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The International Sound Programme Centre (ISPC) was in the north-west corner of the upper-ground floor. |
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Mondial ISPC |
Mondial ISPC was the International Sound Programme Centre. |
The ISPC functioned as a terminal for the connection of radio and television sound programmes which had previously been booked by contracted broadcasting authorities, handling 3500 programmes per month.
The 160 international circuits which were available, via cables and satellites, had bandwidths ranging from 4 to 15 kHz. The wideband circuits used FDM (Frequency Division Multiplexing) equipment supplied by GEC and Siemens Halske. Digital circuits (circa 1984) used NICAM (Near Instantaneous Companded Audio Multiplex) techniques. NICAM over point-to-point circuits pre-dated its use for stereo broadcast TV.
Note: Fibre optic cables were only just beginning to be laid across the oceans at this time.
Caroone House was the PBC (Programme Booking Centre) during the working day, while the ISPC dealt outside of normal hours.
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