SVC Operation Point Identification via Layer-ID Mapping
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Solution Overview
Problem
Existing SVC technologies face limitations in uniquely identifying operation points, especially in file formats other than SVC, and struggle with long SDP descriptions that increase streaming setup time and initial delay, particularly in live streaming applications without file formats.
Innovation Solution
Generating and sending SDP messages with unique IDs and characteristic parameters for each operation point, using layer-IDs or track-IDs to uniquely identify operation points, and optimizing SDP descriptions to shorten the length and clarify the mapping relationship between operation points and parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SDP descriptions include all operation point parameters for each scenario, then completeness of operation point identification is improved, but SDP description length increases causing longer streaming setup time and initial delay
Solution Approach 1:
The patent segments the SDP description by separating operation point identification into two parts: a compact unique ID (such as track-ID or layer-ID) for each operation point, and a separate parameter mapping section. This segmentation allows the SDP to include complete operation point information while maintaining a shorter overall description length, thus reducing streaming setup time and initial delay while preserving identification completeness.
2Adaptability or versatility
If SVC streams support multiple file formats and scenarios, then adaptability of SVC technology is improved, but complexity of identifying operation points increases
Solution Approach 1:
The patent introduces a universal identification mechanism that works across multiple file formats and scenarios. By defining a standard unique ID (such as track-ID or layer-ID) and a standardized parameter mapping approach, the system achieves format-agnostic operation point identification. This universal approach allows SVC streams to be adapted to different file formats without increasing identification complexity, as the same identification mechanism applies universally across all scenarios.
Data Source
AI summary
A method for selecting an SVC operation point is provided, which includes: receiving an SDP message, where the SDP message includes a unique ID of each operation point and characteristic parameters of at least one operation point of multiple operation points, where the unique ID includes a layer-ID; selecting an operation point from the multiple operation points; and sending a session setup request that includes the unique ID of the selected operation point. A server device and a client device are also provided. Through the method and the device, each operation point may be uniquely identified, and the mapping relationship between each operation point and characteristic parameters is clarified.