Frame Interpolation Prediction With Conditional Quantization Signaling
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Solution Overview
Problem
Existing video coding systems face inefficiencies in bandwidth usage and video quality due to indiscriminate signaling of quantization parameters, which can be improved by conditionally signaling these parameters based on frame-level interpolation and prediction filtering modes.
Innovation Solution
Implement methods for video encoding and decoding that conditionally signal quantization parameters based on the activation of frame-level interpolation and prediction filtering modes, deriving them from reference frames when applicable, thereby reducing the need for explicit signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If quantization parameters are always signaled in the video bitstream, then accuracy of reconstruction is improved, but bandwidth usage increases
Solution Approach 1:
The patent extracts only the necessary quantization parameters from the full set and signals them selectively. Instead of always signaling all quantization parameters, the system extracts and signals only those parameters that are actually needed for the current frame and prediction mode, thereby reducing bandwidth while maintaining necessary accuracy.
Solution Approach 2:
The patent implements dynamic signaling of quantization parameters based on frame characteristics and prediction modes. The system adaptively determines which quantization parameters to signal based on the current frame's interpolation mode, prediction type, and other contextual factors, optimizing the balance between accuracy and bandwidth usage for each frame rather than using a static approach.
2Quantity of substance
If quantization parameters are always derived at the decoder, then bandwidth efficiency is improved, but reconstruction accuracy deteriorates
Solution Approach 1:
The patent implements a dynamic approach where the system switches between signaling and deriving quantization parameters based on frame characteristics. For frames where derivation provides sufficient accuracy, the system derives parameters at the decoder to improve bandwidth efficiency. For frames requiring higher precision, the system signals the parameters explicitly, thus adaptively optimizing the trade-off between bandwidth efficiency and reconstruction accuracy.
Solution Approach 2:
The patent changes the approach to quantization parameter handling based on various parameters including frame type, prediction mode, and interpolation mode. The system adjusts whether to signal or derive quantization parameters by changing the operational mode based on these parameters, allowing optimization of both bandwidth efficiency and reconstruction accuracy for different scenarios.
3Measurement precision
If frame-level interpolation mode is enabled with prediction filtering, then video quality is improved, but processing complexity increases
Solution Approach 1:
The patent applies preliminary actions by pre-determining the quantization parameters during encoding based on the frame-level interpolation mode and prediction filtering settings. By calculating and storing the appropriate quantization parameters in advance during the encoding process, the system reduces the computational complexity required during decoding while maintaining the video quality improvements provided by frame-level interpolation and prediction filtering.
Data Source
AI summary
An example method of video coding includes receiving a video bitstream for a plurality of encoded pictures. The method also includes determining, based on a first indicator, whether a frame-level frame interpolation mode is enabled for an encoded picture and determining, based on a second indicator, whether a prediction filtering mode is enabled for the encoded picture. The method further includes determining, based on the first indicator indicating that the frame-level frame interpolation mode is enabled and the second indicator indicating that the prediction filtering mode is enabled, that the video bitstream includes a third indicator that indicates whether one or more quantization parameters for the encoded picture are signaled in the video bitstream.