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Patent EP0482802A2 successfully refreshed from Google Patents.
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EP0482802A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Automatic transmission systems for television and radio broadcasting

Assignee: Sony Australia Ltd
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Filing: 1991-10-10
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Granted: —
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Expires: 2011-10-10
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Abstract

Abstract A method of merging playlists each for a single channel for simultaneous transmission over a network by a multi-channel automatic transmission over a network by a multi-channel automatic transmission system (1) replaces the functions previously performed in a network studio (100) by a number of single channel automatic transmission systems (111, 112, 113 ...) corresponding to a number of regional transmitters (101, 102, 103 ...). Any proposed merging is checked before the merged playlist is completed. The checking takes the form of two sequentially applied tests. The first test is that the required number of cassette changes be less than or equal to a calculatable maximum number. The second test is that for each channel, for each event other than the first event on the playlist, the sum of the cumulative thread, cue and pre-roll times and the elevator movement times be less than or equal to the sum of the total event durations including the event being checked less the total of the previous event durations for that channel.

Inventors

  • 👤 Neil Witheridge
  • 👤 Tapas Kumar Debray

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-03 20:55
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/002; G11B15/00; G11B15/675; G11B15/68; G11B15/689; H; H04; H04H; H04H60/00; H04H60/02; H04H60/06; G11B2220/00; G11B2220/40; G11B2220/41; G11B2220/90

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 124 words
A method of merging a plurality of playlists each for a single channel and of equal length into a single playlist for simultaneous multi-channel transmission, said method comprising the steps of: determining the maximum number of cassette changes able to be performed during the playlist length and checking that the required number of cassette changes is less than or equal to said maximum number, and, if so, checking that for each event for each channel other than the first event, the sum of the cumulative thread, cue and pre-roll times, and the elevator movement times is less than or equal to the sum of the total event durations including the event being checked less the total of the previous event durations for that channel.
Claim 2
Dependent Claim 79 words
A method according to claim 1 wherein the maximum number of cassette changes able to be performed during the playlist length is determined by adding in seconds the sum of the minimum post-roll time, rewind time and eject time to the sum of the minimum thread time, cue time and pre-roll time; subtracting the result thereby obtained from the duration of the commercial break; dividing the result thereby obtained by the maximum elevator service time, and subtracting four therefrom.
Claim 3
Dependent Claim 53 words
A method according to claim 2 wherein numerical values in seconds of the thread time, cue time, pre-roll time, post-roll time, rewind time, eject time and elevator service time are selected in accordance with the known performance of the cartridge access and retrieval device intended to be used for said simultaneous multi-channel transmission.
Claim 4
Dependent Claim 25 words
A method according to claim 1, claim 2 or claim 3 wherein said playlists are merged prior to operation of a multi-channel automatic transmission system.

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