Title:
低ビットレートオーディオ符号化用の効率的かつスケーラブルなパラメトリックステレオ符号化
Document Type and Number:
Japanese Patent JP4700467
Kind Code:
B2
Abstract:
The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
Inventors:
Fredrick Hen
Christopher Kjelling
Rals Gustav Lilgerido
Jonas Rheden
Jonas Enggard
Christopher Kjelling
Rals Gustav Lilgerido
Jonas Rheden
Jonas Enggard
Application Number:
JP2005289554A
Publication Date:
June 15, 2011
Filing Date:
October 03, 2005
Export Citation:
Assignee:
Dolby International AB
International Classes:
H04S5/02; G10L19/008; G10L19/14; G10L19/24; H04S1/00; H04S3/00; H04S5/00; H04S7/00; G10L19/02; H04S
Domestic Patent References:
| JP6251844A | ||||
| JP5165500A | ||||
| JP8305398A |
Attorney, Agent or Firm:
Takao Matsuyama