KR100831704B1 - image board and display method using dual codec - Google Patents

Abstract

The present invention provides an image transmission system for processing a captured image or a stored image to be transmitted through a network, the image transmission system comprising: a high quality processor (120,140) for generating a high quality image by receiving and processing an image; A low quality processor 110 and 130 for processing an image simultaneously with the high quality processor and generating a low quality image; One side of the processed high quality image and the low quality image are transmitted to the user via a network (112, 122), storage (111, 121, 131, 141), restoration (113, 123), remote real-time image restoration (132, 142), remote storage image restoration (133, 143). An image display system using a dual codec and a low-quality image received from the image transmission system during the search and display on the screen, the image display method characterized in that the display is converted to a high-definition image according to the user's selection. As a result, it is usually viewed or searched as a low quality video that occupies a low bandwidth, and when necessary, it is instantly converted to a high quality video and displayed so that it can be searched efficiently. It can be effective. When you try to keep watching the remote video in high quality, there is a case that the video is disconnected because the network bandwidth is not sufficient enough. Play by sending a play command from a remote location. In addition, when multiple screens are simultaneously viewed as split screens, low-quality video is used and high-quality video is used to enlarge one screen, which not only effectively uses network bandwidth but also reduces computation.

Dual codec, network, split screen, bandwidth

Description

Image processing board using dual codec and high quality image display method using same {image board and display method using dual codec}

1: Detailed function of image processing board using dual codec

2 is a conceptual diagram of an image processing board using a dual codec

Figure 3: Product shape using an image processing board using a dual codec

Figure 3: Method for restoring the stored image of the image processing board using the dual codec

Figure 5: Scheme of efficient use of bandwidth in a high speed network

Fig. 6: Viewing high quality images in a slow network

7: Screen display method when viewing a remote high definition image in a low speed network

Figure 8: Image playback after batch transfer of file transfer to single or multiple users

The present invention relates to an image transmission system, an image display method, and an image processing board using a dual codec, and more particularly, an image processing board using a dual codec as input from various image generating apparatuses 20 as shown in FIG. 10) can receive (111, 121), transmission (112, 121), restore the stored image (113, 123) through the low-quality processing unit 110 and the high-definition processing unit 120 and various devices that can transmit the image to a remote place (30) There is a low-quality processing unit 130 and a high-definition processing unit 140 for receiving and processing a real-time image or a file transmitted from the storage (131, 141), and restores the image transmitted from the remote ( 132, 142, and restores the image stored in the remote (133, 143). By dividing the image into low quality processing units 110 and 130 and high quality processing units 120 and 140, the network bandwidth can be efficiently used and the amount of computation can be reduced. In addition, the present invention relates to an image transmission system, an image display method, and an image processing board using a dual codec that provides a method of transmitting an efficient and uninterrupted image with a time delay phenomenon to a user who wants to view a real-time image.

When compressing and transmitting an image, image data has a larger data size than text, which makes it difficult to transmit the image over a network. In particular, when receiving images of a remote site and viewing multiple screens at the same time in real time, or searching for a high-quality image stored in a remote site, high bandwidth and a lot of computational processing are required.

The existing video transmission method is selected from high quality compression and low quality compression.

When video is stored in high quality, the size of the data is large, so it can be disconnected due to network bandwidth problems when the remote data is transmitted to the network in real time or when searching for stored video.

In the case of saving in low quality, viewing or searching from a remote location may be smooth, but the quality of the stored image itself is inferior.

In order to solve the above problems, the present invention can easily perform image viewing / retrieval using a limited bandwidth and can easily obtain a high quality image when necessary, thereby reducing the cost of increasing network bandwidth. Its main purpose is to provide an image transmission system, an image display method, and an image processing board using dual codecs.

The present invention provides a high-definition processor (120,140) for processing a photographed image or a stored image to transmit the image through a network to receive the image as shown in Figure 1 to generate a high-quality image Wow; Technical image of the image transmission system using a dual codec characterized in that it comprises a low-quality processing unit (110,130) for processing an image at the same time as the high-definition processing unit, but generates a low-quality image.

The input of the image processing board using the dual codec is to transmit the image to the remote place through the network and the image processing unit 11 inputted from the image generating apparatus that receives and processes the image from the image generating apparatus 20 as shown in FIG. It is divided into an image processing unit 12 transmitted from a remote site for receiving and processing a real-time image or file from the device 30.

When the image transmission processing board 10 using the dual codec processes an image input from the image generating apparatus 20 of FIG. 2, the image is input to the image processing unit 11 inputted from the image generating apparatus, thereby causing a low quality processing unit. Sending to the 110 and the high-definition processing unit 12 generates a low quality image and a high quality image at the same time.

When the image received from the image generating apparatus 20 is generated as a low quality image by the low quality processor 110, the image is stored on the recording medium (111) or transmitted to the network (112). It restores 113 and displays it on the display apparatus 60, such as a TV or LCD monitor.

When a real-time image or a file is received through the device 30 capable of transmitting an image to a remote place through a network instead of the image generating device 20, the image is transmitted to the image processing unit 12 transmitted from a remote place. In the case of low quality processing unit 130 to restore to the recording medium (131) or to show on a TV or LCD monitor (132), if necessary, by remotely receiving files stored in the network to restore the image TV or LCD It shows by the monitor, etc. This is called remote image restoration (133).

If a file is received other than the real time image, the file is restored (132, 142) after the file is transmitted. At this time, it can be played on TV or LCD monitor by sending command from remote place.

As shown in FIG. 3, the image processing board 10 using the dual codec can be used as a standalone device by wearing only the case 40, and can be used by making it into a PC card 50 form.

If you need to send four images over a network, the conventional method is, for example, the resolution of a monitor is 640x480, the resolution of a high-definition video is 640x480, the low resolution is 320x240, and the user wants to use high quality. If you want to see the camera video at the same time, 640x480x4 video should be transmitted. The transmitted image must be reduced to 1/4 to reconstruct and fit the monitor resolution of 640x480.

That is, 640x480x4 images are transmitted, and each image needs to be 320x240x4 images and displayed on the screen to match the resolution of the monitor.

In this case, there is an advantage in that the image quality can be maintained even when zooming in to view a single camera, but there is a disadvantage in that the operation is increased because the network bandwidth must be allocated and the image must be reduced and displayed.

If the user wants four images of 320x240, which is a low resolution, the combined images can be displayed on the screen.

The advantage is that the network bandwidth is small (320X240X4) and the computation is small, but there is a disadvantage that the image quality is deteriorated when you want to see one camera of interest on the enlarged screen.

When displaying the image by restoring the stored image using the dual codec image processing board 10, as shown in FIG. 4, the low quality image processing unit 110 receives the input from the image generating apparatus 20 and always has a low quality. Since the image is stored 111 and the high quality processor 120 always stores the high quality image 121, the low quality image stored through the storage 111 function of the low quality processor 110 should be viewed in a quad screen. The amount of computation can be reduced by restoring the displayed image using the stored image restoration 113 function, and if the user wants to see the enlarged image on one screen instead of the divided screen, it is stored through the storage 121 function of the high quality processor 120. By reconstructing and displaying the high quality image by using the stored image restoration 123 function, the image can be viewed in high quality.

If you want to see the image input from the image generating device 20 from a remote location through a high-speed network, the dual codec image processing board 10 is a high-definition processing unit always in the low-quality image processing unit 110 as shown in FIG. In 120, a high quality image is always generated. When divided into a case of viewing a 4-split screen and a case of enlarging it into one screen through a high-speed network, an image processing board using a dual codec received input from the image generating apparatus 20 when viewed in a 4-split screen (10 ) Transmits the low quality image generated by the low quality processing unit 110 of the image processing unit 11 inputted from the image generating apparatus to a high speed network (112), and uses the image processing using another dual codec of a remote site connected to the high speed network. Received by the low quality processor 130 of the image processor 12 received from the board 10 and transmitted from a remote location (132) to show the real-time image transmitted to the low quality in four divisions. When the image is enlarged to one screen, the image input from the image generating apparatus 20 is transmitted to the high-speed network in a high quality image generated by the high quality processing unit 120 of the image processing unit 11 input from the image generating apparatus (122). And it is received from the image processing board 10 using another dual codec in the remote place and restored (142) in the high-definition processing unit 140 of the image processing unit 12 transmitted from the remote place to show the real-time image transmitted in high quality on one screen. .

That is, in the case of a 4-split screen, the 320x240x4 real-time images transmitted 112 are transmitted from the low quality processor 110 of the dual codec image processing board 10 and the image is enlarged instead of the dual codec image processing board 10. The real-time image of the 640x480 transmitted by the high-definition processing unit 120 of the (122). This keeps the network bandwidth equally stable because 320X240X4 = 640X480. Compared to the case of transmitting only in high quality, the network bandwidth should be reduced by 4 times (640X480X4) than the above method, which can overcome the increase of computational amount. Can complement

If the image processing board 10 using the dual codec than the transmission only in high quality, the network efficiency is 4 times better while maintaining the same image quality, and there is an effect of reducing the amount of computation at a remote location.

If it is difficult to transmit a high quality image in real time on a low speed network, the image processing board 10 using the duegong codec can see the effect of viewing in high quality. If you want to see the image input from the image generating device 20 remotely through a low-speed network, the image processing board 10 using the dual codec is always a low quality image in the low quality image processing unit 110 as shown in FIG. The high quality processor 120 always generates a high quality image. When divided into the case of viewing a 4-split screen through a low-speed network and the case of zooming into a single screen to explain the four-screen screen when the low-quality video is transmitted and restored in the same manner as shown in FIG. However, when zoomed in to one screen, it is difficult to transmit high quality real-time video due to the limitation of network bandwidth. To overcome this, the image input from the image generating apparatus 20 is first stored 121 of the high quality image generated by the high quality processor 120 of the image processing unit 11 input from the image generating apparatus and transmits the stored image. . The transmission is transmitted in a non-real time within the range allowed by the bandwidth, and the image transmitted to the remote is received from the image processing board 10 using another dual codec at the remote, and the high quality processor 140 of the image processor 12 is transmitted from the remote. ) To restore the image by using the remote image restoration function (143). In this case, because of the low speed network, all the stored high quality images cannot be transmitted, and the stored images are larger than the transmitted images. As a result, although there is a time delay, a high quality image can be viewed within a bandwidth allowable range. For example, if a user wants to see the camera of a remote location on a quad screen and wants to see the image of the camera of interest clearly and clearly, it generates a high-quality video command, saves it first, and transmits it afterwards so that the bandwidth of the network allows. You can receive the video from within. At this time, the video does not move naturally but stops and moves, but there is an advantage in that it is possible to view high-definition video at a high point in a slow network.

In this case, there may be a need to simultaneously view a real-time image. On the large screen 1431 using the PIP function as shown in FIG. 7, the remote image restoration function 143 of the high quality processing unit 140 of the image processing unit 12 transmitted from the remote location is transmitted to the high quality image stored at the remote location. In the small screen 1321, an image is displayed by using the reconstruction 132 function of the low quality processor 130 of the image processor 12 transmitted from a remote location. In this case, the large screen 1431 may experience a time delay, and the small screen 1321 may show a real time image. At this time, if a synchronization command is generated, an image having a time delay of the large screen 1431 is synchronized with a real-time image of the small screen 1321, and the image is displayed. At this point, the video is not shown as much as the time delay has occurred, but jumps and shows again from the point of synchronization. For example, if you watch a high-definition stored video from 10 o'clock, and the synchronization time is 11 o'clock, and the high-definition video is transmitted from 10:20, you can skip the video between 10:21 and 11 o'clock, To synchronize again. This feature is non-real time, but the advantage is that you can see in high quality.

As described above, the number of cameras is not only four but a plurality of effects can be seen, and the resolution of the high quality image is 640x480 or the resolution of the low resolution 320x240 is not limited to one example. It is also acceptable to adjust the resolution according to the bandwidth of the system.

In many cases, the video needs to be sent from a large number of users, due to the bandwidth limitations of the network. If this image is less necessary in real time, it is effective to use an image processing board 10 using a dual codec. That is, as shown in FIG. 8, a file in which the input from the image generating apparatus 20 is first stored in high quality (121) or a file previously stored in the device 30 capable of transmitting an image to a remote location is transmitted to the network, and After receiving the image from the image processing board 10 using another dual codec at a remote location and storing 121, the image is displayed using the stored file restoration 123 function. This method is highly effective when used in video education or advertising.

As described above, according to the image transmission system and the image processing method using the dual codec of the present invention, it is possible to display and search images transmitted from multiple regions using a limited bandwidth, and to receive and confirm a specific image in high quality when necessary. It works. You can also view remote video at the same time while viewing the stored video. As a result, multiple zones can be monitored simultaneously with limited bandwidth, thereby reducing installation and operating costs required to increase bandwidth, and using low-quality video modules, the system can be decorated with a CPU that performs less computation. It is effective to lower the unit price of In addition, the image display method after the file transfer can be smoothly operated even if the video education or advertising through the network.

Claims (3)

A high quality processor which processes an input image into a high resolution image and a low quality processor that processes an input image into a low resolution image are provided together. And the low quality processor generates a low quality image, and when it is requested to transmit multiple screens to the split screen at the same time, it transmits the low quality image of the low quality processor to reduce the amount of computation and network transmission, and displays one screen among multiple screens. And a dual codec, characterized in that it is configured to transmit a high definition image of the high definition image processing unit for the corresponding screen to effectively use the amount of computation and network bandwidth and maintain the image quality. It is equipped with an image processing board using a dual codec equipped with a high quality processing unit and a low quality processing unit, and if you want to see the split screen, a low quality image is transmitted from the image processing board using the dual codec to display an image in real time, In the case of confirming by expanding a specific image, the image processing board using the dual codec is configured to receive and display a high quality image generated and stored in the image processing board using the dual codec at a bandwidth allowed by the network. High quality image display method. The method of claim 2, When displaying a high-quality video, the PIP function is used to display a low-quality real-time video on a small screen to compensate for the weakness of time delay that occurs during the enlarged screen, and to skip the viewpoint of the high-quality video when a synchronization command is input. High-quality image display method using an image processing board using a dual codec, characterized in that to display in synchronization with the low quality image.

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