System and apparatus for recording and reproducing and extended definition video signal in/from a track on a magnetic carrier

System for recording and reproducing an extended definition (ED) video signal in/from a track on a magnetic record carrier, said ED video signal being in the form of pictures, each picture comprising first lines having a chrominance signal and a first luminance signal, and second lines comprising a second luminance signal modulated with a suppressed carrier, said system comprising a recording device which includes:

• an input terminal for receiving the ED video signal;
• a separation unit having an input coupled to the input terminal, and first and second outputs, said separation unit being arranged for deriving the first luminance signal from the ED video signal and presenting this first luminance signal at the first output, and for deriving the chrominance signal and presenting the chrominance signal at the second output;
• a first signal path comprising an FM modulator having an input coupled to said first output of said separation unit, said FM modulator shifting a frequency range of the first luminance signal to a predetermined frequency range;
• a second signal path comprising a mixer stage having an input coupled to the other one of said first and second outputs of said separation unit, said mixer stage mixing the chrominance signal with a predetermined frequency signal;
• a signal combining unit having first and second inputs coupled to an output of the respective first and second signal paths, and an output for combining the frequency-shifted first luminance signal and the mixed chrominance signal;
• and
• writing means having an input coupled to the output of the signal combining unit for writing the output of the signal combining unit into tracks on the magnetic record carrier;
• the system further comprising a reproducing device which includes:
• reading means for reading the video signal written by said writing means from the tracks on the magnetic record carrier, said reading means having an output;
• a separation unit having an input coupled to the output of the reading means, first and second outputs, said separation unit being arranged for deriving the frequency-shifted first luminance signal from the video signal read from the track by the reading means and presenting this frequency-shifted first luminance signal at the first output, and for deriving the mixed chrominance signal and presenting the mixed chrominance signal at the second output;
• a first signal path, including an AM demodulator, having an input coupled to the first output of said separation unit, said AM demodulator reversing the effect of the FM modulator on the first luminance signal in the first signal path in the recording device;
• a second signal path, including a mixer stage, having an input coupled to the second output of said separation unit, said mixer stage restoring the mixed chrominance signal to that before being applied to the mixer stage in the second signal path in the recording device;
• a first output terminal coupled to an output of the first signal path, for presenting the first luminance signal;
• and
• a second output terminal coupled to an output of the second signal path, for applying the restored chrominance signal;
• characterized in that the recording device therein further comprises a third signal path having an output coupled to a third input of the signal combining unit, and comprises supply means having an input coupled to the input terminal and an output coupled to an input of the third signal path, said supply means being arranged for supplying the second luminance signal in the second lines to the input of the third signal path, in that the reproducing device therein comprises a third signal path having an input also coupled to one of the first and second outputs of the separation unit, and an output coupled to a third output terminal for supplying the second luminance signal, in that a system signal path leading from the input terminal of the recording device to the third output terminal of the reproducing device via the third signal paths in the recording and reproducing devices comprises at least a first mixer stage, and in that this first mixer stage is arranged for shifting the frequency spectrum of the second luminance signal.