The embodiment of the invention provides an encoding method, decoding method, coder and decoder, the encoding method includes: according to the current number of subbands containing encoding coefficients, selected from at least two in at least one dimension vector encoding coefficient vector to partition; according to the selection of the dimension of vector quantization encoding coefficients will be divided as for the lattice vector, and lattice vector mapping for lattice vector index; lossless encoding of lattice index vector. By the embodiment of the invention, the encoding vector will be divided into vector quantization encoding coefficients for lattice vector, and the lattice vector mapping for lattice index vector, finally the frame index vector of lossless encoding in general can reduce the number of bits encoding use; decoding using vector division and encoding the same the method and process and is decoded by the inverse encoding; and improves the quantization quality, provides a quantitative method for high quality signal processing, including signal types of music.
【技术实现步骤摘要】
【技术保护点】
１．一种编码方法，其特征在于，包括：根据当前子带所包含待编码系数的个数，从至少两个维度矢量中选择至少一个对所述当前子带中的待编码系数进行矢量划分；根据选择的维度将所述待编码系数划分成的矢量量化为格矢量，并将所述格矢量映射为格索引矢量；对所述格索引矢量进行无损编码。
【技术特征摘要】
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