Image Processing Apparatus Signal Determination Unit Non-Standard VBI Extraction
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Solution Overview
Problem
Conventional image processing apparatuses fail to extract caption data from non-standard signals without errors, leading to broken characters in display due to format differences between standard and non-standard signals.
Innovation Solution
An image processing apparatus with a signal determination unit and an additional information extractor that identifies and extracts additional information from specific intervals within the image signal, such as the vertical blanking interval, and outputs null data if no information is present, ensuring accurate extraction and display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional VBI slicing unit decodes additional information from non-standard signals using standard signal formats, then standard signal processing is maintained, but extraction errors occur and broken characters are displayed
Solution Approach 1:
The system dynamically adjusts its processing mode based on signal type detection. A signal type determination unit identifies whether the input is a standard or non-standard signal, and the additional information extraction unit switches between standard VBI slicing for standard signals and a modified extraction method for non-standard signals. This dynamic adaptation resolves the contradiction by maintaining reliability through format-appropriate processing while preserving versatility to handle both signal types.
Solution Approach 2:
The invention changes the extraction parameters based on signal format. For non-standard signals, the system modifies the decoding parameters and extraction timing compared to standard signal processing. By adjusting these parameters according to the detected signal type, the system achieves accurate extraction from both standard and non-standard signals without producing broken characters, thus resolving the reliability-versatility contradiction.
2Adaptability or versatility
If the system processes only standard signals with fixed decoding methods, then processing simplicity is maintained, but the system cannot handle non-standard signals like VCR outputs
Solution Approach 1:
The system segments the signal processing function into distinct modules: a signal type determination unit that identifies the input format, and an additional information extraction unit that applies appropriate decoding methods based on the detected type. This segmentation allows the system to handle multiple signal formats without requiring a complete redesign, thus improving adaptability while keeping the added complexity manageable through modular architecture.
Solution Approach 2:
The signal type determination unit acts as an intermediary between the input signal and the extraction processing. It analyzes the incoming signal characteristics and directs the processing flow to the appropriate decoding path. This intermediary component enables the system to adapt to different signal formats without significantly increasing overall complexity, as the intermediary simply routes processing based on detected signal type.
Data Source
AI summary
An image processing apparatus and an image processing method are provided for enhancing the picture quality of images by extracting additional information from non-standard signals without an error. A signal determination unit receives an image signal including an image interval containing an image and an additional information interval containing additional information regarding the image. A determination is made as to whether the additional information exists in the additional information interval. An additional information extractor extracts and outputs the additional information from the additional information interval, if the signal determination unit determines that the additional information exists in the additional information interval.