LCT Packet Delivery for Prompt OTT Video Streaming
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Solution Overview
Problem
Current Over The Top Video (OTT-V) content delivery using Moving Picture Experts Group-Dynamic Adaptive Streaming over Hypertext Transfer Protocol (HTTP) (MPEG-DASH) faces challenges in scalability and network resource management, particularly when delivering high-quality content to a large number of users, leading to delays and excessive network bandwidth usage due to segment-based delivery units.
Innovation Solution
The implementation of a Layered Coding Transport (LCT) packet delivery system that includes a portion of a fragment, with an LCT header containing sequence number, version, Network Time Protocol (NTP) time, and sample count start information, allowing for prompt content delivery by using portions instead of segments as file delivery units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If content delivery waits for segment generation to be completed before bulk transfer, then delivery accuracy is ensured, but delivery time increases and network bandwidth is excessively used
Solution Approach 1:
The patent applies preliminary action by delivering content in portion units before the complete segment is generated. The server divides segments into multiple portions and delivers them progressively as they become available, rather than waiting for full segment completion. This reduces delivery time and allows earlier content reception and buffering by clients while maintaining delivery accuracy through proper portion tracking and reconstruction.
Solution Approach 2:
The patent applies segmentation by dividing segments into smaller portion units. Each portion contains a subset of the samples that will ultimately form the complete segment. This segmentation enables incremental delivery and reduces the time required for bulk transfer while ensuring that the complete content can be accurately reconstructed from all delivered portions.
2Reliability
If content is delivered in segment units after waiting for segment generation, then complete content delivery is ensured, but network bandwidth is excessively used and shaping is required
Solution Approach 1:
The patent delivers portions progressively before complete segment generation is necessary. By sending content in smaller portion units as they become available, the total network bandwidth requirement is distributed over time rather than concentrated in a single bulk transfer, reducing peak bandwidth usage and eliminating the need for network shaping.
Solution Approach 2:
By segmenting content into smaller portion units, the patent reduces the size of individual delivery transactions. This allows for more efficient network utilization, lower peak bandwidth requirements, and reduced energy consumption compared to delivering complete segments in bulk after full generation.
3Productivity
If CDN is used for content delivery, then delivery capability is improved, but scalability is limited due to cost constraints
Solution Approach 1:
The patent enables scalable content delivery by dividing segments into smaller portions that can be delivered independently. This segmentation allows the system to scale more efficiently than traditional CDN approaches, as content can be delivered in manageable units without requiring expensive CDN infrastructure for every delivery scenario.
Solution Approach 2:
By delivering portions before complete segment generation, the patent improves delivery capability and reduces waiting time for clients. This approach enhances productivity without requiring expensive CDN infrastructure, thereby improving scalability while maintaining delivery performance.
4Stability of the object's composition
If segment-based delivery units are used, then content integrity is maintained, but delivery delays occur and network resource load increases
Solution Approach 1:
The patent maintains content integrity by dividing segments into portions that can be tracked and reconstructed. Each portion contains metadata and sample data that preserves the original content structure, ensuring that when all portions are received, the complete segment can be accurately reassembled without loss of content integrity.
Solution Approach 2:
The patent reduces delivery delays by delivering portions progressively before complete segment generation. This preliminary delivery of content portions allows clients to receive and buffer content earlier, reducing waiting time while maintaining content integrity through proper portion management and reconstruction.
Data Source
AI summary
The present technology relates to a transmission apparatus, a transmission method, a reception apparatus, a receiving method, and a program that enable prompt data delivery. An LCT packet including a portion which is data including part of a fragment; and an LCT header is delivered. The fragment includes a moof and an mdat including an mdat header and a sample group. The moof includes BaseMediaDecodeTime representing a presentation time of a first sample of the mdat. The LCT header includes a sequence number representing a position of the fragment; a version representing a position of the part of the fragment in the fragment; an NTP time corresponding to the BaseMediaDecodeTime; sample count start information representing a position of a first sample of the part of the fragment from a first sample of the fragment; and a moof subset that is at least part of the moof. The present technology can be applied to, for example, a case of multicast-delivering content.