All Canal+ channels were also present in Spain as satellite TV, but the main channel was available for all via terrestrial broadcasting.
From the mid 90s to the mid 2000s, that main channel were open and free in some time ranges, but outside those ranges, there was some kind of encryption based on band transposing both the audio and the video channels. That easy method made some clever people people used TV capture cards inn PCs to pick that channel and do the required process to being able to watch footballs (and other sports), really recent movies, and porn.
I don't know if somebody used a DSP to do the same but one the TV, but AFAIK DSPs at that time were pretty expensive. On the other hand, I know people who used some modified satellite receivers with special menus to enter the Nagravision codes obtained from the internet in that era.
From the mid 90s to the mid 2000s, that main channel were open and free in some time ranges, but outside those ranges, there was some kind of encryption based on band transposing both the audio and the video channels. That easy method made some clever people people used TV capture cards inn PCs to pick that channel and do the required process to being able to watch footballs (and other sports), really recent movies, and porn.
I don't know if somebody used a DSP to do the same but one the TV, but AFAIK DSPs at that time were pretty expensive. On the other hand, I know people who used some modified satellite receivers with special menus to enter the Nagravision codes obtained from the internet in that era.