PATENT CLAIM ANALYSIS

Application Number: 15864574
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-05
Patent Classification: ["704", "500000"]

Abstract:
An audio encoder comprises a multi-channel receiver which receives an M-channel audio signal where M>2. A down-mix processor down-mixes the M-channel audio signal to a first stereo signal and associated parametric data and a spatial processor modifies the first stereo signal to generate a second stereo signal in response to the associated parametric data and spatial parameter data for a binaural perceptual transfer function, such as a Head Related Transfer Function (HRTF). The second stereo signal is a binaural signal and may specifically be a (3D) virtual spatial signal. An output data stream comprising the encoded data and the associated parametric data is generated by an encode processor and an output processor. The HRTF processing may allow the generation of a (3D) virtual spatial signal by conventional stereo decoders. A multi-channel decoder may reverse the process of the spatial processor to generate an improved quality multi-channel signal.

Claim (Index 21):
The method of  claim 19 , further causing the processor to perform the acts of:\n determining a plurality of frequency sub-bands of the first signal; and calculating, for each of the frequency sub-bands of the first signal sub band data values L B , R B  for a first sub band of the second signal as: [ L B R B ] = [ h 11 h 12 h 21 h 22 ] \ue8a0 [ L 0 R 0 ] wherein L O , R O  are corresponding sub band values of the first signal and the spatial parameter data is arranged to determine data values of the multiplication matrix substantially as:\n h 12 =m 12 H L ( L )+ m 22 H L ( R )+ m 32 H L ( C ) \n h 21 =m 11 H R ( L )+ m 21 H R ( R )+ m 31 H R ( C ) \n h 22 =m 11 H R ( L )+ m 22 H R ( R )+ m 32 H R ( C ) \n where m k,l  are parameters determined in response to associated parametric data for a down-mix of channels L, R and C to the first stereo signal, and H J (X) is determined in response to the spatial parameter data for channel X to output channel J of the second signal;

Metadata:
- Claim Count in Document: 7.0
- Percentile: 86.0
- Lexical Diversity: 2.13158
- Patent Class: 704.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['12279856', '14679283', '12681124', '12066509', '11469799']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.3788692700289227
- 35 USC 102 Novelty (BERT): 0.5741390532881033
- Combined Prediction Score: 0.3983962483548408
- Mean Citation Score: 401.842452
- Max Citation Score: 497.6578
- Similarity Product: 397.0215767115116

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