PIP Processing Circuit Scaling Secondary Image
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Solution Overview
Problem
Conventional PIP processing apparatuses require two processing circuits and redundant memory bandwidth to display secondary images within a main image frame, leading to increased product size and cost.
Innovation Solution
A PIP processing apparatus with a scaling circuit, memory circuit, first selecting circuit, and shared processing circuit that scales down secondary images and selectively processes either the scaled-down or main images based on an image selecting signal, reducing memory access and circuitry needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two separate processing circuits are used to process main image and secondary image respectively, then image processing quality is improved, but device complexity and product cost increase
Solution Approach 1:
The patent combines the processing functions for both main image and secondary image into a single shared processing circuit. The circuit selectively processes either the main image or the scaled-down secondary image based on control signals, eliminating the need for two separate processing circuits while maintaining image processing quality.
Solution Approach 2:
The shared processing circuit is designed to perform multiple functions: it can process the main image when needed, and it can process the scaled-down secondary image when needed. This multi-functional design allows one circuit to replace what would traditionally require two separate circuits.
2Productivity
If redundant memory bandwidth is allocated for simultaneous access of main image and secondary image, then image display performance is improved, but memory bandwidth usage and cost increase
Solution Approach 1:
The secondary image is pre-scaled down to the appropriate size before being stored in memory. This preliminary scaling action ensures that when the secondary image needs to be displayed, it can be directly accessed from memory without requiring additional bandwidth for real-time scaling operations, thereby reducing memory bandwidth requirements.
3Quantity of substance
If secondary image is scaled down before storage, then memory bandwidth usage is reduced, but additional scaling circuitry is required
Solution Approach 1:
The scaling function is merged with the existing shared processing circuit. The same processing circuit that selectively processes main image and secondary image also performs the scaling operation for the secondary image. This integration eliminates the need for a separate scaling circuit, reducing overall device complexity while enabling reduced memory bandwidth usage.
Data Source
AI summary
A PIP (Picture In Picture) processing apparatus processes a main image and a secondary image and includes a scaling circuit, a memory circuit, a first selecting circuit and a processing circuit. The scaling circuit scales down the secondary image to output a scaled-down secondary image. The memory circuit stores the main image and the scaled-down secondary image. The first selecting circuit is connected with a controlling circuit to receive an image selecting signal, and is connected with the memory circuit to select the scaled-down secondary image or the main image as an output according to the image selecting signal. The processing circuit is connected with the first selecting circuit to process the main image or the scaled-down image.