In CAS-notified area, the free-to-air (FTA) channels are carried over the network in analog form, while the pay channels are carried in encrypted and digitally modulated form, for which a STB is required.
Yet another decade went by and in November 2011, the ministry of information and broadcasting issued a notification, setting 31 March 2015 as the deadline for complete shift from analogue to digital addressable cable TV systems (DAS). Parliament passed The Cable Television Networks (Regulation) Amendment Act to digitize the cable television sector. Chennai, Delhi, Kolkata and Mumbai had to switch by 31 October 2012. The second phase of 38 cities, including Bengaluru, Chandigarh, Nagpur, Patna and Pune, was to switch by 31 March 2013. The remaining urban areas were to digitize by 30 November 2014 and the rest of the country by 31 March 2015. Here is an attempt to answer most questions that you would have on DAS. What is digital addressable cable TV system (DAS)? DAS is a cable TV service in which TV channels are sent through cable TV network in digital and encrypted form. Only authorized users can receive channels using a set-top box (STB) and a TV set. The authorization is given by the service provider.
This system is able to carry a large number of TV channels, radio services and other value-added
The multi-system operator (MSO) and their linked local cable operators (LCOs) are the service providers in DAS. How is DAS different from the existing cable TV system? The existing cable TV system is predominately analog in nature. In case of analog cable TV system, the TV channels are sent in analog and unencrypted form. The analog cable TV system can carry up to 80 to 100 TV channels. In this system, consumers do not have the option to choose channels/services of their choice and pay accordingly; rather, they have to pay for the entire bouquet of channels offered by the cable operator.
On the other hand, the capacity of a DAS is much higher than the existing analog cable TV system. A consumer under DAS will be able to choose channels/ services of their choice and pay accordingly. A set-top box is required along with the TV set for receiving the channels in DAS. What are the advantages of DAS for consumers? Consumer will get better-quality signal for all the channels. Consumer will get more choice of channels. DAS supports HD and 3D channels. Consumer can choose the channels on à-la-carte (individual) basis and pay only for the channels chosen. DAS offers value-added services – triple play with broadband, movie on demand, etc. Electronic programme guide (EPG) can be provided in DAS, which makes it possible for the consumer to select a particular channel or service in a simple user-friendly manner. These features provide a much improved viewing experience to the consumer. What is the monthly charge that a consumer has to pay for availing services in DAS? The monthly charge depends upon the package/ bouquet/channels/services chosen by the consumer. The consumers of DAS can choose a package of one or more pay channel, only FTA channels, only pay