Apparatus and method for encoding a multi-channel audio signal

JA Gibbs - US Patent 8,577,045, 2013 - Google Patents
For example, the International Telecommunication Union (ITU) is standardizing a speech
encoder known as the Embed ded Variable Bit Rate Codec (EV-VBR) which can encode a …

Method and device for sound activity detection and sound signal classification

V Malenovsky, M Jelinek, T Vaillancourt… - US Patent …, 2015 - Google Patents
A device and method for estimating a tonal stability of a Sound signal include: calculating a
current residual spectrum of the sound signal; detecting peaks in the current residual …

Spectral comb voice activity detection

AK Anhari, A Escott, P Zakarauskas - US Patent 9,959,886, 2018 - Google Patents
The various implementations described enable voice activity detection and/or pitch
estimation for speech signal processing in, for example and without limitation, hearing aids …

Pitch detection method and apparatus

F Qi, D Zhang, L Miao, J Xu, Q Zhang, Y Gao - US Patent 9,153,245, 2015 - Google Patents
A pitch detection method and apparatus are disclosed. The method includes: performing
pitch detection on an input signal in a signal domain, and obtaining a candidate pitch; …

Pitch detection method and apparatus

K Oh - US Patent 7,593,847, 2009 - Google Patents
(57) ABSTRACT A pitch detection method and apparatus, the pitch detection apparatus
includes: a data rearrangement unit which rear ranges Voice data on the basis of a center …

Pitch-based frequency domain voice removal

J Laroche - US Patent 8,219,390, 2012 - Google Patents
This disclosure relates to voice removal techniques. Such techniques may be useful in a
variety of applications, includ ing the now very popular field of karaoke entertaining. In …

Estimating fractional chirp rate with multiple frequency representations

DC Bradley, YH Morin, J Intoy, S O'connor… - US Patent …, 2018 - Google Patents
An estimate of a fractional chirp rate of a signal may be computed by using multiple
frequency representations of the signal. A first frequency representation may be computed …

Low-frequency emphasis for LPC-based coding in frequency domain

S Doehla, B Grill, C Helmrich, N Rettelbach - US Patent 10,176,817, 2019 - Google Patents
The invention provides an audio encoder including a com bination of a linear predictive
coding filter having a plurality of linear predictive coding coefficients and a time-frequency …

Determining features of harmonic signals

DC Bradley, YH Morin, M Mascaro, JI Intoy… - US Patent …, 2018 - Google Patents
Features that may be computed from a harmonic signal include a fractional chirp rate, a
pitch, and amplitudes of the harmonics. A fractional chirp rate may be estimated, for …

Model based real time pitch tracking system and singer evaluation method

KVR Rao, S Kathirisetti… - US Patent App. 12 …, 2010 - Google Patents
The various embodiments herein provide a system and method to track the pitch of a human
being in real time using time varying model. According to one embodiment, the input voice is …