Time-Shifted Broadcast Ad Filtering via Real-Time Clock Headers
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Solution Overview
Problem
The conventional advertising model in broadcast television has broken down due to time-shifting, allowing viewers to fast-forward through advertisements and resulting in unsuitable ads being shown at inappropriate times, damaging the commercial viability of 'free to air' television and viewer experience.
Innovation Solution
A system that supplies digital video/audio programs with periodic breaks for advertisements, each with a header containing time-of-day restrictions, and a real-time clock signal to ensure ads are displayed according to local regulations during time-shifted viewing, using a Personal Video Recorder (PVR) with data storage and real-time clock synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If programmes are recorded and viewed at a different time of day (time-shifted viewing), then viewers can watch programmes at their convenience, but unsuitable advertisements may be shown at inappropriate times (e.g., children seeing adult-oriented ads)
Solution Approach 1:
The system performs preliminary actions by embedding time-of-day validity information in advertisement headers during the recording process. When a programme is recorded, the PVR stores not only the video content but also metadata about each advertisement including its permitted viewing times. During playback, the system proactively checks the current time against these pre-stored validity parameters and automatically excludes advertisements that are not valid for the current time of day, preventing inappropriate ad exposure before it can occur.
Solution Approach 2:
The system implements feedback by continuously monitoring the real-time clock signal during time-shifted playback and comparing it against the time validity criteria stored in advertisement headers. This closed-loop feedback mechanism dynamically determines which advertisements should be displayed at any given moment during playback, automatically adjusting the advertisement stream to match current time conditions and ensuring appropriate content is shown regardless of when the programme is viewed.
2Stability of the object's composition
If all original advertisements are shown in time-shifted programmes, then the complete programme content is preserved, but advertisers cannot charge for time-shifted viewing and commercial viability is damaged
Solution Approach 1:
The system applies dynamics by transforming the static advertisement stream into a dynamic, time-adaptive sequence. Instead of playing back advertisements in their original fixed sequence regardless of playback time, the system dynamically reconfigures which advertisements are shown based on the current time of day. The PVR reads the time validity information from advertisement headers and actively selects and plays only those advertisements whose time windows include the current playback time, creating a flexible, time-responsive advertisement stream that maintains programme integrity while enabling commercial viability.
Solution Approach 2:
The system changes parameters by modifying the temporal validity parameter of each advertisement based on real-time clock information. Each advertisement header contains time-of-day validity parameters that are evaluated during playback. The system dynamically adjusts which advertisements are displayed by comparing the current time against these parameters, effectively filtering the advertisement stream to show only those ads whose time parameters match the current playback context, thus preserving programme integrity while enabling appropriate ad delivery.
3Adaptability or versatility
If parental controls are used to block unsuitable content, then sexual or violent programmes can be controlled, but there are no controls to remove unsuitable advertisements from time-shifted programmes
Solution Approach 1:
The system implements self-service by embedding time-of-day validity information directly within each advertisement header during the recording process. The PVR automatically reads and processes this validity information without requiring external parental control intervention. During playback, the system autonomously compares the current time against the stored validity parameters and automatically excludes inappropriate advertisements, making the ad filtering function self-regulating based on time parameters rather than requiring complex parental control settings or manual intervention.
Data Source
AI summary
In a system for time-shifted viewing of television broadcasts, advertisements 41, 43 are provided with headers 50, 52 containing times of day at which that advert may be viewed or not viewed. A Personal Video Recorder (PVR) 60 stores adverts in an advertisement database 70, stores broadcast program segments in a program database 80, and broadcast rules in a rules database 90. For viewing of the program when time-shifted, the PVR checks the time of day, checks the headers of the adverts, and shows only adverts which are permissibly viewed at that time of day.