Broadcast Signal PLP Framing for QoS and Mobile Reception
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Solution Overview
Problem
Current digital broadcast systems face challenges in data transmission efficiency, robustness, and network flexibility, particularly in handling large amounts of data and ensuring reliable mobile reception.
Innovation Solution
The development of an apparatus and method for transmitting and receiving broadcast signals that multiplex data across multiple services in the time domain using Physical Layer Pipes (PLPs), incorporating encoding, framing, interleaving, and waveform modulation for efficient data transmission and reception, while allowing for Quality of Service (QoS) control and robustness enhancement through MIMO systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If digital broadcast signals transmit large amounts of video/audio data and additional data, then service quality and functionality are improved, but data transmission efficiency and network robustness deteriorate
Solution Approach 1:
The patent segments broadcast data into multiple PLPs (Physical Layer Pipes) with different QoS characteristics, allowing efficient transmission of large data volumes by organizing them into manageable, independently transmittable units. This segmentation enables parallel processing and optimized resource allocation across multiple service channels.
Solution Approach 2:
The patent introduces time-domain multiplexing as an additional dimension for data transmission, allowing multiple services to share the same RF bandwidth by allocating different time slots to different PLPs. This dimensional approach increases overall system capacity without requiring additional frequency spectrum.
2Quantity of substance
If digital broadcast signals include HD images, multi-channel audio and additional services, then service quality is improved, but robustness of transmission/reception networks deteriorates
Solution Approach 1:
The patent applies local quality by assigning different QoS levels and error protection schemes to different PLPs based on their specific service requirements. Critical services receive enhanced protection while less critical services use standard protection, optimizing overall network robustness without uniformly increasing complexity.
Solution Approach 2:
The patent changes transmission parameters dynamically by adjusting modulation schemes, coding rates, and error protection levels for different PLPs based on channel conditions and service priorities. This adaptive parameter adjustment maintains robustness while supporting high-quality service delivery.
3Adaptability or versatility
If digital broadcast signals support mobile reception equipment, then network flexibility is improved, but data transmission efficiency and robustness deteriorate
Solution Approach 1:
The patent implements dynamics by enabling flexible PLP configuration and dynamic resource allocation that adapts to mobile reception requirements. The system can dynamically adjust transmission parameters, time slot allocations, and error protection levels based on mobile device capabilities and channel conditions, maintaining efficiency while supporting versatility.
4Area of stationary object
If multiple different broadcast services are multiplexed in time domain, then bandwidth utilization is improved, but system complexity increases
Solution Approach 1:
The patent achieves universality by designing a unified PLP-based framework that handles multiple broadcast services through a common transmission structure. This universal approach allows diverse services to be multiplexed using the same time-domain framework, reducing overall system complexity compared to service-specific implementations while maximizing bandwidth utilization.
Data Source
AI summary
The present invention provides a method of transmitting broadcast signals. The method includes, formatting, by an input formatting block, input streams into plural PLPs (Physical Layer Pipes); encoding, by an encoder, data in the plural PLPs; processing, by a framing and interleaving block, the encoded data in the plural PLPs to output at least one signal frame; and waveform modulating, by a waveform generation block, data in the at least one signal frame and transmitting, by the waveform generation block, broadcast signals having the waveform modulated data.