US 12,243,549 B2
Method, apparatus and systems for audio decoding and encoding
Heiko Purnhagen, Sundbyberg (DE); Kristofer Kjörling, Solna (SE); Alexander Stahlmann, Bubenreuth (DE); Jens Popp, Nuremberg (DE); and Karl Jonas Roeden, Solna (SE)
Assigned to DOLBY INTERNATIONAL AB, Dublin (IE)
Filed by DOLBY INTERNATIONAL AB, Dublin (IE)
Filed on May 10, 2023, as Appl. No. 18/314,865.
Application 17/343,761 is a division of application No. 15/903,591, filed on Feb. 23, 2018, granted, now 11,037,582, issued on Jun. 15, 2021.
Application 15/903,591 is a division of application No. 14/779,170, granted, now 9,911,434, issued on Mar. 6, 2018, previously published as PCT/EP2014/056848, filed on Apr. 4, 2014.
Application 18/314,865 is a continuation of application No. 17/343,761, filed on Jun. 10, 2021, granted, now 11,676,622.
Claims priority of provisional application 61/808,701, filed on Apr. 5, 2013.
Prior Publication US 2023/0274755 A1, Aug. 31, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/00 (2013.01); G10L 19/022 (2013.01); G10L 19/16 (2013.01); G10L 21/055 (2013.01); H04N 21/2368 (2011.01); H04N 21/43 (2011.01); H04N 21/439 (2011.01); G10L 19/22 (2013.01)
CPC G10L 21/055 (2013.01) [G10L 19/022 (2013.01); G10L 19/167 (2013.01); H04N 21/2368 (2013.01); H04N 21/4302 (2013.01); H04N 21/4398 (2013.01); G10L 19/22 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An audio processing system for decoding an audio bitstream segmented into audio frames carrying audio data, the audio processing system comprising:
a dequantization stage adapted to receive quantized spectral coefficients corresponding to one audio frame in the audio bitstream, and to output a first frequency-domain representation of an intermediate signal;
an inverse transform stage adapted to receive the first frequency-domain representation of the intermediate signal and output, based thereon, a first time-domain representation of the intermediate signal;
an analysis filterbank for receiving the first time-domain representation of the intermediate signal and outputting a second frequency-domain representation of the intermediate signal;
a synthesis filterbank for receiving the second frequency-domain representation and outputting a second time-domain representation of a processed audio signal; and
a sample rate converter for receiving said second time-domain representation of the processed audio signal and outputting a reconstructed audio signal sampled at a target sampling frequency.