WO2019052463A1 - 基于WiFi Display的多媒体文件共享方法、设备以及系统 - Google Patents

基于WiFi Display的多媒体文件共享方法、设备以及系统 Download PDF

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Publication number
WO2019052463A1
WO2019052463A1 PCT/CN2018/105204 CN2018105204W WO2019052463A1 WO 2019052463 A1 WO2019052463 A1 WO 2019052463A1 CN 2018105204 W CN2018105204 W CN 2018105204W WO 2019052463 A1 WO2019052463 A1 WO 2019052463A1
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Prior art keywords
file
multimedia
video
end device
transmission channel
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PCT/CN2018/105204
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English (en)
French (fr)
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吴诗乐
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惠州Tcl移动通信有限公司
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Publication of WO2019052463A1 publication Critical patent/WO2019052463A1/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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/4104—Peripherals receiving signals from specially adapted client devices
    • H04N21/4126—The peripheral being portable, e.g. PDAs or mobile phones
    • 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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/4104—Peripherals receiving signals from specially adapted client devices
    • H04N21/4113—PC
    • 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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
    • 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
    • H04N21/4341—Demultiplexing of audio and video streams
    • 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]
    • 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
    • H04N21/439—Processing of audio elementary streams
    • H04N21/4398—Processing of audio elementary streams involving reformatting operations of audio signals
    • 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
    • H04N21/4402—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 involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H04N21/440236—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 involving reformatting operations of video signals for household redistribution, storage or real-time display by media transcoding, e.g. video is transformed into a slideshow of still pictures, audio is converted into text

Definitions

  • the present invention relates to the field of mobile terminal technologies, and in particular, to a WiFi-based system. Display multimedia file sharing method, device and system.
  • Mobile terminal via WiFi Display can project the screen display content of the mobile terminal onto the display device to achieve screen sharing. Due to the space limitation of the mobile terminal, the display screen size is small, and the user usually uses WiFi.
  • the Display performs multimedia resource sharing to realize the multimedia resources of the mobile terminal on the display device. However, the current mobile terminal can only realize the synchronous projection of the screen, and directly project the content displayed on the screen of the mobile terminal to the display device. If the user performs other operations (such as a call, etc.), the display device synchronously displays the display screen of the mobile terminal. Unable to continue to view multimedia resources on the display device, which has a negative impact on the user experience.
  • the technical problem mainly solved by the present invention is to provide a WiFi-based solution.
  • Display multimedia file sharing method, device and system do not need to display content through the projection device screen, and share multimedia files, which can improve the user experience.
  • one technical solution adopted by the present invention is to provide a WiFi-based solution.
  • Display multimedia file sharing method the method includes:
  • Another technical solution adopted by the present invention is to provide a WiFi-based solution.
  • Display's multimedia file sharing device which is capable of executing programs to achieve the following actions:
  • another technical solution adopted by the present invention is to provide a WiFi-based solution.
  • Display multimedia file sharing system the system includes a sender device and a receiver device,
  • a data transmission channel is established between the sender device and the receiver device, and the sender device is configured to separately decode the audio file and the video file of the multimedia file to be shared, and then encode the decoded audio file and the video file, and
  • the encoded transmission file is transmitted to the receiving device through the data transmission channel; the receiving device is used to receive the transmission file, and then decode and play the transmission file.
  • the step of establishing a data transmission channel with the receiving device includes: connecting to the receiving device through the WiFi-P2P technology, and establishing an RTSP protocol transmission channel; and transmitting the encoded transmission file to the receiving device through the RTSP protocol transmission channel.
  • the steps of separately decoding the audio file and the video file of the multimedia file to be shared include: respectively inserting the audio file and the video file of the multimedia file to be shared into different multimedia file buffers; respectively, using the audio decoder to share the multimedia
  • the audio file of the file is decoded, and the video file of the multimedia file to be shared by the video decoder is decoded; the decoded audio file is respectively placed in the audio file buffer, and the decoded video file is placed in the video file buffer.
  • the beneficial effects of the present invention are: directly acquiring the screen display content of the mobile terminal for multimedia file sharing compared with the prior art, and the transmitting end device separately decodes, encodes, and passes the audio file and the video file of the multimedia file to be shared.
  • the data transmission channel established between the sending end device and the receiving end device is transmitted to the receiving end device for decoding and playing, and the multimedia file is shared, and the multimedia file sharing can be performed without displaying the content on the screen of the projection device, thereby improving the user experience.
  • FIG. 1 is a schematic flow chart of a first embodiment of a multimedia file sharing method based on WiFi Display according to the present invention
  • FIG. 2 is a schematic structural diagram of a second embodiment of a multimedia file sharing method based on WiFi Display according to the present invention
  • FIG. 3 is a schematic flowchart of a third embodiment of a multimedia file sharing method based on WiFi Display according to the present invention.
  • FIG. 4 is a schematic structural diagram of an embodiment of a transmitting end device according to the present invention.
  • FIG. 5 is a schematic flowchart of a fourth embodiment of a multimedia file sharing method based on WiFi Display according to the present invention.
  • FIG. 6 is a schematic structural diagram of an embodiment of a receiving end device according to the present invention.
  • FIG. 7 is a schematic flowchart of a fifth embodiment of a multimedia file sharing method based on WiFi Display according to the present invention.
  • FIG. 8 is a schematic structural diagram of an embodiment of a multimedia file sharing system based on WiFi Display according to the present invention.
  • FIG. 1 is a schematic flowchart diagram of a first embodiment of a multimedia file sharing method based on WiFi Display according to the present invention.
  • the sending device searches for Wi-Fi in a certain range through Wi-Fi P2P technology.
  • P2P technology devices collect all the receiving device information supporting Wi-Fi P2P technology in a list to select to establish Wi-Fi P2P connections between each other.
  • the transmitting device can select whether to establish a connection with the receiving device that also supports the Wi-Fi P2P technology, for example, for example, there are multiple Wi-Fi supporting devices around the transmitting device.
  • the receiving device of the P2P technology needs to select a receiving device for file sharing.
  • the transmitting device selects the receiving device, it passes Wi-Fi.
  • the P2P technology establishes a connection. After the connection is established according to the technical specifications, the relationship ownership and the accessory end need to be established.
  • the sender device becomes the relationship owner
  • the receiver device becomes the slave device
  • the sender device sends the to-be-shared device to the receiver device. File and play on the receiving device.
  • S104 device negotiation parameters
  • the parameter information needs to be exchanged, for example, the audio and video formats supported by the sending end device and the receiving end device, and the parameter information is unified. If the normal file transfer is performed, the file transfer will fail because the transfer file does not match the file format supported by the two.
  • the sending end device passes the file to be shared to the receiving end device through the MPEG2 TS encoding and then transmits the file to the receiving end device through the RTSP protocol.
  • the receiving device will decode the received file to be shared and play it on the receiving device.
  • the transmitting end device and the receiving end device may adjust the transmission file according to the transmission state, such as the strength of the connection signal and the power status of the device, and adjust the content.
  • the transmission state such as the strength of the connection signal and the power status of the device.
  • the transmitting device may stop the entire file sharing process and select to disconnect from the receiving device to enable other file sharing operations.
  • FIG. 2 is a schematic structural diagram of a second embodiment of a multimedia file sharing method based on WiFi Display according to the present invention.
  • the sender device supports Wi-Fi P2P technology through Wi-Fi.
  • the P2P technology scans to obtain a range of receiving devices that support Wi-Fi P2P technology, and initiates a connection request to a receiving device that scans to support Wi-Fi P2P technology to establish Wi-Fi.
  • P2P connection then establish an RTSP channel according to the address and port connected between the sending end device and the receiving end device, for data transmission between the two, the data transmission between the transmitting end device and the receiving end device is performed by a Session (session object) management.
  • Session session object
  • the sending device establishes Wi-Fi with the receiving device.
  • P2P connection the file to be shared sent by the sending end device to the receiving end device is from SurFaceFlinger (the screen display content), that is, the display content of the screen of the sending end device, and the display content of the screen of the transmitting end device is obtained through the BufferQueue (buffer queue), after passing through MPEG2TS Encoding, the encoded file is transmitted through the RTSP channel, and the receiving device receives the encoded file and performs decoding and playing.
  • SurFaceFlinger the screen display content
  • BufferQueue buffer queue
  • the sender device passes Wi-Fi
  • the P2P technology establishes a connection with the receiving device and constitutes an RTSP channel, and transmits the display content of the screen of the transmitting device to the receiving device through the RTSP channel for shared playback.
  • the receiving device will synchronize the screen of the sending device and leave the playing interface of the shared file, which has an adverse effect on the user experience.
  • FIG. 3 is a WiFi based method of the present invention.
  • S301 Establish a data transmission channel with the receiving end device.
  • the sending end device establishes a connection relationship with the receiving end device to establish a data transmission channel, and is used for data transmission between the transmitting end device and the receiving end device.
  • the sending device can be found by the Wi-Fi P2P technology and is centered on the sending device, and supports Wi-Fi within a certain radius.
  • a device of P2P technology and establishes a Wi-Fi P2P connection with the found device, and an RTSP protocol transmission channel for data transmission.
  • Miracast is a Wi-Fi Alliance (Wi-Fi Alliance) that supports Wi-Fi The authentication name of the device for the Display function. Miracast-certified devices will remain on Wi-Fi to the fullest extent possible Display features are supported and compatible. It can be seen that Miracast is investigating Wi-Fi Display. And Wi-Fi The core function of Display is to let video and audio data be shared between devices via Wi-Fi wireless network.
  • Wi-Fi Alliance Wi-Fi Alliance
  • Wi-Fi P2P technology is one of the technology items that Miracast certified devices rely on, Wi-Fi P2P technology supports two Wi-Fi devices to establish connection and communication without Access Point; Wi-Fi Protected Setup is used to help users automatically configure Wi-Fi networks, add Wi-Fi devices, etc.; 11n/WMM/WPA2: Among them, 11n is the 802.11n protocol, which will increase the Wi-Fi transmission rate provided by 11a and 11g from 56Mbps to 300. Even 600Mbps. WMM is Wi-Fi The abbreviation of Multimedia is a QoS service for real-time video and audio data. And WPA2 means Wi-Fi Protected The second edition of Acess is mainly used to encrypt and protect the transmitted data.
  • the RTSP real-time streaming protocol defines how a one-to-many application can efficiently transmit multimedia data over an IP network, a multimedia streaming protocol for controlling sound or video, and allows multiple simultaneous stream demand control, the network used for transmission.
  • the communication protocol is not within the scope of its definition, and the server can choose to use TCP or UDP to transmit the streaming content.
  • S302 Decode the audio file and the video file of the multimedia file to be shared separately;
  • the existing audio and video decoding framework in the Android source code is used to read the shared multimedia file, and the audio file and the video file of the multimedia file to be shared are respectively placed.
  • the audio file and the video file of the multimedia file to be shared are respectively placed.
  • Into different multimedia file buffers respectively use audio decoder to decode audio files and use video decoder to decode video files, and then respectively put the decoded audio files and video files into corresponding audio file buffers and Video file buffer.
  • the audio file and the video file need to be decoded separately by the decoding method described in the above embodiments, and in the audio file and the video file encoding and decoding process, respectively, in the audio file.
  • the matching mark is added to ensure that the video file of each frame is exactly matched with the corresponding audio file, that is, the sound is synchronized with the image picture.
  • the decoded audio file and the video file are read from the audio file buffer and the video file buffer, and the MPEG2-TS communication protocol is encoded to form a transmission file, and the encoded transmission file is passed.
  • the RTSP data transmission channel is transmitted to the receiving device to decode and play the multimedia file to be shared on the receiving device.
  • MPEG2-TS is a communication protocol for audio effects, images and data.
  • the audio files and video files of the multimedia files to be shared are encoded by the MPEG2-TS communication protocol, so that the audio files and video files of the multimedia files to be shared have a stream.
  • the characteristics of the media file can be independently coded from any part of the audio file and the video file, that is, the audio file and the video file can be played from any point in time, and the audio file and the video file can be played without being completely downloaded. It is possible to play audio files as well as video files while downloading.
  • FIG. 4 is a schematic structural diagram of an embodiment of a transmitting end device according to the present invention.
  • the transmitting device can execute a program to implement the following actions:
  • the sending end device establishes a connection relationship with the receiving end device to establish a data transmission channel, and is used for data transmission between the transmitting end device and the receiving end device.
  • the sending device can be found by the Wi-Fi P2P technology and is centered on the sending device, and supports Wi-Fi within a certain radius.
  • a device of P2P technology and establishes a Wi-Fi P2P connection with the found device, and an RTSP protocol transmission channel for data transmission.
  • the existing audio and video decoding framework in the Android source code is used to read the shared multimedia file, and the audio file and the video file of the multimedia file to be shared are respectively placed.
  • the audio file and the video file of the multimedia file to be shared are respectively placed.
  • Into different multimedia file buffers respectively use audio decoder to decode audio files and use video decoder to decode video files, and then respectively put the decoded audio files and video files into corresponding audio file buffers and Video file buffer.
  • Encoding the decoded audio file and the video file and transmitting the encoded transmission file to the receiving device through the data transmission channel;
  • the transmitting device reads the decoded audio file and the video file from the audio file buffer and the video file buffer, and performs encoding of the MPEG2-TS communication protocol to form a transmission file, and the encoded file is encoded.
  • the transmission file is transmitted to the receiving device through the RTSP data transmission channel, so that the multimedia file to be shared is decoded and played on the receiving device.
  • FIG. 5 is a WiFi based method of the present invention.
  • the WiFi file-based multimedia file sharing method is described in this embodiment, including but not limited to the following steps.
  • S501 Establish a data transmission channel with the sending device.
  • the receiving end device establishes a connection relationship with the transmitting end device to establish a data transmission channel, and is used for data transmission between the receiving end device and the transmitting end device.
  • the receiving device can establish Wi-Fi with the sending device through Wi-Fi P2P technology.
  • P2P connection and RTSP protocol transmission channel for data transmission.
  • the receiving end device receives the encoded transmission file transmitted by the transmitting end device through the RTSP protocol transmission channel, and encodes the decoded audio file and the video file on the transmitting end device, so that the audio file and the video file are provided.
  • Streaming media file features, while encrypting audio files and video files to avoid malicious tampering during transmission, to ensure the security of audio files and video files during transmission.
  • the transmission file received by the receiving end device from the transmitting end device is encoded by the MPEG2-TS communication protocol, and the receiving end device also performs MPEG2-TS communication protocol decoding on the transmission file, and displays it, thereby implementing the transmitting end.
  • the device shares the multimedia file with the receiving device.
  • FIG. 6 is a schematic structural diagram of an embodiment of a receiving end device according to the present invention.
  • the receiving device can execute a program to implement the following actions:
  • the receiving end device establishes a connection relationship with the transmitting end device to establish a data transmission channel, and is used for data transmission between the receiving end device and the transmitting end device.
  • the receiving device can establish Wi-Fi with the sending device through Wi-Fi P2P technology.
  • P2P connection and RTSP protocol transmission channel for data transmission.
  • the receiving end device receives the encoded transmission file transmitted by the transmitting end device through the RTSP protocol transmission channel, and encodes the decoded audio file and the video file on the transmitting end device, so that the audio file and the video file are provided.
  • Streaming media file features, while encrypting audio files and video files to avoid malicious tampering during transmission, to ensure the security of audio files and video files during transmission.
  • the transmission file received by the receiving end device from the transmitting end device is encoded by the MPEG2-TS communication protocol, and the receiving end device also performs MPEG2-TS communication protocol decoding on the transmission file, and displays it, thereby implementing the transmitting end.
  • the device shares the multimedia file with the receiving device.
  • FIG. 7 is a schematic flowchart diagram of a fifth embodiment of a multimedia file sharing method based on WiFi Display according to the present invention.
  • the sending end device establishes a data transmission channel with the receiving end device
  • the sending end device establishes a connection relationship with the receiving end device to establish a data transmission channel, and is used for data transmission between the transmitting end device and the receiving end device.
  • the sending device can be found by the Wi-Fi P2P technology and is centered on the sending device, and supports Wi-Fi within a certain radius.
  • a device of P2P technology and establishes a Wi-Fi P2P connection with the found device, and an RTSP protocol transmission channel for data transmission.
  • the method further includes the step of checking the multimedia parameters between the sending end device and the receiving end device, so as to unify the multimedia parameters of the sending end device and the receiving end device, For example, the audio and video formats supported by the sender device and the receiver device.
  • S702 The sending end device separately decodes the audio file and the video file of the multimedia file to be shared;
  • the existing audio and video decoding framework in the Android source code is used to read the shared multimedia file, and the audio file and the video file of the multimedia file to be shared are respectively placed.
  • the audio file and the video file of the multimedia file to be shared are respectively placed.
  • Into different multimedia file buffers respectively use audio decoder to decode audio files and use video decoder to decode video files, and then respectively put the decoded audio files and video files into corresponding audio file buffers and Video file buffer.
  • S703 the sending end device encodes the decoded audio file and the video file, and transmits the encoded transmission file to the receiving end device through the data transmission channel;
  • the decoded audio file and the video file are read from the audio file buffer and the video file buffer, and the MPEG2-TS communication protocol is encoded to form a transmission file, and the encoded transmission file is passed.
  • the RTSP data transmission channel is transmitted to the receiving device to decode and play the multimedia file to be shared on the receiving device.
  • S704 The receiving end device receives the transmission file.
  • the receiving end device receives the encoded transmission file transmitted by the transmitting end device through the RTSP protocol transmission channel, and encodes the decoded audio file and the video file on the transmitting end device, so that the audio file and the video file are provided.
  • Streaming media file features, while encrypting audio files and video files to avoid malicious tampering during transmission, to ensure the security of audio files and video files during transmission.
  • S705 The receiving end device decodes and plays the transmission file.
  • the transmission file received by the receiving end device from the transmitting end device is encoded by the MPEG2-TS communication protocol, and the receiving end device also performs MPEG2-TS communication protocol decoding on the transmission file, and displays it, thereby implementing the transmitting end.
  • the device shares the multimedia file with the receiving device.
  • FIG. 8 is a schematic structural diagram of an embodiment of a multimedia file sharing system based on WiFi Display according to the present invention.
  • the multimedia file sharing system 800 includes a transmitting end device 801 and a receiving end device 802; a data transmission channel is established between the transmitting end device 801 and the receiving end device 802, and the transmitting end device 801 sets the multimedia file to be shared.
  • the audio file and the video file are respectively decoded, and then the decoded audio file and the video file are encoded, and the encoded transmission file is transmitted to the receiving device 802 through the data transmission channel; the receiving device 802 receives the transmission file, and then decodes and Play the transfer file.
  • the multimedia file sharing system 800 as described in this embodiment can implement the WiFi based on the above embodiments.
  • the multimedia file sharing method of Display will not be described here.
  • the present invention encodes and decodes the audio file and the video file of the file to be shared in the transmitting device, encodes it by the MPEG2-TS communication protocol, and transmits it to the receiving device through the RTSP protocol transmission channel, and performs decoding and decoding instead.
  • the display content of the screen of the sending device is directly displayed on the receiving device, and the multimedia file sharing can be realized without the transmitting device maintaining the multimedia file interface, and the transmitting device can perform operations other than playing the multimedia file to be shared. It does not affect the receiving device to play multimedia files, improving the user experience.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

本发明公开了一种基于WiFi Display的多媒体文件共享方法、设备以及系统。该方法包括：发送端设备与接收端设备建立数据传输通道；发送端设备将待共享的多媒体文件的音频文件以及视频文件分别解码；发送端设备将解码后的音频文件以及视频文件进行编码，并将编码后的传输文件通过数据传输通道传输至接收端设备；接收端设备接收传输文件；接收端设备解码并播放传输文件。通过上述方式，本发明不需要通过投射设备屏幕显示内容，进行多媒体文件共享，改善使用者的使用体验。

Description

基于WiFi Display的多媒体文件共享方法、设备以及系统
【技术领域】
本发明涉及移动终端技术领域，特别是涉及一种基于WiFi Display的多媒体文件共享方法、设备以及系统。
【背景技术】
移动终端通过WiFi Display可以将移动终端的屏幕显示内容投射到显示设备上，实现屏幕共享。移动终端由于其空间限制，显示屏幕尺寸较小，使用者通常利用WiFi Display进行多媒体资源的共享，实现在显示设备上欣赏移动终端的多媒体资源。但是，目前的移动终端只能实现屏幕的同步投射，将移动终端屏幕显示的内容直接投射到显示设备，若使用者执行其他操作（例如通话等），显示设备会同步显示移动终端的显示屏幕，无法继续在显示设备上观看多媒体资源，对使用者的使用体验造成不良影响。
【发明内容】
有鉴于此，本发明主要解决的技术问题是提供一种基于WiFi Display的多媒体文件共享方法、设备以及系统，不需要通过投射设备屏幕显示内容，进行多媒体文件共享，能够改善使用者的使用体验。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种基于WiFi Display的多媒体文件共享方法，该方法包括：
与接收端设备建立数据传输通道；将待共享的多媒体文件的音频文件以及视频文件分别解码；将解码后的音频文件以及视频文件进行编码，并将编码后的传输文件通过数据传输通道传输至接收端设备。
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种基于WiFi Display的多媒体文件共享设备，该设备能够执行程序以实现如下动作：
与接收端设备建立数据传输通道；将待共享的多媒体文件的音频文件以及视频文件分别解码；将解码后的音频文件以及视频文件进行编码，并将编码后的传输文件通过数据传输通道传输至接收端设备。
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种基于WiFi Display的多媒体文件共享系统，该系统包括发送端设备以及接收端设备，
发送端设备与接收端设备之间建立有数据传输通道，发送端设备用于将待共享的多媒体文件的音频文件以及视频文件分别解码，然后将解码后的音频文件以及视频文件进行编码，并将编码后的传输文件通过数据传输通道传输至接收端设备；接收端设备用于接收传输文件，然后解码并播放传输文件。
与接收端设备建立数据传输通道的步骤具体包括：通过WiFi-P2P技术与接收端设备连接，并建立RTSP协议传输通道；用以将编码后的传输文件通过RTSP协议传输通道传输至接收端设备。
将待共享的多媒体文件的音频文件以及视频文件分别解码的步骤具体包括：将待共享的多媒体文件的音频文件以及视频文件分别放入不同的多媒体文件缓冲区；分别利用音频解码器对待共享的多媒体文件的音频文件进行解码，以及利用视频解码器对待共享的多媒体文件的视频文件进行解码；分别将解码后的音频文件放入音频文件缓冲区，以及将解码后的视频文件放入视频文件缓冲区。
本发明的有益效果是：相比于现有技术直接获取移动终端屏幕显示内容进行多媒体文件共享，本发明发送端设备通过将待共享的多媒体文件的音频文件以及视频文件分别解码、编码，并通过发送端设备与接收端设备建立的数据传输通道，传输至接收端设备，进行解码播放，实现多媒体文件的共享，能够不通过投射设备屏幕显示内容，进行多媒体文件共享，改善使用者的使用体验。
【附图说明】
图1是本发明基于WiFi Display的多媒体文件共享方法第一实施例的流程示意图；
图2是本发明基于WiFi Display的多媒体文件共享方法第二实施例的结构示意图；
图3是本发明基于WiFi Display的多媒体文件共享方法第三实施例的流程示意图；
图4是本发明发送端设备一实施例的结构示意图；
图5是本发明基于WiFi Display的多媒体文件共享方法第四实施例的流程示意图；
图6是本发明接收端设备一实施例的结构示意图；
图7是本发明基于WiFi Display的多媒体文件共享方法第五实施例的流程示意图；
图8是本发明基于WiFi Display的多媒体文件共享系统一实施例的结构示意图。
【具体实施方式】
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。
请参阅图1，图1是本发明基于WiFi Display的多媒体文件共享方法第一实施例的流程示意图。
S101：查找设备；
在本实施例中，发送端设备通过Wi-Fi P2P技术查找一定范围内支持Wi-Fi P2P技术的设备，并以列表的形式收集所有支持Wi-Fi P2P技术的接收端设备信息，以供选择建立彼此之间的Wi-Fi P2P连接。
S102：选择设备；
在本实施例中，当发送端设备查找到同样支持Wi-Fi P2P技术的接收端设备，发送端设备可根据需要选择是否与同样支持Wi-Fi P2P技术的接收端设备配对建立连接，例如发送端设备周围存在多个支持Wi-Fi P2P技术的接收端设备，需要选择一个接收端设备进行文件共享。
S103：建立连接；
在本实施例中，发送端设备选定接收端设备之后，通过Wi-Fi P2P技术建立连接，根据技术规范，建立连接关系之后，需要建立关系拥有端以及附属端，当然，发送端设备成为关系拥有端，接收端设备成为附属端，发送端设备向接收端设备发送待共享文件，并在接收端设备上实现播放。
S104：设备协商参数；
在本实施例中，发送端设备向接收端设备发送待共享文件前，需交换参数信息，例如发送端设备与接收端设备支持的音频、视频格式等，统一参数信息之后，二者之间才能进行正常的文件传输，否是将会由于传输文件与二者支持的文件格式不匹配，导致文件传输失败。
S105：传输文件；
在本实施例中，发送端设备与接收端设备完成上述实施例所阐述共享文件的准备工作之后，发送端设备将待共享文件经过MPEG2TS编码后通过RTSP协议传给接收端设备。接收端设备将解码收到的待共享文件，并在接收端设备上加以播放显示。
S106：控制传输文件参数；
在本实施例中，在发送端设备向接收端设备传输待共享文件过程中，发送端设备以及接收端设备可以根据传输状态，例如连接信号强弱、设备电量状况等，调整传输文件，调整内容包括传输文件的压缩率、格式以及分辨率等。
S107：文件传输结束；
在本实施例中，发送端设备与接收端设备之间的文件共享完成之后，发送端设备可以停止整个文件共享流程，并选择与接收端设备断开连接，以使其能够进行其他文件共享操作。
请参阅图2，图2是本发明基于WiFi Display的多媒体文件共享方法第二实施例的结构示意图。
在本实施例中，发送端设备支持Wi-Fi P2P技术，通过Wi-Fi P2P技术扫描获取一定范围内支持Wi-Fi P2P技术的接收端设备，并对扫描到支持Wi-Fi P2P技术的接收端设备发起连接请求，以建立Wi-Fi P2P连接，之后根据发送端设备与接收端设备连接的地址与端口建立RTSP通道，用于二者之间的数据传输，发送端设备与接收端设备之间的数据传输由Session（会话对象）进行管理。
发送端设备与接收端设备建立Wi-Fi P2P连接，发送端设备向接收端设备发送的待共享文件来自SurFaceFlinger（屏幕显示内容），即发送端设备屏幕的显示内容，通过BufferQueue（缓冲队列）获取发送端设备屏幕的显示内容后，经过MPEG2TS编码，对编码后的文件通过RTSP通道进行传输，接收端设备接收到编码后的文件后，进行解码播放。
本实施例所阐述的文件共享方法，发送端设备通过Wi-Fi P2P技术与接收端设备建立连接，并构成RTSP通道，将发送端设备屏幕的显示内容通过RTSP通道传输至接收端设备进行共享播放，当发送端设备执行其他操作，离开共享文件的播放界面时，接收端设备将会同步发送端设备的屏幕，离开共享文件的播放界面，对使用者的使用体验造成不良影响。
请参阅图3，图3是本发明基于WiFi Display的多媒体文件共享方法第三实施例的流程示意图。本实施例与上述实施例的区别在于改变共享文件的数据来源，不直接投射发送端设备屏幕显示内容进行文件共享，包括但不限于以下步骤。
S301：与接收端设备建立数据传输通道；
在本实施例中，发送端设备与接收端设备建立连接关系，以建立数据传输通道，用于发送端设备与接收端设备之间进行数据传输。
可选地，发送端设备可通过Wi-Fi P2P技术查找以发送端设备为中心，一定半径范围内支持Wi-Fi P2P技术的设备，并与查找到的设备建立Wi-Fi P2P连接，以及RTSP协议传输通道，用以进行数据传输。
Miracast是Wi-Fi联盟（Wi-Fi Alliance）对支持Wi-Fi Display功能的设备的认证名称。通过Miracast认证的设备将在最大程度内保持对Wi-Fi Display功能的支持和兼容。由此可知，Miracast考察的就是Wi-Fi Display。而Wi-Fi Display的核心功能就是让设备之间通过Wi-Fi无线网络来分享视音频数据。
Wi-Fi P2P技术是Miracast认证的设备依赖的技术项之一，Wi-Fi P2P技术支持在没有Access Point的情况下，两个Wi-Fi设备建立连接并通信；Wi-Fi Protected Setup用于帮助用户自动配置Wi-Fi网络、添加Wi-Fi设备等；11n/WMM/WPA2：其中，11n就是802.11n协议，它将11a和11g提供的Wi-Fi传输速率从56Mbps提升到300甚至600Mbps。WMM是Wi-Fi Multimedia的缩写，是一种针对实时视音频数据的QoS服务。而WPA2意为Wi-Fi Protected Acess第二版，主要用来给传输的数据进行加密保护。
RTSP实时流传输协议，定义了一对多应用程序如何有效地通过IP网络传送多媒体数据，用于控制声音或影像的多媒体串流协议，并允许同时多个串流需求控制，传输时所用的网络通讯协定并不在其定义的范围内，服务器端可以自行选择使用TCP或UDP以传送串流内容。
S302：将待共享的多媒体文件的音频文件以及视频文件分别解码；
在本实施例中，在发送端设备中，利用Android源码中现有的音视频解码框架，对待共享的多媒体文件进行读取，将读取到待共享的多媒体文件的音频文件以及视频文件分别放入不同的多媒体文件缓冲区，分别利用音频解码器对音频文件进行解码以及利用视频解码器对视频文件进行解码，之后分别将解码后的音频文件以及视频文件分别放入对应的音频文件缓冲区以及视频文件缓冲区。
由于音频文件与视频文件的解码方式存在不同，因此需要通过上述实施例所阐述的解码方式分别对音频文件以及视频文件进行解码，并且在音频文件与视频文件的编解码过程中，分别在音频文件与视频文件中对应增加对位标记，以保证每一帧的视频文件与其所对应音频文件准确配合，即声音与影像画面同步。
S303：将解码后的音频文件以及视频文件进行编码，并将编码后的传输文件通过数据传输通道传输至接收端设备；
在本实施例中，从音频文件缓冲区以及视频文件缓冲区中读取解码后的音频文件以及视频文件，并进行MPEG2-TS通信协议的编码，以形成传输文件，将编码后的传输文件通过RTSP数据传输通道传输至接收端设备，以实现待共享的多媒体文件在接收端设备上解码播放。
MPEG2-TS是用于音效、图像与数据的通信协议，通过对待共享的多媒体文件的音频文件以及视频文件进行MPEG2-TS通信协议编码，以使待共享的多媒体文件的音频文件以及视频文件具备流媒体文件的特性，可以从音频文件以及视频文件任一片段开始独立编解码，即音频文件以及视频文件可以从任一时间点进行播放，也无需等到音频文件以及视频文件完全下载好才可以播放，可以实现边下载边播放音频文件以及视频文件。
请参阅图4，图4是本发明发送端设备一实施例的结构示意图。
在本实施例中，发送端设备能够执行程序以实现如下动作：
与接收端设备建立数据传输通道；
在本实施例中，发送端设备与接收端设备建立连接关系，以建立数据传输通道，用于发送端设备与接收端设备之间进行数据传输。
可选地，发送端设备可通过Wi-Fi P2P技术查找以发送端设备为中心，一定半径范围内支持Wi-Fi P2P技术的设备，并与查找到的设备建立Wi-Fi P2P连接，以及RTSP协议传输通道，用以进行数据传输。
将待共享的多媒体文件的音频文件以及视频文件分别解码；
在本实施例中，在发送端设备中，利用Android源码中现有的音视频解码框架，对待共享的多媒体文件进行读取，将读取到待共享的多媒体文件的音频文件以及视频文件分别放入不同的多媒体文件缓冲区，分别利用音频解码器对音频文件进行解码以及利用视频解码器对视频文件进行解码，之后分别将解码后的音频文件以及视频文件分别放入对应的音频文件缓冲区以及视频文件缓冲区。
将解码后的音频文件以及视频文件进行编码，并将编码后的传输文件通过数据传输通道传输至接收端设备；
在本实施例中，发送端设备从音频文件缓冲区以及视频文件缓冲区中读取解码后的音频文件以及视频文件，并进行MPEG2-TS通信协议的编码，以形成传输文件，将编码后的传输文件通过RTSP数据传输通道传输至接收端设备，以实现待共享的多媒体文件在接收端设备上解码播放。
请参阅图5，图5是本发明基于WiFi Display的多媒体文件共享方法第四实施例的流程示意图。本实施例所阐述基于WiFi Display的多媒体文件共享方法，包括但不限于以下步骤。
S501：与发送端设备建立数据传输通道；
在本实施例中，接收端设备与发送端设备建立连接关系，以建立数据传输通道，用于接收端设备与发送端设备之间进行数据传输。
可选地，接收端设备可通过Wi-Fi P2P技术与发送端设备建立Wi-Fi P2P连接，以及RTSP协议传输通道，用以进行数据传输。
S502：接收编码后的传输文件；
在本实施例中，接收端设备通过RTSP协议传输通道接收发送端设备传输的编码后的传输文件，在发送端设备对解码后的音频文件以及视频文件进行编码，以使音频文件以及视频文件具备流媒体文件特性，同时对音频文件以及视频文件进行加密，以避免在传输过程中被恶意篡改，保证音频文件以及视频文件在传输过程中的安全性。
S503：解码并播放传输文件；
在本实施例中，接收端设备所接受来自发送端设备的传输文件通过MPEG2-TS通信协议编码，在接收端设备同样对传输文件进行MPEG2-TS通信协议解码，并加以显示，从而实现发送端设备与接收端设备的多媒体文件共享。
请参阅图6，图6是本发明接收端设备一实施例的结构示意图。
在本实施例中，接收端设备能够执行程序以实现如下动作：
与发送端设备建立数据传输通道；
在本实施例中，接收端设备与发送端设备建立连接关系，以建立数据传输通道，用于接收端设备与发送端设备之间进行数据传输。
可选地，接收端设备可通过Wi-Fi P2P技术与发送端设备建立Wi-Fi P2P连接，以及RTSP协议传输通道，用以进行数据传输。
接收编码后的传输文件；
在本实施例中，接收端设备通过RTSP协议传输通道接收发送端设备传输的编码后的传输文件，在发送端设备对解码后的音频文件以及视频文件进行编码，以使音频文件以及视频文件具备流媒体文件特性，同时对音频文件以及视频文件进行加密，以避免在传输过程中被恶意篡改，保证音频文件以及视频文件在传输过程中的安全性。
解码并播放传输文件；
在本实施例中，接收端设备所接受来自发送端设备的传输文件通过MPEG2-TS通信协议编码，在接收端设备同样对传输文件进行MPEG2-TS通信协议解码，并加以显示，从而实现发送端设备与接收端设备的多媒体文件共享。
请参阅图7，图7是本发明基于WiFi Display的多媒体文件共享方法第五实施例的流程示意图。
S701：发送端设备与接收端设备建立数据传输通道；
在本实施例中，发送端设备与接收端设备建立连接关系，以建立数据传输通道，用于发送端设备与接收端设备之间进行数据传输。
可选地，发送端设备可通过Wi-Fi P2P技术查找以发送端设备为中心，一定半径范围内支持Wi-Fi P2P技术的设备，并与查找到的设备建立Wi-Fi P2P连接，以及RTSP协议传输通道，用以进行数据传输。
可选地，发送端设备与接收端设备建立数据传输通道之后，还包括对发送端设备与接收端设备间的多媒体参数进行校核的步骤，以统一发送端设备与接收端设备的多媒体参数，例如发送端设备与接收端设备支持的音频、视频格式等。
S702：发送端设备将待共享的多媒体文件的音频文件以及视频文件分别解码；
在本实施例中，在发送端设备中，利用Android源码中现有的音视频解码框架，对待共享的多媒体文件进行读取，将读取到待共享的多媒体文件的音频文件以及视频文件分别放入不同的多媒体文件缓冲区，分别利用音频解码器对音频文件进行解码以及利用视频解码器对视频文件进行解码，之后分别将解码后的音频文件以及视频文件分别放入对应的音频文件缓冲区以及视频文件缓冲区。
S703：发送端设备将解码后的音频文件以及视频文件进行编码，并将编码后的传输文件通过数据传输通道传输至接收端设备；
在本实施例中，从音频文件缓冲区以及视频文件缓冲区中读取解码后的音频文件以及视频文件，并进行MPEG2-TS通信协议的编码，以形成传输文件，将编码后的传输文件通过RTSP数据传输通道传输至接收端设备，以实现待共享的多媒体文件在接收端设备上解码播放。
S704：接收端设备接收传输文件；
在本实施例中，接收端设备通过RTSP协议传输通道接收发送端设备传输的编码后的传输文件，在发送端设备对解码后的音频文件以及视频文件进行编码，以使音频文件以及视频文件具备流媒体文件特性，同时对音频文件以及视频文件进行加密，以避免在传输过程中被恶意篡改，保证音频文件以及视频文件在传输过程中的安全性。
S705：接收端设备解码并播放传输文件；
在本实施例中，接收端设备所接受来自发送端设备的传输文件通过MPEG2-TS通信协议编码，在接收端设备同样对传输文件进行MPEG2-TS通信协议解码，并加以显示，从而实现发送端设备与接收端设备的多媒体文件共享。
请参阅图8，图8是本发明基于WiFi Display的多媒体文件共享系统一实施例的结构示意图。
在本实施例中，多媒体文件共享系统800包括发送端设备801以及接收端设备802；发送端设备801与接收端设备802之间建立有数据传输通道，发送端设备801将待共享的多媒体文件的音频文件以及视频文件分别解码，然后将解码后的音频文件以及视频文件进行编码，并将编码后的传输文件通过数据传输通道传输至接收端设备802；接收端设备802接收传输文件，然后解码并播放传输文件。
本实施例所阐述多媒体文件共享系统800能够实现上述实施例所阐述基于WiFi Display的多媒体文件共享方法，在此就不再赘述。
综上所述，本发明在发送端设备中将待共享文件的音频文件以及视频文件分别编解码，通过MPEG2-TS通信协议编码并通过RTSP协议传输通道传输至接收端设备，进行解码播放，代替直接将发送端设备屏幕显示内容在接收端设备上显示，不需要发送端设备保持播放多媒体文件界面就可实现多媒体文件共享，发送端设备可以执行除播放待共享的多媒体文件之外的其他操作，而不会影响接收端设备播放多媒体文件，改善使用者的使用体验。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (13)

  1. 一种基于WiFi Display的多媒体文件共享系统，其中，所述系统包括发送端设备以及接收端设备；所述发送端设备与所述接收端设备之间建立有数据传输通道，所述发送端设备用于将待共享的多媒体文件的音频文件以及视频文件分别解码，然后将解码后的音频文件以及视频文件进行编码，并将编码后的传输文件通过所述数据传输通道传输至所述接收端设备；所述接收端设备用于接收所述传输文件，然后解码并播放所述传输文件；
    所述与接收端设备建立数据传输通道的步骤具体包括：通过WiFi-P2P技术与所述接收端设备连接，并建立RTSP协议传输通道；用以将所述编码后的传输文件通过所述RTSP协议传输通道传输至所述接收端设备；
    所述将待共享的多媒体文件的音频文件以及视频文件分别解码的步骤具体包括：
    将所述待共享的多媒体文件的音频文件以及视频文件分别放入不同的多媒体文件缓冲区；
    分别利用音频解码器对所述待共享的多媒体文件的音频文件进行解码，以及利用视频解码器对待共享的多媒体文件的视频文件进行解码；
    分别将解码后的音频文件放入音频文件缓冲区，以及将解码后的视频文件放入视频文件缓冲区。
  2. 根据权利要求1所述的系统，其中，所述将解码后的音频文件以及视频文件进行编码的步骤具体包括：将解码后的音频文件以及视频文件进行MPEG2-TS通信协议的编码，以形成所述传输文件。
  3. 根据权利要求1所述的系统，其中，所述发送端设备与所述接收端设备建立数据传输通道之后，还包括对所述发送端设备与所述接收端设备间的多媒体参数进行校核的步骤，以统一所述发送端设备与所述接收端设备的多媒体参数。
  4. 一种基于WiFi Display的多媒体文件共享方法，其中，所述方法包括：
    与接收端设备建立数据传输通道；
    将待共享的多媒体文件的音频文件以及视频文件分别解码；
    将解码后的音频文件以及视频文件进行编码，并将编码后的传输文件通过所述数据传输通道传输至所述接收端设备。
  5. 根据权利要求4所述的方法，其中，所述与接收端设备建立数据传输通道的步骤具体包括：通过WiFi-P2P技术与所述接收端设备连接，并建立RTSP协议传输通道；用以将所述编码后的传输文件通过所述RTSP协议传输通道传输至所述接收端设备。
  6. 根据权利要求4所述的方法，其中，所述将待共享的多媒体文件的音频文件以及视频文件分别解码的步骤具体包括：
    将所述待共享的多媒体文件的音频文件以及视频文件分别放入不同的多媒体文件缓冲区；
    分别利用音频解码器对所述待共享的多媒体文件的音频文件进行解码，以及利用视频解码器对待共享的多媒体文件的视频文件进行解码；
    分别将解码后的音频文件放入音频文件缓冲区，以及将解码后的视频文件放入视频文件缓冲区。
  7. 根据权利要求6所述的方法，其中，所述将解码后的音频文件以及视频文件进行编码的步骤具体包括：将解码后的音频文件以及视频文件进行MPEG2-TS通信协议的编码，以形成所述传输文件。
  8. 根据权利要求4所述的方法，其中，与所述接收端设备建立数据传输通道之后，还包括与所述接收端设备的多媒体参数进行校核的步骤，以统一与所述接收端设备的多媒体参数。
  9. 一种基于WiFi Display的多媒体文件共享设备，其中，所述设备能够执行程序以实现如下动作：
    与接收端设备建立数据传输通道；
    将待共享的多媒体文件的音频文件以及视频文件分别解码；
    将解码后的音频文件以及视频文件进行编码，并将编码后的传输文件通过所述数据传输通道传输至所述接收端设备。
  10. 根据权利要求9所述的设备，其中，所述与接收端设备建立数据传输通道的步骤具体包括：通过WiFi-P2P技术与所述接收端设备连接，并建立RTSP协议传输通道；用以将所述编码后的传输文件通过所述RTSP协议传输通道传输至所述接收端设备。
  11. 根据权利要求9所述的设备，其中，所述将待共享的多媒体文件的音频文件以及视频文件分别解码的步骤具体包括：
    将所述待共享的多媒体文件的音频文件以及视频文件分别放入不同的多媒体文件缓冲区；
    分别利用音频解码器对所述待共享的多媒体文件的音频文件进行解码，以及利用视频解码器对待共享的多媒体文件的视频文件进行解码；
    分别将解码后的音频文件放入音频文件缓冲区，以及将解码后的视频文件放入视频文件缓冲区。
  12. 根据权利要求11所述的设备，其中，所述将解码后的音频文件以及视频文件进行编码的步骤具体包括：将解码后的音频文件以及视频文件进行MPEG2-TS通信协议的编码，以形成所述传输文件。
  13. 根据权利要求9所述的设备，其中，与所述接收端设备建立数据传输通道之后，还包括与所述接收端设备的多媒体参数进行校核的步骤，以统一与所述接收端设备的多媒体参数。
PCT/CN2018/105204 2017-09-12 2018-09-12 基于WiFi Display的多媒体文件共享方法、设备以及系统 WO2019052463A1 (zh)

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