Gamma Correction Negotiation in Video Terminals
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Solution Overview
Problem
Current methods lack a general solution for correcting Gamma characteristics in two-party video communication, leading to nonlinearity issues due to the complexity of cascaded Gamma elements and varying terminal characteristics, resulting in suboptimal user experience.
Innovation Solution
A method and system for negotiating and selecting the appropriate terminal to perform Gamma characteristics correction based on processing capabilities, using a central server for managing and updating Gamma characteristics information to establish a comprehensive equivalent model for precise correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If Gamma correction is performed at every terminal in the communication chain, then the Gamma characteristics can be corrected, but the system complexity and processing overhead increase significantly
Solution Approach 1:
The patent extracts the Gamma correction function from all terminals and concentrates it at a specific correction terminal. The non-correction terminals only perform encoding/decoding while the correction terminal handles both correction and encoding/decoding. This extraction principle resolves the contradiction by eliminating redundant correction operations at multiple terminals while maintaining correction precision at the designated terminal.
Solution Approach 2:
The correction terminal performs multiple functions: it acts as both a correction device and an encoding/decoding terminal. By making one terminal universal (handling both correction and standard communication functions), the system avoids the complexity of multiple dedicated correction devices while maintaining correction effectiveness.
2Adaptability or versatility
If Gamma characteristics information is exchanged between all terminals, then the correction can be adapted to each terminal's specific characteristics, but the negotiation overhead and communication complexity increase
Solution Approach 1:
The patent extracts the Gamma characteristics information exchange from all terminal pairs and concentrates it only between the correction terminal and the non-correction terminals. This extraction reduces the number of negotiation messages from O(n²) in a multi-party system to O(n) where n is the number of non-correction terminals, significantly reducing negotiation overhead while maintaining adaptability.
Solution Approach 2:
The correction terminal acts as an intermediary that receives Gamma characteristics information from non-correction terminals and uses this information to perform correction. This intermediary role centralizes the adaptation process, allowing each terminal to exchange information only with the correction terminal rather than with every other terminal, reducing communication complexity.
3Productivity
If a central server manages Gamma characteristics information for all terminals, then the information can be centralized and updated efficiently, but the server becomes a single point of failure and increases system dependency
Solution Approach 1:
The correction terminal serves as a distributed intermediary that performs the information management functions previously centralized in a server. It receives, stores, and distributes Gamma characteristics information locally, eliminating the single point of failure while maintaining efficient information management. This distributed approach preserves productivity through localized processing while improving reliability by removing central dependency.
Data Source
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AI summary
The invention discloses a technology of video communication, especially a method, a application system and a terminal for correcting the gamma characteristic of the interactive communicating signal between terminals, for solving the problem in prior art that there is no universal correcting method in any number of gamma characteristic processes of the two sides communication. The method includes the following steps of: before the communication or in the process of establishing the communication, the both sides of communication negotiate to decide whether to perform correction according to the correcting ability information of the both sides of communication, if perform correction, choose one of them as the correction performing terminal to correct the gamma characteristic of the interactive signal between the both sides, or both of them as the correction performing terminals to correct the signal from the other side respectively; or not to perform correction, therein, the both sides of communication could negotiate directly or negotiate to arbitrate through a central server. When using the central server to arbitrate, the correction system includes correcting module and central server linked to the correcting module set in the terminal.