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Auxiliary data flow transmission method and system and devices

A transmission method and data flow technology, which is applied in the field of wireless transmission, can solve the problems that there is no auxiliary data flow transmission specification, and the auxiliary information flow that cannot standardize the transmission of multimedia, etc.

Active Publication Date: 2017-09-29
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in many cases, in the actual multimedia playback process, in addition to the above three modes of multimedia streams, it is also necessary to include corresponding multimedia auxiliary data streams, such as separate subtitle streams, separate UI streams, mixed audio streams, etc. etc.; but the current Miracast protocol specification does not regulate the transmission of auxiliary data streams, therefore, current devices cannot transmit multimedia auxiliary information streams through Miracast protocol specifications

Method used

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  • Auxiliary data flow transmission method and system and devices
  • Auxiliary data flow transmission method and system and devices
  • Auxiliary data flow transmission method and system and devices

Examples

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Embodiment 1

[0075] see figure 2 , which shows a method for transmitting an auxiliary data stream provided by an embodiment of the present invention, and the method can be applied to figure 1 In the scenario shown, the method can include:

[0076] S201: During the Miracast capability negotiation phase, the source sends a request message for auxiliary data flow support information;

[0077] Wherein, the request message is used to obtain the support information of the auxiliary data flow by the destination end; and the auxiliary data flow support information includes: the format of the auxiliary data flow supported by the destination end and the number of data packets of the auxiliary data flow supported by the destination end ; Specifically, one data packet of the auxiliary data flow represents one transmission of the auxiliary data flow.

[0078] It should be noted that, the technical solution of this embodiment can be applied to a WFD capability negotiation (WFD Capability Negotiation)...

Embodiment 2

[0097] Based on the technical solution of Embodiment 1, see Figure 4, this embodiment provides a specific implementation process of an auxiliary data stream transmission method. In this embodiment, the multimedia data stream that the source device needs to send is the video stream of a foreign movie, and the auxiliary data stream is the video stream of the foreign movie. Original subtitles and Chinese subtitles, understandably, common subtitle encoding formats include unicode, UTF-8, etc. This specific process can include:

[0098] S401: The source end may add additional message parameters in the M3 request message to obtain information about the auxiliary data flow supported by the destination end;

[0099] Specifically, in addition to the parameters transmitted according to the existing Miracast standard, such as Figure 5 In the schematic diagram of the M3 request message shown, in the content of the M3 request message, the parameters in bold italics are used to indicate...

Embodiment 3

[0115] Based on the technical solutions of the foregoing two embodiments, in this embodiment, when the multimedia data stream that the source device needs to send is a video stream of a movie, and the auxiliary data stream is two auxiliary audio streams, the specific process can be as follows: Figure 4 The technical solution shown is carried out, however, the M3 response message and the M4 request message should be correspondingly modified as Figure 10 and Figure 11 The content of the message shown.

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Abstract

The embodiment of the invention discloses an auxiliary data flow transmission method and system and devices. The method can comprise the following steps: a source device sends a request message of auxiliary data flow supporting information at a Miracast capability negotiation stage, wherein the request message is used for obtaining the auxiliary data flow supporting information of a sink device; and the source device sends parameter information of the auxiliary data flow according to the auxiliary data flow supporting information and to-be-transmitted auxiliary data flow after receiving the auxiliary data flow supporting information. The auxiliary data flow associated with multimedia data flow can also be transmitted while the multimedia data flow is transmitted, and thus the multimedia data flow and the associated auxiliary data flow can be synchronously played on the sink device.

Description

technical field [0001] The present invention relates to the technical field of wireless transmission, in particular to a method, device and system for transmitting auxiliary data streams. Background technique [0002] Currently, video and audio are streamed directly from one wireless-enabled device to another. Such a system is called "Miracast", which is also called Wi-Fi Display (WFD, Wi-Fi Display). The Miracast specification is designed to stream any type of video or audio bitstream from a source device (Source) to a destination device (Sink). As an example, the source (Source) can be a smart phone, and the destination (Sink) can be a television. Although in a typical IEEE 802.11 wireless network, client devices communicate through an access point (AP) device, there are protocols (such as Wi-Fi Direct) that support direct device communication. Miracast systems then use these protocols to send display data from one device to another, such as from a smartphone to a telev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/41H04N21/434H04N21/4363H04N21/4385H04N21/6437
CPCH04N21/4122H04N21/4126H04N21/4345H04N21/43637H04N21/4385H04N21/6437
Inventor 石祚夫赵旭
Owner CHINA MOBILE COMM GRP CO LTD
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