Decoding Apparatus Reference Clock Extraction MMT
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Solution Overview
Problem
The conventional MMT scheme faces challenges in acquiring high-precision reference clock information due to the complexity of extracting it from multiple layers, leading to increased processing time and potential jitter in software-based extraction.
Innovation Solution
A decoding apparatus and method that identifies and extracts reference clock information by storing management information within the first transfer unit, allowing the demultiplexing apparatus to acquire it without analyzing IP packet headers, thereby reducing processing steps and enhancing speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference clock information is extracted from multiple layers (IP packet headers, MMT packets) in the conventional MMT scheme, then the reference clock information can be acquired, but the processing time increases and software-related jitter occurs
Solution Approach 1:
The patent extracts the reference clock information from the complex multi-layer structure (IP packets, MMT packets) and places it directly into the transfer unit header where it can be accessed without deep analysis. This extraction principle resolves the contradiction by removing the reference clock information from its original complex location and positioning it in an easily accessible location.
Solution Approach 2:
The patent introduces management information as an intermediary that guides the demultiplexing apparatus directly to the transfer unit containing reference clock information. This intermediary eliminates the need to analyze multiple layers sequentially, reducing processing time while maintaining accurate acquisition of the reference clock information.
2Measurement precision
If reference clock information is extracted through software-based multi-layer analysis, then the reference clock information can be obtained, but software-related jitter increases
Solution Approach 1:
The patent extracts the reference clock information from software-based multi-layer analysis and positions it in the transfer unit header, which can be accessed through simpler, more reliable demultiplexing operations. This extraction reduces the reliance on complex software processing and minimizes software-related jitter.
Solution Approach 2:
The patent creates a simplified copy of the reference clock information access path by placing management information in the transfer unit header that directly points to the relevant data. This copying approach provides a reliable, jitter-free access mechanism that bypasses the problematic software-based multi-layer analysis.
3Productivity
If the decoder generates identification information for the heading first transfer unit containing reference clock information, then the demultiplexing apparatus can acquire the information faster, but the decoder complexity increases
Solution Approach 1:
The patent applies preliminary action by having the decoder pre-generate and attach management information to the transfer unit header before the demultiplexing apparatus receives it. This preliminary preparation of identification information enables the demultiplexing apparatus to quickly locate the reference clock information without complex analysis, thus improving acquisition speed while keeping the added complexity minimal and localized to the decoder.
4Measurement precision
If the demultiplexing apparatus analyzes IP packet headers to find reference clock information, then the information can be located, but the processing steps increase
Solution Approach 1:
The patent extracts the reference clock information from the deep IP packet header structure and places it in the transfer unit header, which is processed earlier and more efficiently by the demultiplexing apparatus. This extraction maintains accurate location of the reference clock information while dramatically reducing the number of processing steps required.
Solution Approach 2:
The patent introduces management information as an intermediary in the transfer unit header that provides direct guidance to the reference clock information location. This intermediary eliminates the need for the demultiplexing apparatus to analyze IP packet headers, reducing processing steps while maintaining accurate information location.
Data Source
AI summary
A reception apparatus including a decoding apparatus and a demultiplexing apparatus for identifying a packet with clock information. The decoding apparatus receives a transfer frame, which includes one or more first transfer units obtained by multiplexing contents. A decoder in the decoding apparatus acquires the first transfer units by decoding the transfer frame, and outputs the first transfer units to the demultiplexing apparatus. The demultiplexing apparatus acquires content by demultiplexing the first transfer units. Additionally, a heading first transfer unit, which is positioned at a head within the transfer frame, contains reference clock information. The decoder generates information for identifying the heading first transfer unit and outputs the information to the demultiplexing apparatus.