Multi-Layer Video Decoding Identical DPB Operation
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Solution Overview
Problem
Existing multi-layer video encoding and decoding methods face inefficiencies in managing decoded picture buffers and transmitting reference picture information, particularly when dealing with scalable and multi-view video compression standards like SVC and MVC, where the operation of decoded picture buffers across layers is not identical.
Innovation Solution
A method and apparatus for predicting and decoding multi-layer video by determining whether decoded picture buffers (DPBs) across layers operate identically, and if so, using information from one layer to manage and decode the other layers, including deleting or marking pictures based on reference picture sets and temporal sub-layer ordering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If decoded picture buffer information is independently managed for each layer in multi-layer video decoding, then decoding accuracy is maintained, but decoding complexity and processing time increase
Solution Approach 1:
The patent applies universality by making the second DPB operate identically to the first DPB, allowing the same buffer management rules, reference picture sets, and deletion operations to be applied across multiple layers. This reduces decoding complexity while maintaining accuracy because the decoder can reuse the same control logic and data structures for all layers that share identical operation characteristics.
Solution Approach 2:
The patent changes the operational parameters of the second DPB to match the first DPB by using identical reference picture set configurations, temporal sub-layer ordering, and picture deletion rules. This parameter alignment allows layers with identical operational characteristics to share buffer management strategies, reducing overall system complexity.
2Measurement precision
If decoded picture buffer information is independently managed for each layer, then layer-specific decoding accuracy is maintained, but data transmission overhead increases
Solution Approach 1:
The patent merges the management of DPB information across layers by making the second DPB operate identically to the first. Instead of transmitting separate reference picture set configurations, temporal ordering information, and buffer management parameters for each layer, the system transmits this information once and reuses it across multiple layers, significantly reducing data transmission overhead.
Solution Approach 2:
The patent uses copying by having the second DPB replicate the operational characteristics of the first DPB. The reference picture sets, temporal sub-layer ordering, and buffer management rules are copied from the first layer's configuration, eliminating the need to transmit redundant information for the second layer while maintaining layer-specific decoding accuracy through the copied parameters.
3Adaptability or versatility
If separate DPB management is used for each layer, then layer independence is maintained, but processing efficiency decreases
Solution Approach 1:
The patent applies universality by implementing identical DPB operation across multiple layers, allowing a single set of buffer management rules and reference picture configurations to serve multiple layers simultaneously. This universal approach maintains layer independence in terms of functional separation while dramatically improving processing efficiency through shared management logic.
4Device complexity
If identical DPB operation is used across layers, then management complexity is reduced, but adaptability to layer-specific requirements decreases
Solution Approach 1:
The patent applies dynamics by allowing the system to adaptively determine whether layers should operate with identical or independent DPB configurations. The decoder can dynamically select the appropriate mode based on the specific video content and layer characteristics, providing both simplified identical operation when applicable and layer-specific independence when required.
Data Source
AI summary
Apparatuses and methods configured to encode and decode multi-layer video are provided. A method of prediction-decoding a multi-layer video includes obtaining information indicating whether a decoded picture buffer (DPB) storing a first layer and a DPB storing a second layer operate identically, and operating the DPB storing the second layer based on the obtained information.