CN1714570A - 传输系统 - Google Patents

传输系统 Download PDF

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Publication number
CN1714570A
CN1714570A CNA028270037A CN02827003A CN1714570A CN 1714570 A CN1714570 A CN 1714570A CN A028270037 A CNA028270037 A CN A028270037A CN 02827003 A CN02827003 A CN 02827003A CN 1714570 A CN1714570 A CN 1714570A
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signals
mutually corresponding
receiver
corresponding signal
information
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M·C·弗洛特
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Koninklijke Philips NV
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Koninklijke Philips Electronics NV
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4621—Controlling the complexity of the content stream or additional data, e.g. lowering the resolution or bit-rate of the video stream for a mobile client with a small screen
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/38—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space
    • H04H60/41—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4345—Extraction or processing of SI, e.g. extracting service information from an MPEG stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/4508—Management of client data or end-user data
    • H04N21/4516—Management of client data or end-user data involving client characteristics, e.g. Set-Top-Box type, software version or amount of memory available
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/454—Content or additional data filtering, e.g. blocking advertisements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/845—Structuring of content, e.g. decomposing content into time segments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/025—Systems for the transmission of digital non-picture data, e.g. of text during the active part of a television frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/06—Systems for the simultaneous transmission of one television signal, i.e. both picture and sound, by more than one carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/0806—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division the signals being two or more video signals

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Databases & Information Systems (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

本发明涉及包括发射机(12)和接收机(14)的传输系统(10)。发射机(12)被安排成发送多个信号(13)，例如，无线电和/或电视信号。多个信号(13)包括互相相应的信号，例如，同一个频道或节目的模拟和数字信号。替换地，互相相应的信号可包括同一个频道或节目的标准清晰度和高清晰度信号。接收机(14)被安排成接收所述多个信号(13)的至少一部分。发射机(12)被安排成发送标识所述互相相应的信号的信息(15)并且接收机(14)被安排成接收所述信息(15)。接收机(14)包括选择器(16)，用于根据所述信息(15)选择互相相应的信号中的至少一个(17)。这样，接收机(14)可自动选择最适当的信号(17)，例如，用于包括在可提供的频道/节目列表中，或用于重现。

Description

传输系统
本发明涉及包括发射机和接收机的传输系统，发射机被安排成发送多个信号，该多个信号包括互相相应的信号，接收机被安排成接收至少一部分所述多个信号。
本发明还涉及用于发送多个信号的发射机，用于接收多个信号的至少一部分的接收机，用于发送多个信号的方法，和用于接收多个信号的至少一部分的方法。
互相相应的无线电和/或电视信号的同时发送有时被称为同时广播。互相相应的信号可以是按照两个或多个标准(例如，PAL和DVB)的同一个频道/节目的版本，它们在这些标准之间的过渡时间间隔期间被同时发送。替换地，互相相应的信号可以是同一个频道/节目的标准清晰度(SD)和高清晰度(HD)信号。
不是每个接收机都能够接收或处理，例如重现，所有的互相相应的信号。例如，标准清晰度电视接收机通常不能接收和显示高清晰度电视节目。现代接收机被安排成准备好可提供的频道/节目的列表呈现给用户，这样，用户可选择想要的频道/节目。这样的频道/节目表的一个问题在于，它包含对于所有的互相相应的信号的项目，其中可能包括该接收机不能接收或处理的信号。用户因此在该表中发现该接收机不能接收或处理的频道/节目。
本发明的目的是提供按照前言的、没有上述的问题的传输系统。这个目的是在按照本发明的传输系统中达到的，所述传输系统的特征在于，发射机被安排成发送标识所述互相相应的信号的信息以及接收机被安排成接收所述信息，接收机包括选择器，用于根据所述信息选择至少一个互相相应的信号。这样，接收机可自动选择哪个互相相应的信号是最好地适合于包括在该列表中，这样，用户只面对每个频道/节目的单个项目。该选择也可以基于接收机的能力或基于所接收信号的质量。例如，高清晰度电视信号可以用比起与其有关的相应的标准清晰度电视信号较小的功率发送。在坏的接收条件下，高清晰度电视接收机的选择器可以选择标准清晰度电视信号。
当参照附图阅读以下的优选实施例的说明时将更明白本发明的以上的目的和特点，其中：
图1示意地显示按照本发明的传输系统10的实施例。
图1示意地显示按照本发明的传输系统10的实施例。传输系统10包括发射机12和接收机14。发射机12把多个信号13，例如无线电和/或电视信号，发送到接收机14。多个信号13包括互相相应的信号，例如，同一个频道或节目的模拟和数字信号。替换地，互相相应的信号可包括同一个频道或节目的标准清晰度和高清晰度信号。接收机14接收多个信号13的至少一部分。发射机12发送标识所述互相相应的信号的信息15，该信息15被接收机14接收。接收机14包括选择器16，用于根据所述信息15选择至少一个17的互相相应的信号，例如，用于包括在可提供的频道或节目列表中。由选择器16作出的选择也可以基于接收机14的能力，例如只重现SD信号的能力，和/或基于接收信号13的质量。
现在藉助于例子以DVB兼容的系统设置描述互相相应的SD和HD视频业务和标识这些业务的信息的同时广播。DVB是数字电视标准，它在以下的文件中被部分地规定：ETSI EN 300468“Digital VideoBroadcasting(DVB)Specification for Service Information inDVB systems(对于DVB系统中业务信息的数字视频广播(DVB)的技术规范)”。
识别两个任选项以创建对于SD和HD视频业务的同时广播情形：
SD和HD业务实际上是一个DVB业务，在单个输送流中载送两个视频分量作为单业务的两个交替的视频分量。这被称为“单业务配置任选项”
SD和HD业务是在两个不同的输送流中潜在地载送的两个分开的DVB业务(它在不同的频率上和/或具有不同的地理覆盖，例如，使用分级调制或只是为了带宽管理的原因)。这被称为“多业务配置任选项”
单业务配置任选项：
这个任选项需要SD和HD MPEG视频基本流是单业务的一部分。为了信号信息标识互相相应的SD和HD视频流，该分量在描述视频分量的类型(SD或HD)的事件的EIT(事件信息表)中可以被加上标签：分量描述符(component_descriptor)(见上述文件的表12)。相应的视频分量在用于该业务的PMT(节目映射表)中可以加上标签：流识别号描述符(stream_identifier_descriptor)(标签值与EIT中相应的标签域相匹配)。
适当的视频业务的自动选择由接收机根据EIT信令、可提供的类型(SD和/或HD)流和接收机的译码能力来操纵。
多业务配置任选项：
这里规定两个信令任选项来标识业务是仅为HD的：
1.新的业务类型(在SDT(业务描述表)中的service_descriptor中载送的，且在NIT(网络信息表)中的service_list_descriptor中任选的)。
2.在SDT中载送的链接描述符。这个替换例提供与“现有的”HD接收机的较大的兼容性，但与SD接收机的较小的后向兼容性。
多业务配置任选项要求具有实际上相同的内容(分别在SD和HD格式中)的两个业务(在同一个网络上)是可提供的(很可能以不同的复接，但具有相同的network_id)。两个业务的等价性通过使用同一个逻辑频道号(LCN，在用于这两个业务的NIT的logical_channel_descriptor中载送的)被通知。应当指出：为了接收机识别业务的等价性，重要的是这两个业务都在同一个网络上被载送(即，是与同一个network_id有关的)，但二者都在同一输送流上被载送是不重要的。具有同一个LCN、不同的service_id和不同的network_id的业务被认为是区域的变例。
信令任选项1：新的业务类型：
在业务的SD和HD版本之间的差别由在SDT中载送的“service_descriptor”中的“service_type”域表示(并且如果可提供的，在载送NIT的service_list_descriptor中)。对于业务的SD版本，使用业务类型0x01(数字电视)。对于业务的HD版本，可以使用业务类型0x81(由DVB规定的用户，意思是“具有等价的SD业务的数字HD视频业务”)。这个定义允许SD接收机以完全后向兼容的方式忽略仅仅HD的业务，而HD接收机可以容易地不顾同一个业务的SD版本。然而，它确实需要HD接收机知道新的service_type。
信令任选项2：新的链接描述符：
新的类型的linkage_descriptor在SDT中被引入：“SD业务代替链路”。所使用的type_id可以是0x90(DVB用户规定的：意思是“SD代替业务链路”)或可以应用常规的DVB代码(例如，0x12)。它应当在指向等价的SD业务的用于HD业务的SDT中被载送。仅仅SD的接收机可以忽略具有这种链接的业务并使用替代的由该链接指向的SD等价业务。
接着的文本应用到信令任选项1和信令任选项2：HD接收机可以存储业务的两种版本作为在它们的业务列表中的任选项，以及在HD业务的接收质量很差的情形下选择SD业务。SD接收机可以安全地完全忽略仅仅HD的业务。
本发明的范围不限于清楚地公开的实施例。本发明被体现于每个新的特征和这些特性的每个组合中。任何参考符号不必限制权利要求的范围。单词“包括”并不排除存在不同于在权利要求中列出的、其他的单元或标准。在单元前的单字“一”的使用并不排除存在多个这样的单元。

Claims (11)

1.传输系统(10)包括发射机(12)和接收机(14)，发射机(12)被安排成发送多个信号(13)，该多个信号(13)包括互相相应的信号，接收机(14)被安排成接收所述多个信号(13)的至少一部分，其特征在于，发射机(12)被安排成发送标识所述互相相应的信号的信息(15)，以及接收机(14)被安排成接收所述信息(15)，接收机(14)包括选择器(16)，用于根据所述信息(15)选择互相相应的信号中的至少一个(17)。
2.按照权利要求1的传输系统(10)，其特征在于，多个信号(13)包括无线电和/或电视信号。
3.按照权利要求2的传输系统(10)，其特征在于，互相相应的信号(13)涉及到同一个频道或节目。
4.按照权利要求3的传输系统(10)，其特征在于，互相相应的信号(13)包括同一个频道或节目的模拟和数字信号。
5.按照权利要求3或4的传输系统(10)，其特征在于，互相相应的信号(13)包括同一个频道或节目的标准清晰度和高清晰度信号。
6.按照前述权利要求的任一项的传输系统(10)，其特征在于，选择器(16)被安排成选择互相相应的信号中的至少一个(17)，用于包括在可提供的频道或节目列表中。
7.按照前述权利要求的任一项的传输系统(10)，其特征在于，选择器(16)被安排成根据接收机(14)的能力和/或根据所接收信号(13)的质量选择互相相应的信号中的至少一个(17)。
8.发射机(12)，用于发送多个信号(13)，该多个信号(13)包括互相相应的信号，其特征在于，发射机(12)被安排成发送标识所述互相相应的信号的信息(15)。
9.接收机(14)，用于接收多个信号(13)的至少一部分，该多个信号(13)包括互相相应的信号，其特征在于，接收机(14)被安排成接收标识所述互相相应的信号的信息(15)，接收机(14)包括选择器(16)，用于根据所述信息(15)选择互相相应的信号中的至少一个。
10.发送多个信号(13)的方法，该多个信号(13)包括互相相应的信号，其特征在于，该方法包括发送标识所述互相相应的信号的信息(15)。
11.接收多个信号(13)的至少一部分的方法，该多个信号(13)包括互相相应的信号，其特征在于，该方法包括：
-接收标识所述互相相应的信号的信息(15)，以及
-根据所述信息(15)选择互相相应的信号中的至少一个。
CNA028270037A 2002-01-11 2002-12-23 传输系统 Pending CN1714570A (zh)

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JP (1) JP2005514878A (zh)
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CN (1) CN1714570A (zh)
AU (1) AU2002358242A1 (zh)
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