KR100742160B1 - Overlapping transmission method for dmb pad broadcasting - Google Patents

Abstract

The present invention converts the terrestrial DMB PAD broadcast from the conventional sequential circulation method to the overwrite transmission method, thereby enabling a terrestrial DMB (DMB) capable of implementing a linked data broadcast and a live broadcast data broadcast that can export a picture in conjunction with the content currently being broadcast. The present invention relates to a method of overwriting transmission in PAD broadcasting.

According to the present invention, the video signal is converted into a text image signal through the video switcher 10 and the character generator 11 for transmission, and then supplied from the data automatic transmission system 12 to the DMB PAD transmission system 22. PAD data of the DMB PAD transmission system 22 is a picture suitable for the broadcast content to be used during a program time organized to be transmitted to the terrestrial DMB data transmission system in a traffic broadcasting PAD system that is transmitted as digital data through an encoder 34. Selects data and BWS data, and sends the selected data to a transmission folder of a terrestrial DMB data system, and sends the data according to a DMB transmission protocol such as a cyclic scheduling time and a data length; It is not limited to the circulation cycle by using the circular knitting time, and the number of pictures to be sent and the BWS data is limited to one, so 320x240 size pictures and less than 3K bytes of BWS data are selected and sent to the DMB PAD transmission system. ; The picture and BWS data transmitted to the DMB PAD delivery system are transferred to a PAD inserter in the DMB PAD delivery system, converted into a DMB transmission protocol, and moved to a delivery folder of the DMB PAD delivery system; The receiver keeps showing the incoming data on the screen, so new data continues to appear, so that the data is sent out in advance in consideration of the 15-second delay required for encoding and transmission.

Terrestrial DMB, PAD, Overwrite Transmission Method, DMB, PAD

Description

OVERLAPPING TRANSMISSION METHOD FOR DMB PAD BROADCASTING}

1 is a block diagram of a traffic broadcasting PAD system to which an overwrite transmission method is applied in terrestrial DMB (PAD) broadcasting according to an embodiment of the present invention;

2 is a flowchart illustrating an overwrite transmission method in terrestrial DMB (PAD) broadcasting according to the present invention;

3 is a flowchart illustrating a conventional sequential circulation method.

※ Explanation of code about main part of drawing ※

10: video switcher 11: character generator for transmission

12: automatic data transmission system 20: broadcasting data database system

21: Character generator for editing 22: PAD transmission system

33: Audio Changer 34: Encoder

36: ensemble 37: transmitter

The present invention converts the terrestrial DMB PAD broadcast from the conventional sequential circulation method to the overwrite transmission method, thereby enabling a terrestrial DMB (DMB) capable of implementing a linked data broadcast and a live broadcast data broadcast that can export a picture in conjunction with the content currently being broadcast. The present invention relates to a method of overwriting transmission in PAD broadcasting.

The shift to digital multimedia broadcasting (DMB), which enables additional data services including high-quality audio and video, is being made more rapidly than existing analog radio broadcasting, which provided only a simple audio service. In response to this trend, as broadcast services are being attempted worldwide as a multimedia broadcasting service for watching and listening to the European terrestrial digital audio broadcasting (DAB) based on EUREKA-147, research for improving the reception performance is very urgently required. there was.

The broadcast service may be classified into a fixed reception service, a portable reception service, and a mobile reception service according to a reception environment. Recently, with the explosive demand and growth of mobile communication service, the mobile reception service for multimedia broadcasting and data broadcasting is expected to be greatly spread in the future. Therefore, mobile reception service for video such as TV broadcasting, that is, digital multimedia broadcasting (DMB), is being planned using terrestrial and satellite digital audio broadcasting (DAB) platforms. Research is ongoing.

The digital multimedia broadcasting is a broadcasting service that provides various multimedia signals such as voice and video to a digitally modulated, fixed or portable receiver for a vehicle. In addition, terrestrial digital multimedia broadcasting using a transmission tower consists of 10 videos and 20 audio data, and satellite digital multimedia broadcasting consists of 11 videos and 30 audio data, which are transmitted to mobile phones, vehicles, and dedicated terminals, respectively.

The satellite DMB uses a satellite, and when a program is transmitted to the satellite by the satellite DMB broadcasting center, the satellite spreads it to DMB terminals throughout the country. The terrestrial DMB transmits a program using a frequency in the ground, and unlike a satellite DMB, a broadcast signal is transmitted through a base station on the ground.

Accordingly, the wireless communication network for providing DMB service is to extend the Asynchronous Transfer Mode (ATM) technology of the broadband integrated information communication network to the wireless area, which is used to provide high quality voice, video and video, and Internet access in the wireless section. Users who provide services can access B-ISDN (BROADBAND-INTEGRATED SERVICE DIGITAL NETWORKS) via a wireless ATM network. Therefore, the mobile user is guaranteed the end-to-end service quality and is provided with the same service as the wired network user. In addition, the wireless ATM network is interworking with the existing mobile communication network, personal mobile communication network, local network, and the like to accommodate the services, it is developing into a wired / wireless integrated network through this ATM technology.

In the wireless environment, unlike the wired environment, the characteristics of the channel are changed by the surrounding environment of time and space, and mutual interference occurs because a plurality of users share limited wireless resources. In particular, in the wireless ATM network requiring broadband transmission rate, the frequency of use is increased from 5.2 GHz to 60 GHz, resulting in many changes in channel characteristics and corresponding technologies. This requires a modem technique, an encoding technique, an error control scheme, etc. to provide a reliable link between the base station and the terminal.

In addition, the band management schemes incorporating various services of fixed rate, variable rate, available rate, and unfixed rate are allocated according to user's needs in consideration of bandwidth efficiency and service quality guarantee. This is implemented according to the characteristics of time division multiple access and code division multiple access. Therefore, in addition to the issues of the wireless ATM network supporting broadband multimedia services to subscribers moving to poor wireless environment has a multipath loss.

On the other hand, terrestrial DMB PAD broadcasting is currently composed of DLS (Dedicate Landing Site) service, slide show service, and broadcasting web service (BWS). The DLS is a form of DMB broadcasting that transmits about 120 bytes of text as data, and the slideshow sends photograph data and broadcasting web service (BWS) data sequentially and cyclically for a predetermined time to a data area other than voice. It is a form of DMB broadcasting, and the broadcasting web service (BWS) is a form of DMB broadcasting sending data in a homepage format. It can be used as a DAB broadcast instead of the DMB.

3 is a flowchart illustrating a conventional sequential circulation method. In the conventional transmission method, the sequential circulation method transmits a certain amount of data in a sequential circulation method for a predetermined time for a DLS and a slide show (photograph, BWS, etc.). Photo data and BWS data suitable for the broadcast content to be used during the program time organized to be transmitted to the terrestrial DMB data transmission system are selected. The selected data is sent to the transmission folder of the terrestrial DMB data system, and the transmitted data are transmitted according to the DMB transmission protocol such as cyclic scheduling time and data length.

In this case, if the cyclical scheduling time is 1 hour and the prepared data is 20 pictures and BWS data, the transmission system transmits 20 pictures data and broadcast web service (BWS) sequentially for 1 hour regardless of the broadcast contents. If you select Unlimited for the rotation schedule time, 20 photos and BWS data are continuously sent out from the DMB delivery system without content conversion.

If you have sent all 20, send the photos again and again from the beginning. The photo and BWS data transmitted to the DMB transmission system are transferred to a PAD inserter of the DMB transmission system, converted into a DMB transmission protocol, and moved to a transmission folder of the DMB transmission system. The transmitted data thus transferred are transmitted to the transmitter by the PAD transmission system.

Therefore, when a predetermined circular knitting time of 1 hour has elapsed, the photograph is selected and sent out again through the above process. Therefore, the sequential circulation method of the conventional transmission method has a problem in that it cannot exactly match the broadcast content, the picture to be transmitted and the content of the broadcast web service (BWS).

Accordingly, the present invention has been invented to solve the problems of the conventional sequential circulation method as described above, and the contents of the broadcast are continued by overwriting data to be broadcast by randomly importing the data generated and transmitted by the DMB transmission system. It is an object of the present invention to provide a method of overwriting transmission in terrestrial DMB (PAD) broadcasting, which can realize a rapidly changing broadcasting data broadcasting production environment.

Another object of the present invention is to overwrite in terrestrial DMB (PAD) broadcasting, which can realize linked, impromptu data broadcasting by processing, creating and transmitting data generated in the existing DMB transmission system into new data. A delivery method can be provided.

According to the present invention for achieving the above object, the image signal is converted into a character image signal through the video switcher 10 and the character generator 11 for transmission, and then from the data automatic transmission system 12 to the DMB PAD transmission system 22. In the traffic broadcasting PAD system which is supplied and the PAD data of this DMB PAD transmission system 22 is transmitted as digital data through the encoder 34, the broadcast to be used during the program time organized to be transmitted to the terrestrial DMB data transmission system. Selecting picture data and BWS data suitable for the content, and the selected data are sent to the transmission folder of the terrestrial DMB data system, and the transmitted data are transmitted according to the DMB transmission protocol such as cyclical scheduling time and data length; It is not limited to the circulation cycle by using the circular knitting time, and the number of photos and BWS data to be sent is limited to one, so 320x240 size photos and BWS data of less than 3K bytes are selected and sent to the DMB PAD transmission system. ; The picture and BWS data transmitted to the DMB PAD delivery system are transferred to a PAD inserter in the DMB PAD delivery system, converted into a DMB transmission protocol, and moved to a delivery folder of the DMB PAD delivery system; The receiver keeps showing the incoming data on the screen, so new data continues to appear, so that the data is sent out in advance in consideration of the 15-second delay required for encoding and transmission.

According to another specific embodiment of the present invention, a video signal is converted into a text image signal through a video switcher and a transmission character generator, and then supplied from the automatic data transmission system to the DMB PAD transmission system, and the PAD data of the DMB PAD transmission system is In traffic broadcasting PAD system, which is transmitted as digital data through encoder, the video signal prepared for broadcasting is input to the character generator through the video switcher, and the automatic data transmission system is the character and picture to be synthesized into the video signal by the character generator. Transmits; The picture and text transmitted on the video signal pre-appointed to the prepared video signal are automatically synthesized by using the automatic transmission function of the character generator, and the automatic transmission function of the character generator enables the video and character synthesis. Is mounted; The text image signal to be synthesized is the output of the character generator, and the video output of the synthesized character generator is put into the input of the video encoder from the data transmission system, and the signal input to the data transmission system and the video encoder is one. Captures a picture at 320x240 in size; After passing through the above process, the contents of the PAD data transmission system is completed by overwriting the contents of the file to be transmitted.

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

1 is a block diagram of a traffic broadcasting PAD system to which an overwrite transmission method in a terrestrial DMB (PAD) broadcasting according to an embodiment of the present invention is applied, and includes a plurality of surveillance cameras (CCTV # 1-CCTV #). The video signal transmitted from N) is supplied to the video switcher 10 and then supplied to the character generator 11 for transmission, and the character image signal is output from the character generator 11 for transmission to output the data automatically. Is supplied. The automatic data transmission system 12 sends control signals to a plurality of surveillance cameras (CCTV # 1-CCTV # N), video switcher 10, and character generator 11 for transmission, respectively. It is configured to be connected to the broadcast data database system 20, the text generator 21 for editing, and the DMB PAD transmission system 22, which is an inserter system. Therefore, the captured picture of the text image output from the data automatic transmission system 12 is supplied to the DMB PAD transmission system 22.

On the other hand, the audio signal is supplied from the audio file main unit 30 to the auto changer 33 as AES (AUDIO ENGINEERING SOCIETY) / EBU (EUROPEAN BROADCASTING UNION), and the auto changer 33 is input to a separate audio file. The subunit 31 and the DVD backup unit 32 are connected to each other. Accordingly, the auto changer 33 is supplied with an AES / EBU to the encoder 34 as an output signal, and the encoder 34 is a mass-produced PAD from the DMB PAD delivery system 22 described above. Data is being supplied.

The encoder 34 receiving AES / EBU and mass-produced PAD data outputs digital data, and this digital data is output through the S multiplexer 35, so that a dedicated line (E1 LINE × 2) is separately provided. Is connected, and is transmitted from the transmitter 37 via an ensemble 36.

The traffic broadcasting PAD broadcast configured as described above collects real-time traffic information generated by accessing a traffic broadcasting database through a network. The video information data is separated from the collected traffic information to operate the surveillance camera (CCTV). From this, it is supplied to the character generator 11 for transmission through the video switcher 10.

Image and text are sent to the character generator 11 to synthesize image information. If necessary data is also synthesized from the schedule data. Accordingly, the real-time traffic picture and the corresponding data are transmitted in the form of a video data signal synthesized through the automatic data transmission system 12 and the PAD transmission system 22 by overwriting the 320x240 picture data by the video encoder 34. It is configured to do so.

2 is a flowchart illustrating an overwrite transmission method in terrestrial DMB (PAD) broadcasting according to the present invention. The overwrite transmission method of the present invention is similar to the conventional sequential transmission method. A slide show (picture, BWS, etc.) is sent out in a sequential fashion for a certain amount of time. Photo data and BWS data suitable for the broadcast content to be used during the program time organized to be transmitted to the terrestrial DMB data transmission system are selected. The selected data is sent to the transmission folder of the terrestrial DMB data system, and the sent data are transmitted according to the DMB transmission protocol such as cyclic scheduling time and data length.

In the next process, the circulation formation time is set to unlimited, and the circulation cycle is not limited, and the number of outgoing photos and BWS data is limited to one. Select 320x240 photos and BWS data of less than 3K bytes to be sent to the DMB PAD delivery system.

The photo and BWS data transmitted to the DMB PAD transmission system are transferred to the PAD inserter among the DMB PAD transmission system, and are converted to the DMB transmission protocol to be moved to the transmission folder of the DMB PAD transmission system. At this time, DMB PAD broadcast protocol calls up the data that is created on the DMB PAD broadcasting Internet and sends the same file name to overwrite the existing data and transfers it to the play folder of the DMB PAD broadcasting system.

In this case, the DMB and DAB receivers will continue to display the data being sent, so new data will continue to appear. In this way, if the data is transmitted in advance in consideration of the 15 second delay time required for encoding and transmission, the broadcast content can be accurately matched.

The overwriting method of the present invention implemented as described above may implement linked data broadcasting by intermittently sending the designated data at a specified time. In addition, the overwriting method of the present invention can implement a live broadcast data broadcasting production environment in which the broadcast contents are continuously changed by overwriting data to be broadcast by randomly importing the data generated and transmitted by the DMB PAD transmission system.

Therefore, although the conventional cyclic sequential method is configured to transmit data using the data generated in the existing DMB transmission system as it is, the overwrite method of the present invention processes and creates the data generated in the existing DMB transmission system into new data. By transmitting, it is configured to realize linked and impromptu data broadcasting.

The present invention configured as described above can also be used as a system for producing a large amount of pictures required for the PAD, which prepares a video signal to be used for broadcasting, and the video signal prepared from the surveillance camera to the character generator through the video switcher Put as input.

The automatic data transmission system transmits pictures and texts to be synthesized in the video signal to the text generator. Then, the image and characters transmitted on the video signal previously promised to the prepared video signal are automatically synthesized by using the automatic transmission function of the character generator. The automatic transmission function of the character generator is equipped with a unique function that allows video and character composition.

The synthesized character image signal is outputted from the character generator, and the video output of the synthesized character generator is put into the input of the video encoder from the data transmission system. Therefore, the signal inputted to the automatic data transmission system and the video encoder can capture a picture according to the size of 320x240 as one picture.

Therefore, there is an advantage that can be sent by overwriting the contents of the complete file to be transmitted after the above process PAD data transmission system.

On the other hand, in order to add an automatic storage function in the automatic transmission system, a video signal is given to a character generator, and the image generator sends a picture and character information to the automatic transmission system to synthesize the picture and character information on the video signal. To the input of the video encoder. The video encoder may generate and store a large-scale captured picture by adjusting the size and compression ratio of the input video signal.

As described above, according to the present invention, a terrestrial DMB capable of realizing a live broadcast data broadcasting production environment in which broadcast contents are continuously changed by overwriting data to be broadcast by randomly importing data generated and transmitted by the DMB transmission system. (DMB) It is possible to provide an overwrite transmission method in PAD broadcasting.

Although the technical concept of the overwrite transmission method in the terrestrial DMB (PAD) broadcasting of the present invention has been described with reference to the drawings, the present invention has been described by way of example only. It is not intended to limit the scope of the claims. It will be apparent to those skilled in the art that various modifications and imitations can be made without departing from the scope of the technical idea of the present invention.

Claims (4)

The video signal is converted into a text image signal through the video switcher and the character generator for transmission, and then supplied from the data automatic transmission system to the DMB PAD transmission system. The PAD data of the DMB PAD transmission system is transmitted as digital data through the encoder. In the traffic broadcasting PAD system, Photo data and BWS data suitable for the broadcast content to be used during the program time organized to be transmitted to the terrestrial DMB data transmission system are screened, and the selected data are sent to the transmission folder of the terrestrial DMB data system, and the transmitted data are cyclically organized time. Sending in accordance with a DMB sending protocol such as data length; It does not limit the circulation cycle by using the circular knitting time as unrestricted, and the number of photos and BWS data to be sent is limited to one, so 20x240 photo and BWS data of less than 3K bytes are selected and sent to the DMB PAD transmission system. ; The picture and BWS data transmitted to the DMB PAD delivery system are transferred to a PAD inserter in the DMB PAD delivery system, converted into a DMB transmission protocol, and moved to a delivery folder of the DMB PAD delivery system; The receiver continuously shows new data on the screen, so new data appears continuously, and in this way, when the data is transmitted in advance in consideration of the 15-second delay required for encoding and transmission, the terrestrial DMB (DMB) ) Overwrite transmission method in PAD broadcasting. delete The video signal is converted into a text image signal through the video switcher and the character generator for transmission, and then supplied from the data automatic transmission system to the DMB PAD transmission system. The PAD data of the DMB PAD transmission system is transmitted as digital data through the encoder. In the traffic broadcasting PAD system, A video signal prepared for broadcasting is input to a character generator through a video switcher and transmits pictures and characters to be synthesized into the video signal from the character generator to a data transmission system; The picture and text transmitted on the video signal pre-appointed to the prepared video signal are automatically synthesized by using the automatic transmission function of the character generator, and the automatic transmission function of the character generator enables the video and character synthesis. Is mounted; The synthesized character image signal is output from the character generator, and the video output of the synthesized character generator is put into the input of the video encoder from the data automatic transmission system and the DMB PAD transmission system, and the data automatic transmission system and the DMB PAD transmission system. The signal input to the video encoder from the device captures a picture at a size of 320x240 in one picture; The method of overwriting transmission in terrestrial DMB (PAD) broadcasting, characterized in that the PAD data transmission system overwrites the contents of the completed file to be transmitted. The method of claim 3, wherein Sending video output to the video encoder by sending picture and text information to the automatic transmission system to synthesize the picture and text information on the video signal, the video encoder adjusts the size and compression rate of the video signal. Method for overwriting transmission in terrestrial DMB (PAD) broadcasting, characterized in that to generate and store a large-scale standardized capture picture.

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