Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (CA2610595) FREQUENCY SEGMENTATION TO OBTAIN BANDS FOR EFFICIENT CODING OF DIGITAL MEDIA

Office : Canada
Application Number: 2610595 Application Date: 14.07.2006
Publication Number: 2610595 Publication Date: 25.01.2007
Grant Number: Grant Date: 06.10.2015
Publication Kind : C
Prior PCT appl.: Application Number:PCTUS2006027420 ; Publication Number: Click to see the data
IPC:
G10L 19/12
G10L 19/022
G10L 19/02
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
L
SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19
Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
04
using predictive techniques
08
Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
12
the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
L
SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19
Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
02
using spectral analysis, e.g. transform vocoders or subband vocoders
022
Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
L
SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19
Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
02
using spectral analysis, e.g. transform vocoders or subband vocoders
CPC:
G10L 19/0208
G10L 19/24
Applicants: MICROSOFT CORPORATION
Inventors:
Priority Data: 11/183,087 15.07.2005 US
Title: (EN) FREQUENCY SEGMENTATION TO OBTAIN BANDS FOR EFFICIENT CODING OF DIGITAL MEDIA
(FR) SEGMENTATION DE FREQUENCE PERMETTANT D'OBTENIR DES BANDES DE CODAGE EFFICACE DE DONNEES MULTIMEDIA NUMERIQUES
Abstract:
(EN)


Frequency segmentation is important to the quality of encoding spectral data.
Segmentation involves breaking the spectral data into units called sub-bands
or vectors. Homogeneous segmentation may be suboptimal. Various features are
described for providing spectral data intensity dependent segmentation. Finer
segmentation is provided for regions of greater spectral variance and coarser
segmentation is provided for more homogeneous regions. Sub-bands which have
similar characteristics may be merged with very little effect on quality,
whereas sub-bands with highly variable data may be better represented if a sub-
band is split. Various methods are described for measuring tonality, energy,
or shape of a sub-band. These various measurements are discussed in light of
making decisions of when to split or merge sub-bands to provide variable
frequency segmentation.


Also published as:
NO20076259MXMX/a/2008/000523KR1020080025403IL187883ZA2007/11042JP2009501945
CN101223570NZ564311AU2006270171ID048.0205IN10178/DELNP/2007WO/2007/011749