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Terrestrial Broadcasting
Terrestrial Television, Digital and Analogue
Audio via digital audio out on freeview box
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<blockquote data-quote="PaulR" data-source="post: 147419" data-attributes="member: 176256"><p>Two different Dolby stereos here.</p><p></p><p>Dolby surround sound, as on The Simpsons and many other programs, isn't necessarily a digital sound process. The extra information is buried in the standard stereo soundtrack and can be extracted using circuitry developed by Dolby labs.</p><p></p><p>The first circuit dsigned by Dolby was Dolby 3 channel which could extract an extra rear channel. Dolby Pro-logic circuits could extract an extra 2 channels - a centre channel for speach and another for very low frequencies (the sub-woofer) In both these circuits the rear channel is the same on the right and left sides.</p><p></p><p>In Dolby digital the audio signals are encoded into a digital stream. There are 6 six separate tacks (front left, front right, centre, rear left, rear right and the subwoofer) although, because the subwoofer has a very limited requency range its known as .1 of a channel - hence Dolbt 5.1.</p><p></p><p>Dolby labs have produced many extremely clever circuits over the years such as the various methods of reducing hiss on audio cassettes and latterly some audio processing for films that can only be used in cinemas.</p><p></p><p>For more information on mono, stereo and Dolby see <a href="http://hometheater.about.com/od/beforeyoubuy/a/surroundsound.htm" target="_blank">http://hometheater.about.com/od/beforeyoubuy/a/surroundsound.htm</a> Dolby 6.1 anyone?</p></blockquote><p></p>
[QUOTE="PaulR, post: 147419, member: 176256"] Two different Dolby stereos here. Dolby surround sound, as on The Simpsons and many other programs, isn't necessarily a digital sound process. The extra information is buried in the standard stereo soundtrack and can be extracted using circuitry developed by Dolby labs. The first circuit dsigned by Dolby was Dolby 3 channel which could extract an extra rear channel. Dolby Pro-logic circuits could extract an extra 2 channels - a centre channel for speach and another for very low frequencies (the sub-woofer) In both these circuits the rear channel is the same on the right and left sides. In Dolby digital the audio signals are encoded into a digital stream. There are 6 six separate tacks (front left, front right, centre, rear left, rear right and the subwoofer) although, because the subwoofer has a very limited requency range its known as .1 of a channel - hence Dolbt 5.1. Dolby labs have produced many extremely clever circuits over the years such as the various methods of reducing hiss on audio cassettes and latterly some audio processing for films that can only be used in cinemas. For more information on mono, stereo and Dolby see [url]http://hometheater.about.com/od/beforeyoubuy/a/surroundsound.htm[/url] Dolby 6.1 anyone? [/QUOTE]
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Terrestrial Broadcasting
Terrestrial Television, Digital and Analogue
Audio via digital audio out on freeview box
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