Video frame sequential transmission method and system

A sequential transmission and video frame technology, applied in the direction of digital video signal modification, image communication, selective content distribution, etc., can solve the problems of video frame decoding time and display time inconsistency, video cannot be decoded normally, etc., to ensure sequential transmission Effect

Pending Publication Date: 2022-03-11
HANGZHOU ARCVIDEO TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem in the prior art that the video cannot be decoded normally after network transmission, or the decoding time of the encoded video frame is inconsistent with the display time, the present invention provides a method and system for sequential transmission of video frames

Method used

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  • Video frame sequential transmission method and system
  • Video frame sequential transmission method and system

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Embodiment 1

[0045] A method for sequential transmission of video frames, applied to network transmission, including a main screen terminal and at least one secondary screen terminal; the method includes,

[0046] For home screen:

[0047] Acquisition of the video frame, the main screen parses the video source to obtain the video frame, and the timestamp corresponding to the video frame is the display time;

[0048] Encoding of video frame information, adding the time stamp corresponding to the video frame to the extended information of the video frame, modifying the time stamp corresponding to the video frame as the decoding time;

[0049] For the secondary screen:

[0050] To obtain video frame information, the encoded video frame is transmitted to the secondary screen through network transmission; the timestamp corresponding to the video frame obtained by the secondary screen is the decoding time;

[0051] Decode the video frame information, analyze the extended information of the vid...

Embodiment 2

[0058] On the basis of Embodiment 1, this embodiment is a system for sequential transmission of video frames. In network transmission, it includes a main screen terminal and at least one group of secondary screen terminals; it includes a video frame acquisition module at the main screen terminal and an encoding module for video frame information. , an acquisition module of video frame information at the secondary screen, a decoding module of video frame information and a video frame playback module;

[0059] For home screen:

[0060] The main screen end video frame acquisition module, the main screen end analyzes the video source to obtain the video frame, and the time stamp corresponding to the video frame is the display time;

[0061] The encoding module of the video frame information adds the time stamp corresponding to the video frame to the extended information of the video frame, and modifies the time stamp corresponding to the video frame as the decoding time;

[0062]...

Embodiment 3

[0070] On the basis of the above-mentioned embodiments, the encoding format of the video in this embodiment is H264, and one frame of H264 data is composed of several NAL units; the network transmission protocol adopts the RTP protocol; The timestamp is the display time; modify the H264 stream data, add an SEI unit, and the SEI unit supplements enhanced information, which is a type of NAL_Unit_Type. You can customize and edit the information in this NAL unit. The SEI unit information includes the display time, and at the same time Modify the timestamp corresponding to this frame to the decoding time;

[0071] It is transmitted to the secondary screen through the RTP protocol, and the time stamp corresponding to this frame is the decoding time;

[0072] Analyze the SEI unit of this frame to obtain the display time corresponding to this frame; send the H264 frame data with the display time back to the decoder in the order of decoding time;

[0073] The secondary screen displays...

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Abstract

The invention relates to a multi-screen sharing technology, and discloses a video frame sequential transmission method and system, which are applied to multi-screen network transmission, and the method comprises the following steps: a main screen end analyzes a video source to obtain a video frame, and a timestamp corresponding to the video frame is display time; adding the timestamp corresponding to the video frame into the extension information of the video frame, and modifying the timestamp corresponding to the video frame into decoding time; the secondary screen end is used for transmitting the coded video frame to the secondary screen end through network transmission; the timestamp corresponding to the video frame obtained by the auxiliary screen end is decoding time; analyzing the extension information of the video frames to obtain the display time of the video frames, and sending the video frames to a decoder of an auxiliary screen end according to the sequence of the decoding time; and the secondary screen end displays the video content according to the sequence of the decoding time. By adding the extension information conforming to the corresponding coding format to the code stream of the video frame, the sequential transmission of the video frame is ensured.

Description

technical field [0001] The invention relates to multi-screen sharing technology, in particular to a method and system for sequential transmission of video frames in multi-screen network transmission. Background technique [0002] In the application of multi-screen sharing, the video content of the main screen needs to be transmitted to each secondary screen through the network transmission protocol. In the current traditional technology, the time stamp of the video is mostly placed in the protocol header of the network transmission protocol for transmission. , in the receiving end, the frames will be sorted according to the size of the timestamp. This mode is no problem for a part of the video (the decoding time of these video frames is equal to the display time), but as the video resolution becomes higher, with With the development of video coding technology, the decoding time of many videos is inconsistent with the display time. After analyzing the video stream, the player...

Claims

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Application Information

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IPC IPC(8): H04N21/8547H04N19/127
CPCH04N21/8547H04N19/127
Inventor 杨阳文志平裘昊张华陈勇
Owner HANGZHOU ARCVIDEO TECHNOLOGY CO LTD
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