Data hiding via phase manipulation of audio signals

Details Data hiding via phase manipulation of audio signals Data hiding via phase manipulation of audio signals

2007-10-30

2007-10-30

Dorvil, Richemond (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

Application

C704S270000, C704S253000

Reexamination Certificate

active

10870685

ABSTRACT:
Data are embedded in an audio signal for watermarking, steganography, or other purposes. The audio signal is divided into time frames. In each time frame, the relative phases of one or more frequency bands are shifted to represent the data to be embedded. In one embodiment, two frequency bands are selected according to a pseudo-random sequence, and their relative phase is shifted. In another embodiment, the phases of one or more overtones relative to the fundamental tone are quantized.

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