Content Receiver Tuner Merging Common Control Word
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Solution Overview
Problem
Content receivers face challenges in accessing and recording multiple instances of content that are broadcast simultaneously, requiring separate tuners and sufficient resources for descrambling, demodulating, and storing each instance, which can be inefficient and resource-intensive.
Innovation Solution
A system and method that utilize multiple tuners to receive and record multiple instances of content using a common control word for encryption, allowing simultaneous recording and storage of content from multiple transponders on a single storage medium, with a processing unit controlling the communications units and a descrambler to decrypt and store the content efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple tuners are used to receive multiple instances of content simultaneously, then the ability to access and record multiple content instances is improved, but the device complexity and hardware requirements increase
Solution Approach 1:
The patent combines multiple content reception streams into a single tuner by utilizing different transponders on the same satellite frequency. Instead of requiring separate tuners for each content instance, the system merges the reception capability into one tuner that can handle multiple transponders, thereby reducing hardware complexity while maintaining the ability to access multiple content instances simultaneously
Solution Approach 2:
The single tuner is designed to perform multiple functions by receiving and processing content from multiple transponders on different frequencies. This multi-functional approach allows one tuner to replace what would traditionally require multiple dedicated tuners, reducing device complexity while preserving versatility in accessing multiple content instances
2Reliability
If separate resources are allocated for descrambling, demodulating, and storing each content instance, then content security and integrity are maintained, but resource consumption and processing overhead increase
Solution Approach 1:
The patent merges the descrambling and demodulation processes by implementing a unified approach where content from multiple transponders is processed through shared resources. The system combines decryption, demodulation, and storage operations into an integrated workflow that reduces redundant processing while maintaining content security through controlled access to the common control word
Solution Approach 2:
The system uses a single common control word that can be copied and applied to decrypt multiple content instances simultaneously. Instead of requiring separate decryption keys and processing chains for each content stream, the control word is replicated and used across multiple descrambling operations, reducing the computational overhead and resource consumption associated with content security
3Productivity
If a common control word is used to encrypt multiple content instances, then resource usage for decryption is optimized, but content security and access control may be compromised
Solution Approach 1:
The system applies local quality by using the common control word specifically for decrypting content from authorized transponders while maintaining separate security mechanisms for different content instances. The common control word is used locally and selectively for each content stream rather than as a universal key, preserving security through context-specific application while maintaining decryption efficiency
Data Source
AI summary
Content receivers may simultaneously record multiple instances of content for multiple programming channels based on content provider instructions. Systems and methods utilize the content receivers to record these multiple instances from at least a single transponder. In some instances, multiple transponders may have a common control word so that content carried on each such transponder may be simultaneously received, decoded and recorded. Further, a single demodulator may be associated with multiple tuners, so that the single demodulator processes all content received from transponders with common control words and/or other encryption mechanisms.