FLUTE Multicast Content Supply Device for Delay-Free Streaming
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Solution Overview
Problem
In adaptive streaming using DASH, the delay in delivering file transmission units can cause buffering and negatively affect real-time content reproduction, especially when the bandwidth is insufficient for bulk transfer of fragmented MP4 streams.
Innovation Solution
A content supply device generates and FLUTE-multicasts file transmission units in smaller, sequentially deliverable units by subdividing first data units into second data units, adding a version attribute and NTP Time to the file transmission units, allowing for efficient transmission without delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bulk transfer of fragmented MP4 streams is used, then transmission efficiency is improved, but buffering occurs when bandwidth is insufficient
Solution Approach 1:
The patent segments the fragmented MP4 stream into multiple smaller file transmission units (FTUs) that can be transmitted sequentially. Each FTU contains a portion of the original fragmented MP4 data, allowing the system to maintain transmission efficiency while reducing buffering issues when bandwidth is limited. The segmentation enables progressive delivery of content chunks that can be buffered and played back in real-time.
2Reliability
If smaller file transmission units are used, then buffering is reduced, but transmission time increases
Solution Approach 1:
The patent implements periodic transmission of file transmission units, where smaller FTUs are sent in a structured sequence with regular intervals. This periodic action allows the receiver to process and buffer data at a manageable rate, reducing buffering issues while maintaining efficient transmission through the structured, rhythmic delivery pattern rather than ad-hoc transmission.
Solution Approach 2:
The patent prepares and structures file transmission units in advance with proper formatting and metadata (including version attributes and NTP time stamps). This preliminary action ensures that when transmission occurs, the data is ready for immediate processing and buffering, reducing overall transmission time while maintaining reliability through pre-validated data structures.
3Reliability
If version attribute and NTP Time are added to file transmission units, then real-time synchronization is improved, but data structure complexity increases
Solution Approach 1:
The patent incorporates version attributes and NTP time stamps into a universal file transmission unit structure that serves multiple functions: real-time synchronization, version control, and data integrity verification. This multi-functional approach improves real-time synchronization while managing complexity by consolidating these features into a standardized FTU format that can be processed uniformly by both transmitter and receiver.
Data Source
AI summary
The present disclosure relates to a content supply device, a content supply method, a program, a terminal device, and a content supply system that make it possible to transmit a file transmission unit of a segment stream without delay. According to the present disclosure, there is provided a content supply device that multicast-delivers a fragment stream of content, the content supply device including: a fragment stream generating unit configured to generate the fragment stream based on source data of the content; and a delivering unit configured to generate a file transmission unit in units of second data units by delimiting the generated fragment stream into first data units that are randomly accessible and subdividing the first data unit into the second data units and FLUTE-multicast-deliver the file transmission unit. The present disclosure can be applied to a system in which content is FLUTE-multicast-delivered.