Receiver Capacity Signalling Metadata for Digital Broadcast
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Solution Overview
Problem
Current digital broadcast receiver systems, such as DVB-H and DVB-T2, face inefficiencies due to insufficient PSI/SI signaling, which results in sub-optimal user experience, high bandwidth requirements, and lack of consideration for receiver capabilities like memory and burst switching, leading to potential service reception failures.
Innovation Solution
The transmission of receiver-capacity-signalling data that specifies the type of time interleaver, minimum burst interval, and frequency of physical layer pipe appearances, allowing receivers to assess their capacity before attempting service discovery and decoding, ensuring they can handle the service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If PSI or SI signalling is used in wireless communication systems, then service information can be transmitted, but the repetition periods are long and bandwidth consumption is high
Solution Approach 1:
The patent extracts only the essential receiver capacity parameters (time interleaver type, minimum burst interval, physical layer pipe appearance frequency) from the complete PSI/SI signaling data, transmitting only these critical elements through L2 signaling to reduce bandwidth consumption while maintaining adequate service information transmission
Solution Approach 2:
The signaling information is segmented into two parts: essential receiver capacity parameters transmitted through L2 signaling with shorter repetition periods, and complete service information transmitted through traditional PSI/SI tables with longer repetition periods, allowing selective reception based on receiver capabilities
2Loss of information
If comprehensive PSI/SI signalling is transmitted, then complete service information is available, but receiver capacity requirements are not considered leading to service reception failures
Solution Approach 1:
The patent transmits receiver capacity parameters (time interleaver type, minimum burst interval, physical layer pipe appearance frequency) in advance through L2 signaling before the receiver attempts to receive services, enabling the receiver to pre-assess its capacity and select only those services it can successfully decode, thereby preventing service reception failures
Solution Approach 2:
The patent provides different levels of information completeness to different receivers based on their capabilities: receivers with sufficient capacity receive complete service information, while receivers with limited capacity receive only essential parameters and can selectively receive services matching their capabilities
3Adaptability or versatility
If L1 signalling size varies with number of PLPs, then signaling flexibility is improved, but L1-pre signalling cannot be decoded without preliminary information
Solution Approach 1:
The patent transmits essential receiver capacity parameters and L1-pre signalling parameters in advance through L2 signaling, enabling the receiver to configure its decoder with the necessary preliminary information before attempting to decode L1 signalling, thus resolving the circular dependency where L1-pre decoding requires information that is only available after L1 decoding
Data Source
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AI summary
Embodiments are directed to transmitting receiver-capacity-signalling data that specifies a plurality of receiver capacities to be used for receiving a service. The signalled receiver capacities may include: a type of time interleaver being used and a minimum burst interval between two consecutive bursts. The signalled receiver capacities may also specify: how often a physical layer pipe appears in frames, and/or a number of a frame in which a physical layer pipe appears for the first time during a super frame. Embodiments are directed to receiving the receiver-capacity-signalling data and if, based on the received receiver-capacity-signalling data, receiver capacity is sufficient for one or more selected services, performing service discovery and decoding the one or more services. Otherwise, decoding the one or more services may not be performed.