Methods to embed a host signal with auxiliary information and decoding auxiliary information from a host signal embedded encrypted signal.The storage medium, and systems of encoding, decoding, transmission and receiver.

摘要

Methods of embedding a signal host with auxiliary information and decoding auxiliary information from a host signal embedded encrypted signal.The storage medium, and systems of encoding, decoding, transmission and receiver.The invention relates to methods and corresponding systems to embed a host signal (1) with auxiliary information (6) comprising the steps of filtering the signal host using filtersAppropriate (2; 10) to produce a modified signal and encoding auxiliary information in the signal modified in an encoder (5) using a technique of cross correlation.In order to improve the performance of the coding method with respect to the delay correlation.The present invention uses the appropriate filters to remove the dominant tonal components using the power spectrum of a signal the host and / or remove components with low frequ00b3u00eancD.The removal of dominant tonal components and / or components of low frequ00b3u00eancia prior to encoding or decoding method improves the performance of the method of encoding / decoding.The removed components are subsequ00b3entemente re introduced by filtration (21) and / or addition (8) to ensure that the coded signal (9) is not significantly different from the signal uncoded(1).