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Mobile phone screen projection method for synchronizing attached audio

A mobile phone and audio technology, which is applied in the field of synchronous mobile phone screen projection with audio, can solve the problems of synchronous transmission function without audio and cannot achieve synchronous output of audio and video, and achieve the effect of high audio and video processing and transmission efficiency

Inactive Publication Date: 2018-10-19
深圳市乐望崇智科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Today, with the increasingly powerful functions of smartphones, many users have begun to use smartphones for conference office and distance education by using the screen projection function of smartphones. However, the screen projection function of existing smartphones does not have audio synchronization transmission function Achieve synchronous output of audio and video

Method used

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  • Mobile phone screen projection method for synchronizing attached audio

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 As shown, the method of synchronizing mobile screen projection with audio includes the following steps:

[0023] S1. Connect the mobile terminal to the local area network to discover the relevant PC terminal in the local area network through UDP broadcast, and establish a TCP connection with the PC terminal;

[0024] S2. Establish a screen projection extension unit and an audio extension unit on the mobile phone, and the screen projection extension unit and the audio extension unit use the same reference clock;

[0025] S3. The screen projection expansion unit collects the screen video stream, encodes the video, and stamps it with a time stamp. The audio expansion unit collects the audio played by the mobile phone system and the audio input by the microphone, encodes the audio, and stamps a synchronous time stamp;

[0026] S4. Adjust the bit rate of the encoded video data and the encoded audio data, and integrate and package them and transmit them to t...

Embodiment 2

[0029] As an optimization of the above embodiment, the screen projection extension unit and the audio extension unit are integrated into one APP for downloading and use; in step S3, the video encoding adopts H264 encoding, and the audio encoding adopts ADPCM encoding to improve encoding efficiency, and shorten the codec delay; in step S5, the computer end is provided with a drive unit, and the drive unit drives the computer end to automatically complete the decoding and synchronous playback of audio and video data.

Embodiment 3

[0031] In step S3, after the audio extension unit collects the audio, it performs echo cancellation and noise reduction processing on the audio to improve the output sound quality; the screen projection extension unit and the audio extension unit can open the application separately to realize the screen projection function and audio transmission function alone.

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Abstract

The invention discloses a mobile phone screen projection method for synchronizing attached audio. The method comprises the following steps: S1, accessing a mobile phone terminal to a local area network to discover a relevant PC terminal in the local area network through UDP broadcast, and establishing a TCP connection with thePC terminal; S2, establishing a screen projection extension unit and anaudio extension unit at the mobile phone terminal, wherein the screen projection extension unit and the audio extension unit adopt the same reference clock; S3, collecting, by the screen projection extension unit, a screen video stream, performing video encoding and marking a timestamp, collecting, by the audio extension unit, audio played by a mobile phone system and the audio input by a microphone, performing audio encoding and marking a synchronization timestamp; S4, performing code rate adjustment on the encoded video data and the encoded audio data, and integrating, packaging and transmitting the data to the PC terminal; and S5, decoding, by the PC terminal, the video stream data and the audio stream data at the same time, and synchronously playing the video and audio according to thetimestamp. When the mobile phone screen projection method is applied, the video stream and the audio stream on the screen can be collected at the same time for encoding and transmission and are decoded and synchronously played.

Description

technical field [0001] The invention relates to a mobile phone screen projection processing technology, in particular to a mobile phone screen projection method with synchronous audio. Background technique [0002] Today, with the increasingly powerful functions of smartphones, many users have begun to use smartphones for conference office and distance education by using the screen projection function of smartphones. However, the screen projection function of existing smartphones does not have audio synchronization transmission function Achieve synchronous output of audio and video. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the present invention provides a synchronous audio projection method for a mobile phone. When applied, the audio can be collected and output synchronously when the mobile phone is projecting a screen. [0004] The present invention is realized through the following technical solutions: [0005] The method of synch...

Claims

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Application Information

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IPC IPC(8): H04N21/41H04N21/43H04N21/436H04N21/439H04N21/4408H04N21/8547
CPCH04N21/4126H04N21/4122H04N21/4307H04N21/43615H04N21/4398H04N21/4408H04N21/8547
Inventor 梅丙坤
Owner 深圳市乐望崇智科技有限公司