Video Decoder Single-Value String Matching Indexing
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Solution Overview
Problem
Current video coding standards, such as HEVC, face challenges in efficiently decoding and reconstructing video blocks, particularly in scenarios where single-value string matching modes are enabled, due to limitations in handling reference samples and color values within encoded video bitstreams.
Innovation Solution
A method and device for decoding an encoded video bitstream that determines if a single-value string matching mode is enabled, obtains an index indicating a reference sample, and uses this reference sample to determine a color value for reconstructing samples within a current block, thereby reconstructing the block using the determined color value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional video coding standards (HEVC) are used for decoding video blocks, then the decoding process can handle general video content, but the efficiency is reduced when single-value string matching modes are enabled due to limitations in handling reference samples and color values
Solution Approach 1:
The patent changes the parameter representation by introducing an index that points to reference samples instead of directly encoding full color values. This parameter transformation allows the decoder to efficiently retrieve color information from reference samples, improving decoding efficiency while reducing the complexity of handling color values in single-value string matching modes
2Measurement precision
If single-value string matching mode is enabled to improve reconstruction accuracy, then color value determination becomes more precise, but the decoding process requires additional mechanisms to obtain and utilize reference sample indices
Solution Approach 1:
The patent uses copying by storing color values from reference samples and retrieving them through indices. Instead of重新calculating or encoding full color values, the system copies reference sample values using compact index representations, achieving precise color value determination while minimizing the complexity of the required mechanisms
3Manufacturing precision
If conventional decoding methods are used, then the bitstream structure remains simple, but the reconstruction of video blocks becomes less accurate when single-value string matching is required
Solution Approach 1:
The patent applies preliminary action by pre-identifying and storing reference samples with their color values before the actual decoding of video blocks. This allows the decoder to accurately retrieve color values during reconstruction without losing information, as the reference data is prepared in advance and can be efficiently accessed through indices
Data Source
AI summary
A method of decoding an encoded video bitstream using at least one processor includes determining, based on the encoded video bitstream, that a single-value string matching mode is enabled; obtaining, from the encoded video bitstream, an index indicating a reference sample within a set including a plurality of reference samples; based on the reference sample indicated by the index, determining a color value to be used for samples included in a current string of a current block; reconstructing the samples included in the current string based on the determined color value; and reconstructing the current block using the reconstructed current string.