Image Signal Processing Channel Converter Parallel Power Optimization
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Solution Overview
Problem
Image signal processing devices consume high power, especially when handling high-resolution images, and require flexible configurations to adapt to diverse operating conditions, which is challenging in portable devices.
Innovation Solution
An image signal processing device with a configuration that allows parallel processing through multiple channels, including a channel converter, image signal processing core, and channel combiner, controlled by a configuration controller to manage the number of processing channels and clock frequency based on operation mode, reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If image signal processing operations are performed to generate high resolution images, then image quality is improved, but power consumption increases
Solution Approach 1:
The image signal processing device is divided into multiple independent processing channels (first image processing channel, second image processing channel, etc.), each capable of processing different processing unit signals simultaneously. This segmentation allows parallel processing of image data, improving processing efficiency and enabling flexible allocation of processing resources based on power availability while maintaining high image quality through dedicated processing paths.
Solution Approach 2:
The configuration controller dynamically adjusts the number of active processing channels and the processing clock frequency based on operation modes and power conditions. The device can switch between different operating states (e.g., using 1, 2, or 4 channels) and adjust clock frequencies to optimize the balance between image processing performance and power consumption, making the system adaptable to varying power requirements while maintaining image quality.
2Productivity
If multiple processing channels are used to process image signals in parallel, then processing efficiency is improved, but device complexity increases
Solution Approach 1:
Multiple image processing channels are designed with identical or similar functional structures, each capable of performing the same image signal processing operations (bad pixel correction, demosaicing, noise reduction, etc.). This universality allows the system to achieve parallel processing efficiency while simplifying the overall design, as the same processing logic can be replicated across channels rather than requiring complex specialized processing paths.
Solution Approach 2:
The configuration controller merges the control of multiple processing channels into a single control unit that manages channel activation and clock frequency distribution. The channel combiner merges output signals from multiple processing channels into a unified output stream. This consolidation of control and output functions reduces the overall system complexity while maintaining the benefits of parallel processing through multiple channels.
3Adaptability or versatility
If the number of processing channels is increased to handle diverse operating conditions, then adaptability is improved, but power consumption increases
Solution Approach 1:
The configuration controller provides dynamic adaptability by adjusting the number of active processing channels and clock frequencies based on different operation modes and processing requirements. The system can activate only the necessary number of channels (1, 2, or 4) depending on the input signal characteristics and power availability, enabling flexible adaptation to diverse operating conditions while minimizing power consumption by keeping inactive channels in a low-power state.
Data Source
AI summary
An image signal processing device includes a channel converter to divide an input signal stream, that includes image signals generated by a plurality of pixels, by processing units and generate a plurality of processing unit signals, an image signal processing core including a plurality of image processing channels each performing an image signal processing operation, and generating a plurality of output unit signals by receiving and processing the plurality of processing unit signals in parallel through one or more of the plurality of image processing channels, a channel combiner to combine the plurality of output unit signals and generate an output signal stream, and a configuration controller to control, according to an operation mode, at least one of the number of the plurality of processing unit signals, selection of a frequency of a processing clock signal, and combination of the plurality of output unit signals.