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1. (NZ564311) Frequency segmentation to obtain bands for efficient coding of digital media

Office : New Zealand
Application Number: 564311 Application Date: 14.07.2006
Publication Number: 564311 Publication Date: 26.02.2010
Grant Number: Grant Date: 10.06.2010
Publication Kind : B
Prior PCT appl.: Application Number:PCTUS2006027420 ; Publication Number: Click to see the data
IPC:
G10K 11/16
G10L 19/02
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
K
SOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
11
Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
16
Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
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 Technology Licensing, LLC
Inventors: Mehrotra, Sanjeev
Chen, Wei-Ge
Agents: AJ PARK
Priority Data: 05 183087 15.07.2005 US
Title: (EN) Frequency segmentation to obtain bands for efficient coding of digital media
Abstract:
(EN) Patent 564311 A method for an audio processing device to encode audio is provided. The method includes: transforming an input block of an audio signal into spectral data, where the spectral data has a baseband portion and an extended band portion; coding the baseband portion of the spectral data into an output bitstream; in the extended band portion of the spectral data, determining characteristics of spectral data; altering an initial configuration by which the extended band portion of the spectral data is segmented into a number of sub-bands based on the determined characteristics; and coding the altered configuration of sub-bands including data indicating individual sub-bands in the extended band altered from the initial configuration. A method for an audio processing device to decode a bitstream representing an audio signal is also provided. The method includes: decoding an encoded baseband from the bitstream; and decoding an encoded extended band from the bitstream. The decoding includes: receiving data including a minimum ratio sub-band size and an altered configuration of sizes of a number of variable size sub-bands; determining a smallest sub-band size in the altered configuration by dividing the smallest sub-band size in the default configuration by the minimum ratio sub-band size; and determining an actual sub-band multiplier by adding an expected sub-band multiplier to a coded difference value...
Also published as:
NO20076259MXMX/a/2008/000523KR1020080025403IL187883ZA2007/11042JP2009501945
CN101223570CA2610595AU2006270171ID048.0205IN10178/DELNP/2007WO/2007/011749