KR100200586B1 - Method for inserting search signal in digital recording apparatus - Google Patents

Abstract

The present invention relates to a method of inserting a search signal of a digital recording device, and more particularly, to a method of automatically inserting a search signal for each recording of a digital recording device.

For the purposes of the present invention, the first step of determining whether the standby mode, the second step of determining whether the recording mode if the standby mode in the first step, the second step of generating a search signal for a predetermined time if the recording mode in the second step And a fourth step of stopping the generation of the discovery signal when a predetermined time elapses in the third and third steps.

According to the present invention, the video recording apparatus automatically inserts a search signal each time the camera enters the recording mode after the standby mode (pose) or the power is newly turned on. .

Description

How to insert search signal of digital recording device

FIG. 1 shows the tape travel direction of the standard digital video tape recorder (SD-VCR) and the direction in which the head travels on the track.

2A shows the tape recording format of the SD-VDR.

FIG. 2B is a timing pulse for generating a search signal in the margin area of FIG. 2A.

3 is a flowchart showing a search signal insertion method of a digital recording device according to the present invention.

The present invention relates to a method of inserting a search signal of a digital recording device, and more particularly, to a method of automatically inserting a search signal for each recording of a digital recording device.

Conventional video cassette recorders or video cameras include a video index search system (VISS) method or a video address search system (VASS) search method that enables high-speed search when recording and reproducing search signals on a specific screen. In the case of the stationary type such as a video cassette recorder, signals can be input by using a remote controller, but the video camera needs to record power by turning it on when the users shoot directly, and in stand-by mode or pose mode When re-shooting in (Mode), a new screen is often started between the standby mode and the recording (recording) scene.

The conventional search method has a disadvantage in that a control signal must be added arbitrarily every time a video signal is recorded.

Accordingly, an object of the present invention is to provide a search signal insertion method of a digital recording device which is easy to search during playback by automatically inserting a search signal at a point that changes from a standby mode to a recording mode.

In order to achieve the above object, the present invention provides a first step of determining whether the standby mode;

A second step of determining whether the recording mode is in the standby mode in the first step;

A third step of generating a search signal for a predetermined time in the recording mode in the second step;

And a fourth step of stopping the generation of a search signal when a predetermined time elapses in the third step.

The third step is a search signal insertion method of a digital recording device, characterized in that the search signal is recorded in the margin section of the track of the digital video tape.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the tape travel direction of a standard digital video tape recorder (SD-VCR) and the direction 120 in which the head travels on the track 110.

FIG. 2A shows the tape recording format of the SD-VCR, and the tape recording format includes an IT1 (Insert and Track Information) area 210, an audio area 220, a video area 230, a sub The code area 240 is recorded in the order of the margin area 250.

Here, data such as track information and position information of data for editing are recorded in the ITI area 210, and video and audio data are recorded in the audio 220 and the video area 230, and the sub code area 240 ) Records auxiliary data such as recording date and time. In addition, the margin area 250 is not used, and data necessary by the user can be recorded.

FIG. 2B is a timing pulse for generating the search signal 270 in the margin area 250 of FIG. 2A.

Since the margin area 250 of FIG. 2 corresponding to the end of the track 110 of FIG. 1 is not used in the existing SD-VCR, a certain signal is recorded in this part to detect it as a search signal during reproduction. In other words, a flag is displayed in the margin area 250 to be recorded.

3 is a flowchart showing a search signal insertion method of a digital recording device according to the present invention.

The flowchart of FIG. 3 includes a standby mode determination process 310, a recording mode determination process 320, a discovery signal generation process 330, a T second elapsed determination process 340, and a discovery signal stop process 350.

As shown in FIG. 3, a digital recording apparatus such as an SD-VCR or a digital video camera automatically enters the stand-by mode when moving from a power-off to a power-on or during a pause operation. The microcomputer (not shown) checks the standby mode state (step 310), and then checks whether it is in the recording mode state (320).

As soon as the user moves to the recording mode of the video, that is, the photographing mode, a predetermined signal, which is a search signal, is recorded in the margin area 250 of FIG. 2 for a predetermined time (T seconds). In this case, the search signal makes a search signal recording interval flag in the margin area 250 of the digital video format, and records the search signal by the timing pulse 270 shown in FIG.

Therefore, it is checked whether the moment when the microcomputer (not shown) moves from the standby mode to the shooting mode has elapsed by T seconds (typically 2-3 seconds), and during this time, the search signal is continuously generated and recorded in the margin area 250. When the T seconds elapse, the search signal is stopped (350).

Therefore, whenever a video signal is taken in standby mode or a new power-on mode, the search signal is automatically recorded in the margin area 250 for a defined time.

The search signal recorded in the margin area 250 is detected by a microcomputer (not shown) during playback, so that the user can easily search.

As described above, according to the present invention, the video recording apparatus automatically inserts a search signal every time the user enters the standby mode or the shooting mode after the pause or power is newly turned on. There is an advantage.

Claims (4)

A method of automatically inserting a search signal of a digital video tape recorder, the method comprising: a first step of determining whether to start recording when the digital video tape recorder is in a standby state; A second step of recording a predetermined signal corresponding to the search signal in a specific area on the tape for a predetermined time at the time when the recording starts at the first step; And a third step of stopping the generation of the search signal when a predetermined time has elapsed in the second step. The search signal insertion method of the digital recording apparatus which searches by the search signal when the recorded tape is reproduced. The method of claim 1, wherein the standby state of the first step is a pause and a power off state. The method of claim 1, wherein the search signal is recorded in a margin area that is an end of a digital video tape track. The method of claim 2, wherein the search signal is recorded in synchronization with a timing pulse timing at a predetermined portion of the track.