Video Predictive Decoding Buffer Description Encoding
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Solution Overview
Problem
Conventional video encoding technologies redundantly transmit and receive buffer description information for reference pictures, as the same information is repeatedly encoded and decoded despite being identical for multiple target pictures, leading to inefficient use of bits.
Innovation Solution
The proposed method involves encoding and decoding buffer description information by referencing previously processed pictures, utilizing the correlation between buffer description information for different pictures to reduce redundant data transmission and storage, thereby eliminating the need to encode and decode identical information multiple times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If buffer description information is independently encoded for each target picture, then reference picture management accuracy is improved, but data transmission redundancy increases
Solution Approach 1:
The patent merges the encoding of buffer description information across multiple target pictures by identifying and combining common reference picture sets. When multiple pictures share the same reference pictures, the buffer description information is encoded once and reused, eliminating redundant transmissions while maintaining precise reference picture management for each picture.
Solution Approach 2:
The patent creates a universal buffer description information structure that can serve multiple target pictures simultaneously. By defining reference picture sets at a higher level that can be referenced by multiple pictures, the system achieves multi-functionality where a single buffer description encoding serves multiple pictures, reducing overall data transmission volume while maintaining accuracy.
2Measurement precision
If all reference pictures are stored in the buffer, then prediction accuracy is improved, but buffer memory usage increases
Solution Approach 1:
The patent applies local quality by managing reference pictures differently based on their specific usage patterns. Instead of uniformly storing all possible reference pictures, the system identifies which reference pictures are actually needed for each target picture and maintains only those in the buffer, optimizing memory usage while preserving prediction accuracy for each local context.
Solution Approach 2:
The patent implements a dynamic buffer management strategy where reference pictures are discarded from the buffer when no longer needed by any pending target picture, and recovered when required again. This allows the buffer to maintain optimal content for prediction accuracy while minimizing memory usage by removing unnecessary reference pictures.
Data Source
AI summary
The problem of the conventional technology was to repeatedly encode the same information using many bits in encoding of buffer description information about reference pictures to be used in video predictive encoding. A video predictive encoding device includes: input means to implement input of pictures constituting a video sequence; encoding means which conducts predictive coding of a target picture using, as reference pictures, pictures having been encoded and then reconstructed in the past, to generate compressed picture data; reconstruction means to decode the compressed picture data to reconstruct a reproduced picture; picture storage means to store the reproduced picture as a reference picture for encoding of a subsequent picture; and buffer management means to control the picture storage means, wherein the buffer management means controls the picture storage means, (prior to predictive encoding of the target picture), on the basis of buffer description information BD[k] related to reference pictures which are used in predictive encoding of the target picture, encodes the buffer description information BD[k] with reference to buffer description information BD[m] for a picture different from the target picture, and adds encoded data thereof to the compressed picture data.