Video Signal Transmission Method

Abstract

The invention discloses a video signal transmission method. The method comprises the following steps of: setting two communication channels between a server and a client side; placing a frame I of a first image group and a frame B or a frame P of all the image groups in the first communication channel, and orderly transmitting the frames according to the sequence; placing the frame I of each image group behind a second image group in the second channel, and segmenting the frame I into a plurality of frame I segments for transmission, wherein the frame I segments are transmitted by the time slot which is used when transmitting the frame B or the frame P through the first communication channel. The method of the invention can make full use of the time slot of the frame P in network transmission to transmit the enormous data of the next image group in advance, so that a non-real time video streaming can be transmitted and watched more smoothly, and the real-time video stream can be transmitted in real time nearly without loss of image quality.

Description

technical field [0001] The invention relates to video signal processing technology, in particular to a video signal transmission method. Background technique [0002] In the existing mainstream video coding such as H.264 and MPEG4, the group of picture (GroupOfPicture, GOP) method is used for compression coding. The GOP includes three types of frames, namely, I frame, B frame, and P frame. Among them, the I frame is the key frame, the B frame is the backward frame, and the P frame is the reference frame. Generally, I frames in a video are only intra-frame predicted, while B frames or P frames are inter-frame predicted. Different prediction methods make the size of an I frame much larger than that of a B frame or a P frame, and the size of an I frame is between 4 and 5 times that of a B frame or a P frame. For example, in the Xvid encoding format, the size of an I frame of a 640×480 resolution video is 40KB to 60KB, the size of a P frame is 4KB to 6KB, and the data volume ...

AI Technical Summary

Problems solved by technology

[0007] It can be seen from Table 1 that the first frame occupies 21.8KB of data for the I frame, and the transmission delay reaches 87 milliseconds, which causes the playback of the entire GOP to be delayed by nearly 16 milliseconds.

With the transmission of each GOP, this delay loss will gradually accumulate, so that serious delay and distortion will be generated in the end, which is difficult to accept in the field of real-time video processing

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