Method and image processing device for adding an overlay to a video sequence
By detecting updates to the overlay content and representing the overlay using either compressed or uncompressed formats, the problem of high memory bandwidth consumption is solved, achieving memory savings when the overlay content remains unchanged.
CN118212308BActive Publication Date: 2026-06-23AXIS
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- AXIS
- Filing Date
- 2023-12-15
- Publication Date
- 2026-06-23
AI Technical Summary
Technical Problem
In existing technologies, when graphic overlays are applied to video frame sequences, memory bandwidth consumption is significant, especially when the overlay content is frequently updated.
Method used
By detecting whether the overlay content is updated within a certain period of time, if it is not updated, a compressed format (such as RLE encoding) is used to represent the overlay; if it is updated, an uncompressed format (such as raster format) is used to reduce memory bandwidth consumption.
Benefits of technology
Using a compressed format to represent the overlay while keeping the overlay content unchanged reduces memory bandwidth consumption and improves memory utilization efficiency.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN118212308B_ABST
Abstract
A method for adding an overlay to a video sequence, the method comprising: determining (501) whether content of the overlay is updated within a time period; determining (502) whether to provide a second representation of the overlay in a compressed format based on the determination of whether the content of the overlay is updated within the time period, wherein the second representation is determined to be provided in response to a determination that the content of the overlay is not updated within the time period, and wherein the second representation of the overlay is determined not to be provided in response to a determination that the content of the overlay is updated within the time period; and when the second representation of the overlay has been provided, adding (504) the second representation of the overlay to a video frame of the video sequence if a compression ratio of the second representation of the overlay relative to a first representation of the overlay in an uncompressed format is higher than a threshold, and adding the first representation of the overlay to the video frame if the compression ratio is lower than the threshold, and when the second representation of the overlay has not been provided, adding (504) an uncompressed representation of the overlay to the video frame.
Need to check novelty before this filing date? Find Prior Art