KR20030056546A - Moving picture player and method for providing thumbnail search picture - Google Patents

Abstract

PURPOSE: A motion-picture reproducing system providing thumbnail search picture and a method of providing a thumbnail search picture are provided to search a desired picture easily and rapidly without watching undesired pictures to reproduce the searched picture. CONSTITUTION: A motion-picture reproducing system includes an input unit(110) for receiving a command with respect to picture search from a user, a data reading unit(120) for reading data from a recording medium storing motion-pictures, a display(130) for displaying a thumbnail image and the motion pictures, a memory(140) for storing the thumbnail image, and a controller(150). The controller extracts I-frames for intra frame compression has not been performed, generates thumbnail corresponding to each of the I-frames and stores the thumbnails in the memory, and displays the thumbnails stored in the memory on the screen of the display when a picture search mode conversion command is inputted through the input unit.

Description

Moving picture player and method for providing thumbnail search screen {Moving picture player and method for providing thumbnail search picture}

The present invention relates to a video player and a control method thereof, and more particularly, to a video player and a method for providing a thumbnail search screen for providing a thumbnail search screen for quickly and easily searching for a desired scene in a video recorded on a recording medium. will be.

Recording data such as a video CD (Compact Disk) and a DVD (Digital Vedio Disk) are generally applied with a coding compression algorithm proposed by a moving picture engineer group (MPEG) to record moving image data. In the apparatus for reproducing the recording medium to which the encoding compression algorithm is applied, the encoded data is read from the recording medium and the original data is decoded from the read encoded data to reproduce the moving picture recorded on the recording medium.

In this case, an intraframe encoding method and an interframe encoding method are used together as an encoding algorithm for recording a moving picture. The intra-frame encoding method is a method of reducing the redundancy of consecutive codes in the direction of the spatial axis in the frame, so that the frame can be restored only by its own information. In addition, inter-frame coding compression reduces the redundancy between frames in the time axis direction, and compresses a code through a difference between a previous frame and a prediction frame of a frame to be currently encoded. At this time, it is difficult to recover a frame only by information through inter-frame encoding, but the amount of data information can be greatly reduced.

In the digital video reproducing apparatus for reproducing the recorded media as described above, the forward / reverse picture search function can be performed in order to make the user easily search for the desired scene while the recording media is reproduced. This is provided. The forward / reverse screen search function sequentially displays screens preset in the selection direction corresponding to the forward or reverse selection keys selected by the user. In this case, the preset screens are screens that do not take a difference from neighboring frames in the encoding and compression process, and are inserted into various parts of the entire video section. As such, inserting a frame that does not differ from surrounding frames around the video is inferior in compression efficiency, but can provide a screen search function.

However, the screen search function as described above has a problem in that the user selects a screen direction in a forward or reverse direction and continues to watch even a scene that he or she does not want. In other words, while looking at the screen displayed in the forward or reverse direction from the current position had to find the scene you want. Because of this, the user had to bother with the unwanted scenes, and it took some time to find the desired scene.

In order to shorten the time required to find a desired scene as described above, the absolute time of another I picture placed before and after the I frame (Intra Frame Picture) that is not different from the surrounding frame is recorded on the recording medium, and the recording is performed. In a medium reproducing apparatus, a high-speed screen searching method for physically moving data reading means based on the absolute time of each I picture recorded on a recording medium to display I pictures on a screen is disclosed in Korean Patent Laid-Open No. 10-1996-19166 Has been proposed.

However, the conventional screen search method can be accessed at high speed. However, as with the previous screen search method, there is still a problem that the user needs to continuously view unwanted screens. The more absolute position information of the I picture, the more absolute time recording. There was a problem that increases the amount of information storage.

It is an object of the present invention to provide a video search apparatus and a thumbnail search screen providing a thumbnail search screen that can quickly and easily find and play the desired scene without the need to see the screen that the user does not want to solve the above problems To provide.

1 is a view showing an example of an arrangement of frames stored in a moving picture recording medium;

2 is a block diagram of a video player according to the present invention;

3 is a flowchart illustrating an operation of a video player of FIG. 2, and

4 is a diagram illustrating a screen configuration of a video player according to the present invention.

* Description of the symbols for the main parts of the drawings *

110: input unit

110-1, 110-2, 110-3, 110-4, 110-5: Input key

120: data reading unit 130: display

130-1: Screen 140: Memory

150: control unit 150-1: I frame extraction module

150-2: thumbnail generation module 150-3: thumbnail display module

150-4: Thumbnail selection compatible playback module 200: Video recording medium

In accordance with one aspect of the present invention, a video player includes: an input unit configured to receive a screen search related command from a user; A data reading unit for reading data by accessing a recording medium having a moving image recorded thereon; A display for displaying a thumbnail image on the screen and displaying the video; A memory for storing thumbnail images; The I-frame is not extracted between frames through the data reader, and a thumbnail corresponding to each of the extracted I-frames is generated and stored in the memory, and the screen search mode switch command is input through the input unit. And a controller configured to control the plurality of thumbnails stored in the memory to be displayed on a screen of the display when input.

Here, the control unit divides all the moving picture sections recorded on the recording medium into constant playback time intervals, and extracts one representative I frame that is reproduced first in each constant playback time interval. Alternatively, each of the representative I frames may be separately recorded in a specific area of the recording medium, and the controller may read out the I frame in the specific area of the recording medium.

On the other hand, a thumbnail selection window is displayed on any one of the thumbnails on the screen of the display, and when the selection window moving command is input through the input unit, the control unit responds to the moving command. Control to be moved to the image.

The controller may be further configured to display the video from the position of an I frame corresponding to the selected thumbnail tomorrow when one of the thumbnails displayed on the screen is selected through the input unit and a playback command is input through the input unit. The data reader is controlled to be displayed.

According to an aspect of the present invention, there is provided a method for providing a search screen of a video player according to the present invention, the method comprising: extracting I frames for which inter-frame compression is not performed from a recording medium on which a moving picture is recorded; Generating a thumbnail corresponding to each of the extracted I frames and storing the thumbnail in a memory; And displaying a plurality of the thumbnails stored in the memory on a screen when a screen search mode switching command is input from a user.

In the thumbnail screen display step, a selection window is displayed on any one of the thumbnails displayed on the screen, and when a selection window moving command is input by a user, a peripheral area corresponding to the selection window in response to the moving command is displayed. Moving to a thumbnail image of the; further includes.

The method may further include reproducing the video from a position of an I frame corresponding to the selected thumbnail image when one of the thumbnails displayed on the screen is selected and a playback command is input.

The screen searching method of the video playback device and the video playback device as described above enables the user to easily and quickly find a desired screen through the thumbnails shown on the screen.

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

1 is a diagram illustrating a frame arrangement of moving images stored in a recording medium. In the drawing, each frame is arranged in the order of I → B → P → P → I → B → P, and the predetermined time intervals t1 to t4 are displayed in front of the entire video section. Here, an I (Intra Frame Picture) frame is a picture encoded with only the information of the picture itself without predicting the front and rear frames, and a P (Predicted Frame Picture) frame is a picture generated through prediction from an I picture or a previous P picture. The B (Bi-directional Frame Picture) frame is a screen generated by bidirectional prediction of each of an I picture and a P picture.

FIG. 2 is a block diagram of a video player according to the present invention for reproducing a video from a recording medium in which a video is recorded with frames arranged as shown in FIG. The video reproducing apparatus includes an input unit 110, a data reader 120, a display 130, a memory 140, and a controller 150.

The input unit 110 receives a screen search related command from the user. In the case of a video player provided in a personal computer, a keyboard and a mouse may be used. In the case of a dedicated recording medium reproducing apparatus, a key input unit provided in the dedicated reproducing apparatus may be used. In this case, a dedicated key for receiving a command for switching to the screen search mode from a user may be provided.

The data reader 120 accesses a recording medium 200 in which a moving image is recorded and reads data.

The display 130 displays a video recorded on the recording medium 200 on a screen so that a user can recognize the video under the control of the controller 150 and outputs a voice through a speaker. In addition, the thumbnail image is displayed on the screen under the control of the controller 150 according to the user's screen search mode switching command.

The memory 140 stores the thumbnail image under the control of the controller 150.

The controller 150 generates an I frame extraction module 150-1 for extracting I frames that are not inter-frame compressed through the data reader 120, and generates thumbnails corresponding to each of the extracted I frames. When the screen generation mode switching command is input through the thumbnail generation module 150-2 stored in the memory 140 and the input unit 110, the plurality of thumbnails stored in the memory 140 are displayed as shown in FIG. 4. The thumbnail screen display module 150-3 to be displayed on the screen 130-1, and any one of the thumbnails displayed on the screen 130-1 are selected through the input unit 110, and the input unit 110 is selected. When the play command is input through the thumbnail selection control module 150-4 to control the data reader 120 to display the video from the position of the I frame corresponding to the selected thumbnail tomorrow.

Here, the I frame extracting module 150-1 divides the entire video segment at regular time intervals, extracts one representative I frame at each interval, and preferably extracts the I frame which is played first during video playback.

The thumbnail screen display module 150-3 controls the thumbnail selection window 130-2 to be displayed at any one of the thumbnails # 6 as shown in FIG. 4. When a selection window movement command is input from the user through the up, down, left, and right moving keys 110-1, 110-2, 110-3, and 110-4 provided in the input unit, thumbnail images (# 2, #) The selection window 130-2 is moved to select 10, # 5, and # 7.

In addition, when a thumbnail selection corresponding playback module selects one of the thumbnails displayed on the screen 130-1 through the input unit 110 and a playback command is input through the input unit 110, I corresponding to the selected thumbnail tomorrow is displayed. The data reader 120 is controlled to display the video on the display 130 from the position of the frame.

FIG. 4 is a flowchart illustrating the operation of the video player shown in FIG. 3. First, when the video recording medium 200 is mounted (S310), the I frame extraction module 150-1 of the controller 150 extracts I frames from the recording medium 200 through the data reader 120 (S310). S320). In this case, the extracted I-frame is divided into all video segments at predetermined time intervals, and is an I-frame that is reproduced first when played in each predetermined time interval. When one representative I frame is extracted for each predetermined time by the I frame extraction module 150-1, the thumbnail generation module 150-2 generates a thumbnail image corresponding to each extracted I frame (S330). In operation S340, the generated thumbnail image is stored in the memory 140. Thereafter, when a screen search mode switching command is input from the user through the input unit 110 (S350), the thumbnail screen display module 150-3 displays the thumbnail images stored in the memory 140 as shown in FIG. 4. It is listed in 1) and displayed to the user (S360). At this time, the thumbnail screen display module 150-3 is positioning the selection window 130-2 in the thumbnail of '# 6', the user up, down, left and right keys (110-) of the key input unit as shown in the lower part of FIG. When the up, down, left, and right movement commands are inputted through 1,110-2,110-3,110-4, the selection window 130-2 in response to input of the up, down, left, right keys ((110-1,110-2,110-3,110-4)) displays thumbnails of up, down, left, and right. If any one of the thumbnail images is selected by the user and the play key 110-5 is selected by the user as described above (S370), the thumbnail selection corresponding playback module of the controller 150 is moved. 150-4 moves the data reader 120 to the position of the I frame corresponding to the selected thumbnail image, drives the recording medium 200 to display the moving image through the display 130 from the position of the I frame. Play back (S380).

On the other hand, according to another embodiment of the present invention, the recording medium 200 having a frame arrangement form as shown in Figure 1 divided the entire video interval by a predetermined time interval, I is reproduced first priority when playing the video at each predetermined time interval Only the frame is selected as a representative I frame and separately recorded in a specific area of the recording medium 200. In the I frame extraction module 150-1 of the controller 150, the data reading unit 120 of the recording medium 200 I frames can be extracted from a specific region.

In the video player providing the thumbnail search screen according to the present invention as described above, thumbnail images of I frames positioned at regular intervals are displayed on the screen, so that the user can select a desired scene immediately, and thus the search time accordingly. This can shorten and avoid the conventional hassle of having to watch for unwanted scenes.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and the general knowledge in the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims. Anyone with a variety of variations will be possible.

Claims (12)

An input unit for receiving a screen search related command from a user; A data reading unit for reading data by accessing a recording medium having a moving image recorded thereon; A display for displaying a thumbnail image on the screen and displaying the video; A memory for storing thumbnail images; The I-frame is not extracted between frames through the data reader, and a thumbnail corresponding to each of the extracted I-frames is generated and stored in the memory, and the screen search mode switch command is input through the input unit. And a controller configured to control the plurality of thumbnails stored in the memory to be displayed on the screen of the display when input. The method of claim 1, And the controller divides each of the moving picture sections recorded on the recording medium into constant playback time intervals, and extracts one representative I frame at each constant playback time interval. The method of claim 2, And the representative I frame is an I frame which is played first with respect to each of the constant playback time intervals during the playback of the video. The method of claim 1, The I frame is divided into all of the moving picture intervals at constant playback time intervals, and one representative I frame is separately recorded in a specific area of the recording medium at each constant playback time interval. And the controller reads out the I frames recorded in the specific area of the recording medium. The method of claim 1, On the screen of the display, a thumbnail selection window is displayed at any one of the thumbnail positions. The controller controls the moving of the selection window to a thumbnail image of the surrounding area in response to the movement command when the selection window movement command is input through the input unit. The method according to claim 1 or 5, The controller is further configured to display the video on the display from a position of an I frame corresponding to the selected thumbnail tomorrow when one of the thumbnails displayed on the screen is selected and a playback command is input through the input unit. Video playback apparatus, characterized in that for controlling the reader. Extracting I-frames in which inter-frame compression is not performed from a recording medium on which a moving picture is recorded; Generating a thumbnail corresponding to each of the extracted I frames and storing the thumbnail in a memory; And And displaying a plurality of the thumbnails stored in the memory on a screen when a screen search mode switching command is input from a user. The method of claim 7, wherein The extraction step, Dividing all moving images recorded on the recording medium by a predetermined play time interval; And And extracting one representative I frame at each of the predetermined playback time intervals. The method of claim 8, The representative I frame is a search screen providing method of a video reproducing apparatus, characterized in that the first I frame is reproduced in the constant playback section at the time of playing the video. The method of claim 7, wherein The I frame is divided into all of the moving picture intervals at constant playback time intervals, and one representative I frame is separately recorded in a specific area of the recording medium at each constant playback time interval. And the control unit reads out the I frames recorded in the specific area of the recording medium. The method of claim 7, wherein In the thumbnail screen display step, a selection window is displayed on any one of the thumbnails displayed on the screen. And moving the selection window to a corresponding thumbnail image of a corresponding peripheral area in response to the movement command when a selection window movement command is input by a user. The method according to claim 7 or 11, wherein And playing back the video from the position of an I frame corresponding to the selected thumbnail image when one of the thumbnails displayed on the screen is selected and a playback command is input. How to provide a navigation screen.