Video coding/decoding method and device as well as video playing method, device and system

Abstract

The embodiment of the invention discloses a video coding/decoding method and a device as well as a video playing method, a device and a system, which relate to the technical field of communication. The invention is invented for solving the problem of time delay generated between a program watched by users and a program played at real time in the same direct broadcast channel in the prior art as the access moment of the users is different, the current access frame is not an I frame, and a flow medium server always begins to transmit data to the users according to the I frame which is proximateto the current access frame of the users in a buffer area so as to cause different programs watched by the users accessing at the same time and different moment. The embodiment of the invention provides a video coding method. The method comprises the following steps: carrying out interframe coding on a source image to obtain a P frame by a coder; carrying out intraframe coding on the source imageand obtaining an I frame corresponding to the P frame; and storing the I frame corresponding to the P frame in a buffer memory of the coder. By the invention, the accessed users can watch live programs at real time.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to video codec technology. Background technique [0002] Due to the real-time nature of live broadcast data, users are required to watch the same channel no matter when they access it, and the programs they watch are the same. In fact, each client is required to receive the same media data almost at the same time. Streaming media is generally transmitted using an image sequence such as "IPPPPPPPPI", wherein, in the string of double quotes, I represents an I frame, and P represents a P frame. Because the P frame must be decoded according to the I frame, if the user does not access when the I frame is sent, that is, the first data received by the client is not an I frame, and the client cannot decode it until it receives the I frame. next I-frame. In this way, a serious blurred screen or black screen will inevitably appear in a short period of time from the moment when the us...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem in the prior art, since the current access frame is not an I frame when the user accesses the same live channel, the streaming media server always starts to send the I frame to the user according to the I frame closest to the user's current access frame in the buffer area. data, resulting in

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