Demodulation Device Segments IP Packets for MPEG2-TS Compatibility
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Solution Overview
Problem
The transition from the MPEG2-TS method to IP transmission methods in digital broadcasting poses challenges in adapting to changes in transmission protocols, as existing hardware and software are not compatible with variable-length IP packets, leading to issues in processing and demodulation.
Innovation Solution
A demodulation device and data processing method that divide variable-length IP packets into fixed-length MPEG2-TS packets, adding a header with restoration information to facilitate seamless transition and compatibility with existing hardware and software.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If variable-length IP packets are used in the new transmission method, then adaptability to modern communication protocols is improved, but compatibility with existing fixed-length MPEG2-TS packet processing systems deteriorates
Solution Approach 1:
The patent segments variable-length IP packets into fixed-length MPEG2-TS packet units (188 bytes each). The dividing unit divides the variable-length IP packet into multiple fixed-length segments, ensuring compatibility with existing MPEG2-TS processing systems while maintaining support for the new IP transmission method.
Solution Approach 2:
The patent introduces an intermediary conversion process between IP packets and MPEG2-TS packets. The demodulation device includes a dividing unit that acts as an intermediary, converting variable-length IP packets into fixed-length MPEG2-TS packets with appropriate headers, enabling seamless integration with legacy systems.
2Reliability
If variable-length packets are divided into fixed-length packets, then compatibility with existing hardware and software is improved, but device complexity increases due to packet division and header addition
Solution Approach 1:
The patent applies segmentation by dividing the complex packet processing task into distinct functional units: a dividing unit that segments IP packets into fixed-length chunks, and an output unit that adds headers. This modular approach manages complexity while achieving compatibility.
Solution Approach 2:
The system performs self-service by automatically managing the packet division and header addition processes internally within the demodulation device, without requiring external intervention or complex external processing systems.
3Loss of information
If packet division and header addition are performed, then information restoration capability is improved, but processing time and loss of time increase
Solution Approach 1:
The patent performs preliminary actions by pre-defining fixed packet lengths (188 bytes for MPEG2-TS) and standardized header formats. This preliminary structuring enables efficient processing without requiring complex real-time decisions, reducing processing time while maintaining information restoration capability.
Data Source
AI summary
The present technology relates to a demodulation device, a processing device, a reception device, and a data processing method for more flexibly coping with change in transmission method. A demodulation device includes a demodulation unit configured to demodulate a first transmission packet obtained from a broadcast signal, and an output unit configured to output a divided packet via a predetermined interface, the divided packet being obtained by dividing the first transmission packet that is a variable-length packet used in a first transmission method into a packet length according to a second transmission packet that is a fixed-length packet used in a second transmission method and arranging the first transmission packet in a payload, and adding a header including information for restoring the first transmission packet to the payload. The present technology can be applied to, for example, a demodulation IC incorporated in a television receiver or a set top box.