PATENT CLAIM ANALYSIS

Application Number: 16399705
Application Type: Utility
Filing Date: 2019-04
Publication Date: 2019-08
Patent Classification: ["704", "500000"]

Abstract:
The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.

Claim (Index 3):
A non-transitory storage medium having stored thereon a computer program for performing a method of decoding a bit stream comprising an encoded lowband signal and an encoded power spectral envelope of a stereo signal or a multichannel signal having a first channel and a second channel, the method comprising:\n producing a lowband output signal, the lowband output signal having a lowband stereo signal, wherein the lowband core decoder is configured for receiving the encoded lowband signal included in the bit stream; receiving the encoded power spectral envelope of the stereo signal or the multichannel signal having the first channel and the second channel, the first channel and the second channel having a set of frequency bands, the encoded power spectral envelope being represented by a balance parameter for each frequency band and a level parameter representing a total power of the first channel and the second channel for each frequency band; converting the balance parameters and the level parameters into power values of the first channel and the second channel; and generating a synthetic highband signal using the lowband output signal and for adjusting a spectral envelope of the synthetic highband signal using the power values of the first channel and the second channel to obtain an adjusted highband signal and for combining the adjusted highband signal and the lowband output signal to obtain a decoded stereo signal or a decoded multichannel signal.

Metadata:
- Claim Count in Document: 5.0
- Percentile: 100.0
- Lexical Diversity: 1.52083
- Patent Class: 704.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12610186', '16157899', '15458143', '15458150', '15458135']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.3749620986564478
- 35 USC 102 Novelty (BERT): 0.6023097691089424
- Combined Prediction Score: 0.3976968657016972
- Mean Citation Score: 445.9019
- Max Citation Score: 473.47003
- Similarity Product: 430.5175636271471

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