Diff Image Subtitle Delivery Reduces Transmission Data Rate
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Solution Overview
Problem
Existing subtitle delivery systems face challenges in processing high transmission data rates of subtitle images, particularly for live closed captions, which can overwhelm client devices with large amounts of content.
Innovation Solution
Generating and transmitting diff images instead of full subtitle images, along with display metadata, to reduce processing demands on client devices, where diff images contain only the changed content between sequential subtitle images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If full subtitle images are transmitted to ensure complete content delivery, then information completeness is improved, but transmission data rate increases and processing burden worsens
Solution Approach 1:
The patent extracts only the changed portions (diff images) from the full subtitle images for transmission. Instead of sending complete subtitle images containing all content, the system identifies and transmits only the specific regions that have changed between sequential frames, thereby reducing transmission data while preserving all necessary information updates.
Solution Approach 2:
The patent segments the subtitle image into multiple regions and transmits only the segments that contain changes. By dividing the full subtitle image into manageable portions and selectively transmitting only the changed segments along with their position metadata, the system reduces overall data transmission while maintaining complete information delivery.
2Loss of information
If full subtitle images are transmitted to ensure complete content delivery, then information completeness is improved, but client device processing burden increases
Solution Approach 1:
The patent extracts only the changed portions (diff images) from the full subtitle images for transmission. Instead of sending complete subtitle images containing all content, the system identifies and transmits only the specific regions that have changed between sequential frames, thereby reducing transmission data while preserving all necessary information updates.
Solution Approach 2:
The patent segments the subtitle image into multiple regions and transmits only the segments that contain changes. By dividing the full subtitle image into manageable portions and selectively transmitting only the changed segments along with their position metadata, the system reduces overall data transmission while maintaining complete information delivery.
3Quantity of substance
If diff images are transmitted to reduce data rate, then transmission efficiency is improved, but system complexity increases due to diff generation and metadata management
Solution Approach 1:
The patent introduces an intermediary component (the server or processing device) that performs the diff image generation and metadata creation. This intermediary handles the complex tasks of comparing sequential subtitle images, identifying changes, generating diff images, and creating position metadata, thereby offloading system complexity from the client device while maintaining transmission efficiency benefits.
4Quantity of substance
If diff images are transmitted to reduce data rate, then transmission efficiency is improved, but real-time processing capability is challenged by latency
Solution Approach 1:
The patent performs preliminary actions by pre-processing the subtitle images to identify changes and generate diff images before transmission. By comparing sequential frames in advance and preparing only the changed portions for transmission, the system reduces the amount of data that needs to be processed in real-time at the client device, thereby reducing latency and improving real-time processing capability.
Data Source
AI summary
Various methods, systems, and electronic devices include delivery of sequential subtitle images to a client device. To that end, a method includes obtaining a plurality of sequential subtitle images including a first sequential subtitle image and a second sequential subtitle image. The method includes generating a diff image by comparing the first sequential subtitle image against the second sequential subtitle image. The diff image includes content that is absent from the first sequential subtitle image and present in the second sequential subtitle image. The method includes sending, to the client device, the diff image and display metadata associated with the diff image. The metadata may include a temporal indicator that indicates a display time or display duration of the diff image, and may include a position indicator that indicates a display position of the diff image.