METHOD AND SYSTEM TO PROCESS A DIGITAL IMAGE

摘要

A method and an apparatus to process a digital image is provided. The method may comprises receiving host image data, receiving audio data and embedding the audio data within the host image data to provide an embedded image wherein the audio data if freely recoverable from the embedded image. The method may comprise processing the audio data using a Short Term Fourier Transformation (STFT) prior to embedding the audio data within the host image data. The method may reduce an amount of digital data that represents an audio signal included in the audio data prior to embedding the audio data whithin the host image. In one embodiment, the method comprises quantizing magnitude data and discarding phase data of the audio signal to provide the audio data for embedding. The method may comprises quantizing the audio data to match a shell of a D4 Lattice.