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Systems and methods for changing rate-control setting during video encoding

A technology of bit rate control and video coding, which is applied in the field of video coding and can solve problems such as poor coding quality and inconsistent coding quality

Active Publication Date: 2010-07-07
XUESHAN TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for a video frame segment with simple content, it has good encoding quality, but for a video frame segment with complex content, it leads to poor encoding quality
In short, encoding with a fixed bitrate can lead to inconsistent encoding quality

Method used

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  • Systems and methods for changing rate-control setting during video encoding

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Embodiment Construction

[0044]The MPEG or H.26x standard ensures that standardized files produced by video coding systems can be opened and run on any system equipped with a standard-compliant decoder. The spatial and temporal redundancy of data included in digital video allows it to be compressed without significant loss in quality. MPEG encoding is a general standard, not application-specific, and involves compression based on statistical redundancy in time and space. Spatial redundancy is the similarity of the color values ​​of adjacent pixels in the same picture. MPEG encoding uses discrete cosine transform (Discrete Cosine Transform, DCT) to perform spatial compression within a picture to remove spatial redundancy. Temporal redundancy refers to the same movement between video frames, visually providing smooth and realistic motion. For temporal compensation between pictures, MPEG relies on prediction, more precisely, motion-compensated prediction or inter-picture prediction. MPEG utilizes I pi...

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Abstract

The invention provides a system and method for changing rate-control setting during video encoding. The Method for changing at least a rate-control (RC) setting during video encoding, performed by an RC controller and a video encoder, are provided. The method comprises determining whether change in the RC setting is allowed for encoding a next portion of a video sequence, detecting a request for changing the RC setting before encoding the next portion of the video sequence if the RC setting is allowed to be changed; and executing video encoding for the next portion of the video sequence ceaselessly utilizing the changed RC setting when detecting the request. The invention can make the encoding quality generated with changed rate encoding being more identical then that generated with the permanent rate encoding.

Description

technical field [0001] The invention relates to a video encoding technology, especially a system and method for changing bit rate control setting during video encoding (Systems and Methods for Changing Rate-Control Setting During Video Encoding). Background technique [0002] A video sequence (VS) can be regarded as a series of still images, which requires a large amount of storage space and transmission bandwidth. For a full-color digital video with a resolution of 640×480, 15 frames per second, and 90 minutes, the required bandwidth is: [0003] 640×480(pixels / frame)×3(bytes / pixel)×15(pictures / sec)=13.18MB / sec [0004] And the required storage space is 13.18MB / sec×90×60=69.50GB. Such a large digital video stream is obviously not conducive to the real-time transmission and storage of data. Therefore, various encoding technologies have also been developed accordingly to reduce the required memory and transmission bandwidth. [0005] The MPEG standard ensures that standard...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/24H04N7/32H04N7/50
CPCH04N19/00781H04N19/00127H04N19/0006H04N19/0023H04N19/0009H04N19/00751H04N19/00054H04N19/115H04N19/61H04N19/114H04N19/124H04N19/132H04N19/162H04N19/587H04N19/146
Inventor 郭志辉
Owner XUESHAN TECH INC
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