18097905. IMAGE ENCODING/DECODING METHOD AND DEVICE FOR PERFORMING PROF, AND METHOD FOR TRANSMITTING BITSTREAM simplified abstract (LG Electronics Inc.)
IMAGE ENCODING/DECODING METHOD AND DEVICE FOR PERFORMING PROF, AND METHOD FOR TRANSMITTING BITSTREAM
Organization Name
Inventor(s)
Hyeong Moon Jang of Seoul (KR)
IMAGE ENCODING/DECODING METHOD AND DEVICE FOR PERFORMING PROF, AND METHOD FOR TRANSMITTING BITSTREAM - A simplified explanation of the abstract
This abstract first appeared for US patent application 18097905 titled 'IMAGE ENCODING/DECODING METHOD AND DEVICE FOR PERFORMING PROF, AND METHOD FOR TRANSMITTING BITSTREAM
Simplified Explanation
The patent application describes a method and apparatus for encoding and decoding images. The image decoding method involves several steps:
- Deriving a prediction sample for a current block based on motion information of the block.
- Determining whether prediction refinement with optical flow (PROF) applies to the current block.
- If PROF applies, deriving a difference motion vector for each sample position in the block.
- Deriving a gradient for each sample position in the block.
- Deriving a PROF offset based on the difference motion vector and the gradient.
- Deriving a refined prediction sample for the current block based on the PROF offset.
Potential applications of this technology:
- Video compression: The image encoding/decoding method can be used in video compression algorithms to reduce the size of video files without significant loss of quality.
- Video streaming: By efficiently encoding and decoding images, this technology can improve the streaming experience by reducing buffering time and improving video quality.
- Virtual reality: The method can be used in virtual reality applications to compress and decompress high-resolution images and videos, allowing for a more immersive experience.
Problems solved by this technology:
- Efficient compression: The method allows for more efficient compression of images by utilizing motion information and optical flow to refine predictions, resulting in smaller file sizes.
- Improved video quality: By refining predictions based on motion information and gradients, the method can enhance the quality of decoded images, reducing artifacts and improving overall visual experience.
Benefits of this technology:
- Reduced file sizes: The method enables more efficient compression, resulting in smaller file sizes for images and videos, which can save storage space and reduce bandwidth requirements.
- Improved video streaming: By reducing the size of video files, this technology can improve video streaming by reducing buffering time and allowing for smoother playback.
- Enhanced visual experience: The refined predictions based on motion information and gradients can lead to higher-quality decoded images, reducing artifacts and improving overall visual experience.
Original Abstract Submitted
An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method may comprise deriving a prediction sample of a current block based on motion information of the current block, determining whether prediction refinement with optical flow (PROF) applies to the current block, deriving, based on that the PROF applies to the current block, a difference motion vector for each sample position in the current block, deriving a gradient for each sample position in the current block, deriving a PROF offset based on the difference motion vector and the gradient, and deriving a refined prediction sample for the current block based on the PROF offset.
