WO2016138770A1 - 一种实现网络数字视频播放的系统和方法 - Google Patents

一种实现网络数字视频播放的系统和方法 Download PDF

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Publication number
WO2016138770A1
WO2016138770A1 PCT/CN2015/093903 CN2015093903W WO2016138770A1 WO 2016138770 A1 WO2016138770 A1 WO 2016138770A1 CN 2015093903 W CN2015093903 W CN 2015093903W WO 2016138770 A1 WO2016138770 A1 WO 2016138770A1
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video
interface
video data
hdmi
unit
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PCT/CN2015/093903
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English (en)
French (fr)
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崔志伟
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal

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  • This document relates to, but is not limited to, the field of multimedia technology, and in particular, to a system, method and computer readable storage medium for implementing network digital video playback.
  • the IPTV (Internet Protocol Television) set-top box and the OTT (Over The Top) set-top box are the main devices of the home network digital video, and have the functions of acquiring service data, docking the media server, and obtaining the video.
  • Code stream full set of business capabilities for decoding network digital video content.
  • the complete network video program can be clearly seen through the large screen of the television, and the effect of viewing is better.
  • this way of watching network video can only be watched statically, and cannot be moved anytime, anywhere.
  • a mobile phone such as a smart phone or a pad that can be carried around can satisfy the demand for watching a network video program, but the video program can only be watched through the small screen of the mobile terminal itself. Not good.
  • the common practice is to implement multi-screen interaction between the mobile terminal and the set top box through a network connection, such as FIG.
  • 1 is a schematic structural diagram of a network digital video playback device using a set top box, and the specific implementation generally includes: the mobile terminal initiates a service request to a media server in the network, and acquires a code stream of the corresponding video program, first moving The terminal screen performs video playback; the mobile terminal extracts the identification information of the obtained code stream of the video program, and pushes the identification information of the program to the set top box; meanwhile, after receiving the push message from the mobile terminal, the set top box triggers the set top box. Re-initiating a service request to the media server in the network, acquiring a code stream of the corresponding video program, decoding and rendering the obtained video data, and then outputting the video image to the television for playing.
  • the set-top box and the mobile terminal both have a full set of service data processing and digital code stream processing capabilities, and each implements a whole process of service data acquisition, video stream acquisition, and video decoding.
  • an embodiment of the present invention provides a system and method for implementing network digital video playback, which can save device hardware and computing resources, speed up acquisition and playback of network digital video, and thereby enhance user experience of network digital video.
  • An embodiment of the present invention provides a system for implementing network digital video playback, including at least: a host unit and an extension unit, where
  • the host unit is configured to initiate a service request to the media server in the network, decode the code stream of the obtained video program, and send the decoded video data to the extension unit;
  • the expansion unit is configured to render and process the received decoded video data, and output the processed image to the television through the hardware interface for display.
  • the hardware interface is a high definition multimedia interface HDMI, or a digital video interface DVI, or a video graphics array VGA interface, or a separate video S-Video interface.
  • the hardware interface is a high-definition multimedia interface HDMI
  • the expansion unit includes at least a first processing module, a second processing module, and an HDMI interface module;
  • a first processing module configured to receive the video data decoded from the host unit and render the same; the second processing module is configured to adjust an image resolution of the rendered video data; and an HDMI interface module And configured to output the adjusted video data to the television through the HDMI interface.
  • the host unit and the extension unit are grouped in different physical entities, and the host unit is a mobile device;
  • the host unit and the extension unit are disposed in the same physical entity.
  • An embodiment of the present invention further provides a method for implementing network digital video playback, including:
  • the decoded video data is rendered and processed, and the processed image is output to the television through the hardware interface for display.
  • the method before the decoding of the obtained code stream of the video program, the method further includes: searching for the video program to be played, initiating a service request to the media server in the network, and acquiring a code stream of the corresponding video program.
  • the hardware interface is a high definition multimedia interface HDMI, or a digital video interface DVI, or a video graphics array VGA interface, or a separate video S-Video interface.
  • the rendering and processing the decoded video data includes:
  • the embodiment of the present invention further provides a computer readable storage medium, which stores program instructions, and when the program instructions are executed by the processor, implements a method for implementing network digital video playback provided by the embodiments of the present invention.
  • the technical solution of the present invention includes: decoding a code stream of the obtained video program; rendering and processing the decoded video data, and outputting the processed image to a television set for display through a hardware interface,
  • the technical solution provided by the embodiment of the present invention solves the problem that the mobile terminal and the set top box both implement and adopt a completely identical repeated service process in the prior art solution, and the system and method for using the network digital video playing in the embodiment of the present invention It satisfies the needs of users to watch and watch TV screens to the greatest extent, saves equipment hardware and computing resources, shortens the time for users to wait for the acquisition and playback of network digital video, simplifies service complexity, and enhances network numbers.
  • the user experience of the video is satisfies the needs of users to watch and watch TV screens to the greatest extent, saves equipment hardware and computing resources, shortens the time for users to wait for the acquisition and playback of network digital video, simplifies service complexity, and enhances network numbers. The user experience of the video.
  • the host unit may display a friendly user prompting interface to remind the user's operation information, thereby further enhancing the user experience.
  • FIG. 1 is a schematic structural diagram of a structure of a network digital video playback device using a set top box
  • FIG. 2 is a schematic structural diagram of a system for implementing network digital video playback according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method for implementing network digital video playback according to Embodiment 2 of the present invention
  • FIG. 4 is a sequence diagram showing the flow of watching a video using a method for implementing network digital video playback in Embodiment 3 of the present invention.
  • embodiments of the present invention are directed to a system, method, and computer readable storage medium for implementing network digital video playback.
  • the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
  • FIG. 2 is a schematic structural diagram of a system for implementing network digital video playback according to an embodiment of the present invention. As shown in FIG. 2, the method includes at least a host unit 10 and an extension unit 20.
  • the host unit 10 is configured to initiate a service request to the media server in the network, decode the code stream of the obtained video program, and send the decoded video data to the extension unit 21;
  • the expansion unit 20 is configured to render and process the received decoded video data, and output the processed image to the television set 30 for display through a hardware interface.
  • hardware interfaces include High Definition Multimedia Interface (HDMI), Digital Visual Interface (DVI), Video Graphics Array (VGA) interface, and separate video (S). -Video, Separate Video) interface, etc.
  • HDMI High Definition Multimedia Interface
  • DVI Digital Visual Interface
  • VGA Video Graphics Array
  • S separate video
  • -Video Separate Video
  • the expansion unit 20 includes at least a first processing module 201, a second processing module 202, and an HDMI interface module 203;
  • the first processing module 201 is configured to receive the decoded video data from the host unit and render the same;
  • the second processing module 202 is configured to adjust an image resolution of the rendered video data
  • the HDMI interface module 203 is configured to output the adjusted video data to the television set 30 through the HDMI interface.
  • the hardware interface may also adopt a DVI interface; correspondingly, the extension unit includes a first processing module, a second processing module, and a DVI interface module.
  • the hardware interface may also adopt a VGA interface; correspondingly, the extension unit includes a first processing module, a second processing module, and a VGA interface module.
  • the hardware interface may also adopt an S-Video interface; correspondingly, the extension unit includes a first processing module, a second processing module, and an S-Video interface module.
  • the host unit 10 and the extension unit 20 in the embodiment of the present invention may be separated into different physical entities, and the host unit 10 is a mobile device. Alternatively, the host unit 10 and the extension unit 20 in the embodiment of the present invention may also be used. Set in the same physical entity.
  • FIG. 3 is a flowchart of a method for implementing network digital video playback according to an embodiment of the present invention. As shown in FIG. 3, the method at least includes:
  • Step 300 The host unit decodes the code stream of the obtained video program.
  • step 300 to step 302 can be implemented by installing customized software in the host unit 10 provided by the embodiment of the present invention, or can be implemented entirely by a dedicated hardware device and a software system.
  • a specific custom chip integrated with special hardware and hardware corresponding fixed processing logic
  • the CPU in the host unit 10 is not occupied in the process. Calculate ability.
  • connection between the host unit 10 and the extension unit 20 can be connected by wire or wirelessly.
  • the host unit searches for a network video program to be played, such as a common Wifi or 3G/4G network, sends a service request to the media server in the network, and acquires a code stream of the corresponding video program.
  • a network video program to be played such as a common Wifi or 3G/4G network
  • Step 301 The extension unit renders and processes the decoded video data.
  • the processing includes but is not limited to: adjusting the image resolution to adapt to the television screen.
  • the step includes: rendering the decoded video data; adjusting an image resolution of the rendered video data, and outputting to the television 30 through a hardware interface.
  • the hardware interface referred to in the embodiment of the present invention is a high-definition multimedia interface HDMI. In other embodiments, other hardware interfaces may also be used.
  • the processed image is also output to the television through the corresponding hardware interface for display.
  • step 301 how to perform rendering and processing in step 301 is performed by using a related art that is known to those skilled in the art, and is not limited in the embodiment of the present invention.
  • Step 302 The expansion unit outputs the processed image to the television set 30 through the HDMI interface for display.
  • Step 400 The host unit 10 searches for a network video program to be played through a Wifi or 3G/4G network;
  • Step 401 The host unit 10 initiates a service request to the media server 40 in the network, and acquires a code stream of the corresponding video program.
  • Step 402 The host unit 10 itself decodes the obtained code stream of the video program, and transmits the decoded video data to the extension unit 20 through the interface with the extension unit 20;
  • Step 403 After receiving the video data decoded by the host unit, the extension unit 20 renders and processes the video data.
  • the processing includes but is not limited to: adjusting the image resolution to adapt to the television screen.
  • Step 404 The expansion unit 20 outputs the processed image to the television set 30 through the HDMI interface for display.
  • the host unit 10 When the host unit 10 is disconnected from the extension unit 20, the host unit 10 can be provided with its own The decoded data image is displayed on the screen, and this business process is similar to that in the related art when the mobile terminal is used alone.
  • Embodiments of the present invention provide a method and system for implementing network digital video playback, in which a host unit completes acquisition and decoding of a video program code stream, and the extension unit only performs rendering and processing of decoded data corresponding to a TV screen output, saving The hardware and computing resources of the device shorten the time for users to wait for the acquisition and playback of digital video on the network, simplifying the complexity of the service, and enhancing the user experience of the network digital video.
  • the embodiment of the present invention further provides a computer readable storage medium, which stores program instructions, and when the program instructions are executed by the processor, can implement a method for implementing network digital video playback provided by the embodiments of the present invention.
  • Embodiments of the present invention provide a method and system for implementing network digital video playback, which saves device hardware and computing resources, shortens the time for users to wait for acquisition and playback of network digital video, simplifies service complexity, and enhances network numbers. The user experience of the video.

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

Abstract

本发明实施例公开了一种实现网络数字视频播放的系统和方法，包括：主机单元对获得的视频节目的码流解码；扩展单元对解码后的视频数据进行渲染和处理，并将处理后的图像通过硬件接口输出给电视机进行展示。

Description

一种实现网络数字视频播放的系统和方法 技术领域
本文涉及但不限于多媒体技术领域，尤其涉及一种实现网络数字视频播放的系统、方法和计算机可读存储介质。
背景技术
在目前的多媒体信息领域中，交互式网络电视(IPTV，Internet Protocol Television)机顶盒、OTT(Over The Top)机顶盒是家庭网络数字视频的主要设备，其本身具备获取业务数据、对接媒体服务器、获取视频码流、对网络数字视频内容进行解码的全套业务能力。其中，在机顶盒将解码后的视频数据输出给电视机后，即可通过电视机的大屏幕清晰地看到完整的网络视频节目，观影的效果较好。但是，由于电视机庞大，这种观看网络视频的方式只能静置观看，不能随时随地移动。
虽然可以使用便携性较好，可随身携带的智能手机或Pad等移动终端满足观看网络视频节目的需求，但是，只能通过移动终端本身自带的小屏幕进行视频节目的观看，观影的效果不佳。
为了兼容移动终端的便携特性，同时又可以满足在电视机的大屏幕上观看移动终端获取的视频节目，目前的常见做法是，在移动终端与机顶盒之间，通过网络连接实现多屏互动，如图1所示的现有使用机顶盒的网络数字视频播放设备的组成结构示意图，具体实现大致包括：移动终端向网络中的媒体服务器发起业务请求，并获取对应的视频节目的码流，首先在移动终端本屏进行视频播放；移动终端对获得的视频节目的码流的标识信息进行提取，并将该节目的标识信息推送给机顶盒；同时，机顶盒收到来自移动终端的推送消息后，会触发机顶盒重新向网络中的媒体服务器发起业务请求，获取对应的视频节目的码流，并对获得的视频数据进行解码和渲染，然后输出视频图像到电视机进行播放。在上述过程中，机顶盒与移动终端都具备了全套的业务数据处理和数字码流的处理能力，并且各自分别实现了一遍业务数据获取、视频码流获取、视频解码的全过程。在这两次几乎完全一致的业务过程中， 既浪费了设备硬件和计算资源，也延长了用户等待网络数字视频的获取和播放的时间。
发明内容
以下是对本文详细描述的主题的概述，本概述并非是为了限制权利要求的保护范围。
为了解决上述技术问题，本发明实施例提供了一种实现网络数字视频播放的系统和方法，能够节省设备硬件和计算资源，加快网络数字视频的获取和播放，从而增强网络数字视频的用户体验。
本发明实施例提供了一种实现网络数字视频播放的系统，至少包括：主机单元、扩展单元，其中，
主机单元，设置为向网络中的媒体服务器发起业务请求，对获得的视频节目的码流解码，将解码后的视频数据发送给扩展单元；
扩展单元，设置为对接收到的解码后的视频数据进行渲染和处理，将处理后的图像通过硬件接口输出给电视机进行展示。
可选地，所述硬件接口为高清晰度多媒体接口HDMI、或数字视频接口DVI、或视频图形阵列VGA接口、或分离视频S-Video接口。
可选地，所述硬件接口为高清晰度多媒体接口HDMI；所述扩展单元至少包括第一处理模块、第二处理模块和HDMI接口模块；其中，
第一处理模块，设置为接收来自所述主机单元解码后的所述视频数据，并对其进行渲染；第二处理模块，设置为调整所述渲染后的视频数据的图像分辨率；HDMI接口模块，设置为将调整后的所述视频数据通过所述HDMI接口输出给电视机。
可选地，所述主机单元和所述扩展单元分设在不同的物理实体中，且所述主机单元为可移动的设备；
或者，所述主机单元和所述扩展单元设置在同一物理实体中。
本发明实施例还提供了一种实现网络数字视频播放的方法，包括：
对获得的视频节目的码流解码；
对解码后的视频数据进行渲染和处理，并将处理后的图像通过硬件接口输出给电视机进行展示。
可选地，在上述对获得的视频节目的码流解码之前还包括：搜索要播放的所述视频节目，向网络中的媒体服务器发起业务请求，并获取对应的所述视频节目的码流。
可选地，所述硬件接口为高清晰度多媒体接口HDMI、或数字视频接口DVI、或视频图形阵列VGA接口、或分离视频S-Video接口。
可选地，所述对解码后的视频数据进行渲染和处理包括：
对所述解码后的视频数据进行渲染；调整所述渲染后的视频数据的图像分辨率。
本发明实施例还提供一种计算机可读存储介质，存储有程序指令，当该程序指令被处理器执行时实现本发明实施例所提供的一种实现网络数字视频播放的方法。
与现有技术相比，本发明技术方案包括：对获得的视频节目的码流解码；对解码后的视频数据进行渲染和处理，并将处理后的图像通过硬件接口输出给电视机进行展示，通过本发明实施例提供的技术方案，解决了现有技术方案中移动终端和机顶盒都实现并采用几乎完全一致的重复的业务过程的问题，本发明实施例使用一种网络数字视频播放的系统和方法最大程度地满足了用户移动观看和静置观看电视屏幕的需求，节省了设备硬件和计算资源，缩短了用户等待网络数字视频的获取和播放的时间，简化了业务复杂度，从而增强了网络数字视频的用户体验。
可选地，当用户在电视屏幕上观看视频节目时，主机单元可展示友好的用户提示界面，对用户的操作信息进行提醒，进一步增强了用户体验。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图概述
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部 分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1为现有使用机顶盒的网络数字视频播放设备的组成结构示意图；
图2为本发明实施例中一种实现网络数字视频播放的系统的组成结构示意图；
图3为本发明实施例二中一种实现网络数字视频播放的方法的流程图；
图4为使用本发明实施例三中采用一种实现网络数字视频播放的方法观看视频的流程时序图。
本发明的较佳实施方式
针对上述情况，本发明实施例旨在提供一种实现网络数字视频播放的系统、方法和计算机可读存储介质。下面结合说明书附图对本发明的具体实施方式进行详细说明。
实施例一
图2为本发明实施例提供的一种实现网络数字视频播放的系统的组成结构示意图，如图2所示，至少包括：主机单元10、扩展单元20。
主机单元10，设置为向网络中的媒体服务器发起业务请求，对获得的视频节目的码流解码，将解码后的视频数据发送给扩展单元21；
扩展单元20，设置为对接收到的解码后的视频数据进行渲染和处理，将处理后的图像通过硬件接口输出给电视机30进行展示。
在实际应用中，硬件接口包括高清晰度多媒体接口(HDMI，High Definition Multimedia Interface)、数字视频接口(DVI，Digital Visual Interface)、视频图形阵列(VGA，Video Graphics Array)接口，以及分离视频(S-Video，Separate Video)接口等。本实施例中采用的是应用范围较广的高清晰度多媒体接口HDMI。
可选地，扩展单元20至少包括第一处理模块201、第二处理模块202和HDMI接口模块203；其中，
第一处理模块201，设置为接收来自主机单元解码后的视频数据，并对其进行渲染；
第二处理模块202，设置为调整渲染后的视频数据的图像分辨率；
HDMI接口模块203，设置为将调整后的视频数据通过HDMI接口输出给电视机30。
可选地，在其他实施例中，硬件接口也可以采用DVI接口；相应地，扩展单元包括第一处理模块、第二处理模块和DVI接口模块。
可选地，在其他实施例中，硬件接口也可以采用VGA接口；相应地，扩展单元包括第一处理模块、第二处理模块和VGA接口模块。
可选地，在其他实施例中，硬件接口也可以采用S-Video接口；相应地，扩展单元包括第一处理模块、第二处理模块和S-Video接口模块。
本发明实施例中的主机单元10和扩展单元20可以分设在不同的物理实体中，且主机单元10是一可移动的设备，或者，本发明实施例中的主机单元10和扩展单元20也可以设置在同一物理实体中。
实施例二
图3为本发明实施例提供的一种实现网络数字视频播放的方法的流程图，如图3所示，至少包括：
步骤300：主机单元对获得的视频节目的码流进行解码；
在实际应用中，可以通过在本发明实施例提供的主机单元10中安装定制的软件来实现步骤300～步骤302，也可以完全由专门的硬件设备和软件系统来实现。本实施例中采用由专门的定制芯片(集成了专门的硬件和硬件对应的固定处理逻辑)来实现视频解码、渲染这一特定业务，其中，在该过程中并不占用主机单元10中CPU的计算能力。
其中，主机单元10与扩展单元20之间的连接可以通过有线方式，或用无线方式进行连接。
在步骤300之前还包括：主机单元搜索要播放的网络视频节目，如常见的通过Wifi或3G/4G网络等；向网络中的媒体服务器发起业务请求，并获取对应的视频节目的码流。
步骤301：扩展单元对解码后的视频数据进行渲染和处理；
其中，处理包括但不限于：调整图像分辨率，以适配电视屏幕。
可选地，本步骤包括：对解码后的视频数据进行渲染；调整渲染后的视频数据的图像分辨率，并通过硬件接口输出给电视机30。本发明实施例中所指的硬件接口为高清晰度多媒体接口HDMI；在其他实施例中，也可以采用其他硬件接口，后续，处理后的图像也通过对应的硬件接口输出给电视机进行展示。
需要说明的是，步骤301中如何进行渲染和处理采用本领域技术人员了解的相关技术，在本发明实施例中不进行限定。
步骤302：扩展单元将处理后的图像通过HDMI接口输出给电视机30进行展示。
实施例三
下面结合附图4来详细阐述使用本发明实施例提供的网络数字视频播放的方法观看视频的主要流程，如图4所示，本实施例中，假设主机单元与扩展单元连接，扩展单元与电视机连接，具体实现过程大致如下：
步骤400：主机单元10通过Wifi或3G/4G网络搜索要播放的网络视频节目；
步骤401：主机单元10向网络中的媒体服务器40发起业务请求，并获取对应的视频节目的码流；
步骤402：主机单元10自身对获得的视频节目的码流进行解码，将解码后的视频数据通过与扩展单元20之间的接口，发送给扩展单元20；
步骤403：扩展单元20在接收到主机单元解码后的视频数据之后，对视频数据进行渲染和处理；
其中，处理包括但不限于：调整图像分辨率，以适配电视屏幕。
步骤404：扩展单元20将处理后的图像通过HDMI接口输出给电视机30进行展示。
当主机单元10与扩展单元20断开连接时，主机单元10可在其自带的 屏幕上展示解码后的数据图像，这种业务流程与相关技术中单独使用移动终端时类似。
在本发明实施例中，通过主机单元10与扩展单元20的结合使用，达到将主机单元10获得的视频图像直接在电视机屏幕上展示的效果，解决了现有技术方案中移动终端和机顶盒都实现并采用几乎完全一致的重复的业务过程的问题。本发明实施例提供一种实现网络数字视频播放的方法和系统，由主机单元完成视频节目码流的获取和解码，扩展单元只完成与电视屏幕输出相对应的解码后数据的渲染和处理，节省了设备硬件和计算资源，缩短了用户等待网络数字视频的获取和播放的时间，简化了业务复杂度，从而增强了网络数字视频的用户体验。
本发明实施例还提供一种计算机可读存储介质，存储有程序指令，当该程序指令被处理器执行时可实现本发明实施例所提供的一种实现网络数字视频播放的方法。
工业实用性
在本发明实施例中，通过主机单元与扩展单元的结合使用，达到将主机单元获得的视频图像直接在电视机屏幕上展示的效果，解决了现有技术方案中移动终端和机顶盒都实现并采用几乎完全一致的重复的业务过程的问题。本发明实施例提供一种实现网络数字视频播放的方法和系统，节省了设备硬件和计算资源，缩短了用户等待网络数字视频的获取和播放的时间，简化了业务复杂度，从而增强了网络数字视频的用户体验。

Claims (9)

  1. 一种实现网络数字视频播放的系统，包括：主机单元、扩展单元，其中，
    所述主机单元，设置为向网络中的媒体服务器发起业务请求，对获得的视频节目的码流解码，将解码后的视频数据发送给扩展单元；
    所述扩展单元，设置为对接收到的解码后的视频数据进行渲染和处理，将处理后的图像通过硬件接口输出给电视机进行展示。
  2. 根据权利要求1所述的系统，其中，所述硬件接口为高清晰度多媒体接口HDMI、或数字视频接口DVI、或视频图形阵列VGA接口、或分离视频S-Video接口。
  3. 根据权利要求1所述的系统，其中，所述硬件接口为高清晰度多媒体接口HDMI；所述扩展单元包括第一处理模块、第二处理模块和HDMI接口模块；其中，
    所述第一处理模块，设置为接收来自所述主机单元解码后的所述视频数据，并对所述视频数据进行渲染；所述第二处理模块，设置为调整所述渲染后的视频数据的图像分辨率；所述HDMI接口模块，设置为将调整后的所述视频数据通过所述HDMI接口输出给电视机。
  4. 根据权利要求3所述的系统，其中，
    所述主机单元和所述扩展单元分设在不同的物理实体中，且所述主机单元为可移动的设备；
    或者，所述主机单元和所述扩展单元设置在同一物理实体中。
  5. 一种实现网络数字视频播放的方法，包括：
    对获得的视频节目的码流解码；
    对解码后的视频数据进行渲染和处理；
    将处理后的图像通过硬件接口输出到电视机进行展示。
  6. 根据权利要求5所述的方法，其中，在所述对获得的视频节目的码流解码之前还包括：向媒体服务器发起业务请求，搜索要播放的所述视频节目， 并获取对应的所述视频节目的码流。
  7. 根据权利要求5所述的方法，其中，所述硬件接口为高清晰度多媒体接口HDMI、或数字视频接口DVI、或视频图形阵列VGA接口、或分离视频S-Video接口。
  8. 根据权利要求5所述的方法，其中，所述对解码后的视频数据进行渲染和处理包括：
    对所述解码后的视频数据进行渲染；调整所述渲染后的视频数据的图像分辨率。
  9. 一种计算机可读存储介质，存储有程序指令，当该程序指令被执行时可实现权利要求5-8任一项所述的方法。
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