PATENT CLAIM ANALYSIS

Application Number: 15981645
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-09
Patent Classification: ["704", "500000"]

Abstract:
A audio signal encoding method includes: dividing a frequency band of an audio signal into a plurality of sub-bands, and quantifying a sub-band normalization factor of each sub-band; determining signal bandwidth of bit allocation according to the quantified sub-band normalization factor, or according to the quantified sub-band normalization factor and bit rate information; allocating bits for a sub-band within the determined signal bandwidth; and coding a spectrum coefficient of the audio signal according to the bits allocated for each sub-band. According to embodiments of the present disclosure, during coding and decoding, signal bandwidth of bit allocation is determined according to the quantified sub-band normalization factor and bit rate information. In this manner, the determined signal bandwidth is effectively coded and decoded by centralizing the bits, and audio quality is improved.

Claim (Index 1):
A mobile phone, comprising:\n at least one microphone, configured to convert sound into an analog audio signal; an analog-digital converter, configured to convert the analog signal into an digital audio signal; a digital signal processor, configured to implement the following operations:\n dividing a frequency band of the digital audio signal into a plurality of sub-bands, wherein each sub-band has an index respectively; \n obtaining a sub-band envelope of each sub-band of the digital audio signal; \n quantizing the sub-band envelope of each sub-band of the digital audio signal; \n determining an index of a highest sub-band to be allocated bits according to the quantized sub-band envelope and a ratio factor, wherein the ratio factor is depend on bit rate information, and wherein the ratio factor is greater than 0 and less than 1; \n allocating at least one bit for a sub-band having an index no greater than the index of the highest sub-band to be allocated bits; and \n encoding a spectrum coefficient of the sub-band having the index no greater than the index of the highest sub-band to be allocated bits with the allocated bits; \n a transmitter, configured to transmit the encoded spectrum coefficient.

Metadata:
- Claim Count in Document: 53.0
- Percentile: 93.0
- Lexical Diversity: 2.30645
- Patent Class: 704.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14789755', '13532237', '15354641', '14675031', '14595672']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.2798415983337804
- 35 USC 102 Novelty (BERT): 0.574088784319391
- Combined Prediction Score: 0.3092663169323414
- Mean Citation Score: 368.81412
- Max Citation Score: 469.9539
- Similarity Product: 399.009309879452

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

Dataset: test