Title:
臨界サンプリングされたフィルタバンクにおけるモデル・ベースの予測
Document Type and Number:
Japanese Patent JP6530787
Kind Code:
B2
Abstract:
The present document relates to audio source coding systems. In particular, the present document relates to audio source coding systems which make use of linear prediction in combination with a filterbank. A method for estimating a first sample (615) of a first subband signal in a first subband of an audio signal is described. The first subband signal of the audio signal is determined using an analysis filterbank (612) comprising a plurality of analysis filters which provide a plurality of subband signals in a plurality of subbands from the audio signal, respectively. The method comprises determining a model parameter (613) of a signal model; determining a prediction coefficient to be applied to a previous sample (614) of a first decoded subband signals derived from the first subband signal, based on the signal model, based on the model parameter (613) and based on the analysis filterbank (612); wherein a time slot of the previous sample (614) is prior to a time slot of the first sample (615); and determining an estimate of the first sample (615) by applying the prediction coefficient to the previous sample (614).
Inventors:
Willemoes, Lars
Application Number:
JP2017131120A
Publication Date:
June 12, 2019
Filing Date:
July 04, 2017
Export Citation:
Assignee:
Dolby International Arb
International Classes:
G10L19/02
Domestic Patent References:
| JP10511243A | ||||
| JP2002006841A | ||||
| JP2004053891A | ||||
| JP2007171821A | ||||
| JP2007519027A | ||||
| JP10063298A |
Foreign References:
| US20060015329 | ||||
| US20030191634 |
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Shinsuke Onuki
Tadahiko Ito
Shinsuke Onuki