发明名称 |
Allocation, by sub-bands, of bits for quantifying spatial information parameters for parametric encoding |
摘要 |
A method is provided for allocating bits for quantifying spatial information parameters by frequency sub-band for parametric encoding/decoding of a multichannel audio stream representative of a soundstage consisting of a plurality of sound sources. The method includes a step of quantifying or inversely quantifying, by frequency sub-band, spatial information parameters for the sound sources of the soundscape. The method further includes: assessing a spatial resolution of the current sub-band on the basis of the spectral properties of the sub-band; and determining a number of bits to be allocated to the current sub-band, the number of bits to be allocated being inversely proportional to the estimated spatial resolution. Also provided is a device for allocating quantification bits implementing the above-described method. |
申请公布号 |
US9263050(B2) |
申请公布日期 |
2016.02.16 |
申请号 |
US201214008418 |
申请日期 |
2012.03.28 |
申请人 |
ORANGE |
发明人 |
Daniel Adrien;Nicol Rozenn |
分类号 |
G10L19/008;G10L19/002;G10L19/02 |
主分类号 |
G10L19/008 |
代理机构 |
Westman, Champlin & Koehler, P.A. |
代理人 |
Brush David D.;Westman, Champlin & Koehler, P.A. |
主权项 |
1. A method comprising:
allocating quantization bits for spatial information parameters per frequency sub-band, for a parametric coding or decoding of a multichannel audio stream representing a sound scene having a plurality of sound sources and including at least one of quantization or inverse quantization per frequency sub-band of spatial information parameters of the sound sources of the sound scene, wherein allocating comprises; estimation by an allocation device of a spatial resolution of a current sub-band on the basis of spectral properties of the sub-band; and determination by the allocation device of a number of bits to be allocated to the current sub-band, the number of bits to be allocated being inversely proportional to the estimated spatial resolution. |
地址 |
Paris FR |