# US 11,451,649 B2 · Broadcasting signal frame generation apparatus and method using layered divisional multiplexing

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- Number: US 11,451,649 B2
- Document ID: US11451649B2
- Status: Granted
- Kind: B2
- Application number: 16/840,565
- Filed: 2020-04-06
- Published: 2020-07-23
- Granted: 2022-09-20
- Earliest claimed: 2015-01-08
- Assignees: Electronics and Telecommunications Research Institute
- Applicants: Electronics and Telecommunications Research Institute
- Inventors: Jae-Young Lee; Heung-Mook Kim; Sung-Ik Park; Sun-Hyoung Kwon
- Web page: https://patentgrep.com/patent/US11451649B2

## CPC

- H04L 69/324: in the data link layer [OSI layer 2], e.g. HDLC
- H04L 1/0041: {Arrangements at the transmitter end}
- H04L 1/005: {Iterative decoding, including iteration between signal detection and decoding operation}
- H04L 1/0057: {Block codes (H04L1/0061, H04L1/0064 take precedence)}
- H04L 1/0058: {Block-coded modulation}
- H04L 1/007: {Unequal error protection (for format H04L1/0078; for codes per se H03M13/35)}
- H04L 1/0071: {Use of interleaving (interleaving per se H03M13/27)}
- H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH}
- H04L 69/323: in the physical layer [OSI layer 1]
- H04H 60/07: characterised by processes or methods for the generation
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- Y02D 30/70: in wireless communication networks
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04H: BROADCAST COMMUNICATION (multiplex communication H04J; pictorial communication aspects of broadcast systems H04N)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## 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 time interleaver information shared by the core layer signal and the enhanced layer signal, using the time-interleaved signal.

## Claims

### Claim 1

An apparatus for generating broadcast signal frame, comprising a processor and a memory storing at least one instruction to be executed by the processor, wherein the at least one instruction is configured to:
generate a power-reduced enhanced layer signal by reducing power of an enhanced layer signal;
generate a multiplexed signal by combining a core layer signal and the power-reduced enhanced layer signal;
generate a power reduced multiplexed signal by reducing power of the multiplexed signal to a power level corresponding to the core layer signal;
generate a time-interleaved signal by performing time-interleaving that is applied to both a core layer corresponding to the core layer signal and an enhanced layer corresponding to the enhanced layer signal; and
generate a broadcast signal frame including a preamble for signaling time interleaver information about a time interleaver operation,
wherein the time interleaver information is included in the preamble for each of the Physical Layer Pipes (PLPs),
wherein the reducing power of the multiplexed signal corresponds to a normalizing factor,
wherein the reducing power of the enhanced layer signal corresponds to a scaling factor, and
wherein the scaling factor decreases as a power reduction corresponding to the power reduced enhanced layer signal becomes lamer and the normalizing factor increases as the power reduction corresponding to the power reduced enhanced layer signal becomes larger.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein the broadcast signal frame includes:
a bootstrap;
the preamble; and
a payload corresponding to the multiplexed signal.

### Claim 3 (depends on 1)

The apparatus of claim 1, wherein the preamble includes:
a PLP identification information for identifying Physical Layer Pipes (PLPs); and
a layer information corresponding to layered division multiplexing.

### Claim 4 (depends on 3)

The apparatus of claim 3, wherein the PLP identification information and the layer information are included in the preamble as fields different from each other.

### Claim 5 (depends on 3)

The apparatus of claim 3, wherein the time interleaver information is included in the preamble for each of the Physical Layer Pipes (PLPs) inside of a NUM_PLP loop independently of the layer information.

### Claim 6 (depends on 5)

The apparatus of claim 5, wherein the preamble selectively includes an injection level information corresponding to the reducing power of the enhanced layer signal based on a result of comparing the layer information with a predetermined value.