Sound system producing continuous audio signals - reads stored signals from memory when no sound signals are present on video recording

摘要

The sound system enters the recorded audio signals into a memory (10) and reads them out again during those moments when no audio signal has been recorded on the recording medium. The stored audio signals and the recorded audio signals are passed alternately to the system's output. Audio-signal sign changes are used to control writing-inand reading-out of the memory. At the start of writing-in, a sample occurring after a given sign change is entered into a given storage cell. Reading starts at this storage cell and ends at that cell at which a similar sign change occurred.