KR20050003207A - Apparatus for playing real-time image - Google Patents

Abstract

PURPOSE: A real-time image reproducing device is provided to iteratively reproduce previous frames until a new frame is provided when an image is reproduced slowly to prevent image reproduction from being cut off. CONSTITUTION: A real-time image reproducing device includes a video data input unit(10), a video data buffer(16), and a real-time video data output unit(24). The video data input unit receives video data and processes the video data such that the video data is stored frame by frame. The video data buffer stores the video data frame by frame and outputs the current frame when the video data output unit requests the video data buffer to output the current frame. The video data buffer iteratively outputs the current frame until the video data input unit provides the next frame. The real-time video data output unit outputs the frame, which is output from the video data buffer when the video data output unit requests the video data buffer to output it, vertical and horizontal synchronous signals synchronized with the frame to a predetermined monitor in real time to display an image in real time.

Description

Live video playback device {APPARATUS FOR PLAYING REAL-TIME IMAGE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a real-time image playback apparatus, and more particularly, to an apparatus for preventing playback of an image by repeatedly playing back a previous frame until a new frame is provided.

When an FPGA or the like is used to verify a system that requires fast image processing such as high definition television, the video signal is not decoded in real time because real time image processing is difficult. In this case, the monitor may not display an image normally unless the vertical sync VSYNC, the horizontal sync HSYNC, and the frame data are provided in real time. That is, the result image of the FPGA that does not operate in real time cannot be normally viewed through the monitor.

The monitor needs a vertical sync, a horizontal sync, and a frame as shown in FIG. 1A to display a specific image in real time. At this time, the vertical sync and horizontal sync should be well matched to output an image. On the other hand, in a system configured with an FPGA or the like, the frame is played back more slowly than real time as shown in FIG.

Therefore, in the related art, there are a lot of difficulties in outputting or viewing a decoding result on a screen.

The present invention has been made to solve the above-described drawbacks, and when the screen is played back slower than the actual time to provide a real-time video playback device to repeatedly play the previous frame until a new frame is provided to prevent the interruption of video playback Its purpose is to.

According to an aspect of the present invention, there is provided an apparatus for reproducing an image corresponding to provided image data, comprising: an image data input unit configured to input provided image data and to process the image data to be stored for each frame; An image data buffer which stores the provided image data for each frame and outputs the current frame at the request of the real-time image data output unit, and repeatedly outputs the current frame until the next frame is provided from the image data input unit; Requesting the current data frame to the image data buffer, and outputting a frame outputted by the image data buffer and a vertical sync signal and a horizontal sync signal in timing to the preset monitor in real time to display the image in real time. Real time And an image data output unit.

1A is a diagram showing a signal required by a monitor;

Figure 1b is a view showing a signal that is output slower than real time,

Figure 2 is a block diagram showing an embodiment of a real-time video playback apparatus according to the present invention.

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

2 is a block diagram illustrating an embodiment of a real-time image reproducing apparatus according to the present invention, and includes an image data input unit 10, an image data buffer 16, and a real-time image data output unit 24. The image data input unit 10 includes an input line / sink counter 12 and an input image data processor 14. The image data buffer 16 includes first and second buffers 18 and 20 and a multiplexer 22. The real time image data output unit 24 includes an output image data processing unit 26 and a real time output line / sink counter 28.

In the figure, the input line / sink counter 12 in the image data input unit 10 calculates a line of a frame from the provided vertical sync signal and the horizontal sync signal to generate an address to store the frame data, thereby generating an input image data processor ( 14) and change the frame flag when a frame is input. This frame flag change is passed to the multiplexer 22 in the image data buffer 16 and used by the multiplexer 22 to determine the data to be sent to the output image data processing unit 26 in the real time image data output unit 24. . The input image data processing unit 14 write-enabled the first and second buffers 18 and 20 and first and second corresponding to the frame data storage addresses provided from the input line / sink counter 12. 2 Image data provided to a storage location of a corresponding address of the buffers 18 and 20 are stored for each frame.

The first and second buffers 18 and 20 respectively store the image data provided from the input image data processing unit 14 in the storage location of the corresponding address for each frame, and then output the image data in the real-time image data output unit 24. The processing unit 26 outputs the current frame to the output image data processing unit 26 through the multiplexer 22 in response to a request such as reading enable, providing a read address, and the like. The current frame is repeatedly output through the multiplexer 22 until the next frame from 14) is provided. At this time, when the frame flag provided by the input line / sink counter 12 is '0', the first buffer 18 stores the image data provided from the input image data processor 14 and the second buffer 20 The stored frame is output through the multiplexer 22. In contrast, when the frame flag provided by the input line / sink counter 12 is '1', the first buffer 18 outputs the stored frame through the multiplexer 22 and the second buffer 20 input image. The video data provided from the data processor 14 is stored. Of course, the multiplexer 22 appropriately multiplexes the outputs of the first and second buffers 18 and 20 according to the frame flag value and provides them to the output image data processor 26. The first and second buffers 18 and 20 are frame memories which respectively buffer data corresponding to one frame.

The output image data processor 26 requests current frames from the first and second buffers 18 and 20 to receive the frames provided by the first and second buffers 18 and 20 through the multiplexer 22. Provided to a preset monitor (not shown in the figure) and a real-time output line / sink counter 28 outputs the vertical and horizontal sync signals that are timed to this frame in real time, allowing the monitor to display images in real time. .

As described above, according to the present invention, when the screen is played slower than the actual one, the previous frame is repeatedly played before the new frame is provided to prevent the playback of the image. Therefore, when developing a system related to a display such as a high definition television, a DVD player, and a PVR, a decoded image can be appropriately provided. In addition, the product developer can easily demo and debug the product while viewing the properly displayed decoded image.

Claims (3)

An apparatus for reproducing an image corresponding to provided image data, An image data input unit which inputs the provided image data and processes the images to be stored for each frame; After storing the image data provided from the image data input unit for each frame and outputting the current frame at the request of the real-time image data output unit, the current frame is repeatedly output until the next frame is provided from the image data input unit. Video data buffer Requesting the current frame from the image data buffer and outputting the frame output by the image data buffer, the vertical sync signal and the horizontal sync signal in timing to the preset monitor in real time, so that the monitor displays the image in real time. Real time video data output unit Real-time video playback device comprising a. The method of claim 1, The image data input unit may include: an input line / sink counter that calculates a line of the frame from the provided vertical sync signal and the horizontal sync signal, generates an address to store the frame, and changes a frame flag when a frame is input; An input image data processing unit for storing the provided image data frame by frame at a storage location of the corresponding address of the image data buffer corresponding to the storage address provided from the input line / sink counter Real-time video playback device comprising a. The method of claim 2, The image data buffer stores the image data provided from the input image data processing unit in a storage location of a corresponding address for each frame, and outputs a current frame when the real-time image data output unit requests a current frame. The first and second buffers which repeatedly output the current frame until the next frame is provided from the data processor; A multiplexer for multiplexing the output of the first and second buffers according to the frame flag value and providing the same to the real-time image data output unit. Real-time video playback device comprising a.