Transitional Effect Encoding Using Decoder-Side Simulation
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Solution Overview
Problem
Transitional effects in video coding present challenges due to limited inter-frame motion, leading to inefficient compression and poor visual quality when conventional predictive-based coding is used, as viewers are less sensitive to signal noise during scene changes.
Innovation Solution
Implementing specific encoding and decoding techniques that detect transitional effects and use interpolation methods similar to frame rate up-conversion (FRUC) to simulate these effects, reducing the need for full predictive frames and minimizing bandwidth and processing overhead, while allowing for improved data compression and visual quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional predictive-based coding is used for transitional effects, then compression efficiency is maintained, but visual quality deteriorates due to signal noise during scene changes
Solution Approach 1:
Instead of applying predictive coding from the previous frame to generate the transitional effect, the patent inverts the approach by having the encoder detect transitional effects and signal them to the decoder, which then synthesizes the effect frames independently using the current and next frames. This reversal eliminates the accumulation of prediction errors that degrade visual quality while maintaining compression efficiency.
Solution Approach 2:
The patent introduces an intermediary mechanism: a transitional effect detector in the encoder that identifies when transitional effects occur and sends detection information to the decoder. This intermediary allows the decoder to switch from conventional predictive decoding to transitional effect synthesis mode, resolving the contradiction between maintaining compression and improving visual quality during transitions.
2Manufacturing precision
If full predictive frames are encoded for transitional effects, then visual quality is maintained, but data transmission volume increases
Solution Approach 1:
The patent extracts only the essential information needed to reproduce transitional effects at the decoder side. Instead of transmitting full predictive frames, the encoder detects transitional effects and extracts minimal detection information (flags, parameters) that enable the decoder to synthesize the effect frames locally. This dramatically reduces data transmission volume while maintaining visual quality.
Solution Approach 2:
The patent uses copying by transmitting references to existing frames (current and next frames) rather than encoding new predictive frames. The decoder copies pixel data from these reference frames and combines them to synthesize transitional effect frames, eliminating the need to transmit redundant predictive information while preserving visual quality.
3Loss of energy
If inter-frame compression is used for transitional effects, then compression ratio is improved, but detection precision of transitional effects becomes challenging
Solution Approach 1:
The patent applies preliminary action by having the encoder perform transitional effect detection before encoding the actual frame data. The detector analyzes frame differences and identifies transitional effects in advance, allowing the system to prepare appropriate encoding parameters and detection information. This preliminary detection step ensures high precision in identifying transitions while maintaining efficient compression.
Data Source
AI summary
This disclosure is directed to techniques for encoding and decoding transitional effects, i.e., visual video effects that are used to transition from a current scene of a multimedia sequence. According to the disclosed techniques, an encoding device detects a transitional effect associated with a multimedia sequence during the encoding of the multimedia sequence, and transmits information as part of an encoded multimedia sequence to identify the transitional effect associated with the encoded multimedia sequence to a decoder. The information may comprise metadata that can be used by the decoder to simulate or re-create the transitional effect. The decoder simulates a transitional effect in response to the information.