KR100242661B1 - Method for making up selection menu in multi-angle play-back - Google Patents

Abstract

The present invention relates to a method for constructing a multi-angle screen selection menu for selecting a multi-angle video recorded on an MPEG-2 Program Stream of a digital multi-functional disc (DVD). The present invention provides a menu configuration method for selecting a multi-angle screen in a multi-angle video playback apparatus, comprising: (1) selecting a multi-angle menu; (2) sequentially playing all angle images from the multi-angle image of the selected viewpoint until the next same-angle image starts; And (3) extracting one screen from each of the reproduced angular images and downsampling at a predetermined ratio, and synthesizing and displaying each downsampled angular image on a multi-divided screen. Accordingly, the present invention provides an effect that allows the user to select the image of the desired angle more quickly and easily while viewing the image of all angles.

Description

How to configure multi-angle screen selection menu

The present invention relates to a method for constructing a multi-angle screen selection menu for selecting a multi-angle video recorded in an MPEG-2 program stream. Particularly, when the program stream is multiplexed and recorded on a digital multi-function disc (DVD) The present invention relates to a menu configuration method for selecting a multi-angle screen by reproducing the same.

Due to the recent digitization of video equipment and the large capacity of recording media, MPEG-2 has a Multi-Angle Playback function that enables users to select and view images of various angles by multiplexing images taken from different angles. It is introduced in the DVD-Video (Digital Versatile Disc Video) standard. In the case of the Digital Multi-Function Disc (DVD) standard, up to nine images taken from different angles can be selected and viewed. 1 illustrates a program stream of data compressed to MPEG-2 standard capable of multi-angle playback. As shown in Fig. 1, a multi-angle image is multiplexed so that a plurality of images captured at each angle are repeated at regular time intervals. In addition, the information photographed at the multi-angle is recorded separately the information on the start position of the multi-angle image so that the image for each angle can be reproduced separately. This start position information is referred to as digital search information (DSI). The data retrieval information includes various information such as the starting position of the multi-angle, the number of multi-angle images, and the double speed. Also, the images for each angle have their respective indices, and during reproduction, only images photographed at the same angle are selected by this index, and they are reproduced in a continuous image in association. Unselected images will be skipped. When the recording medium is edited at multiple angles, the user can select and view a desired angle according to a recognition signal generated at a portion capable of multiple angles during playback. At this time, when the user operates the menu key for selecting the multi-angle image, the authorized playback system searches the data retrieval information (DSI) and the angle number corresponding to the angle of the screen currently viewed, the number of selectable angles, and can be selected. It outputs whether or not to the OSD (On Screen Display) screen so that the user can select and view different angle screens.

However, in the conventional multi-angle screen selection menu configuration method, it is possible to know the angle number, the number of selectable angles, and the selection of the current viewing screen through the OSD screen. There is a problem that you can not know without playing the angle directly. Exceptionally, if the information corresponding to the angle of the image is recorded as a part of the image in advance, the information can be used, but the unnecessary information is included in the image, and the limited image provides information on all angles of the image. The problem arises. Of course, the user may play the video of all angles and then select and watch the video of the desired angle. However, in this case, when the desired angle is found, the inconvenience of having to return to the starting point of the multi-angle follows. In addition, there is a problem that the user's interest is halved because the playback portion must be viewed again.

Accordingly, an object of the present invention for solving these problems, by extracting one screen from each of the reproduced angular images and synthesized and displayed on a multi-segmented one screen so that the user can quickly and easily select the image of the desired angle It provides a method of configuring a multi-angle screen selection menu.

1 is a conceptual diagram illustrating an MPEG-2 program stream in a multi-angle video;

2 is a block diagram showing each configuration of a multi-angle video playback device;

3 is a detailed configuration diagram of an image output unit for synthesizing and outputting a plurality of angle images in one screen according to the present invention;

4 is a conceptual diagram illustrating a method of configuring a multi-split composite screen for configuring a multi-angle screen selection menu of the present invention.

* Explanation of symbols for main parts of the drawings

21: data reading unit 22: channel data processing unit

23: angle data separation unit 24: decoding unit

25: image output unit 26: control unit

31: Presentation buffer 32: Low pass filter

33: downsampler 34: frame buffer

35: NTSC / PAL encoder

A method for constructing a multi-angle screen selection menu of the present invention for achieving the above object comprises the steps of: (1) selecting a multi-angle menu in the multi-angle video playback apparatus; (2) sequentially playing all angle images from the multi-angle image of the selected viewpoint until the next same-angle image starts; And (3) extracting one screen from each of the reproduced angular images and downsampling at a predetermined ratio, and synthesizing each downsampled angular image on a multi-divided screen and displaying the same.

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

2 is a block diagram showing each configuration of a multi-angle video playback device for the multi-angle screen selection menu configuration of the present invention. The apparatus of FIG. 2 includes a data reading unit 21 for reading data from a recording medium on which a program stream as shown in FIG. 1 is recorded. The output terminal of the data reading unit 21 is connected to a channel data processing unit 22 that receives the read data, converts it into a predetermined data stream, and outputs the converted data stream. An output terminal of the channel data processor 22 is connected to an angle data separator 23 that receives the above-described data stream and separates multiplexed angle data into respective continuous angle data based on the start position information of the DSI. do. An output section of the angle data separator 23 is connected to a decoder 24 which receives the above-described separated angle data and decodes the data compressed by the MPEG-2 standard into original video and audio signals. . An output terminal of the decoding unit 24 is connected to an image output unit 25 for synchronizing the decoded video signal to the display device. In addition, the apparatus of FIG. 2 includes a control unit 26 for controlling each component for reproducing a multi-angle image.

3 is a detailed configuration diagram of the image output unit 25 for synthesizing and outputting a plurality of angle images in one screen according to the present invention. The image output unit 25 includes a presentation buffer 31 for temporarily storing the images decoded by the decoder 24 described above. The presentation buffer 31 is connected to a low pass filter 32 that receives the decoded images and outputs them through a pass band corresponding to a predetermined downsampling ratio. The low pass filter 32 is connected with a down sampler 33 which receives data output through the low pass filter 32 and downsamples at a predetermined ratio. The downsampler 33 is connected to a frame buffer 34 that receives a plurality of downsampled image data and stores and outputs the same framed time for the frame unit of the image. The frame buffer 34 is configured such that an NTSC / PAL encoder 35 for receiving image data synchronized in units of frames and converting the image data into NTSC or PAL images is output. 2 to 3 having such a configuration will be described in more detail with reference to FIG. 4.

First, in FIG. 2, the data reading unit 21 reads data from a recording medium such as a DVD, on which a program stream according to the MPEG-2 standard is recorded, at a standard playback speed (26.16 Mbps based on channel data rate and 11.08 Mbps based on user data rate). Read out. Data read from the recording medium is input to the channel data processing unit 22 and then output through the EFM Plus demodulation and error correction process. At this time, the output data is a data stream in which the video / audio signal and the DSI information, which are user data, are not separated and multiplexed. The angle data separator 23 receives the above-described data stream and separates the multiplexed angle data into respective consecutive angle data based on the start position information of the DSI. Each of the separated angle data is input to the decoder 24 and decoded into the original video / audio signal from the data compressed by the MPEG-2 standard. At this time, the decoder 24 is a system layer decoder (not shown) that separates the input audio / video signal, and an A / V decoder that receives each of the separated audio / video signals and decodes the original audio / video signal. (Not shown). The A / V decoder is a video decoder (not shown) for decoding a video signal compressed by the MPEG-2 standard into an original signal, and an AC-3 or MPEG-2 for decoding a compressed audio signal into an original signal. Audio decoder (not shown), which is either an audio decoder or a linear PCM decoder. The decoded video and audio signals are stored in respective buffers and reproduced in synchronization with the reproduction time information called Presentation Time Code (PTC).

On the other hand, when the user selects the multi-angle menu to select one of the multi-angle image, under the control of the control unit 26, the data reader 21 before the start of the next same angle image from the multi-angle image of the selected viewpoint Read all angle images in sequence. Subsequently, the read data is input to the image output unit 25 while being decoded through the channel data processing unit 22, the angle data separating unit 23, and the decoding unit 24. At this time, each decoded angular image is extracted by only one screen for each angle, inputted to the downsampler 33 through the low pass filter 32, downsampled at a predetermined rate, and placed at a predetermined position of the predetermined frame buffer 34. Stored. In this case, the predetermined downsampling ratio is predetermined according to the number of multiple angles or the screen configuration method. Considering that the maximum number of screen divisions can be 9 for DVD, 1, 2, 4, 6, and 9 screen divisions are common, so the downsampling ratio is 1, 1/2 or 1/3 for each aspect ratio. It should have a ratio of. On the other hand, when all angle images are collected in the frame buffer 34, each downsampled angle image is synthesized in the form of a still image synchronized with the presentation time code (PTC) to form one NTSC / PAL encoder ( 35), the NTSC / PAL encoder 35 receives the above-described synthesized video signal and converts it into an NTSC or PAL video for display.

For example, in case of four multiple angled screens, if the user selects the multi-angle menu, if the current angle is selected and played, the second angle video and the third angle video are consecutive. , 4 angle video is played sequentially. The four angular images reproduced are extracted only one scene, downsampled at a ratio of 1/2 each of width and length, and then stored in a predetermined frame buffer position for each screen. In more detail, the first angle image at the upper left, the second angle at the upper right, the third angle at the lower left, and the fourth angle image at the lower right can be positioned.

In this case, as shown in FIG. 4, the composition method of one composite screen can be variously configured. 4 is a conceptual diagram illustrating a method of configuring a multi-part composite screen for the method of configuring a multi-angle screen selection menu according to the present invention. 4A to 4E illustrate a method of constructing a composite screen divided into 1,2,4,6,9. In FIG. 4F, a composite screen is composed of one main screen having a size of 4/9 and five sub-screens each having a size of 1/9 in a 9-divided screen. In FIGS. 4A to 4F, the main screen displays an angle screen currently selected and being reproduced in the form of a moving picture, and the plurality of sub-screens can be configured by displaying the remaining selectable angle images as still pictures. In addition, the currently selected and reproduced angle screen can be displayed as a full screen, and a plurality of still images that can be selected can be displayed by PIP (Picture In Picture) processing at each corner.

On the other hand, another embodiment of the present invention, in the multi-angle video playback apparatus of Figure 2, having a configuration having a feature for simultaneously outputting and outputting all the angular images multiplexed and recorded in the program stream, as shown in FIG. As described above, all multi-angle images can be synthesized and displayed on one multi-split screen at the same time. At this time, in order for the multi-angle video reproducing apparatus of FIG. 2 to simultaneously reproduce and output all angle images, each component of FIG. 2 should be faster than the existing reference data processing speed, and this speed is simultaneously reproduced at the existing reference data processing speed. It should be as fast as a multiple of the multiple angle you want to do. More specifically, the data reader 21 and the channel data processor 22 of FIG. 2 should have a speed obtained by multiplying the existing reference data processing speed by the number of multiple angles. In addition, the angle data separator 23 must continuously separate all angle data based on the start position information, and the decoder 24 separates each input angle data into a single decoder or a plurality of decoders using a fast time division method. Decodes should be used to decode. Each of the decoded multi-angle images is stored in the presentation buffer 31 of the image output unit 25, input to the downsampler 33 through the low pass filter 32, and downsampled at a predetermined ratio. It is stored in a predetermined position of the frame buffer 34 in a predetermined format. Subsequently, at a time when images of all angles are collected in the frame buffer 35, a plurality of angle images are synchronized and output simultaneously as moving images on one multi-division synthesis screen.

As described above, the present invention extracts one screen from each of the reproduced angular images, downsamples and displays a composite image into a multi-segmented one, so that the user can quickly and easily view the images of all angles. Provides the effect of selecting an image.

Claims (6)

In the menu configuration method for selecting a multi-angle screen in the multi-angle video playback device, (1) selecting a multi-angle menu; (2) sequentially playing all angle images from the multi-angle image of the selected viewpoint until the next same-angle image starts; And (3) extracting one screen from each of the reproduced angular images, downsampling at a predetermined ratio, and synthesizing and displaying each downsampled angular image on a multi-divided screen. How to configure the screen selection menu. The method of claim 1, wherein step (3) comprises configuring the multi-split screen into one main screen and a plurality of sub-screens. 3. The multi-angle screen selection menu structure of claim 2, wherein the step (3) includes displaying the moving picture of the selected angle on the main screen and displaying still images of the remaining selectable images on the plurality of sub-screens. Way. The method of claim 1, wherein the step (3) displays a moving image of the selected angle on a full screen, and displays a still image by PIP (Picture In Picture) processing on each corner of a plurality of selectable images. How to configure a multi-angle screen selection menu, characterized in that. The method of claim 1, Step (2) is characterized in that for continuously playing the images of all angles at high speed; And In the step (3), the multi-angle screen selection includes downsampling all of the fast-played angle images at a predetermined ratio and synthesizing and displaying all the downsampled angle images on a multi-divided screen. How to configure the menu. 6. The method of claim 5, wherein the step (3) displays all the downsampled angular images as a moving image on one multi-divided screen.

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