LDM Decoding Circuit With Noise-Based Enhanced Layer Selection

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Solution Overview

Problem

In the LDM system, successful decoding of the enhanced layer signal relies on the successful decoding of the core layer signal, but if core layer decoding fails, resources are wasted attempting to decode the enhanced layer signal, leading to inefficiency, especially under conditions like burst noise.

Innovation Solution

A decoding circuit with a first decoding unit for the core layer signal and a second decoding unit for the enhanced layer signal, where the enhanced layer signal is selectively decoded based on noise information related to the reception state of the multiplexed signal, allowing for efficient decoding by determining whether to proceed with enhanced layer decoding based on noise conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the enhanced layer signal is always decoded regardless of core layer decoding success, then the enhanced layer signal may be successfully decoded even when core layer decoding fails, but processing resources are wasted and power consumption increases

Engineering Contradiction:

Improveenhanced layer signal decoding success rateVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The decoding system dynamically adjusts its operation mode based on the reception state. When the core layer signal is successfully decoded, the system proceeds to decode the enhanced layer signal. When core layer decoding fails, the system adaptively decides whether to attempt enhanced layer decoding based on noise information, thereby optimizing power consumption while maintaining decoding success rate.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the decoding parameter (whether to decode enhanced layer) based on the noise information and core layer decoding result. This parameter change allows the system to avoid unnecessary enhanced layer decoding when core layer decoding fails, reducing power consumption while maintaining high enhanced layer decoding success rate when conditions are favorable.

Inventive Principle:

Principle #35Parameter changes

2Loss of energy

If the enhanced layer signal is decoded only when core layer decoding succeeds, then power consumption is reduced, but enhanced layer signal decoding opportunities are lost when core layer decoding fails

Engineering Contradiction:

Improvepower consumptionVSAvoidenhanced layer signal decoding success rate

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The system dynamically changes the decoding strategy parameter based on noise information. When noise level is low and core layer decoding fails, the system may still attempt enhanced layer decoding, thereby maintaining high decoding success rate while avoiding unnecessary processing when noise is high, thus optimizing power consumption.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The decoding system transitions from a static decision rule (always decode or never decode enhanced layer) to a dynamic decision-making process that considers both core layer decoding result and noise information, enabling flexible adaptation to different reception conditions.

Inventive Principle:

Principle #15Dynamics

3Loss of information

If both core layer and enhanced layer signals are always decoded, then complete signal recovery is achieved, but processing time and computational resources are wasted

Engineering Contradiction:

Improvesignal recovery completenessVSAvoiddecoding processing time

Core Design Contradiction:

Loss of informationVSLoss of time

Solution Approach 1:

The system performs partial decoding action - only decoding the enhanced layer signal when necessary (when core layer decoding fails but noise information suggests successful enhanced layer decoding is possible). This avoids excessive full decoding while ensuring complete signal recovery when needed.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The decoding parameter (whether to proceed with enhanced layer decoding) is changed based on the combination of core layer decoding result and noise information, allowing the system to optimize processing time while maintaining signal recovery completeness.

Inventive Principle:

Principle #35Parameter changes

4Loss of energy

If selective decoding based on noise information is implemented, then power consumption is optimized, but system complexity increases

Engineering Contradiction:

Improvepower consumptionVSAvoiddecoding system complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The system introduces noise information as an intermediary parameter to mediate the decision between decoding and not decoding the enhanced layer signal. This intermediary enables intelligent power optimization without requiring complex control logic, as the noise information naturally indicates the feasibility of successful decoding.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11637567B2Decoding circuit

Publication Date: 2023.04.25 SONY SEMICON SOLUTIONS CORP

AI summary

There is provided a decoding circuit including; a first decoding unit that decodes a first signal from a multiplexed signal in which the first signal and a second signal are multiplexed in an LDM (Layered Division Multiplexing) system; and a second decoding unit that decodes the second signal from the multiplexed signal using the decoding result of the decoded first signal, wherein the second signal is selectively decoded based on noise information related to a reception state of the multiplexed signal.