US 12,273,519 B2
Encoder, decoder, system and methods for encoding and decoding
Guillaume Fuchs, Bubenreuth (DE); Benjamin Schubert, Nuremberg (DE); Grzegorz Pietrzyk, Nuremberg (DE); Markus Multrus, Nuremberg (DE); and Bernhard Grill, Rueckersdorf (DE)
Assigned to Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Munich (DE)
Filed by Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Munich (DE)
Filed on Jul. 8, 2020, as Appl. No. 16/923,909.
Application 16/923,909 is a continuation of application No. 16/448,511, filed on Jun. 21, 2019, granted, now 10,735,734.
Application 16/448,511 is a continuation of application No. 15/417,232, filed on Jan. 27, 2017, granted, now 10,375,394, issued on Aug. 6, 2019.
Application 15/417,232 is a continuation of application No. PCT/EP2015/067001, filed on Jul. 24, 2015.
Claims priority of application No. 14178780 (EP), filed on Jul. 28, 2014.
Prior Publication US 2020/0344476 A1, Oct. 29, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/126 (2014.01); G10L 19/035 (2013.01); H04N 19/13 (2014.01); H04N 19/184 (2014.01); H04N 19/44 (2014.01); H04N 19/70 (2014.01); H04N 19/91 (2014.01)
CPC H04N 19/126 (2014.11) [G10L 19/035 (2013.01); H04N 19/13 (2014.11); H04N 19/184 (2014.11); H04N 19/44 (2014.11); H04N 19/70 (2014.11); H04N 19/91 (2014.11)] 20 Claims
OG exemplary drawing
 
1. An encoder, comprising:
a first quantization stage configured to quantize an input signal using a dead zone in order to obtain a plurality of quantized values;
an entropy encoder configured to encode the plurality of quantized values using an entropy encoding scheme in order to obtain a plurality of entropy encoded values;
a second quantization stage configured to quantize a residual signal caused by the first quantization stage, wherein the second quantization stage is configured to determine, for a non-zero quantized value, at least one quantized residual value in dependence on a width of the dead zone of the first quantization stage; and
a coded signal former configured to form a coded signal from the plurality of entropy encoded values and the at least one quantized residual value,
wherein the second quantization stage comprises:
an inverse quantizer configured to inverse quantize the plurality of quantized values in dependence on the dead zone in order to obtain an inverse quantized input signal; and
a comparer configured to compare the input signal and the inverse quantized input signal in order to obtain the residual signal;
wherein the second quantization stage is configured to quantize the residual signal in dependence on the dead zone.