In the analog radio and television system, an analog signal is received by the antenna and is then displayed by means of a television set or video recorder provided with an adapted tuner.Ĭurrently available television sets and video recorders are not compatible with the new digital terrestrial standard. More particularly, the invention relates to a digital to analog converter for television signals in digital format, in order to be able to use with digital television signals the analog television sets and video recorders currently in use.Īs it is known, digital terrestrial television is about to replace analog television, which up to now has been used worldwide. The present invention relates to a digital to analog converter particularly for television signals and the like. A receiver (10, 11) for the digital to analog conversion of a television signal, characterized in that it comprises tuning means (2) adapted to receive in input a digital signal (6) decoding/demodulation means (3) adapted to convert said digital signal into an analog video and audio signal modulation means (4) adapted to remodulate said video and audio signal in the analog television standard and mixing means (5), which are adapted to receive in input the signal in output from said modulation means (4) and to mix it with an input signal which arrives from mixing means (5) of a receiver (11) arranged upstream.
The converter according to one or more of the preceding claims, characterized in that said mixing means (5) are adapted to suppress the channel on which said mixing means (5) modulate.Ĩ. The converter according to one or more of the preceding claims, characterized in that the analog radiofrequency signal (15) in output from said mixing means is conveyed, at the last receiver (11) of the receivers connected in a cascade configuration, over a common coaxial aerial cable.ħ. The converter according to one or more of the preceding claims, characterized in that said plurality of receivers (10, 11) are connected in a cascade configuration, said digital signal (6) being input to the tuning means (2) of each one of said receivers (10, 11).Ħ. The converter according to one or more of the preceding claims, characterized in that said mixing means (5) of a main receiver (10) among said receivers receive in input said digital signal in addition to the signal in output from said modulation means (4).ĥ. The converter according to claim 1, characterized in that said decoding/demodulation means (3) of each receiver (10, 11) are connected to each other by means of a bus (16).Ĥ. The converter according to claim 1, characterized in that each one of said receivers (10, 11) comprises power supply means (12) adapted to be supplied with mains power.ģ. A digital to analog converter (1), particularly for radio and television signals, characterized in that it comprises a plurality of receivers (10, 11), each receiver comprising tuning means (2) adapted to receive a digital television signal (6), decoding/demodulation means (3) adapted to convert said digital television signal into a video and audio signal, modulation means (4) adapted to remodulate said video and audio signal in the analog television standard, mixing means (5) adapted to mix the already-modulated signal that arrives from an upstream receiver with the modulated signal that arrives from the modulation means (4), and adapted to emit in output an analog radiofrequency signal (15), each receiver being adapted to receive a configurable digital channel.Ģ.