Communication Verification Repeater for HDCP Transmission Range
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication verification systems, such as those using High-Bandwidth Digital Content Protection (HDCP) technology, are limited in transmission distance due to time constraints in verifying the authorization of receiving units, which restricts the range of data transmission.
Innovation Solution
A communication verification system that employs a repeater device to set the local transmitting unit to a first computing mode and the remote receiving unit to a second computing mode, allowing the repeater device to receive and store computation results, thereby extending the transmission range while ensuring timely verification within predetermined time limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the HDCP transmitting unit uses the first computing mode to verify the receiving unit, then the time limitation for receiving the computation result can be satisfied, but the transmission distance is limited and cannot be extended
Solution Approach 1:
The verification system is divided into two segments: a first HDCP transmitting unit that communicates with a repeater device over a short distance (satisfying time limitations), and a second HDCP transmitting unit that communicates with the receiving unit over a long distance. The repeater device acts as an intermediary that bridges these two segments, allowing the overall system to achieve both short-distance fast verification and long-distance transmission capability.
Solution Approach 2:
A repeater device is introduced as an intermediary component between the transmitting unit and the receiving unit. The repeater device receives the computation result from the receiving unit and transmits it to the first HDCP transmitting unit, enabling the system to overcome the transmission distance limitation while maintaining the time limitation requirement for verification.
2Length of stationary object
If the transmission distance between the HDCP transmitting unit and the HDCP receiving unit is extended, then the range of data transmission is increased, but the time limitation for verification cannot be satisfied
Solution Approach 1:
The system segments the transmission path into a short-distance link (transmitting unit to repeater) and a long-distance link (repeater to receiving unit). The short-distance link satisfies the time limitation for verification, while the long-distance link extends the transmission range. The repeater device coordinates the timing to ensure the overall verification process meets the time requirement.
Solution Approach 2:
The repeater device performs preliminary actions by receiving and storing the computation result before it needs to be transmitted to the HDCP transmitting unit. This allows the system to prepare the verification data in advance, ensuring that when the transmitting unit requests the result, it can be provided within the required time limitation even though the physical distance is extended.
3Length of stationary object
If a repeater device is introduced to extend transmission range, then the transmission distance is increased, but the system complexity increases
Solution Approach 1:
The repeater device is designed to perform multiple functions: it acts as an HDCP receiving unit to communicate with the second transmitting unit over long distances, serves as an HDCP transmitting unit to communicate with the first transmitting unit over short distances, and provides buffering and timing coordination. This multi-functionality reduces the need for separate dedicated components for each function.
Solution Approach 2:
The repeater device autonomously manages the verification process by independently handling the reception of computation results from the receiving unit, storing them in its buffer, and transmitting them to the transmitting unit when requested. This self-service capability reduces the need for complex external control mechanisms and simplifies the overall system architecture.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
A communication verification system is provided. The communication verification system includes a local transmitting-end unit, a remote receiving-end unit, and a repeater device. The local transmitting-end unit is set to a first computing mode and outputs an initial value. The remote receiving-end unit is set to a second computing mode. The repeater device receives the initial value from the local transmitting-end unit and outputs an initial value to the remote receiving-end unit according to the second computing mode. The repeater device receives and stores a computation result from the remote receiving-end unit, and then outputs a confirmation signal to the local transmitting-end unit according to the first computing mode. The repeater device outputs the computation result to the local transmitting-end unit for verification when the repeater device receives a query signal from the local transmitting-end unit.