Vast-scale buffering policy-based audio/video code stream control method

Abstract

The invention provides a vast-scale buffering policy-based audio / video code stream control method. On the basis of vast-scale buffering data capacity of Internet audio / video transmission and application and other links, stream control parameters are artificially set; a coding system automatically and dynamically regulates code parameters to ensure that an audio / video code stream does not exceed a buffering upper limit of a given and specific transmission bandwidth at any time range, so that smooth and high-quality audio / video files can be displayed under a condition of finite transmission bandwidth. According to the characteristics of the transmission and displaying of an Internet audio / video stream, the method can prevent immanent problems of CBR and VBR stream control, can overcome a defect of ABR stream control that control mechanism is unmatched with the buffering policy, and can eliminate factors affecting code quality in VBV and HRD modes, i.e. undersize stream control particle size, strict overflow control and the like.

Description

technical field [0001] The invention relates to an audio and video encoding method, in particular to an audio and video encoding flow control method based on a large-scale buffer strategy. Background technique [0002] A video is composed of a series of continuous images, each of which is called a frame, and the number of images contained in a video per second is called a frame rate (fps). Code flow control is to determine the number of bits occupied by each coding component according to a certain method, then control each coding link, and finally adjust the number of output bits of the encoder per unit time. [0003] The current audio and video flow control methods mainly include: CBR mode, VBR mode, and ABR (MBR) mode. [0004] The CBR mode is mainly suitable for the transmission of audio streams through the radio and television network, and its characteristic is that the bit rate remains constant at any time. However, the Internet is an IP-based packet switching transmi...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the above-mentioned defects of the prior art, the present invention provides an audio and video encoding flow control method based on a large-scale buffer strategy, which can avoid the inherent problems of CBR and VBR flow control, and can also solve the problems of the control mechanism and the ABR flow control. The shortcomings of buffering strategy mismatch can also solve the factors that affect the encoding quality, such as too small flow control granularity and strict overflow control in VBV and HRD modes

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