WO2012081868A1 - Method and apparatus for transmitting or receiving data in broadcast system - Google Patents

Method and apparatus for transmitting or receiving data in broadcast system Download PDF

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Publication number
WO2012081868A1
WO2012081868A1 PCT/KR2011/009530 KR2011009530W WO2012081868A1 WO 2012081868 A1 WO2012081868 A1 WO 2012081868A1 KR 2011009530 W KR2011009530 W KR 2011009530W WO 2012081868 A1 WO2012081868 A1 WO 2012081868A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency
frame
data
section
data stream
Prior art date
Application number
PCT/KR2011/009530
Other languages
English (en)
French (fr)
Inventor
Alain Mourad
Ismael Gutierrez
Sung-Ryul Yun
Original Assignee
Samsung Electronics Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB1021113.4A external-priority patent/GB2484154A/en
Application filed by Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Priority to EP11849822.9A priority Critical patent/EP2652943A4/en
Publication of WO2012081868A1 publication Critical patent/WO2012081868A1/en

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Classifications

    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1881—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with schedule organisation, e.g. priority, sequence management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/70—Media network packetisation
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Definitions

  • the present invention relates generally to broadcast systems, and more specifically, to a method and apparatus relating to transmission and reception of data streams in digital video broadcast systems.
  • At least part of the data stream is mapped to a first frequency zone of the plurality of frequency zones for each of the plurality of frames.
  • a signalling information word is generated that carries signalling relating to a position and a bandwidth of at least the first frequency zone in the frequency domain to assist in reception of the data stream.
  • the signalling information word is included in the preamble section of at least a given frame of the plurality of frames.
  • the preamble section is transmitted within a first frequency bandwidth and the first frequency zone is transmitted within a second frequency bandwidth.
  • the first frequency bandwidth is greater than the second frequency bandwidth.
  • a transmitter for transmitting data having a data stream in a broadcast system.
  • the transmitter includes a mapping unit that maps the data stream onto a super-frame comprising a plurality of frames.
  • Each of the plurality of frames includes a preamble section and a data section.
  • the preamble section and the data section are time-multiplexed.
  • the data section carries the data stream, and the preamble section carries at least signalling information.
  • the mapping unit also maps at least part of the data stream to a first frequency zone of a plurality of frequency zones for each of the plurality of frames.
  • the apparatus also includes a segmenting unit that segments the data section of each of the plurality of frames into the plurality of frequency zones.
  • FIG. 5 is a diagram illustrating mapping of frequency interleaving zones to physical layer zones, according to an embodiment of the present invention
  • FIG. 15 is a table showing a further example of the L1-dynamic-Ext signalling field, according to another embodiment of the present invention.
  • the L1 Config section 12 typically carries information that is valid for each frame of the super-frame, and is typically the same for each frame of the super-frame.
  • the L1-Dynamic section 14 typically varies from frame to frame, and relates to decoding the PLP within the frame. Typically, the L1-Dynamic section 14 will include a start address of the PLP, for example.
  • the number of PLPs mapped onto a super-frame increases. However, each PLP may not be mapped to every frame. Carrying signalling information, and in particular L1-Dynamic information, relating to each PLP in each frame may involve a significant overhead in terms of signalling information.
  • the limit to the number of data streams for which information is carried in the first signalling information field is determined in accordance with the robustness of the transmission of the field, so that a lower limit to the size the first signalling information field may be set to a sufficient size to give adequate robustness taking into account frequency diversity and robustness of the transmission scheme.
  • the first signalling information field may also be set to a size that is sufficiently large, such that it may accommodate an expected amount of signalling information related to active and passive data streams per frame, so that any overflow of signalling information beyond the expected amount may be carried in the second signalling information field.
  • An indication of the limit may be carried in the preamble section of each frame, typically in the L1-Config section 12.
  • the segmenting of the data section of each frame may be done at logic frame level, so that the implementation of a transmitter and a receiver may be simplified and the bandwidth and position of frequency zones may be allocated flexibly.
  • a signalling generation block 450 contains the information of the logical frame structure related to PLP, TIF and FIZ.
  • a Logic Frame Assembly block 490 includes a logical frame structure by assembling the different TIFSs and FIZ.
  • FIG. 2 describes the logical frame structure, which is the output of the Logic Frame Assembly block.
  • Interleaving within a frequency interleaving zone and/or within a TIFS may be frequency-wise interleaving, so that successive parts of a data stream are mapped across parts of an OFDM symbol in frequency. The mapping may then moves on to map to parts of another orthogonal frequency division multiplexing symbol in frequency, and so on.
  • the mapping may be time-wise interleaving, so that successive parts of a data stream are mapped in time across a succession of OFDM symbols, and then typically the mapping moves on to map in time to other frequency parts of the succession of OFDM symbols, and so on.
  • NUM_PLP_ext An 8-bit field indicating the number of active PLPs in the second signalling part (in case the number of PLPs in the frame exceeds the limit).
  • NUM_FIZ A 3-bit field indicating the number of FIZs.
  • NUM_TIFS_a An 8-bit field indicating the number of TIFSs in the frame.
  • FIZ_LENGTH A 10-bit field indicating the size of one FIZ in OFDM cells.
  • FIG. 14 is a table showing the L1-dynamic signalling field, according to another embodiment of the present invention. Specifically, FIG. 14 illustrates a further example of a L1-dynamic signalling word, including signalling relating to TIFSs. Signalling fields 44 and 46 are described in detail below.
  • PLP_TIFS_LENGTH A 15-bit field indicating the size of the PLP in the given TIFS.
  • PLP_TIFS_DRAME_IDX A 1-bit field indicating the frame index of the PLP mapped onto the given TIFS.
  • FIG. 15 is a table showing a further example of the L1-dynamic-Ext signalling field, according to another embodiment of the present invention. Specifically, FIG. 15 illustrates a further example of a L1-config-ext signalling word, including signalling relating to TIFSs. Signalling fields 48 are similar to the signalling fields in FIG. 14, but are used for the extended TIFS. IDLE_PLP, PLP_ID and PLP_DELTA are similar to the definitions provided with respect to FIG. 12.
  • FIG. 17 is a table showing the L1-pre-signalling field, according to an embodiment of the present invention. Specifically, FIG. 17 illustrates an example of a L1-pre signalling word, including signalling relating to physical layer zones. Signalling fields 52 are defined as set forth below.
  • FIG. 18 is a table showing the L1-config signalling field, according to another embodiment of the present invention.
  • FIG. 18 illustrates a yet further example of a L1-config signalling word, including signalling relating to physical layer zones.
  • Signalling fields 54, 56, 58 and 60 are defined as set forth below.
  • PZ_GUARD_INTERVAL A 1-bit field indicating the OFDM guard interval used in the given physical zone.
PCT/KR2011/009530 2010-12-13 2011-12-12 Method and apparatus for transmitting or receiving data in broadcast system WO2012081868A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11849822.9A EP2652943A4 (en) 2010-12-13 2011-12-12 METHOD AND APPARATUS FOR TRANSMITTING DATA HAVING A DATA STREAM IN A WIRELESS BROADCAST SYSTEM

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1021113.4A GB2484154A (en) 2010-09-29 2010-12-13 Frame structure for a digital broadcasting system
GB1021113.4 2010-12-13

Publications (1)

Publication Number Publication Date
WO2012081868A1 true WO2012081868A1 (en) 2012-06-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2011/009530 WO2012081868A1 (en) 2010-12-13 2011-12-12 Method and apparatus for transmitting or receiving data in broadcast system

Country Status (3)

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EP (1) EP2652943A4 (ko)
KR (1) KR20120068705A (ko)
WO (1) WO2012081868A1 (ko)

Citations (3)

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KR20090044515A (ko) * 2007-10-31 2009-05-07 삼성전자주식회사 무선 디지털 방송 시스템에서 방송 데이터를 송수신하는방법 및 장치
US20090304023A1 (en) * 2008-06-04 2009-12-10 Sony Corporation New frame and training pattern structure for multi-carrier systems
US20100135316A1 (en) * 2008-10-09 2010-06-03 Sony Corporation Frame and data pattern structure for multi-carrier systems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0810962D0 (en) * 2008-06-04 2008-07-23 Sony Uk Ltd Digital signal reception
EP2207282B1 (en) * 2009-01-08 2017-09-27 LG Electronics Inc. Method of transmitting and receiving a broadcast signal and apparatus for transmitting and receiving a broadcast signal
US8411737B2 (en) * 2009-03-05 2013-04-02 Nokia Corporation Transmission of physical layer signaling in a broadcast system
US20100262708A1 (en) * 2009-04-08 2010-10-14 Nokia Corporation Method and apparatus for delivery of scalable media data

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
KR20090044515A (ko) * 2007-10-31 2009-05-07 삼성전자주식회사 무선 디지털 방송 시스템에서 방송 데이터를 송수신하는방법 및 장치
US20090304023A1 (en) * 2008-06-04 2009-12-10 Sony Corporation New frame and training pattern structure for multi-carrier systems
US20100034219A1 (en) * 2008-06-04 2010-02-11 Sony Corporation Frame and signalling pattern structure for multi-carrier systems
US20100135316A1 (en) * 2008-10-09 2010-06-03 Sony Corporation Frame and data pattern structure for multi-carrier systems

Non-Patent Citations (1)

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Title
See also references of EP2652943A4 *

Also Published As

Publication number Publication date
EP2652943A1 (en) 2013-10-23
KR20120068705A (ko) 2012-06-27
EP2652943A4 (en) 2014-08-27

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