Transform-Domain Video Editing via Coefficient Modification
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Solution Overview
Problem
Existing video editing techniques for devices with low processing power, storage, and memory require computationally intensive decoding and re-encoding of video sequences, making them unsuitable for wireless cellular environments and inefficient for users who need to repeatedly apply editing effects.
Innovation Solution
A method and device for editing video sequences in the compressed domain, allowing for blending, sliding transitional, and logo insertion effects by modifying transform coefficients within the transform domain, reducing the need for full decoding and re-encoding, and enabling editing operations to start at any frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If spatial domain video editing is performed by decoding and re-encoding video sequences, then editing effects can be applied to video clips, but computational complexity and power consumption increase significantly
Solution Approach 1:
The patent extracts and modifies only the necessary transform coefficients from the compressed video bitstream rather than decoding the entire video sequence. This selective extraction approach allows editing effects to be applied without full decoding, significantly reducing power consumption while maintaining editing functionality.
Solution Approach 2:
The patent transitions from spatial domain editing to transform domain editing by operating on frequency coefficients instead of spatial pixels. This dimensional change allows editing operations to be performed directly on compressed data in the transform domain, eliminating the need for computationally intensive decoding and re-encoding processes.
2Ease of operation
If spatial domain video editing is performed by decoding and re-encoding video sequences, then editing effects can be applied to video clips, but processing time increases significantly
Solution Approach 1:
The patent extracts only the necessary transform coefficients from the compressed bitstream and performs editing operations directly on these extracted coefficients. This avoids the time-consuming full decoding and re-encoding process, enabling rapid application of editing effects with minimal processing time.
Solution Approach 2:
The patent performs editing operations on transform coefficients before the final encoding stage. By working in the transform domain with pre-decoded coefficients, the system eliminates the need for a separate re-encoding step, significantly reducing total processing time while maintaining editing functionality.
3Ease of operation
If spatial domain video editing is performed by decoding and re-encoding video sequences, then editing effects can be applied to video clips, but device complexity increases
Solution Approach 1:
The patent extracts and processes only the essential transform coefficients needed for editing effects rather than handling complete decoded video frames. This selective approach simplifies the device architecture by removing the need for full decoding and re-encoding pipelines, reducing device complexity while maintaining editing functionality.
Solution Approach 2:
The patent moves editing operations from the spatial domain to the transform domain, allowing effects to be applied directly to frequency coefficients in the compressed bitstream. This dimensional shift eliminates the need for complex decode-edit-encode pipelines, significantly reducing device complexity.
4Power
If transform domain editing is performed by modifying transform coefficients, then computational complexity and power consumption are reduced, but editing operations are more complex to implement
Solution Approach 1:
The patent implements a universal transform domain editing framework that can apply various editing effects (blending, transitions, logo insertion) by modifying transform coefficients using the same basic process. This multi-functional approach reduces implementation complexity compared to having separate spatial domain processing pipelines for each effect type.
Solution Approach 2:
The patent achieves different editing effects by changing parameters in the transform domain, such as modifying transform coefficients through mathematical operations. This parameter-based approach simplifies implementation compared to complex spatial domain processing, as effects are achieved through systematic coefficient modifications rather than intricate pixel-level operations.
Data Source
AI summary
A method and device for editing video data to achieve a video effect in a video sequence. From an encoder, transform coefficients of part of the video sequence are obtained. The transform coefficients are mixed with other transform coefficients in a combining module. The output of the combining module is quantized and further processed to provide an edited video bitstream. In the combining module, transform coefficients are multiplied with weighting parameters to achieve different video effects. Furthermore, logo data from a memory can be transformed into further transform coefficients for mixing in order to achieve a logo insertion effect. Moreover, prediction error and motion compensation information obtained from video data can be used to provide a reference frame, and the transform data from the reference frame can be used for mixing to achieve a blending effect.