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WHAT IS THE DIFFERENCE BETWEEN ANALOGUE AND DIGITAL TECHNOLOGY?
 


As a technology, analogue modulation is the process of taking an audio or video signal and translating it into electronic pulses. Digital sampling on the other hand converts the audio and video signal into a binary format, where they are represented by a series of 1s and 0s.  

Analogue signals are continuous where digital signals are discreet. As an analogy, consider a light switch that is either on or off (digital) and a dimmer switch (analogue) that allows you to vary the light in different degrees of brightness.

WHAT IS THE DIFFERENCE BETWEEN ANALOGUE AND DIGITAL TRANSMISSION?


Analogue broadcasting has been around for over 70 years. While the technology is fairly inexpensive, analogue signals have bandwidth (the amount of space available for the signals) limitations.

The newer of the two, digital technology, breaks your television signal into binary code then transfers it to a set top box that takes all the numbers and re-assembles them into the original signal. With digital technology, any errors that may have occurred in the data transfer and can be corrected, giving the viewer a distortion free, clearer TV picture.

WHY IS IT NECESSARY TO MIGRATE?


South Africa is part of the global community in terms of trade and commerce, technology and standards, among others. It is also an affiliate to international bodies like International Telecommunications Union (ITU).

The ITU set a deadline of June 2015 for Africa and Europe Region to migrate to digital broadcasting. This international digital migration deadline means that all broadcasters who are still transmitting their broadcasting signal on the analogue (old) technology will no longer be protected from harmful interference of their broadcasting services.

WHEN IS THE SWITCH FROM ANALOGUE TO DIGITAL IN SA?


There are two key dates. In November 2008, a dual broadcasting period will begin. This will expose the change over to consumers, in preparation for November 2011, where the analogue signal will be switched off. The use of digital transmission will also impact on South Africa's ability to host a successful 2010 FIFA World Cup tournament in terms of international broadcasting quality.

WHAT MUST THE CONSUMER DO?


To watch digitally transmitted TV, the process is very simple. Firstly, decide when you want to convert – the start date is November 2008 and the deadline is November 2011.  Should you not have DSTV, a Terrestrial Set Top Box (STB) will be required to migrate to digital. The TV sets in SA will not be able to receive the signal even if they have digital tuners due to Conditional Access requirements and an Electronic Program Guide (EPG) that is not, as yet, defined.

The STB is connected to the television set via RCA or RF connectors like a VCR or DVD.

The estimated purchase price of a STB will be around R700-00, depending on the amount of the subsidy from the Government.

The Department of Trade and Industry has been interacting with manufacturers and creating awareness about the change, but with the application of the STB, consumers can rest assured that their televisions will be compatible in the digital age.

 
Set Top Box
Set Top Box Back
Set Top Box Standing

WHAT ARE THE BENEFITS OF DIGITAL TELEVISION?


There are many benefits to be enjoyed by digitally transmitted television. A number of new channels will be added, transmitted and received (multi-channel terrestrial broadcasting).

Digital broadcasting creates improvements in video and sound quality that will allow for a High Definition TV environment.

Also, the transmission and receiving of broadcasting data and signal expands to incorporate different platforms including Mobile Phone TV, Internet Broadcasting IPTV, DVB-h (Digital Video Broadcasting – camcorder).

Different types of data can be simultaneously carried – video, sound, data, audio and voice and the consistency of the data improves over greater distances.

 

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