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<blockquote data-quote="2old4this" data-source="post: 4588" data-attributes="member: 174998">(I've moved the thread here from the Sky Digital forum since the subject matter is not Sky-related)Digital trasnmission is more robust (more tolerant of transmission errors) but the problem is providers try to squeeze in too many channels into a particular digital frequency/transponder. The blocking artefacts arise even under ideal transmission/reception conditions because the amount of information transmitted exceeds the available &quot;bandwidth&quot;, so that much more compression is needed. Analogue transmissions under ideal conditions don't suffer such indignities but then you only get max 2 such channels per frequency (H &amp; V) instead of up to 20 under digital.So the artefacts are NOT due to the technology, but to the providers wishing to cram in as many channels as possible into their expensive transponder space...The dishonest aspect is that providers advertise digital TV as being both crystal-clear AND offering many more channels. In reality, there is a trade off. If you want an example of a consistently apalling digital signal watch watch BBC-Prime... 2old</blockquote>

[QUOTE="2old4this, post: 4588, member: 174998"] (I've moved the thread here from the Sky Digital forum since the subject matter is not Sky-related) Digital trasnmission is more robust (more tolerant of transmission errors) but the problem is providers try to squeeze in too many channels into a particular digital frequency/transponder. The blocking artefacts arise even under ideal transmission/reception conditions because the amount of information transmitted exceeds the available "bandwidth", so that much more compression is needed. Analogue transmissions under ideal conditions don't suffer such indignities but then you only get max 2 such channels per frequency (H & V) instead of up to 20 under digital. So the artefacts are NOT due to the technology, but to the providers wishing to cram in as many channels as possible into their expensive transponder space... The dishonest aspect is that providers advertise digital TV as being both crystal-clear AND offering many more channels. In reality, there is a trade off. If you want an example of a consistently apalling digital signal watch watch BBC-Prime... 2old [/QUOTE]

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