Video Encoding Up-Sampling Region Handling
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Solution Overview
Problem
Existing video codecs face inefficiencies in compressing YUV 4:2:0 format image data due to the need to convert it into YUV 4:4:4 format, which results in unnecessary chroma data being encoded, leading to a lower compression ratio and increased bandwidth requirements.
Innovation Solution
A method for video encoding and decoding that involves up-sampling YUV 4:2:0 format image data, changing sample values in the up-sampling region, and encoding residue information, while predicting sample values using previously encoded and decoded values from adjacent regions, thereby minimizing the encoding of unnecessary data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If YUV 4:2:0 format image data is converted into YUV 4:4:4 format image data by performing interpolation on chroma data, then the image data can be processed by video codecs, but unnecessary chroma data are encoded resulting in lower compression ratio
Solution Approach 1:
The patent segments the chroma data into two distinct parts: original chroma data from the YUV 4:2:0 format and interpolated chroma data generated during up-sampling. By separately identifying and handling these segments, the invention encodes only the essential original chroma data while excluding redundant interpolated data, thus resolving the contradiction between codec compatibility and compression efficiency
Solution Approach 2:
The patent extracts and identifies the up-sampling region within the chroma data, separating it from the original image data. By taking out the interpolated chroma data from the encoding process and retaining only the necessary original chroma data, the system achieves both YUV 4:4:4 format compatibility and improved compression ratio
2Ease of manufacture
If YUV 4:2:0 format image data is converted into YUV 4:4:4 format image data, then the video codec can process the data, but the bandwidth requirement increases due to encoding unnecessary chroma data
Solution Approach 1:
The patent extracts the up-sampling region from the chroma data and excludes it from the encoding process. By removing the unnecessary interpolated chroma data before encoding, the system maintains YUV 4:4:4 format compatibility while reducing the quantity of data transmitted, thereby lowering bandwidth requirements
Solution Approach 2:
The patent discards the interpolated chroma data generated during up-sampling of YUV 4:2:0 format data. By deliberately discarding this redundant information that would otherwise increase bandwidth consumption, the system achieves efficient transmission while maintaining compatibility with video codecs that expect YUV 4:4:4 format input
Data Source
AI summary
A video encoding method includes: receiving an image; up-sampling the received image; and changing a sample value of an up-sampling region included in the up-sampled image and encoding the up-sampled image by using the changed sample value, wherein the up-sampling region is a region inserted into the received image by the up-sampling.