Tabla de Contenidos: “…9.1 Main proprietary middlewares used in Europe9.2 The open European 'middlewares'; 10 Evolution: state of the art and perspectives; 10.1 Digital terrestrial television; 10.2 Evolution of the set-top box; 10.3 New architectures; Appendix A: error detection and correction in digital transmissions; A1.1 An error detecting code: the parity bit; A1.2 Block error correction codes; A1.3 Convolutional coding; Appendix B: spectral efficiency of cable and satellite transmissions with DVB parameters; Appendix C: reception of the digital TV channels of ASTRA and EUTELSAT…”