PATENT CLAIM ANALYSIS

Application Number: 16038154
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2020-01
Patent Classification: ["375", "240020"]

Abstract:
A method based on CTU level rate-distortion optimization for rate control in video coding which can effectively improve the perceptual rate-distortion performance and coding efficiency is provided. Firstly, a perceptual rate-distortion model is established using a divisive normalization framework, which characterizes the relationship between local visual quality and coding bits. Subsequently, the established perceptual rate-distortion model is applied to overall distortion optimization which is transformed into a global optimization problem and solved with convex optimization algorithms to obtain optimal CTU level coding bit allocation.

Claim (Index 1):
An encoding method in an encoding device using coding tree unit (CTU) level rate-distortion (R-D) optimization for rate control (RC) in video coding, comprising:\n generating, in an encoding device, multiple frames of a received input video in a frame generating module; generating, in the coding device, one or more coding tree units from at least one frame of the received input video; dividing a frame of the input video into one or more CTUs in a CTU module; determining one or more CTU level coding bits through R-D performance optimization, comprising using a divisive normalization framework to characterize a CTU level perceptual distortion (D\u2032(R)), in relation with a CTU level mean square error (MSE) distortion (D(R)), and a divisive normalized factor (f), by:\n D \u2032( R )= D ( R )/ f 2 , \n where R is the CTU level coding bit rate; wherein the relationship between the perceptual distortion D\u2032(R) and the bit rate R is depicted with a R-D logarithmic model:\n D \u2032( R )= ln ( c\u00d7R \u2212k ) \n where c and k are model parameters depending on the video content;\n estimating the model parameters k of the frame on basis of the coding statistics of a previous frame; wherein an optimal value of a parameter k j  for a j-th CTU in the current frame is obtained by minimizing the difference between a true distortion D real  of a co-located j-th CTU in the previous frame and an estimated distortion D comp  for the j-th CTU of the current frame; and \n generating a video bitstream based on coded video.

Metadata:
- Claim Count in Document: 16.0
- Percentile: 95.0
- Lexical Diversity: 1.52542
- Patent Class: 375.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15352222', '16016691', '15260302', '12832495', '11530042']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.450148245888154
- 35 USC 102 Novelty (BERT): 0.5325726616884972
- Combined Prediction Score: 0.4583906874681884
- Mean Citation Score: 279.06874200000004
- Max Citation Score: 346.58685
- Similarity Product: 248.64729876405

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test