Broadcast signal frame generation apparatus and broadcast signal frame generation method using layered division multiplexing

• US 10,389,973 B2
• Filed: 08/24/2018
• Issued: 08/20/2019
• Est. Priority Date: 04/20/2015
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Lee, Jae-Young, Park, Sung-Ik, Kwon, Sun-Hyoung, Kim, Heung-Mook
• Primary Examiner(s): Tadese, Berhanu
• Application Number:
  US16/112,454
• Publication Number:
  US 20180367753A1
• Time in Patent Office: 361 Days
• CPC Class Codes: H04H 20/42 Arrangements for resource management
• CPC Class Codes: H04H 20/72 of terrestrial networks
• CPC Class Codes: H04H 60/07 characterised by processes or methods for the generation
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/007 Unequal error protection for format H04L1/0078; for codes per se H03M13/35
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2626 Arrangements specific to the transmitter only
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 27/3488 Multiresolution systems
• CPC Class Codes: H04N 19/187 the unit being a scalable video layer
• CPC Class Codes: H04N 21/2343 involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements video transcoding H04N19/40; media packet handling at the source H04L65/762
• CPC Class Codes: H04N 21/234327 by decomposing into layers, e.g. base layer and one or more enhancement layers
• CPC Class Codes: H04N 21/236 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 multiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00
• CPC Class Codes: H04N 21/2383 : Channel coding or modulation of digital bit-stream, e.g. QPSK modulation arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 3/28 : producing multiple scanning, i.e. using more than one spot at the same time
• CPC Class Codes: H04N 5/445 : for displaying additional information H04N5/50 takes precedence
• CPC Class Codes: H04N 7/0122 : the input and the output signals having different aspect ratios
• CPC Class Codes: H04N 7/081 : the additional information signals being transmitted by means of a subcarrier
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

An apparatus and method for broadcast signal frame using layered division multiplexing are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a combiner configured to generate a multiplexed signal by combining a core layer signal and an enhanced layer signal at different power levels; a power normalizer configured to reduce the power of the multiplexed signal to a power level corresponding to the core layer signal; a time interleaver configured to generate a time-interleaved signal by performing interleaving that is applied to both the core layer signal and the enhanced layer signal; and a frame builder configured to generate a broadcast signal frame including a preamble for signaling, size information of Physical Layer Pipes (PLPs) and time interleaver information shared by the core layer signal and the enhanced layer signal.

Claims

1. A method of generating broadcast signal frame, comprising:

generating, by a combiner, a multiplexed signal by combining a core layer signal and a power reduced enhanced layer signal;

reducing, by a power normalizer, power of the multiplexed signal to a power level corresponding to the core layer signal;

generating, by a time interleaver, a time-interleaved signal by performing interleaving that is applied to both the core layer signal and the enhanced layer signal; and

generating, by a frame builder, a broadcast signal frame including a preamble for signaling, size information of Physical Layer Pipes (PLPs) and time interleaver information shared by the core layer signal and the enhanced layer signal,

wherein the power reduced enhanced layer signal is generated corresponding to a scaling factor and the reducing power of the multiplexed signal corresponds to a normalizing factor,

wherein the size information is generated based on the number of data cells allocated to the Physical Layer Pipe,

wherein the normalizing factor is a rational number greater than zero and smaller than one, and

wherein the size information is included for every Physical Layer Pipe (PLP) inside of Number of PLP (NUM_PLP) loop.

2. The method of claim 1, wherein the scaling factor decreases as a reduction in power corresponding to an injection level of the enhanced layer signal becomes larger, and the normalizing factor increases as the reduction in power corresponding to the injection level of the enhanced layer signal becomes larger.

3. The method of claim 1, wherein the generating the broadcast signal frame includes:

generating a bootstrap;

generating the preamble for signaling the size information; and

generating a super-imposed payload corresponding to the time-interleaved signal.