Delta Commands for Video Pixel Bandwidth Reduction
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Solution Overview
Problem
Current video compression systems face inefficiencies in bandwidth usage during the transmission of video frame buffers, particularly due to the need to send full pixel data for new pixels, which increases bandwidth requirements and reduces compression efficiency.
Innovation Solution
The proposed Video Compression System employs a combination of directional algorithm concepts, including delta commands and color reduction, to minimize bandwidth usage by only transmitting differences between pixels and reducing color precision, thereby optimizing data transmission across an extension link.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If full precision pixel data is transmitted for new pixels, then color accuracy is maintained, but bandwidth requirements increase
Solution Approach 1:
The patent extracts only the essential information needed for pixel representation by using delta commands that transmit color differences rather than full precision values. This selective extraction of critical data (color deltas) maintains perceptual accuracy while reducing bandwidth consumption.
Solution Approach 2:
The patent changes the parameter representation from full precision absolute color values to lower precision delta values. By transmitting color differences (deltas) instead of complete color information, the system achieves comparable visual quality with reduced data transmission requirements.
2Productivity
If color depth is reduced to minimize bandwidth usage, then transmission efficiency improves, but color precision deteriorates
Solution Approach 1:
The patent uses COPY_LEFT and COPY_ABOVE commands to replicate existing pixel values across multiple positions. This copying mechanism maintains color precision for repeated patterns without requiring repeated transmission, thereby improving transmission efficiency while preserving color accuracy.
Solution Approach 2:
The patent dynamically adjusts color precision requirements by using delta commands that only transmit color differences when necessary. This selective parameter change approach maintains high color precision where needed while reducing precision requirements for identical or similar pixels, optimizing the trade-off between transmission efficiency and color precision.
3Quantity of substance
If directional encoding commands are used to reduce data transmission, then bandwidth usage decreases, but decoding complexity increases
Solution Approach 1:
The patent segments the pixel data transmission into distinct command types (COPY_LEFT, COPY_ABOVE, DELTA, NEW_PIXEL) that can be independently decoded. This segmentation allows the decoder to process each command type through simple, dedicated logic paths, reducing overall decoding complexity despite the variety of encoding modes.
Solution Approach 2:
The encoding scheme is designed to be self-decoding through explicit command markers and state machine logic. Each command type contains sufficient information for its own interpretation, and the decoder uses simple state transitions based on received commands, minimizing the need for complex external control logic.
Data Source
AI summary
A video compression system compresses video frames comprising pixels defined by n-bit color values. Encoder of video compression system determines the difference between a current pixel value and a plurality reference pixel values. Encoder sends difference value to decoder. Decoder determines current pixel value by adjusting a reference pixel color value by delta value.