EP 1273175 A2 20030108 - COMPRESSED DIGITAL-DATA SEAMLESS VIDEO SWITCHING SYSTEM
Title (en)
COMPRESSED DIGITAL-DATA SEAMLESS VIDEO SWITCHING SYSTEM
Title (de)
VERMITTLUNGSSYSTEM FÜR NAHTLOS KOMPRIMIERTE DIGITALE VIDEODATEN
Title (fr)
SYSTEME DE COMMUTATION VIDEO SANS SOLUTION DE CONTINUITE POUR DONNEES NUMERIQUES COMPRIMEES
Publication
Application
Priority
- US 9826864 W 19981216
- US 15406998 A 19980916
Abstract (en)
[origin: WO0016544A2] An interactive cable television system is disclosed which utilizes a standard cable television distribution network for simultaneously providing a plurality of viewers with an interactive television program comprising a plurality of signals related in time and content. Video signals are transmitted in a digital format, more than one signal being multiplexed onto a data stream on a single channel. The video signals may be compressed for efficiency. A receiver, in conjunction with a signal selector, selects a particular NTSC channel for playback, then selects a particular video signal from the data stream, and decompresses the video signal for playback. Seamless switching between video signals on different channels is provided. An alternative embodiment is disclosed wherein the various signals which comprise the interactive program are switched at the head end rather than at the receiver. The multiple choice control unit selects a desired signal by relaying the multiple choice selections of the user through a relay box back to a remotely located switching station. The switching station routes the correct video signal down the appropriate cable channel for the particular user.
IPC 1-7
IPC 8 full level
H04N 5/00 (2006.01); H04N 5/44 (2006.01); H04N 5/455 (2006.01); H04N 7/10 (2006.01); H04N 7/16 (2006.01); H04N 7/24 (2006.01); H04N 7/58 (2006.01); H04N 5/445 (2006.01); H04N 5/45 (2006.01); H04N 5/46 (2006.01)
CPC (source: EP KR)
H04N 5/45 (2013.01 - KR); H04N 5/46 (2013.01 - KR); H04N 7/104 (2013.01 - EP); H04N 21/233 (2013.01 - EP); H04N 21/23424 (2013.01 - EP); H04N 21/235 (2013.01 - EP); H04N 21/2365 (2013.01 - EP); H04N 21/2668 (2013.01 - EP); H04N 21/426 (2013.01 - EP); H04N 21/4263 (2013.01 - EP); H04N 21/4305 (2013.01 - EP); H04N 21/4316 (2013.01 - EP); H04N 21/4331 (2013.01 - EP); H04N 21/4347 (2013.01 - EP); H04N 21/435 (2013.01 - EP); H04N 21/4383 (2013.01 - EP); H04N 21/439 (2013.01 - EP); H04N 21/44016 (2013.01 - EP); H04N 21/4532 (2013.01 - EP); H04N 21/458 (2013.01 - EP); H04N 21/6587 (2013.01 - EP); H04N 21/812 (2013.01 - EP); H04N 5/45 (2013.01 - EP); H04N 5/46 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0016544 A2 20000323; WO 0016544 A3 20021031; AU 1831099 A 20000403; AU 774028 B2 20040610; BR 9816020 A 20050628; CA 2343733 A1 20000323; CN 100380961 C 20080409; CN 100380962 C 20080409; CN 1214633 C 20050810; CN 1310919 A 20010829; CN 1533177 A 20040929; CN 1533178 A 20040929; CN 1535012 A 20041006; EP 1273175 A2 20030108; EP 1273175 A4 20030108; GB 0000446 D0 20000301; GB 2349289 A 20001025; GB 2349289 A8 20010214; GB 2349289 B 20010912; HK 1032499 A1 20010720; HK 1038459 A1 20020315; HK 1038460 A1 20020315; HK 1038461 A1 20020315; IL 142033 A0 20020310; JP 2003523103 A 20030729; KR 20010032145 A 20010416; KR 20040000512 A 20040103; KR 20040007730 A 20040124; KR 20040010726 A 20040131; MX PA01000974 A 20020604
DOCDB simple family (application)
US 9826864 W 19981216; AU 1831099 A 19981216; BR 9816020 A 19981216; CA 2343733 A 19981216; CN 200310124846 A 19981216; CN 200310124847 A 19981216; CN 200310124850 A 19981216; CN 98811211 A 19981216; EP 98963253 A 19981216; GB 0000446 A 19981216; HK 01101374 A 20010224; HK 01108296 A 20010224; HK 01108297 A 20010224; HK 01108298 A 20010224; IL 14203398 A 19981216; JP 2000570960 A 19981216; KR 20007005332 A 20000516; KR 20037016462 A 20031216; KR 20037016463 A 20031216; KR 20037016464 A 20031216; MX PA01000974 A 19981216