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公开(公告)号:EP0625856A1
公开(公告)日:1994-11-23
申请号:EP93870084.6
申请日:1993-05-19
发明人: Verbiest, Willem Jules Antoine , Voeten, Bart Frans , Vermeulen, Christophe Daniel Ghislain , Van Der Putten, Frank Octaaf , Defoort, Frank Cyriel Michel
IPC分类号: H04N7/173
CPC分类号: H04N21/2747 , H04N7/17336 , H04N7/17354
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.摘要翻译: 提出了一种视频点播网络(VODN),其根据由这些用户站发出的控制信号(CS)的接收,向用户站(US11,...,US2N)发送视频信号(VS)。 为了优化检索成本,该视频点播网络在中央视频服务器(CS)中维护大型视频库,并将本地流行的视频信号存储在多个本地分布式视频服务器(DS1 / 2)中,后者的视频 信号被发送到用户站。 基于视频信号的变化的流行度,由中央服务器更新本地分布式服务器提供的视频信号。 本发明特别提出将视频信号存储在随机存取读/写存储器(HDA)中的本地分布式服务器中。 电子RAM和磁盘或光盘,视频信号可以从其中灵活地在线提供给用户站,并将视频信号存储在中央服务器中,例如连续访问存储器中。 数字音频磁带(DAT)和CD-ROM(CDR),提供便宜的大容量存储。
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公开(公告)号:EP0625857B1
公开(公告)日:1998-06-24
申请号:EP93870085.3
申请日:1993-05-19
发明人: Voeten, Bart Frans , Vermeulen, Christophe Daniel Ghislain , Van Der Putten, Frank Octaaf , Defoort, Frank Cyriel Michel
CPC分类号: H04N21/21 , H04L29/06 , H04N7/17336 , H04N21/23
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3.
公开(公告)号:EP0625858A1
公开(公告)日:1994-11-23
申请号:EP93870086.1
申请日:1993-05-19
发明人: Voeten, Bart Frans , Vermeulen, Christophe Daniel Ghislain , Van Der Putten, Frank Octaaf , Defoort, Frank Cyriel Michel
CPC分类号: H04N21/21 , G11C7/00 , H04N7/17336 , H04N7/17345 , H04N21/23
摘要: The present invention relates to a video server memory management for a video server transmitting video signals (VS) to user stations in response to control signals issued by these stations.
This method includes the steps of providing a memory constituted by a plurality of random access memories (HD1/../HD4) and subdividing each of said video signals in a plurality of distinct blocks (BL1/../BLQ) each typically corresponding to less than a second of the video signal. It is further proposed to include in this method the step of storing any two blocks (BL1/../BLQ) which normally are to be consecutively retrieved from the memory in distinct random access memories (HD1/../HD4).
In this way the full interactive video on demand service, giving the user stations control over the way in which the blocks are retrieved from the memory, is improved as is the rate at which a predetermined sequence of blocks is retrieved from the memory.摘要翻译: 视频服务器存储器管理技术领域本发明涉及视频服务器存储器管理,用于响应于这些站发出的控制信号,向用户站发送视频信号(VS)的视频服务器。 该方法包括以下步骤:提供由多个随机存取存储器(HD1 / ... / HD4)构成的存储器,并将每个所述视频信号细分为多个不同的块(BL1 / ... / BLQ),每个块通常对应于 不到视频信号的一秒钟。 进一步提出,在该方法中包括存储通常在不同随机存取存储器(HD1 / ... / HD4)中从存储器连续检索的任何两个块(BL1 / ... / BLQ)的步骤。 以这种方式,完整的交互式视频点播服务,使得用户站对从存储器检索块的方式进行控制,以及从存储器检索预定的块序列的速率得到改善。
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公开(公告)号:EP0625857A1
公开(公告)日:1994-11-23
申请号:EP93870085.3
申请日:1993-05-19
发明人: Voeten, Bart Frans , Vermeulen, Christophe Daniel Ghislain , Van Der Putten, Frank Octaaf , Defoort, Frank Cyriel Michel
CPC分类号: H04N21/21 , H04L29/06 , H04N7/17336 , H04N21/23
摘要: The present invention relates to a video server (DS) for transmitting video signals (VS) to user stations in response to the receipt of control signals issued by these user stations and including a plurality (HDA) of memories (HDASA, HDASB) which are controlled by a plurality of memory controllers (OBC, SCSIC-A/B).
It is proposed to control the memory controllers based on said control signals by a server control means (DSC, PCM1/PCMN) which includes a server controller (DSC) and a plurality of program control modules (PCM1/PCMN) each of which is associated to a subset (HDA1/HDAN) of said plurality (HDA) of memories (HDASA, HDASB) and to a subset of said plurality of memory controllers (OBC, SCSIC-A/B).
This server control means is kept relatively simple if said server controller activates for each requested video signal the program control module in which associated subset of memories this video signal is stored and if this program control module, upon being activated, operates its associated memory controllers to achieve said transmission.摘要翻译: 本发明涉及一种视频服务器(DS),用于响应于由这些用户站发出的控制信号的接收并且包括多个(HDA)存储器(HDASA,HDASB),用于向用户站发送视频信号(VS) 由多个存储器控制器(OBC,SCSIC-A / B)控制。 提出了通过服务器控制装置(DSC,PCM1 / PCMN)基于所述控制信号来控制存储器控制器,该服务器控制装置包括服务器控制器(DSC)和多个程序控制模块(PCM1 / PCMN),每个程序控制模块 到所述多个(HDA)存储器(HDASA,HDASB)的子集(HDA1 / HDAN)和所述多个存储器控制器(OBC,SCSIC-A / B)的子集。 如果所述服务器控制器为每个所请求的视频信号激活程序控制模块,则该服务器控制装置保持相对简单,在该程序控制模块中存储该视频信号的存储器的相关子集,并且如果该程序控制模块在被激活时将其相关的存储器控制器操作到 实现所述传输。
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