EP 3455854 B1 20200916 - ADAPTIVE AUDIO CODEC METHOD AND APPARATUS
Title (en)
ADAPTIVE AUDIO CODEC METHOD AND APPARATUS
Title (de)
ADAPTIVES AUDIO-CODEC-VERFAHREN UND ENTSPRECHENDE VORRICHTUNG
Title (fr)
PROCÉDÉ DE CODEC AUDIO ADAPTATIF ET APPAREIL
Publication
Application
Priority
- US 201615151109 A 20160510
- US 201615151200 A 20160510
- US 201615151211 A 20160510
- US 201615151220 A 20160510
- US 2017031735 W 20170509
Abstract (en)
[origin: WO2017196833A1] An encoder includes a low-pass filter to filter input audio signals. The low-pass filter has fixed filter coefficients. The encoder generates quantized signals based on a difference signal. The encoder includes an adaptive quantizer and a decoder to generate feedback signals. The decoder has an inverse quantizer and a predictor. The predictor has fixed control parameters which are based on a frequency response of the low-pass filter. The predictor may include a finite impulse response filter having fixed filter coefficients. The decoder may include an adaptive noise shaping filter coupled between the low-pass filter and the encoder. The adaptive noise shaping filter flattens signals within a frequency spectrum corresponding to a frequency spectrum of the low-pass filter.
IPC 8 full level
G10L 19/26 (2013.01); G10L 19/00 (2013.01); G10L 19/035 (2013.01); G10L 19/04 (2013.01)
CPC (source: EP KR)
G10L 19/035 (2013.01 - EP KR); G10L 19/04 (2013.01 - EP); G10L 19/26 (2013.01 - EP); G10L 19/265 (2013.01 - EP KR); G10L 2019/0001 (2013.01 - EP KR)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2017196833 A1 20171116; AU 2017262757 A1 20190103; AU 2017262757 B2 20220407; CA 3024167 A1 20171116; CN 109416913 A 20190301; CN 109416913 B 20240315; EP 3455854 A1 20190320; EP 3455854 B1 20200916; JP 2019521398 A 20190725; JP 7005036 B2 20220121; KR 20190011742 A 20190207
DOCDB simple family (application)
US 2017031735 W 20170509; AU 2017262757 A 20170509; CA 3024167 A 20170509; CN 201780040686 A 20170509; EP 17724255 A 20170509; JP 2019511820 A 20170509; KR 20187035261 A 20170509