1. NICAM and L-SECAM modulations
Since TDF has chosen NICAM as the standard for broadcasting digital sound associated with television, a digital carrier modulated in four phase states (PSK4) must be added to the L-SECAM multiplex. This carrier is located 5.85 MHz above the picture carrier and 650 kHz below the sound carrier. The level of the unmodulated AM sound carrier is 10 or 16 dB lower than that of the image.
1.1 NICAM data multiplex
The sound-data multiplex is organized in a 728-bit frame lasting 1 ms (728 kbit/s). It is composed of :
8-bit alignment word ;
5 bits of control information ;
11 additional data bits ;
704 parity or data audio...
Exclusive to subscribers. 97% yet to be discovered!
Already subscribed? Log in!
NICAM and L-SECAM modulations
Optimizing a stereo audio service
Bibliography
In Engineering Techniques
Exclusive to subscribers. 97% yet to be discovered!
Already subscribed? Log in!
Article included in this offer
"Signal processing and its applications"
(
157 articles
)
Updated and enriched with articles validated by our scientific committees
A set of exclusive tools to complement the resources
