KR100351801B1 - Index search device of dvcr - Google Patents

Abstract

PURPOSE: An index search device of a DVCR is provided to easily search a certain program desired by a user and check whether a right program is searched by still images of the searched program. CONSTITUTION: An index search device of a DVCR includes an index data recording part(140) and an index reproducing part. The index data recording part stores 1 frame signal detected from video signals when recording video signals received from the outside and title information of a program to be recorded by a user, and records header information for the stored data. The index data reproducing part reproduces the information recorded to the index data recording part under the control of a controller, and stores program still images and program title defined by the reproduced data. The index data reproducing part searches a certain program by the images and the title to reproduce the program.

Description

DVCR Index Search System

The present invention relates to an index search apparatus for DVCR, and more particularly, to show index data recorded at the beginning of a video tape so that a user can search and play a specific program that the user wants to see immediately after loading the video tape. A DVCR index search device that enables editing.

The index search function applied to a general VCR is a method of recording and playing back an index signal by using a control track of a video tape at a required position in a recording or playback mode. FIG. 1 shows the hardware of an index search device for performing such a method. It is a block diagram.

This means that the control unit 1 receiving an input of a key or a remote controller sends an index signal recording command to the control signal recording unit 2 when the index signal is recorded, and the control signal recording unit 2 receiving the input of the control unit 1 Change the duty ratio of the control pulse to be recorded.

Then, the control pulse changed by the control signal recording unit 2 is recorded on the control track of the video tape 5 via the control head 4.

On the other hand, in the case of recording the index signal and playing it again, the control head 4 sends the control signal read from the control track of the video tape 5 to the control signal reproducing section 3.

Accordingly, the control signal reproducing section 3 detects the index signal by detecting the duty ratio of the control pulse.

When a plurality of index signals are recorded in the above manner, the control unit 1 moves the tape to the high-speed search mode at the initial position of the recorded tape and detects the index signal, and from the portion where the index signal is detected. The index search is performed by playing back the tape for a few seconds.

If there is no conversion input from the playback mode for several seconds to another playback mode, the tape continues to move at high speed until the next index signal is detected, and the above process is repeated to see the screen to be played each time the index signal is detected. It is possible to go to a specific program.

However, the above method has a disadvantage in that it takes a lot of time to search for a specific program when a plurality of programs are recorded, and to search and play all other programs in order to search for any one specific program.

In addition, although a counter is used as a means for searching for a preset image position while the tape is driven, a plurality of image positions that are set by the counter cannot be accurately searched quickly, and a plurality of programs are recorded. In the case of a video tape, there is a problem that a user cannot go to a specific program immediately after loading the video tape.

FIG. 2 is a block diagram of hardware implementing another method of index search, wherein a user sets a plurality of image positions desired by a user on a videotape in which a plurality of programs are recorded, and then returns to a desired position. This is an index search method that can reconfirm the position as a reduced image.

In this method, first, when a user plays back a video tape having a plurality of programs recorded, and presses a switch of the switch panel unit 10 when the desired screen is played back, the address data read from the control track of the current video tape is mainted. Stored in the control unit 9.

At the same time, the still image at the time when the switch of the switch panel unit 10 is pressed by the image reduction unit 6 is reduced and stored in the buffer memory 7.

As described above, the user selects a desired image position by using the switch of the switch panel unit 10 while playing back the tape.

Then, after selecting a plurality of image positions in the above manner, pressing another switch of the switch panel unit 10 causes the still image reduced by the image reduction unit 6 specified by the user to the multiplexer MUX1. When the display is displayed on the original video screen one by one and the user desires to display the image, pressing the switch of the switch panel unit 10 again performs a search operation on the selected screen.

However, in this method, after loading the video tape and playing the tape from the beginning to the end, the user must determine the position of the image to be returned by pressing the switch of the switch panel unit 10, and searching for each program title is not possible. Instead, the user searches only a predetermined place, and when another tape is loaded, the reset memory of the switch panel unit 10 is pressed to clear the buffer memory 7.

In addition, there has been a problem in that it is difficult to display a program title or edit a title, which is information on what program is recorded on a videotape.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to record and reproduce index data at the beginning of a video tape, so that the recorded contents of the video tape can be easily checked so that a user can quickly search for a specific program desired. The present invention provides a DVCR index search apparatus that enables the user to immediately know the title of a program to be searched, the recording time of the program, and the contents of the program.

Features of the present invention for achieving the above object is a control unit for controlling each part according to a key input or a remote control signal input from the user, the I-frame signal detected from the video signal when the video signal is input from the outside and the user A recording unit which stores title information of a program to be recorded and records header information according to the stored data, and reproduces the information recorded in the recording unit under control of the control unit, and the program still image defined in the reproduced data and the title of the program. It is configured to include a reproducing unit for storing and retrieving a specific program through each stored therein.

According to another aspect of the present invention, an I frame detector detects an I frame from a video signal to be recorded during recording, and a memory in which the I frame signal detected by the I frame detector and the title information of a program recorded by the user are stored. And a memory header generator for distinguishing the I-frame signal detected by the I-frame detection unit and the title information of the program recorded by the user when the index data is recorded in the initial portion of the video tape, and the data stored in the memory unit. And an index data recorder for recording header information of the memory header generator.

Still another feature of the present invention is an index data reproducing unit, in which a reproducing unit reproduces index data from a tape according to the control of the control means, and still image header data and program title header of a program recorded on the data reproduced in the index data reproducing unit. The data reproduced by the index data reproducing unit by the memory header discriminating unit which divides the data into the data and the still picture header of the program distinguished by the memory header discriminating unit and the title header of the recorded program are the still image data and the program title data of the program. A memory unit divided into a memory unit, a decoder for decoding the output of the memory unit, an OSD signal generator for outputting program title information as a corresponding character under the control of the controller, and an output of the decoder and the OSD signal generator To output the switching unit It is configured to include.

Control unit for controlling each part of the system according to key input or remote control signal input from the user, I frame detector for detecting I frame from the video signal to be recorded during recording, I frame signal detected by the I frame detector during recording and user recording A memory unit for storing title information of a program, and a memory header generator for distinguishing the I frame signal detected by the I frame detector from the title information of a user recorded program when index data is recorded in an initial portion of a video tape. A recording unit including an index data recording unit for recording data stored in the memory unit and header information of the memory header generating unit, an index data reproducing unit for reproducing index data from a tape under the control of the control unit, and the index data reproducing unit Recorded data played back on the recorded program And a playback unit having a memory header discriminating unit for distinguishing between program still picture header data and program title header data.

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

3 shows a block diagram of a DVCR index search apparatus according to the present invention. (A) shows an index data recording section and (B) an index data playback section.

First, the recording unit includes an I frame detector 110 for detecting an I frame from a video signal to be recorded, and a memory unit 120 for storing the I frame signal detected by the I frame detector 110 and title information of a program recorded by a user. Memory header generator 130 for distinguishing the I frame signal detected by the I frame detector 110 from the title information of a program recorded by the user when the index data is recorded in the initial portion of the video tape. Index data recording unit 140 for recording the data stored in the unit 120 and the header information of the memory header generating unit 130, the control unit 150 for controlling the operation of each part of the system according to a key input or a remote control input from the user Displaying a program title input by the user by receiving a key input or a remote control input from the user under the control of the controller 150 OSD signal generator 160 for converting into a single character signal, decoder 170 for decoding the input video signal, switching unit 180 for switching the output of the decoder 170 and the output of the OSD signal generator 160 It consists of.

Then, as shown in FIG. 3 (b), the reproducing unit is reproduced by the index data reproducing unit 210 and the index data reproducing unit 210 which reproduce the index data from the tape under the control of the control unit 150. A memory header discrimination unit 220 for classifying data into regular image header data and program title header data of a recorded program, and a still image header of a program classified by the memory header discrimination unit 220 and a title header of a recorded program. The memory unit 120 stores data reproduced by the index data reproducing unit 210 by being divided into still image data and program title data of a program, a decoder 170 for decoding the output of the memory unit 120, and the It consists of an OSD signal generator 160 and a switching unit 180 to perform the same function as the recording unit, the memory unit 120, the OSD signal generator 160, the decoder 17 0), the switching unit 180 is common in the recording and reproducing section, and the same reference numeral is used in the recording and reproducing section.

According to the present invention configured as described above, when the user loads a tape on which a plurality of programs are recorded, the index data reproducing unit 210 reproduces the index data recorded in the initial portion of the tape.

The index data reproduced by the index data reproducing unit 210 is divided into a still picture header of a program recorded by the memory header determining unit 220 and a title header of the recorded program, and the memory header discriminating unit 220. The data reproduced by the index data reproducing unit 210 by the program still picture header and the title header of the recorded program divided by are divided into and stored as the still picture data and the program title data of the program in the memory unit 120.

In the above process, a program still image and a program title of a tape on which a plurality of programs are recorded may be reproduced and stored in the memory unit 120.

When the process of reproducing the index data recorded on the tape and storing the index data in the memory unit 120 is completed, a search process for searching for a specific program on a video tape having a plurality of programs recorded thereon is performed.

First, when the user presses the index key, the controller 150 recognizes that the user has pressed the index key, and when the user selects the index search to search for a specific program during index search and index editing, the controller 150 stores the memory. Information corresponding to titles of the plurality of recorded programs stored in the unit 120 is read and transmitted to the OSD signal generator 160.

Accordingly, the OSD signal generation unit 160 receives the program title information from the control unit 150 and outputs a corresponding character, and the output information is switched with the output of the decoder 170 by the switching unit 180 to record. The displayed plurality of program titles are displayed, and an example of the displayed contents is shown in FIG.

At this time, in order to select a program to be searched by the user, a program number to be searched is selected using a shuttle key.

When the program number is recorded, the controller 150 can easily select a specific program by receiving a user's shuttle key input.

When the program to be searched is selected by using the shuttle key, the controller 150 calculates a difference between the number of the program selected by the respondent and the current program number, and finds the program selected by the user with the value, and at the same time, the memory unit 120. Control to output a still image of the program selected by the user, and transmits a signal that the currently selected program number and the program is being searched to the OSD signal generator 160.

At this time, while searching for a program selected by the user, a still picture of the program selected by the user, a program number currently being searched, and a message indicating that the program is being searched are displayed on the screen.

When the search is completed, the desired program is played immediately so that the user can easily find a specific program.

In order to edit the title of a desired program on a videotape in which a plurality of programs are recorded in the above manner, select the index edit after pressing the index key to display the same screen as the index search screen.

As with index search, the program title can be selected in the forward and reverse directions by using the shuttle key, so that the user can select the program title to be edited.

After selecting a program title to be edited, you can use the Jog keys in the forward and reverse directions to easily enter uppercase and lowercase letters, numbers, and special characters (which can be in Korean). can do.

Here, the program title can be edited in the forward and reverse directions by using the jog key, so that the user can edit the program title in a short time.

When the user records a new program, the controller 150 receives the user's recording input and transmits the recording information to the I frame detector 110.

Accordingly, the I frame detection unit 110 detects the I frame from the input video signal and stores the I frame in the memory unit 120. Even if a plurality of new programs are recorded in the above manner, the I frame detection unit 110 stores the I frame of each recorded program. The frame is detected by the I frame detector 110 and stored in the memory 120.

After the user edits the recorded program title or records a new program, recording of the newly changed index data after the program title is input is performed at the time of videotape ejection.

The controller 150 controls the still image data of the program of the memory unit 120 and the title data of the program to be transmitted to the index data recorder 140, and the memory header generator 130 controls the controller 150 in this process. Each memory header is transferred to the index data recording unit 140 in accordance with the control timing of the memory unit 120.

The index data recording unit 140 records the contents of each memory of the memory unit 120, and also records the header information of each of the memory header generating unit 130.

The index data recorded in this way can be easily divided into still picture data and program title data of a recorded program when index data is reproduced.

As described above, the present invention enables a user to easily search and play a specific program that the user wants to watch immediately after loading the video tape in a video tape in which a plurality of programs are recorded, and while searching for a specific program selected by the user. In addition, the program can be easily identified by displaying a still image of the selected program. In addition, program title editing is easy because the jog / shuttle key is used to input or edit the title of an existing program or a newly recorded program.

1 and 2 are block diagrams of a conventional index search apparatus.

3 (a) and (b) are block diagrams of a DVCR index search apparatus according to the present invention.

4 is a diagram illustrating an example in which a plurality of recorded program titles are displayed according to the present invention.

Explanation of symbols for the main parts of the drawings

110: I frame detection unit 120: memory unit

130: memory header generation unit 140: index data recording unit

150: control unit 160: OSD signal generating unit

170: decoder 180: switching unit

210: index data reproducing unit 220: memory header determination unit

Claims (4)

A control unit for controlling each part of the system according to a key input from a user or a remote control signal input; A recording unit for storing the I-frame signal detected from the video signal and the title information of a program to be recorded by the user and recording the header information according to the stored data when recording an externally received video signal; And a reproducing unit for reproducing the information recorded in the recording unit under control of the control unit, storing a program still image defined in the reproduced data and a title of the program, respectively, and searching and reproducing the specific program. DVCR index search device. The recording apparatus of claim 1, wherein the recording unit An I frame detector for detecting I frames in a video signal to be recorded during recording; A memory unit for storing I frame signals detected by the I frame detector and title information of a program recorded by a user during recording; A memory header generator for distinguishing the I-frame signal detected by the I-frame detector from the initial portion of the video tape and the title information of the program recorded by the user; And an index data recording unit for recording data stored in the memory unit and header information of the memory header generation unit. The method of claim 1, wherein the regeneration unit An index data reproducing unit for reproducing index data from a tape according to the control means; And a memory header discriminating unit for dividing the data reproduced by the index data reproducing unit into the still picture header data and the program title header data of the recorded program. The method of claim 3, wherein The reproducing unit is a memory unit in which data reproduced in the index data reproducing unit is divided into still image data and program title data of a program by a still picture header of a program classified by the memory header determining unit and a title header of a recorded program. Wow, A decoder for decoding the output of the memory unit; An OSD signal generator for outputting program title information in a corresponding character under the control of the controller; And a switching unit for switching and outputting the outputs of the decoder and the OSD signal generator.