Video Encoding Layer Segmentation for Artifact Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing video encoding techniques, such as H.264, use lossy quantization methods that result in video artifacts like blurring and ring artifacts, especially in digital video streams with numerous edges, which are common in screen capture and screen casting applications.
Innovation Solution
The method involves identifying a base layer primarily composed of low-frequency data and an enhancement layer primarily composed of high-frequency data, with the base layer encoded using a high-quality encoding technique and the enhancement layer encoded using a second technique, allowing for improved quality and reduced artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If lossy quantization techniques are used to reduce bitrate, then bandwidth consumption is reduced, but video quality deteriorates with artifacts like blurring and ring artifacts
Solution Approach 1:
The video frame is segmented into base layer and enhancement layer portions. The base layer is encoded with high quality to preserve important visual information, while the enhancement layer uses standard compression to reduce bandwidth. This segmentation allows differential quality treatment that reduces overall artifacts while controlling bandwidth consumption.
Solution Approach 2:
Different encoding qualities are applied to different portions of the video frame. The base layer portion receives high-quality encoding to minimize artifacts in critical areas, while the enhancement layer portion uses standard lossy compression. This local quality differentiation resolves the contradiction by preserving quality where needed while reducing bandwidth where possible.
2Manufacturing precision
If high-quality encoding is applied to the entire frame, then video quality is improved, but bandwidth consumption increases
Solution Approach 1:
The frame is divided into base layer and enhancement layer portions, allowing selective application of encoding quality. Only the base layer receives high-quality encoding, while the enhancement layer uses standard compression, thereby reducing overall bandwidth consumption while maintaining essential video quality.
Solution Approach 2:
High-quality encoding is applied locally only to the base layer portion of the frame, while the enhancement layer uses standard compression. This localized quality approach maintains video quality in critical areas while reducing bandwidth consumption in less critical areas.
3Loss of energy
If standard encoding techniques are used on the entire frame, then bandwidth consumption is reduced, but encoding artifacts increase
Solution Approach 1:
By segmenting the frame into base layer and enhancement layer, the invention applies standard encoding only to the enhancement layer where artifacts are less noticeable, while protecting the base layer from severe artifacts through high-quality encoding.
Solution Approach 2:
Standard encoding with potential artifacts is applied locally only to the enhancement layer portion, while the base layer receives artifact-free high-quality encoding. This local quality differentiation minimizes overall artifact visibility while maintaining bandwidth efficiency.
Data Source
AI summary
A system, apparatus, and method for encoding and decoding a video image having a plurality of frames is disclosed. The method includes identifying in at least one frame a base layer portion primarily composed of low frequency data and an enhancement layer portion primarily composed of high frequency data. The method also includes encoding the base layer portion using a first encoding technique that encodes at a higher quality than a second encoding technique and encoding the enhancement layer portion using the second encoding technique.