首页>
外国专利>
DEVICE AND METHOD FOR NOISE SHAPING IN A MULTILAYER EMBEDDED CODEC INTEROPERABLE WITH THE ITU-T G.711 STANDARD
DEVICE AND METHOD FOR NOISE SHAPING IN A MULTILAYER EMBEDDED CODEC INTEROPERABLE WITH THE ITU-T G.711 STANDARD
展开▼
机译:与ITU-T G.711标准可互操作的多层嵌入式编解码器中的噪声整形装置和方法
展开▼
页面导航
摘要
著录项
相似文献
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.
展开▼