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Audio / video dropout on terrestrial TV

  • 13-07-2007 3:23pm
    #1
    haz
    Closed Accounts Posts: 313 ✭✭


    Has anyone noticed decreasing quality of the terrestrial TV broadcasts (i.e. of the analogue signal received via a roof aerial)?

    I see blocks of pixelated colour like an MPEG artefact (except this is on analogue TV) in stripes usually towards the lower-right of the image and the occasional MPEG-style blocking around rapid motion. These must be generated by digital storage and processing before transmission, perhaps from a highly fragmented storage or poor network bandwidth. The worst is the audio dropout, which consists of short silences and the occasional one-semitone drop in pitch followed by a crackle. RTE2 and TV3 are the worst affected. RTE1 seems unaffected and it is rare on TG4.

    I once phoned RTE Networks when the sound disappeared entirely and a most helpful individual "reset the link to the Cork repeater" with an immediate restoration of quality - but this is now everyday and makes some programmes unwatcheable.


Comments

  • #2
    _blank_
    Closed Accounts Posts: 41,926 ✭✭✭✭_blank_


    Moved to Terrestrial TV


  • #3
    watty
    Registered Users, Registered Users 2 Posts: 32,417 ✭✭✭✭watty


    Do you watch via Spur Hill?


  • #4
    Antenna
    Registered Users, Registered Users 2 Posts: 2,360 ✭✭✭Antenna


    watty wrote:
    Do you watch via Spur Hill?

    He may also be watching via Collins Barracks which is a relay of Spur Hill.

    Spur Hill seems to be very badly affected by audio dropouts, I have experienced it myself in recent days. Also the Audio level on TV3 is also noticeably lower than the other 3 (at least on non-NICAM TVs).

    It was all more reliable back in the days when the transmitters were linked by analogue microwave links!!


  • #5
    haz
    Closed Accounts Posts: 313 ✭✭haz


    watty wrote:
    Do you watch via Spur Hill?

    I watch transmissions from Spur Hill - reception is strong and I have a direct line of sight to the mast. Plus all the audio / video dropout looks like digital artefacts and are definitely as relayed, so I assume they occur either before transmission or during the relay. Analogue degrades so much more gracefully....


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