During recording, a multilingual indication is generated when at least two of the audio channels of a digital audio signal are associated with a common program, and the multilingual indication is combined with the digital audio signal. During reproduction, a display is activated when a multilingual indication...http://www.google.es/patents/US6344939?utm_source=gb-gplus-sharePatente US6344939 - Digital audio channels with multilingual indication
Digital audio channels with multilingual indication
