PATENT CLAIM ANALYSIS

Application Number: 15860311
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-05
Patent Classification: ["704", "500000"]

Abstract:
A coding efficiency of coding spectral coefficients of a spectrum of an audio signal is increased by en/decoding a currently to be en/decoded spectral coefficient by entropy en/decoding and, in doing so, performing the entropy en/decoding depending, in a context-adaptive manner, on a previously en/decoded spectral coefficient, while adjusting a relative spectral distance between the previously en/decoded spectral coefficient and the currently en/decoded spectral coefficient depending on an information concerning a shape of the spectrum. The information concerning the shape of the spectrum may have a measure of a pitch or periodicity of the audio signal, a measure of an inter-harmonic distance of the audio signal's spectrum and/or relative locations of formants and/or valleys of a spectral envelope of the spectrum, and on the basis of this knowledge, the spectral neighborhood which is exploited in order to form the context of the currently to be en/decoded spectral coefficients may be adapted to the thus determined shape of the spectrum, thereby enhancing the entropy coding efficiency.

Claim (Index 6):
Decoder according to  claim 1 , wherein the decoder is configured such that\n the information concerning the shape of the spectrum is a measure of a pitch of the audio signal and the decoder is configured to adjust the relative spectral distance depending on the measure of the pitch such that the relative spectral distance increases with increasing pitch, or the information concerning the shape of the spectrum is a measure of a periodicity of the audio signal and the decoder is configured to adjust the relative spectral distance depending on the measure of periodicity such that the relative spectral distance decreases with increasing periodicity, or the information concerning the shape of the spectrum is a measure of an inter-harmonic distance of the audio signal's spectrum, and the decoder is configured to adjust the relative spectral distance depending on the measure of the inter-harmonic distance such that the relative spectral distance increases with increasing inter-harmonic distance, or the information concerning the shape of the spectrum comprises relative locations of formants and/or valleys of a spectral envelope of the spectrum, and the decoder is configured to adjust the relative spectral distance depending on the location such that the relative spectral distance increases with increasing spectral distance between the valleys in the spectral envelope and/or between the formants in the spectral envelope.

Metadata:
- Claim Count in Document: 50.0
- Percentile: 86.0
- Lexical Diversity: 2.52857
- Patent Class: 704.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15130589', '15000844', '14574830', '13004282', '13081241']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.3273281928388897
- 35 USC 102 Novelty (BERT): 0.6572983032776052
- Combined Prediction Score: 0.3603252038827613
- Mean Citation Score: 388.312504
- Max Citation Score: 652.22375
- Similarity Product: 621.3177536295353

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