PREDICTIVE QUANTIZATION CODING METHOD AND VIDEO COMPRESSION SYSTEM
First Claim
1. A predictive quantization coding method, comprising steps of:
- (a) dividing a pixel to be processed into a plurality of pixel components, wherein pixels of an image are sequentially taken as the pixel to be processed;
(b) obtaining one pixel component to be processed from the plurality of pixel components;
(c) obtaining texture direction gradients of the pixel component to be processed;
(d) obtaining reference pixels according to the texture direction gradients and positional relationships between the pixel component to be processed and a remaining of the plurality of pixel components;
(e) obtaining a prediction residual of the pixel component to be processed according to the reference pixels;
(f) repeating steps (b) to (e), and taking each pixel component of the plurality of pixel components and obtaining the prediction residual corresponding thereto, and forming a prediction residual code stream including the prediction residuals of the pixel to be processed of the image;
(g) dividing the prediction residual code stream into a plurality of quantization units each including a predetermined number of prediction residuals divided from the prediction residual code stream; and
(h) obtaining first rate distortion optimizations and second rate distortion optimizations corresponding to the plurality of quantization units to obtain a quantization residual code stream.
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Abstract
The present invention relates to a predictive quantization coding method and a video compression system. The method includes: dividing a pixel to be processed into a plurality of pixel components; obtaining one pixel component to be processed and texture direction gradients thereof; obtaining reference pixels and a prediction residual of the pixel component to be processed; forming a prediction residual code stream; dividing the prediction residual code stream into multiple quantization units; and obtaining a quantization residual code stream. The present invention can reduce the transmission bandwidth, and reduce the theoretical limit entropy and complexity.
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10 Claims
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1. A predictive quantization coding method, comprising steps of:
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(a) dividing a pixel to be processed into a plurality of pixel components, wherein pixels of an image are sequentially taken as the pixel to be processed; (b) obtaining one pixel component to be processed from the plurality of pixel components; (c) obtaining texture direction gradients of the pixel component to be processed; (d) obtaining reference pixels according to the texture direction gradients and positional relationships between the pixel component to be processed and a remaining of the plurality of pixel components; (e) obtaining a prediction residual of the pixel component to be processed according to the reference pixels; (f) repeating steps (b) to (e), and taking each pixel component of the plurality of pixel components and obtaining the prediction residual corresponding thereto, and forming a prediction residual code stream including the prediction residuals of the pixel to be processed of the image; (g) dividing the prediction residual code stream into a plurality of quantization units each including a predetermined number of prediction residuals divided from the prediction residual code stream; and (h) obtaining first rate distortion optimizations and second rate distortion optimizations corresponding to the plurality of quantization units to obtain a quantization residual code stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification