KR20150122435A - System of optical transmission for broadcast signal and method thereof - Google Patents

System of optical transmission for broadcast signal and method thereof Download PDF

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Publication number
KR20150122435A
KR20150122435A KR1020140048678A KR20140048678A KR20150122435A KR 20150122435 A KR20150122435 A KR 20150122435A KR 1020140048678 A KR1020140048678 A KR 1020140048678A KR 20140048678 A KR20140048678 A KR 20140048678A KR 20150122435 A KR20150122435 A KR 20150122435A
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KR
South Korea
Prior art keywords
signal
ethernet
broadcast
broadcast signal
optical
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KR1020140048678A
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Korean (ko)
Inventor
조진기
이창희
김원진
Original Assignee
주식회사 오티콤
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Priority to KR1020140048678A priority Critical patent/KR20150122435A/en
Publication of KR20150122435A publication Critical patent/KR20150122435A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/015—High-definition television systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/22—Adaptations for optical transmission

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The present invention relates to a system for optical transmitting a broadcast signal, and a method for optical transmitting. The system for optical transmitting the broadcast signal comprising a remote device comprises: a light transmitting unit for coupling broadcast signals inputted from a remote device in a non-compressed state based on a time division multiplexing (TDM), conversing the broadcast signals to an ethernet signal, and outputting the ethernet signal into an optical signal; and a light receiving unit to receive the optical signal outputted from the light transmitting unit, conversing the optical signal into an electric signal, and outputting the broadcast signals, which are a circular signal, by releasing an ethernet in the electric signal and dividing a coupling broadcast signal by the coupling.

Description

TECHNICAL FIELD [0001] The present invention relates to a broadcast signal optical transmission system and an optical transmission method.

The present invention relates to a broadcast signal optical transmission system and an optical transmission method.

Currently, the broadcasting field is HD (high definition) digital broadcasting. For example, it broadcasts sports broadcasts such as baseball, soccer, and golf to high-definition HD broadcasting. As a result, fiber-optic cable is used to relay on-site broadcast relay equipment to high-definition HD broadcasting.

The on-site broadcast relay is performed through a center device such as a relay car equipped with equipment capable of transmitting broadcast to a broadcasting station, and a remote device such as an on-site camera connected to the center device by wired connection and providing a screen and sound in the field. Thus, the optical signal transmission system for high-quality outdoor relay broadcasting including the above-mentioned relay vehicle and the field camera is referred to as a broadcast signal optical transmission system.

The broadcast signal optical transmission system gradually relays UHD (Ultra High Definition Television) broadcasting for high-definition broadcast relay. The UHD broadcast relay requires, for example, four 3Gbps (bit per second) SDI (serial digital interface) signals for 4K UHD broadcast relay. As a result, 9 to 10 field cameras are required for major league baseball relaying. Therefore, when the capacity is calculated, the capacity of 4 X 3 bps SDI signals X 10 field cameras = 120G bps should be transmitted from the field camera to the relay vehicle do.

However, since the hybrid cable of the relay system currently consists of two optical cables, two data lines, and two power supply lines, it is not possible to transmit broadcast signals for UHD broadcast relay to the current transmission capacity. Therefore, a UHD broadcast relay system Which is very inconvenient.

In order to overcome this problem, a technique of Patent Document 1 has been proposed. The technology of this document proposes a technique of generating broadcast / communication optical signals by wavelength multiplexing satellite broadcast optical signals and optical communication signals. However, since Patent Document 1 uses a wavelength multiplexing technique, there is a problem of increase in product price and complexity of the system.

In addition, the broadcast signal optical transmission system has a problem that a relay vehicle or a center device equivalent thereto must be provided at a site to be broadcasted.

Patent Document 1: Korean Patent No. 10-1229182 (2013. 01. 28.)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and it is an object of the present invention to provide a UHD broadcast relay system capable of enhancing broadcast image quality even in an environment in which a capacity for transmitting broadcast signals input from a remote device is insufficient, A broadcast signal optical transmission system and an optical transmission method.

According to an aspect of the present invention, there is provided a broadcast signal optical transmission system including a remote device, the broadcast signal optical transmission system including a time division multiplexing (TDM) based broadcast signal input from the remote device, An optical transmitter for converting the Ethernet signal into an Ethernet signal and outputting the Ethernet signal as an optical signal; and an optical receiver for receiving the optical signal output from the optical transmitter and converting the received optical signal into an electrical signal, And outputs the broadcast signals as original signals.

The optical transmitter may further include a broadcast signal combiner for serializing the broadcast signals input from the remote device to a TDM-based uncompressed state to generate a combined broadcast signal, An Ethernet converter for converting the combined broadcasting signal into an Ethernet signal in cooperation with a MAC allocator for generating an Ethernet conversion protocol such as a protocol overhead so as to be able to set an Ethernet signal, And may include a light converting portion.

The optical receiver includes an electrical signal converter for converting an optical signal output from the optical transmitter 10 into an Ethernet signal as an electric signal, an Ethernet related protocol for eliminating the Ethernet system included in the Ethernet signal of the electrical signal converter, A broadcast signal conversion unit for converting the Ethernet signal into the combined broadcast signal in cooperation with a MAC removal unit for controlling the broadcast signal and a broadcast signal separation unit for separating a combined broadcast signal of the broadcast signal conversion unit into a full HD broadcast signal, Section.

According to another aspect of the present invention, there is provided a method of transmitting a broadcast signal, the method comprising: generating a combined broadcast signal by combining broadcast signals input from a remote device in an uncompressed state based on a TDM; converting the combined broadcast signal into an Ethernet signal , Outputting the Ethernet signal as an optical signal, converting the optical signal into an electrical signal, separating the Ethernet signal from the electrical signal, and outputting the broadcast signal as an original signal do.

The broadcast signal optical transmission system and the optical transmission method according to the present invention generate a combined broadcast signal by serializing the Full HD broadcast signals photographed by the remote device in a time division multiplexing (TDM: Time Division Multiplexing) -based uncompressed state, It is possible to transmit signals required for UHD-class high-definition relay broadcasting over a long distance through a dedicated cable or network. Therefore, even in an environment in which there is a lack of capacity for transmitting broadcast signals input from a remote device or a relay system, It is possible to improve the transmission efficiency of the broadcasting signal, improve the broadcasting image quality, improve the convenience of relay broadcasting, and reduce the cost.

1 is a block diagram illustrating an optical transmitter of a broadcast signal optical transmission system according to an embodiment.
2 is a block diagram illustrating a light receiving unit of a broadcast signal optical transmission system according to an embodiment.
3 is a schematic view showing a broadcast signal optical transmission method according to an embodiment,
4 is a schematic view showing a broadcast signal optical transmission method according to an embodiment using a relay.

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

FIG. 1 is a block diagram illustrating an optical transmitter of a broadcast signal optical transmission system according to an embodiment of the present invention, and FIG. 2 is a block diagram of a light receiver of a broadcast signal optical transmission system according to an embodiment.

As shown in FIGS. 1 and 2, the broadcast signal optical transmission system according to the embodiment includes an optical transmitter 10 and a light receiver 30.

Hereinafter, the optical transmitter 10 will be described in detail.

1, the optical transmitter 10 includes a broadcast signal input unit 11, a broadcast signal combiner 13, a media access control (MAC) allocator 15, an Ethernet converter 17 and a photo-conversion unit 19. [

The broadcast signal input unit 11 receives broadcast signals such as HD video signals, audio signals, and analog video signals from a field camera as a remote device. Here, the broadcast signal input unit 11 may receive audio, contact data, analog video, and full HD broadcast signals such as three 3G SDIs of 3G bps capacity from each of the field cameras.

The broadcast signal combination unit 13 serializes the broadcast signal input through the broadcast signal input unit 11 into an uncompressed state based on time division multiplexing (TDM: Time Division Multiplexing) Signal, and performs FORWARD ERROR CORRECTION (FEC) processing to prevent a transmission error (ERROR) when outputting the combined broadcast signal to the Ethernet conversion unit 17. [

Since the broadcast signal combining unit 13 performs the FEC process to detect the occurrence of the transmission error when outputting the combined broadcast signal to the Ethernet converting unit 17, the broadcast signal combining unit 13 improves the reliability of transmission data, .

The MAC allocator 15 generates an Ethernet conversion protocol such as a protocol overhead so as to set a signal transmission path of the combined broadcast signal.

The Ethernet converting unit 17 converts the combined broadcast signal output from the broadcast signal combining unit 13 into an Ethernet signal in cooperation with the MAC allocating unit 15. [ That is, the Ethernet converting unit 17 converts the combined broadcast signal into an Ethernet signal using the Ethernet conversion protocol of the MAC allocating unit 15.

For example, the Ethernet converter 17 converts the audio signal, the contact data, the analog video, and the full HD broadcast signal, such as three 3G SDIs of 3G bps capacity, from each of the field cameras to the broadcast signal input unit 11 When receiving the input, the full HD video signal can be converted into a 10G Ethernet signal. In addition, the 10G Ethernet signal, which is an uncompressed broadcast signal, has an advantage that it can be easily transmitted not only to a specific broadcasting station but also to any broadcasting station in which an Ethernet environment is established, so that the convenience of broadcasting editing can be improved.

The optical converting unit 19 converts the Ethernet signal of the Ethernet converting unit 17 into an optical signal.

Hereinafter, the light reception unit 30 will be described in detail.

2, the light receiving unit 30 includes an electric signal converting unit 31, a MAC removing unit 33, a broadcast signal converting unit 35, a broadcast signal separating unit 37, (39).

The electrical signal converting unit 31 converts the optical signal input from the optical converting unit 19 of the optical transmitting unit 10 into an Ethernet signal as an electric signal.

The MAC removing unit 33 controls the Ethernet related protocol to remove the Ethernet system included in the Ethernet signal of the electrical signal converting unit 31 in the broadcasting signal converting unit 35.

The broadcast signal converting unit 35 converts the Ethernet signal into the combined broadcast signal by removing the Ethernet scheme of the Ethernet signal of the electric signal converter 31 in cooperation with the MAC removing unit 33. [

The broadcast signal separator 37 separates the combined broadcast signal of the broadcast signal converter 35 into a full HD broadcast signal.

For example, when the electric signal converter 31 receives the 10G Ethernet signal, the broadcast signal separator 37 separates the combined broadcast signal of 10G bps capacity input from the broadcast signal converter 35 into a full- HD broadcasting signal audio, contact data, analog video and 3G SDI of 3G bps capacity can be separated into three.

The broadcast signal output unit 39 outputs the full HD broadcast signal input from the broadcast signal separation unit 37.

Hereinafter, a broadcast signal optical transmission method according to an embodiment will be described in detail.

3 is a diagram illustrating a broadcast signal optical transmission method according to an embodiment. As shown in FIG. 3, first, a plurality of field cameras 110, which are remote devices, are disposed at a photographing site, and each field camera 110 outputs the photographed broadcast signal to the optical transmitter 10.

The broadcast signal input unit 11 of the optical transmitter 10 receives broadcast signals such as HD video signals, audio signals, and analog video signals from the respective field cameras 110. Here, the broadcast signal input unit 11 can receive audio, contact data, analog video, and full HD broadcast signals such as three 3G SDIs of 3G bps capacity from each of the field cameras 110 .

Then, the broadcast signal combining unit 13 serializes the broadcast signal input through the broadcast signal input unit 11 into a TDM based non-compression state, and generates and outputs a combined broadcast signal combined in a 10G band.

Then, the Ethernet converting unit 17 converts the combined broadcasting signal output from the broadcasting signal combining unit 13 into an Ethernet signal in cooperation with the MAC allocating unit 15.

The Ethernet converter 17 converts the audio data, the contact data, the analog video data, and the 3 Gb / s 3G SDI data from the field cameras 110 into full HD When receiving a broadcast signal, the full HD video signal can be converted into a 10G Ethernet signal.

Subsequently, the optical signal converting unit 19 converts the Ethernet signal of the Ethernet converting unit 17 into an optical signal. The optical transmitter 10 outputs the optical signal of the optical signal converter 19 to the optical receiver 30. Here, the optical transmitter 10 and the optical receiver 30 may be connected by a composite cable and an optical cable.

The electrical signal converting unit 31 of the light receiving unit 30 converts the optical signal input from the optical signal converting unit 19 of the optical transmitting unit 10 into an Ethernet signal as an electric signal.

Thereafter, the broadcast signal converting unit 35 converts the Ethernet signal into a broadcast signal by removing the Ethernet scheme of the Ethernet signal of the electric signal converting unit 31 in cooperation with the MAC removing unit 33.

Subsequently, the broadcast signal separating unit 37 separates the broadcast signal of the broadcast signal converting unit 35 into a full HD broadcast signal. For example, when the electric signal converting unit 31 receives the 10G Ethernet signal, the broadcasting signal separating unit 37 separates the 10G bps broadcasting signal input from the broadcasting signal converting unit 35 into full HD The broadcast signal audio, contact data, analog video and 3G SDI of 3G bps capacity can be separated into three.

Then, the broadcast signal output unit 39 transmits the full HD broadcast signal input from the broadcast signal separation unit 37 to the studio 210. Since the full HD broadcasting signal input from the broadcasting signal separation unit 37 is an uncompressed broadcasting signal, it can be easily transmitted from the broadcasting signal output unit 39 to the studio 210.

4 is a diagram illustrating a broadcast signal optical transmission method according to an embodiment using a relay. As shown in FIG. 4, first, a relay vehicle 130, which is a center device, is disposed near a photographing site, and a plurality of field cameras 110 as a remote device are disposed at a photographing site. And outputs a broadcast signal to the optical transmitter 10.

The broadcast signal input unit 11 of the optical transmitter 10 receives a full HD broadcast signal from each field camera 110.

Then, the broadcast signal combining unit 13 generates and outputs a combined broadcast signal, which is serialized into the TDM based non-compressed state, through the broadcast signal input unit 11.

Then, the Ethernet converting unit 17 converts the combined broadcasting signal output from the broadcasting signal combining unit 13 into an Ethernet signal in cooperation with the MAC allocating unit 15.

Subsequently, the optical signal converting unit 19 converts the Ethernet signal of the Ethernet converting unit 17 into an optical signal. The optical transmitter 10 outputs the optical signal of the optical signal converter 19 to the optical receiver 30.

The electrical signal converting unit 31 of the light receiving unit 30 converts the optical signal input from the optical signal converting unit 19 of the optical transmitting unit 10 into an Ethernet signal as an electric signal.

Thereafter, the broadcast signal converting unit 35 converts the Ethernet signal into a broadcast signal by removing the Ethernet scheme of the Ethernet signal of the electric signal converting unit 31 in cooperation with the MAC removing unit 33.

Subsequently, the broadcast signal separating unit 37 separates the broadcast signal of the broadcast signal converting unit 35 into a full HD broadcast signal.

The broadcast signal output unit 39 outputs the full HD broadcast signal input from the broadcast signal separation unit 37 to the relay vehicle 130. The relay 130 transmits the full HD broadcast signal input through the broadcast signal output unit 39 to the studio 210.

As described above, in the broadcast signal optical transmission system and the optical transmission method according to the embodiment, full HD broadcast signals photographed by a remote device are serialized into a TDM based non-compressed state to generate a combined broadcast signal.

The broadcast signal optical transmission system and the optical transmission method according to the embodiments of the present invention output the combined broadcast signal to the center device, unlike the prior art in which the full HD broadcast signals photographed by the remote devices are output one by one to the center device, It is possible to stably supply UHD-class broadcast signals from a plurality of cameras to a relay vehicle using a composite optical cable in the field, and signals necessary for UHD-class high-quality outdoor relay broadcasting can be transmitted over a long distance through a dedicated cable or network, UHD broadcasting can be relayed even in an environment in which there is a lack of capacity for transmitting broadcast signals input from the UHD broadcasting system or in a situation where it is difficult to provide a relay system, thereby improving the transmission efficiency of broadcasting signals, improving the broadcasting image quality, have.

In addition, the broadcast signal optical transmission system and the optical transmission method according to the embodiment can transmit broadcast signals in an uncompressed manner even in a general Ethernet environment by converting a combined broadcast signal combined in a 10G band into an Ethernet form, thereby enabling uncompressed optical transmission through a network Therefore, real-time broadcasting signal sharing between national broadcasting stations is convenient, which can greatly contribute to networking of broadcasting signals.

In addition, since the broadcast signal optical transmission system and the optical transmission method according to the embodiments can be used as a center device, the broadcast relay can be performed without an intermediary vehicle in the field, thereby eliminating the need for the broadcast vehicle and personnel on the spot, It can be very simple and cost-effective.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various changes, modifications and substitutions are possible within the scope of the technical idea of the present invention.

10: optical transmission unit 11: broadcast signal input unit
13: Broadcast signal combining unit 15: MAC assigning unit
17: Ethernet converter 19:
30: light receiving section 31: electric signal converting section
33: MAC removal unit 35: broadcast signal conversion unit
37: Broadcast signal separation unit 39: Broadcast signal output unit

Claims (4)

In a broadcast signal optical transmission system having a remote device,
An optical transmitter for combining broadcasting signals input from the remote device into an uncompressed state based on TDM (Time Division Multiplexing), converting the broadcasting signals into an Ethernet signal, and outputting the Ethernet signal as an optical signal; And
A light receiver for receiving the optical signal output from the optical transmitter and converting the received optical signal into an electrical signal, separating the combined broadcast signal by releasing the Ethernet from the electrical signal, and outputting the broadcast signals as original signals;
And a broadcast signal transmission system. The method according to claim 1,
The optical transmitter includes:
A broadcast signal combiner for serializing the broadcast signals input from the remote device into a TDM-based non-compressed state to generate a combined broadcast signal;
An Ethernet converter for converting the combined broadcast signal into an Ethernet signal in cooperation with a MAC assigning unit for generating an Ethernet transcoding protocol such as a protocol overhead so as to set a signal transmission path of the combined broadcast signal; And
A light converting unit converting the Ethernet signal of the Ethernet converting unit into an optical signal;
And a broadcast signal transmission system. The method according to claim 1,
The light-
An electrical signal converter for converting the optical signal output from the optical transmitter 10 into an Ethernet signal as an electrical signal;
A broadcast signal converting unit for converting the Ethernet signal into the combined broadcast signal in cooperation with a MAC removal unit for managing an Ethernet related protocol to remove an Ethernet system included in the Ethernet signal of the electrical signal converting unit; And
A broadcast signal separator for separating a combined broadcast signal of the broadcast signal converter into a full HD (High Definition) broadcast signal;
And a broadcast signal transmission system. Generating a combined broadcast signal by combining broadcast signals input from a remote device into a TDM-based non-compressed state;
Converting the combined broadcast signal into an Ethernet signal;
Outputting the Ethernet signal as an optical signal; And
Receiving the optical signal and converting the optical signal into an electrical signal, separating the Ethernet release and the combined broadcast signal from the electrical signal, and outputting the broadcast signals as original signals;
And transmitting the broadcast signal.
KR1020140048678A 2014-04-23 2014-04-23 System of optical transmission for broadcast signal and method thereof KR20150122435A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018070580A1 (en) * 2016-10-12 2018-04-19 (주)캐스트윈 Uhd multi-format processing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018070580A1 (en) * 2016-10-12 2018-04-19 (주)캐스트윈 Uhd multi-format processing device

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