KR101337222B1 - Portable broadcasting apparatus and remote broadcasting system using the same - Google Patents

Abstract

The present invention relates to a portable broadcasting device and a remote broadcasting system using the same capable of transceiving data packets through a network. The portable broadcasting device includes: an image input part (10) receiving an image signal from an image photographing device; a central processing part (30) generating image data from the image signal transmitted from the image input part (10); a streaming control part (40) encoding the image data into a streaming signal by receiving the data from the central processing part (30); an IP streaming output part (50) transmitting the streaming signal transmitted from the streaming control part (40) to a network (600); an IP streaming input part (60) receiving the streaming signal from the network (600); and an image output part (70) transmitting the image data to a display device (500) by receiving the data from the central processing part (30). The streaming control part (40) decodes the streaming signal transmitted from the IP streaming input part (60) in order to transmit it to the central processing part (30). According to this, the remote broadcasting system can be made by transmitting and receiving a photographed image only through the portable broadcasting device. [Reference numerals] (10) Image input part;(20) Sound input part;(200) Image photographing device;(30) Central processing part;(300) Sound input device;(40) Streaming control part;(400) Audio mixer;(50) IP streaming output part;(500) Display device;(60) IP streaming input part;(600) Network;(70) Image output part;(80) USB control port;(90) RS-232 control port

Description

Portable Broadcasting Device and Remote Broadcasting System Using It {PORTABLE BROADCASTING APPARATUS AND REMOTE BROADCASTING SYSTEM USING THE SAME}

The present invention relates to a portable broadcast device and a remote broadcast system using the same, and more particularly, to a portable broadcast device capable of transmitting and receiving data packets connected to a network and a remote broadcast system using the same.

A conventional broadcasting system installed in a public institution, a company or a school has a configuration in which a modulator receiving an input signal converts the RF signal into an RF demodulator. In general, RF signals are transmitted through coaxial cables. For example, schools do not have coaxial cables installed in non-standard classrooms such as auditoriums, multipurpose rooms, and special classrooms. In order to solve this problem, a coaxial cable must be additionally installed.

Patent Document 1 discloses a portable Internet live broadcasting device for solving the problems of the conventional broadcasting system. 1 is a flowchart illustrating the operation of a conventional portable internet live broadcasting apparatus. When video and audio data are input through an external camera and a microphone, the video is transmitted to the video controller 2 through the video distributor 1 and then closed. The generator 3 is transmitted to the video / sound compressor 5 through a predetermined subtitle insertion process, and the sound is processed by the sound controller 4 into a sound suitable for Internet broadcasting and transmitted to the video / sound compressor 5. The multimedia data compressed by the video / audio compressor 5 is transmitted to the network device 7 via the device controller 6 and then to the external internet.

However, the conventional portable Internet broadcasting apparatus has a function of simply transmitting image data to a network, and thus a computer must be used at the receiving side, and only one-way communication is possible, thereby making it impossible to perform two-way communication or multi-party communication.

KR 10-2005-0101075 A (October 20, 2005)

The present invention has been made to solve the above problems of the prior art, the problem to be solved in the present invention is a portable broadcasting device that can transmit and receive data packets without installing a separate coaxial cable using a network and bidirectional using the same It is to provide a remote broadcasting system capable of transmitting video.

According to an aspect of the present invention, there is provided a portable broadcast apparatus including: an image input unit configured to receive an image signal from an image photographing apparatus; A central processing unit for generating image data from the image signal transmitted from the image input unit; A streaming controller which receives the image data from the central processing unit and encodes the image data into a streaming signal; An IP streaming output unit transmitting the streaming signal transmitted from the streaming control unit to a network; An IP streaming input unit for receiving a streaming signal in the network and an image output unit for receiving the image data generated by the central processing unit and transmitting the image data to a display device, wherein the streaming control unit receives the streaming signal received from the IP streaming input unit. It is a technical feature of decoding and transmitting to the central processing unit.

Telecasting system according to the present invention includes a first portable broadcasting device according to the present invention; A second portable broadcasting device according to the present invention; A video image pickup device; And a display device and a network.

Since the portable broadcasting apparatus according to the present invention uses a pre-installed network, a separate coaxial cable is not required, and thus cost can be reduced, and a LAN cable can be installed and used in any place where a network is formed.

In addition, since only the portable broadcasting device according to the present invention can transmit and receive a captured image without a separate device, real-time remote live broadcasting is possible using the same.

1 is a flowchart of a conventional integrated portable Internet live broadcasting device
2 is a block diagram of a portable broadcasting device according to the present invention
Figure 3 is a block diagram showing the details of the central processing unit according to the present invention
4 is a block diagram showing details of a streaming control unit according to the present invention.
5 is a block diagram of a remote broadcasting system according to the present invention
6 is another configuration diagram of a remote broadcasting system according to the present invention.

Hereinafter, a portable broadcasting device and a remote broadcasting system using the same according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a portable broadcasting device according to the present invention.

The portable broadcasting apparatus 100 according to the present invention may include an audio input unit 10 that receives an image signal from the image capturing apparatus 200, an audio input unit 300, an audio input unit 300, or an audio mixer 400. 20, a central processing unit 30 for generating video data from the video signal and the audio signal transmitted from the video input unit 10 and the sound input unit 20, and receives the video data from the central processing unit 30 as a streaming signal The streaming control unit 40 for encoding, the IP streaming output unit 50 for transmitting the streaming signal transmitted from the streaming control unit 40 to the network 600, the IP streaming input unit 60 for receiving the streaming signal from the network 600 And a video output unit 70 that receives the video data from the central processing unit 30 and outputs the video data to the display device 500, and is connected to the central processing unit 30. 80, an RS-232 control port 90 connected to the central processing unit 30 may be further included. In addition, the portable broadcasting apparatus 100 according to the present invention may be configured to process and transmit and receive only an image signal by including the image input unit 10 without the sound input unit 20.

The portable broadcasting device 100 according to the present invention transmits a signal to a network in real time by photographing a video directly in the field such as a video lesson, a school conference, a school broadcast in a school, and receives a signal from the network and restores it to a high quality image. As a device capable of viewing, the image input unit 10 receives an analog image signal from the image capturing apparatus 200, converts the image into a digital image signal, and transmits the digital image signal to the central processing unit 30, and the sound input unit 20 receives the audio input device ( 300 or an analog sound signal is received from the audio mixer 400 and converted to a digital sound signal and transmitted to the central processing unit 30. The central processing unit 30 generates video data from the received digital video signal and audio signal and transmits it to the streaming control unit 40. The streaming control unit 40 encodes the received video data into a streaming signal suitable for real-time network transmission and then transmits the received video data to the IP streaming output unit 50. The IP streaming output unit 50 transmits the streaming signal to the network 600. The IP streaming input unit 60 receives the streaming signal from the network 600 and transmits it to the streaming control unit 40. The received streaming signal is decoded into a digital signal by the streaming controller 40 and transmitted to the central processing unit 30 for transmission to the display apparatus 500 or a device capable of receiving an HD digital signal. The central processing unit 30 decodes the received signal into a signal suitable for broadcast output and transmits the decoded signal to the image output unit 70. The image reached to the image output unit 70 is transmitted to the display device 500 such as a TV.

The image input unit 10 is a component that receives an image signal from the outside and provides a digital image signal to the central processing unit 30 and is connected to an image photographing apparatus 200 such as an HD camera. The connection with the image photographing apparatus 200 is made by, for example, an HDMI terminal which is a digital terminal, a component terminal which is an analog terminal, or the like. If the image capturing apparatus 200 is an SD camera, the composite terminal may further include a composite terminal. The image input unit 10 converts the image signal captured by the image capturing apparatus 200 to a digital signal when the analog signal is analog, and transmits the converted digital signal to the central processing unit 30. .

The sound input unit 20 is a component that receives a sound signal from the outside and provides a digital sound signal to the central processing unit 30. The sound input unit 20 includes a composite terminal for connecting to the sound input device 300 or the audio mixer 400. can do. When the audio input unit 20 receives an analog sound signal from the sound input device 300 or the audio mixer 400, the sound input unit 20 converts the analog sound signal into a digital sound signal and transmits the digital sound signal to the central processing unit 30. Transfer to 30.

3 is a configuration diagram showing the details of the central processing unit 30 according to the present invention. The central processing unit 30 compresses the digital signals received from the image input unit 10 and the sound input unit 20 and controls the operation of the portable broadcasting apparatus 100. The central processing unit 32 and the encoder 34 and the decoder 36 are configured.

The central processing unit 32 is a component for controlling the operation of the portable broadcasting apparatus 100 according to the present invention. Real-time Transport Protocol (RTP) is a protocol for transmitting real-time data such as sound and image data over multicast or unicast, and it is common to use RTP for real-time broadcasting. Meanwhile, RTCP (RTP Control Protocol) is a protocol for controlling RTP. In order to effectively transmit the RTCP for real-time broadcasting, the central processing unit 32 selects a unicast method if there is only one place to broadcast, and selects a multicast method if there are several places in the network. Is transmitted periodically and quality of service (QoS) monitoring is performed from the feedback data. You can also choose the broadcast method for transmission to the Internet.

In addition, the central processing unit 32 instructs the encoder 34 to encode the source when the signal transmitted to the central processing unit 30 is transmitted from the image input unit 10 or the audio input unit 20, and from the streaming control unit 40. If so, instruct the decoder 36 to source decode.

In addition, the decoder 36 transmits the source-decoded video or sound data to the video output unit 70.

The encoder 34 is a component that compresses (encodes) the original video and audio data having a large input capacity into a small amount of data using a standardized method, and has various standard methods for processing video and audio data. There is a technique to compress. Typical image compression techniques include MPEG-1 / 2/4, H.261 / 262/263, and H.264, the most recently standardized H.264 of which is up to 2 compared to MPEG-2 image compression technology. It is a high performance compression standard that can provide more than twice the compression efficiency, and can provide digital TV-quality high-quality video at a bit rate of 2Mbps or less, so that it can be used for video streaming over a network, portable multimedia broadcasting such as DMB, and network-based IPTV. It is used in multimedia applications. The H.264 video codec supports advanced computational functions such as 4x4 block-based operations and quarter-pixel motion prediction operations that are not supported by the existing video codecs for more efficient data processing. As a result, the H.264 video codec exhibits an excellent compression ratio compared to previous video codecs, with 39%, 49%, and 64% bit rate reductions, respectively, compared to the existing video codecs MPEG-4, H.263, and MPEG-2. . In the present invention, the encoder 34 is based on compression by the H.264 video codec, which has the highest compression rate and is generally used, but for compatibility with other devices, MPEG-1 / 2/4 and H.261 / 262 / Standards such as 263 enable source encoding and source decoding.

Techniques for compressing sound signals include MPEG-1, MPEG-2, MPEG Layer 3 (MP3), MPEG-4 AAC, etc. The MPEG-1 and MPEG-2 standards are used for digital audio broadcasting (DAB) and MPEG Layer 3 ( MP3) is used for music file compression, and MPEG-4 AAC is used for digital TV (DTV) and DMB. In the present invention, the encoder 34 is based on the MPEG-4 AAC method suitable for HDTV output. However, the encoder 34 may also compress the MPEG-1, 2, and MPEG Layer 3 (MP3) codecs for compatibility with other devices. .

The decoder 36 is a component for source decoding a signal received from the streaming controller 40. The decoder 36 is source decoded to be output from the display apparatus 500 such as a TV and transmitted to the image output unit 70. To be possible.

4 is a block diagram showing details of the streaming control unit according to the present invention. The streaming controller 40 is a component for channel encoding by receiving the compressed video codec and the audio codec from the central processing unit 30 or receiving the streaming signal from the IP streaming input unit 60, and decoding the channel. And a streaming decoder 44.

Streaming technique is a technique that reproduces video or sound in real time. The client side receiving data continuously collects the data, processes the data, and sends the data to an application program that converts the data into sound or image. The streaming technique uses a buffer that can store and temporarily store information when sending and receiving data between the main memory of the receiving device and peripheral devices, so there is no need to wait for the download to complete. Larger materials, like materials, can be viewed without restrictions. There are several standardized techniques for streaming techniques, such as the MPEG series streaming technique.

The MPEG system is a standard for transmitting or storing the MPEG video bit stream and the MPEG audio bit stream. When multiplexing into one bit string as described above, it is necessary to have a format suitable for a protocol or a storage format of a communication channel, a storage medium, or the like, and such a system includes an MPEG-1 system and an MPEG-2 system. The MPEG-1 system multiplexes a single program in an error-free channel environment and is therefore used for a relatively narrow range of applications such as video CDs. In comparison, the MPEG-2 system is compatible with a wide range of applications such as broadcasting, communication, and storage media, and its format is much more complicated.

There are two types of MPEG-2 systems. One is called the program stream, which multiplexes a single program in an error-free channel environment. The other is a transport stream, which multiplexes a plurality of programs in an error channel environment. Since multiple programs are multiplexed into one bit string, it is suitable for digital TV broadcasting in the multimedia era and a scramble function for limited reception can be added. The scramble function encrypts a bit string so that only the paying subscriber can watch it.

The streaming control unit 40 basically uses an MPEG-2 transport stream suitable for digital TV broadcasting and the like. However, MPEG-1 program streams may be used as needed.

The streaming encoder 42 is a component for channel encoding the compressed video signal received from the central processing unit 30. The encoded data is divided into packets of a predetermined unit to enable real-time broadcasting at the receiving end, and the information of the frame is included in each packet. Attached with a header is transmitted to the network via the IP streaming output unit 50.

The streaming decoder 44 is a component for channel decoding the stream signal received from the network 600 through the IP streaming input unit 60. The streaming decoder 44 reads information from the header of the packet received from the IP streaming input unit 60 and arranges them in order. Then, the channel is decoded into a signal that can be processed by the central processing unit 30 and transmitted to the central processing unit 30.

The IP streaming output unit 50 is a component connected to the streaming control unit 40, and has a terminal for connecting to a LAN cable, so that the streaming signal received from the streaming control unit 40 is transferred to the network 600 through the connected LAN cable. Send.

The IP streaming input unit 60 is a component connected to the streaming control unit 40 and has a terminal for connecting to a LAN cable. Since one LAN cable can transmit and receive data, the terminal of the IP streaming output unit 50 can also serve as the terminal of the IP streaming input unit 60. The IP streaming input unit 60 receives the streaming signal on the network 600 and transmits it to the streaming control unit 40.

In this case, the IP streaming output unit 50 or the IP streaming input unit 60 may be provided in plural numbers, and the portable broadcasting apparatus according to the present invention may serve as a broadcasting hub for connecting a plurality of LANs.

The image output unit 70 is a component connected to the central processing unit 30 and has a terminal for connecting to a display device such as an HD TV. For example, an HDMI terminal, a component terminal, and the like are provided. The image output unit 70 receives the compressed image signal or the audio signal from the central processing unit 30 and transmits it to a display device 500 such as a TV. The image output unit 70 further includes a D / A converter. Even the display apparatus 500 that can receive only the video can be viewed.

The USB control port 80 is a component connected to the central processing unit 30, and is compatible with a system introduced in the future by upgrading firmware that can improve the performance of the portable broadcasting apparatus 100 through the USB control port 80. Can be increased.

The RS-232 control port 90 is a component connected to the central processing unit 30, and connects the portable broadcasting device 100 according to the present invention with an external controller such as a computer to set internal settings of the portable broadcasting device 100. Allows modification or control of the portable broadcast device 100.

By using a plurality of portable broadcasting apparatuses 100 according to the present invention, a network may be used in a company, a public institution, a school or the like to enable real-time broadcasting even in a space where a coaxial cable is not installed.

For example, if there is a special lecture in a classroom of a school, the image is taken by a camera, a camcorder, etc. in the classroom and sent to the network 600 in real time through the portable broadcasting device 100, and all classrooms connected to the network 600 In the portable broadcasting device 110 to receive an image in real time it is possible to watch on TV.

5 illustrates a remote broadcasting system using a portable broadcasting device according to the present invention. In the remote broadcasting system according to the present invention, an image capturing apparatus 200 which captures an image at a photographing location, a transmitting portable broadcasting apparatus 100 receiving a signal from the image capturing apparatus, and a network receiving a signal from the portable broadcasting apparatus 100 600, a receiver portable broadcast apparatus 110 receiving a signal from a network, and a display apparatus 500 receiving a signal from the receiver portable broadcast apparatus 110. There may be a plurality of reception side portable broadcasting devices 110. The image capturing apparatus 200 is connected to the transmitting portable broadcasting apparatus 100, and the transmitting portable broadcasting apparatus 100 is connected to the network 600 to transmit an image signal to the network 600. The receiving portable broadcasting apparatus 110 receives an image signal from the connected network 600, and the display apparatus 500 connected to the receiving portable broadcasting apparatus 110 outputs the received image signal.

The remote broadcasting system according to the present invention may further include a sound input device 300 or an audio mixer 400. The sound input device 300 is connected to the audio mixer 400, and the audio mixer 400 is connected to the portable broadcast device 100. The sound input device 300 records sound from a photographing location and transmits the sound to the audio mixer 400. The audio mixer 400 processes the received sound signal appropriately for broadcasting and transmits the sound signal to the transmitting portable broadcast apparatus 100. The audio mixer 400 may be omitted, and the audio input apparatus 300 may be configured to directly connect the transmitting portable broadcast apparatus 100.

6 shows another remote broadcasting system according to the present invention. As shown in FIG. 6, when the image capturing apparatus 200, such as a camera, is connected to the reception-side portable broadcasting apparatus 110 and used for transmission, two-way communication or multi-party communication is possible, and thus it may be utilized for video conferencing purposes. In the configuration of FIG. 6, a sound input device or an audio mixer may be connected to the transmitting portable broadcast apparatus 100 and the receiving portable broadcast apparatus 110 in the configuration of FIG. 6.

For example, an image is taken in a conference room of a company, and the image is transmitted in real time to a connected company network using the portable broadcasting device according to the present invention, and then each office uses the other portable broadcasting device according to the present invention. Remote live broadcasting is possible because video can be received from a network and viewed on a display device such as a TV. In addition, in each office, video taken using a video recording device such as a camera is transmitted to the network through a portable broadcasting device according to the present invention, and when received in another office or a meeting room, two-way communication or multi-party communication is enabled. It is also possible.

10: image input unit 20: sound input unit
30: central processing unit 40: streaming control unit
50: IP streaming output unit 60: IP streaming input unit
70: video output unit 80: USB control port
90: RS-232 control port 100: portable broadcasting device
110: second portable broadcast device 200: video recording device
300: sound input device 400: audio mixer
500: display device 600: network

Claims (10)

An image input unit 10 receiving an image signal from an image photographing apparatus;
A central processing unit 30 for generating image data from the image signal transmitted from the image input unit 10;
A streaming controller 40 receiving image data from the central processing unit 30 and encoding the image data into a streaming signal;
An IP streaming output unit 50 for transmitting the streaming signal transmitted from the streaming control unit 40 to the network 600;
An IP streaming input unit 60 for receiving a streaming signal from the network 600; And
And an image output unit 70 receiving the image data generated by the central processing unit 30 and transmitting the image data to the display apparatus 500.
In the portable broadcasting device, the streaming control unit 40 decodes the streaming signal received from the IP streaming input unit 60 and transmits the decoded signal to the central processing unit 30.
The central processing unit 30 includes an encoder 34 for source encoding the video signal transmitted from the video input unit 10, a decoder 36 for source decoding the signal received from the streaming control unit 40, and the central processing unit ( 30, if the signal transmitted from the video input unit 10 is transmitted, the encoder 34 instructs the source to be transmitted to the streaming control unit 40, and if the signal is transmitted from the streaming control unit 40, the decoder ( And a central processing unit 32 for commanding source decoding at 36 and transmitting the same to the image output unit 70.
The streaming control unit 40 channel-encodes the image data received from the central processing unit 30 to the IP streaming output unit 50 and the streaming encoder 42 and the IP streaming input unit 60 through the network And a streaming decoder (44) for channel decoding the streaming signal received from (600) and transmitting it to the central processing unit (30).
delete The method according to claim 1,
Portable broadcast device further comprises a USB control port (80) for the firmware upgrade.
The method according to claim 1,
And an RS-232 control port (90) for allowing an external device to modify internal settings of the portable broadcast device (100) or to control the portable broadcast device (100).
delete delete An image capturing apparatus 200 for capturing an image;
A first portable broadcasting device (100) according to any one of claims 1, 3, and 4, which receives a video signal from the image photographing device (200);
A network 600 receiving a signal from the first portable broadcasting device 100;
A second portable broadcasting device (110) according to any one of claims 1, 3 or 4 which receives a signal from the network (600);
And a display apparatus (500) for receiving and outputting a signal from the second portable broadcasting apparatus (110).
The method of claim 7,
The display apparatus 500 receives and outputs a signal from the first portable broadcasting apparatus 100, and a remote image including a video photographing apparatus 200 that provides an image signal to the second portable broadcasting apparatus 110. Broadcasting system.
delete delete

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