Reception Device Packet Division Analysis for Digital Broadcasting
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Solution Overview
Problem
Existing methods struggle to quickly output packets in digital broadcasting systems, particularly when packet division information is included as transmission control information, leading to delays in channel switching and packet processing.
Innovation Solution
A reception device and data processing method that analyze transmission control information and multiplexed streams to set packet division information dynamically, allowing for immediate division of packets without waiting for two frames to elapse, using either pre-set information or analysis results from the transmission control information or multiplexed streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If packet division information is held in advance as preset information, then initial rising time is shortened, but information difficult to be predicted in advance (information changing for each frame) cannot be held as preset information
Solution Approach 1:
The patent applies preliminary action by holding transmission control information (including packet division information) in advance as preset information before channel switching occurs. This allows the reception device to immediately use the preset packet division information when switching channels, shortening the initial rising time without needing to wait for frame-by-frame analysis.
Solution Approach 2:
The patent implements dynamics by enabling the reception device to switch between using preset packet division information (for fast initial response) and analyzing actual multiplexed streams (for accurate ongoing packet division). This dynamic approach allows the system to adapt to changing information while maintaining speed.
2Measurement precision
If packet division information is obtained by analyzing multiplexed stream in real-time, then accuracy is improved, but time to output packets increases
Solution Approach 1:
The patent applies preliminary action by pre-analyzing and storing packet division information from multiplexed streams before channel switching. This preset information is then immediately usable when switching occurs, eliminating the need for real-time analysis during channel changes and thus reducing packet output time while maintaining accuracy.
Solution Approach 2:
The patent implements skipping by allowing the reception device to bypass the time-consuming real-time analysis step during channel switching by using previously prepared packet division information. This rushes through the initial packet processing phase without sacrificing the accuracy that would come from thorough analysis.
3Productivity
If transmission control information is used for packet division, then processing speed is improved, but reliability decreases when information changes for each frame
Solution Approach 1:
The patent applies feedback by continuously monitoring whether preset packet division information remains valid during reception. When changes are detected (indicating the preset information is no longer reliable), the system switches to analyzing actual multiplexed streams to obtain updated packet division information, thus maintaining reliability while preserving speed benefits.
Solution Approach 2:
The patent implements dynamics by creating a dynamic system that adapts its packet division approach based on current conditions. The system transitions from using preset transmission control information (fast but less reliable for changing data) to real-time stream analysis (slower but more reliable) when frame changes are detected, optimizing both speed and reliability.
Data Source
AI summary
The present technology relates to a reception device, a data processing method, and a transmission/reception system capable of shortening time to output a packet. The reception device receives a transmission signal obtained by processing a multiplexed stream including a plurality of packets, analyzes transmission control information for controlling transmission of the transmission signal, decodes the transmission signal on the basis of an analysis result of the transmission control information, analyzes the multiplexed stream obtained by decoding the transmission signal and sets packet division information for dividing the packets from the multiplexed stream, the packet division information according to at least one of the analysis result of the transmission control information or an analysis result of the multiplexed stream, and divides the multiplexed stream into the packets on the basis of the set packet division information. The present technology is applicable to a receiver of digital broadcasting, for example.