Receiver for a still picture broadcasting signal

A receiver for a still picture broadcasting signal for receiving a composite signal including video signals, multivalue pulse series which are pulse code modulated by audio signals, and combined synchronizing signal groups including first synchronizing signals each formed of binary pulse series of a specified code figure synchronized with said multivalue pulse series of the audio signals and second synchronizing signals each formed of binary coded pulse series required for the reproduction of said video and audio signals, and blanking periods and inserted in predetermined positions in said video signals and the multivalue pulse series, and for reproducing said video and audio signals, the receiver comprising:

• means for regenerating clock pulse series synchronized with said multivalue pulse series including means for detecting the timing of said first synchronizing signals from said composite signal;
• first identification means for identifying said composite signal as binary pulse signals including means for using a preselected threshold level under synchronized conditions with said regenerated clock pulse series;
• means for detecting and regenerating at least a part of said second synchronizing signals from the composite signal identified as the binary pulse signals by said first identification means;
• means for producing pulse signals synchronized with said blanking periods including means for using the part of said second synchronizing signals regenerated;
• pulse clamp means for pulse clamping the composite signal including means for using said pulse signals synchronized with said blanking periods;
• and
• second identification means for identifying the audio signals as multivalue pulse series from the composite signal, which is pulse clamped by said pulse clamp means, under synchronization conditions with the regenerated clock pulse series.