Image Encoding Apparatus Using Difference Images and Filter Coefficients
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Solution Overview
Problem
Conventional image compression methods are inefficient for encoding and decoding large capacity image data required for Ultra High Definition television (UHDTV) and 3D TV, leading to excessive data transfer.
Innovation Solution
An image encoding and decoding apparatus and method that divides input images into multiple areas, predictive-filters each area to generate predicted images, calculates difference images, selects and encodes the difference images based on data magnitude, and uses filter coefficients to regenerate the original image, reducing data transmission requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional image compression methods are used for UHDTV and 3D TV, then the full image quality is maintained, but the data transfer amount becomes excessively large
Solution Approach 1:
The patent divides the input image into multiple actual images of different areas, then generates difference images for each area. Only selected difference images and filter coefficients are encoded and transmitted, rather than encoding the entire image. This segmentation approach reduces the quantity of data to be transferred while maintaining the ability to reconstruct the full image at the decoder.
Solution Approach 2:
The patent extracts only the essential information needed for image reconstruction - specifically, selected difference images and filter coefficients - and transmits only this extracted data. The decoder uses this extracted information along with predictive filtering to regenerate the complete image, thereby reducing data transfer amount without losing essential image information.
2Quantity of substance
If all actual images are encoded and transmitted, then complete image data is available, but the encoding complexity and transmission burden increase
Solution Approach 1:
The patent extracts only the necessary components for image reconstruction - selected difference images and filter coefficients - and transmits only this extracted data. The decoder uses this extracted information along with predictive filtering to regenerate the complete image, thereby reducing data transfer amount without losing essential image information.
Solution Approach 2:
The patent changes the representation parameters by encoding difference images and filter coefficients instead of encoding complete actual images. This parameter transformation reduces the volume of encoded data while preserving the essential information needed for accurate image reconstruction through predictive filtering and addition operations.
Data Source
AI summary
Provided are an image encoding and decoding apparatus and method, which can effectively transmit a large capacity image. The image encoding apparatus generates a plurality of actual images with respect to an input image, and generates a difference image capable of predicting another actual image using one actual image, thereby effectively reducing an amount of data before encoding the input image.