PATENT CLAIM ANALYSIS

Application Number: 15921302
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["375", "240030"]

Abstract:
A method of determining a maximum permissible key frame distance for use in encoding image frames in a video sequence comprising encoding a plurality of video test sequences, each video test sequence having a respective noise level, where each video test sequence is encoded using a respective quantization parameter and a plurality of key frame distances is disclosed. For each video test sequence, an output bitrate is determined for each key frame distance. For each combination of noise level, quantization parameter, and key frame distance, the determined output bitrate is stored and a maximum key frame distance at which output bitrate decreases in response to an increase in key frame distance is identified as maximum permissible key frame distance. A method of encoding image frames in a video sequence is also disclosed, as well as a system, a camera and a computer program product for performing the methods.

Claim (Index 4):
A method of encoding image frames in a video sequence, said image frames being encoded into a sequence of output image frames arranged in groups of pictures, each group of pictures comprising an intra-frame and one or more subsequent inter-frames, each group of pictures in said sequence of output image frames having a key frame distance defined by a number of frames separating the intra-frame and a subsequent inter-frame directly referencing the intra-frame, the method comprising:\n determining a noise level of at least one image frame in said video sequence; determining a representative quantization parameter with which said image frames are to be encoded; based on the determined noise level and the determined quantization parameter, selecting a maximum permissible key frame distance, wherein the selecting the maximum permissible key frame distance comprises:\n encoding a plurality of video test sequences, each video test sequence having a respective noise level, wherein each video test sequence is encoded using a respective quantization parameter and using a plurality of key frame distances; \n for each video test sequence, determining an output bitrate for each key frame distance; \n storing, for each combination of noise level, quantization parameter, and key frame distance, the determined output bitrate; and \n for each such combination of noise level and quantization parameter, identifying as maximum permissible key frame distance a maximum key frame distance at which output bitrate decreases in response to an increase in key frame distance; and \n encoding the image frames in the video sequence using the determined quantization parameter and using a key frame distance which is less than or equal to the maximum permissible key frame distance.

Metadata:
- Claim Count in Document: 20.0
- Percentile: 90.0
- Lexical Diversity: 2.53968
- Patent Class: 375.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12601267', '10459104', '14939590', '14887964', '12013655']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5008582071452174
- 35 USC 102 Novelty (BERT): 0.5072349487556673
- Combined Prediction Score: 0.5014958813062624
- Mean Citation Score: 263.996562
- Max Citation Score: 295.4681
- Similarity Product: 230.67751908784507

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