Flexible Power Management for Digital Broadcasting Receivers

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Solution Overview

Problem

Digital broadcasting to handheld devices faces inefficiencies in power management due to the lack of flexibility in existing systems, which results in excessive power consumption even when processing a single service, as they are designed to handle all services uniformly, leading to unnecessary processing and power waste.

Innovation Solution

Implementing a scalable multimedia coding scheme over a service-based time-slicing mechanism that allows receivers to autonomously manage power consumption by varying the amount of data processed based on operational modes, utilizing significance-based data partitioning and reordering of OFDM symbols to reduce processing during less significant intervals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If uniform multiplexing of all services is used in DVB-T system, then all services can be transmitted, but power consumption increases due to unnecessary processing of non-selected services

Engineering Contradiction:

Improveservice transmission capabilityVSAvoidreceiver power consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The transport stream is segmented into multiple elementary streams, each corresponding to a specific service. Each elementary stream is independently multiplexed and can be selectively processed by the receiver based on service selection, allowing the receiver to deactivate processing for non-selected services and reduce power consumption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically adjusts receiver processing based on service selection. The receiver can activate or deactivate processing functions for different elementary streams depending on which service the viewer has selected, transforming the static uniform processing approach into a dynamic selective processing approach that adapts to user needs.

Inventive Principle:

Principle #15Dynamics

2Use of energy by moving object

If time-slicing mechanism is used in DVB-H system, then average power consumption is reduced, but flexibility in power management is limited

Engineering Contradiction:

Improveaverage power consumptionVSAvoidpower management flexibility

Core Design Contradiction:

Use of energy by moving objectVSAdaptability or versatility

Solution Approach 1:

The patent applies different processing qualities to different parts of the data stream. By identifying and prioritizing significant portions of data (such as video and audio elementary streams) versus less significant data, the system can apply selective processing intensity - full processing for significant data and reduced or skipped processing for less significant data, providing local quality variation in power management.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system provides dynamic power management by allowing the receiver to adjust processing levels based on service selection and data significance. Unlike the fixed time-slicing approach, this system can dynamically adapt processing behavior to user-selected services and the relative importance of different data portions, offering flexible power management modes.

Inventive Principle:

Principle #15Dynamics

3Reliability

If all data is processed to maintain quality, then video or audio quality is preserved, but power consumption increases

Engineering Contradiction:

Improvevideo or audio qualityVSAvoidprocessing power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system changes the processing parameters based on data significance. For significant portions of data (such as elementary streams containing video or audio), full processing is applied to maintain quality. For less significant portions, processing parameters are adjusted or processing is skipped entirely, allowing quality preservation for critical data while reducing power consumption for non-critical data.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS7809064B2Systems and methods of flexible power management applicable to digital broadcasting

Publication Date: 2010.10.05 IND TECH RES INST

AI summary

A system for receiving a digital broadcast includes an input terminal that receives the digital broadcast containing scalable data, and a controller for controlling an operation mode of the system. In addition, the system may also include a processor that decodes the data, and a power management device that varies the amount of data to be decoded according to the operation mode.