发明名称 |
AUDIO BANDWIDTH EXTENSION BY INSERTION OF TEMPORAL PRE-SHAPED NOISE IN FREQUENCY DOMAIN |
摘要 |
An audio decoder device for decoding a bitstream includes a bitstream receiver configured to receive the bitstream and to derive an encoded audio signal from the bitstream; a core decoder module configured for deriving a decoded audio signal in a time domain from the encoded audio signal; a temporal envelope generator configured to determine a temporal envelope of the decoded audio signal; a bandwidth extension module configured to produce a frequency domain bandwidth extension signal; a time-to-frequency converter configured to transform the decoded audio signal into a frequency domain decoded audio signal; a combiner configured to combine the frequency domain decoded audio signal and the frequency domain bandwidth extension signal in order to produce a bandwidth extended frequency domain audio signal; and a frequency-to-time converter configured to transform the bandwidth extended frequency domain audio signal into a bandwidth-extended time domain audio signal. |
申请公布号 |
US2016240200(A1) |
申请公布日期 |
2016.08.18 |
申请号 |
US201615136417 |
申请日期 |
2016.04.22 |
申请人 |
Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. |
发明人 |
DISCH Sascha;MULTRUS Markus;SCHUBERT Benjamin;SCHNELL Markus |
分类号 |
G10L19/028;G10L19/02;G10L19/16 |
主分类号 |
G10L19/028 |
代理机构 |
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代理人 |
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主权项 |
1. An audio decoder device for decoding a bitstream, the audio decoder device comprising:
a bitstream receiver configured to receive the bitstream and to derive an encoded audio signal from the bitstream; a core decoder module configured for deriving a decoded audio signal in time domain from the encoded audio signal; a temporal envelope generator configured to determine a temporal envelope of the decoded audio signal; a bandwidth extension module configured to produce a frequency domain bandwidth extension signal, wherein the bandwidth extension module comprises a noise generator configured to produce a noise signal in time domain, wherein the bandwidth extension module comprises a pre-shaping module configured for temporal shaping of the noise signal depending on the temporal envelope of the decoded audio signal in order to produce a shaped noise signal and wherein the bandwidth extension module comprises a time-to-frequency converter configured to transform the shaped noise signal into a frequency domain noise signal, wherein the frequency domain bandwidth extension signal depends on the frequency domain noise signal; a time-to-frequency converter configured to transform the decoded audio signal into a frequency domain decoded audio signal; a combiner configured to combine the frequency domain decoded audio signal and the frequency domain bandwidth extension signal in order to produce a bandwidth extended frequency domain audio signal; and a frequency-to-time converter configured to transform the bandwidth extended frequency domain audio signal into a bandwidth-extended time domain audio signal. |
地址 |
Munich DE |