发明公开
- 专利标题： Video on demand network
- 专利标题（中）： NetzwerkfürVideo auf Anfrage。
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申请号： EP93870084.6申请日： 1993-05-19
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公开(公告)号： EP0625856A1公开(公告)日： 1994-11-23
- 发明人: Verbiest, Willem Jules Antoine , Voeten, Bart Frans , Vermeulen, Christophe Daniel Ghislain , Van Der Putten, Frank Octaaf , Defoort, Frank Cyriel Michel
- 申请人： ALCATEL BELL Naamloze Vennootschap , ALCATEL N.V.
- 申请人地址： Francis Wellesplein 1 B-2018 Antwerpen 1 BE
- 专利权人： ALCATEL BELL Naamloze Vennootschap,ALCATEL N.V.
- 当前专利权人： ALCATEL BELL Naamloze Vennootschap,ALCATEL N.V.
- 当前专利权人地址： Francis Wellesplein 1 B-2018 Antwerpen 1 BE
- 主分类号： H04N7/173
- IPC分类号： H04N7/173
摘要：
A video on demand network (VODN) is proposed which transmits video signals (VS) to user stations (US11, .., US2N) pursuant to the receipt of control signals (CS) issued by these user stations.
In order to optimize the retrieval costs, this video on demand network maintains a large video library in a central video server (CS) and stores locally popular video signals in a plurality of local distributed video servers (DS1/2) from which the latter video signals are transmitted to the user stations. The video signals provided by the local distributed servers are updated from the central server based upon the changing popularity of the video signals.
The present invention proposes in particular to store the video signals in the local distributed servers in random access read/write memories (HDA), e.g. electronic RAMs and magnetic or optical disks, from which the video signals can flexibly be supplied on-line to the user stations and to store the video signals in the central server in sequential access memories, e.g. Digital Audio Tapes (DAT) and CD-ROMs (CDR), providing cheap mass storage.
In order to optimize the retrieval costs, this video on demand network maintains a large video library in a central video server (CS) and stores locally popular video signals in a plurality of local distributed video servers (DS1/2) from which the latter video signals are transmitted to the user stations. The video signals provided by the local distributed servers are updated from the central server based upon the changing popularity of the video signals.
The present invention proposes in particular to store the video signals in the local distributed servers in random access read/write memories (HDA), e.g. electronic RAMs and magnetic or optical disks, from which the video signals can flexibly be supplied on-line to the user stations and to store the video signals in the central server in sequential access memories, e.g. Digital Audio Tapes (DAT) and CD-ROMs (CDR), providing cheap mass storage.
公开/授权文献
- EP0625856B1 Video on demand network 公开/授权日：1998-03-04
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