WO2015074445A1 - 多路无线显示方法及装置 - Google Patents

多路无线显示方法及装置 Download PDF

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Publication number
WO2015074445A1
WO2015074445A1 PCT/CN2014/084673 CN2014084673W WO2015074445A1 WO 2015074445 A1 WO2015074445 A1 WO 2015074445A1 CN 2014084673 W CN2014084673 W CN 2014084673W WO 2015074445 A1 WO2015074445 A1 WO 2015074445A1
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Prior art keywords
video
image
channel
display
matching pair
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PCT/CN2014/084673
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English (en)
French (fr)
Inventor
李小江
张磊
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中兴通讯股份有限公司
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Publication of WO2015074445A1 publication Critical patent/WO2015074445A1/zh

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Classifications

    • 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
    • H04N21/4622—Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • 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
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/43615—Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals
    • 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
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43637—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]

Definitions

  • Wireless display is a technology for displaying an image on a display side by wireless means.
  • the wireless transmission method of image information can be divided into two types in terms of content: One is to transmit a video data packet, and its working mode is: At the video transmitting end, the video stream is first compressed, and then transmitted in the form of a data packet. To the receiving end, the receiving end reassembles and decompresses after receiving the data packet, and finally restores the image. Since compression and decompression take time, there is inevitably a certain delay when transmitting images using this method.
  • Wi-Fi Display by Wi-Fi Aliance Apple's AirPlay Mirroring and Intel's WiDi.
  • the other is to directly transmit the video stream. This method does not need to compress and decompress the video stream, so there is no delay, but the data bandwidth consumed during transmission is very high.
  • WHDI technology the representative one is WHDI technology.
  • Wi-Fi Display has been recognized by many manufacturers due to its low latency and roundabout nature. Most smartphones may come standard with Wi-Fi Display in the future.
  • Wi-Fi Display is a wireless transmission standard for the image source device (Source) to the sink device (Sink). A pair of devices directly connected through the standard will form an "One Source - One Sink" interaction. When the source end does not need a connection line, the HD image can be synchronized to the Sink side display.
  • the technology has considerable prospects and is widely used. For example, (1) Users can "project" HD movies that are being played on a mobile phone to a TV or HD display to achieve high-definition image display in a home theater; (2) In a conference room, through a laptop and a wireless display The Wi-Fi Display interconnect allows you to synchronize the conference content in your notebook to the wireless display for projection.
  • Wi-Fi Display-enabled sender devices for example, Samsung's GT-I9300 and OPPO's Find 5
  • receiver devices for example, Huawei Box and WiPlug
  • the one-to-one Wi-Fi Display interaction mode is adopted, two pairs of transmitting and receiving devices are required to achieve the contrast effect, which requires excessive consumption of hardware resources. If only one receiving device is used, under the condition of hard connection of one sending and one receiving, the method of switching the video source in turn respectively displays the screen of two mobile phones or one solution of the same function of a certain mobile phone, although there is no need to add more many The receiving device can meet the needs of the conference projection display, but the switching process will disrupt the conference rhythm and can not meet the needs of people's comparison. In view of the related art Wi-Fi Display - the one-way interactive mode only supports the problem of insufficient application of single-channel display, and no effective solution has been proposed yet.
  • a multi-channel wireless display method including: receiving a plurality of video streams from a plurality of video sources; performing video processing on the plurality of video streams according to a preset matching pair to obtain a video data packet
  • the matching pair is a correspondence between the video source and a channel bit corresponding to the video source
  • the video processing includes: image stitching and compression encoding; sending the video data packet to the wireless display for multi-channel wireless display.
  • the method before receiving the multiple video streams from the plurality of video sources, includes: assigning each video source a unique identifier according to a MAC address of each video source.
  • the method further includes: setting a channel bit for the channel corresponding to each video source; and uniquely identifying each video source with a corresponding The channel bits are bound to form a matching pair, and the matching pairs are stored in a hash table.
  • performing video processing on the multiple video streams according to the preset matching pair includes: determining, according to the matching pair, whether there is a channel bit with no unique identifier mounted, and if present, setting the preset default image as the channel bit display The image, if not present, performs image stitching on the plurality of video streams according to the order of receiving the multiple video streams according to the matching pair; and compresses and decodes the image signal capable of displaying the multi-picture obtained by the image stitching.
  • image stitching comprises: image preprocessing, registration, modeling, and fusion reconstruction.
  • a multi-channel wireless display device comprising: a receiving module configured to receive a plurality of video streams from a plurality of video sources; and a processing module configured to be paired according to a preset matching pair
  • the video stream is processed by the video stream to obtain a video data packet, where the matching pair is a correspondence between the video source and a channel bit corresponding to the video source, and the video processing includes: image stitching and compression encoding; the sending module is set to the video
  • the data packet is sent to the wireless display for multi-channel wireless display.
  • the apparatus further comprises: an allocation module configured to assign a unique identifier to each video source according to a MAC address of each video source.
  • the apparatus further comprises: a setting module, configured to set a channel bit for a channel corresponding to each video source; and a binding storage module, configured to bind the unique identifier of each video source to a corresponding channel bit to form Match the pair and store the matching pair in the hash table.
  • a setting module configured to set a channel bit for a channel corresponding to each video source
  • a binding storage module configured to bind the unique identifier of each video source to a corresponding channel bit to form Match the pair and store the matching pair in the hash table.
  • the processing module includes: a determining unit, configured to determine, according to the matching pair, whether there is a channel bit in which the unique identifier is not mounted; and the processing unit is configured to, when the determination result is yes, use the preset default image as the channel
  • image stitching comprises: image preprocessing, registration, modeling, and fusion reconstruction.
  • a video processing operation such as image stitching of a plurality of video streams is performed according to a correspondence relationship between a preset video source and a corresponding channel bit, and the video data packet obtained by the video processing is transmitted to the wireless display for multi-channel wireless operation.
  • the display method solves the problem that the Wi-Fi Display one-to-one interaction mode only supports the single-channel display application in the related art, and achieves the effect of realizing the wireless display function of the multi-channel high-definition image.
  • FIG. 1 is a flow chart of a multi-channel wireless display method according to an embodiment of the present invention
  • FIG. 2 is a block diagram showing a structure of a multi-channel wireless display device according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of networking of a multi-channel wireless display device based on Wi-Fi Display technology according to a preferred embodiment of the present invention
  • FIG. 5 is a Wi-Fi based on a preferred embodiment of the present invention.
  • FIG. 6 is a flowchart showing a main service implementation of a multi-channel wireless display method based on Wi-Fi Display technology according to a preferred embodiment of the present invention.
  • BEST MODE FOR CARRYING OUT THE INVENTION will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
  • the embodiment of the invention mainly relates to a method and a device for implementing multi-channel wireless display based on Wi-Fi Display technology in the field of wireless display. Of course, it is not limited to this in practical applications, and can be completely applied to other methods.
  • Step S102 receiving multiple channels of video from multiple video sources.
  • Step S104 Perform video processing on the multi-channel video stream according to the preset matching pair to obtain a video data packet, where the matching pair is a correspondence between the video source and a channel bit corresponding to the video source, and the video processing includes: Image splicing and compression coding;
  • Step S106 transmitting the video data packet to the wireless display for multi-channel wireless display.
  • the video processing operation such as image stitching of the multiple video streams may be performed according to the correspondence between the preset video source and the corresponding channel bit, and the video data packet obtained by the video processing is sent to the wireless display for multiplexing.
  • Wireless display in this way, wireless display function of multi-channel high-definition images can be realized.
  • each video source may be assigned a unique identifier according to the MAC address of each video source. Further, channel bits may be set for the channel corresponding to each video source, and then The unique identifier of each video source is bound to the corresponding channel bit to form a matching pair, and the matching pair is stored in the hash table. In this way, it is convenient to use the matching pair later.
  • step S104 can be implemented by first determining whether there is a channel bit with no unique identifier mounted according to the matching pair, and if present, the preset default image can be used as the display image of the channel bit, if If the data is not present, the multiple video streams may be image-spliced according to the order of the received multiple video streams.
  • image signals of the displayable multi-picture obtained by the image stitching may be compression-decoded.
  • image stitching may include: image preprocessing, registration, modeling, and fusion reconstruction. Of course, it is not limited to this in practical applications. If there is a specific need for video that needs to be displayed wirelessly, other video processing operations may be added during the image stitching process.
  • the embodiment of the invention provides a multi-channel wireless display device for implementing the multi-channel wireless display method provided by the above embodiments.
  • FIG. 2 is a structural block diagram of a multi-channel wireless display device according to an embodiment of the present invention. As shown in FIG.
  • the device mainly includes: a receiving module 10, a processing module 20, and a transmitting module 30.
  • the receiving module 10 is configured to receive multiple video streams from multiple video sources.
  • the processing module 20 is configured to perform video processing on the multiple video streams according to a preset matching, to obtain a video data packet, where the matching pair It is a correspondence between a video source and a channel bit corresponding to the video source, and the video processing includes: image stitching and compression encoding; and the sending module 30 is configured to send the video data packet to the wireless display for multi-channel wireless display.
  • 3 is a structural block diagram of a preferred multi-channel wireless display device according to an embodiment of the present invention. As shown in FIG.
  • the preferred multi-channel wireless display device may further include: an allocating module 40, configured to be based on a MAC address of each video source. Assign a unique identifier to each video source.
  • the apparatus may further include: a setting module 50 configured to set a channel bit for a channel corresponding to each video source; and a binding storage module 60 configured to perform a unique identifier of each video source with a corresponding channel bit The binding forms a matching pair and stores the matching pair in a hash table.
  • the processing module 20 includes: a determining unit 22, configured to determine whether there is a channel bit that does not have a unique identifier mounted according to the matching pair; and the processing unit 24 is set to be in the case that the determination result is yes. , the preset default image is used as the display image of the channel bit, and if the determination result is no, the image is spliced according to the matching pair in the order of receiving the multiple video streams, and the image is stitched together.
  • the image signal of the multi-picture can be displayed for compression decoding.
  • the image mosaic may specifically include: image preprocessing, registration, modeling, and fusion reconstruction.
  • the multi-channel wireless display method and device provided by the foregoing embodiments solve the problem that the Wi-Fi Display one-to-one interaction mode only supports the single-channel display generation application in the related art, and can realize the wireless display function of the multi-channel high-definition image.
  • the multi-channel wireless display method and apparatus provided by the foregoing embodiments are further described and illustrated in detail below with reference to FIG. 3 to FIG. 6 and a preferred embodiment.
  • the preferred embodiment mainly provides a multi-channel wireless display method and device based on the Wi-Fi Display technology.
  • the mobile phone terminal is used as a video source, and the following is taken as an example.
  • the Wi-Fi Display technology According to the content of the background art, the Wi-Fi Display--one interactive mode is actually a one. Send a wireless transmission method. A brief overview of its workflow is the following steps:
  • the Screen information is captured by the Source, and the Screen information is H.264 encoded and compressed.
  • the source end sends the compressed data packet to the Sink terminal through WiFi or TDLS;
  • the Sink side restores the Screen information through steps such as decompression and H.264 decoding; (5) Finally, the Sink side projects the Screen information onto the display corresponding to the Sink end.
  • the interaction between the source side and the Sink side has the following characteristics: (1) The image information is simply transmitted from the Source side to the Sink side, and only the codec processing is performed in the middle, and the image does not undergo content or image quality changes. The way the image displayed on the Sink side is completely dependent on the Source side. (2) Only one-way image is transmitted from the Source to the Sink. In the existing one-to-one transmission and reception environment, multi-channel display effects cannot be achieved. (3) The existing Wi-Fi Display technology does not support a Sink to simultaneously interconnect multiple Sources and synchronize multiple Source images.
  • the source end must be used as a starting point for solving the problem, and a device capable of implementing multi-channel wireless display (that is, the multi-channel based on Wi-Fi Display technology provided by the preferred embodiment) is added.
  • the wireless display device can make up for the lack of application of the Wi-Fi Display to support only one-way display, which is the main idea of the technical solution of the preferred embodiment.
  • the multi-channel wireless display device based on Wi-Fi Display technology can accept image information of multiple video sources, and perform activities such as message control, video processing, and operation parameter display;
  • the multi-channel wireless display device of the Wi-Fi Display technology can serve as a one-to-one interaction between the source and the sink.
  • the multi-channel video source will not be used as the source, but the Wi-Fi display technology based on the embodiment of the present invention.
  • the multi-channel wireless display device interacts indirectly with Sink.
  • the multi-channel wireless display device based on the Wi-Fi Display technology provided by the preferred embodiment mainly includes: a video accepting unit, a control unit, a video processing unit, a video transmitting unit, a storage unit, and a network service unit.
  • the networking mode is to establish a dual network environment through its internal network service unit.
  • the network service unit includes a dual network card.
  • One end of the dual network card exists as a wireless AP (Access Point), and the multi-channel wireless display based on Wi-Fi Display technology is installed.
  • each video source for example, a mobile phone terminal or a tablet (tablet)
  • each video source for example, a mobile phone terminal or a tablet (tablet)
  • each video source for example, a mobile phone terminal or a tablet (tablet)
  • each video source for example, a mobile phone terminal or a tablet (tablet)
  • FIG. 4 is a networking diagram of a multi-channel wireless display device based on a Wi-Fi Display technology according to a preferred embodiment of the present invention, and accepts a video stream sent by each video source through a standard such as WHDI.
  • the connection process generally includes the following steps: (1) Log in to the IE management interface, set the IP address of the wireless AP to be static and the key; (2) manually assign a static IP to the video source device, enable the wireless connection function, and search for the AP device; 3) Enter the key and send the connection request. After the AP completes the verification, it is allowed to access.
  • the other end of the dual network card is used for Wi-Fi Display interconnection between the device and the Sink terminal, and the processed video data packet is sent to the Sink terminal for projection display.
  • the control unit provided in the device can perform the tasks of scheduling and monitoring of the dual network, and mainly includes allocating an access mode adapted to the two ends of the device (one end is a wireless AP, forming a one-to-many type wireless local area network, and the other end is a Wi. -Fi Display, which forms a point-to-point direct connection), manages the flow of video data in the network, monitors the connection status of terminals in the network, and controls the operation of other auxiliary units through messages.
  • the multi-channel wireless display device based on Wi-Fi Display technology provided by the preferred embodiment is further described below.
  • FIG. 5 is a schematic diagram showing the internal structure of a multi-channel wireless display device based on Wi-Fi Display technology according to a preferred embodiment of the present invention.
  • the network service unit is a networking core unit, and is configured to use one end of the device as The wireless AP accesses, accepts multiple video signals, and the other end is directly connected to the Sink terminal, and sends an "assembled" video signal for multi-channel display to the Sink display.
  • the video accepting unit is configured to accept video streams of multiple video sources in real time and temporarily store them in a buffer area in the storage unit.
  • the video processing unit is set as a built-in image processor, and has an image splicing function. First, multiple video stream images are acquired, and steps of image pre-processing, registration, modeling, etc. are completed, and then fusion reconstruction is performed to splicing multiple images into one.
  • the image signal of the multi-channel picture can be displayed and compression-encoded.
  • the video sending unit is configured to send the multiplexed video data packet to the Sink end.
  • the control unit In addition to the work of scheduling and monitoring the dual network, the control unit also needs to undertake the following tasks: According to the Mac address of each video source device, the Mac stream is sent to the sent video stream to distinguish the source of the video stream, and The unit can also limit the maximum number of video source devices allowed to access by setting the number of ways.
  • the touch screen display unit is configured to provide an operation parameter interface display and a touch device, and the operation parameters thereof at least include: a maximum supported number of channels, a current connection number, a current connected video source device information, a device IP address, a channel bit setting, a wireless network signal, and Battery status, etc. 6 is a flowchart of a main service implementation of a multi-channel wireless display method based on Wi-Fi Display technology according to a preferred embodiment of the present invention, which is based on the Wi-Fi Display technology described in FIG. 4 and FIG.
  • the road wireless display device (hereinafter referred to as the device) is completed. As shown in FIG.
  • Step S601 starting the device (Source), setting operating parameters (eg, number of channels, IP, etc.); Step S602, the device (Source) establishes a connection with the mobile phone terminal and the wireless display (Sink) through its internal network service unit; Step S603, the control unit adds a unique identifier according to the Mac address of the mobile phone terminal, and the software can add a flag bit.
  • the method is implemented; step S604, the touch screen display unit sets the Channel bit, and the currently connected mobile phone terminal is mounted to each
  • the Channel bits form a matching pair, which can realize the function of manually assigning channels.
  • the software can bind the Mac address flag to the Channel bit one-to-one and store it in the hash table.
  • Step S605 the video receiving unit accepts the three channels in real time. The video stream is stored in the buffer area; in step S606, the control unit first determines the matching pair. If a certain channel bit does not mount the flag bit, the channel bit will display a default image.
  • the control unit sends a message notification video.
  • the processing unit performs video processing according to the currently set matching pair.
  • step S608 after the video processing unit obtains three video streams, the video is sequentially spliced according to the matching in the message to form a three-way displayed video stream, and then the compression encoding generates three paths.
  • Step S609 the video sending unit sends the three-way display video data packet to the Sink terminal for display.
  • Wi-Fi Display is compensated for the application defect of only supporting single-channel video display brought by an interactive mode, thereby achieving the effect of realizing the wireless display function of multi-channel high-definition images.
  • each of the above modules can be implemented by hardware.
  • a processor including the above modules, or each of the above modules is located in one processor.
  • software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments.
  • a storage medium is provided, the software being stored, including but not limited to: an optical disk, a floppy disk, a hard disk, a rewritable memory, and the like.
  • the present invention achieves the following technical effects: performing video processing operations such as image stitching on multiple video streams according to a correspondence relationship between a preset video source and a corresponding channel bit, and processing the video
  • the obtained video data packet is sent to the wireless display for multi-channel wireless display, in this way, make up
  • the one-to-one interactive mode of Wi-Fi Display only supports the application defect of single-channel video display, and can realize the wireless display function of multi-channel high-definition images.
  • the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
  • the computing device may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.
  • a multi-channel wireless display method and apparatus provided by an embodiment of the present invention have the following beneficial effects: image stitching of multiple video streams according to a correspondence between a preset video source and a corresponding channel bit
  • the video processing operation by transmitting the video data packet obtained by the video processing to the wireless display for multi-channel wireless display, thereby making up for the application defect of only one-way video display brought by the one-to-one interaction mode of the Wi-Fi Display, It can realize the wireless display function of multi-channel high-definition images.

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  • Signal Processing (AREA)
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Abstract

本发明公开了一种多路无线显示方法及装置。其中，该方法包括：接收来自多个视频源的多路视频流；根据预先设置的匹配对对多路视频流进行视频处理，得到视频数据包，其中，匹配对是视频源与对应于视频源的通道位之间的对应关系，视频处理包括：图像拼接和压缩编码；将视频数据包发送给无线显示器进行多路无线显示。通过本发明，达到了可以实现多路高清影像的无线显示功能的效果。

Description

多路无线显示方法及装置 技术领域 本发明涉及通信领域， 具体而言， 涉及一种多路无线显示方法及装置。 背景技术 无线显示是一种通过无线方式在显示端上显示图像的技术。 图像信息的无线传送 方式就传送内容而言可以分为两种： 一种是传送视频数据包， 其工作方式是： 在视频 发送端， 先将视频流进行压缩， 再以数据包的形式无线发送到接收端， 接收端收到数 据包后进行重组和解压缩， 最后还原图像。 由于压缩与解压需要消耗时间， 所以使用 该方式传送图像时就无可避免地存在一定的时延，目前颇具代表性的技术和标准包括： Wi-Fi Aliance制定的 Wi-Fi Display 苹果公司的 AirPlay Mirroring和英特尔公司的 WiDi。 另一种是直接传送视频流， 该方式不需要对视频流进行压缩和解压缩， 所以不 存在时延， 但是在传送过程中消耗数据带宽非常高， 目前比较有代表性的是 WHDI技 术。 当前， 在众多传送方式中， 最被看好的是 Wi-Fi Display。 Wi-Fi Display由于具有 低时延和迂回性的优势已经被很多厂商认可，将来大部分智能手机都有可能标配 Wi-Fi Display。
Wi-Fi Display是一种图像发送端设备（Source)到接收端设备（Sink)的无线传输 标准， 通过该标准直连的一对设备， 会形成 "One Source - One Sink"的互动关系， 工 作时， Source端无需连接线， 便可将高清影像同步到 Sink端显示。 该技术前景可观， 应用广泛。 例如， （1 ) 使用者可以将手机正在播放的高清电影 "投影"到电视或者高 清显示屏上， 以达到家庭影院的高清影像显示效果； （2) 在会议室中， 通过笔记本电 脑和无线显示器的 Wi-Fi Display互联， 可以将笔记本中的会议内容同步到无线显示器 上显示， 实现投影功能。在终端产品领域中， 支持 Wi-Fi Display的发送端设备（例如， 三星的 GT-I9300和 OPPO的 Find 5 )和接收端设备（例如， 小米盒子和 WiPlug)也层 出不穷。 但是， 这些设备在进行一对一互动时， 仅仅可以支持一路图像传送与显示， 无法实现一个接收端设备多路显示多个发送端设备发来的图像。例如，在一次会议中， 需要投影显示并对比两款手机的同一模块的用户界面显示以及使用操作流程， 或者某 款手机同一功能的不同方案实现。 如果采用一对一的 Wi-Fi Display互动方式， 势必需 要两对发送接收端设备， 才能达到对比效果， 这种方式需要过多消耗硬件资源。 如果 仅使用一部接收端设备， 在一发一收的硬性连接条件下， 通过轮流切换视频源的方式 分别显示两款手机的画面或者某款手机同一功能的一种方案实现， 虽然无需添加更多 接受端设备， 且可以满足会议投影显示的需要， 但是其切换过程会打乱会议节奏， 同 时无法满足人们对比的需求。 针对相关技术中 Wi-Fi Display—对一互动模式仅支持单路显示产生应用不足的问 题， 目前尚未提出有效的解决方案。 发明内容 本发明实施例提供了一种多路无线显示方法及装置， 以至少解决上述问题。 根据本发明的一个方面， 提供了一种多路无线显示方法， 包括： 接收来自多个视 频源的多路视频流； 根据预先设置的匹配对对多路视频流进行视频处理， 得到视频数 据包， 其中， 匹配对是视频源与对应于视频源的通道位之间的对应关系， 视频处理包 括： 图像拼接和压缩编码； 将视频数据包发送给无线显示器进行多路无线显示。 优选地， 在接收来自多个视频源的多路视频流之前， 包括： 根据每个视频源的 MAC地址为每个视频源分配一个唯一标识。 优选地， 在根据每个视频源的 MAC地址为每个视频源分配一个唯一标识之后， 还包括： 为对应于每个视频源的通道设置通道位； 将每个视频源的唯一标识与相应的 通道位进行绑定形成匹配对， 并将匹配对存储到哈希表中。 优选地， 根据预先设置的匹配对对多路视频流进行视频处理， 包括： 根据匹配对 判断是否存在没有挂载唯一标识的通道位， 如果存在， 将预置的默认图像作为该通道 位的显示图像， 如果不存在， 根据匹配对按照接收多路视频流的顺序对多路视频流进 行图像拼接； 对图像拼接得到的可显示多画面的图像信号进行压缩解码。 优选地， 图像拼接包括： 图像预处理、 配准、 建模以及融合重构。 根据本发明的另一方面， 提供了一种多路无线显示装置， 包括： 接收模块， 设置 为接收来自多个视频源的多路视频流； 处理模块， 设置为根据预先设置的匹配对对多 路视频流进行视频处理， 得到视频数据包， 其中， 匹配对是视频源与对应于视频源的 通道位之间的对应关系， 视频处理包括： 图像拼接和压缩编码； 发送模块， 设置为将 视频数据包发送给无线显示器进行多路无线显示。 优选地， 该装置还包括： 分配模块， 设置为根据每个视频源的 MAC地址为每个 视频源分配一个唯一标识。 优选地， 该装置还包括： 设置模块， 设置为为对应于每个视频源的通道设置通道 位； 绑定存储模块， 设置为将每个视频源的唯一标识与相应的通道位进行绑定形成匹 配对， 并将匹配对存储到哈希表中。 优选地， 处理模块包括： 判断单元， 设置为根据匹配对判断是否存在没有挂载唯 一标识的通道位； 处理单元， 设置为在判断结果为是的情况下， 将预置的默认图像作 为该通道位的显示图像， 在判断结果为否的情况下， 根据匹配对按照接收多路视频流 的顺序对多路视频流进行图像拼接， 并对图像拼接得到的可显示多画面的图像信号进 行压缩解码。 优选地， 图像拼接包括： 图像预处理、 配准、 建模以及融合重构。 通过本发明， 采用根据预先设置的视频源与相应通道位之间的对应关系对多路视 频流进行图像拼接等视频处理操作， 将视频处理后得到的视频数据包发送给无线显示 器进行多路无线显示的方式， 解决了相关技术中 Wi-Fi Display一对一互动模式仅支持 单路显示产生应用不足的问题，达到了可以实现多路高清影像的无线显示功能的效果。 附图说明 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是根据本发明实施例的多路无线显示方法流程图； 图 2是根据本发明实施例的多路无线显示装置的结构框图； 图 3是根据本发明实施例的优选多路无线显示装置的结构框图； 图 4是根据本发明优选实施例的基于 Wi-Fi Display技术的多路无线显示装置的组 网示意图； 图 5是根据本发明优选实施例的基于 Wi-Fi Display技术的多路无线显示装置的内 部结构示意图； 图 6是根据本发明优选实施例的基于 Wi-Fi Display技术的多路无线显示方法的主 业务实现流程图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是， 在不冲突的 情况下， 本申请中的实施例及实施例中的特征可以相互组合。 本发明实施例主要涉及一种适用于无线显示领域中的基于 Wi-Fi Display技术的多 路无线显示的实现方法及装置， 当然， 在实际应用中并不局限于此， 完全也可以适用 于其他显示领域或者无线显示领域中基于其他无线显示技术的视频显示。 通过本发明 实施例提供的多路无线显示方法及装置， 可以实现多路高清影像的无线显示功能。 本发明实施例提供了一种多路无线显示方法。 图 1是根据本发明实施例的多路无 线显示方法流程图， 如图 1所示， 该方法主要包括以下步骤 （步骤 S102-步骤 S106): 步骤 S102， 接收来自多个视频源的多路视频流； 步骤 S104,根据预先设置的匹配对对多路视频流进行视频处理，得到视频数据包， 其中， 匹配对是视频源与对应于视频源的通道位之间的对应关系， 视频处理包括： 图 像拼接和压缩编码； 步骤 S106, 将视频数据包发送给无线显示器进行多路无线显示。 通过上述各个步骤， 可以根据预先设置的视频源与相应通道位之间的对应关系对 多路视频流进行图像拼接等视频处理操作， 将视频处理后得到的视频数据包发送给无 线显示器进行多路无线显示，通过这种方式，可以实现多路高清影像的无线显示功能。 在本实施例中， 在执行步骤 S102之前， 可以根据每个视频源的 MAC地址为每个 视频源分配一个唯一标识， 进一步地， 可以为对应于每个视频源的通道设置通道位， 再将每个视频源的唯一标识与相应的通道位进行绑定形成匹配对， 并将匹配对存储到 哈希表中。 以这种方式， 可以方便后续使用匹配对。 在本实施例中，步骤 S104可以通过以下方式来实现：先根据匹配对判断是否存在 没有挂载唯一标识的通道位， 如果存在， 可以将预置的默认图像作为该通道位的显示 图像， 如果不存在， 可以根据匹配对按照接收多路视频流的顺序对多路视频流进行图 像拼接， 进一步地， 可以对图像拼接得到的可显示多画面的图像信号进行压缩解码。 通过这种方式， 就可以得到适用于无线显示器 （显示端） 直接进行适配显示的视频数 据包。 在本实施例中， 图像拼接可以包括： 图像预处理、 配准、 建模以及融合重构。 当 然， 在实际应用中并不绝限于此， 如果对需要进行无线显示的视频有特定需要， 还可 以在图像拼接过程中增加其他的视频处理操作。 本发明实施例提供了一种多路无线显示装置， 用以实现上述实施例提供的多路无 线显示方法。 图 2是根据本发明实施例的多路无线显示装置的结构框图，如图 2所示， 该装置主要包括： 接收模块 10、 处理模块 20以及发送模块 30。 其中， 接收模块 10， 设置为接收来自多个视频源的多路视频流； 处理模块 20， 设置为根据预先设置的匹配 对对多路视频流进行视频处理， 得到视频数据包， 其中， 匹配对是视频源与对应于视 频源的通道位之间的对应关系， 视频处理包括： 图像拼接和压缩编码； 发送模块 30， 设置为将视频数据包发送给无线显示器进行多路无线显示。 图 3是根据本发明实施例的优选多路无线显示装置的结构框图， 如图 3所示， 该 优选多路无线显示装置还可以包括： 分配模块 40， 设置为根据每个视频源的 MAC地 址为每个视频源分配一个唯一标识。 进一步地， 该装置还可以包括： 设置模块 50， 设 置为为对应于每个视频源的通道设置通道位； 绑定存储模块 60， 设置为将每个视频源 的唯一标识与相应的通道位进行绑定形成匹配对， 并将匹配对存储到哈希表中。 在该优选多路无线显示装置中， 处理模块 20包括： 判断单元 22， 设置为根据匹 配对判断是否存在没有挂载唯一标识的通道位； 处理单元 24， 设置为在判断结果为是 的情况下， 将预置的默认图像作为该通道位的显示图像， 在判断结果为否的情况下， 根据匹配对按照接收多路视频流的顺序对多路视频流进行图像拼接， 并对图像拼接得 到的可显示多画面的图像信号进行压缩解码。 需要说明的是， 在图 2和图 3所示的实施例中， 图像拼接具体可以包括： 图像预 处理、 配准、 建模以及融合重构。 当然， 在实际应用中并不绝限于此， 如果对需要进 行无线显示的视频有特定需要， 还可以在图像拼接过程中增加其他的视频处理操作。 采用上述实施例提供的多路无线显示方法及装置， 解决了相关技术中 Wi-Fi Display一对一互动模式仅支持单路显示产生应用不足的问题，可以实现多路高清影像 的无线显示功能。 下面结合图 3至图 6以及优选实施例对上述实施例提供的多路无线显示方法及装 置作进一步的详细描述和说明。本优选实施例主要提供了一种基于 Wi-Fi Display技术 的多路无线显示方法及装置， 在本优选实施例中， 以下将手机终端作为视频源， 以此 为例进行说明。 首先， 为了更好地理解本优选实施例的技术方案， 以下对 Wi-Fi Display技术进行 以下简要介绍： 根据背景技术部分的内容可知， Wi-Fi Display—对一互动模式实际上 就是一种一发一收的无线传送方式。 其工作流程简要概述为以下几个步骤：
( 1 ) 在 Source端与 Sink端之间建立 WiFi直连或者 TDLS (Tunneled Direct Link Setup, 通道直接链路建立） 连接；
(2)连接成功后， 由 Source端捕获 Screen信息， 并对 Screen信息进行 H.264编 码， 压缩；
(3 ) 然后由 Source端通过 WiFi或者 TDLS将压缩数据包发送给 Sink端；
(4) Sink端接收到数据包后， 通过解压、 H.264解码等步骤， 还原 Screen信息； ( 5 ) 最后由 Sink端将 Screen信息投影到 Sink端对应的显示屏上。
Source端与 Sink端互动过程具有以下特点： （1 ) 图像信息只是单纯地从 Source 端传送给 Sink端， 中间仅仅经过编解码处理， 图像并未发生内容或者画质上的变化， 因此， 通过这种方式显示在 Sink端的图像完全依赖于 Source端。 （2) 从 Source端到 Sink端仅仅传送单路图像， 在现有的一发一收传输环境下， 无法实现多路显示效果。 (3 )现有的 Wi-Fi Display技术还不支持一个 Sink与多个 Source同时互联并同步多路 Source的画面。 因此， 在现有技术条件的限制下， 须以 Source端为解决问题的出发点， 增设一种 可以实现多路无线显示的装置 （即， 本优选实施例提供的基于 Wi-Fi Display技术的多 路无线显示装置）才可以弥补 Wi-Fi Display仅支持单路显示的应用不足， 这是提出本 优选实施例的技术方案的主要思路。 通过本优选实施例， 一方面， 基于 Wi-Fi Display 技术的多路无线显示装置可以接受多个视频源的图像信息， 并进行消息控制、 视频处 理与运行参数显示等活动； 另一方面， 基于 Wi-Fi Display技术的多路无线显示装置可 以充当 Source与 Sink端一对一互动， 其中， 多路视频源将不再作为 Source, 而是通 过本发明实施例提供的基于 Wi-Fi Display技术的多路无线显示装置间接与 Sink互动。 本优选实施例提供的基于 Wi-Fi Display技术的多路无线显示装置主要包括： 视频 接受单元、 控制单元、 视频处理单元、 视频发送单元、 存储单元与网络服务单元。 在本优选实施例中， 组网方式是通过其内部的网络服务单元搭建双网络环境的。 网络服务单元作为视频数据传输的通道， 其内部包含一块双网卡， 双网卡的一端作为 无线 AP (Access Point, 接入点） 存在， 将基于 Wi-Fi Display技术的多路无线显示装 置 （以下简称为该装置） 与各个视频源 （例如， 手机终端或者 Tablet (平板电脑）） 组 建到一个小型的无线局域网中， 形成一对多的拓扑结构（组网结构可以参照图 4， 图 4 是根据本发明优选实施例的基于 Wi-Fi Display 技术的多路无线显示装置的组网示意 图）， 通过 WHDI等标准接受各个视频源发来的视频流。 其连接过程大致包含以下步 骤： （1 ) 登录 IE管理界面， 设置无线 AP的 IP地址为静态以及密钥； （2) 手动为视 频源设备分配静态 IP， 启用无线连接功能， 搜索 AP设备； （3 ) 输入密钥， 发送连接 请求， AP完成校验后，允许接入。双网卡的另一端则用于该装置与 Sink端之间的 Wi-Fi Display互联， 将处理完毕的视频数据包发送给 Sink端用于投影显示。 该装置中设置 的控制单元可以完成双网络的调度与监控等工作， 主要包括分配适配于该装置两端的 接入模式（一端是无线 AP， 形成一对多型的无线局域网， 另一端是 Wi-Fi Display, 形 成点对点直连）， 管理网络中视频数据的流向， 监控网络中终端的连接状态， 通过消息 控制其它辅助单元的工作。 以下对本优选实施例提供的基于 Wi-Fi Display技术的多路无线显示装置进行进一 步的描述。 图 5是根据本发明优选实施例的基于 Wi-Fi Display技术的多路无线显示装置的内 部结构示意图， 如图 5所示， 网络服务单元是组网核心单元， 设置为将本装置的一端 作为无线 AP接入， 接受多条视频信号， 另一端则与 Sink端直连， 将 "组装好 " 的一 条用于多路显示的视频信号发送给 Sink显示。视频接受单元， 设置为实时接受多个视 频源的视频流并临时存入到存储单元中的缓存区。 视频处理单元， 设置为内置图像处 理器， 具有图像拼接功能， 首先获取多个视频流画面， 完成图像的预处理、 配准、 建 模等步骤， 然后融合重构， 将多个画面拼接成一个可显示多路画面的图像信号， 并进 行压缩编码。 视频发送单元， 设置为将多路显示的视频数据包发送给 Sink端。 控制单 元除了完成双网络的调度与监控等工作之外， 还需承担如下工作： 根据各个视频源设 备的 Mac地址， 为发送来的视频流打上 Mac标签， 以区别视频流的来源， 同时， 该单 元还可以通过设置路数来限制允许接入的视频源设备的最大数目等。 触屏显示单元， 设置为提供运行参数界面显示以及触摸装置， 其运行参数至少包括： 最大支持路数、 当前连接数目、 当前连接视频源设备信息、 装置 IP地址、 Channel位设置、 无线网络 信号和电量状态等。 图 6是根据本发明优选实施例的基于 Wi-Fi Display技术的多路无线显示方法的主 业务实现流程图， 该流程是以图 4和图 5中所述的基于 Wi-Fi Display技术的多路无线 显示装置 （以下简称为该装置） 为基础完成的， 如图 6所示， 该流程包括： 步骤 S601 , 启动该装置 （Source), 设置运行参数 （例如， 路数、 IP等）； 步骤 S602， 该装置 （Source) 通过其内部网络服务单元建立与手机终端和无线显 示器 （Sink) 的连接； 步骤 S603 ,控制单元根据手机终端的 Mac地址打上唯一标识，软件上可以通过增 设一个标志位的方式实现； 步骤 S604, 触屏显示单元设置 Channel 位， 将当前连接的手机终端挂载到各个
Channel位形成匹配对， 可以实现手动分配频道的功能， 软件上可以将 Mac地址标志 位与 Channel位进行一对一绑定， 再存入哈希表中； 步骤 S605, 视频接受单元实时接受三路视频流， 并存入缓存区； 步骤 S606, 控制单元首先进行匹配对的判断， 如果某一 Channel位没有挂载标志 位， 则该 Channel位将显示默认图像； 步骤 S607,控制单元发送消息通知视频处理单元按照当前设置的匹配对进行视频 处理； 步骤 S608, 视频处理单元得到三路视频流后， 根据消息中的匹配对信息按照次序 拼接视频形成三路显示的视频流， 然后压缩编码产生三路显示视频数据包； 步骤 S609, 视频发送单元发送三路显示视频数据包给 Sink端以进行显示。 通过上述优选实施例， 弥补了 Wi-Fi Display—对一互动模式带来的仅支持单路视 频显示的应用缺陷， 进而达到了可以实现多路高清影像的无线显示功能的效果。 需要说明的是， 上述各个模块是可以通过硬件来实现的。 例如： 一种处理器， 包 括上述各个模块， 或者， 上述各个模块分别位于一个处理器中。 在另外一个实施例中， 还提供了一种软件， 该软件用于执行上述实施例及优选实 施方式中描述的技术方案。 在另外一个实施例中， 还提供了一种存储介质， 该存储介质中存储有上述软件， 该存储介质包括但不限于： 光盘、 软盘、 硬盘、 可擦写存储器等。 从以上的描述中， 可以看出， 本发明实现了如下技术效果： 根据预先设置的视频 源与相应通道位之间的对应关系对多路视频流进行图像拼接等视频处理操作， 将视频 处理后得到的视频数据包发送给无线显示器进行多路无线显示， 通过这种方式， 弥补 了 Wi-Fi Display一对一互动模式带来的仅支持单路视频显示的应用缺陷， 可以实现多 路高清影像的无线显示功能。 显然， 本领域的技术人员应该明白， 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现， 它们可以集中在单个的计算装置上， 或者分布在多个计算装置所 组成的网络上， 可选地， 它们可以用计算装置可执行的程序代码来实现， 从而， 可以 将它们存储在存储装置中由计算装置来执行， 并且在某些情况下， 可以以不同于此处 的顺序执行所示出或描述的步骤， 或者将它们分别制作成各个集成电路模块， 或者将 它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样， 本发明不限制于任 何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已， 并不用于限制本发明， 对于本领域的技 术人员来说， 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内， 所作的 任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。 工业实用性 如上所述，本发明实施例提供的一种多路无线显示方法及装置具有以下有益效果： 根据预先设置的视频源与相应通道位之间的对应关系对多路视频流进行图像拼接等视 频处理操作， 通过将视频处理后得到的视频数据包发送给无线显示器进行多路无线显 示，从而弥补了 Wi-Fi Display一对一互动模式带来的仅支持单路视频显示的应用缺陷， 可以实现多路高清影像的无线显示功能。

Claims

权 利 要 求 书
1. 一种多路无线显示方法， 包括： 接收来自多个视频源的多路视频流；
根据预先设置的匹配对对所述多路视频流进行视频处理，得到视频数据包， 其中，所述匹配对是所述视频源与对应于所述视频源的通道位之间的对应关系， 所述视频处理包括： 图像拼接和压缩编码；
将所述视频数据包发送给无线显示器进行多路无线显示。
2. 根据权利要求 1所述的方法，其中，在接收来自多个视频源的多路视频流之前， 包括：
根据每个所述视频源的 MAC地址为每个所述视频源分配一个唯一标识。
3. 根据权利要求 2所述的方法， 其中， 在根据每个所述视频源的 MAC地址为每 个所述视频源分配一个唯一标识之后， 还包括：
为对应于每个所述视频源的通道设置所述通道位； 将每个所述视频源的唯一标识与相应的所述通道位进行绑定形成所述匹配 对， 并将所述匹配对存储到哈希表中。
4. 根据权利要求 3所述的方法， 其中， 根据预先设置的匹配对对所述多路视频流 进行视频处理， 包括：
根据所述匹配对判断是否存在没有挂载所述唯一标识的通道位，如果存在， 将预置的默认图像作为该通道位的显示图像， 如果不存在， 根据所述匹配对按 照接收所述多路视频流的顺序对所述多路视频流进行图像拼接； 对图像拼接得到的可显示多画面的图像信号进行压缩解码。
5. 根据权利要求 1至 4中任一项所述的方法， 其中， 所述图像拼接包括： 图像预 处理、 配准、 建模以及融合重构。
6. 一种多路无线显示装置， 包括： 接收模块， 设置为接收来自多个视频源的多路视频流； 处理模块，设置为根据预先设置的匹配对对所述多路视频流进行视频处理， 得到视频数据包， 其中， 所述匹配对是所述视频源与对应于所述视频源的通道 位之间的对应关系， 所述视频处理包括： 图像拼接和压缩编码；
发送模块，设置为将所述视频数据包发送给无线显示器进行多路无线显示。 根据权利要求 6所述的装置， 其中， 所述装置还包括： 分配模块， 设置为根据每个所述视频源的 MAC地址为每个所述视频源分 配一个唯一标识。 根据权利要求 7所述的装置， 其中， 所述装置还包括： 设置模块， 设置为为对应于每个所述视频源的通道设置所述通道位； 绑定存储模块， 设置为将每个所述视频源的唯一标识与相应的所述通道位 进行绑定形成所述匹配对， 并将所述匹配对存储到哈希表中。 根据权利要求 8所述的装置， 其中， 所述处理模块包括： 判断单元， 设置为根据所述匹配对判断是否存在没有挂载所述唯一标识的 通道位；
处理单元， 设置为在判断结果为是的情况下， 将预置的默认图像作为该通 道位的显示图像， 在判断结果为否的情况下， 根据所述匹配对按照接收所述多 路视频流的顺序对所述多路视频流进行图像拼接， 并对图像拼接得到的可显示 多画面的图像信号进行压缩解码。 根据权利要求 6至 9中任一项所述的装置， 其中， 所述图像拼接包括： 图像预 处理、 配准、 建模以及融合重构。
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