JPH0678271A - Magnetic recording and reproducing device with tape index function - Google Patents

Abstract

PURPOSE:To generate a tape index by providing a blank part to a head part of a recording tape, fetching still picture data at a set prescribed interval and recording the data onto the blank part. CONSTITUTION:A video signal subject to digital conversion is tentatively stored in a picture memory 1, frame picture data are extracted by a frame extraction section 2 at a preset time interval under the control of a control section 3 and the extracted data are stored in a frame buffer. The control section 3 adds a synchronizing signal to the video signal in the picture memory 1 and reads the resulting signal, a program-search addition section 5 adds a program- search number generated by a character generator section 4 to the signal, and a recording section 6 forms a blank part to a head of a tape and records the result. A still picture group of the frame buffer is read, the character generator section 4 and the program-search number adder section 5 adds the program- search number sequentially and the still picture group is sequentially recorded on the blank part of the head of the tape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus, and more particularly to a recording / reproducing apparatus for recording indexes of contents sequentially recorded on a magnetic tape.

[0002]

2. Description of the Related Art Conventionally, in a magnetic recording / reproducing apparatus such as a video tape recorder, in order to grasp the recorded contents in a short time, a part of each recorded program is recorded as a still image. It is considered to reproduce this and grasp the recorded contents.

FIG. 3 is a block diagram of a conventional magnetic recording / reproducing apparatus. A video signal input from the Vin terminal from the image pickup camera or the image receiver is converted into a digital signal by the A / D conversion unit 30 and sampled, and then supplied to the image memory 31 and temporarily stored. Simultaneous signal adding circuit 32
The video signal synchronously added and read in is modulated by the digital modulator 33, then supplied to the recording / reproducing section 34 and recorded on the magnetic tape via the head.

During reproduction, the video signal reproduced by the recording / reproducing unit 34 is demodulated by the digital demodulator 35 and then supplied to the image memory 36 and temporarily stored therein. The video signal read from the memory 36 becomes an analog video signal in the D / A converter 37 and is supplied from Vout to the monitor.

In this way, the user, while watching the reproduced image on the monitor, presses the still key of the operation unit at the image of the image in the program which he / she wants to use as an index to stop the screen. At this time, since one frame of a still image to be used as an index is stored in the image memory 36, when the index mode is designated by the operation unit, the CPU 38 operates to switch the switch 39, and the information in the image memory 36 is recorded. The image memory 31 is supplied and stored.

Next, the recording tape is rewound to the beginning, and the still image data in the image memory 31 is subjected to the synchronous addition processing,
After the modulation processing, NO1. It is recorded as an index. Similarly, the next program is recorded and reproduced, the index position is designated, the tape is rewound, and the still image to be stored in the image memory 31 is set to NO2.
It is recorded as an index, and these indexes are reproduced to grasp the recorded content.

[0007]

However, in the conventional technique shown in FIG. 3, since the index recording / editing is performed by using the image memories 31 and 36 on the recording side and the reproducing side, the hardware configuration becomes expensive and the index creation is difficult. There was a problem that it took time and effort.

The present invention has been made in view of the above-mentioned problems, and a magnetic recording / reproducing apparatus with a tape index function which does not require any effort even if the hardware configuration is reduced by performing index creation processing at the time of recording. The purpose is to provide.

[0009]

To achieve the above object, the present invention provides an A / D converter for converting an input video signal into a digital signal, an image memory for temporarily storing the digital video signal, and the image. A frame extracting unit that extracts frame image data from a video signal stored in a memory at preset time intervals and stores the frame image data in a frame buffer, a character generator unit that generates additional cue number character data, and the character generator unit. Is added to the frame image data sampling position of the video signal and the extracted frame image data, and the frame image data to which the cue number is combined and added is blanked in advance. The tape index on the blank part of the head of the recording tape Characterized by comprising a recording unit for recording.

[0010]

With the above structure, the digital video signal converted into a digital signal is temporarily stored in the image memory, and the frame image data, which is still image data, is extracted at a preset time interval under the control of the control unit. The unit extracts from the image memory, and stores each extracted frame image data in the frame buffer. The control unit causes the character generator unit to generate a cue number that sequentially indicates each frame image data extraction position,
A tape in which a cue number is sequentially added and synthesized by a cue number adding section at a specified position for extracting frame image data of a video signal from an image memory, and a blank section of a certain length is opened at the head section in a recording section. To record the video signal. After the recording is completed, the tape is rewound, and the blank part of the head part is sequentially combined with the frame image data from the frame buffer under the control of the control part, and the cue number from the character generator part is added and synthesized by the cue number addition part. Since each still image data is recorded in the blank portion of the head of the tape in order in the recording unit, the program content of the recording tape can be grasped at a glance.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a magnetic recording / reproducing apparatus with a tape index function according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 is an image memory for temporarily storing A / D converted digital video signals, and 2 is a frame extracting section. This frame extracting section 2 is a time interval set by an operator from the operation section. The frame image data is extracted from the image memory 1 under the control of the control unit 3 at intervals (for example, every 10 minutes or every 20 minutes),
Buffer (The capacity is 12 if the sampling interval is 10 minutes.
The data is stored in a frame) and the synchronization signal is added.

4 is a character generator section,
The character generator unit 4 extracts the frame image sampling position of the video signal in the image memory 1 and the still image data sampled and stored in the frame buffer as cue number characters [1-1], [1-2]. [1-3] ... is generated by the cue signal character data V / ss, and the read timing from the image memory 1 of the control unit 3 or the frame buffer of the frame extracting unit 2 is designated on the screen by the synchronization signal. The cue number is output by position control. Reference numeral 5 is a cue number adding section for adding and synthesizing the cue number from the character generator section 4 to the image data. Reference numeral 6 denotes a recording unit for recording by recording a blank portion for recording an index still image at the head portion when recording the tape. The same components as those of the other conventional examples are designated by the same reference numerals and the description thereof will be omitted.

Next, the operation will be described. A video signal input from the Vin terminal from an image pickup camera, a receiver, or the like is converted into a digital signal by the A / D conversion unit 30 and subjected to sampling processing, and the control unit 3 controls the image memory 1
Is written to and temporarily stored.

From the video signal stored in the image memory 1, the control unit 3 operates the operation unit to execute an index / index operation by the operator.
The frame image data is extracted by the frame extracting unit 2 at time intervals set and input by key input (not shown) and sequentially stored in the frame buffer. The set time interval is 2 hours for the standard mode tape and 1
If it is 0 minute interval, 10 minutes to 120 minutes will be 12 divisions, and if it is 20 minutes interval, 20 minutes to 120 minutes will be 6 divisions. Also, instead of equal division, 10 minutes-20 minutes-30
Minutes, or 20 minutes-20 minutes-30 minutes-30 minutes-10
It may be divided into minutes, etc. and set.

In this way, by specifying the division position by time and extracting the frame image and setting it as the beginning position of the tape, the tape is formatted in parallel with the image recording process. The control unit 3 uses the image memory 1
The video signal to be stored in the character generator section 4 is read out, the sync addition processing from the sync division circuit 32 is performed, and the frame extraction position address and the screen position by horizontal / vertical synchronization (for example, the upper right corner of the screen) are designated and the character generator unit 4 is set. It is driven to generate the cue number character data, and the cue number adding section 5 additionally synthesizes it at the screen designated position of the frame extracting position of the video signal.

Cue numbers [1-1], [1-2], [1]
-3] ..., to record the combined video signal,
After the digital modulation is performed by the modulator 33, the recording unit 6 is driven, and the control unit 3 starts the recording unit 6 and at the same time, fast-forwards for the first few seconds, and as shown in the tape index explanatory diagram of FIG. A blank section A is provided in the section, and after that, the cue numbered programs (1-1), (1-2), (1-
3) ... is recorded.

After the recording of the program is completed, the tape is rewound once to the beginning, and the control unit 3 sequentially reads each still image data stored in the frame buffer of the frame extracting unit 2 and performs a synchronous addition process to perform character addition. Cue number characters [1-1], [1-2], [1-
3] ... is generated, each still image address and screen city are designated, the cue number addition unit 5 sequentially adds and combines the cue number characters to each still image, and the modulator 33 performs digital modulation. After that, each still image is sequentially recorded on the blank A portion of the previously opened tape.

Next, when reproducing the tape, demodulation,
By playing back the recording tape in the normal playback mode in the playback circuit such as D / A conversion and seeing the still image group of the blank part A of the head, all recorded program contents of the tape can be confirmed at a glance,
If there is a program you want to watch in the still image group, check the cue numbers [1-1], [1-2], ... of the still images and fast-forward and rewind to find the cue number in the recording tape. You can easily find the recorded program you want to watch because it can be checked.

In this embodiment, still images are sampled at time intervals preset by the operator during the recording process and added to the still image sampling positions of the still image from which the cue number is extracted and the program image. Then, the extracted still image group is recorded as a program index in the blank A portion of the head of the recording tape on which the program is recorded, so that the content of the recorded program can be grasped at a glance by viewing the blank A portion during reproduction. At the same time, the cue number is compared to facilitate the cueing of the recorded program, and the hardware configuration for index creation can be reduced and simplified.

[0021]

As described above, according to the present invention, an A / D for converting an input video signal into a digital signal.
A converting unit, an image memory for temporarily storing the converted digital video signal, a frame extracting unit for extracting frame image data from a video signal of the image memory at a preset time interval and storing the frame image data in a frame buffer, and a cue for addition. A character generator that generates number character data, a cue number that adds the cue number to the frame image data extraction position of the video signal and the extracted frame image data, and a cue number that is combined and added Since a recording unit that records each frame image data as a tape index on the blank part of the head of the recording tape that has been blanked in advance, the hardware configuration for index creation can be reduced and the still image of the tape head part can be reduced. The contents of the recorded program can be grasped at a glance by the index and the tape head There is an effect that allows the teeth in a short period of time.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a VTR with a tape index function according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a tape index in the embodiment shown in FIG.

FIG. 3 is a block diagram of a conventional magnetic recording / reproducing apparatus.

[Explanation of symbols]

 1 Image Memory 2 Frame Extraction Section 3 Control Section 4 Character Generator Section 5 Cue Number Addition Section 6 Recording Section 30 A / D Conversion Section 32 Sync Separation Circuit 33 Modulation Section

Claims (1)

[Claims] 1. An A / D converter for converting an input video signal into a digital signal, an image memory for temporarily storing the digital video signal, and a frame at a preset time interval from the video signal stored in the image memory. A frame extracting section for extracting image data and storing it in a frame buffer, a character generator section for generating a cue number character data to be added, and a cue number generated by the character generator section for extracting the frame image data of the video signal. A position and a cue number addition section for adding and synthesizing to the extracted frame image data, and a tape index on the blank section of the head of the recording tape in which each frame image data to which the cue number is combined and added is previously blanked. And a recording section for recording as a tape.・ Magnetic recording / reproducing device with index function.