HDMI Transmitting Device Using Hybrid 6b/8b and 8b/10b Encoding

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Solution Overview

Problem

The existing HDMI standards have insufficient bandwidth to support high-definition 3D and high-quality 4k2k video data transmission, and they do not enable inter-room AV content sharing across rooms.

Innovation Solution

A transmitting device that encodes video data to be DC-free and capable of clock regeneration, transmitted via a pair of AC-coupled lines as differential signals, along with a receiving device to decode and receive the encoded data, increasing bandwidth and improving signal quality while reducing power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the transmit speed is doubled to increase the bandwidth twice, then the data rate increases, but the cable length is excessively shortened due to attenuation of high-frequency components

Engineering Contradiction:

Improvetransmit speedVSAvoidcable length

Core Design Contradiction:

SpeedVSLength of stationary object

Solution Approach 1:

The patent changes the encoding parameters from conventional 8b/10b encoding to a new encoding scheme that achieves higher data rates. Specifically, it uses 6b/8b encoding for video data and 8b/10b encoding for auxiliary data, creating a hybrid encoding system that optimizes the balance between data rate and signal integrity over long cables

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent segments the data transmission into different channels with different encoding schemes. Video data uses 6b/8b encoding while auxiliary data uses 8b/10b encoding, allowing each channel to be optimized for its specific requirements while maintaining overall system compatibility

Inventive Principle:

Principle #1Segmentation

2Speed

If the transmit speed is doubled to increase the bandwidth twice, then the data rate increases, but the designer burden becomes significant

Engineering Contradiction:

Improvedata rateVSAvoiddesigner burden

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The patent creates a universal encoding system that can handle both video data and auxiliary data through a unified interface. The transmitting device and receiving device both support the new encoding scheme while maintaining backward compatibility with existing HDMI standards, reducing the need for separate design paths

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If existing HDMI standards are used, then one data transmission in one direction is defined, but inter-room AV content sharing cannot be realized

Engineering Contradiction:

Improveinter-room transmission capabilityVSAvoidconnection complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent introduces dynamic bidirectional communication capabilities where data transmission direction can change during operation. The system supports switching between unidirectional and bidirectional modes, enabling flexible inter-room AV sharing while maintaining compatibility with existing unidirectional HDMI connections

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS9036090B2Transmitting device, transmitting method, and receiving device

Publication Date: 2015.05.19 SONY GROUP CORP

AI summary

A data transmitting device may include a first data transmitting unit and a second transmitting unit. The second data transmitting unit transmits to an external device video data encoded so as to be DC-free and capable of clock regeneration, via a pair of AC-coupled lines as a transmission path. Accordingly, it is possible to increase the transmission bandwidth of video data while improving signal quality and reducing power consumption. In addition, bi-directional transmission may be allowed which may enable new applications for inter-room transmission and the like.