Block-Based Picture File Format for Mobile Display
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Solution Overview
Problem
Conventional methods for displaying high-resolution pictures in mobile communication terminals with low-resolution display means require large memory capacity and result in initial delay and picture quality loss due to dependency on high-speed hardware and scanning of entire files.
Innovation Solution
A method involving dividing pictures into blocks, compressing block data, and storing header information and indexes in a compressed file format, allowing for efficient display on small memory devices by extracting and decoding only the necessary block data for display, using a format converting unit and picture data processing unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the whole compressed picture is decoded and stored in large memory, then the picture can be displayed, but the memory capacity requirement increases and initial delay time increases
Solution Approach 1:
The patent divides the compressed picture into multiple block units (e.g., 8x8 pixel blocks) and stores only the necessary block data in memory rather than the entire picture. This segmentation allows the terminal to store and display pictures with limited memory capacity while maintaining the ability to render high-resolution images by loading only required blocks as needed.
2Productivity
If the whole compressed picture is decoded and stored in memory, then the picture can be displayed, but the initial delay time increases
Solution Approach 1:
By segmenting the picture into blocks and storing only necessary block data, the terminal can quickly load and display the first page without waiting to decode the entire picture. Subsequent pages can be loaded as needed, significantly reducing initial delay time while maintaining full picture display capability.
Solution Approach 2:
The patent pre-divides and pre-stores compressed picture data into block units with index information before display is needed. This preliminary organization of data allows the terminal to quickly access and display specific blocks without performing time-consuming full-picture decoding at display time.
3Quantity of substance
If the picture is compressed in block units, then the data can be stored efficiently, but the dependency of data between blocks may cause some compressed streams to not be restorable
Solution Approach 1:
The patent segments the picture into blocks while maintaining the original compression structure. Each block is stored with its position information in an index, allowing selective retrieval. This approach preserves the compression efficiency benefits while enabling reliable restoration of specific blocks without requiring the entire compressed stream.
4Ease of operation
If the picture resolution is converted to match the terminal display resolution, then the picture can be displayed, but the picture quality is seriously damaged and lost
Solution Approach 1:
The patent segments the high-resolution picture into blocks and stores them with index information. When displaying, the terminal can selectively load and render only the necessary blocks at their original high resolution, then composite them appropriately for the display device. This maintains picture quality while ensuring display compatibility through selective block rendering rather than full-resolution conversion.
Data Source
AI summary
The present invention discloses a method for displaying a high resolution picture in a mobile communication terminal having a low resolution display means, the mobile communication terminal and a system for converting a picture file format therefor. The method for displaying the high resolution picture in the mobile communication terminal includes the steps of: dividing picture data into a plurality of unit blocks, and converting the picture data into a picture file format including the plurality of unit block picture data and indexes for access to each of the block picture data; extracting minimum unit block picture data composing a partial picture which will be initially outputted to a display unit from the picture file by using the index information of the picture file format, and outputting the initial picture; and extracting the corresponding unit block picture data from the picture file in the movement direction by using the index information of the picture file format in accordance with generation of scroll action during the display of the picture, and outputting the position-moved picture.