Transmission Device Segregating Control Signals by Polarization
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Solution Overview
Problem
During the transition from a current broadcast system to a next-generation broadcast system, there is a need for more reliable transmission of transmission control signals to ensure compatibility and interference-free operation between devices compatible with both systems.
Innovation Solution
A transmission method and device that segregate transmission control signals by system, using a MIMO system to transmit current TMCC signals as horizontally polarized waves and next-generation TMCC signals as vertically polarized waves, allowing for simultaneous broadcasting of current and next-generation content without affecting existing reception devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single transmission antenna is used to broadcast both current and next-generation content, then device complexity is reduced, but transmission control signal reliability deteriorates due to interference between different system signals
Solution Approach 1:
The transmission device segments the transmission control signals by assigning different polarization directions to different system signals. Current system TMCC signals are transmitted as horizontally polarized waves, while next-generation system TMCC signals are transmitted as vertically polarized waves. This segmentation allows both systems to operate simultaneously without interference, resolving the contradiction between device simplicity and signal reliability.
Solution Approach 2:
The invention introduces polarization direction as an additional dimension for signal differentiation. By utilizing the polarization dimension (horizontal vs. vertical), the system can transmit multiple types of transmission control signals through the same physical transmission antenna without interference, effectively resolving the contradiction without increasing antenna quantity.
2Duration of action of stationary object
If current reception devices continue to operate during system transition, then service continuity is maintained, but next-generation signal transmission is interfered with by legacy control signals
Solution Approach 1:
The transmission device segments transmission control signals by system type, assigning horizontally polarized waves to current system signals and vertically polarized waves to next-generation system signals. This allows current reception devices to continue receiving service while next-generation devices receive interference-free control signals, maintaining service continuity without compromising next-generation transmission reliability.
Solution Approach 2:
The invention applies different polarization characteristics (local quality) to different types of transmission control signals. Current system signals use horizontal polarization while next-generation signals use vertical polarization, allowing each system to operate with optimized signal characteristics without mutual interference during the transition period.
3Productivity
If transmission control signals are multiplexed in the same broadcast signal, then bandwidth efficiency is improved, but signal interference increases between different system control signals
Solution Approach 1:
The invention utilizes polarization direction as an additional dimension for signal separation. By transmitting current system TMCC signals as horizontally polarized waves and next-generation system TMCC signals as vertically polarized waves within the same broadcast signal, the system achieves both bandwidth efficiency and control signal reliability through dimensional differentiation.
Solution Approach 2:
The transmission device segments the broadcast signal into different polarization components, with horizontal polarization carrying current system control signals and vertical polarization carrying next-generation system control signals. This segmentation enables efficient bandwidth utilization while preventing signal interference through polarization-based isolation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach ensures reliable transmission of control signals to both current and next-generation devices, enabling seamless transition and operation without interfering with existing systems, thus facilitating the transition to next-generation broadcasting.
Implementation Method 1
a first broadcast signal is transmitted as a horizontally polarized wave via a first transmission antenna and a second broadcast signal is transmitted as a vertically polarized wave via a second transmission antenna
Data Source
AI summary
The present technology relates to a transmission device, a transmission method, a reception device, and a reception method that make it possible to more reliably transmit a transmission control signal.Provided is a transmission device including a transmission unit that includes a first transmission control signal compatible with a first system in a first broadcast signal including a signal of a first content compatible with the first system and a signal of a second content compatible with a second system and transmits the first broadcast signal via a first transmission antenna, and includes a second transmission control signal compatible with the second system in a second broadcast signal including the signal of the second content and transmits the second broadcast signal via a second transmission antenna. The present technology can be applied to, for example, a transmission system compatible with a broadcast system such as an ISDB-T system.