AV Device HDMI Signal Synchronization via EDID Auto-Configuration
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Solution Overview
Problem
Current audiovisual (AV) devices require complex user input to synchronize video and audio signals across multiple devices, as they need to specify which signal output ports each device is connected to for video and audio reproduction, leading to cumbersome handling.
Innovation Solution
The system acquires information on the processing times for video and audio signals from each device and uses this data to automatically set mute states and adjust signal delays, allowing the optical disk reproducing apparatus to control the synchronization of video and audio signals across multiple AV devices connected via HDMI, simplifying user handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a plurality of signal output ports are installed on the transmitting electronic device to connect multiple receiving electronic devices, then signal transmission capability is improved, but device complexity increases
Solution Approach 1:
The transmitting electronic device automatically acquires EDID information from each receiving electronic device and performs self-configuration of signal routing. The system uses automated detection and configuration processes where the device itself gathers necessary information and sets up connections without external intervention, resolving the complexity issue while maintaining multi-device transmission capability
Solution Approach 2:
The system dynamically changes signal transmission parameters based on acquired EDID information. By adjusting signal format, resolution, and routing parameters automatically according to the capabilities detected from each receiving device, the system adapts to multiple devices without requiring complex manual configuration
2Reliability
If manual configuration of signal output ports is required for each receiving electronic device, then connection accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The transmitting electronic device acquires EDID (Extended Display Identification Data) feedback from each receiving electronic device. This feedback contains information about the receiving device's capabilities, allowing the transmitting device to automatically configure appropriate signal parameters and routing, thereby maintaining connection accuracy while eliminating manual configuration requirements
Solution Approach 2:
The system performs preliminary acquisition of EDID information from all connected receiving electronic devices before actual signal transmission begins. This preliminary action allows the transmitting device to pre-configure all necessary signal parameters and routing settings, ensuring accurate connections are established automatically before operation starts
3Ease of operation
If automatic acquisition of EDID information is implemented, then ease of operation is improved, but loss of time increases due to information acquisition process
Solution Approach 1:
The transmitting electronic device acquires EDID information from all receiving electronic devices in advance, during the initial connection phase, before actual signal transmission begins. This preliminary action ensures that all necessary configuration information is available beforehand, allowing rapid switching between devices without repeated information acquisition delays during operation
Data Source
AI summary
According to one embodiment, video image and voice signals are transmitted to a plurality of electronic devices each having at least one of a video image display function and a voice reproducing function. Information indicating the fact that at least one of a video image and a voice has been set in a mute state is acquired from each of the electronic devices. Based on the information, a processing operation is applied to the video image and voice signals supplied to each of the electronic devices.