Partial Reference Picture Set Signaling for Video Coding

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Solution Overview

Problem

Existing video coding standards face challenges in efficiently reducing reference picture set (RPS) signal overhead, particularly in signaling and decoding processes, which leads to increased bitstream size and computational complexity.

Innovation Solution

The proposed solution involves generating partial RPS templates at the decoder side based on a received full RPS, reducing the need to send unnecessary RPS templates in the bitstream and leveraging symmetry characteristics to minimize the number of bits required for coding RPS index values, along with signaling deletions of reference pictures to optimize RPS signaling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If full RPS templates are transmitted in the bitstream, then reference picture information is complete, but bitstream size increases and signaling overhead increases

Engineering Contradiction:

Improvereference picture information completenessVSAvoidbitstream size

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

The patent extracts and transmits only the essential RPS template information needed for decoding, rather than transmitting complete RPS templates. The decoder reconstructs the full RPS by combining the transmitted template with previously decoded reference pictures, thereby reducing bitstream overhead while maintaining information completeness.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent performs preliminary reconstruction of the reference picture set at the decoder by combining received RPS templates with previously decoded reference pictures. This preliminary action eliminates the need to transmit complete RPS information, reducing signaling overhead while ensuring information availability when needed.

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If complete RPS signaling is performed, then decoding accuracy is maintained, but computational complexity increases

Engineering Contradiction:

Improvedecoding accuracyVSAvoidcomputational complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent segments the RPS signaling process into two parts: transmission of compact RPS templates and decoder-side reconstruction by combining templates with previously decoded reference pictures. This segmentation maintains decoding accuracy through complete reference information while reducing computational complexity by avoiding processing of redundant transmitted data.

Inventive Principle:

Principle #1Segmentation

3Reliability

If RPS templates are transmitted for every picture, then reference picture availability is ensured, but signaling overhead increases

Engineering Contradiction:

Improvereference picture availabilityVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent creates RPS templates that can serve multiple purposes: they provide reference picture information for the current picture and can be combined with previously decoded pictures to form complete reference sets for future pictures. This multi-functionality ensures reference picture availability while reducing the need for redundant signaling.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS8805098B2Inter reference picture set signaling and prediction on an electronic device

Publication Date: 2014.08.12 HUAWEI TECH CO LTD

AI summary

A previously signaled reference picture set (RPS) corresponding to a current picture is indicated. A first flag for a picture in the previously signaled RPS is set if the picture is to be used as a reference picture for the current picture. A bitstream is sent.