Digital recording of time compounded video signal - uses parallel-serial digital signal train fed into memory for two speed sampling

Abstract

Abstract The process uses a video recorder, in which the analogue signal is digitally encoded, time compressed and multiplexed with the sync. pulses of the video signal. The reverse operation is also included so that the analogue signal can be retrieved. The digital signal is written into stores at one sampling frequency and read-out at a higher sampling frequency to achieve the time compression. The incoming analogue signal is amplified, fed through a low pass filter and sampled. Next it is digitally encoded, and its output has a parallel form. The output is fed into parallel/serial converter shift registers. The serial form data has synchronisation pulse bits added and is fed into the two sampling frequency memory system for time compression. The output of the memory is multiplexed and mixed for recording.

Inventors

• 👤 Michael Obremski
• 👤 Manfred Richter

Bibliographic Details