CN107360447B - Broadcasting system - Google Patents

Broadcasting system Download PDF

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Publication number
CN107360447B
CN107360447B CN201710302024.6A CN201710302024A CN107360447B CN 107360447 B CN107360447 B CN 107360447B CN 201710302024 A CN201710302024 A CN 201710302024A CN 107360447 B CN107360447 B CN 107360447B
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signal
base station
program stream
local
tower
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CN107360447A (en
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张文军
宫丰奎
葛建华
何大治
管云峰
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Xidian University
Shanghai National Engineering Research Center of Digital Television Co Ltd
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Xidian University
Shanghai National Engineering Research Center of Digital Television Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation

Abstract

The invention discloses a broadcasting system. Wherein, the broadcasting system includes: the system comprises a broadcasting tower, a local base station and a user terminal within the coverage range of the broadcasting tower, wherein the broadcasting tower is suitable for sending a first signal to the local base station and the user terminal, and the first signal comprises a public program stream within the coverage range of the broadcasting tower; and the local base station is suitable for receiving a first signal transmitted by the broadcasting tower, demodulating the first signal to a modulation symbol level, mapping the local program stream into complex symbols, performing phase rotation on the modulation symbol level based on the complex symbols to obtain a second signal, and transmitting the second signal to the user terminal within the coverage range of the local base station. The technical scheme adopts a cooperative space-time coding scheme of relay rotation forwarding, so that not only time-frequency resource blocks are saved, but also the user terminal can demodulate the received public program stream and the local program stream by adopting the same demodulation algorithm, and the complexity of receiving processing is simplified.

Description

Broadcasting system
The present application is a divisional application of an original, having an application number of 201410172422.7, application date 2014, 4/28, and is entitled "method for inserting local program stream in broadcasting system and broadcasting system".
Technical Field
The present invention relates to the field of broadcasting system technology, and in particular, to a broadcasting system capable of inserting local program streams.
Background
According to the general planning of Next Generation broadcast Network (NGB), the NGB Network is composed of a core Network and an access Network. The NGB core network bears the NGB service platform, the operation maintenance, the network management, the charging authentication, the safety management and other network support platforms, and provides comprehensive three-network integration service for users. The NGB access network is composed of an NGB wired system (NGB-C) and an NGB wireless system (NGB-W), the NGB-C provides broadband home service for users, the NGB-W provides wireless broadcast and two-way communication service for the users, and the NGB wired system and the NGB wireless system can realize seamless switching and roaming in a network layer, and finally realize whole-course whole-network coverage of the NGB.
The NGB-W is formed by an NGB-W wide area network and an NGB-W home local area network. The mobile user can select an appropriate access network according to the communication environment in which the mobile user is located. When the mobile user is in the coverage range of the NGB-W home local area network, the mobile user can be communicated with the wireless home gateway through the NGB-W home local area network and then is accessed to the core network through the NGB-C; when the mobile user is in the coverage area of the NGB-W wide area network, the core network can be accessed directly through the NGB-W wide area network.
In an NGB-W network architecture, a broadcast tower and a bidirectional communication local base station are cooperatively covered, and broadcast push and bidirectional transmission are mutually fused; the broadcasting tower is based on a traditional broadcasting network and mainly realizes large-area coverage of unidirectional broadcasting and data pushing; the local base station is based on the traditional cellular network and mainly realizes the services of broadcast supplementary point coverage, data push supplementary transmission, cell multicast, on-demand and two-way communication and the like.
In the prior art, a local base station mainly uses a method of reserving OFDM subcarriers to send a local program stream to a user terminal within its coverage area. Therefore, additional subcarriers (instant frequency domain resources) need to be occupied, and the local base station modulates the local program stream and the public program stream respectively in a modulation mode different from that of the broadcast tower, so that the user terminal needs to process the received signals by adopting different demodulation algorithms, and the complexity of the user terminal is increased.
Disclosure of Invention
The invention solves the problem that in the existing NGW-W broadcasting system, the mode of sending the local program stream by the local base station needs to occupy additional subcarriers and increases the complexity of the demodulation processing of the user terminal.
To solve the above problem, an embodiment of the present invention provides a method for a local base station to insert a local program stream in a broadcast system, including the following steps: receiving a first signal transmitted from a broadcast tower, wherein the first signal comprises a public program stream in the coverage range of the broadcast tower; demodulating the first signal to a modulation symbol level; mapping the local program stream into complex symbols; the modulation symbol levels are phase rotated based on the complex symbols to obtain a second signal.
Optionally, the first signal is obtained by the broadcasting tower performing planet seat mapping and space-time block coding on the common program stream.
Optionally, the mapping the local program stream into complex symbols includes: and mapping the local program stream into different complex symbols, wherein the phase difference between the different complex symbols is 90 degrees.
Optionally, the complex symbol is 1 or j.
Optionally, the phase rotating the modulation symbol level based on the complex symbol to obtain the second signal includes: the modulation symbol level is divided by the complex symbol to obtain a second signal.
An embodiment of the present invention further provides a broadcasting system, including: a broadcasting tower, a local base station and a user terminal within the coverage range of the broadcasting tower; wherein the broadcast tower is adapted to transmit a first signal to a local base station and a user terminal, the first signal containing a common program stream within the coverage of the broadcast tower; the local base station is adapted to receive a first signal transmitted from a broadcast tower and demodulate the first signal to a modulation symbol level, map a local program stream to complex symbols and phase rotate the modulation symbol level based on the complex symbols to obtain a second signal, and transmit the second signal to a user terminal within a coverage of the local base station.
Optionally, the first signal is obtained by the broadcasting tower performing planet seat mapping and space-time block coding on the common program stream.
Optionally, the broadcast tower is configured with two antennas, the local base station is configured with three antennas, and the user terminal is configured with one antenna; one of the three antennas configured by the local base station is configured to receive the first signal, and the other two antennas are configured to transmit the second signal.
Optionally, the broadcasting system is NGB-W.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
in a broadcasting system, a local base station demodulates a first signal which is sent by a broadcasting tower and contains a public program stream to a modulation symbol level after receiving the first signal, then maps the local program stream into a complex symbol, and performs phase rotation on the modulation symbol level based on the complex symbol, thereby realizing the insertion of the local program stream into the public program stream transmitted by the broadcasting tower. Therefore, no extra subcarrier is occupied, and the user terminal can demodulate the received public program stream and the local program stream by adopting the same demodulation algorithm, thereby simplifying the complexity of receiving processing.
Drawings
Fig. 1 is a flowchart illustrating an embodiment of a method for inserting a local program stream by a local base station in a broadcasting system according to the present invention;
fig. 2 (a) to 2 (e) are constellation diagrams of a broadcasting tower pair into a planet seat mapping to a common program stream in the broadcasting system of the present invention; and
fig. 3 is a schematic diagram of a broadcast system of the present invention.
Detailed Description
The inventor finds that in the existing NGW-W broadcasting system, the manner in which the local base station transmits the local program stream needs to occupy additional subcarriers, and increases the complexity of the demodulation processing of the user terminal.
In view of the above problems, the inventors have studied and provided a method for inserting a local program stream in a broadcasting system and a broadcasting system. The technical scheme adopts a cooperative space-time coding scheme of relay rotation forwarding, inserts local program streams into public program streams transmitted by a broadcast big bridge and sends the public program streams to the user terminal within the coverage range of the local base station. Therefore, not only the time-frequency resource block is saved, but also the user terminal can adopt the same demodulation algorithm to demodulate the received public program stream and the local program stream, and the complexity of the receiving processing is simplified.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The technical solution is mainly described by taking an NGB-W broadcast system as an example, where the broadcast tower is configured with two antennas (as transmitting antennas), the local base station is configured with three antennas (one of the antennas is used for receiving a signal sent by the broadcast tower, and the other two antennas are used for sending a signal obtained by processing the received signal sent by the broadcast tower, that is, a signal generated by inserting a local program stream), and the user terminal is configured with one antenna (which may be used as a transmitting antenna or a receiving antenna). In other embodiments, if the broadcasting tower and the local base station are connected by a wire, the local base station may only configure two antennas, the local base station receives the signal transmitted by the broadcasting tower by means of the wire connection, and the two antennas are used as transmitting antennas to transmit the signal generated by inserting the local program stream to the user terminal in its coverage area.
However, the present invention is not limited to the NGB-W broadcast system, and those skilled in the art may also adopt the present invention in other broadcast systems with similar structures.
Fig. 1 is a flowchart illustrating an embodiment of a method for inserting a local program stream by a local base station in a broadcasting system according to the present invention. Referring to fig. 1, the method includes the steps of:
step S11: receiving a first signal transmitted from a broadcast tower, wherein the first signal comprises a public program stream in the coverage range of the broadcast tower;
step S12: demodulating the first signal to a modulation symbol level;
step S13: mapping the local program stream into complex symbols;
step S14: the modulation symbol levels are phase rotated based on the complex symbols to obtain a second signal.
In this embodiment, the local base station in the broadcast system is mainly used to perform the above steps.
Specifically, as shown in step S11, a first signal transmitted from a broadcast tower is received, where the first signal contains a common program stream within the coverage of the broadcast tower.
The first signal transmitted by the broadcast tower can be received by both the local base station and the user terminal within the coverage area of the broadcast tower. After receiving the first signal, the user terminal may process the first signal by using an existing demodulation and decoding method to obtain a common program stream. After receiving the first signal, each local base station inserts the local program stream to be transmitted into the common program stream (the specific process will be described in the following steps S12 to S14), and then transmits the local program stream and the common program stream together to the user terminal within the coverage area of the local base station.
In this embodiment, the first signal is obtained by the broadcasting tower performing planet seat mapping and space-time block coding on the received common program stream. As shown in fig. 2 (a) to 2 (e), the constellation of the planet seat mapping of the broadcasting tower pair to the common program stream in the broadcasting system of the present invention is shown.
Specifically, (a) in fig. 2 is a schematic diagram of constellation mapping using a QPSK constellation. The input common program stream (i.e., bit stream) is mapped to one half of the constellation symbols in QPSK, i.e., {1+ j, -1-j }, as shown in (a) of fig. 2, in groups of 1 bit each.
Fig. 2 (b) is a schematic diagram of constellation mapping using a 4-QAM constellation. Mapping the input common program stream into one half of the constellation symbols in the 4-QAM constellation shown in (b) of FIG. 2, namely {1+ j, 3-j, -1-j, -3+ j } in groups of every 2 bits.
Fig. 2 (c) is a schematic diagram of constellation mapping using an 8-QAM constellation. Mapping the input common program stream into one half of the constellation symbols in the 8-QAM constellation shown in (c) of FIG. 2, namely {1+ j, -1-j, 3+3j, 3-j, 1-3j, -3-3j, -3+ j, -1+3j }.
Fig. 2 (d) is a schematic diagram of constellation mapping using a 16-QAM constellation. Mapping the input common program stream into constellation symbols of half of the 16-QAM constellation shown in (d) in FIG. 2, namely {1+ j, -1-j, 3+3j, 3-j, 1-3j, -3-3j, -3+ j, -1+3j, 1+5j, 5+ j, 5-3j, 3-5j, -1-5j, -5-j, -5+3j, -3+5j }.
Fig. 2 (e) is a schematic diagram of constellation mapping using a 32-QAM constellation. Mapping each 5 bit groups of the input common program stream into one half of the constellation symbols in the 32QAM constellation shown in (e) in FIG. 2, namely {1+ j, -1-j, 3+3j, 3-j, 1-3j, -3-3j, -3+ j, -1+3j, 1+5j, 5+5j, 5+ j, 5-3j, 3-5j, -1-5j, -5-5j, -5-j, -5+3j, -3+5j, 7+3j, 7+7j, 7+3j, 7-j, 7-5j, 5-7j, 1-7j, -3-7j, -7-7j, -7-3j, -7+ j, -7+5j, -5+7j, -1+7j }.
In the above fig. 2 (a) to 2 (e), the broadcast tower maps the common program stream to the constellation points corresponding to the solid dots in the figure, and the constellations formed by the solid dots and the hollow dots have invariance of rotation of 90 degrees, 180 degrees and 270 degrees.
It should be noted that, for the whole broadcast system, before the broadcast tower performs constellation mapping on the common program stream, the data rate of the local base station is required to be less than or equal to the data rate of the broadcast tower, which is related to the modulation method adopted by the broadcast tower, and finally the symbol rate of the broadcast tower is required to be equal to the bit rate of the local base station.
In this embodiment, for example, the constellation symbol corresponding to the received common program stream on the constellation map after the common program stream is mapped by the broadcasting tower is
Figure GDA0002239518420000061
Then, a first signal is obtained after space-time block coding is adopted, and the first signal is sent out, and an output matrix can be expressed as:
Figure GDA0002239518420000071
k＝0,1,...,NCell,FEC_block/2-1
wherein, the data unit pair (x)2k,Tx1,x2k+1,Tx1) Antenna 1, data unit pair (x) corresponding to a broadcast tower2k,Tx2,x2k+1,Tx2) Corresponding to the antenna 2 of the broadcast tower, the columns are orthogonal to each other, and the transmitted first signal is also orthogonal, so that the receiving end (e.g., the user terminal or the local base station) can employ log-likelihood ratio decoding. For example, at time T, the first signals respectively emitted by antenna 1 and antenna 2 are z2′kAnd z2′k+1(ii) a At the next time (i.e. time T + 1), the first signals sent by antenna 1 and antenna 2 are
Figure GDA0002239518420000072
And
further, the pair of data units (x)2k,Tx1,x2k+1,Tx1) And a data unit pair (x)2k,Tx2,x2k+1,Tx2) Is the pair of data units transmitted by antenna 1 and antenna 2 of the broadcast tower on different OFDM sub-carriers. And, the data transmitted by two data unit pairs are mapped to the same OFDM symbol and on adjacent subcarriers.
The first signal is demodulated to the modulation symbol level as described in step S12.
Specifically, the local bs receives the first signal and then demodulates (including but not limited to synchronization, FFT, etc.), but does not need to decode the first signal and only needs to demodulate the first signal to the modulation symbol level (e.g., set to r)2k，r2k+1)。
In fact, the local base station and the user terminal receive the first signal transmitted by the broadcast tower and then perform demodulation processes substantially in accordance. In this embodiment, since the local base station needs to further insert the local program stream into the common program stream, the local base station only needs to demodulate the first signal to the modulation symbol level, and does not need to further decode.
The local program stream is mapped to complex symbols as described in step S13.
Specifically, in this step, the local program stream may be mapped to the same complex symbol, or the local program stream may be mapped to different complex symbols. It should be noted that, when the local program stream is mapped to different complex symbols, the phase difference between the different complex symbols is 90 degrees. In a preferred embodiment, for example, the local program stream (set to y) may be mapped to complex symbols 1 or j.
The modulation symbol levels are phase-rotated based on the complex symbols to obtain a second signal, as depicted in step S14.
In particular, in a preferred embodiment, the modulation symbol level is divided by the complex symbol to obtain the second signal. For example, a2k，r2k+1And a second signal obtained after dividing by y is sent to the user terminal. The second signal output by the local base station is represented as:
Figure GDA0002239518420000081
by adopting the local program insertion method of the embodiment of the invention, no extra subcarrier is occupied, and the user terminal can demodulate the received public program stream and the local program stream by adopting the same demodulation algorithm, thereby simplifying the complexity of receiving processing.
The embodiment of the invention also provides a broadcasting system. Fig. 3 is a schematic diagram of a broadcast system according to the present invention.
Referring to fig. 3, the broadcasting system includes: a broadcast tower 11 and a local base station 12 and a user terminal 13 within the coverage of the broadcast tower 11. It should be noted that fig. 3 is only a schematic diagram, and in practical applications, a broadcast system generally includes a plurality of broadcast towers, each broadcast tower includes a plurality of local base stations and user terminals within a coverage area.
In the present embodiment, the broadcast tower 11 is configured with two antennas, the local base station 12 is configured with three antennas, and the user terminal 13 is configured with one antenna; one of the three antennas configured in the local base station 11 is configured to receive the first signal, and the other two antennas are configured to transmit the second signal. The broadcast system is NGB-W, but is not limited thereto.
In other embodiments, if the broadcasting tower 11 and the local base station 12 are connected by a wire, the local base station 12 may be configured with only two antennas. The local base station 12 receives the signal transmitted by the broadcasting tower by means of wired connection, and the two antennas are used as transmitting antennas to transmit the signal generated by inserting the local program stream to the user terminal 13 in the coverage area.
The broadcast tower 11 is adapted to transmit a first signal containing a common program stream within the coverage of the broadcast tower to the local base station 12 and the user terminal 13.
The local base station 12 is adapted to receive a first signal transmitted from the broadcast tower 11 and demodulate the first signal to a modulation symbol level, map the local program stream to complex symbols and phase rotate the modulation symbol level based on the complex symbols to obtain a second signal, and transmit the second signal to the user terminals 13 within the coverage of the local base station 12. The first signal is obtained by the broadcasting tower after the public program stream is subjected to planet seat mapping and space-time block coding.
The processing procedure after the local base station receives the first signal in this embodiment may refer to the embodiment described in fig. 1 above, and is not described herein again.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.

Claims (2)

1. A broadcast system, comprising: a broadcast tower, a local base station and a user terminal within the coverage of said broadcast tower, wherein,
the broadcasting tower is suitable for transmitting a first signal to the local base station and the user terminal, wherein the first signal contains a public program stream in the coverage range of the broadcasting tower; and
the local base station is suitable for receiving the first signal sent by the broadcast tower, demodulating the first signal to a modulation symbol level, mapping a local program stream to a complex symbol, performing phase rotation on the modulation symbol level based on the complex symbol to obtain a second signal, and sending the second signal to the user terminal within the coverage range of the local base station;
the first signal is obtained by the broadcasting tower after the public program stream is subjected to planet seat mapping and space-time block coding;
the broadcasting tower is configured with two antennas, the local base station is configured with three antennas, and the user terminal is configured with one antenna, wherein one of the three antennas configured by the local base station is used for receiving the first signal, and the other two antennas are used for sending the second signal.
2. The broadcast system of claim 1, wherein the broadcast system is an NGB-W.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1250277A (en) * 1998-09-30 2000-04-12 松下电器产业株式会社 Digital audio frequency broadcasting receiver
CN1998145A (en) * 2004-04-16 2007-07-11 索尼爱立信移动通讯股份有限公司 A low cost method for receiving broadcast channels with a cellular terminal
CN105025311B (en) * 2014-04-28 2018-01-23 上海数字电视国家工程研究中心有限公司 The insertion method and broadcast system of local program stream in broadcast system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
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US20030053493A1 (en) * 2001-09-18 2003-03-20 Joseph Graham Mobley Allocation of bit streams for communication over-multi-carrier frequency-division multiplexing (FDM)
WO2003039152A2 (en) * 2001-10-31 2003-05-08 Goldpocket Interactive System and method for itv data automation via a broadcast traffic and scheduling system
CN101039295B (en) * 2006-03-15 2012-01-11 方正宽带网络服务股份有限公司 Method for improving synchronization performance of OFDM system using low correlated code
CN101192906B (en) * 2006-12-01 2010-09-29 中兴通讯股份有限公司 Method for transferring HARQ response message based on E-HICH channel of TD-SCDMA system
CN101414898A (en) * 2007-10-19 2009-04-22 华为技术有限公司 Receive coalition method, system and equipment
KR101820308B1 (en) * 2010-09-15 2018-01-19 삼성전자주식회사 Digital broadcast transmitter, digital broadcast receiver, methods for constructing and processing streams thereof
US9264747B2 (en) * 2012-03-11 2016-02-16 Broadcom Corporation Audio/video channel bonding configuration adaptations
CN103716276B (en) * 2013-12-13 2017-07-07 清华大学 A kind of multi-service transmission divided based on physical-layer sub-channel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1250277A (en) * 1998-09-30 2000-04-12 松下电器产业株式会社 Digital audio frequency broadcasting receiver
CN1998145A (en) * 2004-04-16 2007-07-11 索尼爱立信移动通讯股份有限公司 A low cost method for receiving broadcast channels with a cellular terminal
CN105025311B (en) * 2014-04-28 2018-01-23 上海数字电视国家工程研究中心有限公司 The insertion method and broadcast system of local program stream in broadcast system

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