be performed quickly.

In view of the above, the present invention has been made to solve such a conventional problem. Instead of using a time code, even when video recording is continuously shot, the information is recorded on a tape by using information which is an absolute address. The present invention proposes an absolute address recording device that can be used.

[0011]

In order to solve the above-mentioned problems, in an absolute address recording apparatus according to the present invention, a frame number is updated with respect to a recording number updated every time a new video is recorded on the same recording medium. Is recorded on the recording medium as absolute address information for the video recording portion.

According to the present invention, a recording number updated each time a new video is recorded on the same recording medium, for example, a tape, and a frame number at that time are used as absolute address information for the video recording portion. Therefore, when a new video recording is performed, the recording number is updated, so if this recording number and the frame number in the recording number are specified, it is assumed that a plurality of video recording portions have been recorded by being joined. Also, it is possible to accurately retrieve the video intended by the operator.

The absolute address information is recorded on the tape and, if necessary, on the storage means. The tape is recorded in an auxiliary data area of a video signal and an audio signal recorded on a helical track, and is recorded as a part of a video signal as a VITC or as a time code user bit as an LTC. The storage means memorizes the absolute address information and the contents of the comment.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an absolute address recording apparatus according to the present invention applied to a digital recording / reproducing means (VTR) used in a video camera for news gathering will be described in detail with reference to the drawings. Will be described.

FIG. 1 shows an embodiment of the digital VTR 10. A video signal obtained by an image pickup device is supplied to a terminal 12, and this is converted into a digital signal by an A / D converter 13. The digital video signal is a component signal or a composite signal. This video signal is converted into a predetermined signal form by an encoder 14, then supplied to a recording head 16 via a recording amplifier 15, and recorded on the tape 2 as a helical track 3. A time code insertion means 17 is provided at a stage preceding the encoder 14, and a time code to be described later is transmitted to a VITC (Vertical
t Time Code) as part of the vertical blanking period
Written using horizontal lines.

The timing signal from the timing generator 20 is supplied to a time code generator 21 to generate a predetermined time code (hour: minute: second: frame). This time code is recorded on the longitudinal track 4 by the recording head 22. The timing generator 20 can be controlled so as to synchronize with an external reference signal supplied to the terminal 23. In addition, the time code generator 21 can generate a time code that matches the external time code supplied to the terminal 24.

The VTR 10 has a main control unit 30 having an MPU structure. An operation mode command signal such as recording / reproduction output from a key input device 31 is supplied to the VTR 10 so that a tape having the MPU structure is set to a corresponding operation mode. The drive control system 32 is controlled.

The signal indicating the transition state to such an operation mode is supplied to the display device 33 to display the status of the VTR. The display device 33 can also display absolute address information (recording medium and frame number) and the contents of comments, in addition to time code information and frame numbers during recording and reproduction.

In the present invention, a personal computer 35 is further provided in the VTR 10, and serial data (RS-232C or the like) from the personal computer 35 is supplied to the main control unit 30 via the interface controller 36. Is transmitted to the computer 35 via the interface controller 36.

The main control unit 30 is provided with a memory 40 and a frame counter 41 therein to generate a frame number in a recording mode based on a time code or the like. The frame number may be generated from the frame pulse.

According to the present invention, in the VTR 10 configured as described above, information obtained by adding a frame number to a recording number updated each time a new video is recorded on the same tape 2 is added to the video recording. This is generated as absolute address information (frame ID) for the portion, and this is recorded in the tape 2 and, if necessary, the storage means (IC memory, RAM, etc.) 7 built in the tape cassette 5.

In the present invention, absolute address information is recorded at least on the tape 2 in place of the time code. In order to specify the absolute address information as "y-th frame of x-th recording", The address information includes a record number RNO and a frame number FC.

For example, as shown in FIG.
When a plurality of scenes 1, 2,... Are recorded on each other and each of the scenes is composed of a plurality of video recording portions (cuts) which are continuously shot, a recording number RNO corresponding to the cuts
And each time one cut is recorded, the record number R
NO is updated. This update is continuous regardless of the scene. When scene 1 is composed of four cuts and scene 2 is composed of three cuts as shown in FIG. A, the record number RNO is a serial number (1, 2,. .., 8,...). Thus, a specific cut can be designated from the record number RNO.

Next, the number FC assigned to each frame constituting each cut is assigned for each cut.
For example, when the cut 1 is composed of four frames as shown in FIG. B, a continuous number (00, 01, 02, 03) is assigned to the frame number FC only in the cut, and the next cut 2 is a frame again. A serial number is assigned from the beginning after the number FC is reset.

The absolute address information is composed of 4 bytes in this example, as shown in FIG.
Assigned as O, the lower two bytes are assigned as a frame counter FC. If two bytes are applied, one cut of up to about 30 minutes can be recorded. If one cut exceeds 30 minutes, record number R
What is necessary is just to devise so that NO may be updated.

FIG. 2D shows a specific example of an absolute address. When “01 03” is designated as in this example, the fourth frame of cut 1 can be immediately searched.

This absolute address information is recorded on the tape 2. In the present invention, the absolute address information is recorded in a user bit of the VITC in addition to being recorded in at least the AV auxiliary data area such as a vertical blanking period. Further, in the present invention, the absolute address information having the same content is recorded by using the LTC user bits recorded on the longitudinal track 4.

Since the VITC can read data even when the tape is stopped, and the LTC can read the information correctly even in the high-speed running mode, if the absolute address information is recorded in a plurality of locations as described above, the complementary functions can be mutually performed. In any running mode from operation to stopping to high speed, absolute address information can be reliably detected. VITC,
If absolute address information is recorded in the LTC area,
The absolute address information can be reproduced using any VTR.

In the present invention, the comment information is further recorded in the storage means 7 provided in the tape cassette 5 as necessary, and the above-described absolute address information is used as reference information as a search for the comment information.

FIG. 3 shows a configuration example of a memory area in the storage means 7 used at this time. As shown in the figure, the maker use area has an area 8 for recording the next recording number RNO, in which a new recording number RNO advanced by one for each recording mode is automatically recorded. This makes it easy to confirm the next record number RNO. Even when a comment is not inserted in a certain cut i and a comment is stored in the next cut (i + 1), (i + 1) is automatically written as the record number RNO in the area 8.

The user use area includes an area 9a for storing comment contents and an area 9b for storing absolute address information (frame ID) corresponding thereto. FIG. 4 shows an example of the stored contents. FIG. A shows “Photographer name,
The content indicating “the type and location of the equipment” is created as a comment, and this is the fifth (0005) cut (02).
42) This is an example in which a frame is stored in the tape cassette 5. The comment is created using the personal computer (PC) 35 shown in FIG. The content of the comment is an example.

FIG. 2B shows a comment stored at the (0001) frame in the (0025) cut,
Also, a comment (OK cut) indicating that the (0025) -th cut can be used as it is is inserted. When it cannot be used as a video, a comment such as (NG cut) is inserted.

Now, the processing for generating such absolute address information, the processing for recording on the tape 2, and the processing for storing it on the tape cassette 5 will be described with reference to FIG.

First, when the tape cassette 5 is mounted (cassette-in) on the main body of the VTR, the information (the next recording number) stored in the area 8 from the storage means 7 is read using a reading means (not shown). Lead (Step 5
1). Thereafter, when the recording mode (Rec mode) is designated, the frame counter 41 is reset (step 5).
2, 53), the recording number RNO is incremented, a new recording number is written in the area 8, and the recording mode is shifted to execution (steps 54, 55).

When the recording mode is started, the count-up operation of the frame counter 41 is started, and when the frame is updated, the absolute address information at that time (the recording number RNO and the frame number FC before the update) are frame by frame. Recording is performed at predetermined positions (three places) on the tape 2 (steps 56 to 58).

Next, when a comment is input from the personal computer 35 and a comment input operation is performed, the absolute address information at the time of the operation and the comment content are stored in the corresponding areas 9a and 9b. (Steps 59 and 60). Whether or not a comment is input is determined by referring to the comment flag. When a comment is entered and the contents are stored, and when there is no comment and the recording mode is continued (when the stop mode is not selected), every time the frame is updated The same recording number and the updated frame number are sequentially recorded on the tape 2 (steps 59 and 6).
0,61,58).

When the stop mode is selected, the frame counter 41 is stopped (reset) (step 62), and while the tape cassette 5 is mounted, the process returns to the first step 51 to perform the same processing.
The recording medium RNO is automatically updated (incremented) (step 54).

The comment can be input during the recording of the news gathering, as described above, or at the stage when the recording is completed. FIG. 6 shows an example of inputting a comment after recording.

With the tape cassette 5 mounted, the reproduction mode is set and the absolute address information is read from the tape 2. When the necessary cut is reproduced, the tape 2 is stopped (steps 71 and 72). Then, a comment is input, and a comment is added to the absolute address information at the time of tape stop and stored in the storage means 7 (steps 73 and 74). When the mode transits to the reproduction mode again, the process returns to the first step 71 and the same operation as described above is repeated (step 75).

In the stop mode, if the cut is an inappropriate cut for inserting a comment (step 73), the process returns to step 71 and an appropriate cut is searched again. When the tape cassette 5 is ejected in the stop mode, the process exits from the comment input mode.

Although a tape is used as a recording medium in the above description, a video and audio recording / reproducing apparatus adopting a configuration in which a sub recording medium for recording user data is added in addition to a main recording medium. As long as the information is used as information, the present invention can be applied even when the recording medium is a film or a disk (such as a magneto-optical disk).

[0042]

As described above, according to the present invention, information obtained by adding a frame number to a recording number updated each time a new video is recorded on the same recording medium is used as an absolute address for the video recording portion. The information is recorded on a recording medium.

According to this, even when the video scene is composed of a plurality of video recording portions that are continuously shot, the target video recording portion can be reliably searched. Therefore, editing work at a broadcasting station or the like can be performed efficiently.

When a tape is used as a recording medium and storage means such as an IC memory is provided in a cassette in which the tape is stored, absolute address information and comments for news gathering can be stored in this storage means. Utilization can be used to perform search and cueing without fail.

Therefore, the present invention is very suitable for application to a video camera integrated with a VTR for news gathering.

[Brief description of the drawings]

FIG. 1 is a system diagram of a main part showing an embodiment when an absolute address recording device according to the present invention is applied to a digital VTR.

FIG. 2 is a diagram illustrating a configuration example of a memory area in a storage unit.

FIG. 3 is a diagram illustrating a relationship between a frame ID and a comment stored in a memory area.

FIG. 4 is a diagram showing a relationship between a frame ID and a comment stored in a memory area.

FIG. 5 is a flowchart illustrating an example of writing an absolute address to a tape and a storage unit.

FIG. 6 is a flowchart illustrating an example when a comment is stored in a storage unit during video recording.

FIG. 7 is a diagram showing a recording example of a time code.

FIG. 8 is a diagram showing the relationship between video recording and time codes.

FIG. 9 is a diagram of a tape cassette with a memory.

FIG. 10 is a diagram illustrating a configuration example of a memory area;

[Explanation of symbols]

10: Absolute address recording device, 2: Tape, 7
... storage means, 21 ... time code generator, 41
... Frame counters

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 17, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

When the recording mode is started, the count-up operation of the frame counter 41 is started, and when the frame is updated, the absolute address information (recording number RNO and frame number FC) at that time is stored in a predetermined position on the tape 2 in frame units. (3 locations) (steps 56-
58).

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction contents]

Next, when a comment is input from the personal computer 35 and a comment input operation is performed, the absolute address information at the time of the operation and the comment content are stored in the corresponding areas 9a and 9b. (Steps 59 and 60). Whether or not a comment is input is determined by referring to the comment flag. When a comment is entered and the contents are stored, and when there is no comment and the recording mode is continued (when the stop mode is not selected), every time the frame is updated The same recording number and the updated frame number are sequentially recorded on the tape 2 (steps 59 and 6).
0,61,57).

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0039

[Correction method] Change

[Correction contents]

With the tape cassette 5 mounted, the reproduction mode is set and the absolute address information is read from the tape 2. When the necessary cut is reproduced, the tape 2 is stopped (steps 71 and 72). Then, a comment is input, and a comment is added to the absolute address information at the time of tape stop and stored in the storage means 7 (steps 73 and 74). When the comment adding operation is continued, the process returns to the first step 71 and the same operation as described above is repeated (step 75).

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0040

[Correction method] Change

[Correction contents]

In the stop mode, if the cut is inappropriate for inserting a comment, the comment adding operation is often continued (step 7).
3, 75), and in that case, the process returns to step 71 and an appropriate cut is searched again. When the tape cassette 5 is ejected in the stop mode, the process exits from the comment input mode.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2 is a diagram showing a relationship between a scene / record number / frame counter.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3 is a diagram showing a configuration example of a memory area in a storage unit.

[Procedure amendment 7]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

[Procedure amendment 8]

[Document name to be amended] Drawing

[Correction target item name] Fig. 5

[Correction method] Change

[Correction contents]

FIG. 5

[Procedure amendment 9]

[Document name to be amended] Drawing

[Correction target item name] Fig. 6

[Correction method] Change

[Correction contents]

FIG. 6

[Procedure amendment 10]

[Document name to be amended] Drawing

[Correction target item name] Fig. 8

[Correction method] Change

[Correction contents]

FIG. 8

Claims (6)

[Claims] An information obtained by adding a frame number to a recording number updated each time a new video is recorded on the same recording medium is recorded on the recording medium as absolute address information for the video recording portion. An absolute address recording device, characterized in that: 2. A tape is used as the recording medium,
The tape is accommodated in a tape cassette, and the tape cassette is provided with a storage means in addition to the tape. The storage means stores the absolute address information together with a comment on a video recording portion. The absolute address recording device according to claim 1, wherein: 3. The method according to claim 2, wherein the absolute address information to said storage means is:
2. The absolute address recording device according to claim 1, wherein the absolute address recording device is written at the time of video recording. 4. The method according to claim 1, wherein the absolute address information to said storage means is:
2. The absolute address recording device according to claim 1, wherein the data is written at the time of video reproduction. 5. The absolute address recording device according to claim 1, wherein a designated frame of a designated video recording portion is designated by designating both the recording number and the frame number. . 6. The absolute address recording device according to claim 1, wherein said storage means is constituted by an IC memory.