Code rate control method and device, storage medium and electronic equipment

Abstract

The invention discloses a code rate control method and device, a storage medium and electronic equipment. The method comprises the following steps: under the condition that the ith frame of image to be transmitted is the ROI frame of image, transmitting the ROI frame of image, obtaining an ith frame initial quantization parameter QPi_init_roi and an i-th frame estimated frame size Bit_error_roi output by the ROI frame code control model, and obtaining an i-th frame estimated frame size Bit_error_roi, wherein the QPi_init_roi and the Biit_estite_roi are determined and obtained according to an (i-1)th frame average quantization parameter QPi-1_real obtained by encoding an (i-1)th frame of image and an actual frame size Biti-1_real of the (i-1)th frame; using QPi_init_roi and Bit_estrite_roifor encoding the ith frame of image, and encoding the ith frame of image; using the QPi_init_roi and the Bit_estrite_roi for encoding the ith frame of image to obtain an ith frame average quantizationparameter QPi_real_roi and an ith frame actual frame size Bit_real_roi obtained by encoding the ith frame image; determining an ith frame update quantization parameter QPi_nonroi according to the QPi_real_roi; according to the Bit_real_roi, determining the size Bit_nonroi of an ith frame updating frame, wherein the QPi_nonroi is larger than the QPi_real_roi, and the Bit_nonroi is smaller than theBit_real_roi; and determining the first target parameter of the (i+1)th frame in the non-ROI frame code control model by using QPi_nonroi and Bit_nonroi, wherein the first target parameter is used for determining an (i+1)th frame initial quantization parameter QPi+1_init_nonroi and an (i+1)th frame estimated frame size Bit+1_estrite_nonroi under the condition that the (i+1)th frame image is a non-ROI frame image.

Description

technical field [0001] The present invention relates to the computer field, and in particular, relates to a code rate control method and device, a storage medium and electronic equipment. Background technique [0002] When users watch a frame, they are often only interested in a part of the frame. We call this region ROI. For video software and video websites, in order to give users a better viewing experience, it is hoped that the bit rate can be allocated to the ROI, and the bit rate obtained by the non-ROI remains unchanged, that is, the image quality of the ROI is enhanced, and the image quality of the non-ROI and Originally kept the same. [0003] In related technologies, a common ROI code rate control method is as follows: after the ROI is detected, a QP-OFFSET table is generated according to the detection information, and then the table is transmitted to the encoder. When encoding a specific CTU, the encoder adjusts the QP of the current CTU according to the value o...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a code rate control method and device, a storage medium, and electronic equipment to at least solve the technical problem of code rate waste when performing code rate control

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