Image Signal Processing Device Bandwidth Balancing
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Solution Overview
Problem
In image display systems where source devices and a display device are remotely connected via a network with limited bandwidth, compressing multiple image signals with different data amounts at the same or varying compression rates leads to degradation of image quality and real-time performance, especially when images overlap, as it results in uneven data transmission and quality changes at boundaries.
Innovation Solution
An image signal processing device with multiple compression circuits and a path/compression-rate setting circuit that divides image signals with large data amounts and assigns them to communication paths with smaller data amounts, setting a common compression rate for all circuits to maintain image quality and reduce data imbalance, thereby suppressing image degradation and real-time performance reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If image signals with different data amounts are compressed at the same compression rate, then the transmission is simplified, but the image quality of signals with smaller data amounts is further degraded
Solution Approach 1:
The patent changes the compression rate parameter dynamically based on the data amount of each image signal. The control unit determines the data amount of each image signal and adjusts the compression rate accordingly, allowing signals with larger data amounts to use higher compression rates while signals with smaller data amounts use lower compression rates to maintain quality.
2Manufacturing precision
If image signals are compressed at compression rate changed in accordance with data amounts, then image quality is improved, but image quality changes on the boundary where images overlap
Solution Approach 1:
The patent introduces a boundary detection mechanism that identifies when image signals will overlap on the display screen. When overlap is detected, the control unit adjusts the compression rates to be equal across all image signals, even if their data amounts differ. This prevents the quality inconsistency that would otherwise occur at overlap boundaries while still allowing differential compression for non-overlapping regions.
3Adaptability or versatility
If multiple image signals are transmitted via network with limited band, then remote display is enabled, but real-time performance is reduced
Solution Approach 1:
The patent dynamically adjusts compression rates based on the data amount of each image signal and the network bandwidth conditions. By optimizing the compression rate for each signal individually while considering overlap conditions, the system maximizes the use of limited network bandwidth, enabling real-time transmission of multiple image signals from remote source devices to the display device.
Data Source
AI summary
An image signal processing device receives image signals from source devices and outputs image signals via a plurality of communication paths. The image signal processing device includes a plurality of compression circuits, a transmission circuit and a path/compression-rate setting circuit. The plurality of compression circuits compress image signals to be transmitted via the plurality of communication paths. The transmission circuit outputs the image signals compressed. The path/compression-rate setting circuit, based on each data amount of the image signals received, determines a communication path for transmitting a part or the whole of each of the image signal, and sets a common compression rate for all of the plurality of compression circuits. The path/compression-rate setting circuit divides an image signal having a relatively large data amount, and assigns a part of the divided image signal to a communication path for transmitting an image signal having a relatively small data amount.