Video Signal Multiplexing for Single-Interface Transmission
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Solution Overview
Problem
Existing technologies require separate interfaces and connectors for transmitting non-compressed and compressed video signals, leading to increased space and cable requirements, and lack efficient copyright protection mechanisms for multiple signal types.
Innovation Solution
Decoding compressed video signals to produce non-compressed signals, combining them with blanking signals, and transmitting via a common interface using standards like DVI or HDMI, while employing multiple encipherment techniques for copyright protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate interfaces are used for non-compressed and compressed video signals, then signal transmission quality is maintained, but connector space and cable requirements increase
Solution Approach 1:
The patent combines non-compressed video signals and compressed video signals into a single transmission interface. The transmission device multiplexes these different signal types onto one interface, allowing the display device to receive both signal types through a single connector, thereby reducing connector space requirements while maintaining signal transmission quality through appropriate signal processing for each type
Solution Approach 2:
The transmission interface is designed to handle multiple signal types (both non-compressed and compressed video signals) simultaneously. This multi-functional interface can adapt to different signal formats and transmission protocols, making a single connector serve multiple purposes and eliminating the need for separate dedicated connectors for each signal type
2Reliability
If separate interfaces are used for non-compressed and compressed video signals, then signal transmission is reliable, but the number of cables and connectors increases
Solution Approach 1:
The patent merges the transmission of non-compressed and compressed video signals into a single cable and interface. By multiplexing different signal types onto one transmission medium, the system reduces the total quantity of cables and connectors needed while maintaining reliable signal transmission through dedicated processing paths for each signal type within the combined interface
3Reliability
If multiple copyright protection technologies are implemented, then copyright security is improved, but system complexity increases
Solution Approach 1:
The patent implements a dynamic copyright protection system that can adaptively select and apply different protection technologies based on the type of video signal being transmitted. The system dynamically switches between protection mechanisms for non-compressed and compressed signals, providing robust copyright security while managing system complexity through conditional logic rather than permanently implementing all possible protection methods simultaneously
Data Source
AI summary
The present invention is intended to permit both real-time display of a picture represented by a non-compressed video signal on a television and display of a picture represented by a compressed video signal at any desired time by simultaneously transmitting the compressed video signal and non-compressed video signal via one interface. An STB packetizes a compressed video signal, and multiplexes the compressed video signal and a blanking signal combined with a non-compressed video signal. Thus, both the video signals are transmitted simultaneously. A picture represented by the non-compressed video signal is displayed on a television in real time. The compressed video signal is stored in a storage medium incorporated in the television, read at any user's desired time, and decoded so that a picture represented by the compressed video signal can be viewed at the user's desired time.