Interactive distribution system for digital audio-video signals

Details Interactive distribution system for digital audio-video signals Interactive distribution system for digital audio-video signals

1999-02-11

2000-02-29

Faile, Andrew I.

Electrical computers and digital processing systems: multicomput

Remote data accessing

348 12, 348 13, 370394, 370512, H04N 710

Patent

active

060321814

ABSTRACT:
In an interactive audio-video digital distribution system a pointer is transmitted at least once every T milliseconds to indicate the position of a time marker. An interruption (V) occurs every T milliseconds. A given number N of integer frames being transmitted in T milliseconds, there remains only space for transmitting a portion containing R symbols of the N+.sup.th frame before the next interruption. Following transmission of a signaling packet (x) with a pointer indicating a number (x) of symbol periods, during the next interruption N packets will have been completely transmitted since the last pointer, plus R symbols. The end of the transmission of this packet is waited for, that is, U.dbd.C-R symbol periods before a new signaling packet (x-U) is transmitted. The value of the pointer contained in this packet will thus have to take this offset into account as it is decremented by U symbols, that is, x-U, and so on.

REFERENCES:
patent: 5610595 (1997-03-01), Garrabrant et al.
patent: 5778000 (1998-07-01), Dosiere et al.
patent: 5864682 (1999-01-01), Porter et al.
patent: 5878041 (1999-03-01), Yamanaka et al.
patent: 5903263 (1999-05-01), Emura
ETS 300 800 (European Telecommunication Standard) Feb./1997.

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