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EP1204277A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Subliminally embedded keys in video for synchronization

Assignee: Tektronix Inc
•
Filing: 2001-10-16
•
Granted: —
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Expires: 2021-10-16
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Abstract

Abstract A data file containing metadata and/or control data is synchronized with associated audio/video data by subliminally embedding a key in a frame of the audio/video. The key indicates the location of the data file and a time after the embedded frame in which the data file is to be activated to be in synchronism with the audio/video. The data file is accessed via an alternate channel and held in a buffer until the time indicated by the key. The metadata from the data file is played out for display in synchronism with the associated audio/video data, and instructions contained in the control data are executed in synchronism with the associated audio/video data.

Inventors

  • 👤 Ajit M. Limaye

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 11:29
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/20; H04N21/23; H04N21/238; H04N21/2389; H04N21/23892

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 88 words
A method of synchronizing a data file with associated audio/video data using subliminally embedded keys comprising the steps of: at a transmit site embedding a key subliminally in the audio/video data, the key indicating a location of the data file on a network storage medium and a latency time; at a receive site extracting the key from the audio/video data; accessing the network storage medium according to the location indicated by the key; using the data file in synchronism with the audio/video data according to the latency time.
Claim 2
Dependent Claim 44 words
The method as recited in claim 1 wherein the data file comprises metadata to be played out in synchronism with the associated audio/video data and the using step comprises the step of playing out the metadata for display in synchronism with the audio/video data.
Claim 3
Dependent Claim 47 words
The method as recited in claim 1 wherein the data file comprises control data to be activated in synchronism with the associated audio/video data and the using step comprises the step of activating instructions contained in the control data for execution in synchronism with the audio/video data.

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