Video Signal Processing Apparatus Sampling Phase Difference Estimation
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Solution Overview
Problem
Conventional methods for achieving high-resolution video signals require a large number of frames and complex signal processing, making it difficult to obtain high resolution for moving pictures, such as television broadcast signals, due to the need for multiple frames to remove aliasing components.
Innovation Solution
The method involves estimating sampling phase differences between input video frames, performing motion compensation, and using phase shifting and coefficient multiplication to remove aliasing components, allowing for high-resolution video signal processing with fewer frames, using a video signal processing apparatus that includes motion estimation, phase shifting, and aliasing component removal portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional broadband interpolation and weighted sum methods are used to achieve high resolution, then resolution is improved, but the number of frames required and device complexity increase significantly
Solution Approach 1:
The invention changes the processing approach from conventional broadband interpolation to a method based on sampling phase difference estimation. By estimating the sampling phase difference between frames and using this parameter to guide motion compensation and pixel generation, the system achieves high resolution with fewer frames and reduced processing complexity
Solution Approach 2:
The invention extracts and utilizes the sampling phase difference information from input frames as a key parameter. This extracted parameter enables the system to determine motion compensation amounts and generate high-resolution pixels without requiring complex broadband interpolation or multiple frame processing
2Manufacturing precision
If multiple frames are used for composition to remove aliasing components, then video resolution is improved, but the amount of frame memory and processing time increase
Solution Approach 1:
The invention changes from processing multiple frames to processing a reduced number of frames by utilizing sampling phase difference estimation. This parameter-based approach allows the system to achieve aliasing removal and high resolution effects with fewer frames, reducing memory requirements and processing time
Solution Approach 2:
The invention performs preliminary estimation of sampling phase differences between frames before conducting motion compensation and pixel generation. This preliminary action enables the system to efficiently process fewer frames while still achieving the desired high resolution and aliasing removal
3Manufacturing precision
If conventional motion estimation and broadband interpolation are applied, then high resolution is achieved, but processing speed and efficiency decrease
Solution Approach 1:
The invention changes the processing methodology by introducing sampling phase difference estimation as a guiding parameter. This parameter enables more efficient motion compensation and pixel generation compared to conventional broadband interpolation, improving processing speed while maintaining high resolution output
Solution Approach 2:
The invention performs preliminary sampling phase difference estimation before the main processing steps. This preliminary action provides essential information that streamlines subsequent motion compensation and pixel generation operations, improving overall processing efficiency
Data Source
AI summary
A video signal processing apparatus, for achieving high resolution of a video signal, in particular, the video signal of moving pictures, preferably, comprises a motion estimation portion (101) for estimating a sampling phase difference with using video data on an input video frame as a reference and each video data on other input video frame, a motion compensation/up-rate portion (115) for compensating motion of the video data of the each input video frame with using information of said sampling phase difference, as well as, to increase the number of pixels to n times, a phase shift portion (116) for shifting the video data of each of the video frames, the pixel number of which is increased, by a predetermined amount, a coefficient determining portion, which is configured to determine a coefficient with using information of said sampling phase difference; and an aliasing component removal portion (117) for removing (n−1) pieces of aliasing components, by adding each of video data in front and back of said phase shifting after multiplying them by said coefficient, thereby to provide an output.