Process for transmitting signals of vìdeo and to decode and transcode a sign of vìdeo digital arrangement to transmit, decode and transcode a sign of vìdeo, and sign of vìdeo

摘要

"The process to transmit signals of vu00ecdeo and to decode and transcode a sign of vu00ecdeo digital arrangement to transmit, decode and transcode a sign of vu00ecdeo, and sign of vu00ecdeo".This invention relates to the generation of an MPEG video stream, which contains several slightly different programs, each with approximately the same content.The MPEG stream is constructed such that a simple transcodificador can effectively select one of these programs.This is achieved by storing the differences related to the nominal program in user data fields selected.The transcodificador is little more than a bit stream of MPEG analyzer.It replaces the bits corresponding to a selected set of macroblocos by substitution data stored in the user data fields.An MPEG decoder without any knowledge of the user data fields embedded will draw from simple mode the program rating.One application of the invention relates to broadcasting of a television program with and without a logo, or a commercial with and without a public notice.Another application refers to forms of copy protection. In these schemes, the nominal program contains a note indicating that the content can be copied once.For the record, this ticket is removed and replaced by the content accommodated in the user data field.