KR100338421B1 - Apparatus and method for encoding of wide view video - Google Patents

Abstract

The present invention relates to a method of providing a moving picture having a wide viewing angle by compressing and encoding a plurality of moving picture screen data obtained from several video cameras having an arbitrary screen size and then compressing and encoding the same.

To this end, the present invention comprises a screen input unit for obtaining a plurality of moving picture screen data from a plurality of video camera; A screen data synthesizing unit which combines the obtained plurality of screen data to have an arbitrary screen size and combines them; And a video display unit for compressing and encoding the synthesized screen data.

Since the present invention can provide video data of a wide screen synthesized using a plurality of video cameras, it can be usefully used for providing a video of a wide area remote monitoring, internet broadcasting such as soccer and baseball games, nature and urban landscape, etc. Can be.

Description

Apparatus and method for encoding of wide view video}

The present invention can provide a moving image having a wider viewing angle than a method using only one video camera by compressing and encoding a plurality of moving image screen data obtained from several video cameras to have an arbitrary screen size and then compressing and encoding the same. It is about a method.

The prior art in this field is to encode input screen data using only one camera, and to use a zoom out function of the camera to show a large area on one screen. In this case, since the objects on the screen are smaller, it is difficult to grasp the screen contents. In addition, the conventional technology uses a method of encoding the screen data acquired from each camera independently of each other using a plurality of cameras in order to view a large area, and displaying each screen in close proximity when displaying the final screen. There was a problem that synchronization between screens is not performed in time because overlapping or non-displaying areas exist between screens and processing time between screens is different.

In addition, the prior art in this field was a method of creating a picture having a wide viewing angle (up to 360 degrees) and providing it in the form of a picture or a computer file by joining still image data inputted by using one or several cameras. Only the still images were processed for the purpose of precise matching, such as photographs.

The present invention is to provide a video having a wide viewing angle to the user by combining and encoding a plurality of screen data obtained using two or more cameras to have a desired screen size in order to solve the problems of the prior art.

When delivering a video using a PC in a transmission environment such as the Internet, a video having a relatively small screen size is generally used. That is, a video screen that is much smaller than the screen that the PC screen can represent is usually displayed on the PC screen. This is because there is a large amount of data required to express a moving picture, and therefore, the size of the screen is reduced to reduce the amount of data, thereby delivering as many moving picture screens as possible per unit time.

Therefore, if the screen size of a moving video is increased, the amount of data to be transmitted increases, so the number of screens that can be displayed per unit time may be reduced. However, in the case of remote monitoring, which requires monitoring over a large area, it may be more useful to be able to monitor a large area at one time even if the number of displayed screens is small.

In addition, if the Internet transmission environment is improved and a large amount of data can be sent quickly, a method of providing a video having a wide viewing angle may also be usefully used for internet broadcasting such as soccer and baseball games, which need to show a large area at once. When displaying wide-screen video on a PC screen, any size screen can be combined if the PC screen allows it.

The present invention encodes video data having a wide viewing angle that can cover a wide area as described above in real time to be transmitted through the Internet or stored in a digital storage medium, so that the user can view through a PC screen In this case, a plurality of video screen data obtained from several cameras are combined to have a random screen size, and then compressed and encoded.

1 is a block diagram of an encoding apparatus for a wide screen video according to the present invention.

2 is a flowchart of an encoding process of a wide screen video according to the present invention.

The present invention to achieve the above object,

A screen input unit (1) for acquiring a plurality of screen data from several video cameras, a screen data synthesizing unit (2) for successively combining the acquired plurality of screen data to have an arbitrary screen size, and the synthesized screen data And a video encoding unit 4 for encoding the screen data synthesized to have the arbitrary size.

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

1 is a block diagram of an apparatus for encoding a wide screen video according to the present invention.

The screen input unit 1 which acquires a plurality of screen data from several video cameras writes the moving picture data obtained from each camera in a corresponding memory area in units of screens. Input of each screen data is performed by using a known technique of converting an analog video signal into a digital signal using a conventional analog-to-digital conversion circuit for video and then storing it in a memory. If N screens are input using N cameras, N video analog-to-digital conversion circuits and N memory areas for N screen storage are required. Each screen data needs to be adjusted to position the video camera such that some overlapping areas occur at the boundary of the screen between adjacent screens. This is to ensure that no hidden areas occur in creating a wide screen.

The screen data synthesizing unit 2 which combines the obtained screen data to have an arbitrary screen size and synthesizes the plurality of screen data acquired from several cameras to form one wide screen data. The wide screen data can be generated by concatenating multiple screens so that the same screen area does not occur in the wide screen data or a screen area that does not appear. The method of concatenating screen data may be implemented by reading screen data necessary to make a wide screen from a memory area in which a plurality of screen data obtained from several cameras are stored and storing the screen data in a separate memory area. Another method is to find memory address information of specific area data in each screen data necessary to make a wide screen, and store it in a separate storage memory, and to read the specific area data using the memory address information if necessary. In this way, it is possible to obtain wide screen data without using a separate storage memory for wide screen data.

The synthesized screen output unit 3 for confirming whether the synthesized screen data is properly generated reads the synthesized screen data from the storage memory as in a conventional method of displaying moving image data stored in the memory on a PC screen. Display through the display board. While watching the composite screen displayed through the PC screen, you can adjust the position between multiple video cameras to achieve proper screen composition.

The video encoding unit 4 compressing and encoding the synthesized screen data compresses and encodes the synthesized screen data generated by the screen data synthesizing unit 2. Compression encoding can generate compressed encoded data by using a well-known international standard video encoding method such as MPEG or H.263. The resulting encoding data is transmitted in the form of a bitstream to a remote location via the Internet or stored in a file format in a digital storage device. When delivered to a remote location in the form of a bitstream, it is possible to view a video in real time on the receiving side, and when it is stored in a digital storage device in the form of a file, it can be repeatedly played back if necessary.

The encoding result data is decoded into original synthesized picture data using a known international standard video decoding method corresponding to the encoding method used by the video encoding unit 4, and then output to the PC screen.

FIG. 2 is a flowchart of encoding a wide screen video according to the present invention, and illustrates a process of performing encoding processing of the wide screen video using the encoding apparatus of the wide screen video shown in FIG. 1.

The compression encoding process of the wide screen moving picture is performed in units of screens as in the normal moving picture encoding process. First, an eleventh step of acquiring a plurality of screen data from a plurality of video cameras by using the screen input unit 1 is performed. Perform the twelfth step of generating the synthesized screen data, perform the thirteenth step of generating the compressed coded data by encoding the synthesized screen data by using the video encoder 4, and repeat the process up to the last input screen. An encoding process of the wide screen video is performed by performing the fourteenth step of iterative processing.

The compressed coded data encoded as described above is transmitted in a bitstream form to a remote place through the Internet or stored in a file format in a digital storage device. The compressed coded data transmitted to the remote site in the form of a bitstream is decoded in units of screens on the receiving side and output to the PC screen, thereby providing a video in real time. Compressed coded data stored in a digital storage device in the form of a file is decoded when necessary and output to a PC screen, and iterative reproduction can be performed.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

In the case of remote monitoring, which requires monitoring over a large area, the present invention can be used in comparison with the conventional method, in which it is difficult to grasp the overall situation of the monitoring object due to the inconsistency between the screens by providing and processing several screens separately. Since one wide screen having a wide viewing angle can be provided, it is advantageous to grasp the overall situation of the monitoring object.

In addition, it can be usefully used in internet broadcasting such as soccer and baseball games, which need to show a wide playground on one screen, because it can provide a wide screen having a wide viewing angle that cannot be seen in the conventional method.

In addition, the present invention can be usefully used to provide a wide screen having a wide viewing angle even when showing a natural or urban landscape including a large area.

Claims (2)

A screen input unit which acquires a plurality of screen data from multiple video cameras, A screen data synthesizing unit which combines the obtained plurality of screen data to have an arbitrary screen size and combines them; A synthesized screen output unit for confirming whether the synthesized screen data is properly created, and And a video encoding unit for compressing and encoding the synthesized screen data. In the video encoding method applied to the video encoding apparatus, Acquiring a plurality of screen data from several video cameras, Synthesizing the obtained plurality of screen data by attaching the obtained plurality of screen data to have an arbitrary screen size; And compressing and encoding the screen data synthesized to have the arbitrary size, and repeatedly processing the processing process up to the last input screen.