KR100952309B1 - High definition image broadcasting method and system of the same - Google Patents

Abstract

PURPOSE: A high definition image broadcasting method and a system thereof are provided to reduce data loss during a process which transmits HD image data. CONSTITUTION: A broadcasting transmitting module(200) partitions a HD(High Definition) image signal photographed by an image photographing device into a plurality of SD(Standard Definition) image signals. The broadcast transmitting module MPEG-encodes the SD image signals. A broadcast receiving module(600) MPEG-decodes the SD image signals. The broadcast receiving module combines the MPEG-decoded SD image signals. The broadcast receiving module restores the HD image signals.

Description

High Definition Image Broadcasting Method and System of the Same

The present invention relates to a high-definition (HD) video broadcasting technology, and more particularly, to divide and encode an HD video signal into a plurality of SD video signals, to transmit the data without loss of data, and to combine a plurality of MPEG decoded SD video signals. The present invention relates to a high quality video broadcasting method and system for outputting a restored HD video signal as an HD video.

Recently, due to the development of broadcasting and display technology, a method of transmitting data in an analog manner to a method of transmitting data in a digital manner has been changed. In particular, in a video display device such as a television, in order to overcome the limitations of image quality due to analog data transmission, inefficient channel utilization due to interference between adjacent channels, and limitation of unidirectional media, a desire for digital television is required. Is increasing.

Among the digital broadcasts, not only standard definition (SD) type broadcasts but also high definition (HD, High definition) type broadcasts having a high resolution have been popularized and are receiving great response from viewers. Also, with the spread of HD broadcasting, digital data is output for high-definition television (HDTV), high-definition video (HDV), high-definition multimedia interface (HDMI), high-definition DVD (HD-DVD), and high-definition video. Various displays such as a Blu-ray Disc that can be stored are commercially available.

Meanwhile, the broadcast transmission module compresses and converts HD video data into MPEG format through an MPEG encoder, and the broadcast reception module restores and displays HD video data through an MPEG decoder. .

However, since the HD video has a large size, data loss may occur in the process of compressing the HD video data, and the transmission speed of the HD video may be slow. In addition, the MPEG encoder or MPEG decoder in the form of a chip is difficult to supply and demand due to the lack of sales volume, and has become a very expensive transaction in reality.

Accordingly, the first technical problem to be achieved by the present invention is to reduce data loss and increase transmission speed in the process of transmitting HD video data.
In addition, the second technical problem of the present invention is to replace the MPEG encoder and MPEG decoder with one selected from MPEG 2 and MPEG 4 instead of using an expensive MPEG encoder and MPEG decoder to compress HD video signals. This is to output HD video signal to HD video at low cost.

The present invention for achieving the above object includes the following configuration.
That is, in the high-definition video broadcasting method according to the embodiment of the present invention, the broadcast transmission module divides the high-definition (HD) video signal photographed by the image photographing means into a plurality of standard definition (SD) video signals, and the plurality of SD. Performing MPEG encoding on each of the video signals and transmitting them externally; And a broadcast receiving module performs MPEG decoding on the plurality of SD video signals, combines the MPEG decoded SD video signals, restores the HD video signal, and outputs the restored HD video signal as HD video. And inputting a high-definition (HD) image signal captured by the image capturing means by an input unit, which is included in the broadcast transmission module. Modulating the HD video signal by a modulator; Dividing the HD video signal into a plurality of standard definition (SD) video signals by a first central processing unit; A plurality of MPEG encoders encode each of the plurality of SD image signals to a selected one of MPEG 2 or MPEG 4; And an output unit transmitting the MPEG-encoded plurality of SD image signals to a pre-connected network, wherein the plurality of SD image signals are configured in four, and the resolution size at which the four SD image signals are represented as an image is Receiving all of the plurality of SD video signals from the pre-connected network by a receiver, which is all the same as 640 * 360, and is provided in the broadcast receiving module; Synchronizing the plurality of SD image signals by delaying at least one of the plurality of SD image signals by a reception delay unit; A plurality of MPEG decoders for MPEG decoding the synchronized plurality of SD video signals into a selected one of MPEG 2 or MPEG 4; Reconstructing the plurality of MPEG decoded SD video signals into the digital HD video signal by a second central processing unit; Demodulating by analog demodulating the restored digital HD video signal; And processing a signal by the display unit to display the demodulated HD video signal on the instrumented video screen.
In addition, the high-definition video broadcasting system according to an embodiment of the present invention, divides the high-definition (HD) video signal photographed by the image capturing means into a plurality of standard definition (SD) video signals, each of the plurality of SD video signals A broadcast transmission module that encodes and encodes the MPEG; And a broadcast receiving module for MPEG decoding the plurality of SD video signals, performing a combination operation on the MPEG decoded SD video signals, restoring the HD video signal, and outputting the restored HD video signal as an HD video. The broadcast transmission module includes an input unit for receiving the HD video signal; A modulator for digitally modulating the HD video signal; A first central processing unit dividing the digital HD video signal generated by the modulator into a plurality of standard definition image signals; A plurality of MPEG encoders that match each of the plurality of SD image signals by 1: 1 to perform MPEG encoding with one selected from MPEG 2 or MPEG 4 to generate the same number of MPEG encoded SD image signals; And an output unit for transmitting the MPEG encoded plurality of SD image signals to a pre-connected network, wherein the broadcast receiving module comprises: a receiving unit for receiving the plurality of SD image signals from the pre-connected network; A reception side delay unit configured to delay at least one of the plurality of SD image signals to synchronize the plurality of SD image signals; A plurality of MPEG decoders for MPEG decoding the plurality of synchronized SD image signals with a selected one of MPEG 2 and MPEG 4; A second central processing unit which combines the MPEG decoded SD video signals and restores the digital HD video signal; A demodulator for analog demodulating the restored digital HD video signal; And a display unit configured to process the signal so that the demodulated HD video signal is displayed on the instrumented video screen.

The high-definition video broadcasting method and system thereof of the present invention have a first effect of reducing data loss and increasing a transmission speed in the process of transmitting an HD video signal.
In addition, the present invention can replace the MPEG encoder and MPEG decoder with one selected from MPEG 2 and MPEG 4 instead of using an expensive MPEG encoder and MPEG decoder to compress HD video signals. The second effect of outputting the signal as an HD image.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

First, a high definition (HD) video broadcasting system according to an embodiment of the present invention will be described with reference to FIG. 1. 1 is a schematic diagram of an HD video broadcasting system according to an embodiment of the present invention.
As shown in FIG. 1, the HD video broadcasting system according to the embodiment of the present invention includes a broadcast transmission module 200 and a plurality of broadcast reception modules 600 located in each home. In addition, the broadcast transmission module 200 and the plurality of broadcast reception modules 600 are connected to the network 500.

The broadcast transmission module 200 divides the HD video screen into a plurality of SD videos, and encodes the divided screens by MPEG encoding and transmits the divided screens to the broadcast receiving module 600 through the network 500.
The broadcast receiving module 600 may MPEG-decode the received SD video signal, restore the plurality of SD video screens to the first HD video, and output the restored HD video screen.

2 is a diagram illustrating a configuration of a broadcast transmission module according to an embodiment of the present invention. As shown in FIG. 2, the broadcast transmission module 200 according to the embodiment of the present invention includes an input unit 210, a modulator 220, a central processor 230, a first memory unit 235, and a first MPEG. An encoder 241, a second MPEG encoder 242, a third MPEG encoder 243, a fourth MPEG encoder 244, a delay unit 250, and an output unit 260 are included.

The input unit 210 receives a broadcast signal including an HD video signal, an audio signal, and a subtitle signal to be transmitted from a broadcasting station. In particular, the HD image includes an image captured directly or recorded through a high pixel camera.

In general, HD video has a size of 1280 * 720 or 1920 * 1080, and has a high screen resolution of about 2 million pixels.
In addition, the HD image has a resolution four times higher than that of the SD image, and has a scanning speed of 60 frames per second.
Here, since the HD image is large in size, it is mainly implemented by an interlaced scanning method, and the interlaced scanning method scans horizontal scanning lines constituting an image screen at one interval.
That is, when displaying an image screen, the first screen is a screen corresponding to the odd line scan line, the second screen is displayed so that the screen corresponding to the even line scan line crosses.

The modulator 220 modulates the analog HD video signal received from the input unit 210 into a digital form.
The data packet for the modulated HD video signal may include an Internet protocol (IP) header, a user datagram protocol (UDP) header, a routing table protocol (RTP) header, and the like. .
The internet protocol header includes an address generated by the central processing unit 230 assigning an internet address for network broadcasting.

The user datagram protocol header includes information for recombining the video signal transmitted from the broadcast transmission module 200 in the broadcast reception module 600.
The routing table protocol header sets a path of a virtual integrated network service (VINES) determined according to the number of communication network paths, and carries a data packet of a video signal to be delivered to the broadcast receiving module 600.

The central processor 230 divides the digitally modulated HD video signal into a plurality of areas corresponding to the SD video as shown in FIG. 3.

3 is a diagram illustrating a divided SD image screen according to an embodiment of the present invention.
The HD video screen is illustrated as 1280 * 720, and the four divided SD images D1, D2, D3, and D4 each have a resolution of 640 * 360.
The four divided SD images D1, D2, D3, and D4 can be set to different sizes. When divided into the same size as shown in FIG. 3, each SD image signal can be encoded by MPEG. You can save time.

As described above, when the central processing unit 230 divides the HD video screen into four SD videos D1, D2, D3, and D4, the divided four SD video signals are stored in the first memory unit 235, respectively. .

In general, an SD image has a size of 640 * 360 or 720 * 480, and has a screen resolution of about 400,000 pixels. Here, since the SD image is small in size, it is mainly implemented by a progressive scanning method.
The sequential scanning method does not display the odd-numbered and even-numbered scanning lines in the same way as the interlaced scanning method. Instead, the sequential scanning method displays all the scanning lines on one screen.

The plurality of MPEG encoders 241, 242, 243, and 244 read four SD image signals from the first memory unit 235 and encode the four SD image signals into MPEG codes.
In particular, according to an embodiment of the present invention, a plurality of MPEG encoders 241, 242, 243, and 244 perform MPEG encoding in an MPEG-2 scheme or an MPEG-4 scheme.
The MPEG-2 method is applied to multimedia services such as digital satellite broadcasting, digital cable broadcasting, SD broadcasting, HD broadcasting, and DVD video for television broadcasting. The MPEG-4 scheme is an extension of the MPEG-2 scheme and is applied to video / audio content, 3D content, low bit rate encoding, and digital rights management (DRM) services.

The plurality of MPEG encoders 241, 242, 243, and 244 transmit four MPEG encoded SD image signals to the output unit 260, and four SD image signals may not be simultaneously transmitted to the output unit 260. .

Accordingly, the delay unit 250 delays a part of the SD image signals input from the plurality of MPEG encoders 241, 242, 243, and 244 to synchronize the four SD image signals.
Here, the delay unit 250 may synchronize using a jitter buffer. That is, when the reception times of the data packets for the plurality of SD video signals are not the same, jitter may occur in which packets received later are not reproduced.
Therefore, when the jitter buffer is used, the jitter phenomenon can be prevented and the deterioration of the image quality can be prevented by delaying the reproduction of the first received data packet.
The delay unit 250 may transmit the transmission data to the output unit 260 simultaneously if the transmission data is received while waiting for a predetermined time by operating the Ack delay timer after receiving the data packet using the delayed ack algorithm. have.
In addition, the delay unit 250 may minimize packet loss through a packet loss processing algorithm.

The output unit 260 receives the video signals for the four SD images D1, D2, D3, and D4 from the delay unit 250, and outputs the received four SD image signals through the network 500.

4 is a diagram illustrating a configuration of a broadcast receiving module according to an embodiment of the present invention.
As shown in FIG. 4, the broadcast receiving module 600 according to the embodiment of the present invention includes a receiver 610, a delay unit 620, a first MPEG decoder 631, a second MPEG decoder 632, and a second receiver. The three MPEG decoder 633, the fourth MPEG decoder 634, the central processing unit 640, the second memory unit 650, the demodulator 660, and the display unit 670 are included.

The receiver 610 receives data on SD images D1, D2, D3, and D4 in an MPEG code state through the network 500, and the delay unit 620 delays a part of four SD image signals. Ensure that SD video signals are synchronized.

A plurality of MPEG decoders 631, 632, 633, and 634 decode the corresponding four SD video signals into a selected one of MPEG 2 and MPEG 4, respectively, to restore them to a state stored in the second memory unit 650. .

The central processing unit 640 combines four SD images D1, D2, D3, and D4 having a resolution of 640 * 360 to generate an HD image signal so that an HD image screen having a resolution of 1280 * 720 is realized.
The central processing unit 640 stores the HD video signal for the generated HD video screen in the second memory unit 650.
The demodulator 660 demodulates the HD video signal stored in the second memory unit 650 in an analog manner.
As the display unit 670 processes the demodulated HD video signal to be displayed on the instrumented video screen, the display unit 670 outputs the demodulated HD video signal to the HD video screen.

5 is a flowchart illustrating a high definition (HD) video broadcasting method according to an embodiment of the present invention.

Referring to FIG. 5, in the high-definition (HD) video broadcasting method of the present invention, an HD video signal is first input to the input unit 210 provided to the broadcast transmission module 200 (S510).
Here, the broadcast transmission module 200 includes an input unit 210, a modulator, a central processor, an MPEG encoder, a delay unit, and an output unit.
The modulator 220 modulates the analog video signal in a digital form (S520). The central processor 230 divides the digital HD video signal into four SD video signals D1, D2, D3, and D4 (S530).
Here, the central processing unit 230 sets an address in advance to divide the HD image into four according to the set address.
For example, if the HD video screen is set to be divided based on 640 * 360, it is divided into four SD videos according to the set address.

The plurality of MPEG encoders 241, 242, 243, and 244 read four SD video signals from the first memory unit 235 and encode the MPEG signals into one selected from MPEG 2 and MPEG 4 (S540).
The delay unit 250 delays some video signals so that four SD video signals can be transmitted simultaneously, thereby allowing a plurality of SD video signals to be synchronized (S550).

When the broadcast transmission module 200 transmits four SD video signals to the broadcast reception module 600 through a pre-connected network (S560), the plurality of MPEG decoders 631, 632 may be provided in the broadcast reception module 600. 633 and 634 MPEG-decode the corresponding four SD video signals with one selected from MPEG 2 and MPEG 4, respectively (S570).
At this time, the broadcast receiving module 600 receives four SD video signals through the instrumentation receiving unit 610, a plurality of MPEG decoders (631, 632, 633, 634) and the four SD video signals to MPEG 2 and Before MPEG decoding to one of MPEG 4 selected, the delay unit 620 of the broadcast receiving module 600 delays at least one of the four SD video signals to synchronize the four SD video signals.
The central processing unit 640 combines four SD images D1, D2, D3, and D4 to restore a digital HD image signal having an original size, and restores the restored digital HD image signal to the second memory unit 650. Temporary storage (S580).
The demodulator 660 of the broadcast receiving module 200 demodulates the digital HD video signal temporarily stored in the second memory unit 650 in an analog form (S590), and then reproduces the HD video by the digital HD video signal. The screen is output through the signal processing of the display unit 670 (S600).
Meanwhile, the MPEG encoders 241, 242, 243, and 244 and the MPEG decoders 631, 632, 633, and 634 according to an embodiment of the present invention encode an SD image to one selected from MPEG 2 and MPEG 4. And mpeg decoding, respectively, may be formed in a chip form.
The MPEG encoders 241, 242, 243, and 244 and the MPEG decoders 631, 632, 633, and 634 encode an HD video to MPEG 2 or MPEG 4, or MPEG-decode a plurality of SD videos. As a result, the price is one tenth of that of the existing MPEG encoder or MPEG decoder, which is very economical.

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In addition, according to an embodiment of the present invention by transmitting the HD video signal by dividing the four SD video signal, it is possible to reduce the data loss and increase the transmission speed in the process of transmitting the HD video signal, HD in a cost-effective manner Output video signal as HD video.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is a schematic diagram of an HD video broadcasting system according to an embodiment of the present invention.

2 is a diagram illustrating a configuration of a broadcast transmission module according to an embodiment of the present invention.

3 is a diagram illustrating a divided SD image screen according to an embodiment of the present invention.

4 is a diagram illustrating a configuration of a broadcast receiving module according to an embodiment of the present invention.

5 is a flowchart illustrating a method of broadcasting HD video according to an embodiment of the present invention.

Claims (8)

A broadcast transmission module dividing the high definition image signals captured by the image capturing means into a plurality of standard definition image signals, and encoding and encoding the plurality of SD image signals, respectively, for external transmission; And A broadcast receiving module performs MPEG decoding on the plurality of SD video signals, combines the MPEG decoded SD video signals, restores the HD video signal, and outputs the restored HD video signal as HD video. Including; Instrument cost in the broadcast transmission module, Inputting, by an input unit, a high definition (HD) image signal photographed by the image photographing means; Modulating the HD video signal by a modulator; Dividing the HD video signal into a plurality of standard definition (SD) video signals by a first central processing unit; A plurality of MPEG encoders encode each of the plurality of SD image signals to a selected one of MPEG 2 or MPEG 4; And An output unit transmitting the MPEG encoded SD video signals to a pre-connected network, The plurality of SD video signals are composed of four, and the resolution size that the four SD video signals are represented as an image is characterized in that all the same 640 * 360, Instrument cost in the broadcast receiving module, A receiver receiving the plurality of SD video signals from the connected network; Synchronizing the plurality of SD image signals by delaying at least one of the plurality of SD image signals by a reception delay unit; A plurality of MPEG decoders for MPEG decoding the synchronized plurality of SD video signals into a selected one of MPEG 2 or MPEG 4; Reconstructing the plurality of MPEG decoded SD video signals into the digital HD video signal by a second central processing unit; Demodulating by analog demodulating the restored digital HD video signal; And And displaying a signal by the display unit to display the demodulated HD image signal on the instrumented image screen. The method of claim 1, And at least one delay of the MPEG encoded multiple SD video signals, wherein the MPEG encoded multiple SD video signals are synchronized by a transmission side delay unit which is instrumented to the broadcast transmission module. High-definition video broadcasting. delete delete A broadcast transmission module for dividing a high definition (HD) image signal photographed by an image photographing unit into a plurality of standard definition (SD) image signals, and encoding and encoding the plurality of SD image signals, respectively, for external transmission; And And a broadcast receiving module for MPEG decoding the plurality of SD video signals, combining the MPEG decoded SD video signals, restoring the HD video signal, and outputting the restored HD video signal as HD video. , The broadcast transmission module, An input unit to receive the HD video signal; A modulator for digitally modulating the HD video signal; A first central processing unit dividing the digital HD video signal generated by the modulator into a plurality of standard definition image signals; A plurality of MPEG encoders that match each of the plurality of SD image signals by 1: 1 to perform MPEG encoding with one selected from MPEG 2 or MPEG 4 to generate the same number of MPEG encoded SD image signals; And And an output unit for transmitting the MPEG encoded SD video signals to a pre-connected network, wherein the broadcast receiving module includes: A receiver configured to receive the plurality of SD video signals from the connected network; A reception side delay unit configured to delay at least one of the plurality of SD image signals to synchronize the plurality of SD image signals; A plurality of MPEG decoders for MPEG decoding the plurality of synchronized SD image signals with a selected one of MPEG 2 and MPEG 4; A second central processing unit which combines the MPEG decoded SD video signals and restores the digital HD video signal; A demodulator for analog demodulating the restored digital HD video signal; And And a display unit configured to process the signal so that the demodulated HD video signal is displayed on an instrumented video screen. The method of claim 5, And a transmission side delay unit existing between the plurality of MPEG encoders and the output unit and delaying at least one of the MPEG encoded multiple SD video signals to synchronize the MPEG encoded multiple SD video signals. High Definition Video Broadcasting System. delete The method of claim 5, The plurality of SD video signals are composed of four, the high-definition video broadcasting system, characterized in that the resolution size of the four SD video signals are represented in the image is all the same 640 * 360.

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