http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104078048-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G10L19-24 |
| filingDate | 2013-03-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2017-05-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2017-05-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-104078048-B |
| titleOfInvention | Acoustic decoding device and method thereof |
| abstract | The invention relates to an acoustic decoding method. The method comprises the following steps: demultiplexing an acoustic code stream to obtain low-frequency waveform code data and high-frequency parameter code data; decoding the low-frequency waveform code data to obtain low-frequency spectrum data in an MDCT domain; converting the low-frequency spectrum data in the MDCT domain into an MDFT domain; mapping part of the spectrum data in the low-frequency spectrum data in the MDFT domain to the high-frequency part; conducting parameter decoding on the mapped high-frequency spectrum data according to the high-frequency parameter code data; combining the low-frequency spectrum data in the MDCT domain and the high-frequency spectrum data subjected to parameter decoding in the MDFT domain to form full-frequency spectrum data in the MDFT domain, and finally obtaining acoustic decoding data in a time domain through IMDFT. By means of the acoustic decoding method, an MDFT low frequency spectrum is directly calculated through an MDCT low frequency spectrum, conversion between IMDCT and MDFT is avoided, errors caused by introduction of low-frequency MDFT estimation during MDFT frequency-time domain transformation are avoided by splicing the low-frequency DMCT spectrum and a high-frequency MDFT spectrum into a full-frequency-band MDFT spectrum, computation complexity and computation errors of a decoder are reduced on the premise of maintaining coding quality. |
| priorityDate | 2013-03-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID419504891 http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID54680690 |
Total number of triples: 11.