Parallel Binary Representation for HDBaseT Modulation
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Solution Overview
Problem
The HDBaseT standard, which uses 16-level Pulse Amplitude Modulation (PAM16), faces challenges in error resistance and overhead considerations when converting to binary modulation, particularly in noisy channels, and requires innovative methods to maintain high-definition video and audio transmission over category 5 or category 6 cables.
Innovation Solution
A device and method that generate a parallel binary representation of HDBaseT physical modulation by converting HDBaseT compliant symbols into 4-bit codes, transmitting these codes in series over multiple binary channels at a higher rate, effectively doubling the symbol rate to maintain throughput and align channels using an alignment pattern, thereby supporting high-definition video and audio transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If 16-level PAM modulation is used to transmit high-definition video and audio over category 5 or 6 cables, then transmission capacity is improved, but error resistance deteriorates in noisy channels
Solution Approach 1:
The patent segments the 16-level PAM symbols into parallel binary streams. Each PAM symbol is converted into a 4-bit binary code that is transmitted separately over multiple binary channels. This segmentation allows each binary channel to operate independently with better noise immunity while collectively maintaining the high transmission capacity of the original PAM16 system.
Solution Approach 2:
The patent creates binary copies of the PAM16 data stream. Instead of directly transmitting the multi-level PAM symbols, it generates equivalent binary representations (4-bit codes) that convey the same information. These binary copies are transmitted over separate binary channels, providing redundancy and improved error resistance while preserving the original transmission capacity.
2Reliability
If error correction codes are applied to multi-level modulations over noisy channels, then error resistance is improved, but overhead increases
Solution Approach 1:
The patent avoids the overhead of error correction codes by segmenting the PAM16 stream into parallel binary channels. Each binary channel inherently provides better noise immunity, eliminating the need for additional error correction overhead that would be required for multi-level modulations in noisy environments.
3Manufacturing precision
If HDBaseT uses asymmetric method with special line coding scheme, then transfer quality for selective data types is improved, but device complexity increases
Solution Approach 1:
The patent applies a universal binary encoding scheme that can handle all data types (video, audio, Ethernet, controls) uniformly. Instead of using complex asymmetric line coding schemes tailored for specific data types, the system uses a general-purpose binary representation that works across all channels and data types, reducing device complexity while maintaining transfer quality.
4Reliability
If parallel binary transmission is used to represent HDBaseT physical modulation, then error susceptibility is reduced, but transmission rate must be doubled
Solution Approach 1:
The patent segments the single high-rate PAM16 channel into multiple parallel binary channels operating at lower individual rates. While the aggregate transmission rate matches the original PAM16 rate, each binary channel operates more reliably at its lower rate, reducing error susceptibility while maintaining overall throughput.
Data Source
AI summary
Method and devices for generating a parallel binary representation of an HDBaseT® physical modulation. The method and devices include generating series-consisting-4-binary-symbols, each represents a physical modulation of one HDBaseT compliant symbol. The series-consisting-4-binary-symbols are transmitted over eight binary channels, where each series-consisting-4-binary-symbols is transmitted serially over one of the binary channels using transmission rate that is twice the HDBaseT rate.