Patent ID: 7546173
Filing Date: 2009-06-09
Classification: H04H,H04S

Abstract:
1. An apparatus for the analysis, marking and summing of at least two separate time-synchronized audio channels delivering at least two separate signals carrying encoded audio content and control data, the apparatus comprising: an at least one audio channel marking component to extract from at least one of the at least two separate time-synchronized audio channels, signal-specific characteristics and channel-specific control information, and to generate from the extracted control information and signal characteristics channel-specific marking data; an at least one audio summing component to sum the at least two separate signals into a summed signal, and to generate signal summing control information; and an at least one marking and summing embedding component to insert the generated marking data and summing control information into the summed signal, wherein said marking and summing embedding component embeds said control information by data hiding, thereby generating a summed signal carrying combined audio content, marking data and summing control information into the summed signal.