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DVB cable (CATV) (DVB-C)

DVB Cable (DVB-C) is the variant of DigitalVideoBroadcasting (DVB) for the transmission of digital TV via broadband cable networks(BK). The specifications of DVB-C are based on those of DVB-S. For video compression, DVB-C uses MPEG-2 or MPEG-4.

As a modulation technique, DVG-C uses quadrature amplitude modulation (64QAM); although higher modulation schemes are also supported. The frame length in the transport stream is 204 bytes, of which 16 bytes are used for error correction, which follows the Reed-Solomon code of 204/188 bytes.

Bandwidths and data rates of DVB-C according to ETS 300 429

Bandwidths and data rates of DVB-C according to ETS 300 429

The hyperband between 300 MHz and 450 MHz with channels S21 to S41 is available for DVB-C transmission. The bandwidths are 7 MHz and 8 MHz, the data rate is 38.5 Mbit/s with a bandwidth of 8 MHz and 64QAM, and increases to 51.3 Mbit/s with 256QAM. The DVB-C specifications provide for a return channel that must be implemented in the cable distribution networks. As with the other DVB processes, there is an improved cable variant with DVB-C2.

Informations:
Englisch: DVB cable (CATV) - DVB-C
Updated at: 15.11.2008
#Words: 157
Links: digital video broadcasting (DTV) (DVB), transmission, digital, television (TV), vertical interconnect access (PCB) (via)
Translations: DE
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