PATENT CLAIM ANALYSIS

Application Number: 16043880
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2018-11
Patent Classification: ["704", "500000"]

Abstract:
A method for recovering lost frame in a media bitstream, where when a frame loss event occurs, a decoder obtains a synthesized high frequency band signal of a current lost frame, and recovery information related to the current lost frame, determines a global gain gradient of the current lost frame, and determines a global gain of the current lost frame according to the global gain gradient and a global gain of each frame in previous M frames of the current lost frame. A high frequency band signal of the current lost frame is obtained by adjusting the synthesized high frequency band signal of the current lost frame according to the global gain and a subframe gain of the current lost frame. Hence, the method enables natural and smooth transitions of the high frequency band signal between the frames, and attenuates noises in the high frequency band signal.

Claim (Index 10):
A method for recovering a lost frame of a media bitstream, comprising:\n obtaining a synthesized high frequency band signal of a current lost frame; obtaining recovery information related to the current lost frame, the recovery information comprising at least one of a coding mode of a last frame received before frame loss, a frame class of the last frame received before the frame loss, or a quantity of continuously lost frames, the quantity of continuously lost frames comprising a quantity of frames continuously lost until the current lost frame; determining a subframe gain gradient of the current lost frame according to the recovery information; determining a subframe gain of the current lost frame according to the subframe gain gradient and a subframe gain of each frame in previous N frames of the current lost frame, N comprising a positive integer; determining a global gain of the current lost frame; and adjusting the synthesized high frequency band signal of the current lost frame according to the subframe gain of the current lost frame and the global gain of the current lost frame to obtain an improved high frequency band signal of the current lost frame.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 95.0
- Lexical Diversity: 2.90741
- Patent Class: 704.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14981956', '14985831', '15385881', '15817296', '14175195']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.3022965230232236
- 35 USC 102 Novelty (BERT): 0.5817264487852012
- Combined Prediction Score: 0.3302395155994214
- Mean Citation Score: 338.395552
- Max Citation Score: 500.80142
- Similarity Product: 437.3772008949732

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test