Predictive Tuning for Digital TV Channel Switching Latency

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Solution Overview

Problem

Digital television transmission introduces noticeable time delays when switching between channels, which detract from the user experience by not allowing instantaneous channel changes like analog systems, and existing solutions such as dual tuners are impractical or ineffective in eliminating these delays.

Innovation Solution

A method and apparatus that use two or more tuners to predict the next channel selection based on historical models and user behavior, allowing an alternate content stream to be processed and presented when the predicted channel matches the user's selection, thereby reducing or eliminating channel switching latency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If digital signal processing is used to receive and process digital television signals, then signal quality and channel density are improved, but channel switching delay increases

Engineering Contradiction:

Improvesignal qualityVSAvoidchannel switching delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system performs preliminary action by predicting the next channel a user will select and pre-processing that channel's signal in advance. When a channel change is requested, if it matches the predicted channel, the pre-processed signal is immediately available, eliminating the processing delay. This resolves the contradiction by preparing the signal beforehand while maintaining digital processing quality.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts its processing behavior based on prediction confidence and user viewing patterns. It uses historical data and real-time behavior to adaptively determine which channels to pre-process and how aggressively to manage buffer resources, optimizing the balance between signal quality and switching speed.

Inventive Principle:

Principle #15Dynamics

2Loss of time

If multiple tuners are used to simultaneously receive and process all available channels, then channel switching delay is eliminated, but device complexity and cost increase

Engineering Contradiction:

Improvechannel switching delayVSAvoidnumber of tuners

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

Instead of using multiple tuners for all channels (excessive action), the system uses a single tuner with intelligent prediction to pre-process only the likely next channel (partial action). This selective approach achieves fast channel switching without the complexity and cost of multiple tuners, resolving the contradiction between switching speed and device complexity.

Inventive Principle:

Principle #16Partial or excessive action

3Quantity of substance

If digital transmission techniques are used, then channel density and signal quality are improved, but perceivable time delay is introduced

Engineering Contradiction:

Improvechannel densityVSAvoidperceivable time delay

Core Design Contradiction:

Quantity of substanceVSLoss of time

Solution Approach 1:

The system applies preliminary action by pre-receiving and pre-processing digital signals for predicted next channels before they are actually requested. This allows the system to maintain high channel density through digital transmission while eliminating perceivable delay by having the signal ready in advance.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS8245251B2Method and apparatus for predictive tuning in digital content receivers

Publication Date: 2012.08.14 ARRIS ENTERPRISES LLC

AI summary

Primary presentation stream is received and presented to user. Alternate presentation stream received according to channel prediction stands ready for presentation if user selects channel processed as alternate stream. Prediction is made according to pre-indication of channel selection or time-selected usage history.