Overlapping Bonded Downstream Channels for UHDTV Capacity
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Solution Overview
Problem
Existing digital video transmission systems face inefficiencies due to wasted channel capacity, particularly as ultra high-definition television (UHDTV) formats become more prevalent, leading to underutilization of available bandwidth in cable television channels.
Innovation Solution
The implementation of overlapping bonded groups of downstream channels, where channels are shared to maximize statistical multiplexing gain and increase packing density, allowing for more efficient distribution of multiple UHDTV programs within the same bandwidth, while maintaining compatibility with legacy receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If one or more compressed and modulated broadcast television programs are packed into a channel using 256 QAM, then the transmission capacity is sufficient to support UHDTV programs, but there is left over channel capacity that is wasted because it is too small to accommodate another program
Solution Approach 1:
The patent combines multiple channels into a bonded group to create a larger aggregate bandwidth. This merging allows the system to utilize the previously wasted leftover capacity from individual channels by pooling resources across multiple channels, thereby improving overall channel capacity utilization and reducing wasted capacity.
Solution Approach 2:
The patent transitions from a single-channel transmission model to a multi-channel bonded group model, adding the dimension of channel aggregation. This dimensional change enables the system to accommodate additional UHDTV programs by utilizing the combined bandwidth of multiple channels rather than being constrained by individual channel limitations.
2Quantity of substance
If the number of UHDTV programs transmitted is increased to meet growing video bit requirements, then more video content can be delivered, but the bandwidth utilization becomes less efficient due to wasted capacity
Solution Approach 1:
By merging multiple channels into bonded groups, the system increases the total available bandwidth while maintaining efficient utilization. This combination allows a greater quantity of UHDTV programs to be transmitted without sacrificing bandwidth efficiency, as the aggregated bandwidth from multiple channels is fully utilized across the program set.
3Adaptability or versatility
If new receivers are designed to support increased channel capacity and bonded groups, then more UHDTV programs can be received, but the complexity and cost of new receivers increases
Solution Approach 1:
The patent segments the bonded group into multiple individual channels that are transmitted separately over the cable network. Receivers can process these channels independently using existing single-channel tuning technology, then combine the decoded streams. This segmentation allows receivers to support bonded groups without requiring complex multi-channel simultaneous processing, thereby reducing receiver complexity and cost.
Solution Approach 2:
The patent introduces an intermediary processing stage where individual channels are decoded separately and then combined to form the complete UHDTV program. This intermediary approach allows receivers to use simpler, more cost-effective components while still achieving the capability to receive and process multiple UHDTV programs through the bonded group structure.
Data Source
AI summary
The present disclosure is directed to a system and method for creating overlapping bonded groups of downstream channels that can provide increased channel capacity to improve packing densities, while at the same time limiting complexity and cost increases of new receivers and allowing the continued operation of legacy receivers.