Massachusetts Institute of Technology

Meta Platforms Technologies, LLC

Ishwarya Ananthabhotla

Nava K Balsam

Antje Ihlefeld

Haniyeh Salehi

Khia Johnson

A method for hiding data within cover audio uses a set of sample codebook waveforms that are each assigned a unique representative digit value. A hidden data sequence representing the data is formed from the waveforms by concatenation of the waveforms assigned to the digit values of the data. The sequence is superimposed upon segments of the cover audio at a fractional amplitude. After transmission, the received signal is decompressed if necessary, the hidden data sequence is recovered from the cover audio, and the data is recovered from the hidden data sequence. This may be done by recovering the locations of the codebook waveforms and interpolating the time markers of the locations. The recovered data may be cleaned up by using estimated distances between successive cross-correlations to discard extraneous correlation peaks and sequence recurrence to probabilistically delete overlapping correlation peaks.

Method and system for data-hiding within audio transmissions

An eye tracking system tracks a position and an orientation of one or more eyes of a user of the eye tracking system and determines a gaze point of the user based on the position and the orientation of the user's eye(s). An audio system coupled to the eye tracking system then detects a sound in an environment of the user. A change in the gaze point of the user is detected at the eye tracking system. Based on the change in the gaze point, a determination is made as to whether the user's attention has shifted. Responsive to determining the user's attention has shifted, the sound is modified at the audio system and the modified sound is then communicated to the user.

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Cambridge, MA, United States of America

Ishwarya Ananthabhotla