Video Encoding Mode Selection Using Prediction Correlation
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Solution Overview
Problem
Current transform encoding technologies face complexity and inefficiency in selecting the optimal transformation mode for video encoding, leading to increased complexity and reduced compression and encoding efficiency due to the need to encode mode selection information in the code stream.
Innovation Solution
The method involves obtaining and selecting an optimal transformation mode based on prediction modes, simplifying the candidate transformation mode set, and performing transformation operations using the selected mode, while encoding an index of the optimal transformation mode in the code stream to minimize distortion and encoding bits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If three transformation modes (square block, latitudinal rectangular block, longitudinal rectangular block) are selected and mode selection information is encoded in the code stream, then transformation accuracy is improved, but encoding complexity and device complexity increase
Solution Approach 1:
The patent extracts and removes the mode selection information encoding step from the transformation process. By directly using the prediction mode to determine the transformation mode without encoding the selection information, the patent eliminates the complexity of encoding and transmitting mode selection data while maintaining the benefits of using multiple transformation modes for different block types
Solution Approach 2:
The patent makes the prediction mode serve a dual function: it both predicts the current block and determines the transformation mode. This multi-functionality eliminates the need for separate mode selection information, reducing encoding complexity while maintaining the ability to adapt transformation modes to different content characteristics
2Manufacturing precision
If mode selection information is encoded in the code stream, then optimal transformation can be achieved, but compression efficiency deteriorates
Solution Approach 1:
The patent removes the encoding of mode selection information from the code stream entirely. By using the prediction mode (which is already encoded for prediction purposes) to determine the transformation mode, the patent avoids adding redundant information to the code stream, thereby maintaining compression efficiency while still achieving optimal transformation selection
3Adaptability or versatility
If three scanning modes are selected at the encoding end, then processing flexibility is improved, but encoding complexity increases
Solution Approach 1:
The patent makes the prediction mode serve multiple functions: it provides prediction for the current block and simultaneously determines both the transformation mode and scanning mode. This eliminates the need for separate mode selection processes, reducing encoding complexity while maintaining the flexibility to adapt to different content characteristics
Solution Approach 2:
The patent merges the prediction mode selection with the transformation mode and scanning mode selection into a single unified process. By combining these previously separate decisions into one unified mode selection based on prediction, the patent reduces the complexity of the encoding end while maintaining processing flexibility
Data Source
AI summary
Embodiments of the present invention disclose a transformation mode encoding and decoding method and apparatus. A correlation between the prediction mode and the transformation mode is used, and an optimal transformation mode candidate set is simplified, thereby saving resources when an index of an optimal transformation mode is encoded in encoding header information. In addition, encoding efficiency is higher when an encoding end elects a transformation mode.