Title :
High-quality frame-synchronization and encryption for satellite video signal transmission
Author :
Kubota, Shuji ; Morikura, Masahiro ; Kato, Shuzo ; Hayashi, Kunihiro
Author_Institution :
NTT Radio Commun. Syst. Lab., Tokyo, Japan
Abstract :
A high-quality frame-synchronizer for video signal switching, freezing, and encryption is proposed. In order to realize the high-quality frame-synchronizer, a novel high-speed and high-definition 11-b A/D (analog-to-digital) converter which achieves a quite high S/N (signal-to-noise) ratio performance of 63 dB (weighted) has been developed. The developed frame-synchronizer provides synchronized video signal switching by field freezing and an encryption/decryption capability by line scrambling over digital frame memories for high-security video signal transmission. Moreover, it adjusts the delay difference of the digitally processed video signal and audio signals
Keywords :
analogue-digital conversion; audio signals; cryptography; direct broadcasting by satellite; synchronisation; television broadcasting; video signals; visual communication; 63 dB; ADC; DBS; SNR; audio signals; delay adjustment; encryption/decryption; field freezing; frame-synchronizer; satellite video signal transmission; video signal switching; Communication switching; Cryptography; Delay; Frequency modulation; Frequency synchronization; Matrix converters; Satellite broadcasting; Signal processing; Switching converters; Transmission line matrix methods;
Conference_Titel :
Communications, 1990. ICC '90, Including Supercomm Technical Sessions. SUPERCOMM/ICC '90. Conference Record., IEEE International Conference on
Conference_Location :
Atlanta, GA
DOI :
10.1109/ICC.1990.117236
