Device and Method for Noise Shaping in a Multilayer Embedded Codec Interoperable with the ITU-T G.711 Standard,申请号US20070664010-传众专利搜索

Device and Method for Noise Shaping in a Multilayer Embedded Codec Interoperable with the ITU-T G.711 Standard

申请公布号：US2011173004(A1)

申请号：US20070664010

申请日期：2007.12.28

申请公布日期：2011.07.14

申请人：

BESSETTE BRUNO;LAPIERRE JIMMY;MALENOVSKY VLADIMIR;LEFEBVRE ROCH;SALAMI REDWAN

发明人：BESSETTE BRUNO;LAPIERRE JIMMY;MALENOVSKY VLADIMIR;LEFEBVRE ROCH;SALAMI REDWAN

分类号：G10L19/00

主分类号：G10L19/00

摘要：A device and method for shaping noise during encoding of an input sound signal comprise pre-emphasizing the input signal or a decoded signal from a given sound signal codec to produce a pre-emphasized signal, computing a filter transfer function based on the pre-emphasized signal, and shaping the noise by filtering the noise through the transfer function to produce a shaped noise signal, wherein the noise shaping comprises producing a noise feedback. A device and method for noise shaping in a multilayer codec, including at least Layer 1 and 2, comprise: at an encoder, producing an encoded sound signal in Layer 1 including Layer 1 noise shaping, and producing a Layer 2 enhancement signal; at a decoder, decoding the Layer 1 encoded sound signal to produce a synthesis signal, decoding the enhancement signal, computing a filter transfer function based on the synthesis signal, filtering the enhancement signal through the transfer function to produce a Layer 2 filtered enhancement signal, and adding the filtered enhancement signal to the synthesis signal to produce an output signal including contributions from Layer 1 and 2.