CN105518776A

5G,4G,3G

Title

Apparatus and method for decoding or encoding an audio signal using energy information values for a reconstruction band

Application Number:

CN2014841267

Publication Date:

20-04-2016

Current Assignee:

FRAUNHOFER SOCIETY

Family ID:

49385156

Application Date:

15-07-2014

Declaring Company:

FRAUNHOFER SOCIETY

Publication Country:

US

Priority Date:

22-07-2013

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Title

Apparatus and method for decoding or encoding an audio signal using energy information values for a reconstruction band

Application Number:

CN2014841267

Family ID:

49385156

Publication Country:

US

Publication Date:

20-04-2016

Application Date:

15-07-2014

Priority Date:

22-07-2013

Current Assignee:

FRAUNHOFER SOCIETY

Declaring Company:

FRAUNHOFER SOCIETY

View on Espacenet goto-link

Abstract  Abstract

Device for decoding audio signal the coding audio signal comprising the first group the first frequency spectrum part of coding and parametric data representing frequency spectrum energy of the second group indicating the second frequency spectrum portion of the code expression the device comprises: audio decoder (900) used for the first group to the first frequency spectrum portion of code represents (901b) carry on decoding to get the first group the first frequency spectrum part (904) and the code for parameterization data used for representing carrying out decoding to obtain the second group the second frequency spectrum part and aiming at individual reconsitution frequency band indicating decoding parameter data of individual energy (902) frequency regenerator (906) used for using the first frequency spectrum part in the first group the first part of frequency spectrum and the second frequency spectrum partially comprises (922 923) and reconsitution frequency band (920) of individual energy for reconsitution the frequency spectrum value of the reconsitution frequency band the reconsitution band including the first frequency spectrum part (921) and the second frequency spectrum portion wherein Frequency regenerator (906) is arranged is used for: confirming (912) the residual energy information the remaining energy information with the first frequency spectrum including frequency value portion of the reconsitution frequency band and accumulated energy determine (918) reconsitution frequency band (920) of the frequency value and set with reconsitution frequency band (920) in the first frequency spectrum frequency of the part (921) of the other frequency spectrum part is different (922 923) and a chip energy information wherein the other is the frequency spectrum part (922 923) to use and reconsitution of frequency band of the first frequency spectrum part (921 306) are different and the first frequency spectrum part (302) through frequency regeneration for generating using residual energy information and individual energy reconsitution frequency band is determined for (914) reconsitution frequency band (920) and the energy loss and based on loss energy information and a chip energy information for adjusting (916) and reconsitution is the frequency band of the other frequency spectrum part.

An apparatus for decoding an encoded audio signal comprising an encoded representation of a first set of first spectral portions and an encoded representation of parametric data indicating spectral energies for a second set of second spectral portions comprises: an audio decoder (900) for decoding the encoded representation (901b) of the first set of the first spectral portions to obtain a first set of first spectral portions (904) and for decoding the encoded representation of the parametric data to obtain a decoded parametric data (902) for the second set of second spectral portions indicating for individual reconstruction bands individual energies; a frequency regenerator (906) for reconstructing spectral values in a reconstruction band (920) comprising a second spectral portion (922 923) using a first spectral portion of the first set of the first spectral portions and an individual energy for the reconstruction band the reconstruction band comprising a first spectral portion (921) and the second spectral portion; wherein the frequency regenerator (906) is configured for determining (912) a survive energy information comprising an accumulated energy of the first spectral portion having frequency values in the reconstruction band determining (918) a tile energy information of further spectral portions (922 923) of the reconstruction band (920) for frequency values different from the first spectral portion (921) having frequencies in the reconstruction band (920) wherein the further spectral portions (922 923) are to be generated by frequency regeneration using a first spectral portion (302) different from the first spectral portion (921 306) in the reconstruction band; determining (914) a missing energy in the reconstruction band (920) using the individual energy for the reconstruction band and the survive energy information; and adjusting (916) the further spectral portions in the reconstruction band based on the missing energy information and the tile energy information.

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